U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 189
bod-bottom and its supporting-legs, of an inclinedsupport for the legs, a fastening device to holdthe legs to the support, a swinging crank-arm 75adapted to release the fastening device, aswinging lever adapted to strike the crank-arm, and a clockwork mechanism for releas-ing the lever,… … jEfy.it
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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