| 摘要 |
A lock comprising a housing having a push latch bar and a deadbolt which are each extendible and fully withdrawable into the housing. The dead bolt is actuated to the two positions by an over-center spring and a lever having a relatively long arm and a relatively short arm. The short arm includes a cam follower. The lever is actuated by a cam which is turned by a key. A detent notch in one edge of the dead bolt cooperates with a locking lever pivotally mounted within the housing for actuation by the cam. The push latch bar comprises a head and tail of similar thickness but different width, joined by a body having a width similar to that of the head but a thickness less than that of the head or the tail, forming opposed shoulders on the head and the tail. A pusher bar is urged by a spring against the shoulder formed by the head. A second lever pushes against the shoulder formed by the tail to the push latch bar. The push latch may be reversed so that the door can swing in either direction.
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