Abstract: A lock assembly has a housing, a lock cylinder, an adjusting block and an adjusting assembly. The adjusting block is slidably on the lock cylinder and has a wedge side facing the lock cylinder and a plurality of first wedge elements formed on the wedge side. The adjusting assembly is mounted in the lock cylinder and has multiple adjustable rack assemblies mounted in the lock cylinder. Each rack assembly has a rack element and an adjusting base. The rack element selectively abuts with a corresponding one of the lock pins and has a second wedge element selectively engaging one of the first wedge elements on the adjusting block. The adjusting base selectively engages the rack element.

Abstract: A lock assembly has a housing, a lock cylinder, an adjusting block and multiple rack assemblies. The adjusting block is slidably received in the lock cylinder and has a wedge side facing the lock cylinder and a plurality of first wedge elements formed on the wedge side. The rack assemblies are slidably received respectively in the lock cylinder. Each rack assembly has a rack element, an adjusting base and a resilient member arranged between the rack element and the adjusting base. Each rack element and each adjusting base have a plurality teeth formed thereon and detachably engaged each other respectively. Each rack element has a second wedge element that is selectively engaged or disengaged from one of the first wedge elements on the adjusting block.

Abstract: A cylinder lock includes a lock housing receiving a plug assembly that has a key hole, tumbler pieces having respective toothed parts, and a re-keying unit. The re-keying unit has rotatable gear wheels engaged releasably with the respective toothed parts to reposition the respective tumbler pieces. The gear wheels disengage from the respective tooth parts by moving transversely of a longitudinal axis of the lock housing. Re-keying methods are also disclosed.

Abstract: A rekeyable 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 is disposed in the cylinder body and is rotateable between a first position and a second position. The plug assembly has a lock face with a tool receiving aperture. A plurality of pins and a corresponding plurality of racks are disposed in the plug assembly. The plurality of racks is selectively engageable with the plurality of pins. A first member coupled to the plurality of racks is moveable in response to application of a force against the first member by a tool received through the tool receiving aperture. The first member is configured to simultaneously disengage all of the plurality of racks from the plurality of pins in response to the movement of the first member.

Abstract: A reprogrammable lock comprises a rotor (2) mounted rotatably inside a stator (1). In the rotor (2) are mounted key reading plates (3) to read the coding profile (8b, 9b) of a user/programming key (8, 9), locking plates (4) that can couple with the key reading plates (3) and are adapted to block rotation of the rotor (2) with respect to the stator (1), two lateral inserts (6) integral with the locking plates (4) and provided with an arched surface (6b) adapted to slide on the inner surface of the stator (1), and a rotation stopping plate (10) free from the locking plates (4) to block rotation of the rotor (2) with respect to the stator (1).

Abstract: A high security key blade and key for use with a lock having a cylindrical shell, a key plug which is rotatably mounted in the shell, a longitudinal key slop in the key plug, and at least one locking tumbler assembly cooperating with the key being inserted into the lock. The locking tumbler assembly includes a pair of independently movable tumbler segments which are positionable in different elevational positions in a common cavity.

Abstract: The invention relates to a rotary cylinder lock (1) which is designed to be actuated with a multi-groove key. The inventive lock comprises: a rotor (10) which is mounted such that it can rotate inside a stator (20) and at least one spring which is mounted such that it can move inside a guide housing (41, 42, 43, 44, 45, 46) between a locked position and an unlocked position each spring being coupled to an elastic return means which moves same into the locked position. The invention is characterised in that each guide housing (41, 42, 43, 44, 45, 46) can receive two different types of springs which can co-operate respectively with each of the two key grooves which extend such as to oppose the drive force exerted by the associated elastic return means when the key is inserted into the rotor.

Abstract: A lock core structure including a housing, a lock core, at least two latch elements and plural lock piece sets. Each lock piece set includes a division plate and a first lock piece and the second lock piece are embedded in two sliding tracks on the division plate, and an elastic element is mounted between the first lock piece and the second lock piece for interlocking the first and the second lock pieces. Through the interlocked structure between the first lock piece and the second lock piece, it will be harder for the thief to break the lock core.

