Showing papers by "United States Department of Energy published in 1975"

Solar heating system

Abstract: Heating system comprises solar heating panel, black fluid, and structure for selectively circulating black fluid through heating panel. Panel includes enclosure having light-transmitting upper surface, and light-transmitting conduit is closely arranged in serpentine fashion within enclosure. Reflective surface is positioned under conduit arrangement. In use, black fluid circulating through conduit arrangement absorbs solar energy, and in non-use black fluid is drained from conduit arrangement whereby reflective surface functions to reflect rays of sun away from heating panel.

Cold cathode vacuum gauging system

Abstract: A vacuum gauging system of the cold cathode type is provided for measuring the pressure of a plurality of separate vacuum systems, such as in a gas centrifuge cascade. Each casing is fitted with a gauge tube assembly which communicates with the vacuum system in the centrifuge casing. Each gauge tube contains an anode which may be in the form of a slender rod or wire hoop and a cathode which may be formed by the wall of the gauge tube. The tube is provided with an insulated high voltage connector to the anode which has a terminal for external connection outside the vacuum casing. The tube extends from the casing so that a portable magnet assembly may be inserted about the tube to provide a magnetic field in the area between the anode and cathode necessary for pressure measurements in a cold cathode-type vacuum gauge arrangement. The portable magnetic assembly is provided with a connector which engages the external high voltage terminal for providing power to the anode within in the gauge tube. Measurement is made in the same manner as the prior cold cathode gauges in that the current through the anode to the cathode is measured as an indication of the pressure. By providing the portable magnetic assembly, a considerable savings in cost, installation, and maintenance of vacuum gauges for pressure measurement in a gas centrifuge cascade is realizable.