Abstract: A cylinder lock utilizing an unlocking code to set at any desired time after the cylinder lock has been assembled and which, before the setting of the unlocking code, allows the rotor to be rotated for the purpose of inproving the efficiency of the automotive assembly work. The cylinder lock includes a rotor in which tumblers are installed, is rotatably inserted in a cylinder case, the tumblers following a code forming portion of an inserted key plate to form a lock-side unlocking code that matches a key-side unlocking code defined by the code forming portion. The tumblers are put in a state where the lock-side unlocking code is formed, in response to an identification portion formed in the key plate.

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 lock enhancement arrangement for protecting a cylinder lock, from being damaged by an axial tension is disclosed. The lock enhancement arrangement comprises a lock body having a lock channel defining an axial lock cavity and an axial reinforcing cavity, a lock unit which is adapted for actuating a latch assembly, comprising a lock cylinder disposed in the lock cavity for a corresponding key to actuate the latch assembly and a pin seat radially extended from the lock cylinder at a position within the reinforcing cavity, and a retention member, having an axial retaining slot, securely supported within the reinforcing cavity, wherein the pin seat of the lock unit is substantially engaged with the retaining slot of the retention member to block an axial movement of the lock cylinder within the lock cavity so as to substantially retain the lock unit within the lock channel of the lock body.

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: A lock includes a control knob with a keyway and a receiving space defined in a distal end face of the control knob to correspond to the receiving hole of the sliding seat. The sliding block is able to selectively be received at a joint of the control knob and the sliding block to allow movement of the control knob to drive the latch to move accordingly.

Abstract: A throw member having a first and second hub located along a blade that couples the rotation of the core cylinder with the rotation of the key cam of a lock chassis to lock and unlock a lock assembly. The two hubs are spaced apart to receive a catch. The catch constrains the throw member from releasing when the core cylinder or door lever is exchanged or modified. In addition, the two hubs enhance the throw member's ability to prevent unauthorized removal of the door lever. One of the two hubs includes a passage to release the throw member from the catch.

Abstract: A key cylinder selectively locks and unlocks a lock mechanism. The key cylinder has a rotor and a lever. The rotor is rotated by a key. The lever connects the rotor to the lock mechanism. The key cylinder has a recess formed in an end of the rotor. An end portion of the lever fits in the recess. A cushion is located between the basal end of the lever and the recess. The cushion holds the lever such that an axis of the lever and an axis of the rotor forms an angle within a predetermined range of angles.

Abstract: A lock has an outer housing, which has an outer slot at an interior side. An inner housing is received in the outer housing for rotation and has an inner slot and a driving section. Three locking plates are received in the inner housing, each of which has and a recesses at a periphery thereof. A movable pin is moved to be received either in the inner and outer slots or in the inner slot and the recesses. A first tumbler pin is provided at the outer housing and has an end received either in the annular slot or in the position slot. The inner housing is reciprocated between a first position, in which the position pin is moved to a position slot to restrain the inner housing from rotation, and a second position, in which the position pin is moved to an annular slot to release the inner housing.

Abstract: A casing structure for a cotter-pin type lock core is consisted of a semi-cylindrical casing which defines a longitudinal axis. The semi-cylindrical casing includes a first sidewall, a first side edge, at least one first engaging portion, a second sidewall, a second side edge and at least one second engaging portion. The first engaging portion and the second engaging portion are extended from the first side edge and the second side edge respectively, and adapted to engage with the lock core. The first side edge and the second side edge are opposite and define a maximum diameter. And the first engaging portion and the second engaging portion define a width that is slightly smaller than the maximum diameter defined by the first side edge and the second side edge.

