THE BOAT-TELEPHONE.Fig. 107.
THE BOAT-TELEPHONE.Fig. 107.
THE BOAT-TELEPHONE.
Fig. 107.
Operator's test:
With the receiver on the hook turn the magneto handle briskly.If the bell does not ring and the magneto turns hard, (1. Short circuit on line) or (3. Short circuit in phone) is indicated, and the operator proceeds as follows, trying to ring after each step:
With the receiver on the hook turn the magneto handle briskly.
If the bell does not ring and the magneto turns hard, (1. Short circuit on line) or (3. Short circuit in phone) is indicated, and the operator proceeds as follows, trying to ring after each step:
COMPOSITE ARTILLERY TELEPHONE.Fig. 108.
COMPOSITE ARTILLERY TELEPHONE.Fig. 108.
COMPOSITE ARTILLERY TELEPHONE.
Fig. 108.
Inspect for contact of lightning-arrester carbons: a piece of writing-paper should pass between them easily. See that the ends of the line and ground wires do not touch any other part after passing through the binding-posts.Disconnect the line and ground wires. If the bell rings now, (1. Short circuit on line) is clearly indicated, but if it does not ring and still turns hard, (3. Short circuit in phone) is indicated.If the handle does not turn hard, the operator takes up (2. Mechanical trouble in the bell) and sees that the striker is not bound by the metallic cap over it or by the wood of the box, also that the armature can be moved by hand and that the striker will touch the gongs when the armature is so moved. The first trouble can be remedied; the others should be reported.(4. Open circuit in the phone). Open the magneto box, see that contact is made between shaft and spring atUand between the springs atVwhen the handle is turned. The last may fail because the shaft is caught at some place, as where it enters the box or the collar on the shaft may have slipped or the springs may be bent. The spring atUmay be held against the end of the shaft with a pencil, during a test, to insure good contact. A spark seen atUorVindicates poor contact. If the operator cannot easily correct these faults, he should report as nearly as practicable what trouble he found.Test for (5. Magneto does not generate) by moistening the tips of the fingers and touch terminals of magneto. Turn the handles, and if no shock is felt, a failure to generate is indicated.
Inspect for contact of lightning-arrester carbons: a piece of writing-paper should pass between them easily. See that the ends of the line and ground wires do not touch any other part after passing through the binding-posts.
Disconnect the line and ground wires. If the bell rings now, (1. Short circuit on line) is clearly indicated, but if it does not ring and still turns hard, (3. Short circuit in phone) is indicated.
If the handle does not turn hard, the operator takes up (2. Mechanical trouble in the bell) and sees that the striker is not bound by the metallic cap over it or by the wood of the box, also that the armature can be moved by hand and that the striker will touch the gongs when the armature is so moved. The first trouble can be remedied; the others should be reported.
(4. Open circuit in the phone). Open the magneto box, see that contact is made between shaft and spring atUand between the springs atVwhen the handle is turned. The last may fail because the shaft is caught at some place, as where it enters the box or the collar on the shaft may have slipped or the springs may be bent. The spring atUmay be held against the end of the shaft with a pencil, during a test, to insure good contact. A spark seen atUorVindicates poor contact. If the operator cannot easily correct these faults, he should report as nearly as practicable what trouble he found.
Test for (5. Magneto does not generate) by moistening the tips of the fingers and touch terminals of magneto. Turn the handles, and if no shock is felt, a failure to generate is indicated.
2d.Bell is not rung by distant magneto.
Analysis:
1. Home phone out of order.2. Distant phone out of order.3. Line out of order.
1. Home phone out of order.
2. Distant phone out of order.
3. Line out of order.
Operator's test:
(a) Test for (1. Home phone out of order) by detaching the line and ground wires and turning the handle.(b) Test for (2. Distant phone out of order)at the distant phone in a manner entirely similar to (1. Home phone out of order).(c) See expert's test for line troubles.
(a) Test for (1. Home phone out of order) by detaching the line and ground wires and turning the handle.
(b) Test for (2. Distant phone out of order)at the distant phone in a manner entirely similar to (1. Home phone out of order).
(c) See expert's test for line troubles.
Can hear but cannot be heard.
Analysis:
1. Local circuit at fault.(a) Battery, (b) connections or wiring, (c) transmitter, (d) primary coil.2. Distant receiver out of order.3. Home secondary coil short-circuited.
1. Local circuit at fault.
(a) Battery, (b) connections or wiring, (c) transmitter, (d) primary coil.
2. Distant receiver out of order.
3. Home secondary coil short-circuited.
Operator's test:
Disconnect line and ground wires and connect binding-postsRandCwith a piece of wire, thus short-circuiting the phone. Place the receiver to the ear and scratch gently with the finger-nail on the inside of the transmitter mouthpiece.If this is distinctly heard, the local circuit and receiver are all right.If no sound results, put the receiver to the ear, lower and raise hook lever, also open and close the two-way switch. If a distinct click is heard for each of these, the local circuit is all right but the transmitter may not be in good order and a report should be made.If no sound results from above, make sure that the switch contact is good and no pivots are loose, that all contacts are good, that the connections at battery terminals are good with no green substance on the wires or posts, that the water in the jars is up to the prescribed point, about an inch from the neck of the cell, that the zincs and carbons are not touching, that the zincs are not eaten off, and that the zinc of one cell is connected to the carbon of the other, and that there are no crystals on the zincs and carbons.The operator should correct any of these that he can, reporting the others.For (2. Distant receiver out of order) the operator at the distant phone should try the tests above. If these give no sound in his receiver, he should try another receiver, if one is available. He may try a new cord or substitute two pieces of wire for it.
