Abstract: A lock has a locked condition and an unlocked condition comprising a barrel with a circular bore having three splines. A cylindrical plug is adapted to reside in the bore. First, second and retaining tumblers are positioned in tumbler slots, with the first and retaining tumblers biased in one direction toward the first spline and the second tumbler biased in the opposite direction into the second spline. When a first key is inserted, the first and second tumblers are moved against the bias so they retract from the respective splines and the plug can be rotated from the locked and unlocked conditions. When a second key is inserted while in the unlocked condition, the first, second and retaining tumblers are moved so the respective tumblers are either positioned in the third longitudinal spline or fully retained in the plug and the plug can be retracted axially from the barrel.

Abstract: A lock includes an electrically powered locking mechanism operable between locked and unlocked positions, a power supply, and a controller for operating the locking mechanism between locked and unlocked positions. The controller regulates the amount of electric power supplied to the electrically powered locking mechanism and determines temperature in the vicinity of the locking mechanism, and is capable of supplying first and second levels of electric power to the electrically powered locking mechanism in accordance with the temperature in the vicinity of the locking mechanism. If the temperature in the vicinity of the locking mechanism is within a predetermined temperature range, a first level of electric power is supplied to the electrically powered locking mechanism to operate between locked and unlocked positions. If the temperature is below the predetermined temperature range, a second, lower level of electric power is supplied to the electrically powered locking mechanism.

Abstract: The invention relates to a key (1) for locking a cylinder lock, comprising at least one first surface (2) and at least one second surface (2?), with sensing positions (4) provided along the longitudinal extent of the key (1), wherein at least one code (3) is provided on the first surface (2) and wherein at least one further code (3?) is provided on the second surface (2?), the codes comprising control points (6, 6?, 7, 7?) at the sensing positions (4) that are provided transversely to the longitudinal extent of the key (1) and arranged at certain control heights (5), wherein at least at one sensing position (4) at least one control point (25, 25?) has a different dimension, preferably a larger diameter, on the two surfaces than a control point (6, 6?, 7, 7?) at another sensing position (4). The invention also relates to a lock for such a key and a system made up of at least two locks and at least one key.

Abstract: A high security locking system comprising a deviated key and a lock housing. The lock housing may further comprise a face plate with a keyhole for receiving the deviated key and first pin slots disposed within the lock housing. The high security locking system may comprise a lock cylinder disposed within the lock housing and include second pin slots disposed within the lock cylinder. An idler block may be disposed within the lock cylinder and may be rotatable, which may allow the deviated key to align with one or more of the second pin slots in the lock cylinder. Additionally, a stationary block may be disposed within the lock cylinder and the deviated key may rotate around the lock without interfering with the stationary block.

Abstract: A lock includes a first lock part and a second lock part which is rotatably arranged in the first lock part and includes a plurality of lock elements for cooperation with the first lock part and a key. First and second groups of lock elements have a first position relative to the second lock part absent actuation of the key and are moved from the first position into a third position via a second intermediate position, and to prevent rotation of the second lock part in a first position. The lock elements in the first group are arranged to prevent rotation of the second lock part from a second position and, in the third position, allow rotation of the second lock part. Likewise, each lock element in the second group allow rotation of the second lock part and, in the third position, prevent rotation of the second lock part.

Abstract: A lock device (10) is used with a flat key (K) having asymmetric opposite edges (3, 4). The lock device (10) includes a key rotor (14) which is configured to have distances from a central axis line (O2) of the key (K) to abutment points of the edges (3, 4) against the tumbler (32a-32c) respectively, and the distances are set so as to equal each other such that the non-reversible key is capable of reversible use in an inserted state of the key (K) into a key insertion hole (23).

