Abstract: A fluorescent lamp requiring a smaller amount of luminescent material than is normally required. The luminescent layer is composed of component layers, the component layers which do not face the discharge contain a mixture of the luminescent material and a white pigment which reflects ultraviolet radiation.

Abstract: A stylus unit having a stylus holder with a stylus at one end, a magnetic element captured in the holder, and a locating wire, the stylus holder and the locating wire formed of a reinforced plastic.

Abstract: A method of forming apertures in a thin metal tape. Cavities having a depth of at least half of the tape thickness are first etched from one side. Etching is then carried out mainly from the other side until apertures having the desired profile have been formed. During etching the first-mentioned side, the said other side is covered with a foil of synthetic resin. Shadow mask for a color television display tube manufactured according to a similar method.

Abstract: An infrared tubular incandescent lamp provided with a cap assembly and current supply lead at each pinched end of the lamp vessel. The caps are not electrically conductive and are heat sinks. Each cap assembly includes a formed ceramic member enclosed by a cap with a good heat conductive mass embedded between each pinched lamp seal and its surrounding metal cap. A luminaire for this lamp is provided which contains means resiliently engaging the lamp cap so as to form a heat sink.

Abstract: An interchangeable random-access magnetic storage element, comprising an electromagnetic disk disposed in a substantially cylindrical dust-proof enclosure, which as an assembly can be fitted onto a drive spindle of a drive means. The enclosure comprises two covers which are clamped against each other with the insertion of dust seals, which together with the magnetic disk are rotated by the drive spindle, the upper cover being axially lifted by lifting cams provided on the drive spindle, so that an annular slot is obtained between the lower and upper cover for the passage of electromagnetic recording and reproducing means. At its top the drive spindle comprises an axially movable pressure member, which upon closure of a cover of the drive means is depressed and thus clamps the electromagnetic disk onto the spindle and simultaneously lifts the upper cover.

Abstract: A high gain digital phase comparator which in digital phase lock loop systems can give a thousand-fold reduction in ripple and close-in noise sideband amplitudes. The comparator is of the sample-and-hold type but the normal ramp reference waveform is replaced by a trapezoidal waveform with a very steep rising or falling slope generated by a trapezoidal waveform generator. This slope is sampled by a sampling circuit coupled to said generator and its steepness gives the increased gain of the phase comparator leading to the reduced noise and ripple. Additional logic and switching circuits are added to make the comparator operate only during a rising edge of the trapezoidal waveform.

Abstract: Alarm signals are produced in response to variations in the radiation conditions between a pulsed IR-transmitter and a IR receiver whose output amplitude is adjustable and which is synchronously chopped by the emitted pulses, and the adjustable output signal voltage of the receiver is compared with a reference signal voltage derived from the transmitter in a comparator which is chopped synchronously with the pulse frequency of the transmitter. The comparator is followed by a control voltage generator with an integrator stage for a control element, which controls the output amplitude of the receiver, and a decision unit, to which an alarm means and a control indicator are connected.

Abstract: A reversible optoelectronic device for use in a narrow range of light wavelength, comprising a semiconductor body comprising at least one transparent surface region of a first conductivity type and an assembly of two active regions, one of said active regions having a first conductivity type and another said active region having the opposite conductivity type and determining a semiconductor junction having electroluminescent and photosensitive properties, said assembly of said two active regions consisting of a material having a smaller forbidden bandwidth that the material of said surface region, said surface region being a strongly doped and localized in a deposited layer that is of the same composition and that has a low doping, the depth of said junction with respect to the boundary between said layer and said assembly of active regions being between one-half and one-quarter of the diffusion length of the minority carriers in said active region of the first type, and said material of said assembly being s

Abstract: Vehicle identification system comprising a carrier period detector in which, to increase the accuracy of identification signals received, the identification signal is rejected and a new identification signal is requested whenever one period is absent from the carrier signal received.

Abstract: A switching device comprising a movable blade wetted with a liquid metal, and a stationary blade having a surfacelayer of a non-metallic material which is not wetted by the liquid metal.

Abstract: Each of the ends of a helical cathode for a magnetron are connected to the respective end plate and supporting rod by a single collective weld.

Abstract: A vibratory drive assembly for use with an electric motor driven apparatus comprising a plate driven in reciprocating vibratory movement and mounted on a frame via integral hinge strips which are arranged with their longitudinal directions transverse to the direction of vibratory movement and transverse to the longitudinal direction of an associated pin-shaped drive element.

Abstract: A device for starting and operating a discharge lamp, in particular a low pressure sodium vapor lamp. The device comprises two input terminals connected by means of a coil and the primary winding of an auto-transformer with the lamp connected in series with a capacitor between the ends of the transformer secondary winding. In the operating condition of the lamp the core of the transformer becomes saturated. The lamp is shunted by an electronic starter which assists, in the operating condition of the lamp, in the restart of the lamp during each half cycle of the AC electric supply.

Abstract: In a color display tube of the post focusing type the color selection means comprise a first and a second system of lens electrodes. A lens electrode belonging to the first system is connected by means of a diffusion bond to one of the metallized sides of an electrically insulating member which is metallized on two sides. A lens electrode belonging to the second system is formed either by the other metallized side of the insulating member or is secured to said other metallized side of the insulating member also by means of a diffusion bond.

Abstract: A cathode ray tube construction and more particularly a supporting structure for the color selection electrode of a color television tube. The color selection electrode is formed with a frame member to the outer periphery of which is secured a mounting strip which engages a stud formed as part of the envelope. The mounting strip is formed with a lug portion which limits movement of the frame and a second portion which extends into the aperture of the frame allowing for easy insertion and removal of the frame.

Abstract: A deflection coil unit for color television, comprising coils which are toroidally wound on a ring core having a flared inner surface. The parts of the coils which extends along the inner surface are situated in grooves having side walls whose plane is parallel to the axis of the ring core.

Abstract: A network computer system in which the individual processors are arranged in the form of a matrix, with each processor connected with its directly neighboring processors. The individual processors are checkerboard-like assigned to one of two groups, and each group is connected, by its own instruction line, to a control unit for connection to the control computer. The system is useful in performing iterative calculations in which the processors of the one group calculate new values on the basis of initial data previously calculated by the directly adjacent respective processors of the other group.

Abstract: The stator of the drive motor of a rotary anode X-ray tube is composed of a plurality of radially displaceable sector elements. As a result, the anode can be accelerated and decelerated while using a narrow airgap, and the airgap can be widened for bridging the high voltage to be applied at a later stage. The invention can be realized in automated form by using a blocking device for the high voltage and a tachometer.

Abstract: In a color CRT, the mislanding of electron beams due to thermal effects in the shadow mask is compensated for by means of an electron-absorbing insulating layer on the display screen, which layer has apertures which are in registration with the luminescent regions of the display screen.

Abstract: A surface acoustic wave band-pass filter comprising a piezoelectric substrate having on one surface first and second SAW resonators tuned to the same frequency and coupled together. An input transducer is coupled to the first resonator and an output transducer is coupled to the second resonator. Each resonator is preferably formed by two spaced apart aligned grating reflectors and the two resonators are preferably coupled by an array of discrete parallel metallic strips extending between the two cavity resonators.