Abstract: A combustion chamber is disposed below the water container of a water heater and formed at least partially by a shell. A burner disposed within the combustion chamber and a fuel supply line is connected to the burner. A valve associated with the fuel supply line. A combustion chamber sensor is disposed within the combustion chamber and adapted to sense a rise in temperature indicative of an abnormality in the combustion chamber. A circuit connected to the sensor and the valve such that the circuit triggers the valve to shut off fuel to the burner in response to a sensed temperature by the sensor.

Abstract: A combustion chamber is disposed below the water container of a water heater and formed at least partially by a shell. A burner disposed within the combustion chamber and a fuel supply line is connected to the burner. A valve associated with the fuel supply line. A combustion chamber sensor is disposed within the combustion chamber and adapted to sense a rise in temperature indicative of an abnormality in the combustion chamber. A circuit connected to the sensor and the valve such that the circuit triggers the valve to shut off fuel to the burner in response to a sensed temperature by the sensor.

Abstract: A sensor for detecting the flame occurring during a flashback condition in the fuel nozzle of a lean premix combustion system is presented. The sensor comprises an electrically isolated flashback detection electrode and a guard electrode, both of which generate electrical fields extending to the walls of the combustion chamber and to the walls of the fuel nozzle. The sensor is positioned on the fuel nozzle center body at a location proximate the entrance to the combustion chamber of the gas turbine combustion system. The sensor provides 360° detection of a flashback inside the fuel nozzle, by detecting the current conducted by the flame within a time frame that will prevent damage to the gas turbine combustion system caused by the flashback condition.

Abstract: The disclosed invention is directed toward an improved airspring bumper (20) and an airspring (10) comprising the improved bumper (20). The bumper (20) is defined by a dual reinforcing structure comprising concentric sets of ribs (50, 58) for absorbing and distributing loads generated from contact between the bumper (20) and an opposing retainer (16). The bumper (20) is secured to one of the airspring retainers (18) by a compression fit between the retainer (18) and the bumper (20) or by a central barbed post (36).

Abstract: An air spring assembly having a flexible member and moveable piston is provided. A bead surface of the flexible member is secured into a channel in the moveable piston to create an air-tight seal which can withstand tensile stress. The hollow piston increases the volume of the air reservoir which contributes to a reduction in the spring rate.