Abstract: A method of frequency tuning a piezoelectric device and apparatus for the implementation thereof. A piezoelectric device having at least one resonating function is formed by two metallized electrodes facing each other, on a face of a plate made of a piezoelectric material. An arranging step arranges the plate, fitted with the electrodes, in a tuning position in proximity to an ion source. Then, an exposing step exposes the plate to an ion flux produced by the source and the ions etch the metal. A measuring step measures the resonant frequency of the resonating function while the plate is in a tuning position. Finally, a raising step raises at least one electrode exposed to the ions to an adjustable bias voltage to control the rate at which the metal on the electrode is etched.

Abstract: A perfected metal detector for passageways, equipped with transmitter-recer Tx-Rx windings connected, using suitable amplifiers A and D, to an Analysis and Control Logic Unit LAC where the signals are compared; and also equipped with at least one corrective receiver winding CC on each side of a supervised passage used to supply information to the LAC unit about metal bodies in transit along paths close to it, with the aim of rendering uniform the interceptive sensivity throughout the transit area, even when more than one metal body is in simultaneous transit.

Abstract: An existing luminaire may be updated with an improved reflector by removing the lamp from an existing lighting fixture and inserting a lamp socket extender which is designed to accept a plurality of different configuration reflectors for various types of lamps having selected intensities, diffusion and distribution characteristics. The reflector adaptor eliminates adjustment problems involving the position of the reflector relative the lamp.

Abstract: A process for recovering palladium, rhodium and ruthenium from aqueous solutions deriving from the treatment of nuclear fuels and containing also iron and nickel, by reducing carbonylation with carbon monoxide at a pressure up to 1 atmosphere in a nitric acid solution at a pH of between 2 and 4 and at a temperature of between room and 100.degree. C. and reaction times of from 6 to 100 hours.

Abstract: A two stage seal for a shut-off valve having a bonnet with a rotatable valve stem therethrough. The first seal is conventional packing material axially compressible to adjust its sealing force against the valve stem. The second is a cartridge seal gland with inner and outer "O" rings axially biased against the packing material by a packing nut threaded in the bonnet.

Abstract: A dispenser capsule for liquid or paste products comprising an element slng in a tubular envelope between an open raised position and a closed retracted position, via a maneuvering thruster for respectively disengaging or blocking a flow opening of the product contained in the receptacle on which the capsule is mounted. The capsule comprises a cowl which is adapted to be mounted on the neck of the receptacle and which is affixed to the envelope in which is slidably mounted a piston guided axially by the envelope and by a chimney also affixed to cowl, the chimney communicating by one end with the opening of neck of the receptacle, its other end having an opening which is reduced with respect to that of the neck and in communication with said flow opening when piston is in a raised open position. The piston comprises a top and a lateral wall forming the maneuvering thruster and wherein the envelope is provided with a recessed portion enabling access to the thruster for its activation.

Abstract: A method for making a brush element for a brush roller wherein bristle bunches formed by folding bristles over bent portions of U-shaped staples have their folded portions and associated staples inserted through tight fitting apertures in a base portion of a frame so that legs of the staples are bent by collision with a facing side of an attachment section of the frame. A hardenable adhesive is then poured into the frame between the base portion and the facing side around the staples and folded portions of the bristle bunches. The adhesive is hardened, bonding the staples in the adhesive and affixing the bristles to the base portion. The adhesive may be a polyurethane-base resin having viscosity allowing absorption of the adhesive between the bristles near their folded portions, the tight fit of the bristles in the apertures holding them in place during pouring and hardening of the adhesive.

Abstract: A motor-driven machine with variable torque setting feature, especially a screwing machine with a torque-controlled switching-off feature, has a shaft which is driven by a motor via a transmission for driving a tool, and a setting ring for presetting a torque at which the shaft is to be disconnected from the transmission and/or the motor will be switched off. In order to enable approximately identical torque curves to be achieved for hard and for soft screwing applications, a clutch with a variable tripping torque is provided whose tripping torque can be adjusted via an indexing ring, which latter can be adjusted together with the setting ring.

Abstract: A scale system for absolute measurement includes at least one scale (1') which extends along a measuring length, and at least one measuring slide which is movable in relation to the scale. The system includes a fine sensor which functions to measure the absolute values within each of the intervals lying along the scale (1'), and further includes a rough sensor which functions to measure the absolute values with regard to the interval in which the fine sensor is located at that time. The scale system further includes at least one rough scale (2', 3') whose scale electrodes (2a, b, 3a, b) define a predetermined angle to the direction in which a measuring slide is moved along the scale, wherein the measuring electrodes of the measuring slide also define a preferably corresponding angle (.alpha.

Abstract: The present invention relates to novel 4-methylthiazole derivatives, to tr methods of preparation and to the pharmaceutical compositions in which they are present.According to the invention, these derivatives have the general formula ##STR1## in which n is equal to 0 or 1 and R.sub.1 and R.sub.2, which are identical or different, are selected from a hydrogen atom, a halogen, a hydroxyl group, a trifluoromethyl group, an alkyl group having from 1 to 4 carbon atoms and an alkoxy group having from 1 to 5 carbon atoms and are useful in the treatment of cardiovascular diseases associated with hyperactivity of the sympathetic nervous system.

Abstract: The invention proposes a grinder having a rocking shaft adapted to set a grinding tool into an oscillating movement about a rocking axis fixed to the device, the grinding tool having a grinding surface comprising at least one corner area. For the purpose of extracting the grinding dust, there is provided a suction hood, which can be fixed on the device and which communicates with a suction pipe. In order to prevent the risk of surface marks forming during micro-finishing of surfaces, and at the same time to guarantee efficient dust removal, the grinding surface is designed as a continuous, closed surface, without any openings, the suction hood enclosing the grinding tool from above and at least part of the lateral faces of the grinding tool. The suction pipe opens laterally into the suction hood in an area opposite the corner area of the grinding surface. Further, the suction hood comprises a suction chamber extending from the suction pipe to the corner area of the grinding tool.

