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 83
ergized one of thewindings fails, the armature will be released. The switch is seized in the usual way, the line relay and the releaserelay pulling up and grounding the release trunk. The group of lineimpulses cause the line relay to vibrate, during which time the verticalmagnet lifts the shaft and… … Fig. 64.—Circuit of 10-levcl 20-trunk selector. The rotary-interrupter relay prepares a circuit for the rotary magnet,which is yet open at the contacts of the series relay. When the group of impulses comes to an end, the line relay stops inan energized condition, the release relay as well. Then the…
Telephone
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-510-268.webp)
