Abstract: In the decomposition of ozone in aircraft, the ozone level in an airflow upstream of the aircraft cabin is measured and a signal generated in accordance with the sensed level. This signal is amplified to a given value and a valve is opened or closed in response thereto. Connected to the valve is a source of nitric oxide under pressure. When the valve is opened a measured quantity of nitric oxide is dispensed to a location in said airflow remote from said ozone monitoring device.

Abstract: A process for disinfecting a water supply, employing as disinfectant a combination of monochloroamine and hydrogen peroxide for use as a disinfectant.The concentration of monochloroamine is preferably at least 0.02 ppm and generally not more than 0.5 ppm. The concentration of hydrogen peroxide is preferably at least 0.1 ppm and often not more than 1 ppm. Preferably the weight ratio of hydrogen peroxide to monochloroamine is in the range of 4:1 to 20:1.An advantage of employing a combination of monochloroamine and hydrogen peroxide as disinfectant is that a comparatively long lasting residual bactericide is thereby provided.

Abstract: Position sensing apparatus comprising two coil arrangements movable relative to each other, the first arrangement being a side-by-side array of elongate coil loops defining a writing area and the second coil arrangement being a single or multiple coil loose coupled with the coil loops in the array. The coil loops in the side-by-side array have phase-shifting units between them so that they give an output which is unambiguously and progressively phase-characterized dependent upon the position of the second coil arrangement on the writing area in the direction of the array. Two layers of the elongate coil loops can be provided so that the coil loops in one layer are at right angles to those in the other to give "x" or "y" co-ordinate positioning. The phase shift over the writing area may be less than 360.degree., or greater than 360.degree. with the use of an ambiguity eliminating circuit.

Abstract: An article of footwear is disclosed for enabling a sufferer or potential sufferer of postural low back pain to lean backwards. An integral portion of a ground - engaging sole of the article is a projection which extends backwards at least one inch behind the coronal plane containing the posterior aspect of the heel of the wearer.

Abstract: A multi-purpose marine structure intended to be submerged and installed on a sea bed. The structure comprises an outer peripheral body and a tapered inner section. The outer peripheral body is intended to be founded on a sea bed and comprises a tubular ring-formed body of concrete, the base of which is constructed and arranged to rest on a sea bed along its entire base periphery. The inner section is also of concrete and is formed as a cone or polyhedron having a lower end which is fixed to the outer peripheral body, the inner section tapering upwardly and inwardly from its lower end. The inner section and outer body together form a monolithic integral concrete unit, the inner section being fixed to the outer body along the inner periphery of the outer body.

Abstract: Water filled cavities are dried by replacing the water with a first liquid which is miscible with water and this is then replaced by a second liquid which is miscible with the first and which has a high vapor pressure. The second liquid is then replaced by a gas. The invention is particularly useful for removing water from between members which are to be explosively welded together underwater so as to improve the quality of the welded joint obtained.

Abstract: A catheter probe flow meter and method of determining the volume flow of a fluid through a conduit, at least one of the fluid and the conduit having energy-scattering interfaces. The method in one embodiment includes trasmitting at least two and receiving at least one or transmitting at least one and receiving at least two sound beams through the fluid, resolving the Doppler vectors into an average velocity vector for each transmitting/receiving combination, and resolving the resolved velocity vectors into their component parts.

Abstract: A process for extracting magnesium from compounds containing magnesium oxides is disclosed. The process is carried out at lower temperatures and pressures than previous processes which does not melt the dross. The process comprises the steps of mixing magnesium oxide and calcium oxide with aluminum, compressing the mixture, heating the compressed mixture uniformally to a temperature in the range of 800.degree.-1100.degree. C. under controlled pressure to vaporize the magnesium, and condensing the vaporized magnesium on a cooled surface.

Abstract: A continuous process for extracting magnesium from compounds containing magnesium oxides is disclosed. In the past such processes have been batch type processes with oxides placed in a crucible of a furnace. The process comprises the steps of mixing magnesium oxide and an alkaline earth metal oxide with a reducing agent, compressing the mixture into briquettes, feeding the briquettes onto a conveying means, heating the briquettes uniformally on the conveying means under controlled pressure to vaporize the magnesium, and condensing the vaporized magnesium on a cooled surface.

Abstract: A new compound having the formula ##STR1## and now designated forphenicinol is produced, which exhibits an immunopotentiating activity. This new compound as well as its pharmaceutically acceptable salts and hydrates are useful for immunotherapy and treatment of immune diseases and disorders in living animals, including human beings. The new compound can be produced by hydrolysis of the corresponding aminonitrile compound of the formula ##STR2## or by reduction of forphenicine.

