Abstract: A cable support assembly for the electrical cables between sealed electrical penetration assemblies within a reactor penetration nozzle has been detailed. The cable support assembly is anchored at one end and slidably movable at the other end to provide for seismic and thermal movement. The cable support assembly includes conduits for protecting and shielding the cables which are disposed within the conduits.

Abstract: An improved response gamma sensitive self-powered detector is provided by forming the conductive central emitter as a tubular member. Low density, non-attenuating insulating means is disposed within the tubular emitter and about the tubular emitter spacing it from the coaxial outer conductive collector.

Abstract: A self-powered radiation detector of improved sensitivity is provided by having a tubular emitter electrode, with an inner collector electrode coaxial within the tubular emitter and insulated therefrom, and an outer tubular collector electrode coaxial about and insulated from the tubular emitter. The inner and outer collector electrodes are electrically connected.

Abstract: A low voltage, high continuous current dc vacuum switch has at least three internal contacts, including an electrically floating center contact and two movable end contacts. The multiple contacts provide electrically serial multiple arc paths so that the switch is operable to interrupt an arc at a dc arc voltage above the arc voltages at which an arc could otherwise be interrupted for a single arc path. Arc shield means are provided to prevent deposition of contact material on predetermined switch envelope internal surfaces.

Abstract: An optical viewing port assembly for a miniature TV camera, which hermetically seals the camera housing. The optical viewing port assembly includes a camera field of view reducing optical plug and high power light sources symmetrically disposed about this optical plug outside the camera field of view.

Abstract: An improved low voltage, high current D.C. vacuum switch is provided by disposing an arcing shield annularly about the arcing contact area within the vacuum switch. The arcing shield prevents disposition of conductive contact material on the insulator body wall of the switch and also shields the flexible corrugated annular member which permits switch contact movement to open and close the switch. The arcing shield may be floating electrically, or connected to the electrically positive side of the switch contacts.

Abstract: An improved low voltage vacuum switch is detailed which is operable to interrupt high D.C. continuous currents at voltages below the arc potential. An improved arc shield is provided which ensures that the switch can withstand significant D.C. overvoltages across the contacts when the switch is in the open position, even after repeated switch operation. The arc shield means comprises spaced-apart generally conic shield extending in parallel relationship from opposed ends of the switch with substantial overlap of the conic shields. These conic shields are disposed at an angle relative to the switch axis and minimize the chance for vaporized contact material to reach and condense upon the switch insulator body portion.

Abstract: A low voltage vacuum switch and operating mechanism is detailed which is readily used as a shorting switch arrangement in electrolytic cells between the high current carrying bus bars of the cell. The switch has a very low profile and axial contact travel distance and is opened and closed by a means which translates rotational motion to a generally axial contact movement via a cam and connecting member, with overtravel dished washer spring means provided to keep the contacts closed until a positive opening force is applied. The low voltage vacuum shorting switch is detailed with axially movable non-weld contacts. The switch has a compact, rugged design for use in low voltage, high current severe environment application. A pair of thin flexible annular members having annular corrugations formed therein permit axial movement of the contacts.

Abstract: A cathode ray tube is described having a high brightness, high resolution cathodoluminescence screen which exhibits a low noise level. Two discrete phosphor layers are provided on the interior of the tube faceplate. A thin electrophoretically deposited first phosphor layer of very finely divided phosphor is disposed upon the interior surface of the tube faceplate. A second gravity settle phosphor layer is disposed over the first phosphor layer.

Abstract: An improved compensated self-powered neutron detector is detailed wherein a thin conductive layer of low neutron cross section, high density material is disposed about the emitter core and also on the interior of the collector sheath. The conductive layer about the emitter absorbs low average energy electrons produced by emitter material activation products. The provision of the inner and outer conductive shield layers insures that signal current due to the response of these shielding layers to external gamma rays will be nullified and the detector device compensated to provide a detector which primarily responds to neutrons.

