American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 155
e space in which the hair-spring vibrated. The amount of flexure ofthe compound bars was adjusted to the con-ditions of momentum by a block which wasadjustable between them, thus limiting theamount of curvature. A compensation similar in effect to theforegoing one by Berthoud, was introducedin comm… … piece to which is attached the compensatingcurb a b, constructed of strips of brass andsteel, the brass interior in each part ; the enda screwed to the arm of the lever D, leavingthe end b free to approach or recede fromthe outer coil of the hair-spring. As thetemperature is increased, the interior…
Clocks and watches
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