THE inventions that have been thus far described fall into two classes—first, those that were fundamental in the great arts and industries which have been founded and established upon them, and, second, those that have entered into and enlarged other arts that were previously in existence. On coming to consider the subject now under discussion, however, we find ourselves, at this writing, on the threshold of an entirely new and undeveloped art of such boundless possibilities that its ultimate extent can only be a matter of conjecture.
Edison's concrete house, however, involves two main considerations, first of which was the conception or creation of the IDEA—vast and comprehensive—of providing imperishable and sanitary homes for the wage-earner by molding an entire house in one piece in a single operation, so to speak, and so simply that extensive groups of such dwellings could be constructed rapidly and at very reasonable cost. With this idea suggested, one might suppose that it would be a simple matter to make molds and pour in a concrete mixture. Not so, however. And here the second consideration presents itself. An ordinary cement mixture is composed of crushed stone, sand, cement, and water. If such a mixture be poured into deep molds the heavy stone and sand settle to the bottom. Should the mixture be poured into a horizontal mold, like the floor of a house, the stone and sand settle, forming an ununiform mass. It was at this point that invention commenced, in order to produce a concrete mixture which would overcome this crucial difficulty. Edison, with characteristic thoroughness, took up a line of investigation, and after a prolonged series of experiments succeeded in inventing a mixture that upon hardening remained uniform throughout its mass. In the beginning of his experimentation he had made the conditions of test very severe by the construction of forms similar to that shown in the sketch below.
This consisted of a hollow wooden form of the dimensions indicated. The mixture was to be poured into the hopper until the entire form was filled, such mixture flowing down and along the horizontal legs and up the vertical members. It was to be left until the mixture was hard, and the requirement of the test was that there should be absolute uniformity of mixture and mass throughout. This was finally accomplished, and further invention then proceeded along engineering lines looking toward the devising of a system of molds with which practicable dwellings might be cast.
Edison's boldness and breadth of conception are well illustrated in his idea of a poured house, in which he displays his accustomed tendency to reverse accepted methods. In fact, it is this very reversal of usual procedure that renders it difficult for the average mind to instantly grasp the full significance of the principles involved and the results attained.
Up to this time we have been accustomed to see the erection of a house begun at the foundation and built up slowly, piece by piece, of solid materials: first the outer frame, then the floors and inner walls, followed by the stairways, and so on up to the putting on of the roof. Hence, it requires a complete rearrangement of mental conceptions to appreciate Edison's proposal to build a house FROM THE TOP DOWNWARD, in a few hours, with a freely flowing material poured into molds, and in a few days to take away the molds and find a complete indestructible sanitary house, including foundation, frame, floors, walls, stairways, chimneys, sanitary arrangements, and roof, with artistic ornamentation inside and out, all in one solid piece, as if it were graven or bored out of a rock.
To bring about the accomplishment of a project so extraordinarily broad involves engineering and mechanical conceptions of a high order, and, as we have seen, these have been brought to bear on the subject by Edison, together with an intimate knowledge of compounded materials.
The main features of this invention are easily comprehensible with the aid of the following diagrammatic sectional sketch:
It should be first understood that the above sketch is in broad outline, without elaboration, merely to illustrate the working principle; and while the upright structure on the right is intended to represent a set of molds in position to form a three-story house, with cellar, no regular details of such a building (such as windows, doors, stairways, etc.) are here shown, as they would only tend to complicate an explanation.
It will be noted that there are really two sets of molds, an inside and an outside set, leaving a space between them throughout. Although not shown in the sketch, there is in practice a number of bolts passing through these two sets of molds at various places to hold them together in their relative positions. In the open space between the molds there are placed steel rods for the purpose of reinforcement; while all through the entire structure provision is made for water and steam pipes, gas-pipes and electric-light wires being placed in appropriate positions as the molds are assembled.
At the centre of the roof there will be noted a funnel-shaped opening. Into this there is delivered by the endless chain of buckets shown on the left a continuous stream of a special free-flowing concrete mixture. This mixture descends by gravity, and gradually fills the entire space between the two sets of molds. The delivery of the material—or "pouring," as it is called—is continued until every part of the space is filled and the mixture is even with the tip of the roof, thus completing the pouring, or casting, of the house. In a few days afterward the concrete will have hardened sufficiently to allow the molds to be taken away leaving an entire house, from cellar floor to the peak of the roof, complete in all its parts, even to mantels and picture molding, and requiring only windows and doors, plumbing, heating, and lighting fixtures to make it ready for habitation.
In the above sketch the concrete mixers, A, B, are driven by the electric motor, C. As the material is mixed it descends into the tank, D, and flows through a trough into a lower tank, E, in which it is constantly stirred, and from which it is taken by the endless chain of buckets and dumped into the funnel-shaped opening at the top of the molds, as above described.
The molds are made of cast-iron in sections of such size and weight as will be most convenient for handling, mostly in pieces not exceeding two by four feet in rectangular dimensions. The subjoined sketch shows an exterior view of several of these molds as they appear when bolted together, the intersecting central portions representing ribs, which are included as part of the casting for purposes of strength and rigidity.
The molds represented above are those for straight work, such as walls and floors. Those intended for stairways, eaves, cornices, windows, doorways, etc., are much more complicated in design, although the same general principles are employed in their construction.
While the philosophy of pouring or casting a complete house in its entirety is apparently quite simple, the development of the engineering and mechanical questions involves the solution of a vast number of most intricate and complicated problems covering not only the building as a whole, but its numerous parts, down to the minutest detail. Safety, convenience, duration, and the practical impossibility of altering a one-piece solid dwelling are questions that must be met before its construction, and therefore Edison has proceeded calmly on his way toward the goal he has ever had clearly in mind, with utter indifference to the criticisms and jeers of those who, as "experts," have professed positive knowledge of the impossibility of his carrying out this daring scheme.