Abstract: A padlock including a lock body (1), a lock shackle (2) movable between locking and releasing positions, and, inside the lock body, bolt means (5) for securing and releasing the shackle (2) in its locking position, and a cylinder lock mechanism (3) for controlling the bolt means (5). The cylinder lock mechanism (3) is replaceably mounted in a separate casing-like fixing unit (6), which is detachably fixed to the lock body, (1). The fixing unit (6) has inner guiding surfaces (6c), which correspond to the outer shape of the cylinder lock mechanism (3, 3′, 3″), to provide both radial and axial support for the cylinder lock mechanism (3, 3′, 3″).

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 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 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 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 push-lock includes a body. The body is formed with a channel having a pair of portions. A cylinder is movable in the body between a front position and a rear position, and has a latch rotatably connected thereto. The latch defines two opposed cutouts in a periphery thereof. A clip has a pair of shanks resiliently flexible in the portions of the channel. The shanks normally abut the periphery of the latch. A spring is provided for moving the cylinder back to the front position. Additionally, the latch can be turned relative to the cylinder in such a manner that the shanks snapped in the cutout may be pushed outward by the turning latch till the shanks fully slide out of the cutouts and abut the periphery of the latch again.

Abstract: Pop-Up Indicator, Replacement Lock-Cylinder with distinctive keys for owner, employee (or acquaintance), and some third party whose right to enter is legitimate only upon notice or in an emergency. The pop-up indicators are brightly and differently colored. The lock cannot be circumvented by pressing a pop-up in and endeavoring to turn the key, because the pop-up's barrel blocks rotation of the lock's core unless the pop-up is fully extended. Once triggered, the pop-up remains visible and in locked position until the lock owner resets it. A tactile indicator of sought entry is transmitted to the owner upon key insertion and rotation, as well. Meanwhile, the employee and/or third party enjoys unimpeded access. The owner will thus know whether the employee has been over—to inspect for termites, walk the dog, etc.—and the third party cannot allege lockout lease breaking. The lock operates quite normally with either or both pop-ups triggered.

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 locking head is composed of a body and a casing. The body has a locking core with a keyhole. A locking hole is defined at an outer periphery of the body. The casing is composed of a housing and an end cover. The body is inserted into the housing through a large opening in one end of the housing and the housing has an small opening defined in the other end. A latch opening is defined through the housing and aligns with the locking hole. A plurality of catches is formed in housing and extends out from the large opening. The end cover has a hole aligned with the keyhole and a plurality of slots defined in an inner wall. The catches are respectively attached to the slots to attach the end cover to the housing and securely hold the body in the casing.

Abstract: A keyed knob assembly (10) having a knob portion (12), a knob insert (14) partially received within a bore (18) formed in the knob portion (12) and a shank portion (16) partially covering the knob insert (14) is disclosed. A throughbore (48) formed in the knob insert (14) is provided which operably supports a locking cylinder assembly (42). An axial channel (50) formed in the shank portion (16) terminates at a radial slot (52) to provide a means for releasably coupling the knob,assembly (10) of the present invention to a catch (54) of a lever catch subassembly associate with the chassis of the lockset.

Abstract: A removable core cylinder assembly utilizes a plurality of modular parts to create a key-removable interchangeable core which will fit all existing interchangeable core locks of this kind. The removable core cylinder assembly includes accessories of a removable face plate which covers an axial recess in the cylinder shell for the locking tab and provides shelter to the head of the cylinder plug, and which is protected from removal from the cylinder shell by two stepped portions of the cylinder plug; and a key which includes a stop at the end of the tip of the key blade.

Abstract: By operationally mounting a plurality of wafers or plates forming tumblers in an independent, separate, substantially closed container, and cooperatively mounting the plate tumbler container with a cylinder forming member, a unique cylinder lock system is attained which is easily and inexpensively manufactured, as well as quickly and easily re-keyed whenever desired. In the preferred embodiment, all of the plate tumblers which are desired for the particular lock construction are mounted in the substantially closed container, with each plate tumbler having the requisite spring means associated therewith. In addition, the plate tumbler holding container incorporates one aperture for each plate tumbler which allows the slot engaging fin of each tumbler to extend outwardly from the container for locking and unlocking association with the housing.

