American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 154
tion on a separate bridge,and beyond the circumference of the balance. Mr. Cumming, in 1766, published a bookon the elements of clock and watchmaking,in which he gave an ingenious, though com-plex method of compensation, differing fromthose preceding him, and depending for itsaction on the… … of his compensation. A is a rim of steel,and eleven small rollers, revolving on pins orstuds, are placed upon this rim; against theserollers rests an interior ring of brass, with itslarger extremity screwed to the plane of thesteel rim. It is clear that the excess of ex-pansibility of the brass rim…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
