Abstract: The present invention provides precision machine vise equipment for use in the NC machining of workpieces which improves the efficiency of the operation by making it possible to insert, secure, and machine some plural number of workpieces, such as two, or more preferably, four, in each cycle of machine operation, while causing each of said workpieces to be precisely located with respect to each of three mutually perpendicular datum planes, and without the necessity of having the machinist or machine operator conduct a positioning or squaring operation. This is done by providing, in accordance with the present invention, in the first place, a two-place precision machine vise of the type described in U.S. Pat. No.

Abstract: To make parts requiring machining with the workpiece vise-held in different orientations, there is provided a precision vise having first and second pairs of jaws, each pair having a member which is fixedly located with respect to a reference location. The invention includes use of a particular form of vise for holding two pieces whereby the screw shaft that rotates to open or close the jaws is tensioned during tightening, which improves accuracy by avoiding bending stresses. When used in conjunction with suitable numerical-control equipment, the vise of the invention greatly increases productivity in the machining of product parts of the kind indicated above.

Abstract: It has been found that API Class D sucker rods can be made inexpensively from low-alloy, low-cost steel by following a suitable induction-normalizing process and using a suitable steel to which there has been added 0.07 to 0.15 percent of vanadium.

Abstract: The invention permits a draftsman or student to carry needed materials conveniently for work at various locations and it also can be used to enable such a person to work at one location without investing the money and the space for a bulky drafting table. There is provided a case which encloses the above-mentioned needed materials and also contains a lid-support mechanism which locks at various positions. One exterior surface of the case is a drawing surface, and the lid-support mechanism permits it to be retained, when in use, at a desired angle with respect to the horizontal.

Abstract: A relatively simple device, capable of affording hours of amusement and fascination, comprises a pair of belt-balancing-hook members, each of said members having in a part thereof remote from said hook a bore passing through said member; a first rod member having in the vicinity of one end thereof an enlarged portion, said rod member being of such dimensions as to be snugly received within said bores, and a second rod member having in an end thereof a cavity within which an end of the first rod member may be received.

Abstract: Disclosed is a unitary, disposable panty-type garment with an open crotch portion, intended for use by female patients undergoing gynecological examination. Also disclosed is a method of making such a garment by cutting from a web identical blank pieces which have wider and narrower portions in such manner that wider portions of a first blank are cut from a portion of the web adjacent to the portion from which narrower portions of neighboring blank pieces are cut. This saves material. Also disclosed is a concept of providing, as an article of manufacture, a two-blank portion of web which has adhesive or similar joining means provided at certain seam areas and dart areas, whereby there may be fashioned by the user a garment of appropriate dimensions.

Abstract: A process for recovering and using fines of flux, such as limestone, used in a metallurgical process, such as oxygen steelmaking, is described. The process involves collecting fines from a receiving zone, e.g., with blower and baghouse equipment. The fines so collected are then conveyed, as by a dense-phase conveyor, to a first processing zone containing a first screening means for screening flux material which is to be fed to the process. Material not passing through said first screening means is fed to the metallurgical-process vessel, but fines passed by the first screening means are collected and formed into briquettes. The briquettes are conveyed to a second processing zone which is located above the conveyor which leads from the receiving zone to the first processing zone mentioned above. The second processing zone contains a second screening means and means for storing and releasing to the said conveyor the briquettes or portions thereof which have not passed through said second screening means.

Abstract: It is possible to provide a detergent for use in dishwashing machines which is both completely free of phosphate and is useful at temperatures such as 120.degree. F. (49.degree. C.), by making a mixture containing 30 percent sodium citrate, 20 percent sodium carbonate, 1-6 percent of chlorinated cyanurate, 20-40 percent of sodium metasilicate, 1 to 9 percent of nonionic surfactant of a kind disclosed herein; and the remainder of fillers, such as sodium sulfate and/or sodium chloride.

Abstract: Compositions based upon monoammonium phosphate and/or diammonium phosphate together with monoethanolamine and/or diethanolamine are used to provide a flame-retardant finish to synthetic fabrics or synthetic-cotton blends. Good flame-retardant protection is obtained with a dry add-on of approximately 13 to 15 percent, and the fabric retains a good hand.

Abstract: There is made a dentifrice containing a cationic anti-decay agent plus, to provide adequate foaming properties without an unpleasant taste, a nonionic surfactant which is an ethoxylated adduct of C.sub.15 or C.sub.16 fatty alcohol in which EO units account for 50 to 75 percent of the molecular weight of the adduct.

Abstract: Deposits of alkali metal ions such as calcium and magnesium on chlor-alkali cathodes and diaphragms are removed by feeding an acid such as hydrochloric acid into the cathode feed in an amount sufficient to reduce the pH below 8 for a time sufficient to remove these deposits and restore the cell to normal operation. The use of this invention allows one to use relatively high hardness water as the cathode feed solution during normal operation of a membrane chlor-alkali cell.

