Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 125
ked, so to speak, by the vertical arm of the stunt bar whichis in the selected slot. 23. The circuit established through the overlap relay causes this relay to operate,but the retardation coil in series with this relay purposely delays its action to permit theoperation of some of the other… … Page 7 Section 5 Multiplex System 263-C MOUNTING SCRLWS
Telegraph
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