Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 165
ery time the selec-tor drum operates. The functions performed by this switch have already been described.The six other levers are function levers. When the selector drum moves forward, theselevers drop onto the periphery of the interference plates (Fig. 6) and, depending on whatfunction has been… … Fig. 17 29. If for instance the line feed function had been selected, the notches would belined up under this lever and when the drum moved forward this lever would fall into theslot thus formed, thereby permitting the line feed contact to close. Battery would thenflow from the left hand tongue of…
Telegraph
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