Abstract: A system for remotely disabling or enabling an automobile having at least one receiver that scans signal codes transmitted in frequencies dedicated to mobile telephone communications, and at least one frequency outside that used in mobile telephone communications. The signal codes received by the receiver are compared to an enabling code and a disabling code stored within a programmable memory. When the owner of an automobile finds the vehicle stolen, the owner dials the telephone number corresponding to the disabling code of the automobile. The dialed number causes a signal code to be transmitted from the mobile telephone transmitted network, wherein the signal code is received by the stolen automobile. If the transmitted signal code matches the programmed disabling code the automobile is disabled. Similarly, the automobile can be enabled if a signal code is received that matches the enabling code the automobile.

Abstract: An anti-theft vehicle system comprises a relay (R1) which shuts off power to an engine coil (14), fuel pump (16) or fuel flow valve (50) to prevent the engine from starting until the reset device in the form of a switch (S1) or a keyboard (150) is activated. Relay (R1) is controlled by a processor (100) which is coupled to a keyboard (150) so that when a code is keyed into the keyboard (150) the processor outputs a signal to the relay to cause the relay to supply power to the engine coil (14), fuel pump (16) or flow valve (50).

Abstract: An anti-theft arrangement for a motor vehicle comprising an electrically operable device associated with a system or component essential to operation of the engine of the vehicle and which in a first state permits normal operation of the associated system or component and which in a second state does not, and wherein the supply of electrical current to said device is controlled by combination or key-operated switching means and in which the arrangement is such that said electrically operable device is automatically placed in its state preventing normal operation of the engine upon disconnection of the device from a supply of electrical current.

Abstract: Electrovalves are opened in automobile piping of a brake line, a clutch line and a fuel line by a current through normally open contacts of a plurality of control relays and through normally closed contacts of an interlocking relay. The control relays are operated by selected switches of a plurality of push-button switches while the interlocking relay is operated by the non-selected switches of the plurality of switches. The control relays are interconnected so that the selected push-button switches must be operated in a selected sequence. All the relays have holding circuits.

Abstract: There is disclosed an anti-theft device for an internal combustion engine of a motor vehicle that has two features to prevent theft that come into operation upon activation of a single switch that can be hidden and is part of the overall ignition system in addition to the ignition switch. Activation of the single switch causes a three-way solenoid valve to divert gasoline from the fuel pump back to the fuel tank rather than to the carburetor and also causes a break in the ignition circuit between the ignition coil and the distributor.

Abstract: A safety device for a diesel engined vehicle comprises a key operated lock controlling starting and stopping of the engine and a steering wheel lock mechanism. The device is such that prevents the steering wheel from being locked while the engine is running.

Abstract: An anti-theft device having a pivoted lever, a cable connected to one end of the lever and controlling a fuel injection pump, the other end of the lever engaging a cam integral with the cylinder of a lock so that when the cylinder is turned by a key in the lock the cable controls the opening and closing of the fuel injection pump.

Abstract: A circuit for controlling the operability of an electrically-operated fuel system, for a vehicle, and particularly for controlling a fuel injection system. The circuitry includes a timing network and a concealed switch the position of which is only known to an authorized operator of the vehicle. When the concealed switch is closed by an authorized person an associated relay is energized and the timing network is inhibited which in turn maintains a main control relay in its enabling position permitting normal operation of the fuel system. In this authorized mode of operation the timing network is essentially maintained in a state where it is not permitted to time-out. When an unauthorized person gains entry to the vehicle, by-passing the ignition switch, the concealed switch is not closed, nor is the associated relay energized.

Abstract: A solenoid-operated valve is disposed in the fuel line of an automobile to interrupt the fuel flow to the carburetor when the solenoid is deenergized. The solenoid operated valve is maintained in its fuel-open position only when both the automobile ignition switch is closed and a supplementary concealed switch is closed. The circuitry for operating the valve may include either a relay or an electronic device. An indicator light is illuminated during the fuel-closed position of the solenoid operated valve as a reminder that both switches must be operated to permit vehicle movement.

Abstract: A steering lock assembly for preventing the burglary of diesel motor vehicles. The assembly includes an operating rod coupled to a fuel injection pump for de-activating the pump. The operating rod is axially movable in a guide sleeve and has a recess formed in the lower portion thereof. The assembly also includes a steering lock device actuated by a steering lock actuating device for preventing rotation of the steering shaft of a vehicle. The operating rod and steering lock actuating device are connected through a rocker arm and a wire attached to one end of the rocker arm so that when the operating rod is pulled to an engine stop position, the steering lock device is actuated by the steering lock actuating device to prevent rotation of said steering shaft.