Abstract: An auxiliary door lock for a dead bolt lock includes a relatively flat rectangular housing for mounting on a door over the interior operating knob of the dead bolt lock; and an actuator slidable and rotatable in an opening in a front wall of the housing. The actuator includes a hollow handle, which is used to rotate the knob. Teeth on the actuator mesh with teeth in the housing in one position of the actuator so that the latter and the knob cannot be rotated when the door is locked. Thus, even using a key, someone outside of the door cannot unlock the dead bolt lock. By pushing the actuator into the housing to a second position, the teeth are disengaged and the actuator can be rotated to unlock the dead bolt lock.

Abstract: A securing mechanism is provided which can be attached to a conventional meter box lid which does not require the lid to be redesigned. The securing mechanism comprises a holding member attached to the latch on the underside of the lid. A threaded aperture is formed in said holding member. A bolt having a threaded shaft is extended through the upper wall of the lid from the top side to be secured into the threaded aperture of the holding member for preventing a key from moving the latch member to a release position. In the embodiment disclosed, the bolt has a head with two spaced apart apertures formed therein for receiving two prong of tool for allowing the bolt shaft to be screwed into and from the threaded aperture for locking and release purposes.

Abstract: A door assembly is disclosed that includes a latch-side stile with bores for accommodating one or more bolts that extend through the stile and into an adjacent doorjamb to secure door with respect to the doorjamb. A reinforcing plate is mounted on the inner edge of the latch-side stile with flared flanges extending into the stile bores to hold the plate in place and to make it more difficult to force the door open by kicking the door in the area of its latch and lock. A method of assembling a door including such a reinforcing plate is also disclosed.

Abstract: An improved burglarproof locking device for a vehicle is disclosed. The locked status of the locking device is not released by a strong impact or by an external magnetic force, thereby preventing the car from being stolen. Thus the reliability of the locking device is improved.

Abstract: A device for temporarily disabling a doorknob attached to a hinged door. The device covers the doorknob with a rigid enclosure, preventing rotation of the doorknob to move the associated locking bolt. A retaining unit is mated with an extension from the rigid enclosure in a male-female relationship, simultaneously with fitting the retaining unit over the outer edge of the hinged door while ajar. Closure of the door into the associated doorjamb, with the enclosure over the doorknob, prevents parting movement between the enclosure and the retaining unit, providing a self-locking feature.

Abstract: An electronic locking system comprises a cylinder housed within and rotatable with respect to a shell. A key has a power supply. At least one of the key and the cylinder is capable of generating a signal when the key is electrically connected with the cylinder. An electrically powered locking mechanism is housed within the cylinder and includes a lock member moveable between an open position and a locked position. The lock member in the locked position interferes with movement of the cylinder. A power source is connected to the locking mechanism in response to the signal. The locking mechanism allows movement of the lock member from the locked position to the open position in response to the signal so that the cylinder may be rotated within the shell. The cylinder further includes an interfering member that resists movement of the locking member. In addition, a biasing mechanism urges the cylinder toward a home position when the cylinder is rotated away from the home position.

Abstract: As herein described a plastic or metal hollow frame device which when mounted within the bolt cavity on a door frame and therefrom extending outwards with curved ‘U’ shaped arms through the strike plate aperture mounted concentric with and above the said frame bolt cavity, and thence into the space between the door frame and the edge of the closed door, i.e. the door gap, upon which door is mounted an associated spring bolt door lock, in such a manner that when the spring bolt is located within the strike plate aperture and the frame bolt cavity, i.e.

Abstract: A lock-and-alarm assembly includes an escutcheon formed with a through-hole. A lock core is formed with a keyway that can be accessed through the through-hole. A blind is detachably mounted in the through-hole for blocking access to the keyway through the through-hole. A switch is connected to the blind and is actuated upon removal of the blind, which, in turn, results in actuation of an alarm.

Abstract: A lock nut designed for securing a nut on bolt, specifically for those situations in which the bolt cannot be rotated and the bolt is located proximate to an object that can obstruct the ability to rotate the lock nut on the bolt. The lock nut can change form by the addition of pieces, the removal of pieces, or by changing the shape of a single piece. The lock nut is designed such that in one form it can be threaded onto the bolt and, thereafter, it can be changed in form and locked into this new form, the new form being such that the lock nut cannot be fully rotated on the bolt without encountering an obstruction, thus preventing the ability to remove the lock nut.

