Showing papers by "Solvay published in 1983"

Plug-in ground fault circuit interrupter module

Abstract: Ground fault circuit interrupter components, including a fault-sensing circuit and a relay, are enclosed within a housing having terminals for connection of the wires of a line cord extending from an electrical appliance or other electrical load for which ground fault protection is provided. Standard plug blades extend from the housing for insertion into a conventional electrical receptacle to connect the load to a source of electrical power, the circuit interrupter components being interposed between the wire connection terminals and the blades. The housing configuration and assembly provides an essentially waterproof enclosure for all elements between the line cord and plug blades which is preferably divided into two discrete compartments, one containing the wire connection terminals and the other the GFCI components. Thus, if the one compartment should develop a leak, the water-tight integrity of the other is still maintained. The line cord extends into the module through a resilient sealing grommet which may conveniently be interchanged with different size grommets to accommodate line cords of various diameters without changing any other components of the module. Assembly is simplified and facilitated by providing a one-piece body member, open at both ends, and connecting all other components as a single assembly for insertion into the body and fastening with screws at each end to sealably close the body openings.

Electrical switch means particularly adapted to GFCI test and reset switches

Abstract: A pair of separate electrical switches are disclosed, each including a fixed contact supported by and electrically connected to a printed circuit board, and a movable contact comprising a deflectable portion of a strip of springy, conducting material. A single such strip is supported by and electrically connected to terminals of the circuit board in a central portion of the strip, the opposite end portions forming the movable switch contacts. A pair of push rods are carried by spaced, flexible, rubber boots which position the push rods and move them axially to urge the respective ends of the strip to a deflected position which moves one strip end away from the associated pin, opening a normally closed switch, and moves the other strip end to contact the pin, closing a normally open switch. The electrical and physical configuration of the switches is particularly suited to use as test and reset switches of a ground fault circuit interrupter device, in which context the invention is disclosed.

Ground fault circuit interrupter

Abstract: A circuit including a differential transformer for sensing an imbalance in the current flow through hot and neutral wires connected between a power source and load and a relay operable to break the connection in response to an imbalance of predetermined magnitude. The two movable relay contacts are placed directly in the two wires and are normally open, being closed when power is supplied to the relay coil, the input side of which is connected to a switching transistor. Features include connection of the relay coil as a series pass element in the feed circuit to reduce power dissipation and heat, decreasing the likelihood of contact chatter or welding, providing increased protection for the switching transistor without increasing relay contact opening time, and providing fail-safe operation for all of the more common types of failures in the protective circuitry. Open neutral and grounded neutral protection are also provided.

Cathode for the electrolytic production of hydrogen, and its use

Abstract: Cathode for the electrolytic production of hydrogen, having an active surface which comprises a nickel substrate and a coating film of dendrites of nickel or cobalt. This cathode can be used in a cell for the electrolysis of sodium chloride brine.

Aromatic amorphous thermoplastic terpolymers

Abstract: Described herein are amorphous thermoplastic terpolymers containing units of the formula: ##STR1## wherein R is independently hydrogen, C 1 to C 6 alkyl, or C 4 to C 8 cycloalkyl, a is an integer of 0 to 4 and n is independently an integer of 1 to 3. The units are attached to each other by an --0-- bond. These polymers have an excellent combination of mechanical properties. They display high notched izod impact values, high heat distortion temperatures and excellent environmental stress crack resistance.

Poly (aryl ether)s

Abstract: Poly(aryl ether)s which contain at least 20% by weight of bis-(3,5-dimethyl-4-oxyphenyl)sulfone structural units exhibit improved glass transition temperatures, improved flame resistance, improved gas permeability and improved alloying compatibility.

Process for producing crystals of hydrated sodium hypochlorite

Abstract: 1. Process for the production of crystals of hydrated sodium hypochlorite of the general formula NaClO . 2.5H2 O according to which there is added sodium hydroxide (9) to an aqueous sodium hypochlorite solution (7), the resulting solution of sodium hypochlorite and sodium hydroxide (10) is cooled (11) and the crystals of hydrated sodium hypochlorite (14) and a mother liquor (15) are separated, characterised in that there is employed an aqueous sodium hypochlorite solution (7) containing from 25 to 45.3% by weight of sodium hypochlorite, which is prepared by introducing chlorine (2) into an aqueous sodium hydroxide solution (3) which is at not less than 15 degrees C, so as to cause the sodium chloride to crystallise out, and separating off the sodium chloride crystals formed (6).

