Abstract: A locking device for controlled, reversible security using a control key to set the lock's accessibility to multiple individual keys, thus providing complete control of security. The control key has hierarchy over the individual key(s). Rotating the control key from the first to a second position prevents the core from being actuated by the individual key(s), thus activating a blocking function by which the lock can only be operated by the control key. Returning the control key from the second position back to the first position allows the control key to be removed ( the blocking function is still active). When the control key is rotated from the first to a third position, the core can be operated by the individual key(s), thus inactivating the blocking function. Returning the control key from the third position to the first position allows removal of the control key (blocking function remains inactive).

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: 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 lock cylinder (1) with a suitable key (2) is described, the lock cylinder (1) comprising a cylinder core (13) rotatably mounted in the cylinder housing (1′) and having a key channel (12) for entry of the key (2), which key (2) has a height-profiled rib (15) topping its broad side, of which the tumbler wards (29) cooperate with the tips of tumbler pins (18a) arranged in a row and consisting of non-rotatable core pins and housing pins in such a way that the tumbler pins (18a) guided in the core/housing apertures crossing the rotary joint (F) between cylinder core (13) and cylinder housing (1′) are aligned in terms of height such that the parting line (T) between core and housing pins (19, 20) aligns with the rotary joint (F). The rib (15) comprises a plurality of control tracks extending side by side in the key insertion direction, which as a consequence of an adapted tumbler pin tip configuration are selectively scanned by individual tumbler pins (18a).

Abstract: A cylinder lock-key combination including a cylinder housing, a key and a plug which has a circular-cylindrical barrel surface and which is rotatable in an opening in the housing. The barrel surface of the housing includes a key recess whose width exceeds its depth, and a plurality of code pin channels are preferably disposed in several rows. Code pin tumblers present in the code pin channels co-act with one or more blocking elements, such as pins or side bars, disposed in channels intended to this end. The blocking elements block rotation of the plug when one side surface of an inserted key presents wrong code surfaces. There is provided in this way a compact lock construction, which also enables the use of many code pins.

Abstract: A multi-stage burglar-proof lock core comprises a lock head, a multi-stage lock core installed in the lock head, and a plurality of elastomers inserted into the multi-stage lock core. Two parallel inserting holes are radially formed in the lock head with an angle of 45 degrees to the slots in the lock core. The lock core is formed with at least two core units. Each core unit has a through hole along the axial center of the lock hole. Each core unit has a penetrating hole aligned to a respective slot. Each penetrating hole is communicable to the through hole. The lower pin can enter into the penetrating hole of the lock core; while the elastomers are embedded into the slots and the inserting holes. When rotating a selected one of the core units through 45 degrees, the t through hough holes of all core units are aligned to be as a continuous keyhole.

Abstract: A changeable lock assembly suitable for re-keying a lock without disassembly of the lock. The assembly includes a housing having a bore therein, and a plug rotatably mounted in the bore. The plug includes a longitudinal axis and a keyway. The keyway is adapted to receive at least a first user key and a second user key. The lock further includes a change member movable within the lock between a first position to a second position. The change member can move solely in response to operation of the second key. Thus, when the change member is in the first position, the first key operates the lock, and when the change member is in the second position, the first key does not operate the lock. The lock assembly can also employ a change tool that, when inserted into a change slot, can move a change ball from the second position back to the first position.

Abstract: A lock assembly incorporating a number of features designed to defeat attempts to pick or destroy the lock. The lock cylinder assembly employs multiple arrays of pass key pins, making picking of the lock much more difficult. Second, the arrangement of the pass key pins in separate arrays requires that multiple cuts would have to be made into the lock housing mogul or cylinder blank in order to defeat the lock cylinder assembly. Third, the lock cylinder assembly of the present invention may incorporate multiple sets of hardened dowel pins to prevent drilling through the lock housing mogul in the area of the driver pins. Fourth, the lock cylinder assembly of the present invention may incorporate a hardened cylinder shield behind the front face of the cylinder blank to prevent drilling through the cylinder blank.

Abstract: A cylinder lock-key combination includes a cylinder housing (10), a key (30) and a plug (20) which has a circular-cylindrical barrel surface and which is rotatable in an opening (12) in the housing. The barrel surface of the housing includes a key recess (21) whose width exceeds its depth, and a plurality of code pint channels (22). These channels are preferably disposed in several rows. Code pin tumblers present in the code pin channels co-act with one or more blocking elements, such as pins or side bars, disposed in channels (32) intended to this end. The blocking elements block rotation of the plug when one side surface of an inserted key presents wrong code surfaces. There is provided in this way a compact lock construction, which also enables the use of many code pins.