Abstract: A cylinder lock comprising a cylinder housing (2), a cylinder core (4) having a key channel (5) arranged in the cylinder housing (2), at least one side bar (6, 7) arranged between the cylinder housing (2) and the cylinder core (4) and a plurality of side pins (20) arranged on at least one side of the key channel (5) and arranged to be lifted by insertion of a key (8) and in cooperation with the side bar (6, 7) allow or prevent relative rotation of the cylinder housing (2) and the cylinder core (4), wherein each side pin (20) comprises a foot (26, 29) adapted to be lifted by a code groove (10) in the side surface (12) of the key. The cylinder lock is characterized in that the foot (26) of at least one of the side pins (20) is tapered. A key (8) for the cylinder lock having a groove for side pins having a tapered foot is also described.

Abstract: The present disclosure provides for a lock cylinder having a rotatable spindle with at least one disc and at least one wafer housing rotatingly engaged therewith. A slidable wafer is carried on the wafer housing. A locking bar is operable to prevent rotation of the lock cylinder in a locked position and permit rotation of the lock cylinder in an unlocked position.

Abstract: An exemplary lock assembly includes a plurality of discs, one or more wafer housings housing one or more wafers, a spindle, a locking bar, and a lock assembly housing. Each wafer housing is provided with one or more wafers that are spring biased in a first direction. The discs, wafer housing, and wafers may include recesses. When no key is inserted, the lock assembly is locked by both the wafers and the locking bar. When a proper key is utilized, the locking bar is free to move into the recesses to release the spindle.

Abstract: A lock assembly is provided that includes: a lock cylinder having a bore disposed therein and at least one pocket located adjacent the periphery of the bore; a plug including a cassette slot; a plunger that fits in the plug; a locking tab having a slot disposed therein; the slot of the locking tab receives a portion of the plunger; a cassette having a key slot configured to receive a key; the cassette includes a tool slot configured to receive a tool to selectively engage the plunger to selectively move at least a portion of the locking tab into and out of the pocket; when a portion of the locking tab is located in the pocket the locking tab does not block the cassette from being removed from the plug.

Abstract: Lock assembly and method of coding and recoding locks. Some embodiments of a lock include a housing, a lock cylinder, a plurality of tumblers, a plurality of codebars, and a sidebar. Some embodiments of a lock include a housing, a lock cylinder, a plurality of tumblers, a plurality of code blocks, a sidebar, and a codebar.

Abstract: The invention relates to a locking device of a motor vehicle, having a key (10) and a lock cylinder, wherein the lock cylinder comprises a cylinder core rotatably supported in a cylinder housing of the lock cylinder, a channel comprising the cylinder core and into which the key (10) can be inserted, spring-loaded tumbler elements displaceably supported radial to the cylinder axis of the lock cylinder when inserting the key (10) into the channel radial to the cylinder axis of the lock cylinder, the plurality of outer surfaces (11a, 11b, 12a, 12b) on the key (10) comprising at least two encoding strips (51a, 51b) acting on the tumbler elements when the key (10) is inserted.

Abstract: A cylinder lock assembly including a plug rotatable in a cylinder lock body and including a plurality of chambers, each of the chambers having a chamber depth axis, and a plurality of plug locking elements received in the chambers, each of the plug locking elements including a key cut interface probe for interfacing with a key cut formed on a key, and wherein each of the plug locking elements is arranged to move along the chamber depth axis and not rotate about the chamber depth axis, and each of the key cut interface probes has a predetermined orientation with respect to the chamber depth axis.

Abstract: A lock device having a lock cylinder and a flat key having a control gate. The lock cylinder has a cylinder housing and a cylinder core rotationally supported in the cylinder housing and a plurality of plate-shaped tumblers that are supported in the cylinder core so as to be radially slidable with respect to the rotational axis of the cylinder core and which each have a key opening and are at least partially pushed by the spring load into a locking channel of the cylinder housing in order to lock the lock cylinder when the flat key is removed and which are slid into an unlocking position by the control cam guided in the control gate when the key is inserted. At least one stop is associated with each of the tumblers in order to limit the sliding path to conceal the unlocking position.

