Abstract: A cylinder lock set includes a retaining tumbler which has a cammed outer tip adapted to be received in a receptive slot such that the cylinder may be rotated in the slot to engage the cammed outer tip of the retaining tumbler and cam down the tumbler into the cylinder to provide clearance between the slot and the cylinder for facilitating insertion of the cylinder into a receptive sleeve.

Abstract: Substitutable plug assemblies are removably retained at an operating position within a forwardly opening chamber of the barrel of a lock assembly. A plug assembly that has been inserted to the operating position is releasably retained within the enshrouding barrel by a retainer that is moved by spring bias to a plug-retaining position wherein the retainer bridges complementary formations that are defined by the barrel and by the inserted plug assembly. A retained plug assembly that has been inserted to the operating position can be rotated about the central axis relative to the barrel between at least a pair of angularly spaced positions. One of the plug assemblies carries tumblers that are engageable with interior portions of the barrel for locking the one plug assembly in at least one of the angularly spaced positions unless the one plug assembly is unlocked by a suitably configured key. The other of the substitutable plug assemblies preferably includes a manually operable formation such as a knob.

Abstract: A bitted substantially rigid extension adapter is provided which may be applied to an existing operating key thereby forming a control key assembly. The extension adapter is provided with fasteners for secure attachment to an operating key. The extension adapter may be made of metal. The bitted portion of the adapter may activate one or more control tumblers in a removable locking core housed within a locking mechanism. The adapter and key, when combined, may be used to remove the locking core from the mechanism.

Abstract: A transverse retaining plate in the lever handle shank fits in a circumferential groove on the inside of the handle body and holds the lever handle on the shank. A key cylinder in the body handle has a bible which fits in a longitudinal slot in the handle. A resilient block is disposed in the slot in a position between the bible and the shank hub to hold the cylinder in position. The block also serves as a spring, biasing the retaining plate toward the groove.

Abstract: To provide lock servicing of particular door locks in common use, a bypass key (1) with key blade (2) long enough to reach through a lock-cylinder plug (26 and 45) and low enough to pass under extended tumblers (37) of a lock cylinder (28 and 43) in order to dislodge a tailpiece (36) from a stop-washer (63 and 45) or other attachment means at an inside end of the plug is provided in conjunction with a control key (14 and 21) with a key blade (13) of the same length into which single-lock and multiple-lock profiles (15) can be made to rotate the lock plug (26 and 45) and disengage or engage a lock cylinder (28 and 43) and its means of attachment to a door lock (54).

Abstract: A rekeyable cam lock has a plug rotatably received in a cylinder. The plug has a keyway and pin tumblers and is provided with a circumferential groove rearward of the pin tumbler. The cylinder has a bore to receive the plug and a pair of transverse holes to receive a U-shaped clip in registration with the plug groove. The clip engages the groove, permitting rotation of the plug but preventing its removal from the cylinder. When the clip is removed from the holes, the plug is forwardly removable from the cylinder to facilitate rekeying of the lock.

Abstract: A re-keyable lock has a forwardly removable cylinder and plug assembly. The cylinder and plug assembly is removably secured to the lock by a setscrew. The setscrew can be removed with conventional and readily available tools. An alignment structure is provided to facilitate alignment of the cylinder and plug assembly with the lock.

Abstract: A re-keyable lock has a forwardly removable cylinder and plug assembly. The cylinder and plug assembly is removably secured to the lock by a setscrew. The setscrew can be removed with conventional and readily available tools.

Abstract: A lock includes a lock housing and an interchangeable core including a core body, a core sleeve, and a key plug having a key slot. A bridge member is provided on a flange of the key-way disc to cover a portion of the longitudinal opening of the key slot in the key-way disc. In one embodiment, a cylinder cap is threadedly mounted on the lock cylinder housing to protect the core and a key-way disc is mounted in the cylinder cap to protect the key plug while still permitting insertion of an operating key into the key slot of the key plug. A spin-free pin is mounted for free rotation in the lock cylinder housing for blocking rotation of the protective cylinder cap in relation to the lock cylinder housing. A setscrew is provided in the lock cylinder housing to urge the spin-free blocking pin into rotation-blocking engagement with the threaded cylinder cap. In other embodiments, the cap is mounted on the lock core for removal therewith by a control key from a lock cylinder housing or a padlock case.

Abstract: A lock apparatus includes a lock provided with a cylindrical plug having a set of blind holes angularly spaced from the set of pinways in the plug. A longitudinal slot through the center of the blind holes accepts a programming member that lifts one or more master pins out of the blind holes and into housing pinways when the lock is unlocked with a master key and the plug is rotated into a rekeying position to align the blind holes with the housing pinways. The programming member has a hole or notch near its front end to facilitate removal when the lock is unlocked and the plug is in the rekeying position. The programming member may be in the form of a set blade or a set rod, and may be reversible end-to-end to provide additional rekeying combinations.

Abstract: A changeable key plug type padlock including a padlock body formed as an upper body section and a lower body section defining a pair of companion relatively displaceable body sections having correspondingly shaped outer peripheries in cross-section forming continuations of each other in aligned registered relation. The padlock casing has laterally spaced sockets disposed partially in both companion body sections opening through the upper portion of the padlock body for receiving legs of a shackle and a central substantially cylindrical plug cavity located between the sockets.