List of United States patents granted to Thomas A. Edison, arrangedaccording to dates of execution of applications for such patents. Thislist shows the inventions as Mr. Edison has worked upon them from yearto year1868NO. TITLE OF PATENT DATE EXECUTED DATE EXECUTED90,646, Electrographic Vote Recorder . . . . .Oct. 13, 1868186991,527 Printing Telegraph (reissued October25, 1870, numbered 4166, and August5, 1873, numbered 5519). . . . . . . .Jan. 25, 186996,567 Apparatus for Printing Telegraph (reissuedFebruary 1, 1870, numbered3820). . . . . . . . . . . . . . . . .Aug. 17, 186996,681 Electrical Switch for Telegraph Apparatus Aug. 27, 1869102,320 Printing Telegraph—Pope and Edison(reissued April 17, 1877, numbered7621, and December 9, 1884, numbered10,542). . . . . . . . . . . . . . . Sept. 16, 1869103,924 Printing Telegraphs—Pope and Edison(reissued August 5, 1873)1870103,035 Electromotor Escapement. . . . . . . . Feb. 5, 1870128,608 Printing Telegraph Instruments . . . . .May 4, 1870114,656 Telegraph Transmitting Instruments . .June 22, 1870114,658 Electro Magnets for TelegraphInstruments. . . . . . . . . . . . . .June 22, 1870114,657 Relay Magnets for TelegraphInstruments. . . . . . . . . . . . . .Sept. 6, 1870111,112 Electric Motor Governors . . . . . . .June 29, 1870113,033 Printing Telegraph Apparatus . . . . .Nov. 17, 18701871113,034 Printing Telegraph Apparatus . . . . .Jan. 10, 1871123,005 Telegraph Apparatus. . . . . . . . . .July 26, 1871123,006 Printing Telegraph . . . . . . . . . .July 26, 1871123,984 Telegraph Apparatus. . . . . . . . . .July 26, 1871124,800 Telegraphic Recording Instruments. . .Aug. 12, 1871121,601 Machinery for Perforating Paper forTelegraph Purposes . . . . . . . . . .Aug. 16, 1871126,535 Printing Telegraphs. . . . . . . . . .Nov. 13, 1871133,841 Typewriting Machine. . . . . . . . . .Nov. 13, 18711872126,532 Printing Telegraphs. . . . . . . . . . .Jan. 3 1872126,531 Printing Telegraphs. . . . . . . . . .Jan. 17, 1872126,534 Printing Telegraphs. . . . . . . . . .Jan. 17, 1872126,528 Type Wheels for Printing Telegraphs. .Jan. 23, 1872126,529 Type Wheels for Printing Telegraphs. .Jan. 23, 1872126,530 Printing Telegraphs. . . . . . . . . .Feb. 14, 1872126,533 Printing Telegraphs. . . . . . . . . .Feb. 14, 1872132,456 Apparatus for Perforating Paper forTelegraphic Use. . . . . . . . . . . March 15, 1872132,455 Improvement in Paper for ChemicalTelegraphs . . . . . . . . . . . . . April 10, 1872133,019 Electrical Printing Machine. . . . . April 18, 1872128,131 Printing Telegraphs. . . . . . . . . April 26, 1872128,604 Printing Telegraphs. . . . . . . . . April 26, 1872128,605 Printing Telegraphs. . . . . . . . . April 26, 1872128,606 Printing Telegraphs. . . . . . . . . April 26, 1872128,607 Printing Telegraphs. . . . . . . . . April 26, 1872131,334 Rheotomes or Circuit Directors . . . . .May 6, 1872134,867 Automatic Telegraph Instruments. . . . .May 8, 1872134,868 Electro Magnetic Adjusters . . . . . . .May 8, 1872130,795 Electro Magnets. . . . . . . . . . . . .May 9, 1872131,342 Printing Telegraphs. . . . . . . . . . .May 9, 1872131,341 Printing Telegraphs. . . . . . . . . . May 28, 1872131,337 Printing Telegraphs. . . . . . . . . .June 10, 1872131,340 Printing Telegraphs. . . . . . . . . .June 10, 1872131,343 Transmitters and Circuits for PrintingTelegraph. . . . . . . . . . . . . . .June 10, 1872131,335 Printing Telegraphs. . . . . . . . . .June 15, 1872131,336 Printing Telegraphs. . . . . . . . . .June 15, 1872131,338 Printing Telegraphs. . . . . . . . . .June 29, 1872131,339 Printing Telegraphs. . . . . . . . . .June 29, 1872131,344 Unison Stops for Printing Telegraphs .June 29, 1872134,866 Printing and Telegraph Instruments . .Oct. 16, 1872138,869 Printing Telegraphs. . . . . . . . . .Oct. 16, 1872142,999 Galvanic Batteries . . . . . . . . . .Oct. 31, 1872141,772 Automatic or Chemical Telegraphs . . . Nov. 5, 1872135,531 Circuits for Chemical Telegraphs . . . Nov. 9, 1872146,812 Telegraph Signal Boxes . . . . . . . .Nov. 26, 1872141,773 Circuits for Automatic Telegraphs. . .Dec. 12, 1872141,776 Circuits for Automatic Telegraphs. . .Dec. 12, 1872150,848 Chemical or Automatic Telegraphs . . .Dec. 12, 1872
1873139,128 Printing Telegraphs. . . . . . . . . .Jan. 21, 1873139,129 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873140,487 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873140,489 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873138,870 Printing Telegraphs. . . . . . . . . .March 7, 1873141,774 Chemical Telegraphs. . . . . . . . . .March 7, 1873141,775 Perforator for Automatic Telegraphs. .March 7, 1873141,777 Relay Magnets. . . . . . . . . . . . .March 7, 1873142,688 Electric Regulators for TransmittingInstruments . . . . . . . . . . . . . .March 7, 1873156,843 Duplex Chemical Telegraphs . . . . . .March 7, 1873147,312 Perforators for Automatic Telegraphy March 24, 1873147,314 Circuits for Chemical Telegraphs . . March 24, 1873150,847 Receiving Instruments for ChemicalTelegraphs . . . . . . . . . . . . . March 24, 1873140,488 Printing Telegraphs. . . . . . . . . April 23, 1873147,311 Electric Telegraphs. . . . . . . . . April 23, 1873147,313 Chemical Telegraphs. . . . . . . . . April 23, 1873147,917 Duplex Telegraphs. . . . . . . . . . April 23, 1873150,846 Telegraph Relays . . . . . . . . . . April 23, 1873160,405 Adjustable Electro Magnets forRelays, etc. . . . . . . . . . . . . April 23, 1873162,633 Duplex Telegraphs. . . . . . . . . . April 22, 1873151,209 Automatic Telegraphy and PerforatorsTherefor . . . . . . . . . . . . . . .Aug. 25, 1873160,402 Solutions for Chemical Telegraph PaperSept. 29, 1873160,404 Solutions for Chemical Telegraph PaperSept. 29, 1873160,580 Solutions for Chemical Telegraph PaperOct. 14, 1873160,403 Solutions for Chemical Telegraph PaperOct. 29, 18731874
154,788 District Telegraph Signal Box. . . . .April 2, 1874168,004 Printing Telegraph . . . . . . . . . . May 22, 1874166,859 Chemical Telegraphy. . . . . . . . . . June 1, 1874166,860 Chemical Telegraphy. . . . . . . . . . June 1, 1874166,861 Chemical Telegraphy. . . . . . . . . . June 1, 1874158,787 Telegraph Apparatus. . . . . . . . . . Aug. 7, 1874172,305 Automatic Roman CharacterTelegraph. . . . . . . . . . . . . . . Aug. 7, 1874173,718 Automatic Telegraphy . . . . . . . . . Aug. 7, 1874178,221 Duplex Telegraphs. . . . . . . . Aug. 19, 1874178,222 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874178,223 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874180,858 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874207,723 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874480,567 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874207,724 Duplex Telegraphs. . . . . . . . . . .Dec. 14, 1874
