Abstract: An aboveground reservoir is connected to the space between inner and outer tanks of an underground double-wall storage container for liquids. Leak detecting liquid fills the space between the tanks and extends to a surface level in the reservoir. Sensing means detects a drop in the level of the liquid in the reservoir and activates a signal when a leak develops in either of the inner and outer tanks.

Abstract: A glass fiber binder consisting of a urea-formaldehyde resin, a styrene-butadiene latex copolymer and a fully methylated melamine-formaldehyde copolymer.

Abstract: Fiberizable basalt compositions are disclosed. The fibers are produced from natural basalt rock modified with alkaline earth metal oxides. The fibers can be used to make low density composites for ceiling tile or boards.

Abstract: The air-supported fabric roof structure includes a compression ring, three sets of generally equally spaced parallel cables arranged to define a grid of generally equilateral triangles with each cable having a pair of opposite end portions pivotally connected to the compression ring, a plurality of hexagonal outer roof fabric panels secured to the cables from above and each covering six triangles of the grid, and a plurality of hexagonal inner liner panels secured to the cables from below and each covering six triangles of the grid, the liner panels preferably being staggered or laterally offset from the outer roof panels.

Abstract: An edging compound for ceiling tile comprises a hydroxyethyl cellulose, an acrylic latex, a polypropylene and one or more particulate fillers.

Abstract: Method and apparatus for producing an electrical conductor are provided comprising a doped polymeric material and an encasement means substantially impermeable to the dopant, the encasement means having matching surfaces in contact with the polymeric material to reduce the loss of dopant and an inert gas to occupy any voids between the surfaces.

Abstract: Method and apparatus for controlling a roving winder compares the number of strands of material actually being wound to a number of strands which should be wound into a roving. The controller stops the winding process if the two numbers are not equal. The use of a microprocessor allows not only the comparison but also generation of a control signal and a means to communicate the process information to a host computer.

Abstract: The use of an antistatic agent in the production of blowing wool insulation is disclosed. The antistat is a quanternary ammonium salt which is applied from an aqueous solution. The antistat reduces the tendency of the small fiber particles to dispense during pneumatical application.

Abstract: Bis-stearoylamide is blended into asphalt, either natural or petroleum derived, to reduce the viscosity of the asphalt while maintaining its viscosity and, hence, its saturant properties.

Abstract: The adherence between an asphalt and aggregate is increased by incorporating into the asphalt a vinyl monomer and an alkenyl azabenzene.

Abstract: The present invention proposes a novel apparatus and method for the manufacture of glass fibers utilizing a bushing confining a body of molten glass over an orifice plate which may or may not have depending tips. Interposed in the glass body is a plate or other device for reducing the pressure of the molten glass body over the orifice plate to a pressure no greater than atmospheric pressure. The orifices are of relatively large diameter incapable of imposing a substantial pressure drop on molten glass flowing therethrough. Each tip contains a pool of molten glass at no greater than atmospheric pressure and, during fiber attenuation, a forming cone is drawn from the pool in each tip. The cones are located in the tips, each cone is smaller than the surrounding tip and each cone is stabilized on the interior tip wall by an annular glass portion integral with the cone. The process is dripless, since upon fiber interruption at any given tip, the molten glass pool remains in the tip.

Abstract: Window frames and sashes are molded of fabricated fibrous wool impregnated with a binder and coated with a resin which soaks into the surface to form a strong protective skin.

Abstract: Two halves of a tank are secured together by an external lay-up comprising corrosion-resistant resin. Each tank half includes an outer structural wall and an inner liner, the structural wall comprising corrodible resin, the liner comprising corrosion-resistant resin, the structural wall ending short of the inner end of the tank half, and the liner being radially enlarged at the inner end of the tank half to cover the inner end of the structural wall.

Abstract: This invention pertains to a method to permit the molding of a plurality of plies of polymeric compositions into an integral molded object having a minimum number of internal flaws and, therefore, improved properties. The plies are positioned in contiguous relationship, and the initiation of the polymerization reactions is controlled by selecting catalyst systems which substantially simultaneously initiate polymerization in each of the plies to prevent the development of curing seams at the points of contact between the plies.

Abstract: Method and apparatus are provided for forming glass filaments wherein a transfer guide means is movable between a strand threadup position and a transfer zone immediately adjacent the primary attenuation means, said transfer guide being adapted to move a strand about to be restarted which is being advanced by a secondary attenuation means into contact with the primary attenuation means to be advanced thereby and to release such strand when said transfer guide is at a predetermined zone to permit the transfer of such strand being advanced by the secondary attenuation means to the primary attenuation means in the absence of reducing the speed of the primary attenuation means.

Abstract: A method for reclaiming used asphalt by mixing it with a chemically modifying system consisting of a polymerizable vinyl monomer and an alkenyl azabenzene.

Abstract: A process and apparatus for improving the removal of gaseous inclusions from molten materials is disclosed. The inclusions, e.g., seeds or bubbles, are removed by applying vibrations to a restricted zone for discharging molten material from the melting tank. The seeds are slowed during a "pile up" in the restricted channel and are more easily brought to the surface of the molten material.

Abstract: A mat comprised of at least one layer of highly dispersed continuous glass fiber strands is produced according to defined parameters for use in reinforcing thermoplastic as well as thermosetting materials.

Abstract: The adherence between an asphalt and aggregate is improved by including in the combination styrene and an acrylamide.

Abstract: Apparatus for the rotary production of fibers comprising a flanged rotatable shaft with the spinner positioned on the flange and retained substantially in fixed relationship to the shaft by means of bearing means slideably positionable along the shaft.