Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 186
that there is .002 inch clearance between the back stop and the spacer lever. Thisclearance is necessary to insure the stop pawl dropping into the notch in the stationaryrack after the spacer spring has moved the carriage to the right (Fig. 47). Page 13 Section 5-A Adjustments Multiplex System… … Fig. 20
Telegraph
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