Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 731
e magnetis attracted the arm, 22, tends to move toward the left, but is heldby a notch in the spring lying just under this arm, and is only re-leased therefrom when the private magnet armature is released.The arm, 22, is then engaged by the second notch on the privatemagnet armature, the side… … 710 AMERICAN TELEPHONE PRACTICE. ture will result in the moving of the side switch to its third position. This action of the side switch, and its control by the private mag-net, is one of the salient features in the operation, not only of thefirst selectors, but of the second selectors and…
Telephone
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