Abstract: A method and an apparatus are provided for blow-molding hollow articles. The blow-molding apparatus includes a carrousel mounted to rotate within a support frame. The carrousel carries four molds around a circular mold path. Two blow-molding work stations are disposed next to the mold path in fixed positions relative to the frame. The carrousel is indexed to cause each mold to pause by each work station one time during each carrousel revolution. The molds pause by each work station to allow blow-molding operations to be performed in conjunction with each mold at each work station. At one blow-molding work station, located at the 12:00 position of the mold path, an extruder injects parison into each mold. At the other work station, located in the 9:00 position of the mold path, a take-out mechanism extracts blow molded articles from the molds. The carrousel is additionally indexed, i.e.

Abstract: A wire drawing die having improved physical properties, and a blank therefor. A cemented metal carbide support component having a lengthwise extent is provided to extend radially about a central longitudinal axis to define an internal bore therethrough. For receiving the wire to be drawn through an internal thereof, a sintered polycrystalline compact component is received within the bore of the support component. The compact component is bonded to the support component at an interface surface extending along the longitudinal axis from a first end spaced a first local maximum radial distance from the axis to a second end spaced a second local maximum radial distance from the axis. The interface surface is radially symmetrical about the longitudinal axis and extends radially inwardly from the first and the second end to define an intermediate region therebetween spaced a local minimum radial distance from the axis.

Abstract: A maintenance vehicle and associated method for measuring and correcting the level of a railroad track in a single pass. An instrument carriage, or frog, is towed by and in fixed relationship to the maintenance vehicle. The frog carries at least one inclinometer to measure at least one of longitudinal level and crossfall. As the vehicle periodically stops to work the track e.g. tamping or stoneblowing), the inclinometers are provided with the settling time necessary for accurate readings. In an additionally disclosed method, the track is measured and modeled prior to working using a primary measurement system and is then measured and modeled a second time while the track is worked using the frog.

Abstract: The present invention is directed to polycrystalline diamond and cubic boron nitride (CBN) composite compacts and a method of making the same under high temperature/high pressure (HP/HT) processing conditions, and more particularly to HP/HT polycrystalline composite compacts having reduced abrasive layer stresses. The method of the invention involves making a metal carbide supported polycrystalline composite compact under conditions of high pressure and high temperature (HP/HT) in an HP/HT apparatus by the following steps:(a) placing within an enclosure a mass of abrasive particles, a first mass of metal carbide support material adjacent said abrasive particles, and a second mass of metal carbide support material adjacent said first mass with a layer of brazing filler alloy having a liquidus above about 700.degree. C.

Abstract: An abrasive tool insert comprises a cemented substrate and a polycrystalline diamond layer formed thereon by high pressure, high temperature processing. The interface between the substrate and the diamond layer comprises at least one angled profile wherein said profile slopes downwardly and outwardly toward the periphery of the insert.

Abstract: Disclosed is an abrasive tool insert having an abrasive particle layer having an upper surface, an outer periphery, and a lower surface integrally formed on a substrate which defines an interface therebetween. The abrasive particle layer outer periphery forms a cutting plane. The thickness of the abrasive particle layer at its outer periphery cutting plane decreases radially inwardly. Thus, the interface can have a sawtooth shape cross-sectional profile, at least one slot extending from said abrasive particle layer outer periphery radially inwardly, or other configuration based on the precepts of the present invention. Also, the angle of the outwardly sloping profile can be matched to the anticipated angle of the wear plane which will develop as the PDC wears in use.

Abstract: An abrasive tool insert comprises a cemented metallic substrate and a polycrystalline diamond layer formed thereon by high pressure, high temperature processing. The interface between the substrate and the diamond layer forms a sawtooth shaped cross-sectional profile including a number of surfaces sloping outwardly and downwardly toward a cutting edge of the insert.

Abstract: A self-clearing material sensing apparatus is provided for sensing a physical parameter of a particulate material flowing through a conduit. The self-clearing material sensing apparatus includes a sensor device and funnel for directing a consistent flow of the particulate material to an area proximate the sensor device. The funnel has a read configuration and a clearance configuration and includes an upper inlet and a lower outlet including a narrowing below the upper inlet when the funnel is in the read configuration. The narrowing is adjustable for increasing the cross-sectional area of the narrowing when the funnel is changed from the read configuration to the clearance configuration. An actuation mechanism is provided for changing the funnel from the read configuration to the clearance configuration, and from the clearance configuration back to the read configuration, to periodically release any material clogged within the funnel.

Abstract: An apparatus is provided to thermally control a section of engine casing by flowing heat transfer fluid within an axially disposed set of circular flowpaths within a section of engine casing or flange such as a thermal control ring. Flowpaths are preferably arranged in alternating counterflowing directions in the ring such that there is substantially no circumferential gradient in the mass flowrate weighted average temperature of the heat transfer fluid supplied by any two adjacent counterflowing fluid flowpaths. Each flowpath may have two or more circuits having inlets and outlets for flowing the heat transfer fluid.

Abstract: A method of producing a work surface by producing a reference plane 2--2 and traversing a working tool 104 in a direction generally parallel to said reference plane. So that the required work surface can be a surface other than of flat planar form, the distance of the working tool 104 from the reference plane 2--2 is varied in accordance with instructions from a computer 120 in response to a measure of distance travelled.

Abstract: A process is provided to produce, stabilize, dedust and upgrade synthetic oil, such as shale oil. In the process, synthetic fuels, such as oil shale, tar sands and diatomite are retorted with heat carrier material to liberate an effluent product stream comprising hydrocarbons and entrained particulates of dust. In order to minimize polymerization of the product stream and agglomerate the dust, the product stream is stabilized, upgraded, and pretreated prior to dedusting, in a hydroprocessor, such as an ebullated bed reactor, with a hydroprocessing gas in the presence of a catalyst. The hydroprocessing gas can be hydrogen, scrubbed fractionator gases, or hydrocarbon-enriched hydroprocessor off gases.

Abstract: This invention relates to a process for preparing transparent iron oxide pigment dispersions. The dispersions are prepared by milling a mixture of iron oxide pigment and a liquid vehicle in a bead mill containing glass beads as the grinding media. The pigment dispersions can be used in the preparation of paints and coatings which exhibit transparent quality and absorb ultraviolet radiation.

Abstract: This invention relates to a method for producing a pigment-organic vehicle product, commonly referred to as "flush" by those versed in the art, which comprises forcing a pigment-containing aqueous pulp-organic vehicle mixture through a chamber comprising a set of at least two adjoining partial cylindrical surfaces, said chamber having defined at one end thereof at least one axial opening and at least one second opening spaced from the axial opening. The mixture is forced through the chamber and axial opening by a set of at least two rotating helical surfaces whereby the product is extruded through the axial openings. The water exits from the chamber through the second opening or openings.

Abstract: Disclosed is a bipolar transistor comprising a semiconductor body having first and second opposed surfaces with opposing edge surfaces and emitter, base and collector regions in the body with an emitter-base junction between the emitter and base regions and a base-collector junction between the base and collector regions. The emitter-base junction extends across the semiconductor body and terminates at the edge surfaces such that injection across the emitter-base junction is substantially uniform across the semiconductor body. In one arrangement, two collector regions are provided, one of which is coupled to the base contact in order to control the gain of the transistor.