Abstract: Door lock apparatus, comprising in combination an elongated housing having input code selectors on the housing, to enable door locking and/or unlocking via a locking element, a locking handle protruding from the housing, a coupling in the housing having parts that interfit to enable force transmission between the handle and element, and a coupling mechanism responsive to code selection to control coupling of the parts.

Abstract: In combination, a door, two latches at an edge of the door, and door latch operating components at opposite sides of the door; displaceable structure in the door having a position blocking movement of the latches, first mechanism responsive to displacement of one of the components for displacing the structure from blocking position to allow movement of the latches, for door opening; and electrically operable actuating means for effecting displacement of the structure from blocking position to allow movement of the latches, for door opening.

Abstract: In a lock drive train, the combination includes a pivoted lock bolt to be carried by a door, a casing, a rotary cylinder operatively rotatable during door opening or closing, a rack driven endwise in response to cylinder rotation, a gear rotatable by the driven rack, a pivoted lock dog driven by the gear, a bolt release lever, pivotable by the gear, between angular positions in which it is retained by the lock dog, the angular positions corresponding to extended and retracted positions of the bolt.

Abstract: Door top latch and actuating apparatus, comprising in combination, a mounting bracket configured to attach to a door top, a latch located by the bracket to move up and down, relative to the door top, an actuator rod extending vertically below the latch, and operatively connected to the latch whereby door handle operated vertical movement of the rod moves the latch vertically, and a compression spring associated with the rod for urging the rod and latch upwardly into latching position, the spring accommodating downward movement of the rod and latch, to unlatch the door, and a motion adaptor operatively connected between the rod and latch.

Abstract: In a drive train between a door handle having a first axis of rotation and a rotary lock part carried on a door to have a second axis of rotation, the drive train accommodating to possible misalignment of those axes, the drive train including a carrier, a rack carried by the carrier, and movable in a first lateral direction in response to door handle rotation, a gear located to rotatably drive the rotary lock part in response to rack movement in the first lateral direction, relative to the carrier, and means to adjust the position of the rack in a second lateral direction, to compensate for mis-alignment of the first and second axes.

Abstract: An interchangeable core assembly for a lock core assembly capable of being flush mounted in a door including a housing, a lock insert mounted in the housing, a lock core mounted in the housing adjacent to and cooperative with the lock insert, a thumb-turn assembly mounted in the non-cylindrical housing coaxial with the lock core, a first offset cam mounted on the thumb-turn assembly for rotation therewith, and a second offset cam mounted on the lock core for rotation therewith. The barrel of the lock core assembly is unobstructed by locking train components such that the lock core assembly extends completely through the latch assembly when installed therein. The lock core assembly is secured to the latch assembly without threads and a means to remove/replace the thumb-turn component is provided.

Abstract: The method of controlling unlocking of one or both side by side doors, that include providing two rotary input devices; providing a first mechanism responsive to rotation of one of the devices, to unlock one of the doors; providing a second mechanism responsive to rotation of the other of the devices to unlock both of the doors, the second mechanism operatively coupled to the first mechanism, to activate the first mechanism after predetermined rotation of the other device.

Abstract: In combination a door, latch structure at an edge of the door, and independently opens the door latch operating components at opposite sides of the door, displaceable structure in the door having a position blocking movement of the latch structure, first means responsive to displacement of a selected one of the components for displacing the structure from the blocking position to allow movement of the latch structure, for door opening, and the first means including a rotatable cam having reversible positions in each of which motion is transmitted to the displacement structure in response to displacement of the respective components.

Abstract: In a door strike for captivating and releasing a door bolt, the combination comprising a longitudinally elongated carrier, a longitudinally elongated solenoid supported by the carrier, the solenoid having a longitudinally movable plunger, a trip lever pivotally supported in or on the carrier, a laterally extending actuating arm pivotally supported in or on the carrier to be pivoted as the plunger moves longitudinally in response to solenoid energization, thereby to pivot the trip lever, a generally longitudinally extending blocking arm or arms pivotally supported in or on the carrier to be released for pivoting when the trip lever is pivoted, and a door bolt retainer or retainers pivotally supported in the carrier to be released for pivoting when the blocking arm or arms are released for pivoting, thereby to release the door bolt from captivation, for movement with the door. Dual springs are compressed by the plunger in response to solenoid energization.

