Abstract: The screen is provided by surrounding the coil producing the magnetic field with a set of electrical conductors the currents within the conductors being controlled in such a manner that the field is neutrailized in a specific region of space, the current distribution within the conductors being determined by calculating the current within a hypothetical superconductive shield which would have the effect of neutrailizing the field, the current through the conductors thereby being a substitute for the superconductive shield.

Abstract: A specifically-reactive sample-collecting and testing device possessing a cavity or cavities each having a dimension small enough to enable sample liquid to be drawn into the cavity by capillary action, wherein a surface of the cavity carries an immobilized reagent appropriate to the test to be carried out in the device, and wherein said surface is a surface of a transparent solid plate to act as a light-transmissive waveguide and forming a wall of the cavity, said plate having an edge which is substantially optically smooth and transverse to the plane of the plate.

Abstract: A cumulatable ultrafine polymer particle consisting of one molecular chain of the polymer is prepared by spreading a dilute solution of the polymer at the interface between the atmosphere and a subphase solution having a weak affinity for the polymer, and evaporating the spreading solvent or dissolving it into the subphase. A composite material comprising the polymer particles is produced by contacting the particles formed on the subphase solution with the surface of a substrate. The particles are cumulated on the substrate in a ratio of area occupied by the particles of at least 10%. The particles may be cumulated in multiple layers on the substrate.

Abstract: Soft soldering compositions posessing equal or better melting, wetting and strength properties than conventional straight tin-lead solders but with a reduced tin content are disclosed. The compositions consist of 1-35 wt % tin, 5-30 wt % cadmium 0.05-2.5 wt % antimony, balance essentially lead with 5-30 wt % cadmium, and/or 1-15 wt % bismuth. The solder alloys are characterized by their improved properties concerning solidification temperature gap, spread percentage, wetting time and shear strength. Specific compositions are disclosed having the necessary properties to successfully replace the tradional tin-lead solders containing 30, 40 and 50 wt % tin. The high temperature performance of bonds made with these new alloys are better because of their reduced tendency of intermetallic compounds formation with the substrate due to their lower tin content.

Abstract: This invention relates to several thromboxane A.sub.2 inhibiting 7-[3-.alpha.-[1-[[(phenylamino)-thioxomethyl]hydrazono]ethyl]-bicyclo[2.2. 1]-heptenoic acids, pharmaceutical compositions employing them and methods of their use.

Abstract: A device for the sustained release of active substance comprises a wall defining a cavity for the reception of active substance, the wall being of impermeable material and having one or more ports therethrough. Sections of hydrogel material are within the cavity, the hydrogel, in use, being swollen to cover the ports in the cavity wall. Active ingredient is released from the container only through the hydrogel covering the ports. In this way sustained and controlled release of the active substance from the device is obtained.

Abstract: A spray apparatus for the treatment of a harvested crop, the apparatus including a high voltage electrostatic spray head, a sprayhood surrounding the sprayhead and having an aperture opposite the sprayhead and insulating means to suspend the sprayhood with the aperture adjacent a region of a conveying path to establish and maintain the sprayhood covering said region of said conveying path, the sprayhood having on the outside an insulating cover and inside the cover an extensive insulated electrode extending around and above said aperture, the electrode being energizable in operation to a potential similar to that applied to the sprayhead, whereby the support means and electrode together permit the application of an electrostatically charged spray from the sprayhead in a controlled manner throughout said region of the conveying path under the sprayhood to a quantity of crop conveyed past on the conveying path in a regular manner.

Abstract: A height or level adjusting device for use with a platform assembly, which platform assembly has a platform section and an upstanding cross brace member oriented between the platform section and a support surface. The cross brace member has a pair of laterally spaced, upstanding extensions thereon. A cross piece support member is provided as is a first mounting structure for facilitating a mounting of the cross piece support member on the cross brace member. A second mounting structure is also provided for facilitating a mounting of the platform section on the cross piece support member. A housing structure is provided at each end of the cross piece support member. Each housing has at least one open side forming an opening into an interior cavity of the housing structure and a bottom wall of the cavity.

Abstract: A platform assembly having a pair of separate, laterally spaced and parallel side rails. At least one elongated load supporting structure is provided and is connected to and extends between the side rails. The load supporting structure has a load supporting surface on a top surface thereof and, at opposite longitudinal ends of the load supporting structure, at least a pair of L-shaped flanges. A first of the flanges is adjacent the top surface while a second of the flanges is adjacent a bottom of the load supporting structure. The load supporting structure is coupled to the side rails by first orienting the longitudinal axes of the load supporting structure and the side rails perpendicular to each other and then sliding the load supporting structure onto the side rails. The L-shaped flanges grip around the upper and lower edges of the side rails.

Abstract: A method of manufacture of thin film, field-effect transistors formed on a transparent substrate and with transparent, conductive source and drain electrodes, uses initially deposited gate electrodes as a mask in association with photolithographic processing using radiation transmitted through the substrate and electrodes to minimize parasitic capacitance between the gate and source and drain electrodes.

