Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 240
+ … Page 8 Section 5-C Multiplex System 263-C 18. The opening of the printing contacts de-energizes the printing solenoid, theprinting plunger therefore falls and, aided by the printing lever arm spring, restores theprinting train to its normal position. When this operation is completed the entire…
Telegraph
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