Abstract: A double-containment pipe fitting and system for joining sections of double-containment pipe includes an outer containment housing, an inner carrier housing, and a plurality of restraining devices. The containment housing has a plurality of open ends. Each open end is constructed to securely connect to an open end of a containment pipe. the carrier housing has a plulrality of open ends constructed and arranged for positioning within the containment housing. Each open end of the carrier housing is constructed to securely connect to an open end of a carrier pipe. One restraining device is provided for each open end of the containment housing. The restraining device securely fastens the carrier housing to the containment housing and thereby restrains expansion and contraction of the carrier pipe and containment pipe. The carrier pipe and containment pipe are otherwise unrestrained against expansion and contraction.

Abstract: Olefins are polymerized using, as a catalyst, a pi-olefin complex of a transition metal supported on aluminophosphate. The most effective complexes are cycloheptatrienyl-(1,3-cycloheptadiene)chromium(-1) compounds and alkyl-substituted derivatives thereof. A metal alkyl co-catalyst, such as triethylborane or triethylaluminum, can also be present. The catalyst is best suited for forming ethylene polymers and copolymers. Both the polymerization process using the described catalyst, and the catalyst system, per se, constitute different aspects of the invention.

Abstract: A composition comprises poly(arylene sulfide), fiberglass, an additive containing an element selected from among the group consisting of alkaline earth metals, magnesium and beryllium; and silica present in an amount sufficient to increase the shear sensitivity of the composition so that the composition does not drool during molding. A method for providing a composition having reduced drool during molding comprises admixing with a composition containing poly(arylene sulfide) and fiberglass an amount of silica sufficient to increase shear sensitivity of the composition so that the composition has reduced drool during molding.

Abstract: An improved radiant gas burner which includes a refractory burner tile hag an elongated passageway extending therethrough and a fuel-air mixture burner tube disposed within the passageway. The burner tube is of a one-piece elongated construction, includes a nozzle portion at the interior end of the passageway and is connected to means for introducing fuel gas and air therein by a threaded connection positioned adjacent the exterior end of the passageway. Secondary fuel is discharged from the passageway at a location adjacent the nozzle portion of the burner tube. An improved method of burning fuel gas and air using a radiant gas burner is also provided.

Abstract: The present invention relates to glass filled poly(arylene sulfide) molding compositions which upon being molded result in products having improved mechanical properties. Methods of preparing the compositions, methods of using the compositions to form molded products and the molded products so produced are also provided. The compositions are comprised of poly(arylene sulfide) resin, glass reinforcement material, an epoxysilane and an organic phosphite.

Abstract: A jig-type fishing lure which includes a jig head having a portion of a hook shank embedded therein. The hook extends rearwardly from the jig head through a curved bight portion to a barb, and the lure further includes a bore or passageway extending through the jig head parallel to the hook shank in the upper portion of the jig head. A flexible retrieving line is extended through the bore so that one end of this line can be secured around the shank of the hook immediately rearwardly from the jig head. The line emerges from the bore through the jig head at its forward end. Deflecting bristles extend from one side of the jig head toward the barb of the hook and function to enable the lure to more effectively traverse weeds and other obstructions without fouling.

Abstract: A method for making fiberglass articles includes steps for forming fiberglass sections each having a smooth and an unfinished surface and a raised portion, placing unfinished surfaces wet with bonding agent in contact, thus defining a hollow interior channel adjacent to the raised portion, and evacuating the hollow interior channel to compressively hold the sections together while the fiberglass cures to form a single, integral fiberglass part having a smooth finish on all surfaces.

Abstract: A dual blade cutter head for a rotary cutting tool which consists of two identical blades disposed in opposed position, each blade having an outer arcuate edge movable into cutting contact and having suitable hard facing affixed to the arcuate edge oriented for right-turn cutting rotation. In one form the hardface is an arcuate inlay block faced with thermally stable polycrystalline diamond.

