U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 245
railways, the closeddial B and pivoted index J, in combination 55with the drum F, provided with the valves w y, the diaphragm H, closing the mouth ofsaid drum, the rod 15, connecting said dia-phragm and index, the lever g, actuated bycontact with the car-wheels, and a connection 60between said rod… … w,
Clocks and watches
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