Abstract: This application pertains to reciprocating piston engines supplied hot pressure fluid medium by combustion products pressure generators and controls thereof.This invention pertains to a new improved electro magnetic operated automatic, reversible cut off system for the pressure fluid medium admission valves to the power cylinders of reciprocating piston engines. To control the power and speed thereof. Controlled by speed governor or manual means.This invention pertains to a new improved electro magnetic operated automatic cut off system for the pressure fluid medium admission valves to the high pressure power cylinders of a reciprocating piston engine. Used as a pressure reducing means controlled by the pressure on the exhaust to the low pressure cylinders. This means is especially suitable where the pressure of the fluid medium varies widely.A combination of the two above described cut off control systems used together on a multi cylinder reciprocating piston engine.

Abstract: This invention comprises improvements in combustion products pressure generators of the intermittent cycle, two stage type and reciprocating piston engines which use the combustion products the pressure generators produce for power to drive compressors which supply combustion air to the pressure generators. Improvements of the pressure generators include an improved type burner with forced air circulation and dilution of the hot gases with cooler air making for minimum air pollution.Improvements in the mechanical seal on the fan shaft. Improvements in the means to drive the fan which include a pressurized cooled motor housing and improved drive shaft. Improved insulation, burner and fan construction. Improved fuel to air ratio and temperature controls, fuel cutoff on ignition failure. Improved cycle which operates the combustion products generators in multiples of three on a stop and go cycle which produces just the amount of hot fluid medium required by the prime mover.