Abstract: The present invention concerns a device for indicating the position of an aircraft (H) notably a helicopter (H) with respect to a beam (F).In accordance with the invention, said indicator includes fixed first means (6) indicating the position of said aircraft (H), movable second means (7) indicating the position of the beam (F) in a predefined direction with respect to said aircraft (H), and third means (8) indicating which way to steer the aircraft (H) in the predefined direction to capture the beam (F) to said third means (8) being activated only when the aircraft (H) has crossed the beam (F) completely and is outside it.

Abstract: A process for the preparation of 2,6-pyridinedicarboxylic acid esters of the general formula: ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.6 -alkyl group, a C.sub.3 -C.sub.6 -cycloalkyl group, an aryl group or an arylalkyl group, and R.sup.2 and R.sup.3 independently of one another are hydrogen or chlorine and R.sup.4 is hydrogen, a C.sub.1 -C.sub.6 -alkyl group, a C.sub.1 -C.sub.6 -alkoxy group or fluorine. The 2,6-pyridinedicarboxylic acid esters are obtained by reaction of the corresponding halopyridines with carbon monoxide and an alcohol of the general formula:R.sup.1 --OH IIIwherein R.sup.1 has the abovementioned meaning, in the presence of a base and of a complex of palladium with a bis-diphenylphosphine. 2,6-Pyridinedicarboxylic acid esters are intermediates for the preparation of compounds having anti-inflammatory action.

Abstract: A satellite, especially a geostationary satellite, which includes: at least one face (5) which is used as a thermal radiator for the equipment carried on board the satellite (1) and is arranged in the path of the solar radiation (9); at least one solar panel (7) which is a generator of electricity, which is pointed continuously toward the sun and projects from the face (5); and a screen (14) secured to the solar panel (7), which is arranged at the periphery of the satellite and which stops the solar radiation (9) directed toward the face (5). The satellite is noteworthy in that the solar panel (7) is arranged centrally with respect to the face (5) and the screen (14) is secured to the solar panel (7) by an arm (15).

Abstract: A process for converting carbon or carbonated compounds in a plasma into carbons having a defined nanostructure consists of a reaction chamber whose head part contains three electrodes, a plasma gas supply, and a carbon or carbonated compound supply. A process for preparing carbons having a defined nanostructure. Apparatus to carry out the processes.

Abstract: A waterbed mattress system for boats and, in particular, to a waterbed system for a boat having a cabin at least partially below a deck which includes a waterbed mattress which can be filled from a body of water surrounding the boat through the hull of the boat or from an internal or external supply through a series of tubes and a pump.

Abstract: Methyl-5-(3-methyl piperidino)pentanamines of general formula ##STR1## in which one of the two radicals R.sup.1, R.sup.2 is hydrogen and the other methyl, are produced by two-stage hydrogenation from 2-methyl glutaronitrile. The compounds are suitable as catalysts in the production of polyurethanes.

Abstract: The present invention relates to an air inlet cowl (9) for a jet engine, especially for an aircraft. According to the invention, the diffuser (12) of hot air for de-icing, arranged in the hollow leading edge (16) of the cowl (9) is in the form of a polygonal ring and is fixed by elastic support tabs (24) each equipped with a ball joint (25) holding a straight portion (22) of the polygonal ring.

Abstract: Cycloaliphatic epoxy compounds represented by general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen atoms, or R.sup.1 and R.sup.2 taken together represent an epoxy group, R.sup.3 and R.sup.4 are the same or different and each represents a hydrogen atom or a methyl group, and Q is a linear or branched alkanediyl group with 2 to 16 carbon atoms and with the proviso that the adjacent nitrogen and oxygen atoms are not attached to the same carbon atom. The cycloaliphatic epoxy compounds can be used to produce cured epoxy resin compositions exhibiting superior mechanical properties, e.g., tensile and flexural strength and toughness.

Abstract: Nicotinic acid is produced from aqueous solutions of ammonium nicotinate by spray-drying. The nicotinic acid can be freed from residual ammonium nicotinate by a thermal post-treatment in a fluidized bed or under reduced pressure. The process is suitable in particular for the work-up of the reaction mixture produced in the oxidation of 3-methylpyridine with atmospheric oxygen, with the ammonia and, if appropriate, the water, being able to be recycled. Nicotinic acid ("vitamin PP") is an important additive to foodstuffs and feedstuffs.

Abstract: Catalyst compositions based on amorphous partially dehydrated zirconium hydroxide which are doped with from 0.01 to 20 atom percent of copper and/or from 0.01 to 20 atom percent of nickel, in each case based on zirconium, and have a specific surface area by the BET method of at least 50 m.sup.2 /g. The catalyst compositions are suitable, in particular, as the catalyst in hydrogen transfer reactions, such as, the Meerwein-Ponndorf-Verley reduction or the Oppenauer oxidation. The preparation of 3-hydroxyquinuclidine of the formula: ##STR1## involves reaction of quinuclidin-3-one with a secondary alcohol in the presence of the amorphous partially dehydrated zirconium hydroxide.

