Abstract: A method and apparatus is provided for operating a self-cleaning oven in which a gas sensor, such as for measuring concentrations of CO gas, is located remote from, yet in gas communication with, an exhaust flue of the oven. The gas sensor is located at the end of an outlet tube which extends from the exhaust flue. A sample gas flow is provided to the gas sensor through the outlet tube to isolate the sensor from the heat of the oven and a filter device is located in the outlet tube for filtering the sample gas flow. A valve may be provided at the inlet to the outlet tube. The rate of change (slope) of successive readings of gas concentrations may be used to determine when the combustion of food material is complete, in order to terminate a self-cleaning cycle.

Abstract: A method and apparatus is provided for operating a self-cleaning oven in which a gas sensor, such as for measuring concentrations of CO gas, is located remote from, yet in gas communication with, an exhaust flue of the oven. The gas sensor is located at the end of an outlet tube which extends from the exhaust flue. A sample gas flow is provided to the gas sensor through the outlet tube to isolate the sensor from the heat of the oven and a filter device is located in the outlet tube for filtering the sample gas flow. A valve may be provided at the inlet to the outlet tube. The rate of change (slope) of successive readings of gas concentrations may be used to determine when the combustion of food material is complete, in order to terminate a self-cleaning cycle.

Abstract: An improvement to conventional atmospheric gas burners particularly advantageously applied to the type used as surface heating units in gas cooking appliances such as ranges and cooktops, which typically comprise a burner head having a plurality of primary burner ports formed at port locations equally spaced about the periphery of the burner head. Improvement is realized by not forming primary burner ports at selected ones of the equally spaced port locations. The unused port locations are selected so as to separate the primary ports into groups. The reduction in the number of ports reduces the total port area thereby reducing the amount of primary air entrained in the air/gas mixture delivered to the burner. In addition the resulting spacing of the groups of ports has the effect of reducing the amount of secondary air per port relative to that which would be entrained by the same number of ports, if equally distributed about the periphery.

Abstract: In a gas burner assembly, the gas burners are equipped with a device constructed of a thermostatic, bimetallic material which autoregulates the amount of primary air that can be entrained into the burner such that the likelihood of an occurrence of lifting or flashback is substantially reduced, and elevated CO emissions at reduced firing rates are eliminated.

Abstract: A pulse combustion powered apparatus is disclosed for temperature conditioning and pressurizing fluids. The alternating periods of positive and negative pressure of the combustion gases of a pulse combustion burner drive a reciprocating compressor and the rejected engine heat is recovered by heat exchange with a primary fluid. The compressor may be included in a reversible refrigeration circuit to provide heating and cooling of secondary fluids.

Abstract: A pulse combustion powered apparatus is disclosed for temperature conditioning and pressurizing fluids. The alternating periods of positive and negative pressure of the combustion gases of a pulse combustion burner drive a reciprocating compressor and the rejected engine heat is recovered by heat exchange with a primary fluid. The compressor may be included in a reversible refrigeration circuit to provide heating and cooling of secondary fluids.