s no ivory and no platinum. The hourly circuit is notclosed by the current passing through this piece, but it acts 4o8 THE MODERN CLOCK. by bringing the plate contact spring, i6, in metallic connec-tion with the insulated center-winding contact spring, .17,both of which are platinum tipped. It will… … Fis. 140 The operation is as follows: As the train revolves, thepin, 12, securely fastened to the center arbor, in its hourlyrevolution engages a pin on the center winding contactpiece, 13. This piece as it revolves pushes the plate con-tact spring, 16, upward, bringing it in metallic…
Clocks and watches
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