Abstract: A drainage tap can be readily fixed in a face-to-face manner to the wall of a plastics drainage bag and is easily operated by a user. The tap has a body and a valve member therein, and the latter is held within the body by engagement of an external rib on the valve member in a slot which extends into a flange of the body.

Abstract: A boat protection device means for protecting the bottom of a boat is disclosed, the device comprising an elongated strip of flexible resilient solid material having a pair of flexible opposed walls diverging upwardly and outwardly from the central longitudinal axis of the strip and an adhesive for securing the opposed walls to the bottom of the boat.

Abstract: Point-bonding and water-jet-softening of a sheet of flash-spun polyethylene plexifilamentary film-fibril strands provide a nonwoven fabric that is particularly suited for use in disposable protective garments. Garments made with the nonwoven fabric are comfortable and provide a good protection against particulate matter, such as air-borne asbestos particles.

Abstract: A process for preparing (polyfluoroalkyl)polyfluoroarenes comprising contacting a polyfluoroalkyl or perfluoroalkylene of specified formulae with a polyfluoroaromatic in the presence of at least one specified metal reagent is disclosed.

Abstract: A novel two-piece wound dressing, providing protection during dressing changes to the delicate healing skin directly surrounding the wound, is provided according to the present invention. The dressing comprises a baseplate having an adhesive surface for contacting surrounding skin, and has an aperture extending completely through it over which a wound pad of a desired wound dressing material can be placed. Means are also provided for attaching the wound pad to the baseplate.

Abstract: A self-service check-out counter for cashier-unattended use and operation includes an laser scanner for automated reading of product identification codes borne by articles to be purchased, a keyboard for manual entry of article-identifying information, a variety of indicators and signalling devices for instructing actions by the customer, devices for preventing pilferage, fraud and inadvertent errors and an integral bag forming apparatus for manufacturing custom-formed bags on-site at the counter and on demand and, preferably, custom-sized to conform to the volume of articles to be packed in the bags. A customer individually scans articles to be purchased and the scanned data is verified through comparison with stored product identifying information. Following verification of each article, customer placement of the article into the bag forming apparatus in enabled and a bag preferably conforming to the volume of articles purchased in manufactured within the check-out counter.

Abstract: An improved overhead covering device is provided for transportable open top cargo compartments of rectangular configuration. The covering device consists of a flexible cover, the underside of which has a number of parallel reinforcing slats adapted to slidably engage channels associated with the side walls of the cargo compartment. A drum, driven by a motor, enables the cover to be wound up for storage within a housing. The same motor pulls a cable which travels about a pulley wheel at the end of the cargo compartment and deploys the cover from the housing.

Abstract: A two-way connector comprisinga lens,light direction setting means for sending light from a light-transmitting member from one side to the other side of the lens as a light beam parallel to the optical axis,an optical fiber for light transmission and reception having a light transmitting and receiving end on a focal point on one side of the lens,an optical fiber for light reception having a light incoming end and a light outgoing end for conducting light gathered at a position deviated from the focal point of the lens on one side to a light receiving member, anda mirror disposed on the other side of the lens for receiving the light from the optical fiber via the lens and reflecting it to the incoming end of the light-receiving optical fiber via the lens.

Abstract: Certain derivatives of stilbene and diphenylacetylene capable of second harmonic generation when illuminated by coherent optical radiation are presented.

Abstract: An agricultural machine for smoothing ruts, such as are produced in a field by center pivot sprinkler irrigation systems, comprises a pair of rotary tillers arranged in a unique frame for traveling over and along respectively opposite sides of the rut as such tillers are rotated toward each other to break up clods of soil ridged above the rut at opposite sides thereof and to largely fill and smooth the rut. A guide shoe carried by the frame midway between the rotary tillers is preferably provided to travel along the rut and maintain the rotary tillers at proper working positions, and a hood with outriggered side walls hinged thereto for outward swinging movement preferably covers the rotary tillers.

