Abstract: In a valve in head two-cycle internal combustion engine, a slave piston and a power piston reciprocate in a pair of parallel cylinders. Valve opened and closed intake and exhaust ports respectively communicate with the slave piston and power piston cylinders. The engine head centrally contains a combustion chamber overlying a portion of both cylinders and communicating therewith through a valve opened and closed combustion inlet port and a combustion outlet port, respectively communicating with the slave cylinder and power cylinder so that a fuel rich mixture, when ignited in the combustion chamber, mixes with and burns air compressed in the power cylinder. An engine head supported rocker arm and shaft assembly, driven by a cam shaft, opens and closes the valves in sequence with the reciprocating pistons.

Abstract: An auxiliary condensing coil is interposed between the compressor and primary coil of a refrigerated air conditioner through a pressure sensor operative in response to excessive head pressure for energizing an auxiliary coil fan motor and sump pump. The auxiliary coil is cooled by ambient air and moisture.

Abstract: An upright generally cylindrical casing forms a gas passageway communicating with the exhaust of a flue for receiving its heated exhaust gases. A burner, axially mounted below the casing in the heated gas stream, heats the gases and refractory material contained by the casing to a combustion temperature. Baffles in the casing direct the heated gases toward refractory vanes contained by the casing. Additional air is admitted to the depending end of the casing to support combustion of unburned hydrocarbons.