Abstract: A locking system is set forth having a key and a lock cylinder. The lock cylinder has a cylinder core journalled in a housing and having a keyway for inserting the key. A plurality of tumblers actuable by the key and an additional blocking element movably arranged in a guide passage of the cylinder core project into the keyway, said additional blocking element being displaceable obliquely or transversely to the direction of insertion of the key. The additional blocking element is made for cooperation with a counter-element arranged at the key blade with a key introduced up to the maximum insertion depth. The counter-element is in this respect arranged in a groove or recess starting from the key tip and extending in the longitudinal direction of the key blade.

Abstract: A rekeyable lock cylinder comprises a cylinder body, a plug assembly disposed within the cylinder body and an operation error preventing unit. The cylinder body has a plurality of upper pin holes and an accommodating hole. The plug assembly comprises a plug body, a plurality of assembled rack components and a position block disposed within the plug body. The plug body has an outside wall, a keyhole, a plurality of lower pin holes and a first hole in communication with the outside wall and the keyhole. The assembled rack components are disposed at each of the lower pin holes of the plug body respectively. The operation error preventing unit comprises a first movable member disposed at the accommodating hole of the cylinder body and a second movable member disposed at the first hole of the plug body, and the first movable member may contact against the second movable member.

Abstract: Anti-theft lockset is disclosed. Lock column and frame body are arranged in lock core. Outer side of lock column is matched with a long slot on the inner wall of lock shell. Inner side of lock column is provided with a crown pillar, and lock core is provided with a sliding chute for causing lock column to slide and a first through hole for causing frame body to move. Crown pillar is contacted with a first lock ball. Lock core is internally provided with lock ball holes matched with first and second lock balls. One end of the second lock ball is contacted with the frame body. The lock core is provided with a containing slot for causing the first lock ball and a locking plate to move up and down. The containing slot is communicated with a key hole. The locking plate is provided with a second through hole.

Abstract: A locking device comprises a key (10) and a locking cylinder (30). The locking cylinder (30) in turn is composed of a stationary cylinder housing (31) and a cylinder core (32) rotatably supported therein. In order to increase the break-in safety, it is proposed to use two types of plate closures (40, 50) in the cylinder core (32), the displacement of that closure pointing into two radial directions (41, 51) that differ from each other. The key (10) comprises planar outer surfaces (12, 13) disposed at an angle to each other, the two types of plate closures (40, 50) being parallel displaceable to said surfaces. Each of the two adjoining outer surfaces (12, 13) has a dedicated linear control path (21, 22), which varies in adjoining key sections transversely to the key longitudinal direction (29) for coding the key (10).

Abstract: A key device including a shaft including a key-cut surface for forming inward key cuts thereon, a key head mounted on the shaft; and a fixed key pin protruding outwards from the key-cut surface.

Abstract: A lock with a programming device, includes a stator, a rotor rotatably inserted therein, a keyhole, a longitudinal groove, a set of key followers and a set of locking pins which, under control of a change bar, can be mutually engaged for normal operation and disengaged in a change condition, and can be moved or blocked under control of a stop bar provided with springs which stress the stop bar outwards. The change bar is arranged to keep or assume, even in the change condition, a position in which it retains the engagement among at least some of the key followers and locking pins. A change element displaces the change bar to the position in which it disengages all the key followers from the locking pins, when the user intends to proceed with the change of the key. A device for preventing a faulty programming is provided.

Abstract: A centralized unlocking operation device is provided in which a first operating arm pivots in response to a rotor being pivoted from a neutral position in a forward direction, and a second operating arm pivots in response to the rotor being pivoted from the neutral position in a reverse direction, wherein a first pressing face (38) that abuts against and imposes a pressing force on a first pressure-receiving part (35) of the first operating arm (33) when the rotor (15) is pivoted from the neutral position to the first operating position side and a second pressing face (39) that abuts against and imposes a pressing force on a second pressure-receiving part (36) of the second operating arm (34) when the rotor (15) is pivoted from the neutral position to the second operating position side are formed on a cam part (37) provided on the rotor (15), and the spring (32) is provided between the first and second operating arms (33, 34) so as to urge the first and second operating arms (33, 34) in a direction in which t

Abstract: A pull-up latch mechanism includes a stator (2) with an inner open channel (20), a cap (10) attached to a cylinder (1) lodged into the open channel (20) of the stator (2), a shaft (8) provided with a latching pawl, and a control system connecting the shaft (8) to the cylinder. The control system is adapted for generating a first movement of rotation of the cylinder, a movement of the shaft (8) away from the cylinder in the direction of the longitudinal axis, for generating a second movement of rotation of the cylinder, and a movement of the shaft towards the cylinder in the direction of a central axis.