Abstract: A lock barrel and a driving part for the same comprises a plurality of key channels for the insertion o the driving part (key) and a plurality of transverse gateways for housing movable parts, which will bulge into the key channels for making the channels effectively small and therefore shielding them from illegally intruded tools.

Abstract: A keying system includes a cylinder body. A plug assembly disposed in the cylinder body includes a plug body and a carrier sub-assembly disposed adjacent the plug body. The carrier sub-assembly is moveable parallel to a longitudinal axis of the cylinder body between a first position and a second position. The plug assembly includes a plurality of pins and a plurality of racks for selectively engaging the plurality of pins. Each rack of the plurality of racks has a first locking bar-receiving groove along a neutral axis and at least a second locking bar-receiving groove spaced from the neutral axis, wherein a spacing of the second locking bar-receiving groove from the neutral axis of a first rack of the plurality of racks is different from a spacing of the second locking bar-receiving groove from the neutral axis of at least one other of the plurality of racks.

Abstract: A lock has a shell, an internal sleeve and a locking rod assembly. The shell has multiple protrusions formed inside the shell. The internal sleeve is mounted rotatably in the shell. The locking rod assembly is mounted in the internal sleeve and has multiple locking rods. Each locking rod has a cut selectively aligning with the protrusions in the shell. When the cuts of the locking rods align with the protrusions in the shell, the internal sleeve can be rotated relative to the shell to change the lock or unlock status of the lock.

Abstract: Certain exemplary embodiments of the present invention provide a lock keying system comprising: a lock cylinder comprising: a cylinder body; a plug assembly disposed in the cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating the plurality of pins; and a rack alignment tool receiving aperture defined by the lock cylinder; and a rack alignment tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from the plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of the plurality of racks, each prong from the plurality of prongs dimensioned lengthwise to relocate to a first predetermined position the corresponding one of the plurality of racks, the first predetermined position common to each of the plurality of racks, each prong from the plurality of prongs comprising a second longitudinal end connected to the base plate, wherein the rack alignment tool is adapted to restrain a carrie

Abstract: A locking device, which mounts a user key (the first key) and a manager key (the second key) separatedly, places a first lock and a second lock unitedly in an outer cylinder. The first lock is opened or rotated by the first key. After the first lock is open, the first key cannot be pulled out of the locking device. If the second lock is open by the second key, the first key can be pulled out together with the second key.

Abstract: Master-keyed pin tumbler lock and relative master-key, where each pin has an inner window with an outer protuberance, which a spring acts upon and an inner projection, which the key acts upon, giving rise to the movement of the pin. The inner projections are at different heights and the pins are placed so that some move in one direction and others in the opposite direction, each pin having, in its inner window, a step placed on the opposite side to that of the inner projection. On one of the sides of the key there is a notch whose minimum width is the distance between the maximum level reached by the projections of the pins that move in one direction and the maximum level reached by those of the pins that move in the opposite direction; on the opposite side they have a double serration combined with the steps of the inner windows of the pins.

Abstract: A dual action lock for keys has a core and a housing. The core has a key hole and pins. The key holes is formed in the core and allows the key to be inserted into the core. The pins are slidably mounted inside of the core. The housing has a through hole. The through hole is formed through the housing and holds the core inside. When different keys are inserted into the core, the expansions of the pins out of the core will be changed to make the core to be selectively turned clockwise, counter-clockwise or both direction. Accordingly, the lock can have an ability of performing multiple functions as at least two or more locks.

