U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 100
rod i,the latter being provided with insulating ma-terial upon its outer end, whereby the rotation 40of said disk may tend to maintain said rodnormally in circuit with the battery, substan-tially as specified. In testimony whereof I have signed thisspecification, in the presence of two subscrib-… … JFiQ Z. *ioJ.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