Abstract: A rekeyable lock cylinder includes a plug body with a keyway opening along a longitudinal axis and a multiple of channels transverse to the axis. A locking bar generally parallel to the longitudinal axis, the locking bar having an extension. A slide movably mounted to an end section of the plug body, the slide having a slot which selectively permits passage of the extension during a rekeying procedure.

Abstract: The invention relates to a locking device, in particular for a motor vehicle, having a key (10) and a lock cylinder (30), having a cylinder core (32), which is mounted in a rotatable manner in a cylinder housing (31) and has a key channel (33) into which the key (10) can be introduced, having spring-loaded tumbler elements (41, 42), which are mounted such that, when the key (10) is inserted into the key channel (33), they can be displaced radially in relation to the axis (34) of the lock cylinder (30), and having a plurality of outer surfaces (13, 14, 15), which are provided on the key (10), have control tracks (11, 12) and act on the tumbler elements (41, 42) when the key (10) is introduced.

Abstract: The invention relates to a cylinder lock of the type of a disk tumbler cylinder having a cylinder housing and a cylinder core rotatable therein, with a plurality of blockable disk tumblers being provided in the cylinder core which have at least one respective engagement section. The disk tumblers are movable between an unlatched position and a latched position and are biased along a respective direction of bias into the latched position. In the latched position, the respective engagement section engages into an associated cut-out in the cylinder housing to block the cylinder core against a rotary movement relative to the cylinder housing. The cylinder core is rotatable in a rotary opening direction relative to the cylinder housing when the disk tumblers are in the unlatched position.

Abstract: A thin key that is thin but includes serrations on each of two opposite sides of a blade (42, 72). The key is associated with a cylinder lock including a rotor (13) with tumblers (21-28) retained in the rotor. The blade, which is for insertion into the rotor of the cylinder lock, includes opposite first and second wide sides (F1, F3; F2, F4) and opposite first and second narrow sides (51, 74; 52, 75). A first notch (54, 76) is formed in the first wide side and a second notch (64, 86) is formed in the second wide side. The first and second notches each have a serrated wall (54a, 76a; 64a, 86a) engageable with the tumblers. The first notch and the second notch are spaced apart so that they do not overlap each other. The sum of the depths of the first and second notches (L1, D1; L2, D2) is greater than or equal to the thickness of the blade (L3, D3).

Abstract: A programmable cylinder lock includes a stator and a cylindrical rotor mounted therein, having a keyhole and including inside the rotor key followers movable along the longitudinal and transversal directions, and locking pins movable along the longitudinal direction, the followers and locking pins forming together a number of pairs and having toothings for mutually cooperating to define the lock codification, the rotor including a stop bar cooperating with a longitudinal groove of the stator and cooperating with the locking pins, and a change bar slidingly coupled with the followers to keep them engaged with the pins and disengage them therefrom when the bar provides a lock programming position. The bar has projections facing the keyhole, and the use key has corresponding recesses to face the projections when correctly inserted in the lock, whereas the change key has a longitudinal groove extending in a position corresponding to the use key recesses.

Abstract: A programmable cylinder lock includes a stator and a cylindrical rotor, mounted therein for rotation around its own axis, has a keyhole, and comprising inside the rotor key followers movable along the longitudinal and transversal directions, and locking pins movable along the longitudinal direction, the followers and locking pins forming together a number of pairs and having toothings for mutually cooperating to define the lock codification, the rotor including a stop bar cooperating with a longitudinal groove of the stator and cooperating with the pins to immobilize them, and a change bar slidingly coupled with the followers to keep them engaged with the pins and to disengage them therefrom when the bar provides a lock programming position. The followers have a projection which engages a side surface of the key and, at the contact of a normal use key, prevents the transversal displacement of the key and the change bar.

