Miniature Push Buttons
Details of push-button
A very neat and workmanlike push button may be made in the following manner: Procure an unused tan-shoe eyelet with an opening about ³⁄₁₆ in. in diameter, and at the proper point drill a hole into the board in which the button is to be set. Force the eyelet in flush, using a little shellac to hold it in tightly. For the button proper, polish off and round one end of a piece of brass rod of a diameter that will move freely up and down in the eyelet. Solder a small piece of sheet brass across the lower end to keep it from coming out, then adjust and fasten on the two contact pieces, all as indicated in the sketch. The larger piece should be quite springy so as to bring the button back each time. The connections may be made by slipping the wires under the heads of the two wood screws that hold the contact pieces in place.
As every experimenter knows, it is almost impossible to drill a hole in the varnished base of an instrument without leaving a raw edge. Under such circumstances, when it is desired to make an opening for conducting cords, and the like, simply drill a hole with an ordinary drill and then set in a small shoe eyelet, which immediately presents a very finished appearance.
¶Vaseline, with a little powdered gum camphor added and heated over a slow fire, makes an excellent rust preventive for tools.
¶Vaseline, with a little powdered gum camphor added and heated over a slow fire, makes an excellent rust preventive for tools.