Abstract: An anti-theft brake locking mechanism for a motor vehicle. The motor vehicle includes one or more brake pedals disposed adjacent an interior surface of the vehicle. The anti-theft brake locking mechanism selectively maintains the brake pedal in a depressed position so as to actuate the vehicle brakes in order to prevent movement of the vehicle. The mechanism includes a hook portion engageable with the brake pedal stem, a neck to which the hook portion is mounted, and a base portion. The base portion is selectively secureable to and releaseable from a pedestal mounted to the vehicle floorboard.

Abstract: A cylinder guard including a plurality of guard plates, at least one of which is formed with a plurality of non-rotatable bolt head seats and a plurality of bolts having heads non-rotatably seated in the non-rotatable bolt head seats and arranged for mounting the cylinder guard onto a door.

Abstract: An electronic door lock is provided with a single control knob used for entering a predetermined combination through manipulation of the knob in a first arc of rotation, the code being entered by pushing the dial inwardly to bring a push pad into contact with individual ones of an arcuate array of electrical switches provided on a printed circuit board within the lock dead housing, the release of the door locking bolt being accomplished after entry of the predetermined code by further manipulation of the control knob through remaining portions of knob rotation which are unavailable until after entry of the predetermined code. A digitally operated code input pad assembly is also provided to enter such code and a second code to open a second lock mechanism associated with the door spring bolt giving two levels of security for the human passage door.

Abstract: A mail box for an apartment building comprising a number of individual mail boxes corresponding to the number of tenants. Each mail box has an individual mail box lock. Releasable locking means are connected to the mail boxy for covering the individual mail box locks until mail is to be removed to prevent theft. Unlocking means are provided for unlocking the releasable locking means to expose the individual tenants lock so they can get their mail.

Abstract: A removable steering wheel assembly to aid in the prevention of theft of vehicles. The removal of the steering wheel renders the vehicle undrivable by a potential thief.A first embodiment of the present invention contemplates removal of the steering wheel and key ignition to render the vehicle undrivable.A second embodiment provides a removable steering wheel and cover to prevent the attachment of other steering wheels.

Abstract: A contractible handcuff with a switch on its body to control a motor in the body for normal or reverse rotation in order to extend or retract a handcuff which is designed with a plurality of slots, a chain and a hook operating in a manner that the handcuff can bend and bind any substance it touches immediately by nature of its structure, a slightly curved flexible metal tape, and the hook can lock such substance in place.

Abstract: An electronic, code-operable lock attachment, having a shank adapted to fit, and be fixedly attached to, a standard mortise lock, and having a flange-like rim portion, a housing fixedly attachable to the rim portion of the shank, an actuating shaft passing in an axial direction through the housing and the shank, a bolt-operating arm fixedly mounted on one end of the shaft and adapted, in the mounted state of the electronic lock attachment, to engage the bolt of the mortise lock. The lock attachment also includes a handle fixedly attached to the second end of the shaft.

Abstract: A key composed of a body with recesses which can be filled with magnetized disks, arranged in a combination of norths and/or souths and/or lack thereof, and with a sliding lid holding the magnetic disks in the recesses. The lock has one or two sets of magnetic sensors geometrically ordered according to the refillable recesses. When the key is placed adjacent to the series of magnetic lock sensors, the sensors detect the magnetized disks, pass the detected signal to a conventional converter-codifier circuit that generates a code that is sent, by cable or radio, to a station which interprets the code and, if correct, allows access.

Abstract: Invention patent for "Safety Lock" comprised by a mechanism (1) having a case composed of two parallel plates (2) interconnected by spacers (3), internally provided with an operating drive (4) for a latch bolt (5) and for a latch (6), this latter being also operable by means of a handle or alike, which passes through a corresponding opening (7), and, further, having a barrel block (8) incorporated in said mechanism (1) in transversal direction and being provided with a longitudinal hole or passage (9) which receives a puzzle barrel comprised by one or more rows of spring pin assemblies positioned radially with respect to two barrels (10) inserted in said passage (9), each of which has a cam configurating, eccentric and internal pin (11) which cooperates with the operating drive (4), said book (8) being retained within said mechanism by a drawer-like arrangement.

Abstract: An inside lock for the latch of a camper shell or other similar structure has a housing which is fixed on the inside of a door with a bore surrounding an actuating rod extending from a lockable handle on the outside and rotatable therewith. The actuating rod, for example of square section, normally carries an actuating member which releases latch members at the periphery of the door on rotation of the handle. A removable member, for example a pin bent into a U-shape, is inserted in a transverse hole or holes in the housing, with a part of the pin abutting a surface or surfaces on the rod, preventing rotation thereof. This provides for locking the handle from rotation on the inside, even though the handle lock is released.

Abstract: There is disclosed a novel locking device adapted for use with a length of flexible cable. The locking device comprises a body member designed to receive a flexible cable and a pivotable cable retaining member pivotally associated with one end of the body member and designed to work in conjunction with the body member to engage the flexible cable thereby allowing for the simple engagement of articles to be locked together.

