Incandescent Lamp

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Incandescent bulbs are made in a wide range of sizes and voltages, from 1.5 volts to about 300 volts. They require no external regulating equipment and have a low manufacturing cost, and work well on either alternating current or direct current.

Keywords

lighthouse, lamp, sign, lantern, beam, alert, rocket, Watchtower, alarm, warning signal, balefire, bonfire, flare, guidepost, heliograph, lodestar, pharos, radar, signal fire, smoke signal

Galleries

Lamps

Source

Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)

Downloads

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