1875168,242 Transmitter and Receiver for AutomaticTelegraph. . . . . . . . . . . . . . .Jan. 18, 1875168,243 Automatic Telegraphs . . . . . . . . .Jan. 18, 1875168,385 Duplex Telegraphs. . . . . . . . . . .Jan. 18, 1875168,466 Solution for Chemical Telegraphs . . .Jan. 18, 1875168,467 Recording Point for Chemical Telegraph Jan. 18, 1875195,751 Automatic Telegraphs . . . . . . . . . Jan. 18 1875195,752 Automatic Telegraphs . . . . . . . . .Jan. 19, 1875171,273 Telegraph Apparatus. . . . . . . . . . Feb 11, 1875169,972 Electric Signalling Instrument . . . . Feb 24, 1875209,241 Quadruplex Telegraph Repeaters (reissuedSeptember 23, 1879, numbered8906). . . . . . . . . . . . . . . . . Feb 24, 18751876180,857 Autographic Printing . . . . . . . . .March 7, 1876198,088 Telephonic Telegraphs. . . . . . . . .April 3, 1876198,089 Telephonic or Electro HarmonicTelegraphs . . . . . . . . . . . . . .April 3, 1876182,996 Acoustic Telegraphs. . . . . . . . . . .May 9, 1876186,330 Acoustic Electric Telegraphs . . . . . .May 9, 1876186,548 Telegraph Alarm and Signal Apparatus . .May 9, 1876198,087 Telephonic Telegraphs. . . . . . . . . .May 9, 1876185,507 Electro Harmonic Multiplex Telegraph .Aug. 16, 1876200,993 Acoustic Telegraph . . . . . . . . . .Aug. 26, 1876235,142 Acoustic Telegraph . . . . . . . . . .Aug. 26, 1876200,032 Synchronous Movements for ElectricTelegraphs . . . . . . . . . . . . . .Oct. 30, 1876200,994 Automatic Telegraph Perforator andTransmitter. . . . . . . . . . . . . .Oct. 30, 18761877205,370 Pneumatic Stencil Pens . . . . . . . . Feb. 3, 1877213,554 Automatic Telegraphs . . . . . . . . . Feb. 3, 1877196,747 Stencil Pens . . . . . . . . . . . . April 18, 1877203,329 Perforating Pens . . . . . . . . . . April 18, 1877474,230 Speaking Telegraph . . . . . . . . . April 18, 1877217,781 Sextuplex Telegraph. . . . . . . . . . .May 8, 1877230,621 Addressing Machine . . . . . . . . . . .May 8, 1877377,374 Telegraphy . . . . . . . . . . . . . . .May 8, 1877453,601 Sextuplex Telegraph. . . . . . . . . . May 31, 1877452,913 Sextuplex Telegraph. . . . . . . . . . May 31, 1877512,872 Sextuplex Telegraph. . . . . . . . . . May 31, 1877474,231 Speaking Telegraph . . . . . . . . . . July 9, 1877203,014 Speaking Telegraph . . . . . . . . . .July 16, 1877208,299 Speaking Telegraph . . . . . . . . . .July 16, 1877203,015 Speaking Telegraph . . . . . . . . . .Aug. 16, 1877420,594 Quadruplex Telegraph . . . . . . . . .Aug. 16, 1877492,789 Speaking Telegraph . . . . . . . . . .Aug. 31, 1877203,013 Speaking Telegraph . . . . . . . . . . Dec. 8, 1877203 018 Telephone or Speaking Telegraph. . . . Dec. 8, 1877200 521 Phonograph or Speaking Machine . . . .Dec. 15, 18771878203,019 Circuit for Acoustic or TelephonicTelegraphs . . . . . . . . . . . . . .Feb. 13, 1878201,760 Speaking Machines. . . . . . . . . . .Feb. 28, 1878203,016 Speaking Machines. . . . . . . . . . .Feb. 28, 1878203,017 Telephone Call Signals . . . . . . . .Feb. 28, 1878214,636 Electric Lights. . . . . . . . . . . . Oct. 5, 1878222,390 Carbon Telephones. . . . . . . . . . . Nov. 8, 1878217,782 Duplex Telegraphs. . . . . . . . . . .Nov. 11, 1878214,637 Thermal Regulator for Electric Lights.Nov. 14, 1878210,767 Vocal Engines. . . . . . . . . . . . .Aug. 31, 1878218,166 Magneto Electric Machines. . . . . . . Dec. 3, 1878218,866 Electric Lighting Apparatus. . . . . . Dec. 3, 1878219,628 Electric Lights. . . . . . . . . . . . Dec. 3, 1878295,990 Typewriter . . . . . . . . . . . . . . Dec. 4, 1878218,167 Electric Lights. . . . . . . . . . . .Dec. 31, 18781879224,329 Electric Lighting Apparatus. . . . . .Jan. 23, 1879227,229 Electric Lights. . . . . . . . . . . .Jan. 28, 1879227,227 Electric Lights. . . . . . . . . . . . Feb. 6, 1879224.665 Autographic Stencils for Printing. . March 10, 1879227.679 Phonograph . . . . . . . . . . . . . March 19, 1879221,957 Telephone. . . . . . . . . . . . . . March 24, 1879227,229 Electric Lights. . . . . . . . . . . April 12, 1879264,643 Magneto Electric Machines. . . . . . April 21, 1879219,393 Dynamo Electric Machines . . . . . . . July 7, 1879231,704 Electro Chemical Receiving Telephone .July 17, 1879266,022 Telephone. . . . . . . . . . . . . . . Aug. 1, 1879252,442 Telephone. . . . . . . . . . . . . . . Aug. 4, 1879222,881 Magneto Electric Machines. . . . . . .Sept. 4, 1879223,898 Electric Lamp. . . . . . . . . . . . . Nov. 1, 18791880230,255 Electric Lamps . . . . . . . . . . . .Jan. 28, 1880248,425 Apparatus for Producing High Vacuums Jan.28 1880265,311 Electric Lamp and Holder for Same. . . Jan. 28 1880369,280 System of Electrical Distribution. . .Jan. 28, 1880227,226 Safety Conductor for Electric Lights .March 10,1880228,617 Brake for Electro Magnetic Motors. . March 10, 1880251,545 Electric Meter . . . . . . . . . . . March 10, 1880525,888 Manufacture of Carbons for ElectricLamps. . . . . . . . . . . . . . . . March 10, 1880264,649 Dynamo or Magneto Electric Machines. March 11,1880228,329 Magnetic Ore Separator . . . . . . . .April 3, 1880238,868 Manufacture of Carbons for IncandescentElectric Lamps . . . . . . . . . . . April 25, 1880237,732 Electric Light . . . . . . . . . . . .June 15, 1880248,417 Manufacturing Carbons for ElectricLights . . . . . . . . . . . . . . . .June 15, 1880298,679 Treating Carbons for Electric Lights .June 15, 1880248,430 Electro Magnetic Brake . . . . . . . . July 2, 1880265,778 Electro Magnetic Railway Engine. . . . July 3, 1880248,432 Magnetic Separator . . . . . . . . . .July 26, 1880239,150 Electric Lamp. . . . . . . . . . . . .July 27, 1880239,372 Testing Electric Light Carbons—Edisonand Batchelor. . . . . . . . . . . . .July 28, 1880251,540 Carbon Electric Lamps. . . . . . . . .July 28, 1880263,139 Manufacture of Carbons for ElectricLamps. . . . . . . . . . . . . . . . .July 28, 1880434,585 Telegraph Relay. . . . . . . . . . . .July 29, 1880248 423 Carbonizer . . . . . . . . . . . . . .July 30, 1880263 140 Dynamo Electric Machines . . . . . . .July 30, 1880248,434 Governor for Electric Engines. . . . .July 31, 1880239,147 System of Electric Lighting. . . . . .July 31, 1880264,642 Electric Distribution and TranslationSystem . . . . . . . . . . . . . . . . Aug. 4, 1880293,433 Insulation of Railroad Tracks used forElectric Circuits. . . . . . . . . . . Aug. 6, 1880239,373 Electric Lamp. . . . . . . . . . . . . Aug. 7, 1880239,745 Electric Lamp. . . . . . . . . . . . . Aug. 7, 1880263,135 Electric Lamp. . . . . . . . . . . . . Aug. 7, 1880251,546 Electric Lamp. . . . . . . . . . . . .Aug. 10, 1880239,153 Electric Lamp. . . . . . . . . . . . .Aug. 11, 1880351,855 Electric Lamp. . . . . . . . . . . . .Aug. 11, 1880248,435 Utilizing Electricity as Motive Power.Aug. 12, 1880263,132 Electro Magnetic Roller. . . . . . . .Aug. 14, 1880264,645 System of Conductors for the Distributionof Electricity . . . . . . . . . . . .Sept. 1, 1880240,678 Webermeter . . . . . . . . . . . . . Sept. 22, 1880239,152 System of Electric Lighting. . . . . .Oct. 14, 1880239,148 Treating Carbons for Electric Lights .Oct. 15, 1880238,098 Magneto Signalling Apparatus—Edisonand Johnson. . . . . . . . . . . . . .Oct. 21, 1880242,900 Manufacturing Carbons for ElectricLamps. . . . . . . . . . . . . . . . .Oct. 21, 1880251,556 Regulator for Magneto or DynamoElectric Machines. . . . . . . . . . .Oct. 21, 1880248,426 Apparatus for Treating Carbons forElectric Lamps . . . . . . . . . . . . Nov. 5, 1880239,151 Forming Enlarged Ends on CarbonFilaments. . . . . . . . . . . . . . .Nov. 19, 188012,631 Design Patent—Incandescent ElectricLamp . . . . . . . . . . . . . . . . .Nov. 23, 1880239,149 Incandescing Electric Lamp . . . . . . Dec. 3, 1880242,896 Incandescent Electric Lamp . . . . . . Dec. 3, 1880242,897 Incandescent Electric Lamp . . . . . . Dec. 3, 1880248,565 Webermeter . . . . . . . . . . . . . . Dec. 3, 1880263,878 Electric Lamp. . . . . . . . . . . . . Dec. 3, 1880239,154 Relay for Telegraphs . . . . . . . . .Dec. 11, 1880242,898 Dynamo Electric Machine. . . . . . . .Dec. 11, 1880248,431 Preserving Fruit . . . . . . . . . . .Dec. 