Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 304
ould always be renewed at the end of their useful life—this point being termed the smashing point—as it is cheaper toreplace the lamp than to run it at the reduced candle-power. Somerecommend running these lamps at a higher voltage, but that meansat a reduced life, and it is not good practice to do… … 200 300 400 HOURSFig. 4. Life Curves of Carbon Incandescent Lamps a period during which the value is fairly constant, after which thefight given by the lamp is gradually reduced to about 80 per centof the initial candle-power. GEM METALLIZED FILAMENT TYPENature of Improvement. When the incandescent…
Electrical engineering
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