Abstract: An apparatus for releasing locked components of a theft-deterrent device includes a seat for receiving a component of the theft deterrent device that contains a clutch and a ferromagnetic anvil that is positioned by a spring to force the clutch to apply pressure against an inserted pin that is anchored in another component of the device so as to restrain the pin from release from the clutch; and a magnet with a pole piece coupled thereto, with the magnet and the pole piece being disposed for movement between a protracted position and a retracted position. When magnet and the pole piece are in their protracted position the pole piece is disposed about the sides of the clutch-containing component and applies magnetic flux from the magnet that is directed to overcome the force of the spring and reposition the ferromagnetic anvil to thereby relax the pressure applied against the pin by the clutch so that the pin-anchoring component can be released from the clutch-containing component.

Abstract: The dead bolt lock assembly includes a lock cylinder mounted by the door and extending into the room interior and having a lock handle with a cross bar portion. A security device has an end portion having a longitudinal notch opening through the terminal transverse edge thereof to proved to longitidinally extending legs. The legs have opposite longitudinal surfaces that converge in a direction toward the terminal edge, the surface of the legs most closely adjacent the lock cylinder when in use having transverse ribs extending away therefrom. The legs are extendable between the cross bar and the lock cylinder housing until the legs are in binding engagement therewith prevent the lock handle from rotating and thus prevent one from unlocking the door outside of the room using the right key for unlocking the door. The above mentioned surfaces are planar.

Abstract: The ignition interlock system prevents movement of the ignition switch of a motor vehicle from the "Off" position to the "Lock" position unless the transmission selector is in the "Park" position. The ignition interlock system includes a locking lever spring biased to lock the reciprocable slide of the ignition switch mechanism when the transmission selector is not in the "Park" position. The locking lever is unlocked from the reciprocable slide by energization of a solenoid in response to the transmission selector being placed in the "Park" position with the ignition key inserted in the ignition switch. A control circuit energizes or deenergizes the solenoid in response to input signals representing the transmission selector position and the ignition key in/out position.

Abstract: A lock protector (1) for the barrel (17) of a key operated lock (2) which comprises a sleeve (3) to fit over the barrel (17). The sleeve (3) has a rotatable keyway protector (7) located adjacent the keyway (6) of the lock (2), the keyway protector (7) having a slot (10) therein which aligns itself with the keyway (6) for use. The width of the slot (10) together with the distance between the external portion of the slot (10) and the keyway (6) prevents objects other than the correct key shank from being inserted within. The lock protector (1) is also provided with a retaining means (4) to prevent longitudinal movement of the barrel (17) within the sleeve (3) once assembled.

Abstract: A security device for a trailer hitch or similar article which engages with an outwardly extending peripherial flange around the trailer hitch or similar article, and which includes an element which extends into a coupling opening in the trailer hitch or similar article, thus precluding removal of the security device from the trailer hitch or similar article. A padlock is utilized to deter unauthorized removal of the security device from the trailer hitch or similar article, and the security device includes means to protect the shackle of the padlock from unauthorized removal.

Abstract: A dial lock assembly suitable for use on a slide fastener comprises a male part and a female part interengageable therewith, the male part having a plunger adapted to move into and out of the female part, a lock tumbler pivotably engageable with the plunger and, a rotary means operatively associated with the lock tumbler and frictionally driven by a dial carrying indicia thereon such as numerical figures, the combination of which being selected to lock and unlock the assembly.

Abstract: A locking device for locking instruments such as boat sonar units to their mounting brackets includes a key tumbler housing and a casing surrounding the key tumbler housing so that the tumbler housing rotates within the casing when a key is inserted in the tumbler housing, and remains locked in a fixed position when the key is removed. A threaded stud unit is connected to a rearward end of the tumbler housing which engages with a threaded hole in the instrument body when the tumbler housing is turned with the key. The instrument is locked to the bracket by passing the threaded stud through an opening in the bracket and engaging the stud within the threaded hole in the instrument body. A stop member is provided on a rear face of the casing which seats within the bracket opening, so that when the key is removed from the tumbler housing the locking device cannot be unscrewed from the instrument.

Abstract: A pin lock device which can be permanently attached to the frame of a sliding curtain shutter type door. The pin lock device has a rigid body with a bore which may be attached to the frame of the shutter type door. A bolt located in the bore is movable between first and second positions in the bore, but cannot be completely withdrawn. The bolt can be immobilized in the locked position in the rigid body, thereby allowing the sliding shutter door to be locked, and is restrained from being fully withdrawn in the unlocked position to allow the bolt to be safe from loss or tampering when the sliding shutter door is opened.

Abstract: A lockable key box having a tubular receiver portion with an integrally formed mounting flange, and a closure plug which is lockably receivable in an open end of the receiver portion. The closure plug is formed of an inner sleeve which fits within the outer sleeve formed by the receiver, and a master key-operated cylindrical lock mechanism which is retained within the inner sleeve so that a locking plunger extends from the lock mechanism through a transverse bore in the inner sleeve to engage a locking recess in the outer sleeve. The locking plunger is outwardly-biased and has a bevelled leading face so that the closure plug can be inserted into the receiver portion without using the master key. The receiver portion has a substantially continuous transverse cross section, so that it can be formed of extruded material, such as high strength extruded aluminum alloy.