Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances (1918)
Keene, E. S. (Edward Spencer), b. 1864 · New York, McGraw-Hill book company, inc.; · leaf 392
(e) W^ (f) Fig. 270.— Local wall switches. receptacle with plug and spare pilot lamp. Figs. 268,a, b, c andd, represent various forms from which selection may be made.All are adapted for the same purpose and differ only in mechan-ical arrangement. ELECTRICITY 381 Service Switch.—The service… … (a) (b) Fig. 271.—Pilot lights.
Heating · Lighting · Plumbing
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