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 t...

A lock for a door (10) comprises a casing (11), a bolt (55) operable to extend from or retract into the casing, a pivoted operating handle (36) operable at one side of the door to retract the bolt, lock means (28) for key operation at the other side of the door, and blocking means (81) to prevent operation of the handle to retract the bolt. In a locked closed position of the door, the bolt (55) is extended, and with the blocking means operated, key operation of the exterior lock means (28) both ...

A lock comprising, within a box-like supporting body and associated with actuation elements which are available to the action of the user and/or of other devices, three locking beaks: two first lateral ones, whose free tips are shaped so as to form mutually opposite claws which lie on the plane of the closure and opening movement, and a third central beak, which is kinematically connected and coordinated with respect to the two first beaks and is provided, at its free tip, with at least one lock...

A lock for a door comprising a casing, a bolt operable to extend from or retract into the casing and manually operable bolt retention means to retain the bolt in its retracted state even when an automatically operating bolt holding member is released by inwards movement of a bolt release member. The bolt retention means comprises a snib having a part receivable in an opening in the bolt when the bolt is manually moved into the case from its normally retracted position. Once the snib part is in t...

A lock has a holding bolt and a retaining member for yieldably retaining the holding bolt in its bolting and its release position and for positively preventing the bolt from withdrawal from the lock unless a fastening member attaching a forend of the lock to the lock case is at least partly released.

A lock for a door has a casing, a bolt, a pivoted operating handle operable to retract the bolt, and lock structure comprising a lock cylinder. The lock cylinder is secured to the housing by a screw covered by a rose around the part of the housing, the rose being secured in place by fixing screws which can only be accessed upon removal of the casing assembly from the door and with the bolt in a retracted position. In this state, the shank of the screwdriver to undo each fixing screw can easily b...

A lock for a door (10) comprising a casing (11), a bolt (55) operable to extend from or retract into the casing, a pivoted operating handle (36) operable at one side of the door movable from a rest position to an operating position to retract the bolt, the interior of the casing having a lug (21) through which a screw (27) passes into engagement in a tapped hole (23) in a fixing plate (12a) which is secured to said one side of the door, thereby indirectly securing the casing to the door. A screw...

A lock comprising a locking mechanism and a sleeve disk assembly, wherein the locking mechanism comprises: a housing assembly; an outside actuation tube; a key actuation tube; a transmission element; a spring; an outside holding sleeve; a knob rod; when the transmission element is pushed by the knob rod to the first axial position within the key actuation tube, the rotation of the outside actuation tube rotates the outside holding sleeve and the key actuation tube; when the transmission element ...

A lock includes a casing, a cylindrical rod and a key, the casing having a longitudinal hole for the cylindrical rod received therein. The casing and the cylindrical rod have a main transverse hole device defined radially respectively therein and are in alignment with each other for receiving a main pin device therein, the cylindrical rod having a key hole defined longitudinally therein, at least one offset transverse hole device defined between the key hole and the main transverse hole device w...

A lock secured to a surface for releasably retaining a motorcycle thereon. The lock includes a pair of outer tubular members secured to the surface. The outer members each enclose a height adjustment bar secured to the lower end of the outer member. The height adjustment bars each include a number of laterally extending pins spaced along the length of the bar. A pair of inner tubular members including a keyway secured to a lower end of the inner member are slidably insertable into the outer memb...