Lampholder

Used in experiments on Hysterisis. Six cups for mercury in bakelite tray. Six terminals for connections & an insulating handle. Maximum current 5 amps. Dimensions 140 x 140 x 80 mm.

A simple demonstration of a Dynamo Model mounted on a wooden base. Hand driven by a gear. Simplified open frame construction which can be readily understood without detriments to its essential similarity to real machine. A 2 pole armature wound by enamelled copper wire to rotate in U shape magnet in pivot. While in rotation process through the gear wheel by hand, the bulb provided glows.