Abstract: A lock core assembly has a lock shell, a lock core mounted rotatably in the lock shell, multiple pin assemblies and an arrestor. Multiple mounting chambers are formed between the lock core and the lock shell. The pin assemblies are mounted respectively in the mounting chambers and each have an upper pin situated at an interface between the lock core and the lock shell to prevent a rotation of the lock core and a lower pin with an annular groove. The lock shell has a retaining cavity formed inside. The lock core has a mounting recess communicating with the mounting chambers and aligning with the retaining cavity. The arrestor is mounted slidably in the mounting recess. Without inserting a right key into the lock core, the arrestor is held in the retaining cavity to prevent the lock core from rotating to provide an improved burglarproof effect.

Abstract: A cylinder lock assembly has an exterior housing, a core casing set and a core. The exterior housing has a through hole defined longitudinally through the exterior housing and a mounting hole defined in the exterior housing and communicating with the through hole. The core casing set is mounted slidably in the exterior housing and has a core casing and a retaining pin. The core casing has a central hole and a mounting aperture. The retaining pin is mounted slidably through the mounting aperture and has an inside end. The core is mounted in the central hole in the core casing and has keyhole having a stepped recess selectively engaging with the inside end of the retaining pin. A crash of the retaining pin and the stepped recess during the engagement notifies a user that the core and the core casing are released.

Abstract: The invention concerns an electromechanical lock. More specifically, the invention concerns an interchangeable electromechanical lock core that is equipped with a blocking cam that secures the lock core in a mating housing. The blocking cam may be coupled to a plug and the plug may be coupled to a knob. Once both couplings have occurred, the knob can be turned to actuate the blocking cam.

Abstract: A lock system is provided including a lock core and a token. The lock core comprises a core body, a lock actuator coupled to the core body for rotation about an axis, a blocking body, and a solenoid. The solenoid has a shaft that is movable between a first position in which the blocking body is locked to prevent rotation of the lock actuator about the axis and a second position in which the blocking body is unlocked to allow rotation of the lock actuator about the axis. The token is couplable mechanically to the lock actuator. The solenoid moves the shaft from the first position to the second position so that the blocking body is unlocked if the token has a valid access code.

Abstract: A device for actuating a lock on a vehicle door has a support mounted on a vehicle door. A lock cylinder mount, or a decoy, is mounted on the support. A screw secures the mount when mounted on the support. The mount has a shoulder engaging a counter shoulder of the support at least partially in the mounting position of the mount. The screw has an actuating end for moving the screw into a release position and a locking position. In the release position, the mount is removable from and mountable on the support. In the locking position, the mount is secured. The mount has a threaded receptacle for the screw so that the screw is part of the mount. The support has a screw support surface against which the actuating end of the screw rests in the locking position of the screw for securing the mount.

Abstract: Disclosed is an exchangeable lock structure, which is mounted to a door lock of an entrance door of a guest room in accommodations such as a hotel, and the like, and operated by the insertion of a key, and more particularly, it can be detached from or assembled to a main body of the door lock in itself. Concretely, the exchangeable lock structure includes an opening and closing operation portion 10 disposed at a lower portion of a main body 2 and an exchange operation portion 20 at an upper portion thereof.

Abstract: The invention provides a padlock with a quickly changeable shackle, comprising a locking core, a locking member, blocking balls, a lock body on which two limb receiving chambers and a passage are disposed, and a shackle which takes U-shape defined by a longer and a shorter parallel limbs respectively received in the limb receiving chambers to lock the padlock. A ring groove with an abutment head is disposed at the free end of the longer limb, and a depressed portion with a screw hole is provided on the circumferential surface of the abutment head. A shackle changing screw is threaded into the screw hole and the end face of the screw in the threaded position is higher than the depressed portion and lower than the circumferential surface of the abutment head. The invention further provides a padlock having a freely-convertible deadlock mechanism.

Abstract: A cylinder housing arrangement, where the cylinder housing encloses a lock cylinder or the like, which comprises a number of locking elements to be arranged by a key, preferably tumbler discs to be turned by a key, which discs in their locked position prevent the turning of the lock cylinder relative to the cylinder housing. The cylinder housing comprises a body part and a separate cover part, which is arranged to be installed in the crosswise direction relative to the cylinder housing at the end of the body part on the inserting side of a key, so that it is locked to the body part in the axial direction of the cylinder housing.