Method of heterologous cloning of gene in bacillus microorganism

Abstract: A method for heterologous cloning of a gene encoding α-amylase, protease, amyloglucosidase or glucose isomerase. The method involves the use of a bifunctional plasmid which can replicate in both E. coli and B. subtilis, and contains at least two selectable markers. A gene fragment for the enzyme is incorporated into the plasmid, leaving at least one functional selectable marker and a nonfunctional marker, producing a mixture of recombinant hybrid plasmids and the original bifunctional plasmid. This mixture is incorporated into E. coli microorganisms and transformants seiected. The transformants which contain the recombinant plasmid are identified, and plasmid DNA extracted. The plasmid DNA is used to transform Bacillus host microorganisms and transformants containing the recombinant plasmids are selected by means of the functional selectable marker.

Front and/or rear bodywork for motor vehicles

Abstract: The present invention relates to a front and/or rear bodywork for motor vehicles, comprising or including at least one hollow body of polymeric plastic material, in which the bumper has an outwardly curved surface area free from edges and ribs. The hollow body of the front and/or rear bodywork, formed by the bumper or by the front and/or rear body and of the bumper, comprises one or more plastic panels and/or plastic shells, of which one or more have been produced by cold and/or hot forming from semi-finished thermoplastic and/or from compressed-stretched semi-finished thermoplastic. One or more or all the plastic panels and/or plastic shells are produced by stretch-drawing or stretch-forming, deep drawing (including compressed-air forming and vacuum forming), compression moulding or compression forming or bending of semi-finished thermoplastic and/or compressed-stretched thermoplastic.

Process for the preparation of injection molded-stretch formed thermoplastic resin articles

Abstract: Disclosed is a process for the production of a shaped article from a thermoplastic resinous material, comprising the steps of heat plastifying the thermoplastic material; injecting the heat-plastified plastic material into a forming tool having a first shape configuration and at least one parting plane, to form a pre-form of the thermoplastic material; subjecting the thermoplastic material pre-form in the forming tool to a cooling phase; providing at least a partially new second shape configuration to the forming tool containing the pre-form; and during the cooling phase subjecting the pre-form in the forming tool having the second shape configuration to at least one pressure treatment under elevated pressure to produce a shaped article. Also disclosed are several embodiments of apparatus for carrying out the process.

Ferrosilicon aggregate for concrete and resins

Abstract: A floor topping, mortar and grout which include ferrosilicon in particle form. The ferrosilicon increases the wear resistance and impact strength of the topping, mortar or grout without the oxidation or discoloration normally attributable to materials which include iron borings. In addition, the ferrosilicon increases the light reflectivity of the topping material. A method of hardening and rendering wear resistant a concrete structure such as a floor comprising the placement of a mixture of Portland cement and particles of ferrosilicon material at the surface of the structure and thereafter troweling the mixture to a smooth surface.

Polyvinylidene fluoride compositions with reduced fume production

Abstract: 1. Compositions based on vinylidene fluoride polymers containing at least 85 mol % of monomeric units derived from vinylidene fluoride, which have a reduced smoke-generating capacity, characterized in that they contain as smoke reducer a molybdenum derivative, used at a rate of 0.1 to 5 parts by weight, expressed as total molybdenum metal, per 100 parts of vinylidene fluoride polymers.

Amino acid salts of 3-hydroxybutanoic acid

Abstract: Pharmaceutical compositions containing 3-hydroxybutanoic acid or a salt derived from this acid, such as a sodium salt or alternatively a salt derived from an organic nitrogen base such as an amine; the amine can be an aminoacid of natural origin, such as arginine. The compositions and the compounds according to the invention can be used for the prophylactic and curative treatment of cardiomyopathy of non-ischaemic and ischaemic origin.

Audio-visual cartridge and combined audio player and visual viewer

Abstract: An audio-visual cartridge containing two coplanar adjacent rotatable discs, a visual disc carrying a plurality of picture transparencies mounted in a ring for successive viewing and an audio disc having sound recording tracks on a face thereof for individual sound recordings corresponding to transparencies, the cartridge being in the form of a flat envelope having a first and second internal compartment disposed in coplanar relation for accommodating the discs. An apparatus for reproducing recordings while a user views transparencies on discs contained in an audio-visual cartridge is provided with a manual selector for rotating the visual disc and a motor drive for rotating the audio disc, an optical viewer for reading the transparencies, an audio device for reading sound tracks and reproducing recordings and a circuit and mechanism for coordinating the rotation of the discs so that individual recordings corresponding to transparencies are reproduced while the corresponding transparencies are being viewed.

