U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 343
nism and the camarranged to present its edge to the said pin,a spring for moving the said combined cam,cone, and wheel toward the said pin, and alifting-lever engaged with the said cone, sub-stantially as described. In testimony whereof I have signed thisspecification in the presence of two…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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