Abstract: A disclosed lock assembly is provided with one or more wafers contained in one or more wafer housings.

Abstract: A kit for a master keying system includes a plurality of replacement master racks. A rack removal key is provided for insertion into a keyway. The rack removal key has a first cut defining a first lift amount. A rack removal tool is provided for insertion into the keyway. The rack removal tool has a second cut defining a second lift amount, wherein the second lift amount is greater than the first lift amount.

Abstract: A master key system and method for a reprogrammable lock cylinder with at least one first master pin and one second master pin. The first and second master pins have different bitting configurations. The master key system includes at least a first array of change key cuts corresponding to an input key bitting array and sequence of progression and at least two master key cuts corresponding to the input key bitting array and sequence of progression and each of the change key cuts. The system further comprises at least one master pin matrix including a master pin sequence for each change key cut and at least one rekey matrix including a rekey cut for each change key. Each master pin sequence represents a sequence of master pins configured to achieve the respective change key cut and the at least two master key cuts.

Abstract: Anti-theft lockset is disclosed. Lock column and frame body are arranged in lock core. Outer side of lock column is matched with a long slot on the inner wall of lock shell. Inner side of lock column is provided with a crown pillar, and lock core is provided with a sliding chute for causing lock column to slide and a first through hole for causing frame body to move. Crown pillar is contacted with a first lock ball. Lock core is internally provided with lock ball holes matched with first and second lock balls. One end of the second lock ball is contacted with the frame body. The lock core is provided with a containing slot for causing the first lock ball and a locking plate to move up and down. The containing slot is communicated with a key hole. The locking plate is provided with a second through hole.

Abstract: A lock core includes a casing having a space defined axially therein and multiple top bead holes defined radially in the casing. The casing has at least one side bead hole and a side bead unit is located in at least one side bead hole. The side bead unit has a side bead and a resilient member mounted to outside of the side bead. The side bead has a neck and a flange. A core is located in the space and has bottom bead holes and a keyhole which communicates with the bottom bead holes which communicate with the top bead holes. Each of the bottom bead holes has a stepped portion formed therein which is located corresponding to the flange of the side bead. The depth of each of the stepped portions is not larger than the total length of the neck and the flange.

Abstract: A programmable cylinder lock includes a stator and a cylindrical rotor, mounted therein for rotation around its own axis and having a keyhole, a number of key followers movable along their own longitudinal and transversal directions, intended to cooperate with a key inserted into the keyhole, a number of locking pins movable along their own longitudinal direction, the key followers and locking pins forming together a number of pairs and having toothings cooperating to define the lock codification, the rotor including a stop bar cooperating with a longitudinal groove of the stator and having projections cooperating with notches of the locking pins to immobilize them when the stop bar engages them, and a change bar slidingly coupled with the key followers to normally keep them engaged with the locking pins and to disengage them therefrom when the change bar provides a lock programming position.

Abstract: A programmable lock cylinder assembly including a lock housing and a cylinder plug including a keyway extending therein. At least one locking member is moveable in the cylinder plug between a locked position wherein the cylinder plug is rotationally locked relative to the housing and an unlocked position wherein the cylinder plug is rotational relative to the housing. A plurality of pin sets are positioned in the cylinder plug. Each pin set includes a keyway pin component and a locking pin component and is positioned such that a portion of each keyway pin component extends across the keyway. The pin components are selectively engagable. A re-combinating member is engaged with one of the components of each pin set and is moveable between a first position wherein the keyway pin components are engaged with the locking pin components and a second position wherein the keyway pin components are disengaged from the locking pin components.

Abstract: The present invention discloses a computer lock including a lock body, a guide seat, a lock tongue seat, a spring, a hook cylinder, and a cable rope set. The hook cylinder has a hook part extending outwards from the front end thereof. The hook part is arranged at inner wall of a slot of a computer; by lock actuation of a key, the guide seat is actuated to guide the lock tongue of the lock tongue seat to outstretch forward and enter the slot along the guide groove on the front end of the hook cylinder. By the foregoing mechanism, the computer lock is of being easy operation and can be locked and unlocked conveniently to prevent the computer from being stolen.