Abstract: A rekeyable lock cylinder includes a cylinder body with a plug body and carrier sub-assembly disposed therein. The plug body includes a plurality of spring-loaded pins and the carrier assembly includes a plurality of racks for engaging the pins to operate the lock cylinder. The racks and pins move in a transverse direction, in response to insertion of a first valid key into the lock cylinder, to unlock the lock cylinder. The carrier moves in a longitudinal direction, in response to insertion of a tool in a tool-receiving aperture, from an operating position to a rekeying position. In the rekeying position, the racks are disengaged from the pins and a second valid key can replace the first valid key. Rotation of the plug body from the rekeying position with the second valid key in the lock cylinder obsoletes the first valid key.

Abstract: The invention provides a pick-resistant locking mechanism with wafer tumblers, sidebars and an interchangeable cylinder that allows re-keying of the lock. The sidebars have projections with beveled sides that engage with cavities in the lock shell when rotational torque is applied to the lock in the absence of the correct key. A sidebar of the lock contacts two, nonadjacent wafer tumblers. The wafer tumblers have indentations that engage cavities in the lock shell when rotational torque is applied during picking of the lock. Tolerance between sidebars and the lock shell is less than the tolerance between tumblers and the lock shell. The tumbler springs are not accessible from the keyway of the lock and are more powerful than the sidebar springs.

Abstract: A rekeyable lock cylinder includes a cylinder body with a plug body and carrier sub-assembly disposed therein. The plug body includes a plurality of spring-loaded pins and the carrier assembly includes a plurality of racks for engaging the pins to operate the lock cylinder. The racks and pins move in a transverse direction, in response to insertion of a first valid key into the lock cylinder, to unlock the lock cylinder. The carrier moves in a longitudinal direction, in response to insertion of a tool in a tool-receiving aperture, from an operating position to a rekeying position. In the rekeying position, the racks are disengaged from the pins and a second valid key can replace the first valid key. Rotation of the plug body from the rekeying position with the second valid key in the lock cylinder obsoletes the first valid key.

Abstract: A lock plug comprising a top end having a key way etched out of a solid wall, the key way leading to an interior of the lock plug housing a locking mechanism; and, a break away wall bordering a cavity carved out from the solid wall on a side of the key way, the break away wall forming a side of the key way. The locking mechanism in a lock plug usually employs the wafer technology and in this case, the interior of the lock plug includes a wafer cavity having wafers designed according to a particular key code.

Abstract: A cylinder lock, especially for motor vehicles, comprising a housing (1) in the inner cylindrical cavity of which there is arranged a cylinder core (2) that is equipped with a key channel (22) and spring-loaded tumblers (20, 20?), wherein, when no appropriate key is fully inserted into the key channel (22), blocking projections (201) of the tumblers (20, 20?) protrude into a blocking groove (13, 13?) formed in a member in which the cylindrical core (2) is supported for turning and, when the appropriate key is fully inserted, the blocking projections (201) of the tumblers (20, 20?) do not extend beyond the periphery of the cylindrical core, wherein the cylinder lock is further provided with means for coupling the cylindrical core (2) with an output member (3) of the cylinder lock when the cylindrical core is being turned by the appropriate key, and for uncoupling of the cylindrical core (2) from the output member (3) of the cylinder lock when the cylinder core is turned by means of a false key or forcibly, the

Abstract: Certain exemplary embodiments of the present invention provide a lock keying system comprising: a lock cylinder comprising: a cylinder body; a plug assembly disposed in the cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating the plurality of pins; and a rack alignment tool receiving aperture defined by the lock cylinder; and a rack alignment tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from the plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of the plurality of racks, each prong from the plurality of prongs dimensioned lengthwise to relocate to a first predetermined position the corresponding one of the plurality of racks, the first predetermined position common to each of the plurality of racks, each prong from the plurality of prongs comprising a second longitudinal end connected to the base plate, wherein the rack alignment tool is adapted to restrain a carrie

Abstract: A keying system, method and kit, wherein a plurality of replacement master racks are installed in a movable carrier assembly of a cylinder lock with the aid of a rack removal key and a rack removal tool configured for insertion into a keyway. The rack removal key has a first cut defining a first lift amount, and the rack removal tool has a second cut defining a second lift amount, the second lift amount being greater than the first lift amount.