Abstract: A device for administering oral fluid to a patient from a container (18) has a nipple (14) connected to the container (18) by a tube (16). The nipple (14) is held on the patient's tongue. A valve (22) opens in response to the patient sucking or pressing the nipple to initiate a flow of fluid in the tube (16). A detector (92) responds to this flow and switches on a peristaltic pump (90) for a period determined by the setting of a controller (102) to deliver positively a suitable bolus of 2 to 6 ml to the patient. To give the patient time to swallow the bolus, the detector (92) is inhibited for a predetermined delay period after termination of the bolus and over the same delay period, the tube (16) remains pinched or clamped.

Abstract: A biologically compatible adhesive dental primer that is shelf stable as a single component adhesive and includes a mixture of an adhesive promoting and polymerizable monomer system having a free radical polymerizable monomer or prepolymer having ethylenic unsaturation and a phosphorus containing adhesion promoter which is free from halogen atoms bonded directly to a phosphorus atom, and optionally a free radical polymerization catalyst, and an accelerator for the catalyst.

Abstract: Novel ultrathin unit layers and built-up multilayers of polymeric imine are obtained when a spreadable polyfunctional aldehyde or its precursor, particularly the alkyl Schiff base formed by its condensation with an alkyl amine, is spread on the surface of an aqueous subphase containing a diamine. The resulting polymeric imine unit layers can be transferred and built up on substrates which included quartz, aluminum and chrome-plated glass, and semiconductors.

Abstract: A process for the manufacture of benzoic acid is described. The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transition metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br.sup.-, F.sup.-, Cl.sup.-, OH.sup.-, CH.sub.3 COO.sup.- or HSO.sub.4.sup.-. The benzoic acid produced is characterized by its very high purity and high conversion reaching generally values of above 95%.

Abstract: To separate minerals, they are made up into a slurry A applied to a hollow tapered cylinder 301 spinning on its axis to generate 10 g centrifugal force.The cylinder 301 is also subjected to axial vibration at 5 to 10 Hz. The cylinder widens at a half-angle of 1.degree., and its axis is inclined at 2.degree. upwardly in the direction of widening.A film of slurry is held centrifugally to the internal surface of the cylinder and kept in suspension by the vibration. The denser (i.e. higher specific gravity) particles in the slurry tend to move preferentially radially outwardly (centrifugally) and to move downwardly in the boundary layer (under Earth's gravity). The action of the washing water B is to displace waste accidentally entrained with the higher-specific-gravity-particles.The valuable higher-specific-gravity particles overflow downwardly continuously at C and are collected.

Abstract: The present invention is directed to an improved valve comprising a valve housing, a fluid path therethrough, a seat disposed about the fluid path, a rotatable, curved wedge disposed in the fluid path, an actuator for rotating the wedge between its closed and opened positions and a fixed member for displacing the wedge longitudinally toward the seat as it is rotated between its opened and closed positions. Preferably, the seat is biased toward the hemi-wedge. The rotatable, curved wedge has a curved sealing surface for cooperation with the seat. The wedge includes a bore through its thinner end forming a part of the fluid flow path when opened while its thicker end blocks the fluid flow path in the closed position. The sides of the wedge are curved, one side providing a convex sealing surface and the other side providing a concave thrust surface.

Abstract: In computer control of machine tools there is a need to measure the diameters of cylindrical workpieces automatically and preferably without touching the workpiece. For this purpose an inductive proximity sensor is mounted for circular or linear movement along a path adjacent to a cylindrical workpiece and in a plane normal to a radius of the workpiece. A discrete fast Fourier transform (FFT) is carried out on the output of the sensor as it moves along the path and the amplitude of the second ac component of the FFT is an indication of the workpiece diameter. By calibrating with workpieces of different diameters, the said amplitude can be used as a measure of workpiece diameter.

Abstract: Where a signature is to be automatically verified, or data is to be entered into a computer, a special pen is usually employed but this pen is liable to be stolen or vandalized. In the present invention the tip of an ordinary pen presses lined paper on to a transparent plate and modifies internal reflection in the plate at the point of contact. A light source edge-illuminates the plate and light received by a receiver at another edge of the plate varies in intensity as the pen tip crosses the lines. By measuring the intervals between crossing line boundaries information is obtained which can be analyzed for use in signature verification and data entry.

Abstract: In a solid-state laser device having a laser medium, a reflector member has first and second curved portions surrounding first and second reflector axes, respectively, and an extension portion extended from the first and the second curved portions towards a principal surface of the laser medium for defining an internal space together with the curved portions. Within the internal space, first and second lamps are disposed farther from the principal surface than the first and the second reflector axes, respectively, with first and second lamp axes of the first and the second lamps juxtaposed to the reflector axes and an optical axis of the laser medium. Each curved portion has an arcuate internal surface which forms a partially circular cylinder having a center axis as the reflector axis. Alternatively, the arcuate internal surface of each curved portion forms a partially elliptic cylinder having a symmetry axis as the reflector axis and an outside focal line with which the lamp axis substantially coincides.

Abstract: A method for treating vascular disorders or pulmonary disorders associated with smoking in an animal which comprises: adminstering to the animal milk collected from a bovid being maintained in a hyperimmune state, in an amount and for a time sufficient to produce anti arteriosclerotic or antiaging vascular effects or sparing effects on lung tissue.