American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 154
e two acting ends of the leversbeing adjusted to the proper quantity of mo-tion by the screw d, which carries the studabout which the lever a revolves. More frequent mention is made of the nameof Berthoud than of any other in the accountsof these early researches in compensation ;he seems to have… … cock, B a plain balance, C the balance spring,D an arch of brass, with its ends resting innotches in the steel bar E, fixed by a screwto the plate of the watch, and yet capable ofmoving slightly upon it; F the hair-springstud ; G, g, a bent lever, with a pin in itsshort end g, its long end resting…
Clocks and watches
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