11, 1880265,777 Treating Carbons for Electric Lamps. .Dec. 11, 1880239,374 Regulating the Generation of ElectricCurrents . . . . . . . . . . . . . . .Dec. 16, 1880248,428 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Dec. 16, 1880248,427 Apparatus for Treating Carbons forElectric Lamps . . . . . . . . . . . .Dec. 21, 1880248,437 Apparatus for Treating Carbons forElectric Lamps . . . . . . . . . . . .Dec. 21, 1880248,416 Manufacture of Carbons for ElectricLights . . . . . . . . . . . . . . . .Dec. 30, 18801881242,899 Electric Lighting. . . . . . . . . . .Jan. 19, 1881248,418 Electric Lamp. . . . . . . . . . . . . Jan. 19 1881248,433 Vacuum Apparatus . . . . . . . . . . . Jan. 19 1881251,548 Incandescent Electric Lamps. . . . . .Jan. 19, 1881406,824 Electric Meter . . . . . . . . . . . .Jan. 19, 1881248,422 System of Electric Lighting. . . . . .Jan. 20, 1881431,018 Dynamo or Magneto Electric Machine . . Feb. 3, 1881242,901 Electric Motor . . . . . . . . . . . .Feb. 24, 1881248,429 Electric Motor . . . . . . . . . . . .Feb. 24, 1881248,421 Current Regulator for Dynamo ElectricMachine. . . . . . . . . . . . . . . .Feb. 25, 1881251,550 Magneto or Dynamo Electric Machines. .Feb. 26, 1881251,555 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 26, 1881482,549 Means for Controlling ElectricGeneration . . . . . . . . . . . . . .March 2, 1881248,420 Fixture and Attachment for ElectricLamps. . . . . . . . . . . . . . . . .March 7, 1881251,553 Electric Chandeliers . . . . . . . . .March 7, 1881251,554 Electric Lamp and Socket or Holder . .March 7, 1881248,424 Fitting and Fixtures for ElectricLamps. . . . . . . . . . . . . . . . .March 8, 1881248,419 Electric Lamp. . . . . . . . . . . . March 30, 1881251,542 System of Electric Light . . . . . . April 19, 1881263,145 Making Incandescents . . . . . . . . April 19, 1881266,447 Electric Incandescent Lamp . . . . . April 21, 1881251,552 Underground Conductors . . . . . . . April 22, 1881476,531 Electric Lighting System . . . . . . April 22, 1881248,436 Depositing Cell for Plating the Connectionsof Electric Lamps. . . . . . . . . . . May 17, 1881251,539 Electric Lamp. . . . . . . . . . . . . May 17, 1881263,136 Regulator for Dynamo or MagnetoElectric Machine . . . . . . . . . . . May 17, 1881251,557 Webermeter . . . . . . . . . . . . . . May 19, 1881263,134 Regulator for Magneto ElectricMachine. . . . . . . . . . . . . . . . May 19, 1881251,541 Electro Magnetic Motor . . . . . . . . May 20, 1881251,544 Manufacture of Electric Lamps. . . . . May 20, 1881251,549 Electric Lamp and the Manufacturethereof. . . . . . . . . . . . . . . . May 20, 1881251,558 Webermeter . . . . . . . . . . . . . . May 20, 1881341,644 Incandescent Electric Lamp . . . . . . May 20, 1881251,551 System of Electric Lighting. . . . . . May 21, 1881263,137 Electric Chandelier. . . . . . . . . . May 21, 1881263,141 Straightening Carbons for IncandescentLamps. . . . . . . . . . . . . . . . . May 21, 1881264,657 Incandescent Electric Lamps. . . . . . May 21, 1881251,543 Electric Lamp. . . . . . . . . . . . . May 24, 1881251,538 Electric Light . . . . . . . . . . . . May 27, 1881425,760 Measurement of Electricity in DistributionSystem . . . . . . . . . . . . . . . .May 3 1, 1881251,547 Electrical Governor. . . . . . . . . . June 2, 1881263,150 Magneto or Dynamo Electric Machines. June 3, 1881263,131 Magnetic Ore Separator . . . . . . . . June 4, 1881435,687 Means for Charging and Using SecondaryBatteries. . . . . . . . . . . . . . .June 21, 1881263,143 Magneto or Dynamo Electric Machines. .June 24, 1881251,537 Dynamo Electric Machine. . . . . . . .June 25, 1881263,147 Vacuum Apparatus . . . . . . . . . . .July 1, 188 1439,389 Electric Lighting System . . . . . . . July 1, 1881263,149 Commutator for Dynamo or MagnetoElectric Machines. . . . . . . . . . .July 22, 1881479,184 Facsimile Telegraph—Edison and Kenny.July 26, 1881400,317 Ore Separator. . . . . . . . . . . . .Aug. 11, 1881425,763 Commutator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Aug. 20, 1881263,133 Dynamo or Magneto Electric Machine . .Aug. 24, 1881263,142 Electrical Distribution System . . . .Aug. 24, 1881264,647 Dynamo or Magneto Electric Machines. .Aug. 24, 1881404,902 Electrical Distribution System . . . .Aug. 24, 1881257,677 Telephone. . . . . . . . . . . . . . .Sept. 7, 1881266,021 Telephone. . . . . . . . . . . . . . .Sept. 7, 1881263,144 Mold for Carbonizing Incandescents . Sept. 19, 1881265,774 Maintaining Temperatures inWebermeters. . . . . . . . . . . . . Sept. 21, 1881264,648 Dynamo or Magneto Electric Machines. Sept. 23, 1881265,776 Electric Lighting System . . . . . . Sept. 27, 1881524,136 Regulator for Dynamo ElectricalMachines . . . . . . . . . . . . . . Sept. 27, 1881273,715 Malleableizing Iron. . . . . . . . . . Oct. 4, 1881281,352 Webermeter . . . . . . . . . . . . . . Oct. 5, 1881446,667 Locomotives for Electric Railways. . .Oct. 11, 1881288,318 Regulator for Dynamo or MagnetoElectric Machines. . . . . . . . . . .Oct. 17, 1881263,148 Dynamo or Magneto Electric Machines. Oct. 25, 1881264,646 Dynamo or Magneto Electric Machines. Oct. 25, 1881251,559 Electrical Drop Light. . . . . . . . .Oct. 25, 1881266,793 Electric Distribution System . . . . .Oct. 25, 1881358,599 Incandescent Electric Lamp . . . . . .Oct. 29, 1881264,673 Regulator for Dynamo Electric Machine. Nov. 3, 1881263,138 Electric Arc Light . . . . . . . . . . Nov. 7, 1881265,775 Electric Arc Light . . . . . . . . . . .Nov. 7 1881297,580 Electric Arc Light . . . . . . . . . . .Nov. 7 1881263,146 Dynamo Magneto Electric Machines . . .Nov. 22, 1881266,588 Vacuum Apparatus . . . . . . . . . . .Nov. 25, 1881251,536 Vacuum Pump. . . . . . . . . . . . . . Dec. 5, 1881264,650 Manufacturing Incandescent ElectricLamps. . . . . . . . . . . . . . . . . Dec. 5, 1881264,660 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . Dec. 5, 1881379,770 Incandescent Electric Lamp . . . . . . Dec. 5, 1881293,434 Incandescent Electric Lamp . . . . . . Dec. 5, 1881439,391 Junction Box for Electric Wires. . . . Dec. 5, 1881454,558 Incandescent Electric Lamp . . . . . . Dec. 5, 1881264,653 Incandescent Electric Lamp . . . . . .Dec. 13, 1881358,600 Incandescing Electric Lamp . . . . . .Dec. 13, 1881264,652 Incandescent Electric Lamp . . . . . .Dec. 15, 1881278,419 Dynamo Electric Machines . . . . . . .Dec. 15, 18811882265,779 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Jan. 17, 1882264,654 Incandescent Electric Lamps. . . . . .Feb. 10, 1882264,661 Regulator for Dynamo Electric Machines Feb. 10, 1882264,664 Regulator for Dynamo Electric Machines Feb. 10, 1882264,668 Regulator for Dynamo Electric Machines Feb. 10, 1882264,669 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 10, 1882264,671 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 10, 1882275,613 Incandescing Electric Lamp . . . . . .Feb. 10, 1882401,646 Incandescing Electric Lamp . . . . . .Feb. 10, 1882264,658 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 28, 1882264,659 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 28, 1882265,780 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 28, 1882265,781 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 28, 1882278,416 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Feb. 28, 1882379,771 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Feb. 28, 1882272,034 Telephone. . . . . . . . . . . . . . March 30, 1882274,576 Transmitting Telephone . . . . . . . March 30, 1882274,577 Telephone. . . . . . . . . . . . . . March 30, 1882264,662 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . .May 1, 1882264,663 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . .May 1, 1882264,665 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . .May 1, 1882264,666 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . .May 1, 1882268,205 Dynamo or Magneto ElectricMachine. . . . . . . . . . . . . . . . .May 1, 1882273,488 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . .May 1, 1882273,492 Secondary Battery. . . . . . . . . . . May 19, 1882460,122 Process of and Apparatus forGenerating Electricity . . . . . . . . May 19, 1882466,460 Electrolytic Decomposition . . . . . .May 19,. 