Additional reinforcement of an acid electrolyte fixed with a gelatiniser to protect it against shrinkage cracks is possible with the aid of an acid- and oxidation-resistant fibrous material by first producing a homogeneous sulphuric acid/fibre mixture, adding colloidally dissolved or colloidally dispersed silica to the latter while continuing to stir and then pouring this mixture while still in th...

A method and an apparatus for the radiographic recording of a patient's dentition, jaws, and skull regions invalues seating a patient in a patient chair (9) so as localize the patient in the coordinate system of the radiographic apparatus in an unequivocal position before taking the exposure for a radiograph (87). Furthermore, in accordance with the invention, the radiograph (87) is used for measu...

A polymer composition comprises : component a) which is at least one aromatic polysulphone, containing the repeating units - Ph - SO2 - Ph - Ph - SO2 - Ph - I and - Ar - II (where Ph is phenylene and Ar is a divalent aromatic radical) linked together through ether linkages, in a relative molar proportion of the units I : II in the range 25 : 75 to 60 : 40; and component b) which is 5 to 80% b...

A method and an apparatus for the radiographic recording of a patient's dentition, jaws, and skull regions invalues seating a patient in a patient chair (9) so as localize the patient in the coordinate system of the radiographic apparatus in an unequivocal position before taking the exposure for a radiograph (87). Furthermore, in accordance with the invention, the radiograph (87) is used for measu...

Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may ...

This invention relates to a foldable armchair incorporating adjustable backrest and footrest, in which the connecting elements which control orientation of the footrest are connected to the backrest by pivoting crank pins provided with bearing faces cooperating with stops on said backrest, so as to make a unidirectional angular connection which ensures modification of the orientation of the footre...

The protected copolymer compositions of the present invention have the following structural formula: WHEREIN A is a cyclic or acyclic group having 1 to 12 carbon atoms, 2 to 26 - (j + m) hydrogen atoms, 0 to 4 oxygen atoms, and 0 to 2 nitrogen atoms, E is a group having the structure wherein n is 3 to 5, G is a group having the structure -CuH2u-2(CO2CvH2v + 1-2 WHEREIN U ...

A safety binding (1) for downhill skiing comprising a toe connection means (5, 24) and a heel connection means (6) for cooperation with corresponding parts of a ski boot (3), in which the toe connection means comprising a rotatable roller (5) having a support web portion (16) and from the said web portion an upwardly diverging conical portion (17), which roller (5) and its shaft (12) are spring bi...

A process for the gasification of sewage sludge or other carbon-containing waste materials in a gasifier (1) is described. A solid fuel and oxygen-containing gas are also fed into said gasifier. The residues formed during gasification collect at the bottom of the gasifier in the form of molten slag. Gasification takes place in a fluidized bed (9) formed above the slag bath and constituted by the d...

Quinolone and naphthyridine antibiotics useful for treating ocular infections by topical administration.

An improved antistatic coating for a polyester support bearing a photographic layer is applied in two coatings using conventional coating equipment. The first coating contains an electrically conductive polymer and optionally a binding agent; the second coating contains a crosslinking agent.

There is disclosed a process for producing a dispersion of a phenolic resin in water by mixing a pre-formed, solid, substantially water-insoluble, phenolic resin with water, an organic coupling solvent, and polyvinyl alcohol. The resulting dispersions are especially useful in coatings applications.

A segmented display system (10) comprises a cathode plate (30) with slots (38) therein aligned with the segments (12, 14, 16, 18, 20, 22, 24) of a traditional numerical display pattern. Slots (38) are lined with a metallic lining (42) and act as cathode cells selectively energisable by external contacts (46-56). Overlying the surface of the cathode plate (30) is a display panel (80) transparent to...

Redispersible powders are obtained from an aqueous dispersion of a polymer built up from 20-60% of acrylic or methacrylic acid and 40-80% of alkyl esters of acrylic or methacrylic acid and having a minimum film-forming temperature (MFT) of below 60 degrees C and a dynamic freezing point (T lambda max) of the polymer of below 150 degrees C by spray drying at an inlet temperature Ti and an outlet te...

A process for installing seismic sensors inside a petroleum production well equipped with a cemented casing involves arranging the seismic sensors along an outer surface of the casing before being descended into a drilled well and cementing a ring-shaped space between the casing and the well so as to acoustically connect the sensors to geological formations. The sensors and transmission cables whi...

A workpiece having a generally cylindrical outer surface centered on an axis is machined by first closing a pair of journal halves having generally semicylindrical inner surfaces of slightly greater diameter than the outer workpiece surface around the workpiece. Then a fluid is pumped under superatmospheric pressure into the space between the journal inner surface and the workpiece outer surface s...