Abstract: The present invention provides: a novel poly(arylene sulfide) (PAS) composition having an increased comparative tracking index (CTI) rating; a novel method wherein the inventive composition is formed and molded to produce a useful article; a novel article produced by the inventive molding method; a novel method wherein the inventive composition is formed and used to encapsulate an article; and a novel encapsulated article produced by the inventive encapsulation method. The inventive PAS composition comprises: poly(arylene sulfide) resin; talc; and an amount of hindered phenol sufficient to increase the composition's CTI rating.

Abstract: A process for producing micropellets of lightweight aggregate having a substantially spheroidal configuration which includes continuously mixing ceramic clay and liquid in a high speed rotating pin mixer to encapsulate substantially all other non-volatile inorganic solid materials present in micropellets having a diameter not exceeding about six mesh. The spheroidal micropellets are then fired at a temperature of at least 2,000.degree. F. to oxidize all volatile organic compounds present. The lightweight aggregate of micropellets can advantageously be used to replace sand in a cement or concrete matrix, as a well as for numerous other uses.

Abstract: An improved fabric container for controlling the root growth of nursery stock planted in the ground prior to transplant is provided. The improved fabric container is formed of a porous, needle-punched, continuous fiber fabric that maintains root growth in the ground such that roots are readily caught and caused to initially penetrate the container, but the fabric functions to constrict the roots sufficiently to produce nodule formation and root branching within the confines of the container.

Abstract: An improved scored reverse buckling rupture disk assembly is provided. The assembly includes a reverse buckling rupture disk having one or more scores on a surface thereof forming lines of weakness which define a blow-out portion connected by a hinge area in the rupture disk. An annular rupture disk support member is positioned adjacent the concave side of the rupture disk, and a supporting member for preventing the blow-out portion from fragmenting or tearing away from the rupture disk at the hinge thereof is disposed within the concave recess in the rupture disk.

Abstract: Drilling mud is rapidly decomposed by admixing one or more enzymes with the mud to selectively degrade one or more polymeric organic viscosifiers therein. A method of cleaning up a well site drilling mud pit containing drilling mud is provided. Also provided are a composition and method of removing residual drilling mud from a wellbore and around the well face.

Abstract: A device for storage and display of photographs consisting of a housing with front frame and a spindle containing photo envelopes supported mid-way across the front frame. The spindle is formed in unique manner to carry a large plurality of photo envelopes by heat welding each envelope to the spindle in close spacing. Each envelope contains two photos back-to-back, and rotation, either manually or motor controlled, indexes intermittent display of the successive photos with two photos always in view in the frame.

Abstract: A paddle-fish landing net combination which includes a hollow paddle-shaped housing having a handle opening in an upper side thereof, and a net opening in its opposite, lower side. An elongated handle extends slidably through the handle opening and has an inner end inside the housing. A fish landing net is attached to the handle inner end and nests within the housing when the handle is fully extended upwardly from the housing. The fish landing net moves into an expanded, fish netting position outside the housing when the handle is slidingly pushed into the housing.

Abstract: A window polishing stand for securely receiving and holding selected ones of a class of aircraft window panels during a polishing operation. The stand consists of a planar panel member having a generally oval hole cut centrally therein and having at least three short legs supporting about the periphery to allow clearance beneath the panel member. A quadrature array of felt pads are then included around the edge of the oval hole for padding purposes and clamping assemblies are provided on opposite sides in line with the minor axis of the oval hole thereby to provide secure positioning of the aircraft window with either the concave or convex side directed downward.

Abstract: An ultra low pressure flow sensor consisting of a support gasket defining a flow way and having a thin, pliable membrane extending thereacross with right angle slits formed totally across the flow way portion. An electrical conductor strip is then bonded across each pair of opposing quadrants of the membrane in continuous connection to an electrical indicator circuit. The conductor strip across each pair of membranes is centrally notched to a preselected depth of cut thereby to adjust the flow pressure break strength.