U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 53
m on the tubular arbor, a wheel fixedon the split-seconds-hand arbor, a heart-cam lever pivoted on said wheel, and means forbringing said lever out of contact with saidheart-cam on the tubular arbor, substantially 15as set forth. In testimony that I claim the foregoing asmj7 invention I have signed… … a, T,$.3 1—j J- at >c Ti#.4< fjv «r —r-■b III 011° l~ a> \ Fvq.tS .III ,lll S^ If L ^Fia. 2
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1149-511.webp)