1882264,672 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . May 22, 1882264,667 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . May 22, 1882265,786 Apparatus for Electrical Transmissionof Power . . . . . . . . . . . . . . . May 22, 1882273,828 System of Underground Conductors ofElectric Distribution. . . . . . . . . May 22, 1882379,772 System of Electrical Distribution. . . May 22, 1882274,292 Secondary Battery. . . . . . . . . . . June 3, 1882281,353 Dynamo or Magneto Electric Machine . . June 3, 1882287,523 Dynamo or Magneto Electric Machine . . June 3, 1882365,509 Filament for Incandescent ElectricLamps. . . . . . . . . . . . . . . . . .June 3 1882446,668 Electric Are Light . . . . . . . . . . .June 3 1882543,985 Incandescent Conductor for ElectricLamps. . . . . . . . . . . . . . . . . June 3, 1882264,651 Incandescent Electric Lamps. . . . . . June 9, 1882264,655 Incandescing Electric Lamps. . . . . . June 9, 1882264,670 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . . June 9, 1882273,489 Turn-Table for Electric Railway. . . . June 9, 1882273,490 Electro Magnetic Railway System. . . . June 9, 1882401,486 System of Electric Lighting. . . . . .June 12, 1882476,527 System of Electric Lighting. . . . . .June 12, 1882439,390 Electric Lighting System . . . . . . .June 19, 1882446,666 System of Electric Lighting. . . . . .June 19, 1882464,822 System of Distributing Electricity . .June 19, 1882304,082 Electrical Meter . . . . . . . . . . .June 24, 1882274,296 Manufacture of Incandescents . . . . . July 5, 1882264,656 Incandescent Electric Lamp . . . . . . July 7, 1882265,782 Regulator for Dynamo Electric Machines July 7, 1882265,783 Regulator for Dynamo Electric Machines July 7, 1882265,784 Regulator for Dynamo Electric Machines July 7, 1882265,785 Dynamo Electric Machine. . . . . . . . July 7, 1882273,494 Electrical Railroad. . . . . . . . . . July 7, 1882278,418 Translating Electric Currents from Highto Low Tension . . . . . . . . . . . . July 7, 1882293,435 Electrical Meter . . . . . . . . . . . July 7, 1882334,853 Mold for Carbonizing . . . . . . . . . July 7, 1882339,278 Electric Railway . . . . . . . . . . . July 7, 1882273,714 Magnetic Electric SignallingApparatus. . . . . . . . . . . . . . . Aug. 5, 1882282,287 Magnetic Electric SignallingApparatus. . . . . . . . . . . . . . . Aug. 5, 1882448,778 Electric Railway . . . . . . . . . . . Aug. 5, 1882439,392 Electric Lighting System . . . . . . .Aug. 12, 1882271,613 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Aug. 25, 1882287,518 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Aug. 25, 1882406,825 Electric Meter . . . . . . . . . . . .Aug. 25, 1882439,393 Carbonizing Chamber. . . . . . . . . .Aug. 25, 1882273,487 Regulator for Dynamo Electric Machines Sept. 12, 1882297,581 Incandescent Electric Lamp . . . . . Sept. 12, 1882395,962 Manufacturing Electric Lamps . . . . Sept. 16, 1882287,525 Regulator for Systems of ElectricalDistribution—Edison and C. L.Clarke . . . . . . . . . . . . . . . . Oct. 4, 1882365,465 Valve Gear . . . . . . . . . . . . . . Oct. 5, 1882317,631 Incandescent Electric Lamp . . . . . . Oct. 7, 1882307,029 Filament for Incandescent Lamp . . . . Oct. 9, 1882268,206 Incandescing Electric Lamp . . . . . .Oct. 10, 1882273,486 Incandescing Electric Lamp . . . . . .Oct. 12, 1882274,293 Electric Lamp. . . . . . . . . . . . .Oct. 14, 1882275,612 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Oct. 14, 1882430,932 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Oct. 14, 1882271,616 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Oct. 16, 1882543,986 Process for Treating Products Derivedfrom Vegetable Fibres. . . . . . . . .Oct. 17, 1882543,987 Filament for Incandescent Lamps. . . .Oct. 17, 1882271,614 Shafting . . . . . . . . . . . . . . .Oct. 19, 1882271,615 Governor for Dynamo ElectricMachines . . . . . . . . . . . . . . .Oct. 19, 1882273,491 Regulator for Driving Engines ofElectrical Generators. . . . . . . . .Oct. 19, 1882273,493 Valve Gear for Electrical GeneratorEngines. . . . . . . . . . . . . . . .Oct. 19, 1882411,016 Manufacturing Carbon Filaments . . . .Oct. 19, 1882492,150 Coating Conductors for IncandescentLamps. . . . . . . . . . . . . . . . .Oct. 19, 1882273,485 Incandescent Electric Lamps. . . . . .Oct. 26, 1882317,632 Incandescent Electric Lamps. . . . . .Oct. 26, 1882317,633 Incandescent Electric Lamps. . . . . .Oct. 26, 1882287,520 Incandescing Conductor for ElectricLamps. . . . . . . . . . . . . . . . . Nov. 3, 1882353,783 Incandescent Electric Lamp . . . . . . Nov. 3, 1882430,933 Filament for Incandescent Lamps. . . . Nov. 3, 1882274,294 Incandescent Electric Lamp . . . . . .Nov. 13, 1882281,350 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Nov. 13, 1882274,295 Incandescent Electric Lamp . . . . . .Nov. 14, 1882276,233 Electrical Generator and Motor . . . .Nov. 14, 1882274,290 System of Electrical Distribution. . .Nov. 20, 1882274,291 Mold for Carbonizer. . . . . . . . . .Nov. 28, 1882278,413 Regulator for Dynamo Electric MachinesNov. 28, 1882278,414 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Nov. 28, 1882287,519 Manufacturing Incandescing ElectricLamps. . . . . . . . . . . . . . . . .Nov. 28, 1882287,524 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Nov. 28, 1882438,298 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Nov. 28, 1882276,232 Operating and Regulating ElectricalGenerators . . . . . . . . . . . . . .Dec. 20, 18821883278,415 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Jan. 13, 1883278,417 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Jan. 13, 1883281,349 Regulator for Dynamo ElectricMachines . . . . . . . . . . . . . . .Jan. 13, 1883283,985 System of Electrical Distribution. . . Jan. 13 1883283,986 System o' Electrical Distribution. . . Jan. 13 1883459,835 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .Jan. 13, 188313,940 Design Patent—Incandescing ElectricLamp . . . . . . . . . . . . . . . . . Feb. 13 1883280,727 System of Electrical Distribution. . . Feb. 13 1883395,123 Circuit Controller for Dynamo Machine.Feb. 13, 1883287,521 Dynamo or Magneto Electric Machine . .Feb. 17, 1883287,522 Molds for Carbonizing. . . . . . . . .Feb. 17, 1883438,299 Manufacture of Carbon Filaments. . . .Feb. 17, 1883446,669 Manufacture of Filaments for IncandescentElectric Lamps . . . . . . . . . . . .Feb. 17, 1883476,528 Incandescent Electric Lamp . . . . . .Feb. 17, 1883281,351 Electrical Generator . . . . . . . . .March 5, 1883283,984 System of Electrical Distribution. . .March 5, 1883287,517 System of Electrical Distribution. . .March 14,1883283,983 System of Electrical Distribution. . .April 5, 1883354,310 Manufacture of Carbon Conductors . . .April 6, 1883370,123 Electric Meter . . . . . . . . . . . .April 6, 1883411,017 Carbonizing Flask. . . . . . . . . . .April 6, 1883370,124 