U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 295
gdevice for the armature-lever of the said elec-tro-magnet and comprising a plate adaptedto be actuated by the wheels of the passingtrain, a lever engaging the said armature-le- 40ver, and intermediate mechanism for connect-ing the said second lever to impart a swingingmotion to the latter when the… … /fal ,d*rc-j
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-577-258.webp)
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