Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 342
ily distinguishable, even to a person in a dis-tant part of the room. The circuit arrangement by which a singlepilot lamp is associated with all of the lamps on a position^ and bywhich a single night alarm-bell for the entire central office is associ-ated with all the pilot lamps, is shown in Fig.… … XT CTi=: ^^==^^-1=^ A.N& JACn. MULT JACKS. uine LampS.nELA-r IMD1VIDUAL ToC-ACH LIN El. Af-tFS Its) SlKIAE Poai-rloNiC\^ / ^O PILOT Utt,MPS n L /^ ^ OTHER iSMT /kl^Rm BCLL. A. SW ITChA :=r. ^ =^ COMMON Te,=.l_L_ PIUoT FTG. 267.—WESTERN ELECTRIC LINE AND PILOT CIRCUITS. properly light several of…
Telephone
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