Abstract: A pin tumbler lock is provided with one or more additional chambers for housing a secondary locking member for engagement with a portion of a key. The invention also provides a lock system comprising a plurality of locks, each lock including two chambers. The lock system has a potential of N chamber positions to provide a substantial increase in the number of effective unique pin tumbler combinations that can be produced on the same key section or profile by allowing the same pin tumbler combination to be repeated with different locations of these additional chambers.

Abstract: A re-keyable lockset that employs pairs of first and second pins. Coupling of the first and second pins to one another defines a key profile for a mating key. A second key with a different key profile may be installed to the lockset when the first and second pins are uncoupled from one another. Thereafter, the first and second pins may be re-coupled to one another to define the key profile of a new mating key. A method for re-keying a lockset is also provided.

Abstract: A re-keyable lock and method. The lock has locked and unlocked positions and includes a housing and a cylinder rotatably supported in the housing. The lock includes a plurality of wafer tumblers resiliently supported in corresponding channels formed in the cylinder. Each wafer tumbler includes a rider element selectively engaged with a base element in first and second engagement positions, wherein the first engagement position corresponds to a first key and the second engagement position corresponds to a second key. The lock also includes a re-keying mechanism such as a re-keying tool which is inserted in a re-keying slot when the lock is in the unlocked position to disengage the rider element from the corresponding base element in the first engagement position and to re-engage the rider element to the base element in the second engagement position.

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 connection lock capable of executing locking operation without keys includes a case to house an actuation mechanism, a rotary cylinder and an elastic element. The actuation mechanism includes a movable leg and a fixed leg. The movable leg is moved by the elastic element to be close to the fixed leg at an unlocking position in normal conditions. The rotary cylinder has a nudging member extended from the front end that can move the movable leg away from the fixed leg at a locking position. The case has a one-way hump corresponding to the rotary cylinder to allow the rotary cylinder to be turned in one way to switch the movable leg from the unlocking position close to the fixed leg and to the extended and locking position.

Abstract: A re-keyable lock cylinder includes a plug body and a carrier sub-assembly disposed adjacent the plug body. The plug assembly includes a plurality of planar wafers and the carrier sub assembly includes a plurality of racks for engaging the wafers in a face-to-face teeth arrangement. The racks disengage from the wafers to separate the teeth in response to movement of the carrier such that the lock cylinder is in a re-keyable condition when the racks are disengaged from the wafers.

Abstract: Certain exemplary embodiments of the present invention provide a rekeying system comprising: a rekeyable lock cylinder comprising: a cylinder body; a plug assembly disposed in the cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating the plurality of pins; and a rekeying tool receiving aperture defined by the rekeyable lock cylinder; and a rekeying tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from the plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of the plurality of racks, each prong from the plurality of prongs dimensioned lengthwise to relocate to a first predetermined position the corresponding one of the plurality of racks, the first predetermined position common to each of the plurality of racks, each prong from the plurality of prongs comprising a second longitudinal end connected to the base plate.

Abstract: A three-action lock barrel having collective locking pins and two-way locking up mechanism is comprised of a case, a limiter, multiple locking plates and a rotor; the case being related to a hollow cylinder; a trough axially extending each from the inner wall of the case; the limiter being provided to limit the longitudinal sliding movement of those multiple locking plates arranged in flush and abutted to one another and accommodated inside the limiter; each locking plate being provided with an upper or a lower locking pin selected at random; the rotor receiving insertion of a key; the key turns around to push those locking pins to clear away or insert into a groove.

