Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 240
all pull bars, includingthe selected bar. As the restoring lever rises, it withdraws the pull bar restoring latchfrom the catch on the selector bar return latch lever. When this is done the selector barreturn latch lever rotates in a counter-clockwise direction under the action of its springand in… … If) z> ;: yz , o Zr -^ q o 0) CO o r hj 10 k>g <\J O (M
Telegraph
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