Abstract: The deadbolt thumbturn assembly of the present invention includes a thumbturn including a thumbturn extension, which is inserted through a bushing collar and rose bearing, then secured with a retaining ring such that the thumbturn extension is able to rotate within the bushing collar. The threaded bushing collar is then inserted through the aperture of the deadbolt rose and secured with a retaining ring forming a deadbolt thumbturn assembly such that the threaded bushing collar is able to rotate with respect to the deadbolt rose. The thumbturn assembly is then attached to the deadbolt lock by fastening the bushing collar to the threaded boss of the inside housing and inserting the extension of the deadbolt actuator into a receptacle of the thumbturn.

Abstract: A tamper evidence device for a secure housing containing electronic circuits includes a zinc air cell and a bi-stable latch circuit connected to be powered by the cell. The zinc air cell requires a supply of oxygen for activation of the cell. Normally when the secure housing is intact and unbreached, a pad seals an aperture for ingress of oxygen to the cell and the cell does not generate any electrical power. However if the secure housing is opened or otherwise breached the pad is displaced and oxygen enters the cell and electrical power is generated to power the latch circuit and thereby set the bi-stable latch circuit to provide evidence of the breaching of the secure housing.

Abstract: The invention is directed to a device to protect a deadbolt assembly from tampering. A deadbolt assembly comprising a deadbolt reciprocable along a longitudinal axis, and a deadbolt actuating mechanism having an axis transverse to that of the deadbolt, is protected from intrusion and tampering by a pair of protective shells which encircle the actuating mechanism. The shells are generally cylindrical and of like structure and opposite orientation. Each shell comprises a ring and a circumferentially extending protective structure which extends axially toward the ring of the other shell. A preferred protective structure comprises a plurality of projections, including an arcuate tongue. A gap or opening in the protective structure permits actuation and movement of the deadbolt without interference with the shells.

Abstract: A protective sleeve for a padlock includes a sleeve body having an open inserting end adapted for insertion of a lock body of the padlock into the sleeve body, a restricting end opposite to the inserting end and adapted for abutting against the lock body, and a surrounding wall extending between the inserting end and the restricting end and adapted to wrap fittingly around the lock body. The sleeve body is formed with a key opening adapted to be aligned with a keyhole of the lock body. A cover flap is hinged to the sleeve body at the key opening, and is movable pivotally between an open position adapted for permitting access to the keyhole, and a closed position adapted for closing the keyhole. The cover flap is formed with a plug adapted to be inserted into the keyhole when the cover flap is moved to the closed position.

Abstract: A lock for a large-sized lid in a shape of flat plate includes a one piece lock mechanism. In an article storing compartment for a scooter type vehicle, an article storing chamber is provided at an inner cover. An opening of the article storing chamber is covered with an openable/closable lid. The lid is fastened to the inner cover by means of a swingable first claw. The first claw is locked by a lock mechanism and the first claw is capable of being unlatched by a manually operable swing knob attached to the first claw. The lock mechanism is provided in a position remote from the first claw. The lid may be fastened to the inner cover by a second claw extending from a key cylinder of the lock mechanism.

Abstract: A high security T-handle assembly for supporting a lock cylinder, includes an elongate handle having a passageway therethrough for key access to the locked cylinder along with a housing for containing the locked cylinder. The housing includes an opening therein for enabling projection of a locking pin exterior to the housing. First screw threads are formed on a circumference of the housing on one end of the housing and second screw threads are formed on the handle into one side thereof for engaging the first screw threads in order to secure the handle to the housing. At least one set screw is disposed in the handle for engaging the housing for preventing the unscrewing of the handle from the housing.

Abstract: A security device which is mounted on a door adjacent a deadbolt lock. The security device is a chain which will have a link with a ring at one end which is passed around the knob on the deadbolt to prevent the deadbolt knob from being turned and, therefore, opened.

