Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 113
be slow in returning and perhaps will not haveforce enough to knock the pawl out of the notch in the release rod. To insert an indicatorwatch spring, remove the spring disc and the-large gear and attach the inner end of thespring to the spring post of the gear and the outer end to the spring post… … ONE HALF TURN EXCESSAFTER CONTACTSHAVE JUST TOUCMEP Fig. 16 14. Lamp Contacts. The indicator lamp should light on the sixty-fifth characterperforated. To test this, strike the carriage return key in order to make sure that the in-dicator gear is in its initial position, then depress a key…
Telegraph
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