Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 409
rding action of this spring. The spring b, how-ever, is the strongest of the group in its upward tendency, and whenrelieved of pressure from the button, K, engages with the upwardlybent portion of the spring c, and serves to drag it back to its normalposition against the retarding influence of the… … FIG. 30O.-DETAIL OF SUBSCRIBERS SIGNALING APPARATUS. subsequent release of the button, K, is as follows: First, the makingof contacts between the springs d and e; second, the making of con-tacts between springs / and g; then, as the button rises, first, themaking of the contacts between the springs…
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