Abstract: A vehicle protective guard with an arm and a carrier member which in assembled relation encircles the housing of a steering column. When assembled a stop on the arm underlies the transmission shift on the steering column to prevent sufficient movement of the lever to engage the transmission. The stops on the arm also project into the path of spokes on a steering wheel to limit the extent to which the wheel can be turned to steer the vehicle. To facilitate installation and use of the guard the arm is removably connected to the carrier by a hinge joint which permits the arm to pivot to locking and released positions.

Abstract: A cover mechanism for covering a lock, having a key opening, on a lock support surface includes a cover plate which may be pivoted between a closed position in which the key opening of the lock is covered, and an opened position in which the key opening is exposed. A detent arrangement engages the cover plate at a first point to hold it in its opened position until a key is inserted into the key opening and rotated towards an unlatching position, whereupon the detent arrangement engages the cover plate at a second point and prevents movement of the cover plate into its closed position. The cover plate is released when the key is withdrawn from the lock such that the cover plate is free to move into its closed position.

Abstract: A strap to cover an ignition lock cylinder is provided and consists of a hollow housing having a lockable cover pivoted thereon to encompass the ignition lock cylinder. The housing is secured to a steering post by a band that fits around the post and into the hollow housing to be affixed therein. When the cover is closed and locked the ignition lock cylinder is prevented from being used. When the cover is unlocked and opened the ignition lock cylinder can be operated without completely removing the strap from the steering post.

Abstract: An automobile anti-theft device includes a cover that fits over a steering column-mounted ignition lock, and a flexible element that wraps around the steering column and secures the cover thereto. A gear shift lock bar is attached to a sidewall of the cover, and extends laterally from the cover, wraps around a column-mounted gear shift lever, and includes a free end that extends back under the tension bearing element to be secured thereby. The device protects the ignition lock from tampering and in addition prevents the gear shift lever from being moved into gear in the event that the ignition lock is bypassed.

Abstract: The accessory locking device including hingedly connected shells having confrontable flanges that have convexly curved outer surface portions, each flange having a notch therein. A keeper tube has a slot so that the keeper tube is longitudinally slidable over the convexly curved portions of said flanges. Secured to the keeper tube is an auxiliary cylindrical lock having a projectable and retractable bolt, said bolt being projectable through a hole in the keeper tube so as to provide obstructive interference with the notches in said flanges. In this way, the keeper tube cannot be slidably withdrawn from the flanges until the bolt is fully retracted from the notches.

Abstract: A locking system that consists of two locking mechanisms protected by a dl resistive shutter plate. The shutter plate can be rotated to expose a first lock which when unlocked allows it to be further rotated to uncover the second lock. Upon unlocking the second lock, the drive for the main bolt lock can then be actuated.

Abstract: A tamper-resistant lock assembly includes a pair of cooperating keyway guard plates, each of which has a keyway formed therethrough. The guard plates are laterally displaceable relative to one another for movement between an open position, in which the keyways thereof are substantially aligned to allow for passage of at least a portion of a key shank therethrough, and a closed position, in which the keyway of one of the guard plates is at least partially blocked by the other of the guard plates. A uniquely-configured key is also disclosed for use in combination with such guard plates.

Abstract: Disclosed is an auto anti-theft ignition switch lock for preventing unauthorized access to the ignition switch which is mounted on the steering column of most conventional automobiles. The ignition switch lock includes a housing, one end of which is shaped to conform to the contours of a steering column, having a latched enclosure member which is shaped to adapt to the column for securement of the device to the steering column. The device further includes a housing and a movable access door therein which is shaped to conform to the contours of a pair of long narrow uniform furrows which is manifested beneath the surface of a pair of interior walls within the housing, stops, guide surfaces and a key operated latch for selectively controlling the movement of the door, which moves along in constant frictional contact with the smooth surface of the pair of hollowed out furrows.

