American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 162
the hair-spring vary during itsdeformation. The principle of this deforma-tion (Fig. 3) will illustrate where the whitecircle represents the coils of the spring intheir state of equilibrium, and the dottedones the position of the same after thedeformation has taken place—all concentringat the… … of the tvoi^ xido uii>co\erea mo j_uo^us of caus-ing the hair-spring to vibrate according tothis law, and these means consist in certainfixed terminal curves, according to which theends of the hair-spring must be shaped. Wewill not occupy ourselves with the translationof all the mathematical…
Clocks and watches
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