U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 791
(No Model.) No. 498,022. H. H. PATTEE. ELECTRIC CURRENT TIME METER. 3 Sheets—Sheet 2. Patented May 23, 1893. … <on<ciA,(/jf (No Model.; No. 498.022. H. H. PATTEE. ELECTRIC CURRENT TIME METER. 3 Sheets—Sheet 3. :z^yr<5. 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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