Abstract: A cylinder housing includes a longitudinal hole for receiving a cylinder of an auxiliary lock. An annular flange is formed on an end of an outer circumference of the cylinder housing, leaving an annular end portion on the end of the cylinder housing. The cylinder housing is mounted to an outer surface of a door having a bore-hole, with the end portion being in intimate contact with a circumferential surface delimiting the bore-hole of the door, and with the annular flange intimately abutting against the outer surface of the door.

Abstract: The description relates to a closing cylinder for closure devices comprising a cylindrical closing housing which can be received in a fixed manner in an opening formed by a handle, closure device or the like, a closing core (18) is rotatably mounted in this closing housing and is axially supported at one of its ends on the housing edge by an edge projection (20) and carries or forms a drive at its other end for a bolt or closure (124), wherein, according to the invention, the drive (124) is held at the end of the closing core (118) in a positive engagement so as to be exchangeable.

Abstract: A lock set with a quick changeability has a plug, a cylinder, a seat, a ring and a sliding cover. The plug is mounted in the cylinder and has multiple first holes in rows wherein multiple lower pins are inserted. The cylinder has a chamber radially defined therein wherein the plug is inserted, and a lug formed in a top end thereof. Multiple second holes in rows are respectively defined in the lug and multiple upper pins and springs are inserted into the second holes. Multiple openings in rows are respectively defined in a lower inner wall of the cylinder wherein upper pins and springs are inserted into the second holes. The sliding cover abuts the lower inner wall of the chamber and has multiple orifices in rows defined therein. Hence, it is easy for a user to change a corresponding key.

Abstract: The handcuff assembly includes a bow pivotally connected to a cheek plate frame assembly which includes a base frame. A removable lockset assembly for locking a pawl relative to ratchet teeth on the bow and including a slideable lock bar is received in the base frame. A key receiving structure on each side of the lockset assembly is provided for receiving a key and enabling the key to turned in one direction only for first unlocking a double-lock, which prevents movement of the bow in either direction and for secondly, completely unlocking the handcuff by moving the pawl away from the bow and against a spring mechanism. An easily deflectable detent is provided on a lockset housing for releaseably locking the lockset assembly within the base frame of the cheek plate assembly.

Abstract: A lock assembly for a keyed knob includes an insert, a cylinder assembly and a retainer. The insert is inserted into the knob after the retainer is attached thereto. The insert is inserted from the rear of the knob and attached thereto. The cylinder assembly is then inserted into the front of the insert until the retainer engages the cylinder assembly to secure the cylinder assembly into the insert. The cylinder assembly is readily removed by pressing on a step portion of the retainer with a tool inserted through the rear of the knob.

Abstract: A lock assembly includes a housing, a core assembly and a retainer. The housing includes a housing retainer groove located generally transverse to an axis defined by a bore through the housing, which corresponds with a core retainer groove. When the core assembly is mounted within the bore, the retainer grooves are aligned. The retainer is inserted into the grooves such that a bridge portion of the retainer is engaged by an engagement feature to secure the retainer and thereby mount the core assembly into the housing.

Abstract: A retainer clip is used for retaining a lock plug within a bore of a lock housing. The retainer clip includes a generally arcuate body disposeable about the plug outer surface and having a radial retention surface positionable generally against a housing end surface so as to prevent axial displacement of the plug along the bore. Two projections are each disposed proximal to a separate end of the body, each projection being disposeable within a separate plug opening when the body is disposed on the plug to retain the clip engaged therewith. The clip body has a hinge, a first arm portion extending between the hinge and one free end and a second arm portion extending between the hinge and the other end. The hinge is configured so that the two arm portions are deflectable generally about the hinge to move with respect to each other during installation and removal.

Abstract: An assembling structure for the door lock includes a lever, a lock core unit, an axial tube and an adapter. The lever has a compartment and an engaging member formed therein. The axial tube provides a longitudinal slot and a transverse-retaining recession formed therein. The adapter also correspondingly provides a positioning member. Firstly, when the adapter and the axial tube are assembled, the positioning member of the adapter is engaged with the transverse retaining recession of the axial tube via the longitudinal slot so that the axial tube and the adapter constitute a combination unit. Secondly, assembling the lever and the combination unit, the engaging member of the lever is engaged with the longitudinal slot of the axial tube. Due to obstruction of the engaging member of the lever in the longitudinal slot, the positioning member of the adapter is confined and unable to return to the longitudinal slot.

