Deadlock with key operated locking cylinder
OwnerJohn R. Wattsinventor
Life of this patent
Estimating the term…
Abstract
A deadlock with a locking bolt having a tongue that is displaceable from a latched position to an unlatched position, the lock including locking means to displace the tongue past the latched position to a locked position. The locking tongue is similarly curved on both sides so that, in use, it slides past a striker plate to the latched position in both right and left hand locking doors. A multi-point deadlock in which a center lock is coupled to at least one auxiliary lock via transmission mesans. The center lock having handles coupled to the latching tongue of the center lock and the transmission means so that downward movement of either handle causes the center lock to unlatch and upward movement of either handle from the horizontal drives the transmission means to effect locking of the auxiliary lock.
Claims20
A deadlock comprising a lock casing, a locking bolt displaceable within said lock casing, the bolt having a locking tongue arranged, in use, to engage a striker plate, means to displace said locking bolt from a latched position where the tongue extends a short distance out of said lock casing to an unlatched position wherein the tongue is wholly within the casing, locking means comprising a lock slide to drive the tongue past the latched position to a locked position with the locking tongue extending a substantial distance out of the lock casing, and a key operated locking cylinder having an arm which engages the lock slide to displace the slide so that the slide presents an inclined surface to the locking bolt at the rear of the locking tongue to force the tongue outwardly of the casing to the locked position with a portion of the side extending behind the locking tongue, the locking tongue being similarly curved on both sides so that, in use, either side can slide past a striker plate in the latched position thereby enabling the lock to be used in both left and right hand locking doors.
The deadlock according to any one of the preceding claims, wherein the lock has a handle on each side of the casing interconnected by a shaft which drives a cam that engages the locking bolt to displace the bolt from the latched position to the unlatched position.
A multi-point lock comprising a centre lock coupled to at least one subsidiary lock via transmission means, the centre lock comprising a casing having a bolt displaceable therein, the bolt having a tongue arranged, in use, to engage a striker plate on a door jamb, a pair of handles positioned one on each side of the primary lock casing, and a triple cam assembly positioned within the primary lock casing interconnecting the pair of handles to the transmission and the bolt, the triple cam operating whereby rotation of either handle in a downward direction causes the tongue of the primary lock to assume an unlatched position and upward rotation of either handle causes the triple cam to impart drive to the transmission means to cause the subsidiary locks to assume the locked position.
Dependencies are inferred from the claim text.