The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 488
o battery and the double contactplate to a plug switch for connection to cable, standard con-denser, or standard resistance. The handles are moved to theleft to charge, and to the right to discharge; and a small rod ofebonite fitted in one of the handles enables both to be movedtogether, and keeps… … Fig. 436.—Connections for Capacity Constant the Kempe. The battery is connected to the bottom contact of the discharge key through the battery reverser. The lever of the discharge key connected to one terminal of the condenser is pressed down, and the condenser thereby charged. After about 15…
Telephone
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