Abstract: Disclosed is an exchangeable lock construction, which a main body assembly having a casing, a rolling body and an tubular operation body is inserted into a fixed body, and which the main body assembly can be separated from the fixed body by a key. The lock construction includes a slide bar supported by the spring in a lateral direction of the rolling body, and a plurality of slide pins respectively having receiving grooves formed thereon in such a manner as to located at different positions and heights thereon, the slide pins being aligned by a side waved portion of the key, wherein the tubular operation body further has an elongated operation hole formed at a side thereof for allowing the slide bar to slidably pass therethrough, and the casing has a locking groove formed on the inner periphery thereof for locking the outer side end of the slide bar therein.

Abstract: A rekeyable lock cylinder comprising: a cylinder body having a longitudinal axis and defining a longitudinally spaced, radially-aligned first plurality of pin chambers, each of said first plurality of pin chambers adapted to house a corresponding first pin, said cylinder body further defining a longitudinally extending slot therethrough; and a plug assembly disposed in said cylinder body, said plug assembly comprising a plug body defining a second plurality of pin chambers, each of said second plurality of pin chambers adapted to house a corresponding second pin, said plug body rotatable within said cylinder body between a first position and a second position, said first position aligning said second plurality of pin chambers with said first plurality of pin chambers, said second plurality of pins removable from said second plurality of pin chambers when said plug body is in said second position.

Abstract: A plunger lock assembly having a removable core is provided. The lock assembly includes a housing defining a first longitudinal bore and a barrel reciprocably mounted within the first longitudinal bore between an advanced position and a retracted position. The barrel defines a second longitudinal bore and is operably associated with a plunger. A core is removable mounted within the second longitudinal bore of the barrel and includes a key slot for receiving an operating key. A drive member is positioned within the second longitudinal bore and is movable from an unlocked position to a locked position by operation of the operating key. A retainer assembly is operably associated with the drive member to axially retain the drive member within the second longitudinal bore such that the core is removable from the second longitudinal bore independently of the drive member. A biasing member is provided for urging the barrel towards the retracted position.

Abstract: A removable thumbturn core assembly which replaces a key core assembly after removing a key cylinder with a control key. The control key feature is preserved for removing the key cylinder.

Abstract: This invention relates to an anti-twist key lock with changeable locking device, the anti-twist key lock having a key lock case, on the circumference of the key lock case having a slit and an opposite inner groove. A locking tumbler set is installed in the key lock case for interlocking the lock bolt and a front plug with receiving groove is inserted into the open end of the key lock case, then using an U-shape locating retainer to insert into the receiving groove of the front plug from the slit on the key lock case to locate the front plug and make it can be rotated freely to prevent the key lock from attacking or twisting to unlock by vandals or thieves, furthermore, the locking tumbler set can be changed by removing the U-shape locating retainer with a special tool.

Abstract: An outside spindle is mounted to an outside handle of a lock to turn therewith. An outer end of the outside spindle includes a slot and at least one engaging piece formed thereon. A core retainer is securely mounted to the outer end of the outside spindle. The core retainer receives and positions a lock core interchangeably mounted in the outside handle. The core retainer includes a longitudinal slot aligned with the slot of the outside spindle, with the lock core extending into the slot of the outside spindle and the longitudinal slot of the core retainer. The core retainer further includes at least one positioning opening for securely receiving the engaging piece of the outside spindle, providing the lock core with a pulling-resisting effect in the axial direction.

Abstract: A lock system comprises a lock core and a token. The lock core comprises a core body, a lock actuator coupled to the core body for rotation about an axis, a blocker movable perpendicular with the axis, and an electromagnetic actuator. The electromagnetic actuator has a shaft that is movable parallel with the axis between a first position in which the blocker is locked to prevent rotation of the lock actuator about the axis and a second position in which the blocker is unlocked to allow rotation of the lock actuator about the axis. The token is couplable mechanically to the lock actuator. The electromagnetic actuator moves the shaft parallel with the axis from the first position to the second position so that the blocker is unlocked if the token has a valid access code.

Abstract: A removable locking plug that is easily inserted and/or removed from the cylinder portion of the locking mechanism. In the preferred embodiment, the plug is enclosed in a case hardened steel housing and contains a tumbler keyed locking mechanism.

Abstract: The disclosed device is directed towards a key operated lock. The key operated lock comprises a barrel defining an interior, the barrel having an alignment block at the interior. A core is insertable into the interior. The core demountably coupling with the alignment block in both a clockwise and a counterclockwise direction.

