Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 50
n the action of the relay by utilizingsome of the energy derived from the regular local current to start the armature in motionwell in advance of the arrival of the incoming line current. 43. The particular function of the accelerating coil is to impart impetus and strengthto the armature movement… … Fig. 8 44. Figures 9-10-11 illustrate by means of the current relations, how the CombinationWheatstone Relay speeds up the circuit in which it is used. In these diagrams, AL,represents the artificial line; AA, the Accelerating Coil; 00, the Opposing Coil; M, themarking contacts; S, the spacing…
Telegraph
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