Abstract: In a door strike for captivating and releasing a door bolt, the combination comprising a longitudinally elongated carrier, a longitudinally elongated solenoid supported by the carrier, the solenoid having a longitudinally movable plunger, a trip lever pivotally supported in or on the carrier, a laterally extending actuating arm pivotally supported in or on the carrier to be pivoted as the plunger moves longitudinally in response to solenoid energization, thereby to pivot the trip lever, a generally longitudinally extending blocking arm or arms pivotally supported in or on the carrier to be released for pivoting when the trip lever is pivoted, and a door bolt retainer or retainers pivotally supported in the carrier to be released for pivoting when the blocking arm or arms are released for pivoting, thereby to release the door bolt from captivation, for movement with the door.

Abstract: Apparatus to provide controlled frictional resistance to cyclic displacement of a member, comprising a base, a friction part frictionally and slidably engagable with base, in response to displacement of member, at least one spring element transmitting force acting to hold part in frictional engagement with the base, one of friction part and base having a friction surface engaged with the other of part and base, and characterized in that the force to overcome friction between the base and part remains substantially constant over a large number of displacement cycles of the member.

Abstract: A method of providing and installing a door latching structure for operatively interconnecting an upper latching structure carried by a door and a lower actuator structure carried by the door, the upper latching structure located outside the door, and comprising providing a longitudinally elongated link sized for reception within the door and to extend into proximity to the latching structure, and to the actuator structure, the link operatively connected to the actuator structure; and providing a laterally extending link attached to an upper end portion of the longitudinally elongated link, the laterally extending link connectible to the latching structure to transfer longitudinal movement of the longitudinal link effected by the actuator structure to the latching structure, for operating same.

Abstract: In a door closure assembly, the combination comprising a latch bolt element; carrier structure to carry the bolt element to pivot between door unlatched and latched position; and means carried by a fire resistant portion of the assembly to be responsive to an increase in temperature to a level T to move into position to block door unlatching movement of the bolt element from door latching position.

Abstract: A door latching structure for operatively interconnecting an upper latching structure carried by a door and a lower actuator structure carried by the door, the upper latching structure located outside the door, and comprising a longitudinally elongated link sized for reception within the door and to extend into proximity to the latching structure, and to the actuator structure, the link operatively connected to the actuator structure; and a laterally extending link attached to an upper end portion of the longitudinally elongated link, the laterally extending link connectible to the latching structure to transfer longitudinal movement of the longitudinal link effected by the actuator structure to the latching structure, for operating same.

Abstract: A door latch actuating mechanism comprises: a housing attachable to door structure, a handle carried by the housing for rotation in either of two directions, and an output shaft rotatable in response to handle rotation, and mechanism in the housing to yieldably resist handle rotation in either direction, the mechanism including(i) a rotor coupled to the handle to rotate therewith,(ii) a first spring coupled to the rotor to resist rotor rotation in one direction, and(iii) a second spring coupled to the rotor to resist rotor rotation in the opposite direction.

Abstract: Disclosed is an improvement in the lock mechanism described in U.S. Pat. No. 3,073,143. The improvement comprises barrier walls on the bolt which prevent a shim-type pick device from opening the lock mechanism. The barrier walls are positioned to prevent the pick device from tripping the locking member which locks the deadlock actuator in the locked position.

Abstract: A release strike assembly, comprises:a strike bolt is pivotally mounted by a case to swing between extended and retracted positions, and a spring yieldably urges the bolt toward its extended position. First and second latch elements cooperate with one another, in pivoting, and the first latch element blocks the bolt against swinging toward retracted position when the first latch element is in its first position. The first latch element also has a second position in which it allows the bolt to swing toward its extended position. An actuator pivots one of the latch elements,a second latch element pivotally supported for swinging movement within the case between primary and secondary positions, the second latch coupled to the first latch element to pivot with the first latch element,and an actuator to effect pivoting of one of the latch elements.