Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 51
Fig. 9 46. When the distant transmitter reverses the direction of main line current, therejisnecessarily an interval during which the main line is entirely cut off from a source ofcurrent. During this period the main line current falls in value until the local currentflowing through the opposing… … Fig. 10 47. At this instant the current conditions shown in Figure 10 are brought about.The condenser C discharges through the Accelerating Coil over the path shown by thefeathered arrows, causing this winding to throw the armature of the relay with con-siderable force toward the Spacing contact.…
Telegraph
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