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 70
wipers, and which canbe raised step-by-step by a pawl and ratchet movement operated by thevertical magnet, and can be rotated step-by-step through about 120degrees by another pawl and ratchet movement operated by the rotarymagnet. The vertical movement is opposed by gravity and the rotarymovement… … Fig. 50.—Connector switch. .-.I A I TO MA TIC TELEPHONY tion occurs, the release armature pushes the double dog out of engagementwith the shaft and into engagement with a catch called the release link,which holds it until another call is initiated. When the double dogdisengages it, the shaft…
Telephone
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