| 摘要 |
1,086,514. Safety harnesses. H. I. R. KARLSSON. Sept. 11, 1964 [Sept. 13, 1963], No. 37371/64. Heading A3V. A retractable safety belt is arrested at a predetermined rate of withdrawal of the belt by the displacement of an inertia nut on a threaded end of a spindle. The belt spindle 15 has a threaded end portion 16 which carries the inertia nut 17 which rotates with the spindle. A cylindrical housing 10 supporting the spindle also supports a pendulum 31 which, when the vehicle decelerates, swings to bring an end portion 32 of the pendulum into engagement with teeth 28 on the upper surface of the nut 17 thus arresting the nut. The continual rotation of the spindle causes movement of the nut along the threaded portion overriding the portion 32 and bringing the teeth 28 into mesh with teeth 29 on the end cap 11 of the housing. The spindle is thereby arrested and the belt cannot be withdrawn. Manual control of the pendulum is provided by an arm 35 pivoting on the pendulum pivot and having an arcuate member 36 which can be moved to hold the pendulum in an active or inactive position. In the latter position the nut is displaceable by its inertia. A Bowden cable may control the arm remotely. In a modification the nut engages the spindle with play so that on deceleration of the vehicle the nut is arrested by engaging the side of the housing 10 which has a pivoted lever which engages teeth on the periphery of the nut. In another modification when the vehicle decelerates a sliding member overcomes the action of a spring to move it to engage teeth on the periphery of the nut. |
