National Telegraphic Union · New York : N.T.U. · leaf 313
be strongly attracted towards m by the permanentmagnetism of the cores. The retracting springs s s areadjusted to a tension just sufficient to allow the armatureto be drawn forward towards the cores of the magnetwhen the main circuits are open. If we suppose the holding force of the… … « « » » EDISONS COMBINATION REPEATER. Ik repeating the rapid vibrations of the combinationprinting instrument from one circuit to another, it is ofthe utmost importance that there should be the least pos-sible loss of time in the transmission of each signal. Therepeaters in general use on the Morse…
Telegraph
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