Abstract: Opaque release sheet comprising a base having a coating comprising a primary release agent in the form of air-containing microcapsular opacifiers which may be used in combination with a minor amount of a secondary release agent, such as silicone-poly-glycol copolymer, a methoxysilane, polyethylene, a metal complex or the like, provide opaque, lightweight, dimensionally stable release sheets.

Abstract: Self-twist plural yarn strands are produced by a system wherein at least two singles yarn strands are individually twisted to form twisted strands each having longitudinally spaced nodes, and strands are brought together in a parallel relationship with the nodes of one strand substantially aligned with the nodes of each other strand. The corresponding nodes from one strand are fastened to those of each other strand, and the strands are allowed to ply. The node fastening means comprises a rotating member having a contact surface for fastening the nodes by gathering and twisting of the fibers from one strand with those of another strand at the nodes of each respective strand. Ply yarn twist uniformity is assured through the use of improved twist insertion jets, together with a means for holding singles yarns separate to allow longitudinal levelling of singles yarn torque prior to plying.

Abstract: Method for agglomerating finely divided particulate solid materials which are capable of agglomerating by intersurface moisture for inter-particle adherence. A mass of the particulate material in a cool atmosphere in an agglomeration zone is simultaneously agitated and subjected to electromagnetic radiation to cause the free moisture contained within the particles to appear in liquid state at the surfaces of the particles so that, with the agitation causing random particle-to-particle contact, agglomeration by inter-particle adherence occurs in the same manner as if extraneous moisture had been introduced. Advantageously, radio frequency energy is employed to accomplish dielectric heating of the moisture within the particle, the moisture escaping to the surface of the particle but persisting there in liquid state because the solid matter of the particle is not heated to a temperature such as to cause unduly rapid vaporization of the moisture.

Abstract: A striking apparatus has a body which carries a tool and which has a cylinder space, a piston structure within the space, and a sleeve-type distributor valve within the cylinder and around the piston. Flow of hydraulic fluid supplied to the body under pressure is controlled by the valve and piston to cause the piston to reciprocate, striking the tool. The sleeve valve has an extension portion which controls flow through a canal in the piston to a valve operating distributor space and limits flow of liquid under pressure to an outlet canal to a relatively short interval in the operating cycle, thereby reducing the amount of liquid wasted.

Abstract: Hydroxyl-containing filler reinforced thermoplastic polymers, such as polyolefins, are disclosed having improved physical properties such as impact strength, break strength and flexural modulus. The filler is compatibilized with a thermoplastic polymer containing labile atoms by mixing the two together in the presence of a coupling agent, such as maleic anhydride and a free radical initiator such as a peroxide catalyst. In a preferred embodiment, clay is coated with polyethylene by mixing the two in the presence of a peroxide catalyst and maleic anhydride and the coated filler is then compounded with additional polyethylene. In another preferred embodiment, a filler is coated with a polyolefin having a high melt index and the coated filler is then compounded with a polyolefin having a lower melt index. Also disclosed are various means for molding the compatibilized composites of this invention.

Abstract: A flexible piping joint in the form of a fluid-tight coupling and sealing apparatus for two tubes having high pressure fluid flowing therethrough, the joint having angular, axial and rotational flexibility and comprising a metallic, resilient annular sealing element on the first tube in an interference fit with the interior surface of the second tube, and a guiding mechanism for maintaining the intersection point of the tubes' centerlines during angular misalignment in the plane containing the line of contact of the sealing element and the interior surface of the second tube.

Abstract: A pressure compensated slide joint for sealing first and second tubes having high pressure fluid flowing therethrough comprising a metallic, resilient sealing element extending from the first tube into an interference fit with the interior surface of the second tube, and an annular chamber, variable lengthwise in the axial direction, formed from two parts, each coupled to one of the tubes and in a slidable, sealing relationship with the other, and which has a vent communicating with the interior of the second tube. The sealing element is formed of a frustoconical portion and a ring portion having a curved outer surface contacting the interior surface of the second tube.

Abstract: A trailer hitch apparatus includes a detachable hitch frame unit mounted to a drawbar on the rear of a tractor. The hitch frame unit includes at its bottom center, a connecting pin adapted to fit into an aperture at the forward end of the trailer tongue, a guide element mounted in front of said hitch rod, and a spring-biased locking device including a locking arm pivotally mounted above the connecting pin. The drawbar is coupled to power means on the tractor for raising and lowering the connecting pin into and out of the trailer tongue aperture to couple and uncouple the trailer and tractor. In its operative position the locking arm engages the top of the trailer tongue while the connecting pin extends through the trailer tongue aperture, thereby preventing accidental disengagement of the trailer tongue. The locking pin arm automatically locks in its operative position when the hitch assembly is raised and automatically unlocks to a release position when the hitch assembly is lowered.

Abstract: Applicant's invention relates to a new and novel concept in underwater cutting of metals and nonmetals. It utilizes a binary metallic system in conjunction with an ionized gaseous cone to provide a continuous cutting action of high temperature, extreme power, and with great intensity.

Abstract: A press roll having a shaft, a cylindrical shell and axially arranged support devices mounted on the shaft to exert radial forces on the shell in opposition to pressing forces to prevent shell distortion. Ducts in the shaft convey fluid under pressure to the support devices each of which includes an annular chamber defined by annular radially extending walls with peripheral axial flanges, an annular compressible and flexible ring and seals to keep the fluid from leaving the chamber. Various embodiments of the annular rings and seals are disclosed. Pivot bearings prestress the system and support the shell on the shaft for relative eccentric rotation.

