Abstract: The apparatus comprises a cabinet for holding a stack of color-coded screen units for use in applying ink through a numeral stencil onto a garment. Stationary screen-supporting structure is provided for receiving each screen unit to be used and positioning and holding it in the same single operative location. More particularly, the screen-supporting structure and the screen unit have cooperating registration structure. A platen is provided for supporting the garment. The platen is linearly and laterally manually movable between central and left and right offset printing positions. Thus the garment may be positioned so that ink may be applied through the stencil onto the appropriate location on the garment. Registration structure is provided to control the positioning of the platen, to enable the user to accurately position the platen at one of the three printing positions for a numeral of a particular size.

Abstract: A downhole pump is actuated by a reciprocating unit comprising a tubular rod string, a valve assembly, and a tubular plunger rod. A flow passage extends through the reciprocating unit when the valve assembly is in an "open" position, whereby liquid may be injected into the pump barrel chamber to ensure the presence of incompressible fluid in the chamber from the beginning of the up stroke, to thereby reduce or eliminate gas locking of the pump. The valve assembly, which moves together with the reciprocating unit of which it is part, is adapted to interact with a stop member on the stationary pump barrel, to initiate opening of the valve as the rod string approaches the bottom of its stroke. The valve assembly is further adapted to automatically close when lifted away from the stop shortly after the beginning of the up stroke. The valve thus remains open only during the bottoming out phase of the stroke, when only limited travel of the reciprocating unit occurs.

Abstract: The present invention provides an apparatus and method for establishing a measure of the modulus of elasticity of a wood panel. The apparatus comprises a support frame having a triangular array of panel support points provided thereon. A load cell, in combination with one support point, is interconnected to a frequency counter. This assembly is functional to determine the weight and vibration frequency of a dropped panel. A panel lifting assembly is provided to raise and drop the panel, thereby causing it to vibrate at its natural frequency. In a process aspect, the invention involves supporting the panel at three triangularly arranged support points, raising the panel at the apex end, and dropping the panel to cause it to vibrate at its resonant frequency, and computing a measure of stiffness from the measurements made.

Abstract: The flat-plate type wind turbine rotor blade comprises a rigid spoke having a single thin flexiblie skin associated therewith. The skin is formed to provide a delta-wing and a flap extension. The delta-wing and the flap extension are angularly disposed at about 25.degree. to each other. The spoke lies along the junction of the delta-wing and the flap extension. A substantially rigid peripheral member extends along the margin of the skin. The peripheral member and the spoke are joined to provide a frame to which the skin is secured. Arrays of parallel reinforcing rib members extend between the spoke and the peripheral member. These rib members are mounted on the pressure surface of the skin. The ribs on the delta-wing are positioned at an angle of about 60.degree. from the axis of the spoke; the ribs on the flap extension are positioned at an angle of about 75.degree. from said axis. They therefore coincide with the main flow paths of the air flow over the blade surface.

Abstract: A process for selectively converting methane to ethylene and hydrogen is provided. Methane is brought into contact with a metal powder catalyst and subjected to a pulse train of microwave radiation for a sufficient period of time to effect conversion thereof. The reaction products are recovered.

Abstract: A physical exerciser is provided which utilizes a pair of compression springs. The springs are maintained in a spaced apart, parallel, side-by-side, straight state by an assembly comprising an inner guide member and an outer tube circumscribing said member. The springs extend longitudinally in troughs formed in the peripheral surface of the elongate guide member. The troughs extend parallel to the longitudinal axis of the tube. The tube holds the springs in place in the troughs. The assembly further provides a stop at one end of each spring, to fix that end against displacement. A pair of tubular handles are mounted on the tube, one at each of the tube's ends. Each handle includes a pin extending transversely across the free end of one of the springs. Suitable slots are provided in each end of the guide member and tube, so as to allow the handles to slide inwardly, each such handle acting to compress one of the springs.

Abstract: There is provided a back pack having an internal frame consisting of a T-shaped stay having its vertical member centrally positioned to overlie the user's spine. A load-transmitting, flexible, one-point connector extends between the pack bag, at the lower terminus of the frame, and the central rear segment of the hip belt. Stabilizer straps are provided to limit the movement of the pack bag. The one-point flexible connector permits of universal relative movement between the hip belt and the frame and associated pack bag, thereby providing a high level of capacity in the back pack to accommodate the movements of the user.

Abstract: A fluid communication channel is developed between injection and product wells in a heavy oil formation by simultaneously injecting a solvent for the oil and passing electric current through the formation.

Abstract: A process is provided for producing oxalyl chloride by first photochemically chlorinating ethylene carbonate to form tetrachloroethylene carbonate and hydrogen chloride and then decomposing the tetrachloroethylene carbonate to oxalyl chloride and phosgene. The chlorination reaction is performed in a reaction vessel having an illuminated side arm conduit of narrow cross-sectional area. Chlorine is introduced at the base of the conduit and together with the hydrogen chloride evolved in the reaction continuously circulates the ethylene carbonate-chlorine reaction mixture through the narrow reaction zone within the conduit. The temperature of the ethylene carbonate-chlorine reaction mixture is controlled in the range of 70.degree. to 100.degree. C., preferably in the range of 79.degree. to 81.degree. C. The tetrachloroethylene carbonate is decomposed by heating same with a catalytic amount of a tertiary amine or amide.

Abstract: A composition is provided for washing fabric, particularly denim, prior to sale. The composition includes an amphoteric surfactant, a builder which ensures that the surfactant in a washing solution, is initially in an anionic state, and a pH builder which causes the pH of the washing solution to decrease to thereby change the amphoteric surfactant to its cationic state. In its anionic state the surfactant acts as a wetting agent to encourage such actions as pre-shrinking and dye-bleeding by the washing solution. In its cationic state the surfactant can be adsorbed onto the fabric so as to exhibit fabric softening and anti-static effects. A lubricant is preferably included in the composition to reduce uneven dye-bleeding caused by fabric to fabric abrasion in the wash cycle.

Abstract: O-acetylated glycals react with ceric ammonium nitrate in the presence of sodium azide to provide, in good yield, O-acetylated 2-azido-2-deoxy glycosyl nitrates. These nitrates can be used to prepare 2-amino-2-deoxy sugars, such as D-galactosamine and lactosamine. The O-acetylated 2-azido-2-deoxy glycosyl nitrates can alternately be converted to O-acetylated 2-azido-2-deoxy glycosyl halides which are useful in the preparation of O-acetylated 2-azido-2-deoxy glycosides, which in turn can be reduced to 2-amino-2-deoxy glycosides. Of particular interest are the syntheses of 2-amino-2-deoxy glycosides which correspond to the terminal units of the antigenic determinant for the human A blood group. Attachment of these glycosides to a solid support provides immunoabsorbents which efficiently and preferentially absorb anti-A antibodies from blood plasma.

Abstract: Whole tailings are treated with a flocculant to cause fines to agglomerate with the coarse particles. The product is then vacuum filtered to separate the fines from the water.

Abstract: The guillotine on a conventional cutter assembly used in conjunction with an eavestrough-forming machine has been modified to produce compacted cut-offs and to prevent jamming of the cutter assembly.A radius is formed in the upper end of each cutting edge of a V-shaped blade. In a preferred embodiment a second, more steeply inclined portion connected at its top end to the radius is provided along each cutting edge.