Abstract: A two-way door latch that is swingable relative to a door jamb, the door having an opening adjacent its edge whose opposing ends are covered by a pair of escutcheons. Rotatably mounted on each escutcheon is a knob having a short shaft that extends into the escutcheon and terminates in a cam, the knobs being rotable about a common axis. One of the cams is spring-biased and so shaped as to maintain the related knob at a rest position, whereby when the knob is turned in either direction to unlatch the door, when released the knob will be returned to its rest position. The cams are bridged by a pair of pins that are offset with respect to the common axis, and when a knob is turned, the pins then travel in a circle concentric with the axis.

Abstract: A fastener which including a probe having a shaft portion and a head to which is attachable a flexible strap, a receptacle affixable to a panel having a hole therethrough, and a spring for locking the probe in place when the probe is inserted into the hole. Upon insertion of the probe into or rotation of the probe in the hole of receptacle, the spring permits further insertion or withdrawal of the probe.

Abstract: A lock set for use with a deadbolt which includes an improved spindle mechanism is disclosed. The improved spindle mechanism permits the lock set to unlatch the deadbolt by rotating an inner knob without the need to operate a spindle-turning button.

Abstract: A handle lock having two handles to be symmetrically fixed on the inner and the outer bearing plate fixed on the inner and the outer side of a door, each handle assembled with a tubular shaft and a square shaft to retract a dead bolt to open the door, a locking rod combined in the inner bearing plate and being movable therein to permit the tubular shaft either to be rotated to open the door or to be prevented from being rotated by the handle either outer or inner, to lock the door.

Abstract: A button assembly for a button-actuated lockset having a locking mechanism. The button assembly includes a button member and an actuator mechanism such as a locking bar. A rib is provided on the button member to retain the button member on the locking bar yet permit rotation of the button member relative to the locking bar. The button assembly can further include a button cover provided with an engaging mechanism to allow the button cover to be press-fit on the button member.

Abstract: A conversion apparatus has a magnetic latching solenoid equipped with a special plunger shaft and piston mechanism which can move independently of the plunger, allowing mechanical locks to operate with momentary battery power. The plunger shaft is bored to accept the piston which consists of an inner shaft and a locking pin. The locking pin and inner shaft are secured to the plunger shaft with a light spring. With this mechanism, the operation of locking and unlocking is complete, regardless of readiness of the locking device, since the locking pin will move to the intended position of locking/unlocking after momentary prevention such as premature twisting of the lock knob.

Abstract: A carriage lock selectively enables and prevents a mobile carriage from moving along rails embedded in a building floor. The mobile carriage includes a shaft on which are rotatably mounted a driver sprocket, a hub, and a handwheel. The hub mates with the driver sprocket. A chain and sprocket mechanism connects the driver sprocket with the carriage wheels such that rotation of the handwheel and hub causes the carriage to move along the rails. A locking knob is loosely captured between the hub and handwheel for being manually rotated through a predetermined angle relative to the hub and handwheel. A pin is translatable within the hub parallel to the shaft longitudinal axis. The pin has a head that is received within a selected one of two angularly spaced depressions in a cam formed on the locking knob. The depressions are also spaced apart in the direction of the shaft longitudinal axis.

Abstract: A mobile carriage is movable along rails by manual rotation of a handwheel. The mobile carriage comprises a visual indicator that instantly informs a person of the locked or unlocked status of the mobile carriage. The visual indicator comprises at least one ridge on the handwheel and another ridge on a locking knob. The locking knob is loosely captured between the handwheel and a hub for selective rotation relative thereto between first and second end positions. The locking knob has a cam that slides a pin within the hub between first and second positions whereat the pin disengages and engages a stationary lock plate. When the locking knob is manually rotated to the first end position thereof, the pin disengages from the lock plate to enable handwheel rotation and carriage movement. Manually rotating the locking knob to the second end position thereof causes the pin to engage the lock plate and prevent handwheel rotation and carriage movement.

Abstract: An intermediate locking mechanism which is interposed between the existing door bolt works and the door knob of a standard key door lock, which can be unlocked by use of either a key or by entry of an electronic code, the mechanism includes the provision of an interconnecting means for interconnecting the door knob to the door bolt with which manipulation of the door knob withdraws the door bolt, a securing means for securing the interconnecting means to preclude its manipulation, an electrically operated means for unlocking the securing means by entry of an electronically entered combination code and a mechanical key operated means for unlocking the securing means by manipulation of a key. After entry of the combination code, the electrically operated means manipulates the securing means from a first normally locked position to a second position enabling unimpeded operation of the mechanism.