Abstract: A cabinet includes a top panel, a first side panel, a second side panel, a rear panel, an interior base panel and a door which together define an interior cavity. The cabinet also includes a hinge assembly for hingedly connecting the door to the first side panel so as to enable the door to pivot between a closed position and an open position. The hinge assembly includes a bracket coupled to the interior surface of the first side panel and a butt hinge coupled to the bracket and to the interior surface of the door. The butt hinge includes a first leaf which is fixedly secured onto the bracket and a second leaf which is fixedly secured onto the interior surface of the door, the first and second leaves being capable of independent rotation about a pivot bar.

Abstract: The front end (7b) of the plug (7) of a cylinder lock is covered by a profiled element (5) which includes a key hole (6) whose profiled shape will only permit certain individual keys of a family of keys that can be inserted into the plug also to fit the profiled element. The profiled element includes attachment elements (5b) that have U-shaped engagement surfaces (7b') which co-act with corresponding engagement surfaces (7c) on a front part (7b) of the plug. The profiled element can be fitted to the lock in place, by turning the profiled element perpendicular to the plug axis. The profiled-element attachment elements (5b, 5b'; 7c, 7c') are inaccessible from outside the lock when the cylinder lock is fitted in place.

Abstract: A locking mechanism includes a lock mount (10) and a lock core (50). The lock mount (10) includes front and rear mount faces (15, 14) and an inner mount wall (17) which defines a core-receiving chamber (18) extending from the front mount face (15) to the rear mount face (14). The lock core (50) is slidably mounted within the core-receiving chamber (18) of the lock mount (10) and is movable between a projected position and a retracted position. The lock core (50) further includes a core body (52) and an outer core surface (49) defining a core boundary. The lock core (50) further includes a lock lug (75) coupled to the core body (52) and movable between a first lug position outside the core boundary and a second lug position within the core boundary and a travel limit stop (90) coupled to the core body (52) and movable between a first limit stop positioned outside the core boundary and a second limit stop positioned within the core boundary.

Abstract: A removable core cylinder assembly which utilizes a plurality of modular parts to create a key-removable interchangeable core which will fit all existing interchangeable core locks of this kind.

Abstract: To prevent a key cylinder from being punched out of an automotive door or the like and to simplify assembly, a stepped key cylinder retention cavity structure that is rigid with an outer panel of the door, is arranged to extend into the interior of the door. A key cylinder is disposed in the cavity from outside of the door so that a shaft that rotates synchronously with a rotor of the key cylinder, extends through an opening formed in an inboard end of the cavity and is connected to a key lever through a lost motion connection that allows for key backlash. The key lever is connected to the cavity structure by resilient barbed members that can be pressed in through the opening from the interior of the door. The barbed members snap into a locking position in suitable recesses formed in the structure. Rotation-limiting projections that are rigid with the structure are provided to limit the amount of rotation of the key lever.

Abstract: A padlock includes a lock base formed with first and second shackle insert holes, a lock receiving space which is disposed between the first and second shackle insert holes and which has an upper section communicated with the second shackle insert hole, and a ball chamber which extends transversely between the first shackle insert hole and the upper section of the lock receiving space. A lock device is received in the lock receiving space, and has an axially rotatable key-operated lock core which is provided with a plunger formed with a latch projection. A locking unit includes at least one ball member rollingly disposed in the ball chamber adjacent to the plunger. A shackle has longer and shorter leg portions to be received in the first and second shackle insert holes, respectively. The shorter leg portion is formed with a plunger engaging groove for engaging the latch projection of the plunger. The longer leg portion is formed with a ball retaining groove for engaging the locking unit.

