Abstract: In the recovery of titanium dioxide by subjecting an aqueous titanium dioxide hydrate suspension to at least one stage of filtering and washing to form a washed filter cake, adjusting the composition and calcining the adjusted and washed filter cake, the improvement which comprises filtering the aqueous titanium dioxide hydrate suspension under a pressure of about 1 bar to 16 bars to form a homogeneous substantially crack-free filter cake of a thickness of about 10 to 25 mm. Advantageously a membrane filter is employed, and washing is effected under a pressure of 1 to 16 bars and a liquid flow rate of 0.1 to 1 m/h to produce a filter cake having a solids content of at least 45 % by weight.

Abstract: The invention relates to a stirring and cleaning apparatus for a liquid tank, e.g. a milk tank, said stirring apparatus comprising a rotatable, motor-driven hollow stirring shaft disposed in the tank, which shaft is provided at the bottom with stirring paddles and at its top is connected to a pipe for pressure liquid and at its bottom being provided moreover with upwardly directed spray orifices.

Abstract: Disclosed is a staggered channel wing-type aircraft comprising a reverse staggard lower and upper wing which relates to aircraft of the type generally described as a short takeoff and landing vehicle (STOL) and more particularly to an improved version thereof having superior low speed handling characteristics in both takeoff and landing and an economical high speed cruise configuration. Also having an improved gliding characteristic and easy storage because the wingspan is reduced to a minimum but keeping still rather large wing area.

Abstract: A multispeed winch having a drum about which a rope or the like may be wound and a drive shaft extending through the drum which is rotatable by a winch handle. Gear trains located within the drum provide two gear ratios between the shaft and the drum. The desired gear ratio is dependent on the direction in which the handle is turned to rotate the shaft. A third, direct drive ratio is achieved by an arrangement which directly connects the winch handle to the drum.

Abstract: Direct-positive silver halide emulsions comprising fogged silver halide grains and an electron acceptor are described wherein the emulsion is spectrally sensitized by means of 2-aryl-indolocarbocyanines. The combination of electron acceptors and these spectral sensitizers provides super-sensitizing effects that are not impaired by the presence of color couplers.

Abstract: An installation for burning waste solvents is characterized by the use of a concentrically constructed nozzle by means of which the waste solvents and a mixture of compressed air and fuel may be burned simultaneously. The compressed air/fuel mixture may either serve to warm up the incinerator prior to the introduction therein of the waste solvents or may be used to support the incineration of waste solvents when the latter have a low heat value.

Abstract: A process is described for the preparation of pyrimidine derivatives having therapeutic properties. They have the general formula: ##SPC1##Wherein A represents an alkylene or alkenylene grouping which together with the carbon atoms of the pyrimidine nucleus to which it is attached forms a homocyclic ring containing five to seven carbon atoms, which homocyclic ring may carry one or more halogen, lower alkyl and/or lower alkoxy substituents and R represents an amino, lower alkylamino or di(lower)alkylamino group, or a nitrogen-, oxygen- or sulphur-containing saturated or unsaturated mononuclear heterocyclic group linked to the pyrimidine ring either through a carbon atom or, when the group contains a nitrogen atom, either through the nitrogen atom or a carbon atom and are prepared by reacting a cycloaliphatic(A)oaminonitrile with a nitrile of the formula R-CN where A and R have the above meanings in the presence of a basic alkali metal-containing compound and then reacting the resultant intermediate with water.

Abstract: A rotary mower comprising at least one rotary cutter unit mounted on a framework, the framework having at least one forwardly extending lower support for rotatably supporting the cutter unit at its lower end, and a freely rotatable shield disposed proximate to the foremost edge of the or each support and underneath the or each cutter unit for shielding said foremost edge.

Abstract: A device for supporting the skull of a person laying horizontally, mainly for taking X-ray photographs of the skull and which device is adjustable for bringing the skull to a desired position and retaining the skull while being X-rayed.

Abstract: A toner material for use in the development of electrostatic charge patterns is described which comprises carbon black as coloring material, polystyrene as thermoplastic resin binder and at least one diester of orthophthalic or metaphthalic acid that is solid at room temperature as plasticizer, wherein the polystyrene binder has a molecular weight comprised between about 30,000 and about 70,000, the proportion by weight of the carbon black to the binder is comprised between about 5:100 and about 20:100, and the proportion by weight of the said plasticizer(s) to the binder is comprised between about 2:100 and about 15:100. The toner material is of a very simple and inexpensive composition and nevertheless has optimum photographic and physical properties.

Abstract: An aluminum bronze alloy for forming corrosion resistant articles by cold working, the alloy comprising by weight 5% to 8% Aluminum, 0.1% to 2% Cobalt and 0.10% to 0.25% Tin, which latter may be replaced by an equal amount of Silver, and the balance being Copper and impurities.