Abstract: Recovery of cobalt and manganese catalyst from oxidation process, by precipitation with oxalic acid and alkali metal hydroxide, followed by oxidation of the precipitate in acetic acid to form cobalt and manganese acetate.

Abstract: An improved device for killing arthropods characterized by a sloped target area that contains a toxicant, the device being devoid of any containment vessel for dead arthropods.

Abstract: This invention relates to a method for detecting whether contaminants are on or have migrated into the body of a plastic reusable food or beverage container. The invention uses a sensor attached to the inside of the container which changes optical density when it is exposed to certain contaminants. The change in optical density is detected by illuminating the sensor with ultraviolet light and then measuring the effect that the sensor has on the ultraviolet light.

Abstract: A single-filament specimen preparation fixture for preparing a multiplicity of tensile testing specimens from the same filament. The fixture can be used manually or it can be adapted for use as one element in an automatic testing system.

Abstract: A method is provided for inhibiting leukotriene biosynthesis and thus treating asthma, psoriasis or inflammation by oral administration of p-aminophenols having the structure ##STR1## wherein m is 0 to 5; X is CH or N; R.sup.1 and R.sup.2 may be the same or different and are H, lower alkyl, aryl, hydroxy, hydroxyalkyleneoxy, alkylthio, alkoxy, alkanoyloxy, aryloxy, halo, carboxy, alkoxycarbonyl or amido; R.sup.3 is H, lower alkyl, alkanoyl or aroyl; and R.sup.4 is H, lower alkyl, benzoyl or alkanoyl, and including acid-addition salts thereof, with the proviso that when R.sup.4 is benzoyl, R.sup.2 is other than H.

Abstract: The life of a salcomine catalyst used in the oxidation of phenols to quinones (e.g., of o-phenylphenol to phenyl-p-benzoquinone) is increased by the presence of a water- or acid-removing substance, e.g., a non-acid-forming chemical water scavenger, a molecular sieve, a weak inorganic base, or a sterically hindered organic base, in the reaction medium. Suitable water- or acid-removing substances include carbodiimides, e.g., dicyclohexylcarbodiimide; a Type 3A or 4A molecular sieve; finely divided metal oxides or metal carbonates, e.g., barium carbonate; and 2,6-lutidine. These substances chemically transform by-product carboxylic acids, and/or prevent the formation of such acids, whereby the life of the salcomine catalyst is prolonged.

Abstract: Reagents useful in the preparation of 5'-biotinylated oligonucleotides are disclosed.

Abstract: A wellhead for a polished rod pumping unit to provide emergency closure of the bore through the wellhead in the event of breakage of the polished rod. The valve assembly includes a flapper valve mounted on a swivel pin for movement between a vertical open position and a horizontal closed position across the wellhead bore. The flapper valve is spring biased toward the open position. A well pressure responsive cylinder and piston assembly is mounted on the side of the wellhead with an operating rod into the wellhead against the flapper valve to move the valve from the open position to a horizontal closed position. The piston is exposed to well pressure on the one side urging the piston outwardly to the valve open position and a spring engages the piston on the opposite side biasing the piston inwardly toward the valve closed position when well pressure is not sufficient to keep the spring compressed. One form of the wellhead includes a packing assembly for sealing around the polished rod.

Abstract: A modified fine powder polytetrafluoroethylene, and the process for preparing the polymer, in which the modifying copolymerizable monomer is a selected dioxole monomer. The composition is dispersion-process-produced and includes a core portion having a copolymer comprising repeat units provided by tetrafluoroethylene monomer and dioxole monomer, and a shell portion that is substantially free of dioxole units. The core and shell portions may contain perfluoro (n-propylvinyl) ether. The composition is useful for paste extrusion, such as in wire coating and tubing applications.

Abstract: An analytical separation device in which a capillary sized conduit is formed by a channel in a semiconductor device and the channel is closed by a glass plate. Electrodes are positioned in the channel and to activate the motion of liquids through the conduit by electroosmosis.