U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 241
de- • •vice for establishing alternately-reversed cur-rents in a circuit including said coil. 55 14. The combination, with a time-train, in-dex, and dial, a magnet A,andcoilH,vibrat-ing on an axial pivot in the field of said mag-net, of a toothed wheel O, geared with saidtime-train, and an anchor N…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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