Manufacture of Filament for IncandescingElectric Lamp. . . . . . . . . . . . April 12, 1883287,516 System of Electrical Distribution. . . .May 8, 1883341,839 Incandescent Electric Lamp . . . . . . .May 8, 1883398,774 Incandescent Electric Lamp . . . . . . .May 8, 1883370,125 Electrical Transmission of Power . . . June 1, 1883370,126 Electrical Transmission of Power . . . June 1, 1883370,127 Electrical Transmission of Power . . . June 1, 1883370,128 Electrical Transmission of Power . . . June 1, 1883370,129 Electrical Transmission of Power . . . June 1, 1883370,130 Electrical Transmission of Power . . . June 1, 1883370,131 Electrical Transmission of Power . . . June 1, 1883438,300 Gauge for Testing Fibres forIncandescent Lamp Carbons. . . . . . . June 1, 1883287,511 Electric Regulator . . . . . . . . . .June 25, 1883287,512 Dynamo Electric Machine. . . . . . . .June 25, 1883287,513 Dynamo Electric Machine. . . . . . . .June 25, 1883287,514 Dynamo Electric Machine. . . . . . . .June 25, 1883287,515 System of Electrical Distribution. . .June 25, 1883297,582 Dynamo Electric Machine. . . . . . . .June 25, 1883328,572 Commutator for Dynamo Electric Machines June 25, 1883430,934 Electric Lighting System . . . . . . .June 25, 1883438,301 System of Electric Lighting. . . . . .June 25, 1883297,583 Dynamo Electric Machines . . . . . . .July 27, 1883304,083 Dynamo Electric Machines . . . . . . .July 27; 1883304,084 Device for Protecting Electric LightSystems from Lightning . . . . . . . .July 27, 1883438,302 Commutator for Dynamo ElectricMachine. . . . . . . . . . . . . . . .July 27, 1883476,529 System of Electrical Distribution. . .July 27, 1883297,584 Dynamo Electric Machine. . . . . . . . Aug. 8, 1883307,030 Electrical Meter . . . . . . . . . . . Aug. 8, 1883297,585 Incandescing Conductor for ElectricLamps. . . . . . . . . . . . . . . . Sept. 14, 1883297,586 Electrical Conductor . . . . . . . . Sept. 14, 1883435,688 Process and Apparatus for GeneratingElectricity. . . . . . . . . . . . . Sept. 14, 1883470,922 Manufacture of Filaments forIncandescent Lamps . . . . . . . . . Sept. 14, 1883490,953 Generating Electricity . . . . . . . . Oct. 9, 1883293,432 Electrical Generator or Motor. . . . .Oct. 17, 1883307,031 Electrical Indicator . . . . . . . . . Nov. 2, 1883337,254 Telephone—Edison and Bergmann . . . .Nov. 10, 1883297,587 Dynamo Electric Machine. . . . . . . .Nov. 16, 1883298,954 Dynamo Electric Machine. . . . . . . .Nov. 15, 1883298,955 Dynamo Electric Machine. . . . . . . .Nov. 15, 1883304,085 System of Electrical Distribution. . .Nov. 15, 1883509,517 System of Electrical Distribution. . .Nov. 15, 1883425,761 Incandescent Lamp. . . . . . . . . . .Nov. 20, 1883304,086 Incandescent Electric Lamp . . . . . .Dec. 15, 18831884298,956 Operating Dynamo Electric Machine. . . Jan. 5, 1884304,087 Electrical Conductor . . . . . . . . .Jan. 12, 1884395,963 Incandescent Lamp Filament . . . . . .Jan. 22, 1884526,147 Plating One Material with Another. . .Jan. 22, 1884339,279 System of Electrical Distribution. . . Feb. 8, 1884314,115 Chemical Stock Quotation Telegraph—Edison and Kenny . . . . . . . . . . . Feb. 9, 1884436,968 Method and Apparatus for DrawingWire . . . . . . . . . . . . . . . . . June 2, 1884436,969 Apparatus for Drawing Wire . . . . . . June 2, 1884438,303 Arc Lamp . . . . . . . . . . . . . . . June 2, 1884343,017 System of Electrical Distribution. . .June 27, 1884391,595 System of Electric Lighting. . . . . .July 16, 1884328,573 System of Electric Lighting. . . . . Sept. 12, 1884328,574 System of Electric Lighting. . . . . Sept. 12, 1884328,575 System of Electric Lighting. . . . . Sept. 12, 1884391,596 Incandescent Electric Lamp . . . . . Sept. 24, 1884438,304 Electric Signalling Apparatus. . . . Sept. 24, 1884422,577 Apparatus for Speaking Telephones—Edison and Gilliland . . . . . . . . .Oct. 21, 1884329,030 Telephone. . . . . . . . . . . . . . . Dec. 3, 1884422,578 Telephone Repeater . . . . . . . . . . Dec. 9, 1884422,579 Telephone Repeater . . . . . . . . . . Dec. 9, 1884340,707 Telephonic Repeater. . . . . . . . . . Dec. 9, 1884340,708 Electrical Signalling Apparatus. . . .Dec. 19, 1884347,097 Electrical Signalling Apparatus. . . .Dec. 19, 1884478,743 Telephone Repeater . . . . . . . . . .Dec. 31, 18841885340,709 Telephone Circuit—Edison andGilliland. . . . . . . . . . . . . . . Jan. 2, 1885378,044 Telephone Transmitter. . . . . . . . . Jan. 9, 1885348,114 Electrode for Telephone Transmitters .Jan. 12, 1885438,305 Fuse Block . . . . . . . . . . . . . .Jan. 14, 1885350,234 System of Railway Signalling—Edisonand Gilliland. . . . . . . . . . . . .March 27,1885486,634 System of Railway Signalling—Edisonand Gilliland. . . . . . . . . . . . .March 27,1885333,289 Telegraphy . . . . . . . . . . . . . April 27, 1885333,290 Duplex Telegraphy. . . . . . . . . . April 30, 1885333,291 Way Station Quadruplex Telegraph . . . .May 6, 1885465,971 Means for Transmitting Signals Electrically May 14, 1885422 072 Telegraphy . . . . . . . . . . . . . . Oct. 7, 1885437 422 Telegraphy . . . . . . . . . . . . . . Oct. 7, 1885422,073 Telegraphy . . . . . . . . . . . . . Nov. I 2, 1885422,074 Telegraphy . . . . . . . . . . . . . .Nov. 24, 1885435,689 Telegraphy . . . . . . . . . . . . . .Nov. 30, 1885438,306 Telephone - Edison and Gilliland . . .Dec. 22, 1885350,235 Railway Telegraphy—Edison andGilliland. . . . . . . . . . . . . . .Dec. 28, 18851886406,567 Telephone. . . . . . . . . . . . . . .Jan. 28, 1886474,232 Speaking Telegraph . . . . . . . . . .Feb. 17, 1886370 132 Telegraphy . . . . . . . . . . . . . . May 11, 1886411,018 Manufacture of Incandescent Lamps. . .July 15, 1886438,307 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . July I 5, 1886448,779 Telegraph. . . . . . . . . . . . . . .July IS, 1886411,019 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . .July 20, 1886406,130 Manufacture of Incandescent ElectricLamps. . . . . . . . . . . . . . . . . Aug. 6, 1886351,856 Incandescent Electric Lamp . . . . . Sept. 30, 1886454,262 Incandescent Lamp Filaments. . . . . .Oct. 26, 1886466,400 Cut-Out for Incandescent Lamps—Edisonand J. F. Ott. . . . . . . . . . . . .Oct. 26, 1886484,184 Manufacture of Carbon Filaments. . . .Oct. 26, 1886490,954 Manufacture of Carbon Filaments forElectric Lamps . . . . . . . . . . . . Nov. 2, 1886438,308 System of Electrical Distribution. . . Nov. 9, 1886524,378 System of Electrical Distribution. . . Nov. 9, 1886365,978 System of Electrical Distribution. . .Nov. 22, 1886369 439 System of Electrical Distribution. . .Nov. 22, 1886384 830 Railway Signalling—Edison and Gilliland Nov. 24, 1886379,944 Commutator for Dynamo Electric MachinesNov. 26, 1886411,020 Manufacture of Carbon Filaments. . . .Nov. 26, 1886485,616 Manufacture of Carbon Filaments. . . . .Dec 6, 1886485,615 Manufacture of Carbon Filaments. . . . .Dec 6, 1886525,007 Manufacture of Carbon Filaments. . . . Dec. 6, 1886369,441 System of Electrical Distribution. . .Dec. 10, 1886369,442 System of Electrical Distribution. . .Dec. 16, 1886369,443 System of Electrical Distribution. . .Dec. 16, 1886484,185 Manufacture of Carbon Filaments. . . .Dec. 20, 1886534,207 Manufacture of Carbon Filaments. . . .Dec. 20, 1886373,584 Dynamo Electric Machine. . . . . . . .Dec. 21, 18861887468,949 Converter System for ElectricRailways . . . . . . . . . . . . . . . Feb. 7, 1887380,100 Pyromagnetic Motor . . . . . . . . . . May 24, 1887476,983 Pyromagnetic Generator . . . . . . . . .May 24 1887476,530 Incandescent Electric Lamp . . . . . . June 1, 1887377,518 Magnetic Separator . . . . . . . . . .June 30, 1887470,923 Railway Signalling . . . . . . . . . . Aug. 9, 1887545,405 System of Electrical Distribution. . .Aug. 26, 1887380,101 System of Electrical Distribution. . .Sept. 13 1887380,102 System of Electrical Distribution. . .Sept. 14 1887470,924 Electric Conductor . . . . . . . . . Sept. 26, 1887563,462 Method of and Apparatus for DrawingWire . . . . . . . . . . . . . . . . .Oct. 17, 1887385,173 System of Electrical Distribution. . . Nov. 5, 1887506,215 Making Plate Glass . . . . . . . . . . Nov. 9, 1887382,414 Burnishing Attachments for PhonographsNov. 