Abstract: The cash box of a vending machine is protected by a heavy steel door or pair of doors which are locked across the front of the juke box covering the cash box, the door or doors being mounted on a framework consisting of steel straps which wrap around the back, and preferably the top and bottom as well, of the vending machine and interlock in such a way that they can be installed without screws, bolts or other fastening structure and will positively be locked into place when the barrier door or doors are closed. This configuration eliminates the need to mount a barrier door onto the vending machine, which is somewhat time consuming and tricky due to the strength of the mounting that is required.

Abstract: A security cover is provided for the lock boxes of vending machine doors and the like wherein a bracket is mounted around the keyway and a closure is hinged to the bracket such that it will swing shut defining an enclosure and can be locked in this closed position with a lock that is accessible only from within the enclosure, there being an opening in the enclosure, preferably through the closure member, permitting access to this locking means to free the closure, thereby providing access to the door lock.

Abstract: A protective box for providing a secure covering for a closure device, such as a lock, bolt, or the like. The protective box includes a housing having a rear wall which has an opening therein for access to the closure device to be protected. The rear wall is securely fastened onto the support surface containing the closure device, such as onto a door or wall supporting a lock. A cover member closes the front of the housing and is slidable between a closed position providing an enclosed area within the housing into which the closure device can face, and an open position whereby access can be had to the closure device. A lock mounted on the cover member engages with a roller assembly provided in the housing to securely retain the cover member in its closed position. In a modified form, two locks can be mounted on the cover member for engagement with associated latching elements disposed on the housing.

Abstract: A double safety latch includes a housing with first and second lock means carried thereby. The second lock means is mounted in axial alignment behind the first lock means in the housing with restraining means engaging the second lock means to restrain actuation thereof. Closure or blocking means are associated with the first lock means for blocking access to the second lock means and the restraining means. Actuating means is provided to engage and remove the blocking means from the first lock means for then accommodating access of the actuating means to the restraining means to disengage the restraining means from said second lock means to enable said actuating means to unlock the second lock means.

Abstract: A combination door handle and security locking system in which the conventional door latch is actuated by turning the five-sided head of an operating shaft with a special socket wrench. A hinge plate having a slot for a padlock bail and a flat index tab on its inner surface is rotated to cover the operating shaft head. The tab must fit against one side of the operating shaft head to allow the hinge plate to be fully closed so that a padlock can be inserted in the bail. The latching mechanism is designed so that this tab will fit against one side of the operating head when the door is fully latched, to thus prevent rotation of the latching mechanism. The free end of the hinge plate has an offset portion which serves both as a sleet hood for the padlock and as a handle for opening the door.

Abstract: Access-limiting apparatus comprising a body through which an access passageway is formed. A second passageway is formed in the body at a position intersecting the access passageway and a lock plate is slidably movable in the second passageway to a locked position closing the access passageway. Locked means on the lock plate and the body cooperate to secure the lock plate in the locked position. A key plate which is matched with the lock plate is provided with lock release means operable to engage the lock means so as to release the lock plate from the body.

Abstract: A tamper-resistant locking arrangement is provided by positioning a pair of key-actuated cylinder locks in coaxial relationship within a housing. One of the locks is adapted to be selectively removed to provide access to a key-receiving end of the other lock spaced inwardly from the end of the housing.

Abstract: A lock shielding assembly for preventing unauthorized access to a lock by providing a shield over the lock which can easily be removed by authorized individuals, while requiring an unauthorized person an extensive amount of time to open. The assembly includes a housing which can be superimposed over the front face of the lock. The housing includes a slot positioned between a front and rear wall and includes cooperating openings in the walls providing access to the key hole of the lock. A shield plate is slidably mounted in the slot for movement to and from a position covering the lock. A plurality of pins extend into the front wall, selectable ones of the pins extending through the front wall and into engagement with the shield plate to retain the shield plate in its position covering the lock. The location of the selected pins are known only to the authorized user who can easily remove them, while the unauthorized individual must remove all or most of the pins.

Abstract: An enclosure, for housing a manually operated lock, comprising a wall which may be mounted on either the lock or a door to surround the lock and, if necessary, its striker plate. A cover is pivotally mounted on the wall and provided with a key-actuated lock to prevent unauthorized operation of the manually operated lock.