Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 266
duiton Fig. 434.—Bells operated with a doublepush (see Fig. 432). Bells can be rungindividually or together with a masterpush button. … Fig. 435.—Double-contactpush button. 252 WIRING ^DIAGRAMS OF ELECTRICAL APPARATUS hell , ruT o i oio indicatoT Fig. 436. IM [ pus?? duitorj I ^ 4 \door^ope7?er m- Fig. 437. Fig. 436.—Wiring for bell and indicator with several pushes. Fig. 437.—Bell wiring for apartment houses. Bells are rung from…
Electric wiring
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