The invention relates to apparatus for guiding a vehicle as it moves, of the kind comprising a detector (12) sensing deviation of the heading of the vehicle relative to a pre-determined direction and producing an electrical deviation signal, a hydraulic piston and cylinder device (16) steering the vehicle wheels (2) and control means (15) responsive to the deviation signal. The technical problem i...

L'INVENTION CONCERNE UNE SOURCE D'ALIMENTATION A LAME PIEZOELECTRIQUE.

LA SOURCE D'ALIMENTATION SELON L'INVENTION COMPORTE ESSENTIELLEMENT UNE LAME PIEZOELECTRIQUE 22 FIXEE PAR UNE EXTREMITE ET DONT L'AUTRE EXTREMITE PORTE UNE MASSE D'ACCORD 24 DONT L'AMPLITUDE DES VIBRATIONS EST LIMITEE PAR DES BUTEES. L'ENSEMBLE DE LA SOURCE D'ALIMENTATION ET DU DISPOSITIF DE DETECTION DE CONDITION DE B...

A method for the production of composite articles by pultrusion is provided wherein the articles comprise thermotropic liquid crystalline polymers and reinforcing fibers. The liquid crystalline polymers employed exhibit physical characteristics such that the negative slope of a dynamic viscosity-frequency curve (as defined) is less than about 0.35. The use of polymers having such rheological chara...

A lapping machine is disclosed wherein the workpieces whose surfaces to be lapped are held with a relatively light pressure on the surface of the lapping plate are drawn along a path alternately towards the rotation axis of said plate and away from it; a plurality of workpiece holders being provided at regular angular distances from one another at the periphery of at least one rotary disk with ver...

Fibre-reinforced rubbery polymers are prepared by mixing polymeric para-phenylene terephthalamide fibre with a solution of a rubbery polymer in a hydrocarbon solvent, and recovering the product by removing the solvent, in which either the fibre is subjected to fluffing prior to mixing, or the mixture is subjected to shearing agitation.

UN CADRE MOBILE 10 COMPREND UN MOYEN DE SERRAGE 25 ET UNE BARRE DE RIGIDIFICATION 33 MUNIE DE PINCES 35 MONTEE SUR UN PLATEAU ROTATIF 29. UN VERIN 43 PERMET DE FAIRE VARIER L'ECARTEMENT ENTRE LES MONTANTS 11 ET 12 ET DE PLACER LA DEMI-CARCASSE 1 EN EXTENSION. APRES QUE LA DEMI-CARCASSE 1 A ETE SAISIE EN POSITION VERTICALE, LE CADRE MOBILE 10 EST PLACE EN POSITION HORIZONTALE SOUS L'ACTION DU PI...

L'INVENTION CONCERNE UN DISPOSITIF A DEPRESSION POUR DEBRAYER AUTOMATIQUEMENT UN EMBRAYAGE A COMMANDE MANUELLE DANS UN VEHICULE AFIN DE SUPPRIMER LE CLIQUETIS MECANIQUE DANS LA BOITE DE VITESSES AU RALENTI. LE DISPOSITIF COMPORTE UN SERVOMOTEUR 8 AUQUEL EST FIXEE LA FOURCHETTE 4 DE DEBRAYAGE DE L'EMBRAYAGE ET QUI EST COMMANDE PAR LE LEVIER DE CHANGEMENT DE VITESSE POUR DEPLACER LA FOURCHETTE 4 ...

L'INVENTION A POUR OBJET DES RESOLS THERMODURCISSABLES CONTENANT DES ATOMES DE BORE, DE TUNGSTENE ETOU DE ZIRCONIUM CHIMIQUEMENT LIES.

ON PREPARE CES PRODUITS PHENOLIQUES MODIFIES EN FAISANT REAGIR UN RESOL AVEC L'ACETATE DE ZIRCONYLE, L'ACIDE BORIQUE ETOU UN PRODUIT DE REACTION DE TUNGSTENE-CARBONYLE ET DE PYRROLIDINE.

LES RESOLS CONTENANT LES METAUX, SELON L'INVENTION, SONT UTILES...

