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 76
ted by the release relay (back contactopen). The off-normal springs also switch the impulse circuit of thevertical magnet from the winding of the series relay to the main springof the same. But since this relay is energized, the vertical magnet con-tinues to get the impulses. When the impulses… … Ri. Int. StartFig. 60.—Circuit of connector switch. When the subscriber dials the second digit of the call number, theline relay again vibrates, but this time the pulsations act on the rotarymagnet and the rotary relay RotRy in parallel. The rotary magnet ro-tates the wipers over the bank. The line…
Telephone
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