22, 1887386,974 Phonograph . . . . . . . . . . . . . .Nov. 22, 1887430,570 Phonogram Blank. . . . . . . . . . . .Nov. 22, 1887382,416 Feed and Return Mechanism for PhonographsNov. 29, 1887382,415 System of Electrical Distribution. . . Dec. 4, 1887382,462 Phonogram Blanks . . . . . . . . . . . Dec. 5, 18871888484,582 Duplicating Phonograms . . . . . . . .Jan. 17, 1888434,586 Electric Generator . . . . . . . . . .Jan. 21, 1888434,587 Thermo Electric Battery. . . . . . . .Jan. 21, 1888382,417 Making Phonogram Blanks. . . . . . . .Jan. 30, 1888389,369 Incandescing Electric Lamp . . . . . . Feb. 2, 1888382,418 Phonogram Blank. . . . . . . . . . . .Feb. 20, 1888390,462 Making Carbon Filaments. . . . . . . .Feb. 20, 1888394,105 Phonograph Recorder. . . . . . . . . .Feb. 20, 1888394,106 Phonograph Reproducer. . . . . . . . .Feb. 20, 1888382,419 Duplicating Phonograms . . . . . . . .March 3, 1888425,762 Cut-Out for Incandescent Lamps . . . .March 3, 1888396,356 Magnetic Separator . . . . . . . . . .March 19,1888393,462 Making Phonogram Blanks. . . . . . . April 28, 1888393,463 Machine for Making Phonogram Blanks. April 28, 1888393,464 Machine for Making Phonogram Blanks. April 28, 1888534,208 Induction Converter. . . . . . . . . . .May 7, 1888476,991 Method of and Apparatus for SeparatingOres . . . . . . . . . . . . . . . . . .May 9, 1888400,646 Phonograph Recorder and Reproducer . . May 22, 1888488,190 Phonograph Reproducer. . . . . . . . . May 22, 1888488,189 Phonograph . . . . . . . . . . . . . . May 26, 1888470,925 Manufacture of Filaments for IncandescentElectric Lamps . . . . . . . . . . . .June 21, 1888393,465 Preparing Phonograph Recording Surfaces June 30, 1888400,647 Phonograph . . . . . . . . . . . . . .June 30, 1888448,780 Device for Turning Off Phonogram Blanks June 30, 1888393,466 Phonograph Recorder. . . . . . . . . .July 14, 1888393,966 Recording and Reproducing Sounds . . .July 14, 1888393,967 Recording and Reproducing Sounds . . .July 14, 1888430,274 Phonogram Blank. . . . . . . . . . . .July 14, 1888437,423 Phonograph . . . . . . . . . . . . . .July 14, 1888450,740 Phonograph Recorder. . . . . . . . . .July 14, 1888485,617 Incandescent Lamp Filament . . . . . .July 14, 1888448,781 Turning-Off Device for Phonographs . .July 16, 1888400,648 Phonogram Blank. . . . . . . . . . . .July 27, 1888499,879 Phonograph . . . . . . . . . . . . . .July 27, 1888397,705 Winding Field Magnets. . . . . . . . .Aug. 31, 1888435,690 Making Armatures for Dynamo ElectricMachines . . . . . . . . . . . . . . .Aug. 31, 1888430,275 Magnetic Separator . . . . . . . . . Sept. 12, 1888474,591 Extracting Gold from Sulphide Ores . Sept. 12, 1888397,280 Phonograph Recorder and Reproducer . Sept. 19, 1888397,706 Phonograph . . . . . . . . . . . . . Sept. 29, 1888400,649 Making Phonogram Blanks. . . . . . . Sept. 29, 1888400,650 Making Phonogram Blanks. . . . . . . .Oct. 15, 1888406,568 Phonograph . . . . . . . . . . . . . .Oct. 15, 1888437,424 Phonograph . . . . . . . . . . . . . .Oct. 15, 1888393,968 Phonograph Recorder. . . . . . . . . .Oct. 31, 18881889406,569 Phonogram Blank. . . . . . . . . . . .Jan. 10, 1889488,191 Phonogram Blank. . . . . . . . . . . .Jan. 10, 1889430,276 Phonograph . . . . . . . . . . . . . .Jan. 12, 1889406,570 Phonograph . . . . . . . . . . . . . . Feb. 1, 1889406,571 Treating Phonogram Blanks. . . . . . . Feb. 1, 1889406,572 Automatic Determining Device forPhonographs. . . . . . . . . . . . . . Feb. 1, 1889406,573 Automatic Determining Device forPhonographs. . . . . . . . . . . . . . Feb. 1, 1889406,574 Automatic Determining Device forPhonographs. . . . . . . . . . . . . . Feb. 1, 1889406,575 Automatic Determining Device forPhonographs. . . . . . . . . . . . . . Feb. 1, 1889406,576 Phonogram Blank. . . . . . . . . . . . Feb. 1, 1889430,277 Automatic Determining Device forPhonographs. . . . . . . . . . . . . . Feb. 1, 1889437,425 Phonograph Recorder. . . . . . . . . . Feb. 1, 1889414,759 Phonogram Blanks . . . . . . . . . . March 22, 1889414,760 Phonograph . . . . . . . . . . . . . March 22, 1889462,540 Incandescent Electric Lamps. . . . . March 22, 1889430,278 Phonograph . . . . . . . . . . . . . .April 8, 1889438,309 Insulating Electrical Conductors . . April 25, 1889423,039 Phonograph Doll or Other Toys. . . . .June 15, 1889426,527 Automatic Determining Device forPhonographs. . . . . . . . . . . . . .June 15, 1889430,279 Voltaic Battery. . . . . . . . . . . .June 15, 1889506,216 Apparatus for Making Glass . . . . . .June 29, 1889414,761 Phonogram Blanks . . . . . . . . . . .July 16, 1889430,280 Magnetic Separator . . . . . . . . . .July 20, 1889437,426 Phonograph . . . . . . . . . . . . . .July 20, 1889465,972 Phonograph . . . . . . . . . . . . . .Nov. 14, 1889443,507 Phonograph . . . . . . . . . . . . . . Dec. 11 1889513,095 Phonograph . . . . . . . . . . . . . . Dec. 11 18891890434,588 Magnetic Ore Separator—Edison andW. K. L. Dickson . . . . . . . . . . .Jan. 16, 1890437,427 Making Phonogram Blanks. . . . . . . . Feb. 8, 1890465,250 Extracting Copper Pyrites. . . . . . . Feb. 8, 1890434,589 Propelling Mechanism for Electric Vehicles Feb. 14, 1890438,310 Lamp Base. . . . . . . . . . . . . . April 25, 1890437,428 Propelling Device for Electric Cars. April 29, 1890437,429 Phonogram Blank. . . . . . . . . . . April 29, 1890454,941 Phonograph Recorder and Reproducer . . .May 6, 1890436,127 Electric Motor . . . . . . . . . . . . May 17, 1890484,583 Phonograph Cutting Tool. . . . . . . . May 24, 1890484,584 Phonograph Reproducer. . . . . . . . . May 24, 1890436,970 Apparatus for Transmitting Power . . . June 2, 1890453,741 Phonograph . . . . . . . . . . . . . . July 5, 1890454,942 Phonograph . . . . . . . . . . . . . . July 5, 1890456,301 Phonograph Doll. . . . . . . . . . . . July 5, 1890484,585 Phonograph . . . . . . . . . . . . . . July 5, 1890456,302 Phonograph . . . . . . . . . . . . . . Aug. 4, 1890476,984 Expansible Pulley. . . . . . . . . . . Aug. 9, 1890493,858 Transmission of Power. . . . . . . . . Aug. 9, 1890457,343 Magnetic Belting . . . . . . . . . . .Sept. 6, 1890444,530 Leading-in Wires for Incandescent ElectricLamps (reissued October 10, 1905,No. 12,393). . . . . . . . . . . . . Sept. 12, 1890534 209 Incandescent Electric Lamp . . . . . Sept. 13, 1890476 985 Trolley for Electric Railways. . . . .Oct. 27, 1890500,280 Phonograph . . . . . . . . . . . . . .Oct. 27, 1890541,923 Phonograph . . . . . . . . . . . . . .Oct. 27, 1890457,344 Smoothing Tool for PhonogramBlanks . . . . . . . . . . . . . . . .Nov. 17, 1890460,123 Phonogram Blank Carrier. . . . . . . .Nov. 17, 1890500,281 Phonograph . . . . . . . . . . . . . .Nov. 17, 1890541,924 Phonograph . . . . . . . . . . . . . .Nov. 17, 1890500,282 Phonograph . . . . . . . . . . . . . . Dec. 1, 1890575,151 Phonograph . . . . . . . . . . . . . . Dec. 1, 1890605,667 Phonograph . . . . . . . . . . . . . . Dec. 1, 1890610,706 Phonograph . . . . . . . . . . . . . . Dec. 1, 1890622,843 Phonograph . . . . . . . . . . . . . . Dec. 1, 1890609,268 Phonograph . . . . . . . . . . . . . . Dec. 6, 1890493,425 Electric Locomotive. . . . . . . . . .Dec. 20, 18901891476,992 Incandescent Electric Lamp . . . . . .Jan. 20, 1891470,926 Dynamo Electric Machine or Motor . . . Feb. 4, 1891496,191 Phonograph . . . . . . . . . . . . . . Feb. 4, 1891476,986 Means for Propelling Electric Cars . .Feb. 24, 1891476,987 Electric Locomotive. . . . . . . . . .Feb. 24, 1891465,973 Armatures for Dynamos or Motors. . . .March 4, 1891470,927 Driving Mechanism for Cars . . . . . .March 4, 1891465,970 Armature Connection for Motors orGenerators . . . . . . . . . . . . . March 20, 1891468,950 Commutator Brush for Electric Motorsand Dynamos. . . . . . . . . . . . . March 20, 1891475,491 Electric Locomotive. . . . . . . . . . June 3, 1891475,492 Electric Locomotive. . . . . . . . . . June 3, 1891475,493 Electric Locomotive. . . . . . . . . . June 3, 1891475,494 Electric Railway . . . . . . . . . . . June 3, 1891463,251 Bricking Fine Ores . . . . . . . . . .July 31, 1891470,928 Alternating Current Generator. . . . .July 31, 1891476,988 Lightning Arrester . . . . . . . . . .July 31, 1891476,989 Conductor for Electric Railways. . . .July 31, 1891476,990 Electric Meter . . . . . . . . . . . .July 31, 1891476,993 Electric Arc . . . . . . . . . . . . .July 31, 1891484,183 Electrical Depositing Meter. . . . . .July 31, 1891485,840 Bricking Fine Iron Ores. . . . . . . .July 31, 1891493,426 Apparatus for Exhibiting Photographsof Moving Objects. . . . . . . . . . .July 31, 1891509,518 Electric Railway . . . . . . . . . . .July 31, 1891589,168 Kinetographic Camera (reissued September30, 1902, numbered 12,037and 12,038, and January 12, 1904,numbered 12,192) . . . . . . . . . . .July 31, 1891470,929 Magnetic Separator . . . . . . . . . .Aug. 28, 1891471,268 Ore Conveyor and Method of ArrangingOre Thereon. . . . . . . . . . . . . .Aug. 28, 1891472,288 Dust-Proof Bearings for Shafts . . . .Aug. 28, 1891472,752 Dust-Proof Journal Bearings. . . . . .Aug. 28, 1891472,753 Ore-Screening Apparatus. . . . . . . .Aug. 28, 1891474,592 Ore-Conveying Apparatus. . . . . . . .Aug. 28, 1891474,593 Dust-Proof Swivel Shaft Bearing. . . .Aug. 28, 1891498,385 Rollers for Ore-Crushing or OtherMaterial . . . . . . . . . . . . . . .Aug. 28, 1891470,930 Dynamo Electric Machine. . . . . . . . .Oct 8, 1891476,532 Ore-Screening Apparatus. . . . . . . . .Oct 8, 1891491,992 Cut-Out for Incandescent Electric Lamps Nov. 10, 18911892491,993 Stop Device. . . . . . . . . . . . . . April 5 1892564,423 Separating Ores. . . . . . . . . . . .June 2;, 1892485,842 Magnetic Ore Separation. . . . . . . . July 9, 1892485,841 Mechanically Separating Ores . . . . . July 9, 1892513,096 Method of and Apparatus for MixingMaterials. . . . . . . . . . . . . . .Aug. 24, 18921893509,428 Composition Brick and Making Same. . March 15, 1893513,097 Phonograph . . . . . . . . . . . . . . May 22, 1893567,187 Crushing Rolls . . . . . . . . . . . .Dec. 13, 1893602 064 Conveyor . . . . . . . . . . . . . . .Dec. 13, 1893534 206 Filament for Incandescent Lamps. . . .Dec. 15, 18931896865,367 Fluorescent Electric Lamp. . . . . . . May 16, 18961897604.740 Governor for Motors. . . . . . . . . .Jan. 25, 1897607,588 Phonograph . . . . . . . . . . . . . .Jan. 25, 1897637,327 Rolls. . . . . . . . . . . . . . . . . May 14, 1897672,616 Breaking Rock. . . . . . . . . . . . . May 14, 1897675,056 Magnetic Separator . . . . . . . . . . May 14, 1897676,618 Magnetic Separator . . . . . . . . . . May 14, 1897605,475 Drying Apparatus . . . . . . . . . . .June 10, 1897605,668 Mixer. . . . . . . . . . . . . . . . .June 10, 1897667,201 Flight Conveyor. . . . . . . . . . . .June 10, 1897671,314 Lubricating Journal Bearings . . . . .June 10, 1897671,315 Conveyor . . . . . . . . . . . . . . .June 10, 1897675,057 Screening Pulverized Material. . . . .June 10, 18971898713,209 Duplicating Phonograms . . . . . . . .Feb. 21, 1898703,774 Reproducer for Phonographs . . . . . March 21, 1898626,460 Filament for Incandescent Lamps andManufacturing Same . . . . . . . . . .March 29,1898648,933 Dryer. . . . . . . . . . . . . . . . April 11, 1898661,238 Machine for Forming PulverizedMaterial in Briquettes . . . . . . . April 11, 1898674,057 Crushing Rolls . . . . . . . . . . . April 11, 1898703,562 Apparatus for Bricking Pulverized Material April 11, 1898704,010 Apparatus for Concentrating MagneticIron Ores. . . . . . . . . . . . . . April 11, 1898659,389 Electric Meter . . . . . . . . . . . Sept. 19, 18981899648,934 Screening or Sizing Very Fine Materials Feb. 6, 1899663,015 Electric Meter . . . . . . . . . . . . Feb. 6, 1899688,610 Phonographic Recording Apparatus . . .Feb. 10, 1899643,764 Reheating Compressed Air forIndustrial Purposes. . . . . . . . . .Feb. 24, 1899660,293 Electric Meter . . . . . . . . . . . .March 23,1899641,281 Expanding Pulley—Edison and Johnson .March 28,1899727,116 Grinding Rolls . . . . . . . . . . . .June 15, 1899652,457 Phonograph (reissued September 25,1900, numbered 11,857) . . . . . . . Sept. 12, 1899648,935 Apparatus for Duplicating PhonographRecords. . . . . . . . . . . . . . . .Oct. 27, 1899685,911 Apparatus for Reheating CompressedAir for Industrial Purposes. . . . . .Nov. 24, 1899657,922 Apparatus for Reheating CompressedAir for Industrial Purposes. . . . . . Dec. 9, 18991900676,840 Magnetic Separating Apparatus. . . . . Jan. 3, 1900660,845 Apparatus for Sampling, Averaging,Mixing, and Storing Materials in Bulk Jan. 9, 1900662,063 Process of Sampling, Averaging, Mixing,and Storing Materials in Bulk. . . . . Jan. 9, 1900679,500 Apparatus for Screening Fine Materials Jan. 24, 1900671,316 Apparatus for Screening Fine Materials Feb. 23, 1900671,317 Apparatus for Screening Fine Materials March 28, 1900759,356 Burning Portland Cement Clinker, etc April 10, 1900759,357 Apparatus for Burning Portland CementClinker, etc . . . . . . . . . . . . .April 10 1900655,480 Phonographic Reproducing Device. . . .April 30 1900657,527 Making Metallic Phonograph Records . April 30, 1900667,202 Duplicating Phonograph Records . . . April 30, 1900667,662 Duplicating Phonograph Records . . . April 30, 1900713,863 Coating Phonograph Records . . . . . . May IS, 1900676,841 Magnetic Separating Apparatus. . . . . June 11 1900759,358 Magnetic Separating Apparatus. . . . . June 11 1900680,520 Phonograph Records . . . . . . . . . .July 23, 1900672,617 Apparatus for Breaking Rock. . . . . . Aug. 1, 1900676,225 Phonographic Recording Apparatus . . .Aug. 10, 1900703,051 Electric Meter . . . . . . . . . . . Sept. 28, 1900684,204 Reversible Galvanic Battery. . . . . . Oct. IS 1900871,214 Reversible Galvanic Battery. . . . . . Oct. IS 1900704,303 Reversible Galvanic Battery. . . . . .Dec. 22, 19001901700,136 Reversible Galvanic Battery. . . . . . Feb. 18 1901700,137 Reversible Galvanic Battery. . . . . . Feb. 23 1901704,304 Reversible Galvanic Battery. . . . . .Feb. 23, 1901704,305 Reversible Galvanic Battery. . . . . . May 10, 1901678,722 Reversible Galvanic Battery. . . . . .June 17, 1901684,205 Reversible Galvanic Battery. . . . . .June 17, 1901692,507 Reversible Galvanic Battery. . . . . .June 17, 1901701,804 Reversible Galvanic Battery. . . . . .June 17, 1901704,306 Reversible Galvanic Battery. . . . . .June 17, 1901705,829 Reproducer for Sound Records . . . . .Oct. 24, 1901831,606 Sound Recording Apparatus. . . . . . .Oct. 24, 1901827,089 Calcining Furnaces . . . . . . . . . .Dec. 24, 1901