Abstract: A locking device for manhole inner covers is disclosed. The locking device is operated only by an authorized key thus almost completely protecting the underground arrangements such as pipes, drains or wires from unauthorized persons, who intend to reach the arrangements with the object of damaging or breaking the arrangements. The locking device is cased by a longitudinal channel type housing. Two reciprocating units are arranged in the housing so that the arrangement of the units inside the housing is point-symmetric about the center of the housing. Each unit has a plurality of regularly-spaced gear holes, which selectively engage with the asterisk part of a key. A locking bolt is coupled to each reciprocating unit and fully projects or retracts from or into the housing. A keyhole panel is movably seated on a central member so that the keyhole panel can move in a vertical direction. The keyhole panel has an asterisk keyhole.

Abstract: A lockable doorknob enclosure for use on doorknobs of the type having a knob attached to a shaft having a longitudinal axis. The lockable doorknob enclosure comprises: a containment structure having a sealable cavity for enclosing the doorknob and a portion of the shaft; an adjustable spacing mechanism; and a locking mechanism. The containment structure includes first and second pivoting structures which are preferably connected by a hinge. The first and second pivoting structures form a containment cavity of a size sufficient to receive therein the doorknob and a portion of the shaft when the pivoting structures are pivoted into a first, or closed, position. The containment structure has an aperture therethrough of dimensions sufficient to allow the shaft to be installed through the aperture when the first and second pivoting structures are pivoted into a second, or open, position.

Abstract: A security device for a vehicle type steering wheel which includes a multi-section rim protection arrangement having a circumferential skirt portion, which may be of concave cross section, to shield the rim of the steering wheel. An elongated member is attached to one of the rim protection sections for placement across the steering wheel rim, with an extension out from the rim which is long enough to limit rotation of the steering wheel. The security device is locked into position by locking fixtures that have an unlocked state for permitting the relative movement or rotation of the rim protection sections for placement on the steering wheel rim, and a locked state in which the security device is fixed in place on the steering wheel.

Abstract: A locking device adapted to be mounted upon a hand brake lever handle of an automobile in a manner to prevent theft of the automobile includes a tubular inner sleeve adapted to attach to the handle, and a tubular outer sleeve which removably and telescopically engages the inner sleeve. A lock located at the upper extremity of the outer secures the outer sleeve to the inner sleeve, thereby preventing access to an underlying depressable brake release button on the lever handle.

Abstract: A security device for an automobile type steering wheel includes a two-section rim protection arrangement having a circumferential skirt portion, which may be of concave cross-section, to shield the rim of the steering wheel. The rim protection sections are attached to two elongated beam members which are placed across the steering wheel rim, with an extension out from the rim which is long enough to limit rotation of the steering wheel. The two beam members are locked in position by locking fixtures which have an unlocked state permitting relative movement or rotation of the two rim protection sections for placement on the steering wheel rim and a locked state in which the security device is fixed in place on the steering wheel. Other embodiments include a unitary, central locking security device having locking fixtures which extend under a steering wheel rim and are locked in place.

Abstract: An improved gladhand security lock apparatus is locked to a gladhand brake line coupler to immobilize a trailer. The body of the security lock apparatus is formed with an abutment surface from which depends a clevis wall and a retainer turned back from the clevis wall and spaced from the abutment surface forming a tongue receiving bight. A guard plate is formed on an end of the body and a clip with an upturned rail member is formed parallel to the guard plate and spaced therefrom. The security lock apparatus is attached to the gladhand coupler so that a tongue of the gladhand is received in the tongue receiving bight, the abutment surface of the security lock apparatus overlies a port of the gladhand coupler, and a retainer flange formed on the gladhand coupler is received between the guard plate and the clip. The security lock apparatus body comprises a barrel. A lock housing is formed in a bore in the barrel perpendicular to and confronting a keeper bolt positioned in a keeper bolt receiving bore.

Abstract: An attachable vehicle hand brake lock assembly capable of being selectively attached over the end of a push button-activated hand brake to prevent its release. The lock assembly includes a cylindrical shaped body designed to be placed longitudinally over the upward extending end of the hand brake handle. The body includes an upper lock, a central threaded section, and a lower, threaded clamping section. The lock assembly also includes an outer sleeve with internal threads capable of being interconnected with the threads on the body enabling the sleeve to be moved upward and downward over the body during use. When initially attached to the handle, the lower section which is made up of two clamping arms is slanted and biased outward away from the outer surface of the handle to enable the lock assembly to slide easily over the handle. When the sleeve is rotated and moved downward over the clamping arms, their inner surfaces are forced inward against the handle to hold the lock assembly in place thereon.

