In a gas-recombination lead accumulator, the electrolyte includes additives selected from the group consisting of ions of tin, selenium and bismuth and/or organic molecules selected from the group consisting of n-dodecylamine, 2,3,4-trimethoxybenzaldehyde, 3,5-diaminobenzoic acid, nicotinic acid and their sodium, potassium and magnesium salts. The presence of the aforesaid additives has the effect...

The present invention relates to a composite material comprising a porous lead alloy containing from 0.7 to 1.0% silver or 0.1 to 1.0% calcium or 0.7 to 1.0% silver and 0.1 to 1.0% calcium and having its pores filled by a resin such as epoxy resin. The product has utility as a battery electrode and as a sound absorbing material.

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

PCT No. PCT/SE89/00138 Sec. 371 Date Nov. 1, 1990 Sec. 102(e) Date Nov. 1, 1990 PCT Filed Apr. 16, 1989 PCT Pub. No. WO89/10793 PCT Pub. Date Nov. 16, 1989.In a centrifugal separator there is formed within the rotor a separating chamber (7) and a central chamber (26), which latter communicates with a peripheral part of the separating chamber through a channel (19a, 19b). The part (19a) of the chan...

PCT No. PCT/SE89/00138 Sec. 371 Date Nov. 1, 1990 Sec. 102(e) Date Nov. 1, 1990 PCT Filed Apr. 16, 1989 PCT Pub. No. WO89/10793 PCT Pub. Date Nov. 16, 1989.In a centrifugal separator there is formed within the rotor a separating chamber (7) and a central chamber (26), which latter communicates with a peripheral part of the separating chamber through a channel (19a, 19b). The part (19a) of the chan...

At least one of the gears of a pair of meshing gears with constant tooth spacing has irregularly distributed, variously-sized, limited deviations ( DELTA b, DELTA da DELTA s, ...) from the standard shape of the teeth (Z1, Z2 ...), so that single-frequency vibrations do not occur and the total gear noise is substantially reduced. The irregularities may take the form of variations in the tooth tip...

In the representative embodiments of the new and improved methods and apparatus disclosed herein, a full-bore valve is cooperatively arranged to be tandemly coupled in a typical production string including a string of production pipe that is coupled to a packer isolating a lower well bore interval. A wireline measuring tool is lowered into the production string to land the tool in a measuring stat...

Différentiel à roues coniques, dans lequel, en présence d'un couple de rotation, il se produit un déplacement périmétrique des roues satellites coniques 14 reçues sur des tourillons 15, de sorte qu'un embrayage à friction 18 est sollicité. Cette sollicitation de l'embrayage à friction 18 provoque l'entraînement du carter 32 d'un accouplement à fluide visqueux 19 qui, pour une différence de vite...

Process for operating a plant for the gasification of fine-grained to dusty solid fuels, having a gasification reactor equipped with gasification burners, a device for separating fly dust from the crude gas, a fly dust receiver and a device for recycling fly dust into the gasification reactor. The gasification burners burn into the gasification reactor with a fuel/reactant jet which is rotationall...

Gasification burner for an installation for the gasification of fine-grain to powdery solid fuels, which has a gasification reactor, having a first central guide channel (1) for primary oxidising agents, a surrounding annular fuel channel (2) for the fuels which are introduced with a carrier gas, a second annular guide channel (3), surrounding the annular fuel channel (2), for secondary oxidising ...

A method of controlling fungal or bacterial growth in a synthetic metalworkig fluid comprising the addition to said fluid of (a1) 5-chloro-2-methyl-4-isothiazolin-3-one and (a2) 2-methyl-4-isothiazolin-3-one and (b) an ionene polymer wherein the ratio by weight of the sum of components (a1) and (a2) to component (b) is form 1:99 to 99:1 and wherein the amounts of the components are synergisti...

Expandable cement composition containing a cement, an organic binder and sodium percarbonate as oxygen-releasing agent, particularly suitable as an element of construction applying especially to thermal and sound insulation. The organic binder is a heat-curable resin or a water-soluble thermoplastic resin.;

Composition cimentaire expansible contenant un ciment, un liant organique et du percarbo...

An antipilferage system for the detection of magnetic tags comprises an assembly (2) of spirally wound emitter (1) and/or detector (3a,3b) coils. This arrangement enables a tag to be detected regardless of its orientation.

A computer comprises a plurality of processor modules (1100-110N), each having at least first and second I/O connection interfaces (126, 130A, 130B, 130C, 130D), a processor (122) connected to those interfaces (126, 130A, 130B, 130C, 130D), and read-write memory (118) connected to the processor. The first I/O connection interface (126) of each processor module (1100-110N) is connected to a common ...

A rear fog lamp comprises a light source (3) and a transparent element (4) having a prismatic internal surface (5) for directing the ligh rays emitted by the source into an outwardly-directed beam of light. The prismatic surface (5) includes a central zone (9) with first refractors and a plurality of peripheral zones (11, 12, 14, 15, 17, 18, 20, 21, 23-30) with refracting and refracting-reflecting...

A process for producing a calcium phosphate compound coated composite material is disclosed, wherein a coating layer of a calcium phosphate compound is formed on the surface of a metal substrate by coating the surface of said metal substrate with an aqueous solution of nitric acid having hydroxyapatite dissolved therein, and then firing said coated substrate at a temperature of 300 DEG C. or more...

Process for obtaining mineral plastics from one or more materials based principally on an alkaline earth metal in anhydrous powder form, such as oxide, peroxide, hydroxide, carbonate, silicate, aluminate, borate and stannate, at least one soluble salt of an alkaline earth metal, and water. The process is characterized in that a crystallization catalyst consisting of a modified catalysing solution ...

Disclosed are 1) osteogenic devices comprising a matrix containing osteogenic protein and methods of inducing endochondral bone growth in mammals using the devices; 2) amino acid sequence data, amino acid composition, solubility properties, structural features, homologies and various other data characterizing osteogenic proteins, and 3) methods of producing osteogenic proteins using recombinant DN...

Disclosed are 1) osteogenic devices comprising a matrix containing osteogenic protein and methods of inducing endochondral bone growth in mammals using the devices; 2) amino acid sequence data, amino acid composition, solubility properties, structural features, homologies and various other data characterizing osteogenic proteins, and 3) methods of producing osteogenic proteins using recombinant DN...

There is disclosed a prosthetic finger joint (10) for implantation between two finger bone sections (11 and 12), and which comprises a stem (13) for introduction into a passage (14) formed in the first finger section (11), and a part spherical head (15) provided at one end of the stem (13) to permit pivotting of the second bone section (12) relative to the first bone section (11). The head (15) de...