| 摘要 |
<p>An automobile seat belt has a security release mechanism producing automatic opening of the belt after a given delay following an impact. Ends of the belt carry an attachment locked in a slot by two balls held in an opening of the attachment by retractable pins. Retraction of the pins to free the balls and hence the belt is controlled by a clockwork triggered by a spring when the belt tension exceeds a given value.</p> |