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: Certain exemplary embodiments of the present invention provide a lock keying system comprising: a lock cylinder comprising: a cylinder body; a plug assembly disposed in the cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating the plurality of pins; and a rack alignment tool receiving aperture defined by the lock cylinder; and a rack alignment tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from the plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of the plurality of racks, each prong from the plurality of prongs dimensioned lengthwise to relocate to a first predetermined position the corresponding one of the plurality of racks, the first predetermined position common to each of the plurality of racks, each prong from the plurality of prongs comprising a second longitudinal end connected to the base plate, wherein the rack alignment tool is adapted to restrain a carrie

Abstract: A rekeyable lock cylinder includes a cylinder body with a plug body and carrier sub-assembly disposed therein. The plug body includes a plurality of spring-loaded pins and the carrier assembly includes a plurality of racks for engaging the pins to operate the lock cylinder. The racks and pins move in a transverse direction, in response to insertion of a first valid key into the lock cylinder, to unlock the lock cylinder. The carrier moves in a longitudinal direction, in response to insertion of a tool in a tool-receiving aperture, from an operating position to a rekeying position. In the rekeying position, the racks are disengaged from the pins and a second valid key can replace the first valid key. Rotation of the plug body from the rekeying position with the second valid key in the lock cylinder obsoletes the first valid key.

Abstract: A key operated latch includes a housing which supports a lock plug, a motion control sleeve, and a sleeve-like cam therein. The cam rotates with the lock plug, while the motion control sleeve is stationary. The cam has at least one cam slot, and the motion control sleeve has at least one motion control slot. A shaft extends outward from the housing and has at least one projection which is engaged with both the cam slot and the motion control slot. The cam slot and the motion control slot are configured such that rotation of the lock plug imparts a sequence of rotational and axial movements to the shaft. A latching member attached to the shaft, moves between a latched position and an unlatched position in a sequence of axial and rotational motions in order to selectively secure a door, panel, or the like in the closed position.

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 cylinder lock, especially for motor vehicles, comprising a housing (1) in the inner cylindrical cavity of which there is arranged a cylinder core (2) that is equipped with a key channel (22) and spring-loaded tumblers (20, 20′), wherein, when no appropriate key is fully inserted into the key channel (22), blocking projections (201) of the tumblers (20, 20′) protrude into a blocking groove (13, 13′) formed in a member in which the cylindrical core (2) is supported for turning and, when the appropriate key is fully inserted, the blocking projections (201) of the tumblers (20, 20′) do not extend beyond the periphery of the cylindrical core, wherein the cylinder lock is further provided with means for coupling the cylindrical core (2) with an output member (3) of the cylinder lock when the cylindrical core is being turned by the appropriate key, and for uncoupling of the cylindrical core (2) from the output member (3) of the cylinder lock when the cylinder core is turned by means of a fa

Abstract: The lock according to some embodiments of the present invention has a housing, a cylinder disposed within the housing, and a tumbler received within the cylinder. The tumbler can be movable between a first position in which the tumbler directly or indirectly engages the housing to restrict rotation of the cylinder with respect to the housing, and a second position in which the cylinder is rotatable with respect to the housing. In some embodiments, the tumbler can be biased toward the first position. A key can be inserted into the cylinder to actuate the tumbler from the first position to the second position. Once the tumblers are disengaged from the housing, the cylinder can rotate with respect to the housing. The tumblers are made from aluminum to reduce corrosion between the tumblers and the zinc cylinder.

Abstract: An adaptable lock 10 assembly and a method of using the lock 10 assembly in order to reprogram a lock 10 to accept a key different from the key which originally operated the lock 10. The lock 10 assembly includes a housing 12 with a bore 14 disposed through the housing 12 and a plug 16 rotatably mounted in the bore 14. The plug 16 includes at least one radial slot 18 which is disposed in the plug 16 along the circumference of the plug 16. The plug 16 further includes a longitudinal slot used as a keyway 22 which is adapted to receive a key. The assembly further includes first and second radial tumblers 30, 32 which are disposed in the radial slot 18 and are capable of being in an engaged or disengaged relationship. The distal ends of the first and second radial tumblers 30, 32 extend into the keyway 22 to provide a pattern of ridges along the longitudinal inner walls of the keyway 22. When the first and second radial tumblers 30, 32 are engaged in a first position, a first key 24 fits the lock 10.

