Abstract: The subject invention pertains to unique methods for producing articles with a polyurethane integral skin at low cost. The methods of the subject invention permit the production of highly detailed painted articles having an outer polyurethane layer and an inner polyurethane foam structure, wherein the outer layer is waterproof. The subject invention further pertains to the articles produced by the methods of the subject invention.

Abstract: A diaphragm failure monitoring system for detecting leakage in a diaphragm of a diaphragm pump. The system includes a pump having an operating chamber containing a working fluid and a pumping chamber for pumping material into and out of the pump and a diaphragm separating the operating and pumping chambers. A first optic fiber is joined to the operating chamber for transmitting an optic signal across the working fluid. A second optic fiber is joined to the operating chamber for receiving the optic signal from the first optic fiber. An electric signal establishing device establishes a first electrical signal when the optic signal from the first optic fiber to the second optic fiber passes through uncontaminated working fluid.

Abstract: The subject invention pertains to unique methods for producing strong, multiple-layer polyurethane articles at low cost. The methods of the subject invention permit the production of highly detailed painted articles having multiple layers of polyurethane which resist separation. The subject invention further pertains to the articles produced by the methods of the subject invention.

Abstract: A duplexer for a radio transceiver is disclosed in which two volumes of dielectric material each have at least two holes and each is covered with a conductive material except for one surface. An electrode on the one surface of each volume is coupled to one of the holes and is coupled to a substrate via a terminal passing through a mounting device. The substrate provides coupling between the terminals of the two volumes and a common antenna.

Abstract: A multiresonator dielectric block filter is disclosed in which capacitive coupling between resonators disposed in the dielectric block is controlled by an electrode strip coupled to the conductive material covering the majority of the dielectric block surface. The electrode strip extends at least partially between two adjacent resonators to control the capacitive coupling between the resonators.

Abstract: A multiresonator dielectric block filter is disclosed in which capacitive coupling between foreshortened resonators disposed in the dielectric block is controlled by an electrode strip coupled to the conductive material covering the majority of the dielectric block surface. The electrode strip extends at least partially between two adjacent resonators to control the capacitive coupling between the resonators.