Abstract: A latch device including a privacy lock control member reciprocatably moveable along a first predetermined path of movement, a manually operable member for reciprocatably moving said control member in a direction generally opposed to the direction of movement of the manually operable member, and a lock member for selectively allowing actuation of the privacy lock by pushing the manually operable member from only one preselected end thereof.

Abstract: An inside operator for a lock having a spring biased bolt includes a shaft which can be immobilized, thus preventing longitudinal bolt motion, by applying force in the axial direction to the handle of the operator. The operator shaft is telescopic to ensure that the coupling of the operator shaft to the bolt is not interrupted as the operator is switched between operational modes.

Abstract: A latch bolt operating device incorporating lever handles and rotary plates cooperatively rotatable with the lever handles to control the angle of the rotation of the handles. The device is provided with a simplified privacy lock mechanism to prevent the opening of a door at one side thereof. The lock mechanism is directly mounted to the assembly of the lever handles, thereby eliminating the need of an additional housing to hold the mechanism. One of the rotary plates is provided with a cam face to actuate a lock shaft of the lock mechanism. The lock shaft is telescopic so that the device accommodates door panels of different thickness.

Abstract: A cylindrical lock is locked, the "locked" position is kept from the outside knob, which can not be revolved to open the door, but the inside knob is turnable to open the door after the lock is locked.

Abstract: For use with a deadbolt lock having an actuating knob, a lock plate and a tailpiece engaging the actuating knob, a lock accessory comprises an intermediate plate for location between the lock plate and a door on which the lock is provided. The intermediate plate has an opening through which the tailpiece extends and a manually actuatable locking member mounted on the intermediate plate for selectively preventing and permitting rotation of the tailpiece. The locking member is displaceable into a first position, in which the locking member is in locking engagement with the tailpiece, and a second position, in which the locking member is displaced out of locking engagement with the tailpiece, and has a portion which can be manually engaged for effecting the displacement of the locking member between the first and second positions.

Abstract: An inside lock for the latch of a camper shell or other similar structure has a housing which is fixed on the inside of a door with a bore surrounding an actuating rod extending from a lockable handle on the outside and rotatable therewith. The actuating rod, for example of square section, normally carries an actuating member which releases latch members at the periphery of the door on rotation of the handle. A removable member, for example a pin bent into a U-shape, is inserted in a transverse hole or holes in the housing, with a part of the pin abutting a surface or surfaces on the rod, preventing rotation thereof. This provides for locking the handle from rotation on the inside, even though the handle lock is released.

Abstract: An improvement of the door lock which is extensively used in all kinds of doors is disclosed which is characterized in that a security device is added to the existing door lock without modifying the constitution and the operating principle of the existing door lock, so that, once the security device is activated from the inside of the room, the door lock can never be opened by even the corresponding key and other means from the outside, thereby protecting the persons staying inside the room from the attempt of an unpermitted intruder.

Abstract: A latch device including a privacy lock control member reciprocatably moveable along a first predetermined path of movement, and a manually operable member for reciprocatably moving said control member in a direction generally opposed to the direction of movement of the manually operable member.Movement is imparted to the control member by a pivoted linkage arm interconnected at opposed ends to the manually operable member and the control member.

Abstract: A cylindrical lock comprising two limit plates, whose movement can control the outside knob and the inside knob both unturnable or the outside knob unturnable but the inside knob turnable.

Abstract: A lock assembly (10) for mounting on a door includes a dead-locking element (31), movement of which is controlled by an electrically operated device (35) for mounting on the door frame and magnetically coupled to a linkage system (32,33) whereby the dead-locking element (31) is moved. The linkage system carries a permanent magnet (34) which interacts with the core (37) of the solenoid when the door is in its closed position, and when the solenoid is energised it repels the permanent magnet (34) thereby operating the linkage system to move the dead-locking element (31) away from its operative position, thereby allowing a locking member (12) to be withdrawn.

Abstract: An over-loading idling lock set having an actuating shaft connected to an indoor lock core and an outdoor sealing block wherein the sealing block is connected to an outdoor lock core, and plural ball members pushed by corresponding restricting springs are disposed between the sealing block and outdoor lock core whereby the ball members are partially extended into corresponding restricting holes formed on the sealing block to associate the outdoor lock core with the sealing block. By means of turning an indoor or outdoor handle, the actuating shaft is rotated to open the lock set. When closing the lock set, a controlling bolt is inserted into a longitudinal groove formed on the indoor lock core to lock the same and thus when turning the outdoor handle, the ball members are separate from the restricting holes due to insufficient spring force. Therefore, the outdoor handle can only idle without opening the lock set.

