Abstract: A cooling system for a sealed permanent magnet generator is disclosed that has a rotor shaft that is hollow. Permanent magnets mount on the exterior of the hollow rotor shaft. The rotor shaft has a pressed aluminum tube in various configuration on the inside bore with an end-mounted fan. The aluminum tube acts as a heat sink to draw the heat generated by the magnets through the rotor shaft and aluminum tube. The fan draws cooling air through the hollow bore of the rotor shaft thus cooling the magnets and forces the heated air through passages on the exterior of the stator housing. Because the airflow is not in contact with the electrical portions of the generator the cooling system will perform in dusty, wet and explosive environments. In another configuration a refrigeration compressor installed in the rotor shaft bore cools the rotor shaft and the fan cools the stator passages.

Abstract: A cooling system for a sealed permanent magnet generator is disclosed that has a rotor shaft that is hollow. Permanent magnets mount on the exterior of the hollow rotor shaft. The rotor shaft has a pressed aluminum tube in various configuration on the inside bore with an end-mounted fan. The aluminum tube acts as a heat sink to draw the heat generated by the magnets through the rotor shaft and aluminum tube. The fan draws cooling air through the hollow bore of the rotor shaft thus cooling the magnets and forces the heated air through passages on the exterior of the stator housing. Because the airflow is not in contact with the electrical portions of the generator the cooling system will perform in dusty, wet and explosive environments. In another configuration a refrigeration compressor installed in the rotor shaft bore cools the rotor shaft and the fan cools the stator passages.

Abstract: An abrasion-resistant article and method for making is disclosed. The article includes a plastic substrate and a gradational coating applied by plasma-enhanced chemical vapor deposition to the surface thereof.

Abstract: An abrasion-resistant article and method for making is disclosed. The article includes a plastic substrate and a gradational coating applied by plasma-enhanced chemical vapor deposition to the surface thereof.

Abstract: An abrasion-resistant article and method for making is disclosed. The article includes a polycarbonate substrate, an interfacial layer of an adherent resinous composition on the substrate, and an abrasion-resistant top layer applied on the interfacial layer by plasma-enhanced chemical vapor deposition.

Abstract: An ionic material is added to a halocarbon insulating fluid used to cool high voltage equipment in order to prevent the buildup of electrtostatically generated charge. The ionic additive allows leakage of charge from the insulating fluid so as to prevent dangerously high voltage buildup while at the same time withstanding the high voltage applied to the system.

Abstract: The pressure of a gas within an enclosure is measured without making physical contact with the gas by focusing radiation from a laser onto a section of the gas and, while varying the intensity of the radiation, monitoring the section under measurement for electrical breakdown, as indicated by emitted light or suitable breakdown indicia, such as radio noise. The absolute gas pressure at the section of the gas under measurement is determined from a calibration curve relating the intensity of the beam to the pressure at which breakdown occurs for the particular gas being monitored.

Abstract: In high voltage electrical equipment, improvement in the dielectric performance of an insulative conduit having a flow of liquid dielectric coolant therein is effected by providing a suitably selected low conductance path in contact with the dielectric coolant.