Abstract: An anti-theft device for protecting air brake control valves from being manipulated is disclosed. A clamp assembly locks on to the valve knobs employed to release the air brakes in a vehicle. A pair of blocks incorporate a key lock assembly and posts to enable portable use of the device. This device is readily adaptable to lock more than one type of several standard brake valve knob sizes by utilizing removable inserts. Impact-resistant plastic or metallic compositions may form the bodies.

Abstract: A plug-in socket for amplifiers, loudspeaker boxes, electric musical instruments etc. is described. The plug-in socket has a socket member for the introduction and holding of an electrical plug and at least two electrical contacts engageable with the plug. Furthermore, it includes a blocking member adapted to be introduced into the socket member and to be locked therein. The blocking member prevents an unauthorized introduction of an electrical plug into the socket.

Abstract: The invention is an interlocking lockout device for a computer system. The lockout device comprises a locking disk dimensioned similarly to a floppy disk for so that it can be inserted and locked into a disk-drive. An engagement member of the locking disk interlocks with a bezel. In a locked position, the bezel covers the disk-drive preventing the locking disk from being removed from the disk-drive and preventing foreign matter from being inserted into the computer and disk-drive. While inserted, the locking disk keeps the computer system from booting and thereby prevents unauthorized operation of the computer system. The bezel and locking disk are adaptable on any size disk-drive and can easily be installed on different systems. This provides a lockout capability for computer systems with multiple drives and variable sized disks.

Abstract: A tailgate release handle security device for attachment to a tailgate incorporates a cover comprising a metal plate and an integral inwardly extending skirt having a rim which bears against an outer panel of a tailgate. A pair of hooks, attached to the skirt, extend outward through a pair of apertures in the tailgate release handle recess and bear against the back of the tailgate outer panel. A cylindrical lock, mounted in the plate, has a locking dog which presses outwardly against the upper edge of the back of a tailgate release handle when the security device is attached to the tailgate.

Abstract: In accordance with the invention, a fish tank is provided with an internally extending flange that circumscribes the top opening of the tank. A cover, having a screened opening, rests on the top of the tank and includes on its undersurface a locking mechanism which, by rotation of a removable key, engages the flange and prevents removal of the cover.

Abstract: A television receiver signal blocking system is provided which includes a television receiver, a television signal source and a television signal blocking mechanism therebetween. The television signal blocking mechanism includes a box from which electrical conductors are connected to the television receiver in a signal source, such as a television cable. Within the television signal blocking mechanism or box is a rotatable matching member which includes a latching arm and a switch carrying arm. The latching member is rotatable between three positions which permit the television signal blocking box to be opened to gain access to its interior while cutting off or blocking the signal; a second position in which the box is latched closed and the signal is not blocked; and a third position in which the box is closed and the signal is blocked.

Abstract: A security container, and a security cover that is locked via a locking mechanism onto the security container. The security cove is sized to fit snugly and substantially overlap the security container to prevent a prying instrument from being inserted between the security cover and the security container. Further, the long sidewalls create an overlap of the security cover and security container to hinder any attempt to insert a prying instrument between the container and the cover, further frustrating attempts to pry the cover off of the container.

Abstract: Lockable covers are used to cover either of two types of shield blocks to prevent access to circuits within either of two types of external ports on computing devices. Each such shield block covers the port contacts associated with these circuits, includes locking surfaces for holding the lockable cover in place, and is itself held in place by the attachment features provided on the external port for holding an external cable in place. One such shield block is held in place by a pair of screws extending into threaded holes in the external port, while the other such shield block is held in place by a pair of flexible wire bails rotatably mounted in the external port.

Abstract: A door lock security device is disclosed for locking over the shaft of a door lock rotary knob or a door knob. The device comprises an inner cover which is further comprised of first and second shell portions having an opening between them for closing around the shaft of the door lock rotary knob or door knob, an outer cover which substantially encompasses and overlaps the inner cover to sufficiently shield the inner cover to prevent tampering, and a lock for releasably securing the outer cover to the inner cover. When the inner and outer covers are engaged together around the shaft they prevent the door lock rotary knob or the door knob from being manipulated from a closed to an open position. In one embodiment the first and second shell portions of the inner cover are hingedly attached along one edge while in a further embodiment the first and second shell portions are releasably secured together in a closed position at an opposite edge by a clasp.

