Lock
AssigneeBanham Patent Locks Limited
InventorBrian Edward Cowper
Life of this patent
Estimating the term…
Abstract
A lock for a door (10) has a casing (11), a blot (55), a pivoted operating handle (36) operable to retract the bolt, and lock means comprising a lock cylinder (39). The lock cylinder (39) is secured to the housing by a screw (38g) covered by a rose (110) around said part of the housing, the rose being secured in place by fixing screws (38h) which can only be accessed upon removal of the casing assembly from the door and with the bolt in a refracted position. In this state the shank of the screwdriver to undo each fixing screw can easily be passed through respective aligned openings in a cover plate (12) of the housing assembly, the bolt (55), and the housing (38), thereby allowing removal of the rose and subsequent replacement of the cylinder (39) without the need to remove components of the door lock itself.
Claims9
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, a housing extending from one side of the casing, a lock cylinder at least partly received in said housing, fixing means at said housing securing the lock cylinder to said housing, and cover means preventing access to said fixing means, release of the cover means to allow access to said fixing means for releasing the securement of the lock cylinder to the housing only being possible from the opposite side of the casing.
Dependencies are inferred from the claim text.