Abstract: A method of manufacturing metal parts containing an element which is attacked by lead comprising coating the metal parts with zirconium nitride by treatment with a zirconium-containing metal melt.

Abstract: A camera tube target scanned by an electron beam having a radiation-receiving silicon layer which on a side to be scanned by the electron beam has a chalcogen-containing layer comprising at least one element of the third main group of the periodic table of elements, e.g., gallium which forms a heterojunction with the silicon layer.

Abstract: A method of copying magnetic information from a master tape on a slave by contacting the tapes with each other in a magnetic field. In order to be able to make copies on high-coercive copy tapes, a master tape is used on which information can be recorded in a low-coercive condition and can be used for copying in a high-coercive condition.

Abstract: Sampling apparatus in which a gas component which is to be analytically determined is absorbed in a liquid, the liquid and the gas are separated from one another and the liquid is analyzed. The apparatus includes a device in which fluctuating evaporation losses are compensated. This is of particular importance for determining low concentrations, the relevant gas being absorbed in a comparatively small quantity of liquid.

Abstract: A television camera tube is provided with means for background illumination including a light distributor which is accommodated in a space between the anode sleeve and an auxiliary light shielding cylinder which coaxially projects into the anode sleeve and which extends beyond the light distributor so far that the central portion of the target is in a half-shadow.

Abstract: A semiconductor device, in particular a target and a camera tube, respectively, for color video signals, comprising a semiconductor body having a radiation-sensitive layer, a dielectric layer and indicator members to obtain an indexing signal. According to the invention, the indicator members comprise a surface region on which thickness of the dielectric layer is different from that on the adjoining parts of the surface.

Abstract: Resin beads impregnated with magnetic powder, e.g. barium ferrite or .gamma.-iron oxide magnetically aligned and located discretely with respect to each other are formed by suspending the beads in a liquid while polymerizing the resin and subjecting the beads to an aligning magnetic field during a portion of the process of polymerization of the resin at which the resin viscosity is sufficient to permit rotation of the magnetic particles and yet sufficiently high to prevent lateral movement, and hence clumping of the magnetic particles, e.g. a molecular weight range of between 1,000 and 10,000 and a viscosity of between 5 and 50 poise.

Abstract: A display panel having an intermediate plate constructed from strips in cross bond, in which luminescent and reflecting material is previously provided on the side faces of the strips.

Abstract: A method of absorbing residual gases in a television display tube wherein a holder containing a barium-aluminum alloy, germanium nitride (Ge.sub.3 N.sub.4) and a nickel containing material is placed in the tube and heated to release the nitrogen and barium which is dispersed within the tube in such manner that the amount deposited on the screen is minimized.

Abstract: A method of preparing iron powder for recording in which iron oxide hydrate powder is reduced by flowing hydrogen in intimate contact with the iron oxide hydrate powder, preferrably in a fluidized bed.

Abstract: A source of magnetic bubbles comprises a plate of magnetic material which is situated in a principal magnetic field directed transverse to the plate, a loop conductor having an inner side and an outer side which are defined as such and in which alternately directed current pulses can be generated, and also comprising a first and a second preferred structure. The preferred structures project as far as inside the loop conductor. On the first preferred structure a magnetic bubble remains which, under the influence of a first current pulse in the loop conductor which attenuates the magnetic field, expands such that the second preferred structure is also covered.

Abstract: A camera tube employs a target comprising a layer of optically transparent infra-red radiation responsive material and a layer of photoconductive material which is scanned, in conventional manner, by an electron beam. This tube combines the principles of a infra-red image sensor with the more conventional principles of a vidicon target.

Abstract: A television camera tube having a conductive gauze behind the target plate, the parallel wires of which cross each other at an acute angle which has been suitably chosen to minimize interference in decoded colour signals.

Abstract: A magnetic device comprising a first and a second plate of a magnetic material between which domains are situated. An interaction force occurs between the domains in the two plates. Stable domain positions in a second plate define equally stable domain positions in a first plate. One or both plates can be provided with domain guiding structures. Domain displacement in one plate can control a domain displacement in the other so that a variation in the interaction force is produced.

Abstract: The invention relates to a device for magneto-optic memories controlled by light and/or heat in an external magnetic field, in which the magneto-optic material of the memory has a photoconductive layer which can be activated by the control beam and which can be controlled by means of electrodes provided thereon via a current or voltage source.

Abstract: A method and device for determining acentricities in a powder material by illuminating the powder with a collimated coherent light beam of given wave-length which generates a second harmonic in the material. The second harmonic with the fundamental removed by filters is divided by a beam splitter and sent to two photomultipliers -- one of which has a narrow band filter to select only light of one wave-length. If all the light is generated at the second harmonic equal signals are produced by the photomultipliers. If non-second harmonic radiation is produced, a larger signal will be produced in the unfiltered reference channel.

Abstract: A gas discharge panel in which the cathodes are placed in grooves and are connected to the bottom of the groove throughout their length by means of low softening-point glass enamel. The glass is preferrably devitrified (crystalline).

Abstract: A data processing device utilizing magnetizable media operating with the displacement of magnetic domain walls, in particular walls of "bubble" domains, which are propelled by fields which move walls with a speed which is as large as possible, and are operative only for a restricted time, preferably shorter than 20 nanoseconds.

Abstract: Magnetic device comprising at least one thin layer of a magnetisable material which has a preferred direction of magnetisation substantially at right angles to the surface of the layer. Magnetic domains are produced by a magnetic field which is situated substantially in the plane of the layer and does not change direction and enables similar domains to be produced. The domains are there after maintained by a field normal to the layer. A domain guide structure may also be provided on the layer to move the domains.

Abstract: A flat large-area photocathode intended for use in an intensifier tube is constructed so that a pre-determined potential gradient can be maintained across its surface in operation in order to simplify the electron-optical system of the intensifier. This is done by providing photoemissive material on an electrically resistive layer or sheet on a major surface of which is provided a series of spaced rings of electrically conductive material one inside the other. The spacings and widths of the rings are chosen so that, when a potential difference is applied between the center and the edge of the sheet or layer, the desired potential gradient is set up across the surface of the photocathode. The intensifier tube may be an x-ray image intensifier.