Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 17
T ML=LINE WIRE! =1550 V W -®-> 80 V. GENERATOR Fig. … 80V.GENERATOR Both currents are in the same direction, and therefore assist each other in pulling overthe relay armature to its marking position with a force corresponding to that obtainableby sending 30 milliamperes through either winding alone. Similarly, signals sent on thedistant key would…
Telegraph
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
