Control apparatus for an intermittently rotated indexed wheel |
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| 申请号 | US44479374 | 申请日 | 1974-02-22 | 公开(公告)号 | US3887825A | 公开(公告)日 | 1975-06-03 |
| 申请人 | SEIKOSHA KK; | 发明人 | KUMAZAWA SHOICHIRO; | ||||
| 摘要 | A driven or indexed wheel for a timepiece driven step-by-step by a balance staff of a timepiece. A rockably supported level has a pawl thereon resiliently biased rotationally by a free end of a spring lever to engage peripheral teeth on a lock wheel that is fixed to the wheel driven stepwise. The force applied by the spring lever can be varied while maintaining precise positioning of the indexed wheel as it steps rotationally. | ||||||
| 权利要求 | 1.In combination, a driven wheel driven stepwise, means to insure said wheel is driven precise angular increments comprising a toothed lock wheel having peripheral teeth and driven synchronously with said driven wheel and fixed thereto, a lock lever rockably supported on its center of gravity and having a pawl engaging the teeth of said lock wheel to control the incremental rotation of said lock wheel and said wheel driven stepwise, said lock lever having plurality of balancing arms insuring its balance on its center of gravity means supporting said lock lever at its center of gravity, a lever spring having a free end applying a rotational force to said lock lever to resiliently apply said pawl into engagement with said teeth of the lock wheel , and a turnable collet holding another end portion of said lever spring for variably controlling the pressure said lever spring applies against said lock lever. 1.In combination, a driven wheel driven stepwise, means to insure said wheel is driven precise angular increments comprising a toothed lock wheel having peripheral teeth and driven synchronously with said driven wheel and fixed thereto, a lock lever rockably supported on its center of gravity and having a pawl engaging the teeth of said lock wheel to control the incremental rotation of said lock wheel and said wheel driven stepwise, said lock lever having plurality of balancing arms insuring its balance on its center of gravity means supporting said lock lever at its center of gravity, a lever spring having a free end applying a rotational force to said lock lever to resiliently apply said pawl into engagement with said teeth of the lock wheel , and a turnable collet holding another end portion of said lever spring for variably controlling the pressure said lever spring applies against said lock lever. |
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