Abstract: In an electric incandescent lamp having a metal cap and centering ring, hook-like side flaps are forced out of the side walls of the cap and engage via the flaps of the centering ring in slots in the centering ring. The assembly is fixed together by spot-welding.

Abstract: A composite body consisting of two or more formed parts of densely sintered aluminum oxide and a metal such as an envelope for a mercury vapor discharge lamp with a metal halide filling. The parts are connected together with material which comprises at least two of the oxides SiO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 and at least one of the trivalent oxides La.sub.2 O.sub.3 and Y.sub.2 O.sub.3. This material is applied at a relatively low temperature and is resistant to the gas filling up to approximately 1350.degree. C.

Abstract: A semiconductor device including a substrate of first conductivity type provided with an epitaxial region of the opposite conductivity type. The base of a first vertical bipolar transistor is formed by a localized epitaxial layer present above the first region, the collector of the transistor and the base of a second vertical bipolar transistor adjoining each other in the region.

Abstract: An apparatus for drying and degassing oil, comprising a treatment tank; an oil circulation circuit including a pumping set, heating means, and spraying means; and a vacuum pump for bringing the oil in the tank under partial vacuum. The pumping set is arranged entirely within the treatment tank and is immersed in the oil. A spring-loaded mass of distributing elements is arranged in a distribution space opposite the spraying means.

Abstract: A three-dimensional, black-white or color television display device which is compatible for two-dimensional television. Located in front of the screen of a direct-view display tube is a removable strip or dot filter having alternatingly light-reflecting and light-dispersing strips or dots and light-transmissive, polarizing or light-selecting strips or areas. The display device is provided with a projection display tube which gives with three-dimensional display an image on the strip or dot filter via a polarizer or light-selecting filter. By means of spectacles having polarized glasses or light-selecting glasses an observer can observe a three-dimensional image.

Abstract: A compact plasma-MIG welding torch in which the contact tube and the nozzle are directly connected together electrically, thereby enabling welding with a very short extension of the welding wire.

Abstract: The sensitivity of photoconductive layers of tetragonal lead monoxide in a binder is increased when the tetragonal lead monoxide produced by prior art process after being subjected to a further treatment has a grain size of 1 to 50 .mu.m and is dispersed in the binder without mechanical force and is sedimented on a layer carrier without mechanical force.

Abstract: A magnetic reading head having a magneto-resistive element of the type in which the measuring current is forced to flow through the element at an angle with the easy axis of magnetization. For suppressing thermal noise (resistance variations under the influence of temperature fluctuations as a result of the contact of the element with a moving record carrier), the element is subjected to an auxiliary field parallel to the easy axis of magnetization, the direction of which is reversed at a frequency f.sub.s. The measuring current alternates at the same frequency in phase with the reversals of the auxiliary field. The output signal of the element is applied through a low-pass filter which cuts off signals of a frequency f.sub.s to a detection device.

Abstract: The target of a television camera tube comprises photoconductive material in the form of a regularly interrupted structure so that both the photoconductive material and parts of the signal electrode are accessible to the electron beam. The potential difference between the signal electrode and the cathode is adjusted so that during scanning, the signal electrode accepts a proportion of the beam current dependent on the local potential of the photoconductor surface, and the photoconductor is stabilized only during fly-back. The camera tube thus has an adjustable inherent amplification without increased inertia.

Abstract: Digital signal processing arrangement such as a digital filter for computing output signal samples which are each equal to the sum of products of a given plurality of pairs (for example N) of input signal samples. One of the input signal samples of the pair is, for example, formed each time by a sample x(n) of a digital signal to be filtered, the other input signal sample of the pair by a filter coefficient z(n), wherein either the sample x(n) or the filter coefficient z(n) can assume only a limited number of values 0, .+-.A.sub.1, .+-.A.sub.2, . . . .+-.A.sub.M, M being much smaller than N. In the case x(n) can assume only this limited number of values, z(n) is first multiplied, owing to the x(n) belonging to the pair, by the sign of x(n) for generating a product of the form z(n). sgn [x(n)]. In-dependent of the magnitude of n(n) this product is applied to an accumulator which corresponds with this magnitude of x(n).