Abstract: A locking manhole cover and key combination of the present invention is in the form of a manhole cover having a lock on its undersurface and a vent hole through the manhole cover. The lock comprises a plurality of locking bars spring biased to a locking position, a rotatable actuator accessible through the vent hole for moving the locking bars to an unlocking position with the key being fittable through the vent hole to operate the actuator. The key itself includes a first shaft portion turnable in the vent hole for rotating the acutator and pulling the locking bars to the unlocking position and a second shaft portion which when located in the vent hole prevents rotation of the actuator and holds the spring biased locking bars away from the locking position.

Abstract: An adjustable lock for a cassette tape player for preventing the theft and unauthorized use of the cassette tape player is disclosed. The adjustable lock comprises a housing mounted outside of a tape receiving chamber. The housing has a hook extending rearwardly and laterally outwardly therefrom so as to be insertable into one end of the tape slot in the cassette tape player and a bolt extending rearwardly and laterally outwardly from the housing whereby the engaging end of the bolt is insertable into the end of a tape slot opposite the hook. The adjustable lock also includes a tubular key lock assembly which mounted on the face of the housing is operationally associated with the bolt. In particular, the tubular key lock assembly is adapted to extend or retract the bolt by a distance rearwardly from the housing which is adjustable.

Abstract: A locking device for a video cassette recorder and/or player having a panel with an opening formed therein in which a video cassette is to be inserted and a movable cover closing the opening includes a lock restricted to operation by authorized personnel from outside the video cassette recorder for selectively permitting and preventing movement of the cover.

Abstract: A lock box having a housing and a lid mounted to said housing. The housing has a ridge mounted about its inner periphery adjacent its open side. A retainer on the lid which is complementary to the ridge is mounted over the ridge to retain the lid in its mounted position. A spring biased pin is mounted to the lid and extends between a retracted position where the lid can be removed from the housing and an extended position where the lid is locked to the housing. A lock controls the position of the pin as it moves between the retracted and extended positions.

Abstract: A latching mechanism is provided for enabling perimeter locking for doors and the like. A diaphragm is provided which engages a surrounding frame along the perimeter of the diaphragm. Slots in the diaphragm enable a reduction of the diaphragm perimeter by movement of a central portion of the diaphragm in a direction perpendicular to the original plane of the diaphragm. When the diaphragm perimeter is reduced, simultaneous disengagement between the perimeter and the surrounding frame occurs.

Abstract: Apparatus and methods involving an attachable and lockable, vented security cover enclosure for the back of a personal computer dimensioned to conform to the computer configuration, cover cabling and cable connectors, and deter unauthorized access to the system components, power switch, and the back of a computer.

Abstract: A jack security device, especially suitable for standard telephone jacks mounted at a panel of an access cabinet, can either prevent unauthorized access to a secured empty jack or prevent removal of a plug from a jack in use. An end portion of the device partially covers the plug receiving jack opening. The main body of the device carries a key-actuated tumbler and slides into an access cabinet housing recess adjacent to the jack. A locking tab carried by an inner end of the tumbler engages a surface provided in the housing to place the device in a locked condition with the flanged end portion partially covering the secure jack. Additionally, arrangements within the access cabinet are provided for overriding a locked condition of the device without the need for a lock actuating key.

Abstract: This invention relates to an apparatus for keeping a spare key in the car. Only when the numbers of the revolving rings are set to the predetermined numbers, a spare key can be taken out because the cap of the apparatus is released from an inlet of the fuel tank. Although a driver has lost his car key or locks the door with his key being left in the car or he does not have a key, he can drive his car by utilization of a spare key which is installed under the fuel tank cap. In case his secret number for the spare key is known to others, he can easily change the number to a new number. And accordingly, although the number for his spare key is disclosed to others, an immediate change of the number prevents his car from being stolen.

Abstract: A lockable closure for the exhaust pipe of an internal combustion engine is provided. The exhaust pipe closure finds particular application as an immobilization and theft prevention device on motor vehicles and comprises a lockable cap adapted to fit onto an extender tube (or the exhaust pipe, which has been suitably modified). The cap includes a pair of jaws which may be urged outwardly by means of a plunger to engage a locating formation in either the exhaust pipe or the extender tube.

Abstract: A security device for a thermostat comprising a housing for said thermostat, a lid member secured to the housing for movement between an opened position and a closed position, to gain and prevent access to the thermostat, respectively. The thermostat has a rotatable thermostat adjustment shaft extending exteriorly of the housing for manual manipulation thereof. A lock member is mounted in the housing for movement between a first position whereat the lock member lockingly engages the adjustment shaft to prevent rotation thereof and engages the lid member to prevent opening thereof and a second position whereat the lock member is disengaged from the adjustment shaft and the lid member permitting manual manipulation of the shaft or opening of the lid member and a key-operated actuating member disposed in the housing and extending exteriorly of the housing for displacing the lock member between its first and second positions.

