American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 219
ers a larger scope foroperation than the Breguet spring. Both,however, have the important advantage in com- 210 AMERICAN HOROLOGICAL JOURNAL. mon, that they emancipate the balance from theside pressure of the pivots in their holes. The outer end being fixed within the circleof the spring, and the… … balance is moved, while when the extreme endof the last circular coil is fixed the expansionand contraction is one-sided, causing a sidepressure in their holes ; we can therefore, witha Breguet or cylindrical spring, obtain agreater arc of vibration with a smaller amountof motive force. In the case…
Clocks and watches
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