Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 273
simply sends spacing current to the line for that channel until the operatoragain prepares tape for transmission. The tension on the tape is released as the operatoragain starts its preparation, which permits the arm to fall and close the contact. Thede-energization of the relay is thus effected,… … AUTO CONTROL NORMAL-LOCAL IMPULSE. OPER-AL ATES TRANSMITTER MAGNET THRU BOTH WINDINGSOF THE PIFFERENTIAL CONTROL RELAY. NEITHER RELAYNOR AUTO CONTROL MAGNET OPERATE. LETTERESHOWN SET UP IN TRANSMITTER TAPE. FINGER WHEEL PULLEP ANP R ELEASEP.ONE WINPING OF 7IFFEREIMTIAL RELAY OPENEPAT MAIN…
Telegraph
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