Abstract: A portable security device which can be easily mounted on inwardly swinging doors. the device is made up of a inner plate which has first and second panels, an outer plate which has first and second panels, a hinge connecting, and permitting rotation between, the second panel of the inner plate and the first panel of the outer plate, a securing attachment, and a holding mechanism. The first and second panels of the inner plate are perpendicular to each other. The first panel of the inner plate fits against the strike plate and has a lock tab which fits into the bolt hole in a strike plate. The second panel of the inner plate fits against side edge of the door jamb and contains a horizontal protrusion which contains an opening. The first panel of the outer plate contains a horizontal slot which will fit over the protrusion when the device is in place, thus exposing the opening of the protrusion. The second panel of the outer plate is perpendicular to the first panel.

Abstract: A deadbolt cover has a hollow housing mountable to a door. A deadbolt actuator knob on the door fits through a hole in the housing so as to be fully contained within the housing. A cover is slidably mountable into snug mating engagement within an opposite second hole in the housing so as to close the housing over the knob. The cover is releasably lockable onto the housing by a locking member mounted to the housing releasably engaging a cooperating female receiver in the cover.

Abstract: A dead-bolt locking device for preventing a dead-bolt lock from being picked open. The dead-bolt locking device includes a generally rectangular support member having a back side, a front side, a front end, and a back end, and also having a track disposed in the front side and extending through the front end and terminating near the back end; and also includes a locking member having a back side, a front side, a front end, a slot extending through the front end and being adapted to receive the handle of the dead-bolt lock, and a boss integrally attached to the back side and being slidably received in the track; and further includes a handle member integrally attached to the front side of the locking member.

Abstract: This vehicle security device (40) is a metal plate (38) bolted to a door handle unit inside a vehicle door to prevent unauthorized unlocking of a vehicle door by jamming a thin tool into a vehicle door. And, device (40) prevents unauthorized unlocking of a vehicle door by inserting a thin tool between the seam between the window glass and the flexible molding around a door window frame of a vehicle door. When installed, the device (40) blocks access to the inner end of a lock cylinder (10) by preventing the insertion of thin tools directly to the inner end of the lock cylinder (10). This device (40) is comprised of a configured metal plate (38), angled on its upper end to extend horizontally toward the inside of a vehicle door; one or more bolts (43); one or more spacers (42); and one or more lock washers (41). The metal plate (38) has a rectangular-shaped cut out (45) to accommodate placement adjacent to the key-turnable inner end of a door lock cylinder (10).

Abstract: A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position.

Abstract: A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position.

Abstract: A deadbolt security attachment, removably installable on a deadbolt latch handle by an occupant within a room or structure, made up of a flexible strap which secures to the deadbolt handle, is wrapped about the shank of a doorknob, and is extended to secure to itself, the strap facing surfaces including hook and loop securing material. When the present device is secured between the doorknob shank and the deadbolt latch handle, the latch handle cannot be moved through its normal arc of operation to allow the door to be opened. Even if a person attempting entry to the area has a key to the deadbolt lock, the torque which may be transmitted to the lock by the key, is easily overcome by the present security strap. The present device is completely removable from the doorknob shank and deadbolt latch handle to be carried by the user when the room is not occupied.

Abstract: An improved key system incorporates a number of electrical components. In one main aspect, the key is provided with electrical communication to components on the vehicle when the key is inserted into the ignition. The key connects to an antenna associated with the vehicle, such that the combined antenna size is greater than would otherwise be possible. In this application, the antenna is utilized for garage door opener purposes, and a switch is mounted on the key for actuation of the garage door opener. In another aspect, the key is recharged when inserted into the ignition. Further, the key may be provided with various other functions such as memo, vehicle deactivation, two-way communication, and other security applications. In embodiments of the key, the switches are positioned relative to a thumb area such that inadvertent actuation of the switches is made less likely.

Abstract: An auxiliary lock includes an exterior lock assembly having a knob and an actuating plate that is connected to the knob to rotate therewith. A casing is mounted inside a door for rotatably supporting a knob that is also connected to the actuating plate to rotate therewith. A control plate is mounted in the casing and includes a first end extended beyond the casing for manual operation. A second end of the control plate includes a notch releasably engaged with one of a number of teeth of an engaging wheel mounted in the casing. The control plate is movable vertically and retained in place by a positioning element. The engaging wheel is connected to the actuating plate to rotate therewith.

