Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 158
uj 1 T— ,- : iZZ 2 i?i-oKCks uJuJ uJ^O COXX It ■* < DC tJO Page 5 Section 5-A Multiplex System 263-C … Page 6 Section 5-A Multiplex System 263-C thus determines which way the rotator shaft will move. However, the rotator magnetsthus energized cannot rotate the rotator shaft because it is held in a locked position untilthe selector drum has completed its travel, unlocking it and permitting rotation.…
Telegraph
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