Abstract: An improved gas burner comprising in combination means for controlled feeding and subsequent admixing of a secondary air directly to the base of the flame in a form of a cap coaxially surrounding a burner head of the gas burner comprising a lateral apertures for issuing combustible air-gas mixture to form a flame. The through lateral openings of the predetermined size having the total cross section greater than the total cross-section of the apertures of burner head are performed on the side wall surface of the cap. During the operation of the gas burner the exact measured amount of the secondary air is admixed directly to the base of the flame, thereby highly efficient and complete combustion process characterized by high-elevated temperature is achieved.

Abstract: An anti-theft device for a motor vehicle comprises in combination a blocking member, e.g., a butterfly damper, rotationally disposed within an internal space of an exhaust pipe to control an exhaust gas flow, reduction gear for rotation the blocking member from opened to closed position and in reverse direction, an electrical control switch and a mechanical switch for actuating and de-actuating device. The blocking member, when is in closed position, shuts off the exhaust gas flow from an engine of the vehicle and consequently disables the engine, thereby preventing an unauthorized operation of the vehicle.