Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 23
re represents the sending station, the right hand figure the receiv-ing station. At each end is shown a distributor consisting of two concentric metallicrings, which are insulated from each other, the outer one being divided into six segments,which also are insulated from each other. Brush arms… … RECEIVINGPISTRIBUTOR BRUSH INSULATOR ■t 2f 3t 4t. rf KEYS GENERATOR
Telegraph
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