Abstract: A device for actuating a lock on a door or hinged lid, particularly for a vehicle, includes a momentary contact switch and a lock cylinder having tumblers which are transferred between a blocked position and an unblocked position by a key. In the locked position, the tumblers interact with a locking edge which is released only in the unblocked position. The travelling motion of the momentary contact switch is transferred to an entry element of the lock only in the unblocked position. The lock cylinder is arranged in a manner that prevents it from twisting, and the blocking edge is configured to move transversely in relation to the tumblers. This transverse motion is caused by the traveling motion of the momentary contact switch. The blocked position of the tumblers prevents the transverse movement of the blocking edge. The traveling motion of the momentary contact switch is then only transferred to the lock when the transverse motion of the blocking edge is possible.

Abstract: In a side bar cylinder lock with a variable key code, plug (6) engages within casing (1) at two opposite portions in preventing plug (6) from rotating in locking state. This improves the lock in resistance to attack. Plug (6) has holes (8) each receiving a tumbler plate (11) and variable tumbler (14) side by side therein. When plug (6) is rotated to have a bulged portion (21) of said bar holder (19) abut against concave portion (2) of casing (1), spring (25) forces end portion (26) of plate (11) to enter receiving hole (9) of plug (6), and forces a bulged portion (21) of holder (19) to engage with concave portion (2) of casing (1), whereby engaging portion (13) of plate (11) is disengaged from an engaged portion (15) of variable tumbler (14). After such disengagement, variable tumbler (14) is rotated through an angle to change the key code to a new one.

Abstract: In a cylinder lock with a variable key, plug (6) engages with casing (1) at two portions in preventing plug (6) from rotating in locking state. This improves the lock in resistance to attack. Plug (6) has holes (8) each receiving a tumbler plate (11) and variable tumbler (14) side by side therein. When plug (6) is rotated to have a bulged portion (21) of side bar holder (19) abut against concave portion (2) of casing (1), spring (25) forces end portion (26) of plate (11) to enter receiving hole (9) of plug (6), and forces a bulged portion (21) of holder (19) to engage with concave portion (2) of casing (1), whereby engaging portion (13) of plate (11) is disengaged from an engaged portion (15) of variable tumbler (14). After such disengagement, variable tumbler (14) is rotated through an angle to change the key code to a new one.

Abstract: A key operated latch includes a housing which supports a lock plug, a motion control sleeve, and a sleeve-like cam therein. The cam rotates with the lock plug, while the motion control sleeve is stationary. The cam has at least one cam slot, and the motion control sleeve has at least one motion control slot. A shaft extends outward from the housing and has at least one projection which is engaged with both the cam slot and the motion control slot. The cam slot and the motion control slot are configured such that rotation of the lock plug imparts a sequence of rotational and axial movements to the shaft. A latching member attached to the shaft, moves between a latched position and an unlatched position in a sequence of axial and rotational motions in order to selectively secure a door, panel, or the like in the closed position.

Abstract: A lock core rotatable in a housing is formed with an axially extending key passage, transverse guide slots, and an axially inwardly open bore. A bolt displaceable in the bore between a locked position and a unlocked position has radially open grooves aligned with the slots in the locked position. The inner bolt end can directly engage in an inwardly open seat formed in the housing or with a ball engageable in such a seat to lock the core in the housing. Tumbler plates in the slots are formed with control edges and holes alignable with the bore in a freeing position. The plates are displaceable into blocking positions with the holes offset at least partially from the bore and engaging in the respective grooves. A key has a plurality of respective bit notches engageable with the control edges on engagement of the key in the passage.