Abstract: A door latch includes an elongated stationary case and a latch bolt mounted to reciprocate longtudinally in the case between outwardly extended and inwardly retracted positions. The latch bolt is driven between the two positions by a driver mechanically connected to the latch bolt and longitudinally movable within the case under control of first and second cams. The rotation of either cam will cause the driver to move against the force of a helical spring in direction to pull the latch bolt to an inwardly retracted position. A pushbutton key is mounted to a sidewall of the case and movable in direction into and out of the case to lock one of the cams against rotation. A pin, integral with and extending radially from said key, is received by a camming means on the other cam whereby rotation of the other cam will move the pin in direction to retract the key from the first mentioned cam. A detent in the case is held in position by the helical spring to frictionally engage the outer surface of the key.

Abstract: A locking device for doors, windows or the like includes a fixed element in which a movable element is slidably mounted. The movable element is configured for locking against rotation the square-section spindle or handle-bar to which the handle controlling the opening and closing of the door or window is fitted. Mechanism are provided to immobilize the movable element relative to the fixed element in both the locked position and the unlocked position of the locking device. The movable element includes catches or lugs adapted to engage openings formed in the fixed element. This locking device is adapted to be fastened to the jamb of the movable frame of a door or window, and more particularly between the movable frame and the square-section spindle of handle-bar.

Abstract: A door having a releasable door lock is disclosed for use in e.g. a bathroom. The locking mechanism comprises a plate having a slot which in use is moved to surround the square section spindle and prevent its rotation. The plate is moved by means of a rotatable pin which includes a toothed wheel such that rotation of the wheel moves the plate and locks it in position. The door is releasable from the outside of the room in an emergency.

Abstract: A lock system having a single direction closure comprising a permutation lock having a simplified mechanical arrangement for setting the combination for opening the closure. Upon actuation of the permutation lock, a protrusion therefrom releases a lever having a recess lock on a dog connected to the rotating spindle. The hub and spindle are severed to permit a single direction opening of the closure. The closure is reset by turning the combination knob on the permutation lock. The components are mechanically rugged and interrelated to provide the utmost in security; but yet, the minimum of inconvenience in opening.

Abstract: The knob spindle of a self contained electrically controlled door lock is locked and unlocked by a unidirectional miniature electric motor. The motor drives a lock pawl to and from locking position through cyclically operable mechanism including an energy storing spring. The mechanism invariably operates through a cycle and, if the pawl is prevented from moving, energy will be stored in the spring to subsequently move the pawl, thereby preventing stalling of the motor and undue drain on the batteries.

Abstract: A latch bar is connected to the plunger of a solenoid and is movable endwise to release an exterior knob spindle to enable the spindle to actuate a latch bolt retractor. A latch carried by the latch bar is held by the retractor to maintain the latch bar open until the retractor is later actuated by the spindle, thereby enabling a single electric pulse to effect release of the lock bar.

Abstract: A rotary handle operated lock includes a pan-shaped housing member that has a back wall at the base of a forwardly facing recess. A guide member is welded to the rear face of the back wall and cooperates with the back wall to define a sturdy guide channel which slidably mounts a control member form movement between locked and unlocked positions. A shaft extends through aligned holes that are formed in the back wall and in the guide member, and through a keyhole shaped slot that is formed in the control member. The shaft has a front end region that carries a pivotally mounted, nestable operating handle, and a rear end region that carries a latching arm. The operating handle and the latching arm rotate with the shaft between latched and unlatched positions.

Abstract: A recentering device for a shaft is disclosed which includes a return spring means and a recentering spring. The return spring applies a torque which varies directly with the angular displacement of the shaft from the center position over a predetermined range corresponding to the full operating range of the shaft. The recentering spring means applies a torque which varies inversely with the angular displacement of the shaft over the range of displacement. The maximum torque exerted by the recentering spring means is not substantially greater than the maximum torque exerted by the return spring. The torque exerted by each of the springs is a substantially linear function of angular displacement whereby a substantially uniform value of torque tends to return the shaft to its center position and thereby provides accurate recentering when the shaft is released.