Abstract: A lock device having a lock cylinder and a flat key having a control gate. The lock cylinder has a cylinder housing and a cylinder core rotationally supported in the cylinder housing and a plurality of plate-shaped tumblers that are supported in the cylinder core so as to be radially slidable with respect to the rotational axis of the cylinder core and which each have a key opening and are at least partially pushed by the spring load into a locking channel of the cylinder housing in order to lock the lock cylinder when the flat key is removed and which are slid into an unlocking position by the control cam guided in the control gate when the key is inserted. At least one stop is associated with each of the tumblers in order to limit the sliding path to conceal the unlocking position.

Abstract: A lock device (10) is used with a flat key (K) having asymmetric opposite edges (3, 4). The lock device (10) includes a key rotor (14) which is configured to have distances from a central axis line (O2) of the key (K) to abutment points of the edges (3, 4) against the tumbler (32a-32c) respectively, and the distances are set so as to equal each other such that the non-reversible key is capable of reversible use in an inserted state of the key (K) into a key insertion hole (23).

Abstract: A rekeyable lock cylinder comprises a plurality of first rack components, a plurality of second rack components and a guide bar having a first surface engaged with the first rack components. The second rack components are movable via contacting against a first matched key which is inserted in a first direction. The guide bar has a second surface, a first side, a second side, and a tool-receiving portion recessed into the first side. The tool-receiving portion is parallel to the first direction, and the first rack components are actuated by the guide bar via acting force applied by the rekeying tool accommodated in the tool-receiving portion therefore enabling the first rack components to move in a transverse direction relative to the first direction and disengaging the first rack components from the second rack components.

Abstract: The invention provides a showcase having at least two glass doors, a first door being fastened to a front ferrule and a second door being fastened to a rear ferrule, each of the ferrules moving along a respective rail, said locking device comprising a lock for locking the two doors together, wherein the showcase includes a locking device comprising a slider mounted to move in said front ferrule transversely relative thereto, and having a rotor of the lock installed thereon, wherein said rear ferrule includes an opening that comes into line with said rotor in a position for locking the two doors together, and that is suitable for receiving a bolt mounted at the end of said rotor, and wherein said slider includes a relatively flat face plate coming substantially flush with said ferrule in the locked position of said doors.

Abstract: According to one aspect of the present invention, an arrangement for a lock is provided, comprising: a first lock part and a second lock part which is rotatably arranged in the first lock part and comprises a plurality of lock elements for cooperation with the first lock part and a key, which lock elements comprise a first and a second group of lock elements which are oriented with a primary end facing in a first and a second direction respectively relative to the second lock part, each of which lock elements in the first and second group is arranged: to assume a first position relative to the second lock part in the absence of actuation of the key, to be movable by means of the key from the first position into a third position via a second intermediate position, and to prevent rotation of the second lock part in the first position, each lock element in the first group being arranged to, in the second position, prevent rotation of the second lock part and, in the third position, allow rotation of the second l

Abstract: A recodeable lock includes a housing, a cylinder plug, a plurality of wafer tumblers, and a sidebar coupled with the cylinder plug. The sidebar is assembled with a plurality of code blocks and a codebar releasably securing the code blocks to the sidebar. A liftbar is disposed in the housing radially outward of the cylinder plug and is configured to selectively engage a radially outward extending appendage of the codebar when the cylinder plug and sidebar are rotated to a recoding orientation, to release the code blocks from the sidebar. The housing includes a circumferential track axially positioned to receive the appendage of the codebar to permit greater than 180 degree rotation of the cylinder plug and sidebar with respect to the housing.

Abstract: A cylinder lock assembly including a plug rotatable in a cylinder lock body and including a plurality of chambers, each of the chambers having a chamber depth axis, and a plurality of plug locking elements received in the chambers, each of the plug locking elements including a key cut interface probe for interfacing with a key cut formed on a key, and wherein each of the plug locking elements is arranged to move along the chamber depth axis and not rotate about the chamber depth axis, and each of the key cut interface probes has a predetermined orientation with respect to the chamber depth axis.

