U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 207
-lated face of the circuit-closer, in combinationwith a contact-spridg having an end k adapt-ed to firmly engage said notch, whereby per-fect con tact,4s secured and the movement of 95the circuit-closer retarded. In testimony whereof we affix oujr signaturesin presence of two witnesses. MALCOLM…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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