Abstract: A deterrent device for inhibiting unauthorized use and sale of a video cassette recorder having a cassette chamber provided with a chamber opening and a hinged door normally closing said chamber opening in which the device includes a front panel to cover the opening, inwardly projecting members carried on the panel and extending through the chamber opening into the interior of the cassette chamber for moving the door into a position for engagement by said inwardly projecting arms to restrict and prohibit outward movement of the device, and an unlock element carried by the front panel and positioned within the chamber for movement against the door to lift the door from its engagement with the inwardly projecting arms for permitting release and removal of the device from said chamber and opening.

Abstract: A tape cassette player locking mechanism which comprises a container of the general configuration of a cassette adapted to be inserted into the player and including a locking mechanism preventing removal of the container without damage to the player. The invention comprises two integral portions, namely, an internal portion that is of dimensions substantially equivalent to the dimensions of a typical tape cassette and is therefore adapted to be inserted into the cassette compartment of a cassette player, and an external portion which is designed to be accessible at the front of the cassette player and which provides a locking device such as a key lock for locking and unlocking the mechanism of the present invention.

Abstract: A security cover lockably engageable with surface mounted apparatus for preventing unauthorized access to the apparatus. The security cover includes a shell with peripheral sides which closely conform to the size of the apparatus over which it fits, and a pair of tangs on the shell edge wedgable between the apparatus and the surface. A key lock is mounted within the outer surface of the protective cover and includes a slotted finger rotatable with the lock cylinder. The fastener with which the apparatus is fixed to the surface is replaced by a double-headed fastener and is engageable with the slotted finger to thereby lock the protective cover to the apparatus. In the alternative, another apparatus screw is replaced with a double-headed fastener and, instead of tangs, a side edge of the cover is slotted for engagement with the second double-headed screw.

Abstract: A locking cover apparatus for underground fuel tanks includes a cover having a depending annular flange mountable over the open end of a fuel tank filler tube. A lock is mounted on a boss secured to the bottom surface of the cover and rotates a plate between a locked position and an unlocked position. A plurality of lock bars are pivotally attached to the plate and are extensible and retractable through apertures in the depending flange and apertures in the filler tube for attaching and releasing the cover from engagement with the filler tube. First and second cover members respectively cover the lock and the boss in which the lock is mounted on the cover. Specially configured keys are insertable into cavities formed in the first and second cover members to permit authorized removal of the cover members from the cover.

Abstract: A fuel tank lock for use with a conventional filler neck of an automotive vehicle. The filler neck has a baffle plate formed with a constricted passage normally closed by a biased-shut valve carried by the baffle plate. The valve is forced open when engaged by an unleaded fuel nozzle. The upper end of the filler neck is provided with a conventional fuel tank cap. The fuel tank lock includes a body provided with a key operated lock and a shank that extends through the constricted passage. The lock operates a latch that engages the underside of the baffle plate to prevent unauthorized withdrawal of the lock from the filler neck.

Abstract: An armored and locked cover to protect the cap on a standpipe which forms a connection to a source of valuable liquid such as gasoline. The cover includes a lower portion retained primarily by the standpipe cap and an upper cover portion having predeterminately positioned dogs and lock latches to engage similarly positioned slots in the lower portion for locking the two portions together. Bearing means are provided between the lower portion when a threadably retained cap is used so that rotation of the device does not result in rotation and disconnection of the cap which otherwise would allow the removal of the device.

Abstract: An anti-theft device for preventing the unauthorized removal of T-tops from an automobile including an enclosure for enclosing and preventing access to the T-top handle. A key actuated latch plate secures a separable cover to base plate forming the enclosure and is operative to hold the cover nested on the base plate until locked.

Abstract: A plug assembly for a fuel filler neck includes a subassembly of a cap and latch which may be inserted in the end of a fuel filler neck without the lock assembly. Subsequent to the subassembly being installed in the fuel filler neck the lock assembly may be inserted and secured in a nonremovable fashion relative thereto rendering the fuel filler cap lockable and operable.

Abstract: A fuel tank lock for use with a conventional filler neck of an automotive vehicle. The filler neck has a baffle plate formed with a constricted passage normally closed by a biased-shut valve carried by the baffle plate. The valve is forced open when engaged by an unleaded fuel nozzle. The upper end of the filler neck is provided with a conventional fuel tank cap. The fuel tank lock includes a body provided with a key operated lock and a shank that extends through the constricted passage. The lock operates a latch that engages the underside of the baffle plate to prevent unauthorized withdrawal of the lock from the filler neck.

