Abstract: A rotary type engine is modified to be used as an air compressor and the air compressor is employed in an air cooling system. In the air cooling system, the air compressor supplies compressed air to a heat exchanger which reduces the temperature of the compressed air. The cooled compressed air is allowed to expand and cool within an expansion cavity of the compressor, and the rotation of the compressor forces the cooled air to emerge from an exit port in the compressor.

Abstract: A swimming pool touch pad seats on a swimming pool wall and is adapted to close an external electric circuit when contacted by a swimmer. The pad includes a nonconductive baseplate adapted to be mounted on a swimming pool wall. A normally nonconductive generally planar pressure sensitive elastomeric pad is seated on the baseplate and is adapted to become selectively conductive through the pad from the front to the rear surface upon application of pressure by a swimmer. When conductive it will provide an electrical current path in the area of pressure application. Electrodes secured to the front and rear surfaces of the elastomeric pad and insulated conductors connected between the electrodes and the external circuit complete the electrical path from the elastomeric pad to the external circuit. A nonconductive waterproof flexible cover member is secured to the baseplate and covers the elastomeric pad with the insulated conductors passing through the cover member.