Abstract: A rekeyable masterkeyabe lock includes a plurality of key followers, a plurality of user racks and a plurality of master racks. One user rack and one master rack are associated with each key follower and are configured to be selectively disengaged from, and reengaged with, the key follower. When the user racks are disenggaged from the key follower, the valid user key can be replaced with a new user key. Reengaging the user racks with the key followers rekeys the lock cylinder to the new user key and invalidates the original user key. Similar functionality applies to rekeying the master key. Either the user key or the master key can be rekeyed without rekeying the other.

Abstract: A rekeyable lock cylinder assembly includes at least one lock cylinder and a mortise lock adapter. Each lock cylinder includes a cylinder body with a longitudinal axis. A locking bar is disposed in the cylinder body for movement transverse to, and rotationally about, the longitudinal axis. A plug assembly having a tool receiving aperture is disposed in the cylinder body and is rotatable about the longitudinal axis. A plurality of pins and a corresponding plurality of racks are disposed in the plug assembly. A first member is moveable in response to application of a force by a tool received through the aperture to simultaneously disengage all of the plurality of racks from the plurality of pins. The mortise lock adapter includes a housing configured for receiving the cylinder body of the lock cylinder. A mortise lock actuator is coupled to the plug assembly of the lock cylinder.

Abstract: A lock with a programming device, includes a stator (1) a rotor (2), mounted inside the stator, a keyhole for a key (3), a longitudinal groove of stator, a series of key followers (4) and a series of locking pins (6) which, under control of a change bar (11), can be mutually engaged for normal operation or disengaged in a change position, and which can be made movable or blocked under control of a stop bar (9) provided with springs which stress the same outwards. There are provided two separate grooves, a change groove (12) and a stop groove (14) machined in rotor (2), and the grooves, the stop bar (9) and change bar (11) have such conformations that are positively prevented the cooperation of the stop bar (9) with the change groove (12) and the cooperation of the change bar (11) with the stop groove (14).

Abstract: A re-keyable cylinder lock has a control member to permit or restrict transverse movement of a re-keying unit. The control member is movable axially between first and second positions and transversely to a third position from the second position. In the third position, the re-keying unit moves transversely and disengages from first tumbler pieces. A limit member is provided to prevent the control member from moving axially when no right key is inserted into a plug. A security arm is connected to the control member and is breakable so that destructive forces cannot reach the control member.

Abstract: A rekeyable lock cylinder includes a lock cylinder body having an interior void and a plug assembly rotatably disposed in the lock cylinder body. The plug assembly includes a plug body having a keyway. A plurality of racks is movably disposed relative to the plug body. A plurality of key followers is positioned across the keyway and is moveably disposed relative to the plug body. Each key follower is configured to engage a respective rack of the plurality of racks. A key follower rotation member is drivably engaged with each key follower of the plurality of key followers. The key follower rotation member is selectively movable to rotate each key follower of the plurality of key followers to thereby disengage each key follower of the plurality of key followers from the respective rack of the plurality of racks to facilitate a keying of the rekeyable lock cylinder.

Abstract: A master key lock includes a lock cylinder having a keyway for receiving a key, a sleeve about the cylinder, a plurality of wafer tumblers, a master key and a spring operable to axially move the sleeve relative to the cylinder when the master key is inserted into the keyway. A system that uses the master key lock includes a lock case wherein the sleeve is disposed between the cylinder and the lock case, the sleeve being axially movable within the case. The sleeve comprises a plurality of transversely disposed slots for engaging the plurality of wafer tumblers such that the lock is unlocked by insertion of a key or a master key. A method of using the master key lock is also disclosed.

Abstract: A cylinder lock is disclosed. The cylinder lock can be used on a motor vehicle door lock. The disclosed cylinder lock has plate tumblers and also a key for the cylinder lock. The key for the cylinder lock could be a reversible key.