Abstract: A vacuum interrupter contact is formed of copper and chromium which exhibits high electrical conductivity and a high density of greater than about 95% of the theoretical density of the materials. The copper is the predominant constituent, and a mixture of copper and chromium powder is cold-pressed to form a compact which is then vacuum-sintered at a temperature below the melting point of the copper to achieve the desired high density.

Abstract: A cathode ray display tube is provided with a contrast enhancement panel which is optically coupled to the tube faceplate. The contrast enhancement panel has a viewing surface which is spherical and concave with respect to a viewer.

Abstract: A liquid level sensor of the bifilar wound inductive coil type is provided with improved end linearity characteristic. The coil ends are wound substantially to the end of a tubular support member, and a modified end support is provided at the support tube ends.

Abstract: A high contrast cathode ray display tube is provided by using a color filter glass faceplate for the tube which has a narrow band of transmissivity which closely matches the display phosphor emission.

Abstract: This invention relates to electron image devices for focusing an electron image derived from a photocathode element onto a target element with a substantially planar surface. More specifically, the photocathode element has an electron emitting surface of a substantially spherical configuration, a cylindrical electrode disposed around the axis of this device and having a diameter of a magnitude in the approximate range of 2.0 to 2.2 times the length of the radius of the photocathode element, an anode element having an aperture therein with a diameter of a magnitude not less than 0.3 nor more than 0.5 times the length of the photocathode radius, and a conical portion extending from the aperture at an angle of approximately 45.degree. with respect to the axis of this device.

Abstract: A modularized information display panel is formed of identical modules which have thin film transistor control elements disposed at display elements which are in an X-Y array upon the module substrate. The display medium driving electrode portion of the thin film circuit which is associated with each display element is non-symmetrically spaced relative to a unit display element, but the display element electrode is symmetrically positioned relative to the center of symmetry of the individual modules which make up the panel. In this way abutted display modules which form the display panel have display element arrays which are symmetrically aligned in the X-Y directions while the interconnecting X-Y buses of the abutted modules are offset.

Abstract: An improved electroluminescent display panel having an X-Y array of display elements upon a planar insulating substrate. Integral thin film transistor circuit elements and drive signal buses are interconnected on the panel with individual electroluminescent electrodes covering a large area of the panel to increase the active display area. The electroluminescent electrode is a multilevel electrode with a first level portion disposed on the insulated substrate, a second level electrode portion disposed over an insulative polymerized layer which covers the thin film circuit areas and the drive signal buses, and a connecting electrode portion which extends between the first and second level electrode portions.

Abstract: A vacuum circuit interrupter contact being generally cup-shaped with a radially inward extending lip with slots formed through the lip and side wall for directing current flow and including a flat annular contact cap attached directly to the lip portion. The annular contact cap extends from the side walls radially inward to a position inside of the lip-shaped portion. At the inner diameter of the annular contact cap an arcing ring is formed which extends downward along the inner diameter of the lip portion. The annular contact cap can be formed from a material having good arc interrupting properties, such as chromium copper, while the rest of the contact can be formed from a material which is easy to fabricate and has good electrical conductivity properties, such as copper. In another embodiment of the invention, the lip portion and the annular contact cap are formed as one member but any slots formed in the lip-shaped portion do not extend to the contact making surface.

Abstract: A self-powered in-core neutron detector assembly in which a plurality of longitudinally extending self-powered detectors have neutron responsive active portions spaced along a longitudinal path. A low neutron absorptive extension extends from the active portions of the spaced active portions of the detectors in symmetrical longitudinal relationship with the spaced active detector portions of each succeeding detector. The detector extension terminates with the detector assembly to provide a uniform perturbation characteristic over the entire assembly length.

Abstract: A large area integrated solid-state flat panel display is detailed in which thin film transistor addressing and drive circuitry is provided at each individual picture point with a display medium. The preferred display medium is an electroluminescent phosphor layer. An insulating layer of laminated photoresist is disposed over all electrical circuit elements except the electroluminescent drive electrodes.