Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 170
other, CR, is used forthe bell, and for party lines using harmonicsignalling has 0.7-m.f. capacitance. Thereare three shunt springs, S, on the callingdevice, it being necessary to short circuitthe transmitter and the receiver separately.Dialing occurs through the 3-4 winding ofthe induction coil… … 154 A UTOMA TIC TELEPHON Y the same for both wall and desk sets. The same condenser is used fortalking and ringing. There are three shunt springs on the calling device.When the shunt operates, it opens the receiver circuit and short circuitsthe transmitter. Dialing is done through the 1-2 winding…
Telephone
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