The Watch-Light is in many ways similar to the clock light just described—but is smaller. It consists of a box just large enough to receive a three-cell flashlight battery. A piece of brass rod is bent into the form of a hook or crane from which to suspend the watch.
Fig. 299.—A Watch-Light.
The light is supplied by a three-and-one-half-volt tungsten flashlight bulb mounted on the top of the box in front of the watch. If desirable, the light may be fitted with a small shade or reflector so that it shines only on the dial and not in the eyes. The figures on the face of the timepiece can then be seen much more plainly.
The lamp is mounted in a small wooden socket or a pin-socket passing through a hole in the top of the box, so that the wires are concealed. A small push-button is located in one of the forward corners of the box, so that when it is pressed the lamp will light. Two small binding-posts mounted at the lower right-hand corner of the box are connected directly across the terminals of the switch, so that a flexible wire and a push-button can be connected, and the light operated from a distance.
An Electric Scarf-Pin can be made by almost any boy who is skillful with a pocket-knife. The material from which the pin is made may be a piece of bone, ivory, or meerschaum. It is carved into shape with the sharp point of a penknife and may be made to represent a skull, dog’s head, an owl, or some other simple figure. The inside is hollowed out to receive a "pea" lamp. Pea lamps with a cord and a plug attached as shown in Figure 300 may be purchased from almost any electrical supply house. The lamp is a miniature carbon bulb about one-eighth of an inch in diameter. The eyes, nose, and mouth of the figure are pierced with small holes, so that when the lamp is lighted the light will show through the holes. The figure should be carved down thin enough to be translucent and light up nicely.
Fig. 300.—A "Pea" Lamp attached to a Flexible Wire and a Plug.
A large pin is cemented or otherwise fastened to the back of the figure so that it can be placed on the necktie or the lapel of the coat. The lamp is removed from the socket of an electric flashlight and the plug attached to the pea lamp screwed into its place. The pea lamp is inserted inside the figure and bound in place with some silk thread. Then when the button is pressed on the flashlight case, the pin will light up and tiny beams of light will shoot out from the eyes, nose, and mouth of the figure.