Abstract: Certain exemplary embodiments of the present invention provide 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 position aligning said second plurality of pin chambers with said slot, said second plurality of pins removable from said second plurality of pin chambers when said plug

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 said cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating said plurality of pins; and a rack alignment tool receiving aperture defined by said lock cylinder; and a rack alignment tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from said plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of said plurality of racks, each prong from said plurality of prongs dimensioned lengthwise to relocate to a first predetermined position said corresponding one of said plurality of racks, said first predetermined position common to each of said plurality of racks, each prong from said plurality of prongs comprising a second longitudinal end connected to said base plate, wherein said rack alignment tool is adapted to rest

Abstract: A lock assembly includes a lock cylinder, for actuating a latch assembly, including a lock sleeve, first and second lock rotors, having first and second keyways respectively, rototably fitted in the lock sleeve, and a plurality of tumblers for locking up the first and second lock rotors. A key includes a key head having predetermined locking serrations arranged in such a manner that when the key head is inserted into the first keyway, the locking serrations are adapted to unlock the first lock rotor and enable the first lock rotor freely rotating until the first keyway is aligned with the second keyway, simultaneously, the key head being adapted to insert into the second keyway such that the locking serrations are adapted to unlock the second lock rotor to enable the second lock rotor to freely rotate to control the locking and unlocking of the latch assembly.

Abstract: A lock assembly incorporating a number of features designed to defeat attempts to pick or destroy the lock. The lock cylinder assembly employs multiple arrays of pass key pins, making picking of the lock much more difficult. Second, the arrangement of the pass key pins in separate arrays requires that multiple cuts would have to be made into the lock housing mogul or cylinder blank in order to defeat the lock cylinder assembly. Third, the lock cylinder assembly of the present invention may incorporate multiple sets of hardened dowel pins to prevent drilling through the lock housing mogul in the area of the driver pins. Fourth, the lock cylinder assembly of the present invention may incorporate a hardened cylinder shield behind the front face of the cylinder blank to prevent drilling through the cylinder blank.

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

Abstract: A 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: 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 said cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of racks for relocating said plurality of pins; and a rekeying tool receiving aperture defined by said rekeyable lock cylinder; and a rekeying tool comprising: a base plate; and a plurality of spaced elongated prongs, each prong from said plurality of prongs comprising a first longitudinal end adapted to engage a corresponding one of said plurality of racks, each prong from said plurality of prongs dimensioned lengthwise to relocate to a first predetermined position said corresponding one of said plurality of racks, said first predetermined position common to each of said plurality of racks, each prong from said plurality of prongs comprising a second longitudinal end connected to said base plate.

Abstract: A core assembly for a lock includes a core, a sleeve, and a housing. The core has a keyhole longitudinally defined therein. An elongated slot is defined beside and communicated with the keyhole. Multiple lower lock balls are received in the core and not aligned with the elongated slot. The sleeve is securely provided outside the core. The housing is provided outside the sleeve, and has multiple upper lock balls corresponding to the lower lock balls. The lower lock balls are not accessible directly through the keyhole and the elongated slot, so that it is impossible to unlock the lock by a tool without a correct key, and the lock has a high security.

Abstract: A lock assembly includes a lock cylinder, for actuating a latch assembly, including a lock sleeve, first and second lock rotors, having first and second keyways respectively, rototably fitted in the lock sleeve, and a plurality of tumblers for locking up the first and second lock rotors. A key includes a key head having predetermined locking serrations arranged in such a manner that when the key head is inserted into the first keyway, the locking serrations are adapted to unlock the first lock rotor and enable the first lock rotor freely rotating until the first keyway is aligned with the second keyway, simultaneously, the key head being adapted to insert into the second keyway such that the locking serrations are adapted to unlock the second lock rotor to enable the second lock rotor to freely rotate to control the locking and unlocking of the latch assembly.

Abstract: The safety key has a shank (6) which is provided with a plurality of control surfaces (7) for properly positioning tumblers and has a front end and a rear end (6a, 6b). At a front end (4a), the rotor (4) of the associated locking cylinder (2) has at least one further control surface (8), which interacts with a further control surface (9) arranged at the rear end (6b) of the shank (5). The safety key is backward compatible and is relatively difficult to copy.

