| 摘要 |
An anti-theft cap for a screwthreaded base. Said cap comprises a plate provided with a tapped aperture complementary to the screwthread of the base, a body journalled on said plate and in which body a lock is mounted. Said lock comprises a catch which, for one position of the lock, is at a distance from the axis of the cap equal to that of a stop integral with said plate, and, for at least one other position of the lock, is at a different distance. Said stop is elastically movable and adapted to move under the action of the catch when the screwing torque transmitted by said catch exceeds a given value.
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