Abstract: The present invention provides a security device for securing a spare tire and rim, retained by a winch mechanism, to the underside of an automobile. More specifically, the device includes a securing element that engages the rim and encloses a yoke of the winch mechanism to prevent a thief from severing the yoke and gaining access to the spare tire and rim. In a use position, the yoke extends through the primary opening in the rim and a fastener extends through a hole in the securing element and a secondary opening in the rim to connect the securing element to the rim, whereby the yoke is enclosed between the rim and the securing element.

Abstract: Disclosed is a security device to protect the spare tire on a vehicle from possible theft. The spare tire, especially in sport utility vehicles, is located on the rear underside of the vehicle and is secured by a cable and yoke. The security device comprises a plate or disk which is attached to the spare tire rim and prevents unauthorized access to cable and yoke, thereby minimizing the possibility of theft.

Abstract: Described is a system for measuring noxious gas concentration in an affected space and for controlling the device producing the noxious gas or for decreasing the concentration of the gas in the affected space. The invention is particularly described in relation to measuring carbon monoxide concentration in an automobile garage and for controlling the garage door opener circuit to open the garage door in response to a preselected concentration of carbon monoxide. Also described in particular is a system for deactivating a furnace operating circuit to turn off the furnace in the event of excessive carbon monoxide concentration.