Abstract: A cylinder lock with a body, in which a plug with a profiled, axially extending key slot is rotatably arranged, and in which the body and the plug are provided with a number of bores approximately perpendicular to the plug axis, in which bores a number of locking pins is provided, said locking pins consisting of tumbler pins and driver pins, and in which the locking pins are lifted by insertion of a key so that the end faces of the tumbler pins flush with the periphery of the plug. With a view to preventing the lock from being opened with a tool which has a striking effect on the locking pins, at least one of the driver pins consists of two members, one member being movable relative to the second one in the longitudinal direction of the pins, and the movable member abutting in the rest position against the second member with a contact portion directed towards the plug.

Abstract: A lock core includes a lower and an upper lock cover and a lock plate. The upper lock cover has the recessed hollow provided with a plurality of recessed holes respectively fitted therein with at least one steel ball. Thus, when a burglar employs an electric drill to break and unlock a lock by drilling through the keyhole of the lock, the steel balls in the recessed holes can stop the electric drill from drilling forward, having excellent effect of anti-theft.

Abstract: A locking device for controlled, reversible security using a control key to set the lock's accessibility to multiple individual keys, thus providing complete control of security. The control key has hierarchy over the individual key(s). Rotating the control key from the first to a second position prevents the core from being actuated by the individual key(s), thus activating a blocking function by which the lock can only be operated by the control key. Returning the control key from the second position back to the first position allows the control key to be removed ( the blocking function is still active). When the control key is rotated from the first to a third position, the core can be operated by the individual key(s), thus inactivating the blocking function. Returning the control key from the third position to the first position allows removal of the control key (blocking function remains inactive).

Abstract: A lock assembly incorporating a number of features designed to defeat attempts to pick or destroy the lock. The lock cylinder assembly employs multiple arrays of pass key pins, making picking of the lock much more difficult. Second, the arrangement of the pass key pins in separate arrays requires that multiple cuts would have to be made into the lock housing mogul or cylinder blank in order to defeat the lock cylinder assembly. Third, the lock cylinder assembly of the present invention may incorporate multiple sets of hardened dowel pins to prevent drilling through the lock housing mogul in the area of the driver pins. Fourth, the lock cylinder assembly of the present invention may incorporate a hardened cylinder shield behind the front face of the cylinder blank to prevent drilling through the cylinder blank.

Abstract: A picklock-proof key slot for a lock device and a key thereof, which comprises a rotary cylinder and a lock casing, between which plural upper tumblers and lower tumblers are furnished; the center of the rotary cylinder is provided with a key slot; under lock up condition, the lower tumblers are pushed into the key slot; the center of the tumbler groove is furnished with a salient plate, of which both sides are furnished with symmetrical guide slots; a guide slot is furnished between the two symmetrical guide plates on the key plate; a plurality of unlock-tumbler holes is furnished on the guide slot between the two guide plates; the hole has a curved surface to fit with the curve surfaces on both sides of the lower tumbler so as to reduce the pushing-up space of the lower tumbler, and also to reduce the possibility of unlocking the lock device with a master key to push the lower tumbler.

Abstract: A lock apparatus includes a housing having a cylindrical bore formed therein and a cam rotatably mounted in the housing. A cylindrical sleeve having a notch formed therein rotatably mounts in the bore of the housing. A cylinder core inserts into the sleeve and engages the cam. The core including multiple tumblers and the housing has a corresponding number of drivers biased toward the bore and engaging the tumblers through the notch and aligned along the periphery of the bore when a proper key is inserted. When the sleeve is rotated, the drivers are captured in their bores, allowing the core to be easily removed without a tube or special tools and providing for simple rekeying.

Abstract: A lock core device of an anti-theft tumbler pin type includes a housing defining a lock core hole, a plurality of first tumbler pin holes, at least one side tumbler pin hole, and a transverse hole, a lock core rotatably mounted in the housing and defining a plurality of second tumbler pin holes which are moved by the lock core to align with the first tumbler pin holes and to align with the side tumbler pin hole, a plurality of tumbler pin sets each slidably mounted in the first tumbler pin hole and each including a top tumbler pin and a bottom tumbler pin movable in the second tumbler pin hole, at least one block pin slidably mounted in the side tumbler pin hole and rested on a peripheral wall of the lock core or inserted into the second tumbler pin hole, and a control tumbler pin set slidably mounted in the transverse hole and including a transverse tumbler pin rested on the block pin.

