| 摘要 |
<p>An anti-tampering self-blocking device for spring latch or hook locks according to the present invention, comprising: - a first means, operated by means for the control of locks like handles, knobs, keys, latches or the combination of them all, which may perform two movements, one for opening the spring latchs and the hooks and one opposite to the same; - a second means which may assume two positions, one for blocking the spring latchs or hooks and one for releasing the spring latchs or hooks; - a third means which may assume two positions, one for blocking the second means and one for releasing the second means.</p> |