L'INVENTION CONCERNE UNE COMPOSITION ADHESIVE THERMOREACTIVE, THERMODURCISSABLE, EN UNE PARTIE, STABLE AU STOCKAGE.

SELON L'INVENTION, ELLE COMPREND UNE DISPERSION INSOLUBLE D'UNE RESINE EPOXY SOLIDE CONTENANT PLUS D'UN GROUPE EPOXY ET D'UN CATALYSEUR D'AMINE TERTIAIRE SOLIDE SANS EMPECHEMENT STERIQUE DANS UN VEHICULE LIQUIDE OU CES SOLIDES SONT AU MOINS PARTIELLEMENT SOLUBLES A L'ETAT FO...

Embodiments include flying "catamaran" heads with "TSF" rail-faces, consisting of a flat-taper segment and an adjoining "spherical-flat" segment, adapted to eliminate "pinch-off" instability and the like when flown on opposing sides of a flexible medium.

PURPOSE:To provide a combustion device which eliminates the need for a clinker removing work or addition of a removing device even if high-efficient high- temperature combustion is continued for a long time and performs complete combustion in that even any flying sparks are not mixed in exhaust gas, by a method wherein swirling movement, attended with the cyclone effect of a centrifugal force, is ...

Process for purifying phosphate containing waste waters in which aluminum oxide is used as the sorption material. The waste water is brought into contact with fine-grained aluminum oxide in a grain size range from 0.05 to 0.2 mm. Simultaneously, a gas is blown in, which is inert with respect to Al2O3 and with respect to phosphate ions.

The system comprises, besides an aeration zone and a clarification zone separated by a vertical wall (14), at least an intermediate filtering-flocculation zone limited by the vertical wall (14) and an oblique wall (12) under the clarification zone (11). Under this filtering-flocculation zone is a concentration zone (13) of the sludge limited by the vertical wall (14) and an oblique wall (10) of th...

The present invention relates to a process for making bioactive coatings on osseous prostheses, wherein, from solutions, a mist of particles containing calcium ions and orthophosphate ions is made and said mist is brought into contact with an implant made of inert material under such operational conditions that at least one desired calcium phosphate is formed by reaction on the hot surface of said...

The invention relates to a method for producing a reactor cylinder for use in a radiant heater. According to the invention, a liquid vehicle comprising an alumina dispersion is prepared, the dispersion is diluted by adding water to it, colloidal silica and talc powder are added to this formed vehicle, a combination of solid alumina and silica fibres are mixed with the liquid vehicle, all the const...

A fuel injection system, especially for air-compressing, spontaneous ignition reciprocating piston internal combustion engines. At least one parameter which characterizes the injection process, such as beginning and duration of the injection, is adapted to be regulated by at least one electromagnetic control valve per cylinder unit which can be controlled by an electrically operating data processo...

Part of the flue gases from the gas or oilfired glass melting furnace is used to preheat the frit. The other part is used in a radiation recuperator to preheat the air of combustion. The two parts are then merged and used in a convective recuperator for an initial preheating of the air of combustion. One part of the flue gases from the melting furnace is directed to the preheater for frit in which...

A new acidic polycyclic ether antibiotic has the formula: +TR and can be prepared by the submerged aerobic propagation in aqueous nutrient media of Streptomyces halstedii ATCC 31812. The antibiotic and its cationic salts are active against a variety of microorganisms and are effective in controlling coccidiosis, enteritis, swine dysentery and theileriosis as well as being effecti...

Synthetic DNA coding for a mammalian polypeptide, e.g. somatostatin, is prepared in which at least a majority of the codons are those preferred for the expression of microbial genomes. The DNA is prepared by joining together two appropriately coded series of fragments by hydrogen bonding and then completing the two strands by ligation, the fragments lacking complementarity other than in the correc...

The present invention relates to new steffimycinone analogues and to the process for their preparation. These analogues correspond to the formula II below: Application as antibacterial agents and for the preparation of antitumour agents by coupling with sugars.;

LA PRESENTE INVENTION EST RELATIVE A DE NOUVEAUX ANALOGUES DE LA STEFFIMYCINONE ET A LEUR PROCEDE DE PREPARATION.

CES ...