Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 103
LOOP #5LOOP***LOOP*3LOOP#2LOOP* I … F/g. 4 Page 3 Section 4-A Multiplex System 263-C operate. The power loop is operated whenever any key is depressed. The six loopshave extensions which project through the base of the perforator and engage bell crankswhich are pivoted about a common vertical post. Five of these bell cranks in turn…
Telegraph
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