U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 789
es of 40longitude on each of said arms, and § pivotedjoint for holding said arms together so thefriction between them will be gtrffieient tohold them one to the other at any point towhich one may be moved on the other *a«d 45permit both to be moved together by turtiiagone, substantially as and for… … (No Model.) No. 498,022. H. H. PATTEE. ELECTRIC CURRENT TIME METER. 3 Sheets—Sheet 2. Patented May 23, 1893.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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