Disconnect line and ground wires and connect binding-postsRandCwith a piece of wire, thus short-circuiting the phone. Place the receiver to the ear and scratch gently with the finger-nail on the inside of the transmitter mouthpiece.
If this is distinctly heard, the local circuit and receiver are all right.
If no sound results, put the receiver to the ear, lower and raise hook lever, also open and close the two-way switch. If a distinct click is heard for each of these, the local circuit is all right but the transmitter may not be in good order and a report should be made.
If no sound results from above, make sure that the switch contact is good and no pivots are loose, that all contacts are good, that the connections at battery terminals are good with no green substance on the wires or posts, that the water in the jars is up to the prescribed point, about an inch from the neck of the cell, that the zincs and carbons are not touching, that the zincs are not eaten off, and that the zinc of one cell is connected to the carbon of the other, and that there are no crystals on the zincs and carbons.
The operator should correct any of these that he can, reporting the others.
For (2. Distant receiver out of order) the operator at the distant phone should try the tests above. If these give no sound in his receiver, he should try another receiver, if one is available. He may try a new cord or substitute two pieces of wire for it.
3d.Can neither hear nor be heard.
Analysis:
This indicates general trouble:1. In the phones.2. In the line.
This indicates general trouble:
1. In the phones.
2. In the line.
Operators' test:
Go over the phone carefully, looking for poor contacts, as when an insulated wire is put in the binding-posts, binding-posts not screwed down tight, ends of wires passing through post touching other parts, contacts at cells and condition of cells as noted before. Disconnect the line and ground wires and test out phones as indicated. See that ground wire is in the middle post. If there are fuses in the line, see that they are not burned out. If no trouble is found to exist when the line is disconnected, report line out of order.
Go over the phone carefully, looking for poor contacts, as when an insulated wire is put in the binding-posts, binding-posts not screwed down tight, ends of wires passing through post touching other parts, contacts at cells and condition of cells as noted before. Disconnect the line and ground wires and test out phones as indicated. See that ground wire is in the middle post. If there are fuses in the line, see that they are not burned out. If no trouble is found to exist when the line is disconnected, report line out of order.
Transcriber's NotesObvious errors of punctuation and diacritics repaired.Both "defense" and "defence" are used and have not been changed.Both "guncotton" and "gun-cottom" are used and have not been changed.Hyphen added: hand[-]wheels (p. 8).Hyphen removed: War[-]ships (p. 2).P. viii: 8-inch Non-disappearnig -> 8-inch Non-disappearing.P. 2: first or second-slass gunners -> first or second-class gunners.P. 7: verticle angle -> vertical angle.P. 31: Tetlautograph detail -> Telautograph detail.P. 35: singals "Ready" or "Misfire," -> signals "Ready" or "Misfire,".P. 77: Frankfort Arsenal -> Frankford Arsenal.P. 89: right-handed sope -> right-handed rope.P. 101: each pir of front and rear stakes -> each pair of front and rear stakes.P. 110: Thong and Bush -> Thong and Brush.P. 123: EXAGERATED DIAGRAMS -> EXAGGERATED DIAGRAMS.P. 144: on dial -> on the dial.P. 148, table, last column: 6 1 -> 6 1/5.P. 156: TABLE A.--TABLE OF WARSHIP CHARACTERISTICS was split in two to fit within a reasonable width.P. 160: (See Armor-attack Sheet, Fig. 86.) -> (See Armor-attack Sheet, Fig. 87.)P. 168: 36 Imperieuse (34B Warspite) -> 36 Imperieuse (36B Warspite).P. 184: 2 alochol lamps -> 2 alcohol lamps.P. 187: free fram any clogging material -> free from any clogging material.
Obvious errors of punctuation and diacritics repaired.
Both "defense" and "defence" are used and have not been changed.
Both "guncotton" and "gun-cottom" are used and have not been changed.
Hyphen added: hand[-]wheels (p. 8).
Hyphen removed: War[-]ships (p. 2).
P. viii: 8-inch Non-disappearnig -> 8-inch Non-disappearing.
P. 2: first or second-slass gunners -> first or second-class gunners.
P. 7: verticle angle -> vertical angle.
P. 31: Tetlautograph detail -> Telautograph detail.
P. 35: singals "Ready" or "Misfire," -> signals "Ready" or "Misfire,".
P. 77: Frankfort Arsenal -> Frankford Arsenal.
P. 89: right-handed sope -> right-handed rope.
P. 101: each pir of front and rear stakes -> each pair of front and rear stakes.
P. 110: Thong and Bush -> Thong and Brush.
P. 123: EXAGERATED DIAGRAMS -> EXAGGERATED DIAGRAMS.
P. 144: on dial -> on the dial.
P. 148, table, last column: 6 1 -> 6 1/5.
P. 160: (See Armor-attack Sheet, Fig. 86.) -> (See Armor-attack Sheet, Fig. 87.)
P. 168: 36 Imperieuse (34B Warspite) -> 36 Imperieuse (36B Warspite).
P. 184: 2 alochol lamps -> 2 alcohol lamps.
P. 187: free fram any clogging material -> free from any clogging material.