Abstract: Disclosed is a security device for securement to a door in association with a latch mechanism having a face plate and knob to selectively prevent unauthorized turning of the latch mechanism and knob. The device includes a plate for securement to the door in association with the face plate of the latch mechanism. A hood element selectively prevents rotation of the latch knob, the hood element being reciprocable relative to the plate means into and out of engagement with the latch knob. The plate and the hood element preventing rotation include cooperating locking mechanisms when the hood element is brought into contact with the latch knob. There is also a release mechanism for releasing the locking mechanisms. Preferably the locking mechanisms are of the pawl and ratchet type.

Abstract: A lock for safes and other security devices is disclosed having a case mountable on the inside of a safe door. A locking bolt in a slidable relationship within an opening in the case, moves between locked and unlocked positions. A gate, constrained in slidable relationship by and with the locking bolt, normally prevents the locking bolt from moving out of the locked position. An internal case extension obstructs the gate, when the lock is not activated, preventing the locking bolt from moving towards the unlocked position. A camming member, pivotally attached to the locking bolt, repositions the gate allowing the locking bolt to move out of the locked position. A solenoid driven armature, linked to the camming member and connected to the locking bolt, pivots the camming member and moves the locking bolt to the unlocked position. The locking bolt is held in the locked position when not activated by a spring.

Abstract: A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position.

Abstract: An anti-tamper locking assembly for locking a position of a block, such as a locking bolt in an electronic lock, electrically moves a pin to engage or dis-engage the block. When dis-engaged, the block can be moved and access or the like can be made. The pin is selectively moved electronically in order to allow access, entry or the like. The pin can be moved with, e.g., a solenoid. The pin has an overhanging portion, or a head portion. In order to prevent an individual from forcing the pin into an un-locked position, the head portion operates in conjunction with at least one spring-arm member and a blocker which are fixed to the block to prevent a user from being able to strike the device with a hammer or the like to "temporarily" move the pin to a position allowing the block to be moved and access or the like to be made.

Abstract: A door lock arrangement for motor vehicles with a closing cylinder arrangement (2) attached to outer sheet metal (1) of the body of a vehicle so as to be accessible from the outside and with a lock mechanism (5) attached in the body to be inaccessible from the outside. On the closing cylinder arrangement (2) there is transfer element (6) which establishes the connection of closing cylinder arrangement (2) to the lock mechanism (5). A corresponding coupling element (7) on the lock mechanism (5) engages the transfer element (6) by form-fit such that rotary motion of transfer element (6) is converted into a corresponding rotary motion of the coupling element (7).

Abstract: A door handle assembly is described comprising a mounting base, a cover plate, an inner cylinder and a lock mechanism wherein the cover plate covers the means for attaching the handle assembly to a door. The handle or grip holds the cover plate in place and the lock mechanism holds the handle in place. The handle assembly cannot be removed without the removal of the lock mechanism.

Abstract: A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position.

Abstract: A dead bolt lock cover for a dead bolt lock assembly comprises a cover and a lock assembly. The cover is sized to enclose the lock casing of the dead bolt lock assembly to prevent unauthorized tampering therewith. The lock assembly fixes the cover to the dead bolt lock base or a separate base member. With the lock assembly, only an authorized person can gain access to the lock casing of the dead bolt lock.

Abstract: A deadlock bolt or key bolt securing assembly adapted to be fastened to a door or panel by an adhesive is provided. The assembly includes a base supporting member and a locking means having a locking arm for positioning the locking means over an operating key or handle to prevent the key or handle from being turned from the outside. When a lock is in the open position, the locking arm may be laid back against the supporting door or panel.

Abstract: A locking cover for a dead bolt lock assembly that permits a user to put it in one of three positions: neutral, locked and unlocked. The cover in the neutral position permits the operation of the bolt lock assembly normally. The other positions limit the rotational travel of the actuating shaft to one quarter of a turn. The actuating shaft is rotated by turning the locking cover that includes a central tubular cylinder that for selective engagement with the actuating shaft. A pin mounted on the interior of the cover is receivable within one of three holes on an annular base plate that limit the rotation of the actuating shaft. An annular base plate with a through opening includes a perpendicularly disposed tubular member that has an inwardly extending flange that together with an annular plug and a retainer ring keep in place a spring member biasing the cover towards the annular base plate assembly.

