Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 501
made to turn the counter back,but the equivalent result is accomplished by so arranging the mech-anism that the register will not record a count when the subscribermakes his next call. In other words, after an unsuccessful call, thesubscriber is entitled to a free call. In order to satisfy the… … FIG, 349.—STROUD CREDITING METER. •suit of his last call having been unsuccessful. This free call attach-ment is, of course, controlled by a key in the cord circuit at the■central office, used only by the operator in the case of an unsuccess-ful call. Several methods of operating meters at the…
Telephone
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