Abstract: A ground proximity warning system used by aircraft when unsafe flight configurations defined by specified flight warning mode envelopes are detected. The invention provides that alarm generation signals are not immediately given, but instead the continuing flight of the aircraft is monitored by an alarm filtering system. The filtering system uses independently variable maximum and minimum threshold levels, and filtering constants which can be incremented and or decremented as functions of the flight location of the aircraft and the specific warning mode envelope for suppressing false or unnecessary alarm generation. The filtering parameters may be varied independently for each flight warning mode. In addition, a priority-ordered series of audio warnings are provided so that warnings once started are completed in the absence of higher priority warnings, even if the warning conditions cease to exist.

Abstract: X-ray examination apparatus includes means for terminating an exposure at a dose determined, in part, by the value of the tube voltage and the characteristics of the intensifying screen in use. Means are provided to read screen-identifying markings on film cassettes and to adjust the turn-off dose level in response thereto.

Abstract: A closed frame single turn potentiometer incorporating a helical coil spring wiper mounted within a rotor. The rotor has a molded-in cavity for containing the wiper and a resilient backing element. The substrate has an aperture therein permitting adjustment of the rotor from either side of the housing.

Abstract: A saving in column memory elements while preserving a stable display with a gas discharge television display device is obtained if a plurality of bits of the digital video information which is entered in the line trace period is passed from the line memory circuit to the relevant column electrode in the line blanking period while bypassing a column memory circuit. The display elements are excited only once during a line period at the beginning of the line period.

Abstract: Disclosed is a method of manufacturing a pyrolytic graphite grid electrode in which after formation of the grid, the electrode is annealed at a temperature of 700.degree. to 1200.degree. C in a reactive atmosphere to remove carbon particles adhering to the electrode surface.

Abstract: A solenoid valve mechanism includes a cooperating poppet and valve seat and a first bias spring for urging the poppet into sealing engagement with the valve seat. A solenoid armature carries the poppet and includes means for selectively urging the poppet against the spring bias. A solenoid coil cooperates with the solenoid armature and the armature is provided with a fluid seal and a second bias spring for urging the armature into position at which the fluid sealing means forms a fluid seal around the valve member. The fluid seal includes a path for bleeding fluid across the valve seat.

Abstract: In a plasma type display panel of the type having a plurality of parallel row and parallel column electrical conductors forming an array of matrix cross points for providing discrete discharge and light emitting sites upon selection and addressing one or more said sites by selection and addressing circuit means electrically connected to the panel conductors, an improved method and apparatus for providing all or part of the selection and addressing circuit means in one or more high density thick film circuit modules adapted to be detachably engaged with the panel and having conductors thereon in superposed relationship with the parallel panel conductors.

Abstract: In an assembly of at least two electrodes which are connected together in an insulating manner, said electrodes are kept at a given distance from each other by at least one member of an electrically insulating material situated between the electrodes which comprises a core which determines the distance between the electrodes and a jacket which directly adheres to the electrode material by heating. The material of the core has a higher melting point than the material of the jacket so that the core during effecting a connection between the jacket and the electrode material maintains its shape.

Abstract: A method and device for controlling the power supplied to an a.c. powered load by zero-passage switching.A ripple voltage which is superimposed on the control voltage synchronizes the start of a sawtooth voltage in a small range on both sides of the zero passage of the power-supply sinewave for the load.The device is employed in electric heating systems.

Abstract: Amplifier device for the UHF-TV band, assembled from cylindrical conductors which are coaxially arranged with respect to one another and connected to a tetrode. The screen grid is grounded and the control grid is provided with dc voltage connecting terminals required for setting the tetrode.