U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 623
mans time recorder a chart print-ing cylinder B rotated in unison with and bya clock, feed wheels IIII journaled over andadapted to convey paper over said cylinder; a spring bearing impression roller D,an ink-ing roller E in combination with punch mech-anism substantially as described aud for… … */l0:<J i/l//:*5.
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-graphophonepaten07unit-193-146.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1007-456.webp)
