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1. 发明授权

US4109496A Trapped key mechanism 失效
标题翻译：被困的关键机制
公开(公告)号：US4109496A
公开(公告)日：1978-08-29
申请号：US862558
申请日：1977-12-20
申请人： James G. Allemann , Michael W. Grey
发明人： James G. Allemann , Michael W. Grey
IPC分类号： E05B11/00
CPC分类号： E05B11/00 , Y10S70/60 , Y10T70/7712 , Y10T70/7768
摘要： A security type dead bolt for a door is arranged so that a key must be used on the inside, as well as on the outside, to extend the dead bolt to locked position, in that way to prevent an unauthorized person opening the door from the inside after surreptitious entry. To make certain that when the occupant is at home and with the latch bolt extended by the inside key to locked position, there can be no lost key situation blocking exit by the occupant in case of an emergency such as a fire, the dead bolt mechanism is arranged to trap the key in the lock whenever the dead bolt is extended to locked position, but to release the key when withdrawn. A yieldable mechanism permits unlocking the latch bolt from the outside even when a key is left in the lock on the inside.
摘要翻译：用于门的安全型止动螺栓布置成使得在内部和外部必须使用钥匙以将死栓延伸到锁定位置，以防止未经授权的人从门打开门内部偷偷进入。为了确保当乘客在家中并且闩锁由内侧钥匙延伸到锁定位置时，在诸如火灾的紧急情况下，乘客不会丢失关键情况，阻止出口，死栓机构被设置为在锁定螺栓延伸到锁定位置时将钥匙锁定在锁中，但是在撤回时释放钥匙。即使当钥匙留在内侧的锁中时，可屈服机构也允许将闩锁从外部解锁。

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