Lock
AssigneeBanham Patent Locks Limited
InventorBrian Edward Cowper
Life of this patent
Estimating the term…
Abstract
A lock for a door comprises a casing, a bolt operable to extend from or retract into the casing, a pivoted operating handle operable at one side of the door to retract the bolt, lock means for key operation at the other side of the door, and blocking means to prevent operation of the handle to retract the bolt. In a locked closed position of the door, the bolt is extended, and with the blocking means operated, key operation of the exterior lock means both retracts the bolt and also de-actuates the blocking means. At the inside of the door further key operable lock means are provided solely to operate and, if required, to de-actuate, the blocking means.
Claims43
A lock for a wing movable between respective open and closed positions relative to a frame comprising a casing, a bolt operable to extend from or to retract into said casing, an operating member arranged to be operable at one side of the wing, in use, to effect retraction of the bolt, lock means arranged, in use, for key operation at the other side of the wing, and blocking means operable, in use, to prevent operation of the operating member to retract the bolt, the arrangement being such that, in use, in a locked, closed position of the wing said bolt is extended and said blocking means, if operated, prevents retraction of the bolt by said operating member, key operation of said lock means de-actuating said blocking means, if operated.
19 A lock as claimed in any one of claims 1 to 16, wherein said key operation of said lock means retracts the bolt.
A lock for a wing movable between open and closed positions relative to a frame comprising a casing, a bolt operable to extend from or to retract into said casing, an operating member at one side of the wing, in use, arranged to be pivotally operable to retract the bolt, a pivoted locking member at least partly within the casing, arranged to deadlock the bolt when it is in its extended position, and an element providing within the casing either at least part of a bearing surface for a pivot of the operating member or a pivot of the locking member, or at least parts of respective bearing surfaces for respective pivots of the operating member and the locking member.
A lock for a wing movable between open and closed positions relative to a frame comprising a casing, a bolt operable to extend from or to retract into said casing, an operating member at one side of the wing, in use arranged to be pivotally operable to retract the bolt, a pivoted locking member at least partly within the casing, arranged to deadlock the bolt when it is in its extended position, and an element providing within the casing either at least part of a bearing surface for a pivot of the operating member or a pivot of the locking member, or at least parts of respective bearing surfaces for respective pivots of the operating member and the locking member.
Dependencies are inferred from the claim text.