Heat stabilized compositions based on pvc

Abstract: 1. Heat-stabilised compositions based on vinyl chloride polymers, comprising a customary primary heat stabiliser and at least one 2,6-dialkyl-3,5-dicarbalkoxy-1,4-dihydropyridine, characterised in that they contain at least one phenolic or sulphur-containing antioxidant.

Permeable diaphragm, made from a hydrophobic organic polymeric material, for a cell for the electrolysis of aqueous solutions of an alkali metal halide

Abstract: Permeable diaphragm for a cell for the electrolysis of aqueous solutions of an alkali metal halide, the diaphragm being made from a hydrophobic organic polymeric material containing an oxide of a metal chosen from amongst group IIa of the periodic table of the elements, the oxide being in the form of particles having a mean diameter of at most 0.5 μm.

Pharmaceutical compositions containg 3-hydroxybutanoic acid or its salts, and compounds derived from 3-hydroxybutanoic acid useful as medicaments

Abstract: Compositions. Compositions. pharmaceutiques contenant de l'acide 3-hydroxybutanoique ou un sel derive de cet acide tel qu'un sel de sodium ou encore un sel derive d'une base organique azotee tel qu'une amine; Pharmaceutical containing 3-hydroxybutanoic acid or a salt derivative thereof such as a sodium salt or a salt derived from a nitrogenous organic base such as an amine; l'amine peut etre un acide amine d'origine naturelle tel que l'arginine. the amine can be an amino acid of natural origin such as arginine. Les compositions et les composes selon l'invention sont utilisables pour le traitement prophylactique et curatif des cardiomyopathies d'origine non-ischemique et ischemique. The compositions and compounds according to the invention are useful for the prophylactic and curative treatment of ischemic and non-ischemic origin cardiomyopathies.

Process for treating lignocellulosic materials

Abstract: The process consists of a selective degradation of lignin and of hemicelluloses followed by a hydrolysis or a substitution reaction performed on the cellulose which has become accessible. This process can be employed for obtaining glucose or cellulose substituted especially by ether or ester functional groups.

Melange pour la preparation de compositions pour l'absorption et l'accumulation de calories

Abstract: MELANGE SEC PULVERULENT POUR LA PREPARATION DE COMPOSITIONS PATEUSES PAR ADDITION D'UNE QUANTITE APPROPRIEE D'EAU COMPRENANT UN SEL HYDRATABLE TEL QU'UN CHLORURE DE CALCIUM INDUSTRIEL SE PRESENTANT SOUS LA FORME D'UNE POUDRE DONT LES PARTICULES ONT UN DIAMETRE MOYEN INFERIEUR A 1 MM ET UNE POUDRE STABILISANTE TEL QU'UN MELANGE DE DIATOMITES AINSI EVENTUELLEMENT QU'UN AGENT NUCLEANT TEL QUE DU CHLORURE DE STRONTIUM SOUS FORME DE PARTICULES.

Process for rapidly terminating the polymerization of vinyl chloride in aqueous suspension

Abstract: Process for rapidly terminating the polymerization of vinyl chloride in aqueous suspension in the presence of lower dialkyl peroxydicarbonates by introducing effective amounts of ammonium hydroxide and an alkali metal thiosulphate, e.g. sodium or ammonium thiosulphate, into the polymerization medium. This process enables polymerization to be quickly and effectively terminated when a breakdown occurs.

Process for obtaining hydrogen chloride free from acetylene starting from mixtures containing hydrogen chloride, vinyl chloride and acetylene

Abstract: ON SOUMET UN MELANGE CONTENANT DU CHLORURE D'HYDROGENE, DU CHLORURE DE VINYLE ET DE L'ACETYLENE A UNE DISTILLATION DANS UNE COLONNE 1. ON PRELEVE, PAR LA VOIE 6, UNE PHASE GAZEUSE CONSTITUEE SUBSTANTIELLEMENT DE CHLORURE D'HYDROGENE ET CONTENANT DE L'ACETYLENE. ON LA MET EN CONTACT, DANS LE REACTEUR 7, AVEC UN CATALYSEUR D'HYDROCHLORATION TEL QUE DU CHLORURE MERCURIQUE DEPOSE SUR DU CHARBON ACTIF, ET ON LA REINTRODUIT, PAR LA VOIE 10, DANS LA COLONNE 1. ON SORT, PAR LA VOIE 13, DU CHLORURE D'HYDROGENE EXEMPT D'ACETYLENE ET, PAR LA VOIE 14, UN PIED LIQUIDE CONTENANT DU CHLORURE DE VINYLE. LE PROCEDE S'APPLIQUE AUX MELANGES DE CHLORURE D'HYDROGENE ET DE CHLORURE DE VINYLE PROVENANT DE LA PYROLYSE DU 1,2-DICHLORETHANE.