Abstract: A front loading lock system for office furniture including a lockheader having two openings, a reinforcing channel member attached to the lockheader and also having an opening and a bracing lip, a plastic lock housing which is snap fitted into one of the openings in the lockheader and a lock which is axially inserted into the other of the openings in the lockheader, and into an opening in the lock housing, where the lock is supported by both the lock housing and braced by the bracing lip.

Abstract: A key safekeeping device for fitting into a hole in a door, wall or corresponding structure includes a first tubular element (10) that carries a first collar (12) on an outer end thereof. A lock cylinder (14) is detachably fitted to the first tubular element. A second tubular element (20) that carries a second collar (22) is intended for lockable engagement with the first tubular element. At least one of the collars is comprised of a separate ring-shaped part (22) that includes an internal aperture for receiving a blocking means (24) in the form of a bent/curved element that is intended to be fitted into a peripheral groove (20c) in the barrel surface of the second tubular element. The blocking element, which lies hidden in the aperture of the ring-shaped part, cannot therefore be removed when the key safekeeping device is fitted and the lock cylinder is mounted in place.

Abstract: A rotatable disc having a tubular lock assembly including a tubular sleeve and a number of disc tumblers located within the sleeve. A side locking bar is operative to prevent rotation of the assembly relative to a body, and that bar is rendered inoperative by insertion of a correct key into the lock keyway. The disc tumblers include a number of standard tumblers and a special tumbler. The locking bar is inoperative when each standard tumbler is at a service position of rotation and the special tumbler is at either a service position or a second function position of rotation. A service key is operable to place all tumblers at the service position, and a special change key is operable to place the special tumbler at the second function position to allow removal of the barrel assembly.

Abstract: An assembled lock cylinder comprises a cylindrical core having a cylindrical outer surface and an end face and defining at least one through hole through the wall of the cylindrical core; a connecting plug having a cylindrical portion inserted into the cylindrical core through the end face and defining at least one pin hole extending inwards from the surface of the cylindrical portion; and at least one pin. The connecting plug has at least one protrusion extended outwards from the outer surface thereof that is inserted into the cylindrical core. The cylindrical core has at least one receiving recess sized to receive the protrusion. When the connecting plug engages the cylindrical core the through hole aligns with the pin hole and the pin can be exactly mounted into the through hole and the pin hole, so the connecting plug cannot move axially and circumferentially with respect to the cylindrical core.

Abstract: A removable core lock and key device comprises a cylinder housing (3), a cylinder core (10) accommodated in said cylinder housing, and an essentially cylindrical plug (20) rotatably arranged in the core. A blocking pin (28) is provided in the core and is movable between an extended position, wherein it engages a recess in the cylinder housing, and a retracted position. An actuator element (26a, 26c) is controlled by at least one control pin tumbler. With a control key in the lock, the control pin tumbler displaces the actuator element so that it moves the blocking pin with the rotation of said plug. With a user key in said key slot, said pin tumbler is disengaged from the actuator element and the plug is free to rotate. In other positions the control pin tumbler blocks rotation of the plug and actuator element. A simple yet reliable and secure removable core arrangement is provided.

Abstract: A removable core cylinder having a casing with a cavity, a lock core insertable into the cavity, a cylindrical, rotatable key plug located in a bore in the core, and a retainer member, which is transversely movable in the lock core between a first, locking position and a second, releasing position. The casing has an inwardly protruding locking projection which engages with an axially limited recess in the retainer member when the latter is located in the first, locking position.

Abstract: A removable core lock and key device comprises a cylinder housing (3), a cylinder core (10) accommodated in said cylinder housing, and an essentially cylindrical plug (20) rotatably arranged in the core. A blocking pin (28) is provided in the core and is movable between an extended position, wherein it engages a recess in the cylinder housing, and a retracted position. An actuator element (26a, 26c) is controlled by at least one control pin tumbler. With a control key in the lock, the control pin tumbler displaces the actuator element so that it moves the blocking pin with the rotation of said plug. With a user key in said key slot, said pin tumbler is disengaged from the actuator element and the plug is free to rotate. In other positions the control pin tumbler blocks rotation of the plug and actuator element. A simple yet reliable and secure removable core arrangement is provided.

