| 摘要 |
A balance wheel assembly for clock works, and the like, the assembly including a base plate, lower and upper pivot blocks mounted on the base plate, the pivot blocks having opposed conical recesses therein, a vertical shaft pointed at either end disposed in the recesses, a balance wheel fixed to the shaft, and a magnet proximate the upper pivot block and operative to urge the shaft toward the upper pivot block against gravitational pull.
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