American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 177
akers fromcopying it, and it never came into general use.Le Roy also tried the compound bars of brassand steel, not to be applied as in Harrisonsmethod, to action upon the hair-spring, but 170 AMERICAN HOROLOGICAL JOURNAL. as a rim to the balance itself. In Fig. 7, Ais the arm or bar of the… … its action he says that, it made a consider-able portion of the circumference to approachthe centre of the balance by an increase oftemperature. In its action he found it tocompare very well with his mercurial one,and it is surprising that he should have ex-pressed his preference for his…
Clocks and watches
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