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(11) | EP 1 106 757 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Manually operated locking mechanism |
| (57) A manually operated locking mechanism (10) for a closure member, such as an openable
door or window, said mechanism being adapted to be mounted in a closing face of the
closure member and comprising: a housing (11); a deadbolt (12) mounted in the housing
(11) for movement between a withdrawn position within the housing and a projecting
locking position; a manually operable actuator element mounted on the housing (11)
for movement from a datum position in a locking direction or an opposite unlocking
direction in order respectively to lock and unlock the mechanism (10); an actuating
mechanism (20) in the housing (11) which is engageable with the deadbolt (12) in order
to displace the deadbolt to the locking position when the actuator element is moved
in the locking direction; a tumbler (13) mounted in the mechanism (10) and adjustable
between a first mode of operation in which it allows the deadbolt (12) to move to,
and be maintained in the locking position when the actuator element is moved in the
locking direction from the datum position, and a second mode of operation in which
it allows the deadbolt to be returned to the withdrawn position when the actuator
element is moved in the opposite direction from the datum position; and, a disabling
arrangement (16) operative to initiate unlocking of the mechanism (10) by effecting
adjustment of the tumbler (13) to the second mode of operation, said arrangement including
a biasing arrangement (16) which is operative to hold the tumbler (13) in its second
mode so that movement of the actuator element in the unlocking direction can effect
withdrawal of the deadbolt (12), and also disengagement of the biasing arrangement
(16) from the tumbler (13). |