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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 306

An illustration from 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, leaf 306
the comparativelylow specific resistance of this materialthe filaments for 110-volt lamps mustbe long and slender, and this necessitatesa special form of support. Figs. 5, 6,and 7 show some interesting views of the tantalum lamp and thefilament. This lamp is operated at the efficiency of 2 watts… … Fig. 5. Round Bulb TantalumLamp 273 10 ELECTRIC LIGHTING in the first of the tantalum lamps. It should be noted that thelife of this type of lamp on alternating-current circuits is somewhat uncertain; it is much more satis-factory for operation on direct-current circuits. TUNGSTEN VACUUM TYPE Early…

Electrical engineering

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