Abstract: A wiper arm assembly is disclosed for use in operative association with a wiper blade and is adapted for typical, although not exclusive, application on vehicular windows, such as windshields, and rear and side windows. The wiper arm assembly of the present invention is operated by means of a drive motor which is located directly within the arm itself and is controlled by a plurality of electrical switches associated with a source of electrical energy, such as the vehicle battery. The assembly comprises inner and outer arm sections which are pivotably connected to one another and the aforementioned electrical switches are controlled by relative pivotal movement between the arm sections. One of the switches in the arm assembly functions to reverse the polarity of the electrical energy supplied to the drive motor, whereby to cause reverse rotation on the output shaft thereof and hence provide for oscillatory or reverse pivoting movement of the arm assembly.

Abstract: A windshield wiper construction adapted to provide for longitudinal sliding or shifting movement between the wiper element and associated flexor member relative to the associated superstructure and wiper arm, whereby to accommodate for variations in windshield curvature. The construction may be fabricated of a one-piece monolythic structure, thereby obviating the need for various connecting links and the like which have been utilized in the prior art and thus simplifying the fabrication, construction and assembly time and expenses to the extreme.

Abstract: A vehicle suspension system for use in operatively supporting the road engaging wheels on an automotive vehicle, the suspension including a pair of suspension struts each of which includes an elongated tubular pressure cylinder, a valved piston reciprocally disposed within the cylinder and connected to one end of a piston rod which extends axially from the cylinder, a rod guide disposed at one end of the pressure cylinder for supporting the piston rod for reciprocal movement, an elongated reserve tube arranged concentrically around the pressure cylinder, with one end of the reserve tube extending axially beyond the axially outer end of the rod guide and having the terminal end portion thereof deformed radially inwardly over the portion of the rod guide, a wheel spindle located at the opposite end of the strut from the rod guide and including a first portion fixedly secured to the outer periphery of the reserve tube and a second portion removably secured to the first portion and adapted to support a vehicle wh

Abstract: New "duplo" quinoline compounds useful as photoconductors and having the formula: ##SPC1##Wherein:Z represents the atoms necessary to close an adjacent aromatic ring,R' represents a lower alkyl radical, andX represents an alkylene group or an alkylene group interrupted by a bivalent aromatic group.

Abstract: Polyurethane elastomeric filaments of improved physical properties and chemical resistance prepared by preforming the filamentary material such that the polyurethane contains at least about 100 up to about 700 milliequivalents/kilogram of reactive terminal amino groups, and then aftertreating this preformed filamentary polyurethane, optionally under simultaneous stretching, with an organic polyisocyanate and then preferably heating the treated material at an elevated temperature above about 140.degree.C. The polyurethane filamentary product is particularly useful in providing durable elastic filaments, fibers, threads, yarns, fabrics and similar textile materials.

Abstract: A sea going vessel, particularly adapted to serve as a supply and servicing ship for off-shore drilling platforms by fulfilling towing, anchor handling, and cargo carrying functions, wherein the propulsion and steering equipment is positioned in the forward portion of the vessel, a keel fin is provided underneath the aft portion of the hull, the deck house is located at a substantial distance aft from both the bow and the steering and propulsion equipment, the towing and anchor handling equipment is located aft of the deck house, and the cargo carrying space is located forward of the deckhouse.

Abstract: A heating apparatus with a combustion chamber defined by walls which are in heat-exchange relationship with the ambient air, in which a part of these walls define a channel communicating with a blower, this in such a manner that ambient air is sucked in through this channel from near the upper side of the apparatus, and warm air is blown out substantially horizontally near the bottom side of the apparatus.

Abstract: A joint support is adapted to be disposed beneath a joint at adjacent ends of horizontally disposed overlapping siding panels to support same and to assist in preventing the formation of a gap at said joint by virtue of inward buckling or deflection of one of the panels relative to the other. The joint support, as seen in a cross-section view taken at right angles to the longitudinal dimension of the panels in the installed condition has a wedge taper and has minimum thickness adjacent a first end which, in use, is uppermost. The opposite end of the joint support is contoured or shaped to overlie and accommodate the panel holding lip of a preceding lower panel. The first end of the joint support has an outwardly and downwardly turned portion adapted to fit over the panel holding lip or lips of the panels which the joint support, in use, underlies and the opposite end of the joint support includes shallow hook means thereon for snap fitting engagement over the holding lip of the preceding lower panel.

Abstract: Noise radiated into the atmosphere from a pile during pile-driving is inhibited by a tubular cover of flexible material having internal dimensions sufficient to pass, with an intervening air space, over a pile to be driven and an extended length sufficient to enclose a pile over its entire length, said cover being suspended from a hammer driving unit or a pile cap and being axially collapsible to reduce its length as the hammer driving unit or pile cap moves downwards while a pile enclosed in the cover is being driven into the ground.