Abstract: A lock system comprises a lock core and a token having an access code. The lock core comprises a core body, a lock actuator coupled to the core body for rotation about an axis, a blocker movable between a locking position in which the lock actuator is prevented from rotating about the axis and a releasing position in which the lock actuator is permitted to rotate about the axis, an electric circuit having a token reader, and an electromagnetic actuator having a shaft that is movable parallel with the axis. The token is couplable mechanically to the lock actuator. The electric circuit signals the electromagnetic actuator to move the shaft parallel with the axis so that the blocker is movable from the locking position to the releasing position if the access code read by the token reader matches a valid access code.

Abstract: A cylinder assembly for a door lock has a housing, a cylinder, an actuating tongue and a cap. The cylinder is securely held on the housing with a fastener and rotatably received in a through hole in the housing. A recess is defined in one end of the cylinder. A curved channel is defined in a face defining the recess. A connecting portion is formed on the first end of the tongue and is rotatably received in the recess in the cylinder. A protrusion protrudes from the first end of the actuating tongue and extends into the curved channel in the cylinder. The cap is mounted around the actuating tongue and secured to the second end of the cylinder. Accordingly, the cylinder can be easily assembled to or disassembled from the housing by means of attaching or removing the fastener.

Abstract: A lock furnished with a replaceable lock core, in which the inner lock assembly includes a lock core, a sleeve, and a control ring; the inner lock assembly is mounted in a fixed lock casing; the inner lock assembly and the lock casing are assembled together by means of a catch pin; the key normally used for unlocking the lock can only be turned clockwise without hindering the catching function between he inner lock assembly and the lock casing; when an inner lock assembly is replaced, the key should be inserted for unlocking, and then turned counter-clockwise so as to release the catching function between the lock casing and the inner lock assembly; then, pull the key outwards so as to pull out the inner lock assembly simultaneously, and the replacement of a new lock core for the lock casing is done simply.

Abstract: A removable core lock and key device comprises a cylinder housing (10) and a core (20), which is accommodated in the cylinder housing. An adapter (30) is operatively connected to a bolt (32). The core and the adapter are provided with a connection (20d, 30d), such as a bayonet joint, that selectively prevents withdrawal of the core from the housing. Key actuated engagement elements (28, 30c) are arranged to selectively allow mutual rotation of the adapter and the core so as to disengage the connection, thereby allowing withdrawal of the core. A simple yet reliable removable core is thereby provided.

Abstract: 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 be passed through respective aligned openings in a cover plate of the housing assembly, the bolt, and the housing, thereby allowing removal of the rose and subsequent replacement of the cylinder without the need to remove components of the door lock itself.

Abstract: A removable core cylinder lock, comprising a casing, a lock core with a rotatable key plug in a cylindrical bore and a retainer adapted to releasably retain the lock core in an inserted position in the casing. The casing has two lugs extending radially inwards and being separated transversely from each other, whereas the lock core has two corresponding recesses on both sides of a central, rear portion, whereby the lock core can be fully inserted into the casing. The two lugs are provided with holes accommodating fasteners for fastening the casing to an object.

Abstract: In a first aspect, an electronic lock (12) suitable for replacing interchangeable core locks has a solenoid assembly comprising a solenoid coil (280) and a plunger (290) longitudinally aligned parallel to the rotational axis (A) of the cylinder (214) of the lock (12).

Abstract: A casing 20 of a cylinder lock device comprises two pieces of a rear casing 13 for receiving a rotor 22 and a front casing 14 for receiving a key cylinder 21 and a housing 24. The key cylinder and a rotor axially move and rotate upon insertion of a proper key 19 into the key cylinder 21 and subsequent rotation of the key 19. In assemblage of the cylinder lock device, the rotor 22 and key cylinder 21 are connected by a joint means 15 of non-circular section for their integral rotation, and the rotor 22 is connected to the housing 24 by a connecting means 16 for their integral rotation and axial movement. The front casing 14 can detachably be connected to the rear casing 13 by the coupling means 17.

Abstract: 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 screwdriver blade (27a) can be inserted through an opening (34, 35) in the casing to access the screw (27) when the handle is in its operating position, such access being prevented when the handle is in its rest position, by said handle blocking said opening, the handle being lockable in its rest position from said one side of the wing.

Abstract: A shell and core interchangeable lock assembly for use in a shell housing. The core includes a rotatable pin plug and the shell includes a substantially cylindrical body with a pin chest therein. A mechanism which captures the shell and core within the shell housing includes an integral retainer ring and lug which is attached to the core. The mechanism allows rapid insertion and removal of the shell and core by the use of a correctly bitted control key. The mechanism additionally has a sub-mechanism for preventing its operation by accident or by tampering without the appropriate control key.

