A door plate has a main body with a front side, a rear side, a top side, a bottom side, a first adjacent side, and a second adjacent side. The main body includes a handle aperture and fastener apertures. The handle aperture is configured to receive a door handle of the door. The handle aperture is formed through the main body from the front side to the rear side of the main body. Each of the plurality of fasteners is formed through the main body from the front side to the rear side. The main body has a depth defined by a maximum distance between the front side and the rear side of the main body at the second adjacent side of the main body. The depth of the main body militates against a prying of the door with a crowbar where the main body is installed on the door.

A security door lock with a hinged door and a locking assembly. The door jamb has a number of apertures formed in a bolt receiving side of the jamb to receive a corresponding number of door bolts extendable from an outer free edge of the door. The locking assembly has a barrier panel spaced from the jamb to define a narrow longitudinal slot is adapted to receive a door guard member extending normally from an internal surface of the door adjacent the outer free edge, and is reinforced by the barrier panel against lateral flexing or distortion. A handle mechanism controls the lateral movement of the closure and the retraction or extension of the locking bolts.

A lock can include attack-resistant and/or weather-resistant features. Attack-resistant features can include a sacrificial link between a locking mechanism and an external keyway covering an exterior face of the locking mechanism. The sacrificial link can break during a torque attack on the lock such that the full force of the torque attack is not applied to the locking mechanism. Weather-resistant features can include drain openings in one or more housing components external to the locking mechanism to facilitate drainage of liquid matter from the lock before the liquid matter reaches the locking mechanism.

A sliding door handle and strike assembly includes a locking member for engaging the strike to prevent the door from opening. The locking member is biased to an unlocked position, until it is moved into a locking position, in which magnetic co-operation acts to hold the locking member in the locking position.

A security door lock for security back locking of a door lock. The door lock enables back locking of the door lock from inside in such a way that the lock cannot be opened with a key or a picklock. The lock includes a lock body, a lock bolt inside the lock body, a lock bolt shifter inside the lock body, a lock bolt shifting lever protruding from the lock bolt shifter, a slot in the lock body for receiving the lock bolt shifting lever which is turnable between its inclined end positions in the slot when the lock bolt shifter is rotated, twist means inside the door for rotating the lock bolt shifter, a key cylinder outside the door, and an opening spindle present between the twist means and the key cylinder. The opening spindle is in engagement with the lock bolt shifter for shifting the lock bolt by tuning the key or the twist knob. A security latch is movable from a security locking release position to a security locking position in which the security latch covers the slot in the lock body thereby preventing turning of the lock bolt shifting lever between its inclined end positions and locking the lock bolt shifter in a non-rotatable manner against turning effected with the key or the picklock, wherein the security latch (104) is arranged to be moved axially by turning the twist means (102).

A movable latch housing apparatus and method of installation for enhancing security of a latch mechanism that has a channel with a linear drive that is removably engagable to a slidable engagement structure with a shoulder that is pivotally attached through an arm to a door for automated opening and closing, with a lever that can selectably disengage the slidable engagement structure from the linear drive to allow the door to open freely. The apparatus includes a base and a pair of opposing sidewalls each extending in a same direction perpendicular to and straddling the base and attach to the shoulder, the sidewalls extend beyond the base forming an open ended slot for arm movement. Wherein operationally, the base and the sidewalls shield the lever from unauthorized access to help prevent disengagement of the lever from the linear drive which would allow the door to be freely opened.

A lock and method of use for securing and un-securing first and second articles, the lock comprises a first element rotationally engaged about a longitudinal axis to the first article, an extension beam rotationally engaged about a lengthwise axis to the first article, the lengthwise and longitudinal axes are coincident, the beam has structure to rotationally engage and disengage the first element. Also included is structure to engage and disengage the second article that is driven from the beam, wherein operationally the beam rotationally engages the first element and the extension beam engages and disengages the first and second articles, resulting in the beam always being able to engage and disengage the first and second articles and the first element only having an ability to engage and disengage the first and second articles when the first element and the beam are rotationally engaged to one another.

A lock case with an anti-pick function is mounted on a door. The lock case includes a latch for retaining the door in a closed position. When the door is closed, an anti-pick latch of the lock case is in a retracted position to pivot an anti-pick member of the lock case to an anti-pick position, such that the latch cannot be picked to the latching position. When the door is not closed or a connecting member of the lock case is operated to actuate the latch, the latch can move to the latching position.

A bolt module is disclosed. The bolt module comprises: a bolt moveable between a thrown position and a retracted position; an anti-thrust member moveable between a release position in which the bolt can be retracted and a plurality of blocking positions obstructing driving back of the bolt under action of an external force on the bolt and, a first rotor assembly capable of accepting a drive element, the first rotor assembly arranged to drive the bolt and to move the anti-thrust member between the plurality of blocking positions and the release position. Each of the plurality of blocking positions may respectively limit to different extents the driving back of the bolt under action of an external force on the bolt. There is also disclosed a leaf or door comprising the bolt module, wherein the bolt module is mounted on the leaf or door for securing the leaf or door.

A lock and method of use for securing and un-securing first and second articles, the lock comprises a first element rotationally engaged about a longitudinal axis to the first article, an extension beam rotationally engaged about a lengthwise axis to the first article, the lengthwise and longitudinal axes are coincident, the beam has structure to rotationally engage and disengage the first element. Also included is structure to engage and disengage the second article that is driven from the beam, wherein operationally the beam rotationally engages the first element and the extension beam engages and disengages the first and second articles, resulting in the beam always being able to engage and disengage the first and second articles and the first element only having an ability to engage and disengage the first and second articles when the first element and the beam are rotationally engaged to one another.