Abstract: A locking device for control cabinet doors has a plate with a depression attached to an outwardly facing side of a door leaf. The pivot lever is positioned in the depression. A projection is connected to a face of the plate facing the door leaf, the projection extending through a cutout of the door leaf past an inwardly facing side of the door leaf. A cap is connected to a free end of the projection, wherein the cap and the projection define a receiving chamber. A lock for locking the pivot lever when folded into the depression is provided. A housing matching the design and size of the lock is provided. The lock is enclosed and secured in the housing. The housing is exchangeably positioned in the receiving chamber. The plate has a receiving opening for providing access to the lock. The receiving opening has a periphery matching the shape of the housing.

Abstract: A key lock tumbler cylinder is selectively removed with an extraction key that is longer than a normal operating key. The last tumbler plate in a tabular cylinder series along the cylinder key slot projects into an arcuate channel in the cylinder cavity wall of the lock body. This arcuate channel does not junction with the lock tumbler plate channel but does intersect with a second channel in the cavity wall that is angularly displaced about the cylinder axis from the tumbler plate channel. However, the second channel is more shallow than the arcuate channel to confine the tumbler cylinder within the body cavity when rotated by the operating key which does not engage the last tumbler plate key aperture. A second, tumbler cylinder extraction key that is longer than the operating key includes an edge bit at the end of the key for cooperating with the last tumbler plate key aperture.

Abstract: A lock assembly is provided which includes a shell having a front end, a rear end, and a central bore extending from the front end to the rear end. The lock assembly also includes a key operated plug axially aligned and rotatably and removably disposed within the central bore of the shell. The lock assembly further includes a cam module rotatably mounted on the rear end of the shell. A key is provided which is insertable into the plug and allows for the removal of the plug from the shell. When the key operated plug is removed from the shell, a tool can be inserted through the central bore in the shell and into the cam module for rotationally moving the cam module relative to the shell, thereby unlocking the lock assembly.

Abstract: A lock has a rotatable member (24), a latch member (22) operatively connected to the rotatable member for movement between locked and unlocked positions when the rotatable member is turned, a key stop (38) having an end facing toward an exposed end of a casing (10) that defines, together with the end of the rotatable member facing toward the exposed end of the casing a dead-end wall. Key stop (38)is mounted for axial reciprocation in, and for combined rotation with rotatable member (24) and has in the end facing toward the exposed end at least one code socket (46, 48) offset with respect to the axis of rotation of the rotatable member. The lock also has a rotatable spring-loaded block (54) mounted between the exposed end of the casing and the end of the key stop. The block is held in the casing against axial movement and has a substantially diametrical key slot (72) angularly offset with respect to the code socket. The key stop is axially pressed against the rotatable block by a spring (42).

Abstract: A pin tumbler lock has a rotary plug with three rows of tumbler pin mounting holes to accommodate a large number of tumblers. Rotational control of the plug is by means of a stop plate carried on a stem which is an integral extension of the plug. The lock cylinder has a rearwardly extending tab having its opposite side edges in registration with stop surfaces on the stop plate to limit the plug motion in two directions. The lock may be shortened by such provision of exterior rotational control to provide a shortened locking dimension and/or to accommodate a substantial number of pins and tumblers.

Abstract: A locking handle for an access door includes a housing with a cam rotatably mounted within the housing. The cam is connected to a locking pin for the pin to move transversely in response to rotational movement of the cam. A locking bar is slidably received on the housing and moved to a locked position to prevent rotation of the cam.

Abstract: A lock mechanism has a cylindrical housing with an axial bore therethrough, and a key-controlled core rotatable within the bore between locked and unlocked conditions and removable from and installable in the bore in the unlocked condition. The core has a plug at its rear end which is mateably engageable in a socket on the front face of a shifter, for rotating the shifter within the bore in response to rotation of the core, and thereby operating a latch member coupled to the shifter. A radial tab on the housing is receivable in an arcuate groove formed in the outer surface of the shifter for limiting rotation of the shifter to facilitate retention of the shifter in the single rotational orientation upon removal of the core from the housing. An O-ring on the shifter frictionally inhibits rotation thereof.

