Abstract: An internal combustion engine of the rotary type has a pair of connected pistons and provides increased power and fuel economy. The fuel combustion chamber includes a single-acting air inlet valve and a double-acting outlet valve. The oil cooling system delivers air through each of the pistons whereby the oil is recirculated after cooling.

Abstract: A method and apparatus for controlling the shape of a hot railroad rail during accelerated cooling of the rail head. The railroad rail is cooled along its web-base junction at a rate which achieves a pre-selected degree of shape control, while avoiding over-cooling of the upper portion of the web or the tips of the rail base. The apparatus comprises spray means for applying selected volumes of coolant to the web-base junction of the rail oriented about the periphery of the rail. Such apparatus may be used to shape a rail during the accelerated cooling thereof in line with a rolling mill.

Abstract: A method and apparatus for forming pellets from wood particulate material: The apparatus comprises one or more parallel aligned, elongated dies formed by first and second aligned and mating continuous belts comprising a plurality of pads linked together. At least one of the belts has pads that contains a plurality of parallel longitudinal grooves in their free surface and the pads of the other belt are confrontingly aligned with the free surface of the pads of the first-mentioned continuous belt, to form the elongated dies. The wood particulate material, containing from 12 to 20% water, is cut, compacted, extruded and autogenously heated in the elongated dies by simultaneously rotating one of the belts counterclockwise and the other belt clockwise at respectively rotational speeds such that the linear speed of one of the belts is greater than the linear speed of the other.