Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 291
d of the tines. 12. Having properly placed the weights in this position, the 110 volt local and the linepotential switches in the distributor terminal box are closed. After turning on the switchin the base of the fork the fork is started by pinching the tines together and releasingthem. Next the…
Telegraph
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