U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 57
acket and having itsopposite end reduced from a pointat orabout 90the center of the lever and a rigid reinforc-ing-plate secured to the lever below the re-duced portion and extending parallel there-with to a point slightly below the end of thelever, whereby the lever is formed with two… … 2 Sheets—Sheet 1 J. A. GUINN. RAILWAY TIME SIGNAL. Patented May 17, 1892.
Clocks and watches
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