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.
Claims11
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 automatically and directly engage the bolt and to deadlock the bolt when it is in its extended position, and a unitary element separate from the casing, said element providing within the casing either a part only of a bearing surface for a pivot of the operating member or a part only of a bearing surface for a pivot of the locking member, or parts only 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 automatically, directly to engage the bolt and to deadlock the bolt when it is in its extended position, and a unitary 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, wherein the element provides at least parts respectively of bearing surfaces for respective pivots of the operating member and the locking member, and for each pivot, said element provides a semi-cylindrical bearing surface.
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, wherein the element provides a pair of spaced arms defining an opening therebetween, a spring biased bolt release member having a part slidably arranged in said opening, with an end of a biasing spring engaging said arms.
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, wherein the element provides a guide slot for a connector component between the operating member and the locking member, the component being formed from spring steel and operating so that via said component the locking member is released from engagement with the bolt when the operating member is pivoted to retract the bolt from its extended position.
Dependencies are inferred from the claim text.