Abstract: A door latch (24) suitable for latching a door (20) to a door frame (22). The door latch (24), in a preferred embodiment, has an adjustable nose bolt (36); is "panic unlatchable"; and can be operated by axial or rotational spindle forces supplied by, for example, a push button (48) or a door knob (120). The latch apparatus (24) preferably includes an adjustable nose bolt (36) which is adjustable in and out relative to the spindle (50). A trunnion (58) interposed between the inside handle (46) and the nose bolt (36) allows for relative adjustment of the nose bolt (36) with respect to the handle (46). In addition, a preferred embodiment of the latch apparatus (24) includes a lock lever (100) which forms a recess (108) suitable for capturing a spindle ear (110) to substantially prevent the spindle from operating the latch apparatus (24) to move the nose bolt (36) from a first position to a second position.

Abstract: A door latch mechanism for controllably securing a door, the latch mechanism of the type having a spindle and operating handles, comprises a fusible connecting member rigidly attaching the handle and spindle at room temperature, the fusible connecting member melting at elevated temperatures to permit relative rotation of the handle and spindle. The handle is mounted using a connecting member which is attached to the latch trim using a screwless connection. It is particularly applicable to latches using lever handles in that a positive positioning mechanism holds the handles at their selected positions, regardless of wear and age.

Abstract: A lockset for use on any one of various door panels of different thickness and hinged on a door frame includes a latchbolt adapted to project into a holder on the door frame and to retract therefrom. Inner and outer knobs are rotatably mounted on opposite sides of the door panel to rotate about a common axis and relative to inner and outer escutcheons held against the panel of whatever thickness. Inner and outer spindles are engaged by the knobs and turn in the escutcheons. The spindles rotate a rectangular tube interengaged with the latchbolt for all axial positions of the knobs to provide retraction thereof. A push button in the inner knob, when latched in a depressed position, secures the outer knob against rotation by a nonrotatable engagement with the inner escutcheon. Rotation of the inner knob releases the push button from the depressed position and frees the outer knob for rotation.

Abstract: A lockset for a door has a strike on the door frame and a latch bolt on the door panel. The latch bolt is reciprocable and is projected by a spring and preferably has a deadlatch operation. The latch bolt is retractable by rotation of an inner knob or of an outer knob. The outer knob is locked by a key lock controlling an axially movable plate engaged with the outer knob and interengageable with an outer escutcheon adjacent the outer knob. The key lock can move the plate out of engagement with the outer escutcheon and into engagement with the inner knob. A turn button in the inner knob can also move the axially movable plate.

Abstract: A door latch mechanism for controllably securing a door, the latch mechanism of the type having a spindle and operating handles, comprises a fusible connecting member rigidly attaching the handle and spindle at room temperature, the fusible connecting member melting at elevated temperatures to permit relative rotation of the handle and spindle. The handle is mounted using a connecting member which is attached to the latch trim using a screwless connection. This is particularly applicable to latches using lever handles in that a positive positioning mechanism holds the handles at their selected positions, regardless of wear and age.

Abstract: A lock assembly incorporating an exterior knob assembly which is axially movable into engagement with a latchbolt. The knob assembly includes a shaft having a circumferential groove into which a plurality of locking pins extend. The position of the locking pins is controlled by means of a number of combination knobs, and normally one or more of the locking pins is positioned within the circumferential groove to prevent axial movement of the exterior knob assembly. When the proper combination is chosen, the locking pins will be out of engagement with the groove, thereby allowing the exterior knob assembly to be moved into engagement with the latchbolt. The latch bolt can also be actuated by means of an interior knob assembly. The interior knob assembly is movable into a position which prevents engagement of the exterior knob assembly with the latchbolt despite the fact that the locking pins are all retracted from the circumferential groove.

Abstract: A vehicle door lock (201) and latch (204) assembly is provided whereby a key may be used to lock the door (200) and to prevent rotation of the outside door handle (214). An inside door handle (202) is provided remote from the lock assembly (201) and connected thereto by a linkage (216,232,246) which enables the inside handle (202) to operate the lock assembly (201) by overridng the key lock (308). The inside handle (202) can move the linkage to open the door (200) and lock or unlock the lock assembly (201). The outside handle (214) can open the door (200) only if the lock assembly (201) is unlocked. The lock assembly (201) may be unlocked from the outside only by turning the key in the lock (308) to the unlocked position.

