Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 252
g the pins on the reverse barwill bear on and throw the original set of pawls out of contact with their ratchet. Theopposite set of pawls will be released from the pins on the reversing bar and will bearon the rim of their ratchet. Hence the direction of feed will be reversed and succeedingstrokes… … Page 20 Section 5-C Multiplex System 263-C
Telegraph
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