Abstract: A hand-operated thermal press for installing metal inserts in a workpiece of a thermoplastics material comprises a frame (12) including an upright post (16) on which is slidably mounted a support bracket (24) carrying an insert driver (18). Movement of the bracket (24) along the post (16) is limited by adjustable clamps (20, 22) and the bracket (24) is biassed into a starting position by a coil spring (28). A hand-operable mechanism (34) is provided for moving the insert driver (18) along the post (16). The insert driver (18) incorporates a heating unit movable relatively to the insert driver (18) against a biassing spring (100). The heating unit includes a core (70) heated by the unit and which supports a bit (92) adapted to receive the metal insert to be installed. The clamps (20, 22) are adjusted to provide a required movement of the insert driver and the spring bias (100) ensures a consistent driving force for installing the insert.

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: A condenser block comprising a stack of insulating layers, separated by metal plates, arranged in relation to one another in such a way that at least part of each metal plate is approximately opposite at least part of another plate, in the direction of stacking, these metal plates forming the condenser plates. In this invention, one metal plate, positioned between any pair of insulating layers, and opposite a second metal plate, placed above the first such plate, between a second pair of insulating layers, faces a third metal plate, also placed above the first plate, between a different pair of insulating layers from the second such pair.

Abstract: The invention relates to a hydrostatic support device placed between two elements movable one with respect to the other, comprising a hydrostatic guide-block, a magnet being mounted on one of the said elements, opposite the second element, so that the latter is traversed by the lines of magnetic forces pulling the second element towards the first element.This device comprises a demagnetizing circuit associated to each magnet and constituted by an A.C.-supplied electro-magnet.The present invention finds an application in the production of hydrostatic guide-blocks for use in the construction of machine-tools.

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: A frequency regulated crystal oscillator with (1) an oscillating circuit made up of an amplifier, piezoelectric crystal and voltage controls capacitor, and (2) a two-part compensating circuit connected to the terminals of the variable capacitor, each part having thermistors whose resistance varies with temperature to produce complementary signals and which are shunted with electrical resistors.

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: The invention relates to a rotary sector device turning at a variable angular speed for automatic labelling machines. Said device carries out the withdrawal of labels (6) from a container (5) acting as a magazine and the transferring of the same to an operating area where they are applied to the products for which they are meant (bottles, boxes, etc.).Said device includes a plate (1) turning at a constant angular speed to which a plurality of rotary sectors (4) are mounted, each of said sectors turning about a corresponding vertical axis (A) at an angular speed varying according to a predetermined law of motion. This law of motion is accomplished by means of a toothed belt (27) kinematically connected to a circular pulley (36) coaxial to a corresponding rotary sector (4) and to a fixed asymmetric pulley (26), disposed in a central position with respect to the rotary plate (1).

Abstract: An apparatus for reducing end effect in anodes used in cathodic protection systems for underground metallic structures and in which the anodes are surrounded by and are in intimate engagement with a carbonaceous material so that an impressed current which is supplied to the anode is discharged from the anode in a substantially uniform current discharge density which is maintained at a level that is electronically conducted by the carbonaceous backfill to the earth. The anode includes an elongated body of electrically conducting material having a plurality of non-conducting segments which separate the body into conducting areas of non-uniform size and which take advantage of mutual interference between adjacent conducting areas to substantially prevent electrolytic current discharge from the anode.

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 disclosure is directed to an apparatus and method for analyzing gem specimens. In the disclosed embodiment, a small cabinet includes a source discharge lamp for radiating electromagnetic energy over a broad spectrum of wavelengths. A gem specimen is placed in a small drawer that, upon closure, becomes an optically sealed chamber in communication with the radiation source. Also upon closure, a mechanical shutter mechanism permits registration between the radiation source, gem specimen and a photocell detector that senses radiation emitted from the gem specimen as a result of its interaction with the spectrum of wavelengths from the radiation source. This interaction comprises the combined processes of transmission of and absorption by the gem specimen of the source radiation, internal reflection and internal excitation (e.g., fluorescence), the latter of which produces a frequency shift to a narrow spectrum of energy which the photocell detector is specifically designed to sense.

Abstract: The apparatus includes a spray nozzle having an orifice plate leading to a vertically oriented opening for directing liquid onto a dispersion plate which is disposed below. The dispersion plate is frusto-conically shaped and has a fluted outer periphery for breaking the liquid up into droplets. A central aperture is formed in the dispersion plate leading to a conical dispersion element which has raised projections on its surface for breaking liquid up into droplets. A filter screen can be removably mounted over the top of the orifice plate for filtering debris or the like prior to its entering the nozzle. The apparatus is especially adapted for use in cross flow water cooling towers.

Abstract: An annular elastomeric seal-ring construction having a body adapted for stabilized retention in a circumferential seal-ring groove in one of two relatively rotatable members and for circumferentially continuous resilient contact with an opposed wiping surface of the other member. The resilient wiping contact is established via an integral rib of width less than body width, wherein the locus of the rib undulates axially as a function of azimuth about the axis of the ring body.

Abstract: Spray nozzle permitting the spraying of liquid, having a body provided with a cylindrical chamber of given diameter for the passage of a liquid into a nozzle in which the nozzle liquid outlet has a plurality of equidistantly spaced, identical holes, whose axes are inclined relative to the nozzle axis. A member positioned at the intake of the liquid into the nozzle defines a passage for the liquid outflow, and has a diameter less than the diameter of the chamber. The member has a concave face at the inlet and a constriction of the passage limits the liquid flow entering the nozzle. Fixing means permit the member to be fixed to the nozzle body.

Abstract: A guiding device comprises a support, including a first substantially planar guiding surface; a movable body adapted to be guided on the support, and including a second substantially planar guiding surface; and a plurality of hydrostatic guide blocks disposed between the first and second guiding surfaces, each guide block including a first hydrostatic bearing portion connected to a source of pressurized fluid for slidably connecting either the movable body or the support to the respective guide block, and a second hydrostatic bearing portion connected to the source of pressurized fluid for slidably connecting the other of the movable body and the support to the respective guide block, and in which each of the first and second bearing portions includes a flow restriction for restricting the flow of fluid from the source of pressurized fluid to the respective bearing portion, whereby fluid flows from the source to the first bearing portion without passing through the second bearing portion and fluid flows from

Abstract: In a method for obtaining aqueous gels based on galactomannan and xanthan, the xanthan employed has first been subjected to a treatment resulting in partial or total deacetylation before being introduced in the mixture in which the ratio of deacetylated xanthan to galactomannan is within the range of 15/85 to 90/10. Potential applications include the food industry, explosives or air-treatment products.

Abstract: A temperable container with a heat-insulating jacket completely enclosing a tank supported in the container with predetermined passages between the tank and the jacket for conducting a heat transfer medium in forced circulation around the entire outer surface of the tank. An inlet and outlet pass through the jacket to connect to external equipment for supplying the heat transfer medium, and to avoid a short circuit flow from inlet to outlet a partition is provided in the container and has at least one throttleable bypass opening the throttle position of which can be adjusted by a programmable control.