Abstract: A lock includes a hollow casing, a core rotatably received in the hollow casing, a key detachably inserted into the core and having a pattern on both sides of the key, locking plates movably received in the slits and at least one of the locking plates being extending out of a corresponding slit and into at least one elongated hole to interfere rotation of the core and a positioning plate received in the hollow casing and being movable with respect to the core. Movement of the positioning plate abuts the locking plates to secure movement of the locking plates, such that only the locking plates are retracted into the core by the pattern of the key to avoid interference with the rotation of the core, whereby the core is immovable.

Abstract: The invention provides a cylinder lock which allows the 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 improving the efficiency of the automotive assembly work.

Abstract: An ignition lock system for a motor vehicle includes an electronic ignition key and an electronic ignition lock having a key receptacle. The electronic ignition key can be inserted into the key receptacle to exchange coded operating signals, the key receptacle, together with the inserted electronic ignition key, being movable out of an initial position into at least one operating position. A mechanical blocking device is provided in the key receptacle, which blocks the electronic ignition key against withdrawal from the key receptacle in the operating position. The mechanical blocking device cooperates with the electronic ignition key in such a way that the electronic ignition key and/or the key receptacle is irreversibly damaged when blocking actions of the mechanical blocking device are forcibly overcome.

Abstract: A lock core rotatable in a housing is formed with an axially extending key passage, transverse guide slots, and an axially inwardly open bore. A bolt displaceable in the bore between a locked position and a unlocked position has radially open grooves aligned with the slots in the locked position. The inner bolt end can directly engage in an inwardly open seat formed in the housing or with a ball engageable in such a seat to lock the core in the housing. Tumbler plates in the slots are formed with control edges and holes alignable with the bore in a freeing position. The plate are displaceable into blocking positions with the holes offset at least partially from the bore and engaging in the respective grooves. A key has a plurality of respective bit notches engageable with the control edges on engagement of the key in the passage.

Abstract: A sidebar for use for automotive locks and all sidebar locks includes an interruption in an edge along the surface to interrupt the inclined plane that is formed when the sidebar becomes canted relative to the longitudinal axis of the lock barrel as the result of the insertion of an incorrectly coded key, in particular a cousin key, into the lock barrel. In one embodiment, the interruption is provided by a gap at or near the longitudinal midpoint of the sidebar. The gap is of sufficient size to accommodate the sidebar biasing spring. In another embodiment, the interruption is provided by indenting the sides of the sidebar at the longitudinal midpoint of the sidebar. In a further embodiment, the sidebar groove in the sleeve is widened at a location corresponding to the longitudinal midpoint of the sidebar.

Abstract: A lever lock unit includes a housing, a dogging element adapted to actuate a lock bolt, a plurality of lever tumblers that are actuable via the dogging element and movable relative thereto, and a blocking element for blocking movement of the dogging element in the absence of a key or when the wrong key is inserted in the unit. The unit is characterized by a cradle accommodated in the dogging element and adapted to receive the lever tumblers. The dogging element is rotatable and is adapted so that when rotated, the cradle accommodated in the dogging element, and there with also the lever tumblers accomodated in the cradle, will be caused to move linearly in relation to the dogging element and in relation to a key inserted into the unit, for movement of the lever tumblers to a blocking element release position when the correct key is inserted.

Abstract: A lock for locking closed a housing for an alarm pull station includes a lock cam and a lock cylinder assembly. The lock cylinder assembly includes: a lock actuation cylinder having a keyhole exposed on a front side of the housing and a key actuation socket in registry with the keyhole, and a tumbler plate movable transversely through the lock actuation cylinder and interposed between the keyhole and the socket. The tumbler plate includes a bore which is out of registry with the keyhole and movable into registry with the keyhole by a key pushed into the keyhole. The lock actuation cylinder is rotatable by an Allen wrench key fit into the socket. The lock actuation cylinder is surrounded by a lock body which is fixed to the housing. The tumbler plate is biased to be engaged into a slot in the lock body and is moveable transversely by the key to disengage the lock body. The lock actuation cylinder rotates the lock cam for locking the base plate to the cover.