Abstract: A solar collector comprising a U-shaped absorber sealed in an evacuated cover tube provided with a semi-cylindrical reflector on its inner surface, the U-shaped absorber being arranged between the cover tube axis and the reflector, with the central plane of the U-shaped absorber including the center lines of its legs and coinciding with the symmetry plane of the reflector.

Abstract: An electrical cord winder comprises a mechanical section and an electrical section. The mechanical section includes a rotatable cord drum rotatably journalled on a hollow journal secured at one end to a frame, the drum being axially retained between the frame and a plate secured to the other, free end of the hollow journal. A spring is tensioned between the drum and the frame for automatically winding the cord. The electrical section includes rotary electrical couplings which can be fitted into the hollow journal from the free end thereof.

Abstract: A Hadamard domain encoder wherein adding and subtracting operations on digitized intensities of 2 .times. 2 picture points yield secondary results. Likewise processing of groups of 2 .times. 2 secondary results yields further intermediate and/or final results. The complement of unprocessed secondary and final results fully characterizes the original picture but is better suited for data storage and/or transfer because the energy content of the picture is substantially restricted to a limited region. Redundancy in the stored/transmitted data is thus reduced.

Abstract: A charge transfer device in which series-parallel or parallel-series conversion of information which is present in the form of stored charge packets can take place and in which in a semiconductor body a row of charge storage sites is present in which beside said row several substantially parallel charge transfer registers are provided. The charge storage sites and the registers are interconnected by controllable charge transfer paths in the transverse direction so that charge packets can be distributed from the row between the registers or conversely charge packets distributed between the registers can be transferred to the row of storage sites.

Abstract: A method of manufacturing a semiconductor device comprising the steps of providing a plate-shaped semiconductor body, removing by spark erosion a first portion of the semiconductor body, and then using a selective etching process to remove only a second portion of the semiconductor body.

Abstract: A semiconductor transducer chip is flip-chip bonded to a semiconductor interface chip, which is mounted on the ceramic package. Thermal coupling between the package and the transducer chip is minimized by the small contact area between the transducer chip and interface chip. Micron size spacing between the spring membrane in the transducer chip and the interface chip produces squeeze film damping of the spring membrane.

Abstract: A device for displaying a number of lines of characters which are separated from each other by spacing lines on a television tube, comprising a circulating store for one line of characters which is connected to the output of a buffer store for the information of the entire image. An output of the circulating store is fed back to an input of the buffer store. The insertion and deletion of characters is effected by shifting the information between buffer store and circulating store over one or more character positions. Under the control of the correspondence signals from x, y cursor device, the input of the buffer store is then switched over from its own output to the output of the circulating store, with the result that the information in the buffer store is shifted. A vacant position thus produced is available for a new character.

Abstract: A high-pressure discharge lamp having a hydrogen getter in the lamp vessel disposed in a metal envelope which is hydrogen-permeable. The hydrogen-permeable metal of the envelope is covered with a porous halogen-resistant layer. The atoms of the metal halides dissociated in the discharge can recombine at the porous layer so that blackening of the discharge vessel is mitigated.

Abstract: A semiconductor device having a bipolar transistor of the lateral type, preferably a pnp-transistor which is provided in a homogeneously doped semiconductor layer and which may be provided both in an n-type and in a p-type semiconductor layer and of which the base comprises a highly doped contact region and an associated substantially non-depleted active base region, while the emitter zone is situated substantially entirely within the active base region. Herewith, high frequency complementary transistors can be formed in a single epitaxial layer. The invention furthermore comprises a suitable method of manufacturing said transistor in which use is made of underetching.

Abstract: A tape recording and/or playback apparatus having a cassette support positioned vertically by the magnetic head holder. The support is movable with the magnetic head unit in two transverse directions, one in which the heads are inserted in or retracted from the operative position, and the other in which the holder may be latched or unlatched so as to permit the support and magnetic head unit to move into the operating position.

