Abstract: Improved apparatus (10) for releasably securing a plurality of non-externally threaded ignition devices (12) in cylinder head bores (29) for facilitating the insertion and removal of the ignition devices therefrom, the apparatus (10) comprising means (20) defining a pair of slots (30) about each bore (29); a retaining member (22) for each ignition device (12) having a bearing surface (44) and a pair of projections (42) receivable in a pair of slots (30); and means for releasably securing the projections (42) in the slots (30) with the bearing surfaces (44) abutting the ignition devices (12) for urging them into their respective bores (29).

Abstract: A tamper-resistant steering column lock incorporating an improved combination lock is disclosed. The improved combination lock includes an array of discs, each having an electrically conductive member extending therethrough. The disc at one end of the array is connected to the active terminal of the vehicle's electrical system and the disc at the other end of the array is grounded. When the discs are rotated to align the electrically conductive members, a circuit is completed to a solenoid or the like which regulates movement of a locking bolt between its locked and unlocked positions.

Abstract: A frost-proof fire hydrant of the type wherein the valve is biased towards its open position by the fluid pressure in the shoe. The fire hydrant includes improved means disposed in the bonnet and cooperating with the valve stem for maintaining the valve in the closed position against the water pressure in the shoe.

Abstract: A frost-proof fire hydrant of the type wherein the valve is biased to its closed position by the fluid pressure in the shoe. The fire hydrant includes improved means disposed in the bonnet and cooperating with the valve stem for maintaining the valve in the closed position in the event of decreased water pressure in the shoe.