Abstract: A rotary internal combustion engine includes a block having a generally elliptically shaped bore and a substantially round rotor adapted to rotate on a straight shaft in the bore of the block. The rotor is provided with a pair of substantially diametrically mounted rotor segments, the rotor being provided with a pair of recesses for receiving the rotor segments and the rotor segments being pivotally mounted to the rotor such that a portion of each rotor segment tends to be forced outwardly by centrifugal force upon the rotation of the rotor. The block is provided with a charging and a combustion space formed in the space between the elliptical shaped bore and the round rotor. The combustion chamber is enlarged by the outward movement of an outer segment pivotally mounted on the block. A pair of vanes between the rotor segments are mounted in slots on the rotor for the forming of a seal between the rotor and the inner surface of the bore of the block. The engine may be operated on any type of gaseous fuel.

Abstract: A rotary internal combustion engine includes a block having a generally elliptically shaped bore and a substantially round rotor adapted to rotate on a straight shaft in the bore of the block. The rotor is provided with a pair of substantially diametrically mounted rotor segments, the rotor being provided with a pair of recesses for receiving the rotor segments and the rotor segments being pivotally mounted to the rotor such that a portion of each rotor segments tends to be forced outwardly by centrifugal force upon the rotation of the rotor. The block is provided with a charging and a combustion space formed in the space between the elliptical shaped bore and the round rotor. The combustion chamber is enlarged by the outward movement of an outer segment pivotally mounted on the block. A pair of vanes between the rotor segments are mounted in slots on the rotor for the forming of a seal between the rotor and the inner surface of the bore of the block. The engine may be operated on any type of gaseous fuel.

Abstract: An apparatus for the production of frames for filters from a continuing reel of framestock, each frame having a given length and width determined by a preset cutting and corner notching function and each frame having a prefolded cross section or a pinched cross section, said frames made to accommodate filter material of the type normally used to filter air.