Abstract: A method and means for releasably connecting the body of an electrical component such as a switch assembly to a support housing that surrounds at least a portion of the body of the switch assembly, for example the tubular body of a key operated lock adapted to operate a switch when a key is turned in the lock. A specially configured spring clip has resilient legs that extend through slots formed in opposite sides of the support housing and into engagement with formations provided on opposite sides of the body of the electrical component not only to maintain a connection between the body and the support housing but also to bias the electrical component into engagement with at least one stop formation defined by the support housing to ensure that the electrical component is properly positioned relative to the support housing.

Abstract: A security replacement cam to prevent the unauthorized removal of a lock cylinder from the lock case. The lock cylinder has an activation cam rotatable by a keyed cylinder plug having a cam surface extension that engages a locking means in the locked case. Security cam replaces the original cam and has a locking mechanism cam surface and a secondary oppositely disposed security cam extension surface that extends beyond the lock cylinder when in locked position. This prevents the lock cylinder from being removed from the case thus blocking access to the lock mechanism by unauthorized users.

Abstract: A vehicle door handle has a support, a lock cylinder, and a handle recess unit. A lock bolt on the support has a release position, allowing mounting and demounting of the handle recess unit, and a securing position preventing demounting. The lock cylinder is bayonet-coupled in the support. A locking member locks the coupled lock cylinder, but can move from a locking into an unlocking position allowing coupling and decoupling of the lock cylinder. A cover is movable between an initial position preventing access to the lock bolt, and an end position, allowing access to the lock bolt. In the unlocking position, the locking member prevents a reversing movement of the cover; in the locking position, it allows a reversing movement. In the end position the cover prevents access to and adjustment of the locking member, but in its initial position allows access and adjustment between the unlocking and locking positions.

Abstract: A detachable lock core has a housing. The housing has an opening, a ridge longitudinally formed thereon a plurality of first apertures defined through the ridge, a plurality of upper pins and resilient members respectively received in the first apertures, and at least one channel longitudinal defined in an inner wall thereof. The body is received in the housing. When a correct key is inserted in the key hole in the body to turn the body, the protrusion is received in the channel to enable the body to be detached from the housing.

Abstract: A lockset assembly comprises an inner handle assembly, a chassis, a latch assembly, an outer spindle, an outer handle assembly of cylinder type, and an outer handle assembly of interchangeable core type. One of the outer handle assembly of cylinder type and the outer handle assembly of interchangeable core type is releasably engaged with the outer spindle to allow an interchange between a cylinder and an interchangeable core via an interchange between the outer handle assembly of cylinder type and the outer handle assembly of interchangeable core type without the need of replacement of a whole lockset.

Abstract: A locking mechanism having a housing with an aperture having at least one notch and providing access to a latching mechanism for a cylindrical lockset having a barrel section with an outwardly projecting tab which may be inserted through the aperture and to engage the latching mechanism being rotatable to engage the tab with the inner surface of the housing inhibiting removal of the lockset. A set screw mounted on the housing is incorporated to prevent rotation of the lockset by engaging a groove in the barrel section.

Abstract: A lock mechanism includes a lock housing having an upper surface with a pair of opposing L-shaped ears, a lower surface with a pair of opposing L-shaped ears, and a front surface with an orifice therethrough. A lock plug cylinder has a face with a key slot therethrough, the lock plug cylinder received within the lock housing through the orifice in the front face. A mounting bracket has a front face with an orifice, a pair of laterally disposed flanges projecting from the front face, and a pair of retaining flanges projecting substantially perpendicularly from the front face. The lock housing is received between the retaining flanges in such a way as to have the retaining flanges received by respective upper and lower opposing ears.

Abstract: A dual-function lock in accordance with the invention has an axis-defining lock sub-assembly including first and second axially aligned rotator members having confronting first end faces and oppositely facing second end faces. The sub-assembly has a lost-motion recess and an anchor recess on one confronting face and one recess-engaging member extending from another confronting face to permit lock function selection by placing the recess-engaging member into a particular recess. Alternative dual-function lock sub-assemblies include a unitary rotator bolt and a companion actuator. The rotator bolt has a release-mechanism-engaging portion and an actuator-engaging portion. While a first section of the actuator-engaging portion permits limited lost-motion between the rotator bolt and a companion actuator, a second section prevents lost-motion. The lock function can be selectively determined by placing the companion actuator into the desired first or second section of the actuator-engaging portion.