Abstract: A rotary machine includes a housing divided into a first stationary portion and a second rotational portion. The second rotational portion is supported for rotation with respect to the stationary portion about an axis of the housing. The first and second portions of the housing cooperate to define a generally toroidal passage which is coaxial with the housing axis. A first piston and a second piston are disposed in the passage. Each piston has an interconnection mechanism for selectively interconnecting the piston to either the stationary portion or the rotational portion.

Abstract: An improved nozzle-mixing burner apparatus is disclosed. Combustion air pressure is sensed at a control which is connected to a drive rod. Movement of the drive rod opens or closes fuel and air nozzle valves to maintain the ratio of combustion air and fuel over a wide range of flow rate.

Abstract: A method and apparatus for maintaining the flow rate of one or more secondary fluids proportional to the flow rate of a primary fluid is disclosed. A valve is located in a primary fluid line and a valve is located in a secondary fluid line. An actuator drives linkage to operate the valves in approximate proportion to one another. A sensor senses the fluid pressure in the primary line and the sensed pressure is delivered to each regulator in the secondary lines. The regulators adjust the static pressures of the secondary fluids downstream of the valves to the desired proportional level.