Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 100
rforator 13 22408- -1 Perforator 14 22409- -1 Perforator 15 22359- -1 Method of 16 22410- -1 Perforator 17 • 22411- -1 Perforator Title2-A 2-A Keyboard Layout.2-A Loops. 2-A Punching Mechanism.2-A Punch Hammer and Bars.2-A Specimen of Tape.2-A Punch Block.2-A Tape Feed Mechanism.2-A Back Spacing… … 1 Section 4-A Multiplex System 263-C MULTIPLEX PERFORATOR 2-A 1. Keyboard Perforator 2-A is a device controlled by a typewriter keyboard forperforating holes in a paper tape to form the characters representing in the Multiplexalphabet the message to be transmitted. 2. Its essential parts are: (a) A…
Telegraph
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