Abstract: A rotor assembly for a turbine includes a substantially enclosed, cylindrical outer housing that is shaped to define an interior cavity into which a rotor is disposed. The rotor includes a main rotatable shaft in coaxial alignment with the outer housing and a plurality of pivotable blades, each blade being connected to the shaft by upper and lower spokes. In use, fluid flow enters into the interior cavity through a selectively enclosable inlet port in the outer housing, applies force to blades within the primary fluid flow path which causes the main shaft to rotate, and exits the interior cavity though a selectively enclosable outlet port in the outer housing. As the main shaft rotates within the outer housing, a control mechanism maintains each blade in a position of limited resistance when located outside the primary fluid flow path in order to maximize efficiency.

Abstract: A rotor assembly for a turbine includes a substantially enclosed, cylindrical outer housing that is shaped to define an interior cavity into which a rotor is disposed. The rotor includes a main rotatable shaft in coaxial alignment with the outer housing and a plurality of pivotable blades, each blade being connected to the shaft by upper and lower spokes. In use, fluid flow enters into the interior cavity through a selectively enclosable inlet port in the outer housing, applies force to blades within the primary fluid flow path which causes the main shaft to rotate, and exits the interior cavity though a selectively enclosable outlet port in the outer housing. As the main shaft rotates within the outer housing, a control mechanism maintains each blade in a position of limited resistance when located outside the primary fluid flow path in order to maximize efficiency.

Abstract: An improved air horn is provided which includes a housing having an inlet for receiving a pressure medium to operate the horn and an outlet for the pressure medium. A first chamber is disposed between the inlet and outlet and receives the pressure medium from the inlet. A conventional sound-emitting horn is connected to the housing for receiving the pressure medium from the outlet, with the horn having a predetermined frequency. A closed resonating tube is connected to the other side of the housing, and a diaphragm is disposed between the first chamber and the resonating tube for oscillating movement in response to pressure changes in the first chamber and the resonating tube. A relatively small diaphragm having a natural frequency higher than the horn frequency is selected, as it is more economical and requires less energy to vibrate it.