Abstract: A cylinder shaft projects from a key cylinder along the center line of a sleeve, and first and second case shafts project from a case. A spring is coiled on the first case shaft, and the cylinder shaft is placed between the first and second case shafts. The cylinder shaft and the second case shaft are placed between both legs of the spring. When the key cylinder is rotated with respect to the sleeve by the proper key being inserted in the key cylinder, the spring imparts returning force to the cylinder shaft that is making an arcuate movement in a circular-arc groove formed in the case.

Abstract: A retainer assembly for attaching a lock cylinder to a door panel, the lock cylinder having a length and a plurality of radially spaced flanges disposed on and raised outwardly therefrom. The retainer assembly comprises a retainer clip having at least two laterally spaced apart flanges, the at least two laterally spaced apart flanges preventing rotational movement of the lock cylinder when the lock cylinder is engaged with the retainer clip. A base is provided having a first side, a second side, and an open-ended slot. The base is connected to the retainer clip at the second side. The open-ended slot is provided for slidingly engaging the lock cylinder such that upon engagement of the lock cylinder, the base flatly abuts against the door panel on the first side and the retainer clip abuts against the plurality of radially spaced flanges of the lock cylinder.

Abstract: A key 20 is formed with a blade 22 having six bits 30, 32, 34, 36, 38 and 40 formed along one edge of the blade. A shoulder 42 is formed on a trailing end 28 of blade 22 and is positioned to cooperate with a front face 82 of a plug 50 of a five-pin cylinder lock 46 to locate bits 30, 32, 34, 36 and 38 adjacent five respective sets of tumbler pins in the operation of the lock. Key 20 can also be used with a six-pin cylinder lock 110. Shoulder 42 is moved through a slot 130 in a front face 134 of a plug 114 of lock 110 and engages a stop surface 132 whereby bits 30, 32, 34, 36, 38 and 40 are properly positioned adjacent six respective sets of tumbler pins in the operation of the lock.

Abstract: A simplified latch for luggage, cases and the like has a tubular bolt with an eccentric cam engaging beneath an over-hanging tab of a base to which the lever plate is connected by a linkage when that tubular cam is rotated by insertion of a key in a key shaft within the tubular bolt and fixed axially with respect to the lever plate.

Abstract: A lock having a housing and flange, a lock cylinder, a cam lever, and a lock nut. The housing has a length which is slightly less than the thickness of the panel into which it is to be inserted. Its exterior surface has axial ridges which engage with the inner surface of the panel hole in which the housing is inserted. The ridges preferably extend only a short distance from the flange. These ridges hold the housing in place and prevent it from turning in the panel hole. The lock cylinder, which fits within the housing, has a threaded portion extending outwardly to receive the cam lever and the lock nut. Tightening up on the lock nut serves to draw the housing fully into the hole and to clamp the housing in place. The lock cylinder is keyed to the inner surface of the housing; and the cam lever is keyed to the threaded portion.

Abstract: A key lock mechanism which can be made entirely of molded plastic parts having (1) a lock shell that can be snap fit in a mounting opening, wherein the shell is a predominantly cylindrical casing having a front end, a rear end, and an interior longitudinal channel; and (2) a lock plug, having a front end and a rear end, longitudinally housed within and rotatable about the longitudinal axis of the shell. The front end of the lock plug has a keyway allowing the insertion of a key to operate a double-acting, bar tumbler having a rocker body with a front peg and rear peg; an integral axle perpendicular to and connecting the center rocker body to a left and a right pivot pad upon which the bar tumbler pivots. The insertion of the key pivots the bar tumbler within the longitudinal shell channel and enables the key to turn the plug within the shell to operate the lock. The rear end of the plug receives a snap on actuation means such as a cam.