Abstract: A stackable tapered tube body has an annular inwardly directed bead or corrugation in the region of the sealant layer. This provides that the tube bodies do not touch each other directly and that in particular the sealant layer is protected when tube bodies are stacked together.The beads or corrugations are produced by the tube shell being gripped substantially over its entire periphery, and deformed.

Abstract: A bag member for an air cushion vehicle flexible skirt has an apertured portion by which a space enclosed by the bag member and hard structure of a vehicle to which it is attached, is placed in communication with the vehicle cushion area. The apertured portion comprises a plurality of strips of flexible material laid across each other so as to form apertures therebetween. The apertured portion may be formed by a plurality of apertured panels comprising the aperture-forming strips of flexible material joined to strips of flexible material defining side edges of each panel.

Abstract: A vapor deposition process which is carried out in a gaseous environment. The homogeneous nucleation of the vapor species in the gaseous environment is suppressed by heating the gaseous environment.

Abstract: A method and apparatus of forming a layer of a metal or metal alloy on the surface of a workpiece by means of electrolytic plating, the workpiece being used as the anode. An electrolyte containing ion of at least one metal with which the workpiece is to be coated is caused to move by means of a resilient and electrically insulating material which is arranged on the anode and which is brought into contact with and adapts to the surface of the workpiece and is caused to move relative to said surface in a manner such that electrolyte and gases formed in said electrolyte are conveyed away at said surface and a low electrolyte temperature is maintained. The anode covers the surface of the workpiece to be coated and carries a resilient and electrically insulating material which divides the space between the workpiece and the anodes into cavities and acts as an electrolyte and gas conveyor and is in contact with the surface to be coated.

Abstract: The invention relates to thermally insulating, fire resistant material and its production.A problem associated with fire resistant material comprising refractory material and a binder is the tendency, in use, of the material to disintegrate due to bond failure. In the invention, hollow particles of a glass or of a ceramic are combined with a binder to give a material where the proportions of binder are such that the material is capable of deformation at high temperatures (e.g. up to 1100.degree. C.) without fracture or loss of cohesion. A specific example consists of 93% by weight of hollow spherical particles of pulverized fuel ash and 7% by weight of sodium silicate binder. The material is particularly useful in the protection of steel structures.

Abstract: Grinding apparatus is disclosed with the preferred embodiment being an automatic ice skate sharpening machine. The workpiece is secured to the frame, and a grinding wheel, mounted on a longitudinally moveable carriage, is biased against the workpiece for relative grinding movement. Sensing means are provided for detecting the grinding resistance of the workpiece on the grinding wheel, and control means responsive to the sensing means are provided for regulating the bias of the grinding wheel against the workpiece, in order to avoid chattering.

Abstract: Foam plastics sheet material, such as a wallcovering, has graduated color toning. The material comprises a substrate web having a pigmented base coat and a foam coat in which the pigment has migrated to the surface of the foam coat in varying degrees, or, in some areas, not at all.The foam coat can have at least two thicknesses or can be applied to a pre-embossed substrate web.

Abstract: A power unit comprises an internal combustion engine adapted for operating with natural induction, supercharged by a turbine-compressor unit receiving the exhaust gases of the engine. The compressor supplies air to the engine through an intake pipe provided with an atmospheric air inlet closed by a check valve in operation under load. The power of the engine is controlled by a power control member movable by an operator between a maximum power position and an idling position. An inlet valve, placed in the air inlet of the compressor and movable between an open position and a closed position, is biased towards closure by the power control member when the latter is moved towards its idling position. A locking member responsive to air pressure at the outlet of the compressor cooperates with said inlet valve to prevent its closing as long as the air pressure at the outlet of the compressor is greater than a predetermined threshold.

Abstract: A slack adjuster for railway brakes has an input member to which a brake force is applied and an output member movable coaxially therewith, a coupling element via which a brake force is transmissible between the two members and which is positively engaged with one of the members via a cooperating helical engagement means and is engageable with the other member via clutching faces which are retained in force transmitting engagement by the reaction forces produced by the helical engagement means when a force is transmitted between the members for a brake application, the clutching faces being disengageable when such reaction forces are removed to permit relative rotation of the members and enable wear or slack in the brake rigging to be taken up.

Abstract: A sealing arrangement for providing a fluid tight seal between the rim of a skirt or like member and a second member is in the form of first and second resilient concentric rings for mounting on the rim. The first ring is a sealing ring which has an annular face intended for sealing engagement with the second member. The second ring is radially displaceable so as to accommodate changes in dimension of the first ring when the first ring is deformed by the first and second members being urged together under pressure. In an embodiment, the annular face includes one or more sealing lips protruding from the face.