Abstract: Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and trans 1,2-dichloroethylene with methanl or ethanol, the azeotropic mixtures being useful in solvent cleaning applications.

Abstract: A process for preparing X-ray intensifying M' monoclinic tantalate phosphors by firing precursor oxides in a novel flux mixture containing a compound capable of producing an alkali metal oxide and an effective amount of an alkali metal metasilicate. Tantalate phosphors made in this manner have improved efficiency and purity. X-ray intensifying screens made from these phosphors have improved speed and can be used with good results with a plurality of X-ray film elements.

Abstract: More whiteness, especially for nylon fibers, is retained when a finish is used to provide to the fiber surface an effective amount of a phenyl phosphinate. Potassium phenyl phosphinate, in amounts as small as 0.005% to 0.3% by weight of the fiber, is particularly effective.

Abstract: A coating composition which cures at ambient temperatures and contains 20-80% by weight of a binder and 80-20% by weight of a solvent for the binder, wherein the binder contains about:A. an acrylic polymer A of polymerized monomers of methyl methacrylate and monomers of styrene, alkyl methacrylate and/or alkyl acrylate each having 2-12 carbon atoms in the alkyl group and said polymer having pending from the polymer backbone aminoester groups, hydroxy aminoester groups or hydroxyamine groups,B. an acrylic crosslinking polymer B of polymerized monomers of at least 3% by weight, based on the weight of the crosslinking polymer, of a glycidyl constituent of glycidyl methacrylate or acrylate and the remainder of the monomers are alkyl methacrylate an acrylate each having 1-12 carbon atoms in the alkyl group and optionally contains at least 3% by weight, based on the weight of the crosslinking polymer, of an alkyl methacrylate or acrylate having a pendent group of the formula ##STR1## C.

Abstract: A process for the preparation of the optically active compound [IR-(1.alpha., 2.beta., 3.alpha.)]-2-amino-9-[2,3-bis(hydroxymethyl)cyclobutyl]-6H-purin-6-one, represented by the formula: ##STR1## and novel intermediates are described.

Abstract: The invention relates to a process for stripping, from the surface of a support, a layer of paint which has been formed and hardened thereon, characterized by the requirement of a phase of pre-treating said support before the formation on the latter of the layer of paint to be stripped, said treatment consisting in applying on the support a covering product, selected among the following products: a pre-treatment vinyl resin paint, a polyurethane resin paint. It is also an object of the invention to provide products and compositions to be used in said process.

Abstract: An absolute measuring scale system comprising a scale which extends along a measuring length, and a measuring head which is movable relative to the scale. The system further includes a fine-measurement sensor which is intended to measure the absolute values within each of a multiple of intervals lying sequentially along the scale, and a coarse-measurement sensor intended to measure the absolute values with regard to the interval within which the fine-measurement sensor is located at that moment. The invention is characterized in that the scale (2) comprises a carrier made of a transparent and form-stable material, preferably glass, which has provided on its surface an outer coating or layer which forms an opaque pattern (3, 4). The pattern formed along the length of the scale (2) forms transparent, mutually parallel binary code tracks (12), preferably in accordance with the so-called Grey-code.

Abstract: An improved process for separating and removing non-condensible gaseous contaminants (e.g., nitrogen, oxygen and the like) from a conventional halocarbon vapor compression refrigeration system by withdrawing a vapor stream above liquified refrigerant exiting the condenser on the high pressure side of the expansion valve and then processing this vapor by use of a second compression step, followed by condensation into a receiver. The liquid halocarbon from the receiver is returned to the evaporator while the vapor phase is sent to a semipermeable membrane separation unit. The halocarbon enriched effluent from the semipermeable membrane unit is recycled to the inlet side of the second compressor while the non-condensible contaminant enriched stream is vented from the refrigeration system. Such a high pressure purge loop is useful in selectively removing non-condensible gaseous with minimum halocarbon refrigerant loss.

