Abstract: An improved reflector layer is provided utilizing a titanium dioxide (TiO.sub.2) admixture containing up to approximately 15 percent by weight alumina (Al.sub.2 O.sub.3) or zirconia (ZrO.sub.2). Said reflector layer underlies the phosphor layer, and an aluminum oxide (Al.sub.2 O.sub.3) layer can be deposited upon the phosphor layer.

Abstract: An improved reflector layer is provided utilizing a titanium dioxide (TiO.sub.2) admixture containing up to approximately 15 percent by weight magnesia (MgO). Said reflector layer underlies the phosphor layer, and an aluminum oxide (Al.sub.2 O.sub.3) layer can be deposited upon the phosphor layer.

Abstract: The invention relates to a low pressure sodium vapor discharge lamp for generating a directed light beam in which the lamp is provided with a cylindrical discharge tube which is enveloped by a cylindrical outer bulb.According to the invention the inside of the outer bulb is provided, in a cross-section of the lamp over at least 270.degree. of arc, with a reflecting layer which has a large reflection factor for sodium light and a very small reflection factor for infra-red radiation.The lamp according to the invention may for example be used in an exposure apparatus for photocopying texts and figures.

Abstract: A spark plug connector for use in ignition systems of internal combustion engines, said connector having a spark gap component in which two double offset or stepped configuration electrodes are disposed facing each other in a gas-tight discharge tube, said electrodes being electrically insulated and spaced from each other to define a discharge gap therebetween.

Abstract: A device for coherent optical and infrared second harmonic generation comprising an active laser element, a cavity Q-switched to the fundamental frequency of the active laser element, thereby ensuring formation of a zone of intersection of the fundamental frequency beams, and a nonlinear crystal placed inside the fundamental frequency cavity in the fundamental frequency beams intersection zone, said crystal generating the second harmonic under noncollinear synchronism conditions and transparent for both the fundamental frequency and second harmonic. The proposed device permits second harmonic generation under non-collinear synchronism conditions in a nonlinear crystal. This allows a spectroscopically pure second harmonic to be obtained and widens the field of nonlinear crystals application.

Abstract: A measuring cell for measuring electrical conductivity of liquids having a bore which in operation is contacted by a liquid, the conductivity of which is to be measured and a plurality of electrodes spaced along the bore and forming part of the bore surface, the electrodes being of coaxial annular form and including a first and a fourth electrode which constitute current electrodes for connection to a controllable AC current supply, a second and third electrode between the current electrodes and constituting voltage electrodes for connection to a high input impedance amplifier provided with means for employing the amplifier output to control the AC current supply to maintain sensibly constant the voltage at the voltage electrodes and a fifth electrode of annular form coaxial with the first to fourth electrodes and for connection to the first electrode by way of a buffer amplifier presenting a high impedance to the first electrode and a low impedance to the fifth electrode and located on the side of the first

Abstract: A method and apparatus for use in detecting non-parallel reed switch contacts, comprising digital circuitry for measuring the durations of contact bounces (open contact states) after the initial operation or closure of the reed switch contacts and a comparator stage; the output of the digital measuring circuitry is applied to the comparator stage which determines if the duration of any contact bounce is greater than or less than a digitally programmed reference number corresponding to a duration for an acceptable reed switch. Reed switch operating circuitry is also provided to operate and deactuate the reed switch contacts for a predetermined number of test cycles.

Abstract: An electrometer for conventional pocket radiation dosimeters is disclosed in which the moving element of the electrometer is a carbon fiber. The fiber is spun from polyacrylonitrile homopolymer yarn and has a diameter of approximately 7 microns before carbonization. The polyacrylonitrile homopolymer fiber is conventionally preoxidized at approximately 270.degree. C before conventional carbonization at approximately 1200.degree. C. The resulting working fiber has a round cross sectional diameter of approximately 4 microns and a modulus of elasticity of approximately 15,000,000 psi. The fiber is mounted in a conventionally loop shaped electrometer frame by crimping the ends of the fiber into tabs on the frame.

Abstract: An alternating current meter circuit includes a feedback network coupled between a high input impedance field-effect transistor amplifier circuit and a detection circuit providing high input impedance, gain stability, linearity and precision.

