| 摘要 |
A device for automatically controlling the elastic energy of a coiled spring when an operation lever pivotally supported by a shaft and normally urged in one direction by one end of the coiled spring is caused to move in the other direction against the biasing force of the spring. The device comprises means to relieve the other end of the coiled spring when the operation lever is moved in the other direction as aforementioned so as to thereby restrict an increase in the elastic energy of the coiled spring.
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