Abstract: Multiple, interconnected shielding portions (26,28,30) constitute a protection structure (22) which may be arranged relative to a console (10) in an obstructing position so as to shield instruments contained in the console (10) from damage. The multiple shielding portions (26,28,30) are relatively displaceable to permit common occupation of all the shielding portions (26,28,30) in an envelope formed by one of the shielding portions (26). Such common occupation or self-storing design permits the protection structure (22), when removed from the console (10), to be stored in a minimum of space. The protection structure (22) may be assembled in obstructing relationship with the console (10) by displacing the individual shielding portions (26,28,30) to predetermined positions prior to interconnecting the console (10) and one of the components (28) with tabs (38) connected to the component (28) into slots in the console (10).

Abstract: A wheel cover locking assembly comprises a knob in which a plastic bolt is rotatably mounted, the bolt extending through a wheel cover and engaging a nut carried on a bracket affixed to a wheel by means of lug nuts, so that rotation of the bolt locks the wheel cover on the wheel. A cam piece located inside the knob and hidden by a snap-in decorative cover can be rotated by means of a simple key to clutch and de-clutch the knob to and from the bolt. The simplified and economical construction tends to be impervious to water and dirt.

Abstract: A filling connection for vehicles driven by internal combustion engines, which is fastened in an opening of the car body and has one section disposed on the inside of the car body adapted to be connected to a line leading to the fuel tank, while a section disposed on the outside is provided with an inner or outer thread onto which a lid may be screwed, and an axially effective sbaling is arranged between the lid and the section disposed on the outside.

Abstract: A locking assembly for electrical enclosures to prevent unauthorized tampering with internal power connections. The locking assembly comprises an adjustable bracket which is secured to the walls of the enclosure by bolts; a cover which covers the open front and a substantial part of the sides of the enclosure and which is secured by a bolt to the adjustable bracket, a locking shield which overlies and prevents removal of the bolt which attaches the cover to the adjustable bracket, and a removable lock bolt which secures the shield to the cover.

Abstract: A lockbox is disclosed, as for use in hotel closets, which includes an above-floor container fixed to define a space with a rectangular opening for closure by a locking cover. The cover incorporates a peripheral double ridge defining a peripheral channel to receive the upper edges of the container. Pairs of latching cam members are pivotally affixed at central, diametrically opposed locations in the cover, for actuation by a centrally located lock movement for engagement and disengagement with slots in the container. The movement is accomplished through a symmetrical linkage mechanism which simultaneously actuates each of the individual cam members and which incorporates a pair of parallel arms extending between pairs of the cam members and a pair of linking arms extending from the parallel arms to the lock movement. The pivotal support shafts for the cam members also serve as spacer mounts to support an internal cover for the locking mechanism.

Abstract: A cylindrical money box assembly that is received in a housing through a generally circular opening thereof and has a locking mechanism with a plate that is rotatable to position projecting portions in relation to a set of parts of the housing. In one position of the plate, corresponding to an unlocked state, the projecting portions are located to clear the set of housing parts allowing insertion of the money box assembly into the housing, and removal therefrom. In another position of the plate, corresponding to a locked state, the projecting portions engage and interfere with the set of housing parts to securely lock the money box assembly to the housing.

Abstract: A billiard cue chalk cube holder, having a base plate mountable on a flat surface by screws, nails, or the like, is provided with a lockable cover which is internally partitioned to form one or more chalk cube receptacles. The cover has an internal latch which is rotatable by a key to alternately engage and disengage slots in the legs of a U-shaped member attached to the base plate. When the cover is attached to the base plate, the nails or screws securing the base plate to the supporting surface are completely concealed, thereby discouraging theft of the chalk cubes.

Abstract: A lock device comprises a cylindrical container securable by split clamps to the frame of a device, and is adapted to store a case-hardened chain. The container has "pass-and-catch" notches at one end for receiving penultimate links of the chain, when the chain is used to lock a device. The container is closed by a lockable cap, which closes the upper ends of the notches to anchor the chain ends. The entire accessible portion of the structure, including the clamps, the container, the cap, and the chain, is of case-hardened steel. The clamps are secured to the container by tamper proof fastening elements. A preferred embodiment includes a container and a lockable cap having splining tongs formed from the rim portion thereof, and has clamps secured to a bicycle post by tamper proof bolts. The rim of the container is bent over at opposite sides to form keeper portions under which ends of a lock-controlled latching bar may be moved.