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 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: An improved doorstop provides increased safety along with simplified operation over previous doorstops. The doorstop is adapted to be received in a floor mounted receptacle in close proximity to the door. The device includes a door contact member which pivots from a first position in contact with a fully closed door to a second position which permits the door to be opened a limited but finite distance. There is no need to remove the device from the floor receptacle to permit limited movement of the door, thus affording increased protection against forced entry. The improved doorstop is useful both on sliding doors as well as hinged doors. Several alternative embodiments of the improved doorstop are shown and described. When used with a hinged wooden door, the doorstop optionally includes the use of a rigid plate which may be affixed to the door to protect the door from damage by the device and to distribute force exerted against the door over a larger surface area.

Abstract: A device is provided for locking a compartment lid such as the hood of a motor vehicle. The device comprises an element adapted to sit on a portion of the hood and a portion of an adjacent fender surface, a strap attached to the element and extending through a gap between the hood and fender into the compartment interior, a hook on the strap to attach the strap to the vehicle in the compartment, and a mechanism such as a reel to remove slack from the strap and hold the element securely against the hood and adjacent fender surface.