A joint for end-to-end coupling of two tubular elements includes tapered coupling surfaces on the tubular elements which are bonded together by adhesive. The coupling surfaces comprise a plurality of cylindrical sections of gradually increasing and decreasing diameters, respectively. A plurality of axially spaced-apart centering rings are interposed between the tubular elements to provide proper p...

The invention relates to a method of analyzing a multi-phase fluid flowing along a hydrocarbon well in order to determine, at each depth, the average static proportion of one of the phases by means of a local measurement. At each depth the local static proportion of the phase under investigation is determined at a point in the flow, which point is situated on a circle having a radius r in the tran...

Automatic exchange system for maritime telephone allowing the onboard user to dial directly the needed telephone number without having to go through a coast radio station operator. At the end of the dialling, the onboard set sends, towards the land station, its identification code in addition to the telephone number required. Coast radio station computer scans its user's file and, if the received ...

Method and apparatus for in-band, video broadcasting of commands to interactive devices are described. Control data are encoded by subliminally modulating, prior to the remote, composite video broadcast of video program material, a selected sequence of video image fields. The resulting modulated video fields within the viewing area of a television, each having alternately, proportionately raised a...

A welding muff comprises a thermoplastic, tubular muff body (1) which has a heating wire winding on its inner surface. A reinforcing layer connected to the muff body (1) by interpenetration of the material or by interlocking has a high rigidity which ensures that the welding pressure is absorbed during welding and the service life is prolonged.

A method and apparatus for sampling the gaseous content of a liquid laden with solids initially involves sampling the liquid as close as possible to the source of the liquid. A strainer housing having a strainer plate for filtering out debris in the liquid is connected to a suction pump for sucking the liquid into the housing and to the pump. The pump delivers the sampled liquid to a degassing dev...

An unstabilized or stabilized zirconium dioxide powder having good properties is obtained by a process in which zirconyl chloride and optionally a stabilizer or its precursor are melted in the presence of ammonium chloride, the melt is evaporated to dryness by evaporating off water and hydrogen chloride, the ammonium chloride is sublimed and the reaction product is calcined at elevated temperature...

By melting zinconyl chloride optionally with a stabilizer and reacting the chloride with gaseous ammonia, evaporating off water and, if appropriate, hydrogen chloride, subliming ammonium chloride at elevated temperature, calcining the reaction product and optionally milling the calcined product, an unstabilized or stabilized zirconium dioxide powder having good properties can be prepared. The proc...

A pharmaceutical composition for treating a disease caused by virus comprising an antiviral agent having no saccharide residue acylated with S-oxoacid and a glycoside having not less than two monosaccharide residue in which not less than one of the said monosaccharide residues have(has) at least one S-oxoacid group attached to the saccharic carbon atom(s) thereof through a linking group with a low...

The invention relates to an electro-acoustic transducer accommodated in a cabinet having a sound guide tube which conducts sound from the transducer o ut of the cabinet. The sound guide tube has the sound radiating end of lesser diameter than the external auditory miatus so that the surround sound is not blocked. The electro-acoustic transducer is operational in a sound reproducing apparatus sup...

PCT No. PCT/EP87/00189 Sec. 371 Date Oct. 5, 1988 Sec. 102(e) Date Oct. 5, 1988 PCT Filed Apr. 7, 1987 PCT Pub. No. WO87/06328 PCT Pub. Date Oct. 22, 1987.In a vacuum solar collector comprising a seamless deep-drawn trough (1) which contains an absorber (9) and conduits (12, 13) for a heat transport medium and comprises an edge (4) on which a radiation-permeable pane (7) rests which covers the tro...

The knee orthesis appliance is made of carbon-fibre composite material with an integral Menshik linkover four bar chain (21) made of titanium. It provides the knee joint with secure and reliable support. Owing to its low weight, it is extremely comfortable to wear. The angle of bend (22) can be adjusted to suit the individual as prescribed by the doctor. The shells of the appliance are made from a...

A composite piston for use in the cylinder of a diesel engine has coaxial first and second sections and a piston pin which articulately connects the sections to each other and to the piston pin bushing of the connecting rod. The first section has a round head and two piston pin bosses which are connected to the head by a hollow frustoconical portion of the first section. The bosses are reinforced ...

A process for preserving cultured epithelial sheets by incubating the sheets at room temperature in media with a glycerol or dimethylsulfoxide as cryopreservant for a predetermined period of time and then freezing the cultured sheets. The cooling gradient is characterized as having a lower initial rate of cooling followed by a higher rate of cooling.