Abstract: In a window lock operating device comprising an L-shaped handle member having a short arm connected to rotatable lock operating shaft and a long arm serving as a grip, a tiltable lever is provided in said short arm and is urged by a spring toward a position in which one end of the lever engages a retaining notch in a bearing member to be firmly secured on the window. A push rod that is displaceable in the long arm of the handle member may be operated to tilt the lever out of engagement with the notch against the force of the spring.

Abstract: A security lock for doors which may be unlocked from one side of the door only, and comprising sliding bar or pin means selectively engagable with the oppositely disposed door frames for locking the door against entry therethrough by unauthorized personnel. Knob means accessible from one side of the door only is operably connected with the bar means for positively locking thereof in the engaged position with the door frame, and quick relase means is provided for cooperation with the knob means for release of the locking engagement of the bar means with the door frames in order to permit passage through the door under panic conditions, or the like.

Abstract: A plastics moulding, such as a lever, includes an aperture with an integral web or fin extending partially across or into the aperture. The cranked end portion of, for example, a rod is inserted into the aperture and is acted on by the web or fin which serves to restrain vibration of the rod relative to the lever.

Abstract: A locking device for use with a combined handle and rotary latch assembly having a latching hook mounted on an axle stud that is journaled for rotation, in a latch assembly, comprising a locking slide disposed alongside the stud and having a keyhole recess receiving an elongated tab on the end of the axle stud, the recess having a narrow channel portion which slides over the tab in close fitting relation to lock the latch, and having an enlarged circular portion in which the tab can rotate without restriction, to unlock the latch. Yieldable detents restrict motion of the slide from locked to unlocked positions. In one embodiment, the slide is a one-piece molding with a shaped locking recess inside an operating knob, and in another embodiment, a separately formed nylon insert is fitted in the body of the slide to form the locking parts.

Abstract: A thumb-knob assembly for preventing a mortise lock from being opened from the outside even by a proper key. My thumb-knob assembly may be the one shipped with the mortise lock or may be bought separately and substituted for the thumb-knob assembly that was originally installed. It affords better protection than an extra bolt or a night-latch without their installation cost, is superior in appearance, and its installed cost should be less.

Abstract: A door lock has a frame in which a knob spindle is mounted for rotation about an axis. The spindle can be prevented from rotation on the frame by a bar movable along the axis into and out of a position in which the bar engages both the frame and a slot in the spindle. The bar is moved by a spring and by a manual button mounted in an inside knob on the frame. The spindle can also be prevented from rotation on the frame by a pin radially movable on the frame into and out of a position in which the pin engages both the frame and the spindle slot. The pin is moved by a spring and by an arcuate electromagnet disposed coaxially of the spindle and having a polepiece in position to influence an armature on the pin. The customary key-operated lock is installed in an outer knob fastened onto the spindle.

Abstract: When turned to a locked position, a turn button causes the outside operating lever of the latch to be held against rotation so as to lock the door against entry from the outside. Turning of the inside operating lever in either direction to open the door causes the turn button to return automatically to its unlocked position to prevent inadvertent locking of the door. Automatic return of the locking button is effected through the coaction of a spring-loaded pin on the inside lever with a pair of shoulders on the inner face of the turn button.

Abstract: A retainer cylinder is rotatably mounted in the bore of a housing cylinder and selectively latched against rotation by means of a resilient latching assembly. The housing cylinder is formed with a longitudinally extending groove and a corresponding recess is formed in the retainer cylinder. In one arrangement, the resilient latching assembly comprises a flat spring captured in the housing cylinder groove and having an intermediate portion resiliently urged into the retainer cylinder recess. A dog slidably mounted in the recess is cammed by a key to force the spring element from the recess and allow rotation of the retainer cylinder. In a second arrangement, the same housing cylinder allows for handle operation of a retainer cylinder wherein the latching assembly comprises a cam pin resiliently mounted in the retainer cylinder recess.

Abstract: A latching device for luggage or the like cooperable with a hasp is constted so that a manually operable latch member is pivotally connected to a projection on a mounting plate for allowing the latch member to be rotated with respect thereto. A leaf spring biases the latch member into contact with the top surface of the projection. The projection includes stop surfaces for limiting rotation of the latch member in a first direction to a closed position wherein the latch member substantially overlies the mounting plate and for limiting rotation of the latch member in the opposite direction to an open position wherein the latch member is substantially perpendicular to the mounting plate. The leaf spring also biases a detent ball into contact with a surface of the latch member for releasably maintaining the latch member in the open and closed positions.