Concentrated compositions containing biosynthetic pesticidal products, and methods for their production and their use

Abstract: 1. Concentrated compositions containing biosynthetic pesticidal products originating from microorganisms of the Bacillus types, in the form of solid particles in suspension in a liquid whose density is similar to or slightly higher than the density of the solid particles, characterized in that they contain from 50 to 600 g of solid particles per litre and from 400 to 1 600 g of liquid per litre and that they have a viscosity of 0.5 to 200 x 10**-3 Pa s.

Installation pour la regulation d'un groupe de cellules d'electrolyse a cathode de mercure

Abstract: INSTALLATION POUR LE REGLAGE DES ANODES D'UN GROUPE DE CELLULES D'ELECTROLYSE A CATHODE DE MERCURE 1, 2, 3 COMPRENANT DES UNITES LOCALES DE REGULATION 8 ASSOCIEES AUX CELLULES ET CONCUES POUR CALCULER LA VALEUR INSTANTANEE DE LA CONDUCTANCE ELECTRIQUE DE LA COUCHE D'ELECTROLYTE ENTRE LES ANODES 4, 4, 4, 5, 5, 5 ET LA CATHODE ET ACTIONNER UN MOTEUR DE REGLAGE DES ANODES PAR COMPARAISON DE CETTE VALEUR AVEC UNE VALEUR DE CONSIGNE. UNE UNITE CENTRALE DE REGULATION 9 DIALOGUE SELECTIVEMENT AVEC LES UNITES LOCALES ET CALCULE, POUR CHACUNE D'ELLES, LA VALEUR DE CONSIGNE AU DEPART D'INFORMATIONS SUR LA MARCHE DE L'ELECTROLYSE.

Electrode for the eletrolytic production of gas, and electrolysis cell with a selective permeable membrane

Abstract: 1. Electrode, for the production of gas by electrolysis, comprising a vertical plate (10, 10') pierced with openings which connect one face of the plate, comprising at least two electrolysis zones (33, 34; 33', 34') which are separated by an inactive zone (35, 35'), to the other face, where ducts for introducing (17, 17') and removing (15, 15') the gas and the electrolyte are arranges, which electrode is characterised in that the ducts (17, 15; 17', 15') are arranged along the plate (10, 10'), parallel to the latter, and the openings are distributed over the plate (10, 10') so that each of the electrolysis zones (33, 34; 33', 34') is free of any opening, between the lower opening (13, 13') which opens out into a duct (17, 17') for introducing the electrolyte and an upper opening (14, 14') connected to a duct for the removal of the gas and the electrolyte and, furthermore, so that the inactive zone is located between the lower opening (13, 13') in the upper electrolysis zone (34, 34') and the upper opening (14, 14') in the lower electrolysis zone (33, 33').

Electrode pour la production de gaz par electrolyse et cellule d'electrolyse a membrane a permeabilite selective

Abstract: ELECTRODE POUR LA PRODUCTION DE GAZ ET CELLULE D'ELECTROLYSE A MEMBRANE A PERMEABILITE SELECTIVE EQUIPEE D'UNE TELLE ELECTRODE, CELLE-CI COMPRENANT UNE PLAQUE 10 DONT UNE FACE COMPREND AU MOINS UNE ZONE D'ELECTROLYSE 33, 34 EXEMPTE D'OUVERTURES, DISPOSEE ENTRE UNE OUVERTURE INFERIEURE 13 ET UNE OUVERTURE SUPERIEURE 14 QUI SONT RELIEES RESPECTIVEMENT A UN CONDUIT 17 D'ADDUCTION D'ELECTROLYTE ET A UN CONDUIT D'EVACUATION DU GAZ ET DE L'ELECTROLYTE DEBOUCHANT DANS UNE CHEMINEE 15, DISPOSES SUR L'AUTRE FACE DE LA PLAQUE 10. L'ELECTRODE ET LA CELLULE CONVIENNENT POUR L'ELECTROLYSE DE SOLUTIONS AQUEUSES DE CHLORURE DE SODIUM.

Preform made from a thermoplastic and process for blow-moulding a hollow article from such a preform

Abstract: The preform (1) for the production of hollow articles by blow-moulding possesses a profiled false neck (4) provided with a circular toothed collar (6), and during the thermal conditioning of the preform for the purpose of final blowing, the preform, held loosely by idling holding rollers (8)(9) at the level of the profiling of its false neck (4), is caused to rotate about its longitudinal axis by a toothed drive member (13) which cooperates with the circular toothed collar (6).