. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Fi<;. —Rinsing conditions. During conversation the existing circuits are as shown in Fig. calling subscriber draws current through two relays in the primaryselector. The called subscriber is supplied with current from two relaysin the connector. The cut-off relay of each line is energized by currentfrom the sleeve line. I Primary First , . I Selector Selector I Line w;j VJ3 SecondSelector I wjuo Connector W*I7 Line. ,WS-700 M^, ^JyFrequenct/^&AS~r Selector 3M 12 3 Release Mog forConnector
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Fi<;. —Rinsing conditions. During conversation the existing circuits are as shown in Fig. calling subscriber draws current through two relays in the primaryselector. The called subscriber is supplied with current from two relaysin the connector. The cut-off relay of each line is energized by currentfrom the sleeve line. I Primary First , . I Selector Selector I Line w;j VJ3 SecondSelector I wjuo Connector W*I7 Line. ,WS-700 M^, ^JyFrequenct/^&AS~r Selector 3M 12 3 Release Mog forConnector r fr Fig. 231.—Talking connection tetween stations. The release magnets of the primary selector, first selector and secondselector, are in one common circuit, broken only at contact of the relay/?-14, which will be closed whenever the calling subscriber hangs up hisreceiver. The release circuit of the connector is complicated by being linked inwith the release of the frequency selector to secure slow release. If the 270 AUTOMATIC TELEPHONY called subscriber accidentally opens the circuit of his telephone by unin-tentional movements of the hook switch, his tip relay 22-25 will momen-tarily close the contact marked R-2o in the circuit of the rotary magnetM-ll of the frequency selector. This connects the impulse machine / tothe rotary magnet Af-11 and, if the circuit should be closed long enough,would drive the wipers of the frequency selector on around the circle tonormal. Momentary movements of the hook swi
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
