Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 120
s, or slots, in its periphery,so mounted as to have a limited motion about a hollow drum or shaft. 6. The motion of the discs is controlled by five selecting magnets, one for each unitof the code. These in turn are operated by the selecting relays which receive the lineimpulses from the… … Fig. 2 7. The notches in the discs are so located with respect to each other that for everysetting of the discs, whether they are all against their back stops, or whether one or moreare moved against their forward limiting stops, five slots or notches line up vertically atone or, in some cases, two…
Telegraph
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