Abstract: The present invention is directed to a lock with a master cylinder that is highly resistant to pulling. The lock comprises a lock body 10 with a hole, a master cylinder 20 rotatably mounted within the cylindrical hole of the lock body, and tumbler unit 30 mounted in the master cylinder wherein at least one metal pull resistant element 40 is inserted between the outer surface of the master cylinder and the inner surface of the wall of the cylindrical hole in the lock body. The metal pull resistant element prevents the master cylinder from being pulling out of the lock body in an axial direction. The metal pull resistant element 40 may be a ball, a cylinder or a block inserted 20 and held in place between an indentation 21 provided on the outer surface of master cylinder and an annular concavity provided on the inner wall surface of the cylindrical hole for the master cylinder in the lock body 10 and at a location opposite to the indentation 21.

Abstract: A lock cylinder with a cylinder core rotably mounted in a housing and normally locked against rotation by means of pin tumblers comprising core and housing pins mounted in core and housing orifices, spring-loaded against the housing and displaceable into a release position by insertion of a key (2) into a lock channel, wherein the cylidner core has at least one support pin inserted in a radial orifice of the cylinder core and spatially associated with a pin tumbler in such a way that the pin tumbler can be located between the support pin and core pin by interposition of a spacer (9) movably associated with the key (2), wherein the radial bore bearing the support pin extends obliquely to the orifice bearing the core pin, and the direction of movement of the spacer (9) extends obliquely to the broadside face of the key (2).

Abstract: A lock assembly includes a barometric lock cylinder for actuating a latch assembly wherein the barometric lock cylinder including a lock body having an axial rotor hole and a plurality of marble sockets radially distributed on an inner surface of the lock body, a plurality of marbles being coaxially placed in the marble sockets respectively, a tubular compound lock core being rotatably and coaxially fitted in the axial rotor hole of the lock sleeve to define a keyway therethrough, the lock core having a plurality of locking holes radially distributed on an outer circumferential surface of the lock core and a plurality of air channels radially distributed on an inner circumferential surface of the lock core for communicating with the locking holes respectively, and a plurality of resilient elements being coaxially disposed in the marble sockets respectively, and a barometric key including a key handle having a compressible air bag provided therein and a key body having an air conduit longitudinally extended fr

Abstract: The invention relates to a built-in safety device comprising a housing (3) and a rotor (4) mounted therein. Tumblers (8) are mounted in the housing (3) and in the rotor (4). The maximal length (A) of the built-in safety device (1) is approximately 40 mm, and the effective part (2c) of the key (2) is essentially as long as the rotor (4). In addition, the rotor (4) is constructed as one piece and can be operated from both sides thereof. The inventive built in safety device can be installed in a mortise lock more easily than a cross-key bit safety device and permits the production of a locking system.

Abstract: A cylinder lock includes a shell and a plug inside the shell. A locking pin, a sensor pin and a flexible coupling are mounted within the plug. The sensor pin moves the flexible coupling and the coupling moves the locking pin to an unlocked position when the correct key is inserted into a key slot in the plug. The key includes a locking pin receiving notch, to allow the locking pin to move to the unlocked position. The key also includes a contact surface that moves the sensor pin and thereby moves the locking pin to the unlocked position through the flexible coupling. When an incorrect key, without the locking pin receiving notch, is inserted, the flexibility of the flexible coupling allows the sensor pin to move without moving the locking pin. The cylinder lock may also include conventional pin tumblers.

Abstract: A structure of a lockset is disclosed. The lockset structure includes a key and a lock body, wherein the key and the lock hole of the latch are provided with at least one end corner having a skew face with a corresponding angle. Any key with un-matching angle is prevented from inserting into the lock hole so as to avoid other parties to open the lockset with un-matching keys.

Abstract: A picklock-proof key slot for a lock device and a key thereof, which comprises a rotary cylinder and a lock casing, between which plural upper tumblers and lower tumblers are furnished; the center of the rotary cylinder is provided with a key slot; under lock up condition, the lower tumblers are pushed into the key slot; the center of the tumbler groove is furnished with a salient plate, of which both sides are furnished with symmetrical guide slots; a guide slot is furnished between the two symmetrical guide plates on the key plate; a plurality of unlock-tumbler holes is furnished on the guide slot between the two guide plates; the hole has a curved surface to fit with the curve surfaces on both sides of the lower tumbler so as to reduce the pushing-up space of the lower tumbler, and also to reduce the possibility of unlocking the lock device with a master key to push the lower tumbler.