Abstract: A process and a device for verifying the consistency of the measurements made by an angle-of-attack probe (2) mounted on an aircraft. The device (1) includes:first system (3) for computing a first coefficient of lift of the aircraft from a measurement from the probe (2) and from data relating to the aircraft;second system (5) for computing a second coefficient of lift from information about the aircraft;system (6) for computing the difference between the first and second coefficients of lift and for deducting therefrom that the measurement is or is not consistent.

Abstract: A resin composition for use in a coating composition comprising (A) a base resin having a hydroxyl value of 20 to 200, (B) a silicone compound consisting of a partial hydrolysis.condensation product of (i) an organofunctional group-containing alkoxysilane compound containing at least one organofunctional group selected from the group consisting of mercapto group, epoxy group, (meth)acryloyl group, vinyl group, haloalkyl group and amino group, (ii) a tetraalkoxysilane compound and preferably (iii) a trialkoxysilane compound, and (C) a reaction product prepared by partly reacting the hydroxyl group in the base resin (A) with alkoxysilyl group in the silicone compound (B).

Abstract: Reflector having a composite reflectivity-enhancing layer as reflecting surface layer on a reflector body where the said composite layer has an outer layer facing the radiation to be reflected, the HI-layer, with a refractive index n.sub.2, and, between the reflector body and the outer layer, an LI-layer with a refractive index n.sub.1 which is smaller than n.sub.2 and the LI and HI layers are .lambda./4 layers. The HI-layer is a sol-gel layer and the optical layer thickness d.sub.opt,1 of the LI layer and d.sub.opt,2 of the HI layer are such thatd.sub.opt,i =d.sub.i.n.sub.i =l.sub.i..lambda./4.+-.20 nm, i=1 or 2where d.sub.1 represents the thickness of the LI layer in nm, d.sub.2 the thickness of the HI layer in nm, .lambda. the average wavelength in nm of the light striking the reflector surface and l.sub.1, l.sub.2 are uneven natural numbers. The LI layer is a barrier layer of aluminium oxide made by anodising, or a sol-gel layer.

Abstract: A process for preparing alkoxypyrazine derivatives of the general formula: ##STR1## These alkoxypyrazine derivatives are obtained by reacting a glyoxal derivative of the general formula: ##STR2## and an aminomidiate of the general formula: ##STR3## The alkoxypyrazine derivatives are important intermediates for preparing pharmaceutically active compounds.

Abstract: New microorganisms with plasmids stable relative to betaine use. These new microorganisms contain (a) a hybrid plasmid with a DNA fragment that contains a genetic sequence that codes for the use of betaine and (b) a mutation in the chromosomal gene coding for the betaine use.

Abstract: An oven for warming food, which includesa carcass (2) delimiting a warming chamber;a rack (8) provided with two opposed perforated sidewalls (12) and placed inside of the carcass (2) so as to create first and second lateral spaces (13A, 13B);a blower unit (14) mounted on the back wall (7) of the carcass (2);unit (15) for guiding the air blown by the blower unit (14).The unit (15) for guiding the air blown by the blower unit (14) and heated directs the air only toward the first lateral space (13A). The blower unit (14) draws the air from the second lateral space (13B).

Abstract: A process for the synthesis of methanol on X-ray amorphous catalysts with a copper, zinc and zirconium oxide content in relative proportions of 10 to 70 weight percent of copper, 10 to 50 weight percent of zinc and 20 to 80 weight percent of zirconium. The process for the synthesis of methanol is distinguished by high space time yields.

Abstract: A process of dewatering primary-treated sewage which includes mixing the sewage with a coagulant or flocculant aid, usually activated polymer. The sewage is then mixed and flocculated at conditions which involve extensive mixing turbulence of the sewage and whereby part of the sewage is recycled so as to be again subjected to such mixing and flocculating. Flocks form the solid particles in the sewage. The pH of the sewage is chemically adjusted into the basic pH range or to a higher basic pH. The sewage is applied to a sand bed whereby the flocculated solids in the sewage are separated from the liquid in the sewage, by collecting on the top of the sand bed. The flocculated solids located on the top of the sand bed are air dried. The dried flocculated solids are removed from the top of the sand bed.

Abstract: The manufacture of a fibrous structure (1) for a composite material part. At least one portion (3) of the fibrous structure (1) is obtained by at least partial machining of a fibrous blank stiffened by freezing a liquid impregnating the blank.

Abstract: A device for collecting fragments of walls of internal organs. The device includes a tube having an opened proximal end, furthest from the patient, and a distal end sealed except for a suction aperture, a sealed plunger adapted to move in the tube and connected to the distal end of a rod having a proximal end, opposite to the patient, provided with a griping member and apparatus provided towards the distal end of the tube and adjacent to the suction aperture for enhancing and increasing the mechanical action of collection of the tube on the wall. The surface of the outer wall of the tube, adjacent to the aperture, over at least a part of the periphery of the wall, is rougher than the rest of the tube.