Abstract: An interior door lock assembly includes a casing secured to an inner side of a door plate and including a central hole and two diametrically disposed holes. A switch button has a stub extended through the central hole to engage with a tail piece of a lock core to rotate therewith. A press button assembly is mounted to the switch button and includes a seat securely mounted in a compartment defined in the switch button. A spring-biased press button is partially, slidably mounted in the seat. When the switch button is in a latched position, the press button is pressable to engage with one of the holes of the casing to prevent from unlatching of the interior door lock assembly from outside of the door plate.

Abstract: A locking cover for a dead bolt lock assembly that permits a user to put it in one of three positions: neutral, locked and unlocked. The cover in the neutral position permits the operation of the bolt lock assembly normally. The other positions limit the rotational travel of the actuating shaft to one quarter of a turn. The actuating shaft is rotated by turning the locking cover that includes a central tubular cylinder for selective engagement with the actuating shaft. A pin mounted on the interior of the cover is receivable within one of three holes on an annular base plate that limits the rotation of the actuating shaft.

Abstract: A protector block is constructed so as to be urged in a key extracting direction and movable in a key inserting direction and is provided with radially outwardly projecting engaging portions which come into engagement with an outer lock cylinder when the protector block is pushed in. The overall length in the key inserting direction of the protector block can be shortened and hence it is possible to construct a handle locking device in a compact shape. Further, in the case where the protector block is fabricated by sintering, the green compact density in powder molding can be made more uniform because it is possible to shorten the length in the key inserting direction.

Abstract: A locking bracket (1) includes a 3 mm mild steel plate (2) having two opposed longitudinally extending edges (3, 4) and two opposed transversely extending edges (5, 6). A locking formation in the form of an upstanding protrusion (7) is welded to plate (2) for selectively captively retaining a locking device such as a padlock (8). An aperture (10) in plate (2) is longitudinally spaced apart from protrusion (7) for receiving a bolt (11) which extends from padlock (8). In use, bolt (11) passes through aperture (10) and like apertures formed in a first and a second article which are to be locked.

Abstract: A security indicator has a two part telescopic locking bar attached to the handle of a door at one end and to the door or door jamb at the other end through an end piece. The device includes a cup or tube which encases the door handle, preventing use of the handle. The length of the bar is fixed by aligning apertures in each part of the telescopic locking bar to form a continuous aperture, inserting a frangible pin through the continuous aperture and locking the frangible pin in place with a padlock received by a hole in the frangible pin. The pin has a narrow portion which can be broken by relatively little human force. The device requires someone who does not have the key to the padlock on the frangible pin to break the frangible pin to enter a door fixed with the device. A broken pin alerts the occupant that an entry has occurred during his/her absence. A sleeve normally protects the narrow portion but slides easily away to expose the narrow portion when entry is desired.

Abstract: A device for blocking access to a lock associated with a door when the door is closed includes a body having an arrangement for covering an operating interface of a lock associated with the door, an arrangement formed as a part of the body for selectively attaching the device to the door, with the attaching arrangement including a face portion for extending across a portion of the face surface of the door, a strike portion for extending across a portion of the strike surface of the door, and an arrangement formed in the body for preventing removal of the covering assembly from the door when the device is mounted to a door.

Abstract: A key cylinder device in which, in a locked state, a lock-releasing mechanism is provided so as not to operate even if a cylinder case swings. When a first lever rotates in a counterclockwise direction with respect to the cylinder case, a shaft provided on a second lever extends from a side surface of the second lever and engages with a third lever to move a rod attached to the third lever in a lock-releasing direction. Further, when the first lever does not move relatively with respect to the cylinder case, even if the cylinder case swings, the shaft does not extend from the side surface of the second lever and does not engage with the third lever. For this reason, there is no possibility that the rod attached to the third lever move in the lock-releasing direction.

Abstract: An access control system for preventing access to underlying fasteners, and otherwise preventing tampering with the underlying control panel. A base plate is affixed to a base that is fastened to the underlying structure with standard fasteners. A cover plate is slidably disposed over the base plate and includes a key operated cylinder plug. The cylinder plug is inserted through the cover plate, base plate and into a receiving aperture in the base. A locking mechanism within the cylinder plug engages the base, and prevents the sliding disposition of the cover plate from the base plate.

