Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 384
ead isruptured, and an arc follows. The direct-current lamp issupplied with two terminals andis started in the same way. When a quartz tube is usedinstead of a glass tube, thelamp may be shortened, and runat a higher temperature with ahigher efficiency. 390. Shades and Reflectors.—The light… … D FocusingReflector Fig. 430.—Light distribution ofa 32 candle-power tungsten lampequipped with different reflectors. 360 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap, xlii different types of reflectors are used. Curve B is obtained withwhat is called an extensive reflector, curve C with an…
Electrical engineering
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