Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 175
igure 24, are as follows: Fourth pulse relay ZYi ounces Sixth pulse relay 2x/i ounces Cut-out relay 33^ ounces Main break relay 53^2 ounces Print relay 2>Yi ounces 8. Relay Contact Gap. With the relay in its normal position, the front contact screws shall be turned in until they come within .004…
Telegraph
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