| 摘要 |
A variety of belt locking mechanisms are disclosed, each utilizing a first mechanism responsive to sudden tensioning in the belt to lock it against further withdrawal, and a second involving a pendulum mechanism responsive to sudden changes in vehicle speed to lock the belt. Each belt tensioning device includes a reciprocable pin or shaft reponsive to increased belt tension to shift in a direction in which it causes a locking lever to engage lockingly with the teeth on a cogwheel which rotates with the spindle on which the belt is wound. The locking lever may be held against the resistance of a spring in its released position by a pendulum-type mechanism which moves in response to sudden changes in vehicle speed to release and allow the latch to pivot to its locking position. Alternatively, the motion-responsive pendulum or mechanism, or a similar mechanism, will operate a second cogwheel frictionally coupled to the first-mentioned cogwheel, to increase belt tension and lock the belt through the belt-tensioning device proper.
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