Abstract: A vehicular anti-theft device has a clamping member for clamping the tire of a vehicle under pressure to prevent rotation of the wheel of the vehicle on which the tire is mounted. An actuating device mounted on the vehicle and coupled to the clamping member selectively moves the clamping member onto the tire to clamp the tire and away from the tire to release the tire. A control mounted in the vehicle and coupled to the actuating device includes the ignition switch of the ignition system of the vehicle. The control controls the operation of the actuating device to clamp the tire when the ignition is turned OFF and releases the tire when the operator of the vehicle provides a predetermined code indication.

Abstract: This invention provides a safety arrangement for a dumping vehicle which may include a bumper movable to energize a brake actuator, the bumper being retractable upon tilting of the dumping bed. Modified bumper mounting arrangements are provided for various kinds of vehicles. A latching relay may be included to cause the brake actuator to hold the brakes locked, irrespective of disengagement of the obstruction. The bumper may include a pneumatic chamber with a flexible wall, with a pressure-operated switch for operating the brake actuator. Also, an exteriorly actuated switch may be used in a two-man operation in lieu of a bumper.