Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 86
cations 263-C SPECIFICATIONS INCLUDED: None.PHOTOGRAPHS AND DRAWINGS: e No. Drawing No. Title 1 Photograph Perforator 1-A. 2 4583- -1 Keyboard Layout. 3 22354- -2 Key Levers and Selecting Mechanism. 4 22312- -1 Specimen of Perforator Tape. 5 22.355- -1 Punch Block. 6 22356- -1 Punching. 7 4570- -1… … Page 1 Section 4 Multiplex System 263-C MULTIPLEX PERFORATOR 1-A 1. Keyboard perforator 1-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:…
Telegraph
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