Abstract: A cutting knife for a cutting tool equipped with an oscillating drive, for cutting off the cement bead of a glass pane cemented in place, in particular in a motor vehicle, comprises at least one cutter element which can be connected, via a mounting element and a mounting opening, to an oscillating drive by which the cutting tool can be set into an oscillating motion about a rocking axis. In order to enable the cutting depth of the cutting tool in the material to be adjusted, the cutter element is provided with a slot extending between the mounting opening and an end of the cutter element opposite the mounting opening, with a roller being held thereon for displacement along the longitudinal axis of the slot.

Abstract: The invention proposes a method for grinding plastics or glass, in particular for grinding acrylic glass, where a mechanically driven grinding tool is moved across a surface to be finished (44). Grinding is effected by a dry process, without any liquid working agent, the grinding tool performing an orbital movement, or oscillating about a fixed rotary axis at high frequencies, while the grinding dust is extracted from the marginal area. The grinding tool comprises a closed abrasive with resiliently embedded abrasive grains, a plurality of the resiliently embedded abrasive grains having, preferably, level front surfaces which are delimited by relatively sharp edges at the transition to their lateral surfaces, the greatest part of the front surfaces being oriented to extend substantially in parallel to the surface to be worked (44). The method enables plastic and glass surfaces to be micro-finished to a particularly high grade (FIG. 1).

Abstract: A machine stand and a method of constructing it particularly a machine stand for so-called coordinate measuring machines. The machine includes one or more vertical legs, one or more horizontal beams, and a rod or bar which is mounted on a horizontal beam and intended to carry a measuring head tool or the like. At least one vertical leg is supported by a base element. The vertical leg supports at least one beam, and the rod can be moved to any selected point within the space volume defined by the stand by moving the leg, the beam and the rod relative to the base element. At least one vertical leg is mounted relative to the base element so as to be flexurally rigid and non-rotatable about its longitudinal axis; the beam or beams are not non-rotatably and flexurally rigidly connected, so that a yielding structure is obtained. Deformation of the first vertical leg is measured by measuring means, so as to be able to determine deformation of the structure.

Abstract: The present invention relates to a process for controlled dissolution of a crystalline material consisting of a number of kinds of ions, in a solution containing a solvent for the crystalline material. Before dissolution, the solution contains at least two kinds of ions of the crystalline material. The molar concentration of ion of each kind is higher than zero and lower than the molar concentration of ion of each kind which the solution would have at saturation if it contained all of the constituent ions of the crystalline material, under the temperature and pressure conditions of the dissolution.

Abstract: A portable power tool has, in order to drive a tool (12), a hollow spindle (14) to which the tool (12) can be fastened between two flanges (16, 18). The outer flange (16) is configured at the end of a clamping bolt (22) that is inserted through a central opening (17) of the tool (12) and projects at its other end out of the housing (42). The clamping bolt (22) can be non-rotatably secured at this end by means of a retaining element (20). For actuation, a clamping device (24) is provided, which can be moved, against the force of spring elements (26), between a clamped position in which the retaining element (20) is acted upon axially to clamp the tool (12), and a released position in which the tool is disengaged for manual changing. The spring elements (26) are arranged between an axial fixed stop (28) and an axially displaceable stop (FIG. 1).

Abstract: A restraining device for motor vehicle occupants has an inflation device, a housing, and an inflatable airbag connected with the housing. In order to provide a simple and inexpensive airbag attachment to the housing with a functionally correct grip, provision is made for the airbag to abut the outside of the housing by at least one suspender-like section.

Abstract: A device is disclosed for producing surface channels of at least approximately rectangular cross-section in sheeting consisting of a soft material, in particular mineral-fiber insulating mats or sheeting consisting of a styrene polymer. The device makes use of a motor-operated cutting tool with an oscillating cutter. The cutter comprises sections which are bent off relative to each other and which are provided with a cutting edge, at least in part. The cutting edge extends over at least three of two sections which form together a U or L, respectively. The cutter is passed through the sheeting approximately along a straight line.

Abstract: A pair of ceramic disks for mixer faucets includes a fixed disk and a smaller mobile disk adapted to slide on the fixed disk within given limits. The fixed disk has on one side a bearing surface adapted to lie against the mobile disk and has two feed openings and one outlet opening through it. The bearing surface of the fixed disk has a closed main rim around the three openings and at least one depression in the surface through only part of the thickness of the fixed disk. In any position of the mobile disk relative to the fixed disk, the bearing surface of the mobile disk bears on the rim all around the depression. The bearing surface further includes an inner rim which in the closed position of the mobile disk isolates the outlet opening from the feed openings.

Abstract: A bead release unit comprises an arm (1) which at one end carries a bead ease tool consisting of a curved plate body, whereas at its other end it is intended to be hinged to a supporting structure so that it can rotate between two positions in which it positions said tool respectively distant from and in contact with the tire of a wheel (wheel rim+tire) resting against a locator. The tool (6) is supported by said arm (1) by way of an articulated joint comprising two coplanar pins (8), (9) connected together, of which the first (8) is arranged transverse to the generating lines of said tool to enable this latter to rotate within a plane perpendicular to the plane of rotation of the arm (1), whereas the second (9) is substantially parallel to the generating lines of the tool to enable this latter to rotate within a plane transverse both to the plane of rotation of the arm and to the plane of rotation of the tool about said first pin.