Abstract: A method and a device to prevent unauthorized use of combustion engine driven vehicles, ships, equipment, as well as engines only, including the steps to remove at least one spark plug, to attach a device having an externally threaded part as replacement for the removed spark plug(s), said part having an embracing outside member, which by means of a locking mechanism can be brought into a freely rotatable state in relation to the threaded member, thus preventing removal of same, or, alternatively, bring said members into an interlocked relationship, thus enabling the device to be attached or removed from the engine.

Abstract: A vehicle security system includes a door locking mechanism and control circuitry which prevents access to the vehicle interior unless a door lock key is used thus making it unnecessary to specifically lock the doors upon exiting the vehicle. Steering shaft lock means are also energizable by operation of the door lock key permitting elimination of the ignition key and lock cylinder.

Abstract: A device for preventing the stealing of a motor vehicle of the type having a steering wheel mounted in front of a panel such as the instrument panel or dashboard of an automobile or motor boat.

Abstract: A cartridge mounted in a sleeve on the exterior of a motor vehicle door receives a planar card having raised, conductive indicia for completing an electric circuit on a plate forming a part of the cartridge. The circuit energizes a solenoid attached to an interior door handle of the vehicle for rotating the handle to unlock the door when the vehicle keys have been lost, misplaced or inadvertently left in the ignition, and the doors of the vehicle have been locked.

Abstract: Each of a pair of housings is affixed to a corresponding side surface of a trailer and terminates at an open end at a forward surface of the trailer. Each of a pair of rigid elongated locking bars is retractably slidably mounted in a corresponding one of the housings and each is anchored at its first end in its housing. In retracted position, the locking bars are in the housings and extend to the forward surface of the trailer at their second ends. In extended position, the locking bars extend out of the housings for most of their lengths beyond the forward surface of the trailer to operative proximity with a rearward surface of the tractor in spaced parallel relation. Eyes are affixed to the rearward surface of the trailer.

Abstract: An ignition switch lock for preventing unauthorized access to the ignition switch of an automobile or similar vehicle is disclosed. The ignition switch lock includes a housing, one end of which is shaped to conform to the contours of a steering column. The device further includes a pair of movable jaws which may be moved into engagement with and locked around the rotatable portion of the ignition switch, and means for selectively controlling the movement of the jaws for securement of the device to the steering column.

Abstract: A steering column ignition switch protective guard having a cup member overlying and surrounding the ignition switch and a pair of flexible metal strap members each fixed adjacent one end to the cup, extending in an opposite direction around the steering column and each having an eye adjacent the other end through which the shackle of a padlock extends to retain and lock the protective guard on the steering column.

Abstract: An elongated lengthwise extendible and retractable brace is provided and equipped with structure for releasably locking the brace against retraction thereof. The brace includes opposite end portions for telescopic engagement with coacting abutment portions of motor vehicle seat cushion and seat back portions which are engageable with each other to limit rearward swinging of the vehicle seat back portion to its operative position in which it is used when the operator of the vehicle is seated in the driver's seat. The seat back portion is forwardly swingable to a position abuttingly engaged with the steering wheel of the vehicle. During forward swinging movement of the seat back portion, the coacting abutment portions of the seat back portion and seat portion which limit rearward swinging of the seat back portion to the operative position are displaced apart.

Abstract: An improved steering column ignition lock protective device having a casing with a shackle pivotally attached at a first end of the casing with a bolt lock positioned at a second end of the casing adapted to engage through an aperture in the shackle when the device is positioned around a steering column.

Abstract: A theftproof automobile steering wheel lock comprising a rigid bar adapted to be attached diametrically to the steering wheel with one end at least extending beyond the rim of the wheel a sufficient distance so that rotation of the wheel in either direction is limited by engagement of the protruding end with an interior direction of the vehicle or operator.

Abstract: A tamper-proof lock housing is provided for enclosing the ignition lock of an automobile which is ordinarily mounted on the steering column of the automobile. The housing is in two halves; the bottom half fitting about the lower half of the steering column, and is secured thereto. The upper half fits down over the lower half and the ignition lock is securely joined thereto by connection breakers so that the two then box in the ignition key switch. The auto safe lock box protects the steering wheel lock and the ignition key.An auxilliary alarm system is provided consisting of a separate battery, additional horn, voltage regulator and a time delay switch. This could work solely off the auto safe lock box itself, or it could work from an alternate lock installed on the outside of the car.