Abstract: Excellent liquid laundry-detergent compositions are obtained by combining (1) alkanolamine, (2) nonionic surfactant, (3) sodium carboxymethylcellulose, (4) fabric brightener(s), (5) solvent, and (6) water. The preferred compositions of the invention also usually contain optional ingredients, such as dyes and perfumes. The alkanolamines promote the action of the nonionic surfactants. Moreover, it is desirable to use some triethanolamine for its stabilizing effect. The mixture of alkanolamine and nonionic surfactants is compatible with sodium carboxymethylcellulose, an excellent agent for avoiding redeposition of soil. The compositions according to the invention have good detergent activity when used at temperatures such as 49 to 60 degrees Centigrade. They afford a liquid laundry detergent which is at least as active, pound for pound, as powder laundry detergents now in common use.

Abstract: A process for making alkali hydroxide and chlorine in a plurality of electrolytic cells of the amalgam type, wherein a decomposer is provided for each cell and wherein alkali metal amalgam formed in the cell is reacted with water in a companion decomposer to form alkali hydroxide, the improvement comprising utilizing for each cell and corresponding decomposer a condenser and a separator component between the condenser and decomposer in the hydrogen outlet line of the decomposer to separate mercury vapor and water vapor initially liquefied in the condenser and divert the condensed mercury back into the decomposer.

Abstract: Initial cell voltages are reduced by decreasing the resistance of the diaphragm through a degassing procedure prior to or at installation thereof. This degassing procedure involves subjecting the diaphragm to subatmospheric pressure while contacting the diaphragm with electrolyte, said electrolyte being an aqueous saline solution having a surface active agent therein in an amount sufficient to reduce the surface tension below the critical surface tension for wetting the fibers, and increasing the pressure to atmospheric or cell working pressure to force electrolyte solution into the interstices of the diaphragm.

Abstract: Polyurethane elastomers of improved heat stability are made by a process in which a polyisocyanate is reacted with a polyol of high molecular weight with an OH:NCO ratio of 1:0.66 to 1:0.85, and the resulting adduct is later reacted with an excess of symmetrical diisocyanate and a diol as chain extender.

Abstract: Fibers about micron size in cross-section of certain fluorine-containing polymers can be treated after being deposited as a diaphragm, either during operation or separately before installation, so that they develop a 0.25-millimeter-thick ply on either side of a central body which is substantially different in chemical composition. This yields a diaphragm 1 to 5 millimeters thick which has a Mullen burst strength approximately three to five times greater than that of an untreated diaphragm (20-25 pounds per square inch versus 5 to 7 pounds per square inch) and a remarkably improved service life in the treated diaphragm (200 days and up) in comparison with such untreated diaphragm (30 days or less). Use of a polymer based upon a major proportion of chlorotrifluoroethylene appears to be required. This discovery is economically significant, in that it is an essential element in the technology of the replacement of asbestos diaphragms now used with a synthetic material.

Abstract: A spotting-agent composition for use in laundering garments is provided which consists essentially of a solution of (1) about 10 weight percent or more of a nonionic surfactant produced by reacting a mixture of fatty alcohols containing 10 to 18 carbon atoms (with the proviso that the proportion of such alcohols which is attributable to alcohols containing 17 or more carbon atoms is limited to about 20 percent by weight) with mixed lower-alkylene oxides (ethylene oxide and propylene oxide) to such an extent as to have the mixed oxides comprise about 57 to 68 weight percent of the total fatty alcohol plus alkylene oxides used, with the proportion of ethylene oxide in the mixed oxides used being about 50 to 70%, in (2) an isoparaffinic solvent made of a mixture of isoparaffins containing about 11 to 14 carbon atoms.

Abstract: Expandable-polystyrene beads suitable for use in making impervious containers are made from a recipe including styrene, free-radical initiator and polyvinyl pyrrolidone, and this practice includes a step of washing the beads in a warm aqueous solution to which an alkoxylated nonionic surfactant having 70-90 percent of its molecular weight accounted for by oxyethylene units is added in an amount effective to cause the washing to remove contaminating grafted polyvinyl pyrrolidone from the surface of the beads and cause them to become expandable into impervious product containers.

Abstract: The output of an oil well is improved by supplying thereto an acidizing-gel composition which consists essentially of, for example, about 15 weight percent of hydrochloric acid, about 20 weight percent of a suitable nonionic gel-forming surfactant containing oxyethylene and oxypropylene units, a corrosion inhibitor to the extent needed, and the balance water. The polymer is of high molecular weight, and though the composition containing such polymer is fluid at the temperature prevailing at the surface, nevertheless it forms a gel at the relatively higher temperatures present in the oil-bearing rock formation under the ground. This makes it possible to exert increased pressure on the oil-bearing rock formation, and it contributes to the effectiveness of the acidizing treatment.

Abstract: A free-radical prepolymer, disclosed in U.S. Pat. No. 3,873,417 as being a dispersant, when added at 10 to 500 parts per million to a reaction mixture in which raw tall oil soap is acidulated to obtain tall oil, is found to act as a separating agent and increase the quantity of tall oil recovered.