American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 162
ap-pens that by reason of these same curves, the term neglected in the second member ofequation (3) becomes, if it may be so. ex-pressed, a quantity infinitely small of thesecond order, on the one side because thecomponents X and Y are infinitely small, andfurther because the same is true with… … of which A is the end fastened, and let ABCrepresent the other curve, of which the endA is fastened in the collet. The figure sup-poses the state of the hair-spring as it isbefore any deformation takes place. LetCOC=,3, (3 being any angle whatever. Wecan look upon the hair-spring as forming…
Clocks and watches
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