Abstract: There is disclosed a process for the preparation of the pyrazine precursor of methotrexate or an N-substituted derivative thereof and/or a di(lower)alkyl ester thereof having the formula: ##STR1## wherein R and R' may each be hydrogen or a lower alkyl group, e.g., ethyl. In a preferred embodiment, the process comprises reacting in one step the compounds aminomalononitrile, .beta.-halopyruvaldoxime and a di(lower)alkyl p-methylaminobenzoyl-L-glutamate to form the di(lower)alkyl ester of the pyrazine oxide precursor of methotrexate having the formula: ##STR2## This compound is then treated with either titanium trichloride oriodoformamidinium iodide to deoxygenate the compound. There is also disclosed a process for the preparation of a di(lower)alkyl ester of methotrexate having the formula: ##STR3## by treating the di(lower)alkyl ester of the pyrazine precursor of methotrexate with a guanidine salt of a weak organic acid, e.g., guanidine acetate.

Abstract: A ski brake movable by a ski boot includes a U-shaped spring and lever member connected to pivot rods which extend outwardly beyond the edges of the ski. The spring member is inwardly and outwardly deformable. The bracket includes cam surfaces which deform the arms of the spring member when the boot presses the member downwardly, drawing the rods inwardly and rotating brake arms to positions substantially parallel with and above the bottom surface of the ski. When the boot heel is lifted, the spring lowers the brake arms so that they protrude below the bottom surface of the ski. In another embodiment, the cam surfaces are between the legs of the U, and are oppositely sloped, forcing the legs apart when the boot presses the spring portion to the top surface of the ski. In a further embodiment, each brake arm is provided with a second brake arm portion pivotally connected to the first. Webs can be connected between the two brake arms to further increase the effective braking area.

Abstract: A base fabric for a radar defeating camouflage material comprising a knitted fabric knitted from a plurality of strands to form a stretchable, flexible fabric having a plurality of openings therethrough, each of these strands constituting a spun mixture of noncontinuous polymeric fibers and noncontinuous metal or carbon fibers. The fibers can be nylon or polyester. The metal fibers can be stainless steel. The metal or carbon fibers can comprise about 2 - 10 percent by weight of the spun yarn, the fibers having an average diameter between about 0.008 and 0.02 millimeters and an average length between about 50 millimeters and 90 millimeters.

Abstract: A novelty coin flipping device includes an upstanding tubular member, closed at the top, and having a pivotal operating lever with a coin support pad disposed adjacent the bottom. A coin is positioned within the tubular member and normally rests upon the support pad. When the lever is depressed, the disc is flipped upwardly within the tubular member to gravitationally descend, in either a "heads" or "tails" position, upon the support pad.

Abstract: This invention relates to paper-winding units for use on teleprinters. Known teleprinter paper-winding units will not receive paper of varying widths, and it is an object of the invention to provide a unit which does not suffer from this disadvantage. This object is achieved by winding the paper on a driven shaft mounted in a bearing at one end only. More specifically, the invention comprises an electric motor fixed to a mounting plate and driving a shaft carrying a cardboard roll for the paper which passes over a fixed guide rod, and a control rod mounted on a spring-loaded lever. The lever controls a switch for the electric motor so that the motor is switched on and off automatically in accordance with the tension in the paper.

Abstract: An improved form of battery cable is produced through the use of a battery terminal member which has a copper tube projecting from the end thereof. The multi-strand electrically conductive cable is cut to the desired length, the end is stripped and inserted into the copper tube and the copper tube is crimped into a diamond-shaped crimp to form a substantially solid mass of the cable strands wherein. Then, a plastic sleeve is heat shrunk over the copper tube and a portion of the cable sheath to form a corrosion-free connection.

Abstract: There is disclosed a combination chalk holder and cue slide adapted to be worn as a ring on the player's finger. The device comprises a band adapted to encircle a finger, the band comprising a means to releasably engage a piece of chalk, means to fasten the ends of the band to form a ring around the finger and a strip of material such as felt which serves as a cue slide.

Abstract: Opacifying agents, which may be coated onto or incorporated into paper sheets, consisting essentially of spherical aldehyde condensation polymeric super-particles, each having a spherical, discontinuous shell surrounding a spherical hollow core, said shell composed of agglomerated, discrete spherical aldehyde condensation polymeric secondary particles which are solid throughout. The opacifying agents are incorporated into paper sheets by admixing cellulosic fibers with the super-particles.

Abstract: This invention relates to hinge structures.According to the present invention there is provided a hinged structure comprising a first gear segment, a second gear segment meshing with the first gear segment, and a link pivotally connected to each gear segment, the axes of the gear segments co-inciding with the axes of the pivotal connections between the link and the gear segments.

Abstract: In offshore platforms and the like of the type comprising a structure, such as a hull, and a plurality of upright legs for supporting the structure on the floor of a body of water, the invention provides an improved rack-and-pinion type jacking apparatus for connecting the structure to the legs in vertically adjustable fashion. For each leg, at least one dual rack bar is employed, the rack bar having two opposed sets of rack teeth each extending along a different one of the two edges of the bar. A jacking unit is mounted on the structure adjacent each rack bar and includes at least one pair of drive pinions with the pinions of the pair each meshed with a different one of the two sets of rack teeth, so that the two pinions are opposed across the rack bar. When the legs each comprise a number of tubular column members, one of the dual rack bars is provided for each of a plurality of the column members of each leg.