| 摘要 |
A speed governor comprises a speed increasing wheel train and an electroconductive plate confronting a magnet, the electroconductive plate integrally formed with the final stage of the speed increasing wheel train, a disk-like yoke, a cup-like yoke, abutted against the disk-like yoke, enclosing the electroconductive plate, a magnet fixed on one of the disk-like yoke and the cup-like yoke, and a plurality of inclined surfaces formed on a circumferential end surface of the cup-like yoke, each of the plurality of inclined surfaces identical with each other, each of the plurality of inclined surfaces abutted against a projection of the disk-like yoke whereby one of the disk-like yoke and the cup-like yoke can be moved in a circumferential direction.
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