U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 80
and a time-stamp inclosed in said case,and an operating-handle for the platen of saidtime-stamp outside of the case and independ-ent of the handle by which the feed-shaft isoperated, substantially as described. In testimony whereof I have signed my name to this specification in the presence oftwo…
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-789-358.webp)