Abstract: A vehicle lock for releasably locking an engine block of a motor vehicle to an abutting transmission wherein the transmission housing has a plurality of bolt holes disposed in the peripheral portion thereof and the engine block has a plurality of registered bolt holes in marginal flanges integral with the engine block. A bolt having a head portion on one end and a threaded portion on its other end is received in one of said engine block and transmission housing registered bolt holes and has a length projecting therefrom. The projecting threaded end of the bolt is inserted into an aperture in the closed bottom end of a cup member that has an upwardly extending cylindrical wall and an open top. A nut is threadably received on the threaded end portion of the bolt and the nut is disposed within the cup member and spaced from its open end. Spaced inwardly from the open end of the cup are a pair of opposed apertures and a shackle of a padlock passes therethrough them.

Abstract: A locking device for the pedals of a motor vehicle is comprised of a first rigid support with a first rigid bar mounted at one end to the first support and perpendicular thereto. A second rigid bar is mounted at one end thereof to the first rigid support and in spaced relation and parallel to the first rigid bar. A second rigid support is mounted to the other end of the first and second rigid bar and parallel to the first support. At least and preferably one of the above elements are positionably removable. A locking means is provided to lock the positionably removable element or elements and fix the position of the structure.

Abstract: A vehicle ignition switch lock device comprising a cover member of rectangular box-like shape which will fit over the ignition lock on the steering column of a vehicle and having as part of the cover member a cylindrical heavy stainless steel cylinder which completely covers and surrounds the vehicle ignition switch. Two leg portions on the box-like member extend past the steering column and receive on the other side thereof a solid steel bar through appropriate apertures provided in the leg members. One of the leg members has a covered steel cylinder member which contains a cylindrical lock with arm member for engagement with an one end of the steel bar through a slot therein. The entire device preferably is made of saw and drill resistant stainless steel material and the cylindrical lock is of the pickproof type. The cylindrical lock is designed so that the key is non-removable from same except when the lock is in the locked position.

Abstract: A bank lock for the ignition lock on the steering column of a motor vehicle includes a pair of arcuate arms which are hingedly connected at one end thereof and are of sufficient length to encircle a substantial segment of a steering column. A yoke element is carried by one of the arcuate arms and is adapted to be juxtaposed in close overlying relation to the housing of an ignition lock which protrudes from the steering column. One of the arcuate arms terminates in an end extension adapted to be positioned across the keyhole opening of the ignition lock and carries one of a pair of locking elements at its outer extremity. The second of the arcuate arms terminates in an end extension which is directed substantially perpendicularly to the end extension of the first arm and is adapted to be positioned in close relation to a diametrically opposed location of the ignition lock housing from the yoke.

Abstract: A steering column is pivotally fastened to a support structure and pivots between an operating position and a transmission locking position. A steering wheel is rotatably supported at the upper end of the steering column while a transmission shift lever is fastened at one side of the steering column and shiftable between a forward speed position, a neutral position and a reverse speed position. A latching mechanism is carried by the steering column and is engageable with one of a plurality of notches formed in a positioning rack secured to the support structure for latching the steering column in the transmission locking position and engageable with another of the notches for latching the steering column in the operating position. A transmission locking member is secured to the support structure and extends towards the transmission shift lever for abutment therewith when the steering column is in the transmission locking position for locking the transmission shift lever in the neutral position.

Abstract: A shackle for preventing tampering with the ignition lock on an automotive steering column comprises a collar and a cap. The collar envelops the steering column and has a gap at the ignition lock. The cap selectively is locked to the collar over the ignition lock or is freed to provide access to the ignition lock through the gap.

Abstract: A locking unit for immobilizing road vehicles to prevent their unauthorized removal comprises a sealed body which houses a movable locking member projecting from the housing and adapted for connection with a brake or clutch operating foot pedal or hand lever or with the control valve of an air-powered parking brake system. The sealed body also houses a key-released lock of the rotary barrel type having its plunger movable into locking engagement with the locking member manually without use of the key. The locking member may be a ratchet wheel engageable by a pawl which is pushed into engagement by the lock plunger acting on a spring. Further springs ensure the pawl being held clear of the wheel when the lock plunger is withdrawn. A modified form of the unit has a fixed jaw and a movable jaw by which the unit can be clamped around the stem of the draw-pin of a trailer vehicle and locked without using the key, thereby to prevent the hitch of a tractor from being coupled thereto.

Abstract: A shackle is provided with a hollow base portion and a pair of brackets projecting from the base portion. The hollow base portion fits over the ignition switch mounted on a steering post of an automobile and is secured in place by a chain having an end secured to each of the brackets. A bolt having an enlarged head mounts one of the ends of the chain to one of the brackets via a nut welded to the inner surface of the bracket so that the chain is adjustable in length to fit variously-sized steering posts.

Abstract: A locking mechanism for locking menbers, such as slidable or swingable closures, to another, usually stationary, member in closed position in which a bracket on the stationary member is engageable by a hook on the closure member to latch the members together while actuation of the hook into a position of disengagement from the bracket to unlock the members from each other is accomplished by a key operated push lock mechanism.