Abstract: An exhaust gas depurator having a catalytic activity, for internal combusn engines, further acting as discharge silencer, which comprises in combination two elements having a catalytic activity, and a substantially non-dissipative noise silencer interposed between the two catalytic elements. Each element having a catalytic activity is formed by a strip of metal sheet covered by a catalytically active material and wound to a spiral, and each strip has a number of drawn projections, inclined with respect to the longitudinal and the transverse directions of the strip, which act as spacers among the winding coils of the strip and act as baffles for the exhaust gas flow. Some openings are provided for in the strips. The non-dissipative silencer element is formed by a number of annular disks wherein tapered chambers are drawn, and the disks are coupled two by two and then the couples of disks are superimposed.

Abstract: Incorporation into polyacetal molding compositions stabilized for processing with a non-meltable polymer stabilizer of 0.01-1.00 weight percent of at least one meltable co-stabilizer, said co-stabilizer being a thermal stabilizer for polyacetal, and 0.02-1.0 weight percent of at least one primary antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.

Abstract: A flexible image converter may be used for many different applications and may be equipped to condition or alter the converted image. An image of an object is converted to an electrical signal, and digitalized. If desired, conditioning operations are performed on the digitalized image. The conditioned digitalized image may then be converted back to an analog image signal. The analog image signal is then displayed on a spatial light modulator. The image displayed on the spatial light modulator is then superimposed on an electromagnetic radiation beam to obtain the converted image representation of the object.

Abstract: A device for measuring the thickness of a wet or dry paint film applied on a substrate without contacting the film is disclosed. The device uses an ultrasonic sensor positioned adjacent to an inductive eddy-current proximity sensor where the ultrasonic sensor measures the distance between the device and the upper surface of the paint film and the proximity sensor measures the distance between the device and the upper surface of the substrate. The two distances measured, when compared, produce the film thickness value. The device is capable of accurately measuring thickness of various paint films, such as flat, glossy and metal-flake containing paint films.

Abstract: An optical waveguide device adaptable to be coupled with a similar optical waveguide device through commensurate slots on the devices, the slots guiding the ends of the respective waveguides into contact with each other, and into properly aligned optical coupling.

Abstract: A cleaning composition is disclosed which is suitable for cleaning flux residue from a printed circuit board and comprises dibasic ester solvent, a hydrocarbon solvent and a compatibilizing component.

Abstract: In a drilling device, a holder is provided that is displaceable with respect to a foot in a feed direction. A drilling machine tool is carried by the holder. An electromotor provides a feed drive for driving the holder in the feed direction. The drilling machine tool and/or the holder are displaceable relative to the feed drive in an opposite direction to the feed direction by overcoming a counterforce. A switching element monitors the relative displacement and enables a signal to be derived for stopping the feed drive if a predetermined value of counterforce is exceeded. Motor current is limited to a predetermined maximum value during operation of the device.

Abstract: A polyimide coating composition comprising an homogeneous liquid solution of (a) a polyimide or polyimide precursor, (b) a substituted silane compound and (c) aprotic solvent.

Abstract: A method is provided for slowing the progression of atherosclerosis in coronary arteries in hypertensive or normotensive patients and reducing or eliminating atherosclerotic lesions in such patients in a mammalian species by administering an ACE inhibitor, especially one containing a mercapto moiety, such as captopril or zofenopril.

Abstract: The azeotrope of 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether is useful as a refrigerant, aerosol propellant and polymer foam blowing agent.

Abstract: Novel compounds are disclosed having the formula ##STR1## and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are as defined herein. These compounds are useful, for example, as cardiovascular agents and especially as anti-ischemic agents.

Abstract: A method of purifying hydrolyzed protein compositions by contact with a substantially phase-incompatible fluid extractant is provided. A reduction in the concentration of chlorohydrins, measured as 3-monochloro-1,2-propanediol, in hydrolyzed protein compositions can be obrtained by contacting the hydrolyzed protein composition with such a phase-incompatible fluid extractant, e.g., ethyl acetate. The method allows removal of chlorohydrins without substantially affecting the organoleptic qualities of the hydrolyzed protein.