Abstract: A novel structural combination for use in gas discharge panels for generating alpha-numeric and video images which exhibit a high level of brightness, even in panels scanned in a point-at-a-time mode and at television scan rates. The combination includes row-wise extending hollow cathodes comprising upper and lower metal cathode plates between which a hollow cathode discharge is generated. The spacing between cathode plates is selected to insure that an efficient hollow cathode discharge is created. Situated forward of the hollow cathodes are a first electrontransmissive grid means for extracting electrons from the hollow cathode dischage, a second electron-transmissive grid means for controlling the flow of electrons through the first and second grid means, and a faceplate having a phosphor coating thereon and adapted to receive an energizing potential for accelerating toward the phosphor coating those electrons which pass through the second grid means.

Abstract: A metal vapor arc lamp comprises an alumina ceramic arc tube having an end sealed by an apertured ceramic plug. A metal lead wire extending through the aperture is sealed therein, and supports an electrode within the arc tube. Thermal isolation of the lead wire seal from the electrode is necessary and is achieved by providing a loop in the supporting conductor intervening between the electrode and the lead wire seal region.

Abstract: A portable device for measuring the conductivity of a liquid between two probes spaced relative to each other along the lateral axis of a container. The gains of a plurality of operational amplifiers are varied for range, by conductivity and by temperature variations to provide a signal representative of the conductivity of the liquid. An oscillator using two operational amplifiers is used to drive the measuring amplifier.

Abstract: An AC drive discharge type display apparatus which includes a display panel having groups of transverse electrodes and vertical electrodes which are positioned in cross form with a gap therebetween and having cross points which are made luminescent by applying an AC sustaining drive voltage, a turn-on signal and a turn-off signal.

Abstract: A planar plasma discharge shift register includes a plurality of electrodes of a first polarity and a unitary electrode of the opposite polarity. Multi-phase clock signals applied in succession to each of the pluralities of electrodes cause a plasma discharge, once initiated, to propagate in controlled fashion along a path prescribed by the location of the electrodes. By suitable shaping of the electrodes, and through a judicious choice of clock signals, it is possible to propagate a gaseous discharge bi-directionally.

Abstract: A sensor assembly for a halogen gas leak detector characterized by including a tubular, porous, high purity Alumina (Al.sub.2 O.sub.3) element for supporting electrode and heater components in spaced-apart relationship relative to one another and a surrounding housing. The porous Alumina element is doped with an alkali metal by methods that cause the alkali metal to be distributed throughout the porous Alumina structure. The assembly is further characterized by incorporating a ribbon-like heater coil helically wound around the tubular Alumina element. In one embodiment of the invention the Alumina element is provided with a stepped end structure that effectively insulates the ends of an electrode mounted within the tubular element from the surrounding housing.

Abstract: This invention relates to a system for measuring in real time, by auto-correlation, the period and frequency of a periodic biomedical source signal with random components such as an ultrasound doppler fetal heart beat signal.Before and during delivery of a fetus, the invention enables an obstetrician to continuously monitor and record the heart rate of the fetus in real time.

Abstract: Outer molybdenum current conductors of electric lamps having quartz glass lamp envelopes and pinched seals have a corrosion-resistant metal coating. The current conductors have been ground bare at the end which is welded to a molybdenum foil incorporated in the pinched seal.As a result of this it is achieved that the current conductors do not corrode, that the welding electrode upon making the connection to the foil does not stick to the coating, and that upon making the pinched seal the electric contact between the foil and the current conductor is not interrupted.

Abstract: A metal halide high-intensity arc discharge lamp having a bulb containing elongated electrodes of a refractory metal such as tungsten, and means connecting the electrodes through seals of the bulb to external terminals. Cooling means such as metal fins are provided at the external terminals and function to cool the electrodes relatively quickly whenever the arc discharge terminates, without substantially affecting the desired high operating temperature of the electrodes. The faster cooling of the electrodes upon termination of the arc discharge permits the lamp to be restarted sooner.

Abstract: A gas discharge display panel is disclosed for displaying images by selectively making luminescent cross points of main electrodes arranged to form the matrix through a discharge gap. The display includes a switching operation part which comprises auxiliary electrodes which are arranged in parallel to the main electrodes and to which a turn-on or turn-off pulse is applied and switching electrodes which cross the auxiliary electrodes to form the matrix through the discharge gap so as to select predetermined cross points of the auxiliary electrodes. The switching operation part is incorporated in the panel together with a display part comprising the main electrodes to form the matrix through the discharge gaps whereby switching circuits for switching each of the main electrodes which are complicated and expensive can be improved.

Abstract: A display device comprising a panel structure including a plurality of gas-filled cells and including, within the body of the panel, gas communication channels extending between selected cells to provide a selective flow of excited gaseous particles from certain cells to others to prime the receiving cells and thereby control the transfer of glow between the cells.