Abstract: A process for the production of laminated capacitors constituted by a stack of dielectric layers separated by metallic foils or plates, those of the even and uneven rows being respectively interconnected by lateral electrical connections. A plurality of juxtaposed master capacitors is produced on a large diameter wheel and a common intercalated layer is used between two successive stacks of master capacitors. The separation of the master capacitor stacks takes place after metal spraying 1 of the lateral edges of the group, so as to maintain the equilibrium thereof and permit the metal spraying of the other lateral edge prior to the separation of the master capacitors and optional cutting up into individual capacitors.

Abstract: A package of the flatpack type for microelectronic circuits comprises a metal base of material having good heat conductivity on which a metal frame is mounted by means of a hard brazing alloy. The frame has the function of supporting connections by means of insulating lead-in bushings of the glass bead type. The coefficient of expansion of the frame and of the base are matched so as to ensure that the base of the package does not exhibit any defect of surface planarity after cooling.

Abstract: An apparatus for welding connections of components, comprising a heating tube having an opening over the entire length of its upper generating line and having in its lower part a notch; a welding device disposed in the notch; and a device for advancing along the heating tube components mechanically held by conductive elements for forming the connections after welding. The heating tube is supplied by a low voltage generator.

Abstract: The present invention relates to an apparatus for the storage and mechanical transfer of stock or matrix capacitors in the form of substantially parallelepipedal bars obtained by stacking films of metalized plastic material on a wheel of large diameter. According to the invention, the apparatus comprises a plurality of endless screws arranged along an arc having a diameter substantially matching that of the parallelepipedal bars after being cut on the wheel, each screw terminating in a circular groove parallel to the transfer direction. The apparatus is employed for the transfer of stock or matrix capacitors towards a station to be cut into unitary capacitors.

Abstract: A process for the production of an electronic component wherein electrical connections are soldered to the lateral sides of the component, after which the latter is introduced into a housing and a solidifiable resin is cast around the component in the housing. According to the invention, the connections are firstly produced in the form of a hairpin comprising two parallel branches interconnected via their first extremity, whereafter a convex part is formed on each branch towards their second extremities, so that after the second extremities are soldered to the lateral sides of the component, the distance between the convex parts and their position on each of the branches permits their insertion together with the component into the housing, the friction of the said convex parts against the inner sides of the housing being sufficient for holding together the housing and the component.

Abstract: Ceramic composition containing alumina, a deflocculating agent and at least one organic binder. According to the invention it is constituted, in dry extract form, by 95 to 99% by weight of a mixture of a first alumina of grain size below 2 microns, which can be fritted at a temperature below 1600.degree. C. for a bulk density below 2.3 and a second alumina of grain size below 3 microns, which can be fritted at a temperature below 1650.degree. C. for a bulk density below 2.4 and 1 to 5% by weight of organic products containing at least one deflocculating agent and at least one binder chosen from among the alkyl polyacrylates and their copolymers.

Abstract: A switching device is provided, for measuring capacities, comprising n branches in parallel with n.gtoreq.1, each branch being formed by a capacity to be measured and a switch, the assembly of switches being subjected to a control signal which successively connects each capacity in parallel across the measuring bridge. Each switch may assume two positions, one of the positions connecting electrically the first plate of the capacitor to be measured to one of the ends of the measuring bridge, the other position connecting electrically the first plate to the second one and to the other end of said measuring bridge.

Abstract: A process is provided for producing a wound capacitor in which at least two films of metal coated dielectric material are wound one on the other, the metal layers forming the plates of said capacitor whose instantaneous capacity is measured by means of a bridge. When the capacity measured is close to but slightly less than the desired capacity, partial stripping of the metal from one of the metal coated films is effected, so as to maintain thereon a metal coated strip, connected electrically to the corresponding plate of the capacitor and allowing the value of the desired capacity to be adjusted accurately without slowing down the winding speed of said capacitor.

Abstract: Dielectric ceramic compositions of the ferroelectric type, especially for the fabrication of multilayer ceramic capacitors having improved properties, contain 90% to 98.5% by weight of barium titanate and 1.5% to 10% by weight of lithium fluoride, in which the barium titanate corresponds to the following formula:BaTiO.sub.3 with a molar ratio TiO.sub.2 /BaO which is lower than 1.

Abstract: The invention relates to a supporting strip for connections for capacitors or the like, a strip provided with such connections and a process for fixing capacitors to such connections.According to the invention, the connection supporting strip has series of upper and lower slots, which are respectively aligned with one another. Each upper slot is wider than the corresponding lower slot in such a way that the introduction of hairpin-like connections with a base shaped like a U located on the side of the upper slot brings about a progressive tightening of the ends of the arms of said connections.This leads to an improvement of the fixing of clips or tabs for capacitors of the "paving stone" type prior to the welding and coating stages.Application to the production of capacitors.

Abstract: The invention relates to recording and reading heads used in the field of magnetic recording.In the case where the same magnetic head serves for these two operations, the invention proposes giving to the two rectangular facing polar surfaces defining the effective air gap, different transverse dimensions, leading to a wide recorded track due to the leakage flux and a narrow read track. This difference minimizes the influence of lateral instability in movement of the mobile magnetic support medium.

Abstract: A power supply bar with low characteristic impedance is provided for transmitting an electric signal from a source to a plurality of receivers, the supply bar comprising particularly two conducting bars conveying the signal, separated by a stack of metal-coated dielectric film forming an assembly of 2 n dielectric films, identical or different, separated by 2 n metal layers, the metal layers in even and uneven rows being respectively connected together laterally by electric connections, the conducting bars being fixed on each side of the stack and connected electrically respectively to one of the lateral electric connections.

Abstract: The apparatus for the visual display of electrical signals recorded on a magnetic medium or support is in the form of a "magnifying glass" which is a plate or sheet of transparent material in which there is a dimple closed by a membrane. The volume of the dimple is filled by a mild ferrite dispersion in a liquid. Under the action of the magnetic field, the ferrite particles are displaced and give an image of the magnetic state of the media.

Abstract: The application relates to a high power tubular ceramic capacitors cooled by an auxiliary fluid. To increase the electrical power dissipated by these capacitors a better thermal equilibrium is obtained by means of a novel turbulent, laminar, cooling water circuit between the capacitor body and a central tube having a large relative diameter, said device cooperating with a connector which distributes the dissipated heat over the capacitor body.

Abstract: A multilayer, ceramic dielectric power capacitor made of plural layers of thin films of dielectric material having a thickness between 20 and 200 microns and a dielectric strength which is greater than that of thick layers, but which reduces the volume of the capacitor. Formed on each dielectric thin film is a conductive foil having a thickness between 2 and 10 microns. The thickness of the dielectric films is quite thin to reduce the volume of the capacitor, while that of the foils is thick, as compared to the prior art, to facilitate removal of heat. An anti-corona groove is provided to protect the connections at the capacitor terminals. The capacitor is useful in high frequency generator applications.

Abstract: A variable capacitor has an elastic conductive electrode. The elastic conductive electrode is capable of reversible deformation to vary the capacitance. The deformation is applied by a screwable adjuster device.