Abstract: A cylinder lock device (10) includes a lever (15) rotatably disposed between a casing (11) and a key cylinder (13), and a blocking member (17) disposed within a notch (16) formed in the lever (15). A concavity (18) are formed on an inner wall of the casing (11), and a chamfer (19) is formed on the key cylinder (13). When the lever (15) is in the locked position and the key cylinder (13) is further rotated to the dead-locked position over the locked position, the blocking member (17) moves away from the chamfer (19) of the key cylinder (13) and into the concavity (18) of the casing (11). When the key is pulled out from the key cylinder in the dead-locked position, the locking device is forcibly maintained in the locked position to prevent unauthorized unlocking.

Abstract: A lock is disclosed which includes a housing having an inside bore, a cylinder selected from a group consisting of interchangeable core cylinders and insert cylinders, the cylinder having an outer contour, the inside bore of the housing being at least as large at any point as the outer contour of the cylinder, and a device for adapting the inside bore of the housing to correspond to the outer contour of the cylinder. Also described is a transmission assembly mounted to the housing and cooperating with the cylinder to impart desired motion to a latch mechanism of the lock. An advantage of the lock is that it may accommodate distinctively different cylinder types with different form, fit and function.

Abstract: An attachment (9) which transforms a lock cylinder having a cylinder housing (30), an aligning bracket (27), and a cylinder core 41a into a lock cylinder with an interchangeable core (40a). The interchangeable core (40a) is held in place and is attached to the interchangeable attachment (9) using a conventional cylinder core nut (21). With a control key (50) inserted into the cylinder keyway (42) within an interchangeable core (40a), a push rod (51) comes into contact with a plunger head (19) at the front end of the plunger (11). The plunger (11) is pushed back, allowing the locking balls (13) to recede into the inward position; at this point, the only thing holding the interchangeable core lock cylinder (40a) in the cylinder housing (30) is the security back-up pin (14). With the control key (50) inserted, turn right five degrees and pull. The interchangeable core lock cylinder (40a) will come out. A new interchangeable core lock cylinder (40a) can be inserted using the same procedure.

Abstract: A barrel lock includes a circumferential axial pin tumbler arrangement housed in the barrel. A removable pilot post is disposed among the tumblers and has key-guides which register with mating key-guides on an actuating key. To change the lock combination, the lock can be reassembled with the pilot post located in a new rotational orientation relative to the tumbler arrangement. A particular application includes locking merchandise compartments in vending machines, for example.

Abstract: A cylinder lock is provided which comprises a cylindrical housing; a core which is rotatably mounted in the housing, thereby defining a shear line; a first tumbler slidably disposed in a first aperture; means for moving the first tumbler between a locked and an unlocked position; a second tumbler slidably disposed in a second aperture; and means for moving the second tumbler between a locked and an unlocked position. When the lock is in the locked position, the first tumbler extends across the shear line into the first aperture of the core. When a correct key is inserted into the keyway, the first tumbler is urged completely into the core below the shear line. The second tumbler is arranged such that when the lock is in the locked position, the second tumbler extends across the shear line and such that when the correct key is inserted, the second tumbler is urged completely into the housing above the shear line.

Abstract: A padlock configured to accept a removable lock core is provided with a shackle and bolt mechanism for locking the shackle. The bolt mechanism is configured to be retainable in the padlock case during shipment of the padlock without its removable lock core. In addition, a tool is provided for releasing and removing the bolt mechanism easily from a secure position inside the padlock to disassemble the padlock for repair.

Abstract: A door handle assembly includes a hollow knob shell, a lock core having a front end formed to include a keyway opening, and a unitary core retainer sleeve situated inside an interior cavity of the knob shell. The unitary core retainer sleeve is formed to include means for supporting the lock core inside the interior cavity so that the front end of the lock core is positioned to lie in a front opening of the knob shell to permit a user to insert a key into the keyway opening.

Abstract: A low profile high security latch 22 is provided comprising inner and outer housing portions 28, 30 defining a common bore 32 in which a shaft 42 moves rotationally and transistionally responsive to an attached handle 40, the housing outer portion 30 is outwardly recessed to receive the handle 40 protectively in reduces profile.