| 摘要 |
PCT No. PCT/AU84/00213 Sec. 371 Date Jun. 10, 1985 Sec. 102(e) Date Jun. 10, 1985 PCT Filed Oct. 19, 1984 PCT Pub. No. WO85/01771 PCT Pub. Date Apr. 25, 1985.A latch lock comprising a latch bolt adapted for movement between a latching and a retracted position, a first part including a boss adapted to be rotated by a door handle, and a second part adapted to move the latch bolt between these positions. A clutch is provided for transmitting rotation of the first part by the door handle to the second part to move the latch bolt to the retracted position when engaged and for freely rotating the first part by the door handle when disengaged. The clutch comprises a lever pivotally connected to the second part and the lever is provided with a spur which can be engaged by pivotal movement of the lever with a recess in the boss of the first part. The lever is biased toward engagement of the spur and recess and is operated to disengage the first and second parts by a locking device. In the locked configuration, the locking device can also operate to prevent movement of the latch bolt by abutment with the second part.
|