Abstract: JFET memory structures, in particular for RAM's with non-destructive reading-out of the charge state of a floating gate electrode in which the primary selection is realized by means of capacitive coupling with the floating gate electrode. The secondary selection takes place on one of the main electrodes of the JFET structures in which the other main electrode can be connected to the supply. By means of a second common gate electrode the pinch-off voltage of the channels can be adjusted so that the channels are non-conductive in the non-selected condition and a good detection of the information state is obtained in the selected condition.

Abstract: The invention relates to a flash array provided with a number of high voltage combustion flash lamps which each cooperate with a single reflector sheet of an electrically conducting material. This reflector sheet is provided with holes; when a lamp is flashed a radiation-sensitive switching contact is affected via one of the holes.According to the invention the radiation-sensitive contacts open responsive to radiation. These contacts and the reflectors are connected to one another via a low-ohmic connection and whereby further a lamp, whose turn has not yet come, is short circuited. These measures result in the fact that the chance for premature ignition of a lamp is extremely small.

Abstract: A random access memory (RAM) in which each memory cell includes a JFET having two gate electrodes selectable by means of a single word line and a single bit line. The JFETs have a common electrode formed from the substrate of a semiconductor body common to each of the memory cells, which serves as one of the main electrodes of each of the JFETs.

Abstract: A precision current distribution arrangement includes a multiple current source which supplies q approximately identical currents. These currents are separately applied to the q input terminals of a coupling circuit with p output terminals. With the aid of, for example, shift registers these q currents are transferred to the p outputs in a cyclically permuting fashion, in such a way that at each output during each time interval of the cycle always the same number of currents is transferred, so that per cycle each of the input currents is transferred an equal number of times to a specific output terminal. By subjecting the currents at these output terminals to a low-pass filter action a number of currents is obtained whose ratio relative to each other is very accurately defined.

Abstract: When at least an anionic or non-ionic emulsifier which is hydrophilic and highly electrolyte-resistant, and neutralization products of alkyl- and/or alkanol amines with ethylene diamine tetra acetic acid, diethyldiamine penta acetic acid, and/or N-hydroxyethylene diamine triacetic acid or derivatives thereof are added to a leaf fertilizer, a fertilizer is obtained which is miscible with the highly concentrated ULV-pesticides and can be applied in common with these. The water evaporation during the application can be further reduced by the addition of at least one substance of the group polyalcohols, glycose syrup, sorbite, dispersible synthetic materials and polyhydroxycarboxylic acids.

Abstract: A method of manufacturing a semiconductor device in which a layer of polycrystalline material having a high impurity concentration is used prior to the diffusion of a thin region having strong surface concentration and prior to providing a contact to the said region.The polycrystalline layer is comparatively thick prior to the diffusion and is reduced in thickness before the metal contact is provided.

Abstract: A method of manufacturing bodies from meltable crystalline material in which a continuous tape of said material is manufactured by causing melted material to flow along at least one surface of a heated element, which surface is wetted by the melted material, and causing the tape to grow by drawing away a second near the lower side of the surface. Application in particular to the manufacture of semiconductor bodies, for example of silicon.

Abstract: A cassette tape recorder including a device for making index marks on a strip denoting the position of magnetic tape relative to a magnetic head, the marking strip being on a cassette exterior surface and having magnetically alignable particles by which visible, magnetically erasable marks can be made. The marking device includes a controllable magnet for selectively magnetizing an element made of a soft magnetic material which conducts flux to the strip.In a magnetic tape cassette adapted for such apparatus a strip with magnetically alignable particles is arranged on at least one major flat wall of the cassette, so as to be readily visible.

Abstract: Tertiary amines of formula 3 have a strong and prolonged spasmolytic effect, also after oral administration, on the smooth musculature of the tractus gastrointestinalis, the tractus urogenitalis and the bronchial system and have a low toxicity.The compounds can be synthetized according to methods known per se and been formulated to pharmaceutical compositions.

Abstract: Copying by photographic means of plates having coded audio and video information of a very fine structure. Use is made of an aromatic diazosulphide as light-sensitive system, wherein, after exposure, a metal nuclei image is produced by contact with metal salt, which metal nuclei image is at or below the surface and which is intensified by means of physical development to an externally reflective and, as such, readable image.