Abstract: Dead-bolt locking apparatus includes a door-carried dead-bolt mechanism having oppositely projecting dead-bolts on dual aligned slides, and a key-controlled cam-lock unit receivable in a cavity in the dead-bolt mechanism. The cam-lock unit is inserted into the cavity with the lock of the cam-lock unit "unlocked", developing balanced outward thrust on the door-securing dead-bolt slides. Locking the cylinder lock then secures the cam-lock unit against removal and thereby locks the dead-bolt apparatus.

Abstract: A piston type lock employs stepped diameter pistons or pins and bores to prevent fallout of pins on disassembly and also multilevel surfaces at the lock rotor and housing interface such that one or more of the pins serve to retain the rotor in the housing in the unlocked condition of the lock.

Abstract: A sliding glass door lock having a ratchet locking bar fastened to one sliding door, and a locking mechanism having a housing forming an abutment engaging the other sliding door. A window is formed in a base plate of the housing which lies adjacent to the door in the locked position and allows access for release and replacement of the cylinder lock when the lock is unlocked.

Abstract: A padlock, which comprises a lock casing and a basically U-shaped shackle slidable therein between a closed and an open position. The shackle has two legs of different length, of which at least one is provided with a locking notch. The padlock also comprises a cylinder lock mechanism, operable by a key, and at least one locking member coacting with a guiding portion of a turnable member of the cylinder lock mechanism for locking the shackle to the lock casing. The locking member is movable dependent on the angular position of the guiding portion of the cylinder lock mechanism between a locking and a releasing position. The releasing position allows the shorter shackle leg to completely slide out from the lock casing. A retaining member is attached to the lock casing in order to keep the cylinder lock mechanism properly fitted in the lock casing. The removal of the retaining member from the lock casing requires turning of the retaining member in relation to the lock casing.

Abstract: A locking device for securing a bicycle or the like to a post or other fixture. The locking device features a replaceable lock cylinder, which in turn allows for both replacing merely the lock cylinder when the keys get lost and also allows for conforming the lock cylinder of the device to an identical lock cylinder used in the owner's home so that one key, preferably a flat key, services both the device and the home. The lock cylinder cannot, however, be removed when the device is locked and in use. The key, on the other hand, can only be removed when the device is locked.

Abstract: A lock assembly features a removable cylinder plug. The cylinder plug is rotatably disposed in an outer body portion of the lock assembly that is itself movably positionable in a lock housing. The removable plug is only removable when the outer body portion of the assembly is disengaged from the housing. The body portion is disengageable when the inner plug member is rotated within the body portion after insertion of a key.

Abstract: A front removable lock for office furniture units, and the like, comprises a housing having an rear plug rotatably mounted in a rear portion of the housing. A front plug, having key operated tumblers, is telescopingly received within a front portion of the housing, and includes a latch mechanism which detachably connects the same with the rear plug. A release is mounted on the rear plug to uncouple the front and rear plugs, and is accessible through a window in the housing when the plugs are rotated into a partially unlocked position. A gate is mounted on the rear plug adjacent to the release, and is positioned such that the gate closes the window when the plugs are rotated into a locked position to prevent unauthorized access to the lock.

Abstract: A stop disposed in the bottom of the shackle heel bore normally blocks movement of a pin holding the cylinder in the casing. Raising the stop when the lock is unlocked permits the pin to move away from the cylinder freeing the cylinder for replacement.

Abstract: A steering lock for motor vehicles which consists of a lock cylinder, of a housing and of a cover sleeve of tough material at least partially surrounding the housing, which is adjoined by a cap arranged within the area of the end face of the lock cylinder and which is provided with a recess along the inner wall, into which engages a safety catch against unauthorized removal of the cover sleeve; for the disassembly of the lock cylinder, the safety catch can be disengaged in a predetermined position of the key and therewith of the rotor of the lock cylinder; the cover sleeve is fastened to the housing by a threaded connection secured against an unscrewing and surrounds with play by means of a radially inwardly directed rim, a thick-walled cap retained at the front face of the rotor; the cap in turn is provided only with a closely fitting opening for the insertion of the key.

Abstract: A cylinder lock assembly is disclosed which comprises an outer cylinder having a front end with a key hole and a rear end with an end member. The outer cylinder encloses a rotatable inner cylinder. The end member and the outer cylinder are provided with mutually corresponding groove arrangements forming an axially fully interlocking attachment, between these two parts. The end member is insertable in a radial direction into the outer cylinder for attaching it thereto. The assembly also includes an attachment locking member engaging the outer cylinder and the end member in order to lock the end member to the outer cylinder in radial direction. The assembly can also be provided with a latch member arranged to move radially guided by the end member and the outer cylinder. The latch member may also serve as a fastening member of the assembly.

Abstract: A storage container in a piece of office furniture, such as a desk, is provided with a security lock which can be removed and replaced with another lock only by means of the original key for the lock. A releasable catch mechanism holds the lock housing firmly in a receiving well for the lock. Access to the catch is blocked by a covering member which can be moved away from its covering position only by movement of the lock mechanism with the original key. Thereupon, the catch can be released and the lock pulled out of its receiving well.