American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 262
in thediscussion. Suppose we take in the first in-stance a flat spring with a terminal curvewhere it enters the collet. The spring is pin-ned to the hair-spring stud at just its semi-diameter, and it is evident that if it has beenadjusted so as to be central for a given vibra-tion, any increase in… … The great trouble with the common springis the distance of the centre of the arbor fromone of the connecting points, obliging thebody of the spring to throw itself suddenly toone side, thus producing a distorted formwhich hinders the development of isochronism.This can be remedied by fastening this…
Clocks and watches
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