Abstract: A cylinder lock with a body, in which a plug with a profiled, axially extending key slot is rotatably arranged, and in which the body and the plug are provided with a number of bores approximately perpendicular to the plug axis, in which bores a number of locking pins is provided, said locking pins consisting of tumbler pins and driver pins, and in which the locking pins are lifted by insertion of a key so that the end faces of the tumbler pins flush with the periphery of the plug. With a view to preventing the lock from being opened with a tool which has a striking effect on the locking pins, at least one of the driver pins consists of two members, one member being movable relative to the second one in the longitudinal direction of the pins, and the movable member abutting in the rest position against the second member with a contact portion directed towards the plug.

Abstract: A lock construction that minimizes the friction coefficient between the slide pin and the slide pin hole through the design of an arc-shaped indentation formed on each interior wall of the slide pin holes, which receives the rectangular slide pin. The lock construction includes an outer fixed body and an inner rolling body, a hooking recess formed in an inner peripheral surface portion, a receiving recess formed in an outer peripheral surface portion of the inner rolling body, wherein a slide bar having a linearly formed inner side is elastically provided in the locking construction, wherein about five slide pin holes of rectangular shape are formed perpendicular to the receiving recess, wherein an arc-shaped indentation is formed on each interior wall of the slide pin holes.

Abstract: A cylinder lock includes a shell and a plug inside the shell. A locking pin, a sensor pin and a flexible coupling are mounted within the plug. The sensor pin moves the flexible coupling and the coupling moves the locking pin to an unlocked position when the correct key is inserted into a key slot in the plug. The key includes a locking pin receiving notch, to allow the locking pin to move to the unlocked position. The key also includes a contact surface that moves the sensor pin and thereby moves the locking pin to the unlocked position through the flexible coupling. When an incorrect key, without the locking pin receiving notch, is inserted, the flexibility of the flexible coupling allows the sensor pin to move without moving the locking pin. The cylinder lock may also include conventional pin tumblers.

Abstract: A lock has a flat key having a flat blade extending along a key axis and having an axially extending edge formed to each side of a central axially extending key plane with a pair of axially extending inner edge surfaces flanking the key plane and each formed with a plurality of bits offset transversely at different spacings from the key axis. The bits on one side of the key plane are offset axially to the bits on the other side of the key plane as described above. A barrel having an inner surface centered on a lock axis holds a plug rotatable about the lock axis in the barrel, bisected by a plug plane including the lock axis, and formed with an axially extending and open key hole adapted to receive the key with the axes coaxial and the planes coplanar. A respective set of axially spaced tumblers is dis-placeable in the plug to each side of the plug plane parallel to the plug plane. The tumblers of one of the sets engage the key in the hole at locations offset axially from the tumblers of the other set.

Abstract: A cylinder lock (1) comprises a cylinder housing (2), a plug (3) having a key slot (3c), and a driver (20). The cylinder housing (2) has a row of pin channels in a “twelve o'clock” position and a row of pin channels in a “ten o'clock” position, to enable the lock to be operated with a service key that can be inserted in the “ten o'clock” position. A cylindrical latching element (15) surrounds the inner end of the plug and moves in accompaniment with rotation of the plug as the plug is turned with a standard key (8). The latching element (15) is held fixed when the plug is rotated by means of a service key (9). The latching element is designed to co-act with means on the driver that enable the plug (3) to move axially upon transition of the “twelve o'clock” position, wen the plug is rotated by means of the service key. The latching element is held fixed in relation to the housing (2) by means of an intermediate pin (6).

Abstract: A key-operated ignition lock has a housing configured to protectively shield an electrical switch. An operating knob has a tubular body that extends through a first passage defined by the housing, and is rotable therein between a plurality of angular positions including on “off” position. The tubular body defines a second passage wherein elements including a key-receiving plug of a lock mechanism are journaled for rotation between “locked” and “unlocked” positions. Alignable bores formed 1) in the tubular body, 2) in a locking plate that surrounds the tubular body, 3) in the plug, and 4) in a barrel that surrounds the plug support an end-to-end arrangement of pins that permit a suitably configured key to be inserted into the plug only when the knob is in its “off” position, and to permit the knob to be rotated out of its “off” position only when the key is removed from the plug.

Abstract: A cylinder lock and key combination, wherein the lock comprises a side profile ridge (60) disposed in the key slot (53) and having a relatively shallow recess (61), in which a projection (55) on a side tumbler (54) is vertically movable, and a continuously extending edge portion (62). The key has a relatively shallow coded groove (17), which cooperates with the side tumbler projections (55) of the lock, and a rectilinear, deeper profile groove (16), into which the edge portion (62) of the side profile ridge fits. This unitary edge portion secures a good guidance of the key when the latter is inserted into the lock.