Abstract: An apparatus is adapted to prevent the theft of a wheeled vehicle having air brakes (e.g., large trucks and buses). A brake valve is selectively actuated by linear movement of an exposed knob that is located adjacent a supporting structure in the cab, and a valve housing is mounted behind the supporting structure. A new structural base is permanently connected to the valve housing in an exposed position in the vehicle's cab. The base is normally accessible to the driver at all times, but it is thin enough so that it will not interfere with normal push/pull movement of the valve's knob. A rigid and generally hollow cover is adapted to be selectively suspended over and in contact with the structural base. The cover is sufficiently deep as to envelop the valve's knob in order to conceal it and render it inaccessible when the cover is suspended over the base. The cover is selectively removable from the base so as to permit the driver to remove the cover and thereby have access to the knob.

Abstract: A cylinder lock is provided having a sleeve rotatably receivable within the inner core of a sleeve. A cylinder retainer is slidably mounted within a cylinder retainer slot in the cylinder for radial movement therein. The cylinder retainer is movable between a first cylinder retaining position wherein the outer end of the cylinder retainer projects from the cylinder, a second retracted position wherein the outer end of the cylinder retainer is retracted within the cylinder. A slam resistance pad is mounted within the cylinder lock between the cylinder retainer and a stop surface in the sleeve such that if a thief attempts to remove the cylinder from the sleeve, the slam resistance pad is compressed between the cylinder retainer and the stop surface in the sleeve and dissipates the impact force on the cylinder retainer.

Abstract: A security locking assembly comprises a face plate locatable upon a dead bolt lock having a turn knob and a C-shaped component. The face plate has first and second apertures extending through it above and below the turn knob. A planar member with a circular hole is affixed to the face plate and extends within the dead bolt lock opposite from the turn knob. The C-shaped component includes a first horizontal bar, a second horizontal bar and a vertical bar. Each horizontal bar has an inboard end and an outboard end. The vertical bar includes an upper end, a lower end and a center point. The first and second horizontal bars are pivotally coupled in a generally perpendicular orientation to the upper and lower ends of the vertical bar, respectively. The vertical bar is pivotally coupled to the planar member by a hinge pin coupled through the aligned central hole of the vertical bar and circular hole of the planar member.

Abstract: Unlocking of a vehicle door by insertion of implements other than the door key into the door is prevented by a guard housing within the door into which the key turnable inner end of the lock cylinder extends and which also encloses an otherwise vulnerable portion of the linkage which interconnects the lock cylinder and the door latching means. In a preferred form of the invention, the housing has an extension which extends below the lock cylinder and which is angled to extend to the outer shell of the door and then downward along the inner surface of the shell and which extends between the shell and the side impact beam of the door. The guard may secured in place by the same bolt that secures the handle assembly to the door and is wholly within and concealed by the door.

Abstract: A vehicle anti-theft system comprises a mechanical anti-theft device adapted to be attached to a vehicle steering wheel to limit rotation thereof, and an electrical anti-theft device remotely controlled by a transmitter in the mechanical device and operable to inhibit starting of the vehicle engine when the mechanical device is in its mounted position. The mechanical device includes a key operated lock mechanism for locking the device to the steering wheel and a supplemental lock mechanism for maintaining the locked condition of the device in response to tampering with either the key operated or the supplemental lock mechanism.

Abstract: A voluntary key restricting device attached to the interior side of an entry door to prevent the unlocking of a cylinder locking dead bolt mechanism by any outside key or burglar cylinder lock picking device. This device will prevent a dead bolt knob from rotating regardless of the angular locked position of the knob without the addition or removal of supplemental parts. It is self contained, requires no tools to install, requires no modifications to an existing door and has a built in child deterrent locking feature.

Abstract: The present invention relates to a system for reinforcing door frames and doors, and in particular to a unit including twin plates which are joined one to the other transversely through the door and which are positioned on the outside and on the inside of the door to reinforce the same at the level of the handle, the latch and the dead bolt. An inner plate is also proposed which is hidden in the door frame to reinforce the same at the level of the dead bolt.