Abstract: A system having a non-duplicatable key and a lock cylinder for the key, in which the radius (4) of the non-toothed edge of the key (1), i.e.

Abstract: Improved squiggle keys and cylinder locks include a squiggle key groove formed along a first broad surface of the squiggle key and a plurality of bittings formed along a second opposite broad surface of the squiggle key. The cylinder lock includes a plurality of rotatable discs that have groove-following elements that are rotated via the groove on the key. The rotatable discs operate to prevent a plug of the cylinder lock from rotating unless a correct squiggle key is inserted into a keyway in the plug. The bittings formed along the second opposite broad surface of the squiggle key are generally circular and have inner regions with a different depth than outer regions of the bittings. As a result, tumbler pins can be located along the inner and/or outer regions of the bittings which enables increased keying capabilities and variations and which enables a common lock to be operated by keys for different cylinder locks.

Abstract: The present invention relates to a detachable cylinder lock, which includes a case shell having an axial row of conic pin-holes for avoiding the pins falling out; a cylinder having a row of pinholes, in which a lower pin is located, corresponding to the pinholes of the case shell; the cylinder has an axial keyhole for a key inserting in, and a slant face (or a conic face) for the convenience of the cylinder inserting into the cylinder hole of the case shell; a follow block has a hole for the rear lug of the cylinder inserting in, and a cross hole penetrating through them for a fastening component screwing in or out.

Abstract: An improved lock structure, and especially a lock structure in which a stepped shaped wall of the key hole in the lock core can be cooperated with a key to allow the key to be drawn out regardless of its angular position. The lock core can also be rotated from an unlocking position to a locking position without the key; convenience thus is increased. Besides, a plurality of pusher pins are allocated in multiple directions to increase the difficulty of unlocking by a thief, this can thereby increase theft-proof effect.

Abstract: A door lock particularly suited for an apartment or condominium where the resident has an entry key and management personnel also have a key that will allow access to the apartment, the door lock having a spring loaded axial pin which is retained in an externally visible position when the lock is actuated by the resident's key and which is released to an externally non-visible position when the lock is actuated by the management key.

Abstract: An all-in one tool usable by the locksmith in servicing of interchangeable core locks, for lock pin removal and decoding, and lock core repinning and recapping. The tool comprises a body having a central core receiving channel extending therethrough; a plurality of cylindrical bores extending through the body and perpendicularly intersecting the core receiving channel; and a receptacle receiving channel in the body located below and in communication with the core receiving channel; and a removable pin receiving receptacle slidably received in the receptacle receiving channel. The pin receiving receptacle has a plurality of pin receiving pockets extending perpendicularly from the core receiving channel of the body generally in alignment with the cylindrical bores. The pin receiving receptacle may take either of two forms: a hinged form that opens like a book to reveal the captured lock pins, or a solid block form that contains slots in which the captured pins are visible.

Abstract: The lock bolt has a bolt tip (2) a bolt head (3) whose back wall (4) is intended to rest against a housing pin for sliding this pin into the rotary closure cylinder (24). The bolt tip (2) is supported on the bolt head (3) with a spring engaged between the bolt tip (2) and the bolt head (3) so that it can slide in a limited fashion between an inner and an outer position. The bolt head (3) has a longitudinal bore (5) in which the bolt tip (2) is supported so that it can slide. The lock bolt to a large extent prevents unlocking attempts in which vibrational movements are exerted on the tumblers.

Abstract: A locking cylinder (1) with a cylindrical housing (2) of which the core bore (7) receives a cylindrical core (8) having a key channel (9) with core pins provided in the cylindrical core and housing pins displaceably guided in housing pin bores, the housing pins being resiliently biased by springs in the direction of the core pins, and with at least one additional, core-adjacent tumbler element (15) adjacent the wide-side profile of the key, the element (15) being displaceable in a cavity (H) crossing the rotational interface of the cylindrical core, the tumbler element being spring biased in the outward direction of the core and having a control projection (22, 51) projecting sidewards into the key channel (9, 43).

Abstract: A pick resistant lock assembly has two lock sections which can be opened in two stages separated by time using a single key. Both lock sections share the same multiple stacks of locking pin tumblers which engage the machined depths provided on the key, but only the first lock section includes a key plug.