baber/WOPTO huggingface dataset:
Patent FR-2571357-A1 (FR)
Title: Procede de preparation de verre tubulaire en silice
Inventor: OSAFUNE HARUO
IPC: C03B19/12
Filed: 1985-10-03
Abstract: PROCEDE DE PREPARATION DE VERRE TUBULAIRE EN SILICE. IL CONSISTE A AJOUTER DE LA SILICE EN PARTICULES ULTRAFINES A LA SOLUTION DE SOL OBTENUE EN HYDROLYSANT L'ALCOOLATE METALLIQUE EN UNE QUANTITE DE 0,2 A 5 MOLES DE SILICE PAR MOLE D'ALCOOLATE METALLIQUE; A PLACER LA SOLUTION DE SOL COMPRENANT LA SILICE EN PARTICULES ULTRAFINES DANS UN RECIPIENT CYLINDRIQUE ET A GELIFIER LA SOLUTION DE SOL EN FAISANT TOURNER LE RECIPIENT; A SECHER LE GEL POUR FORMER UN GEL SEC; ET A VITRIFIER LE GEL SEC POUR FORMER UN VERRE TUBULAIRE EN SILICE. APPLICATION AUX FIBRES OPTIQUES.
Patent FR-2591307-A1 (FR)
Title: Pipe, method of installing the latter and device for implementing the said method
Inventor: SHISHKIN VIKTOR VASILIEVICH
IPC: F16L1/036
Filed: 1985-12-10
Abstract: The invention relates to civil engineering works. The pipe forming the subject of the invention is of the type consisting of separate elements 8 covered with anti-corrosion insulation, and assembled successively to one another by junction elements 9, and is characterised in that the junction elements 9 are elastic and in contact, over their entire surface and in a sealed manner, with the assembly part of the elements 8, the junction elements 9 being received in grooves made on the ends of the elements 8. The invention especially makes it possible to automate the operations of installing pipes.
Patent FR-2592165-A1 (FR)
Title: Dispositif de regulation de la richesse des gaz de combustion d'un moteur a explosion.
Inventor: SCOARNEC LOUIS
IPC: G01N21/59
Filed: 1985-12-23
Abstract: Dispositif permettant d'assurer une régulation de la richesse des gaz de combustion d'un moteur à explosion muni d'une part, d'un ensemble 1 de détection pour la mesure de la variation de l'absorption d'un rayonnement électromagnétique par un composé chimique contenu ou introduit dans les gaz d'échappement et d'autre part, d'un organe 31 d'alimentation en courant, d'analyse et de régulation électronique ; l'ensemble 1 de détection étant muni d'au moins un guide de lumière auto-nettoyant. (CF DESSIN DANS BOPI)
Patent FR-2576769-A1 (FR)
Title: Batteur rapide pour liquides contenus dans des mixeurs electromenagers
Inventor: BALDACCI LAPO
IPC: A47J43/07
Filed: 1986-02-03
Abstract: L'INVENTION A TRAIT A UN BATTEUR RAPIDE POUR LIQUIDES CONTENUS DANS DES MIXEURS ELECTROMENAGERS, FORMES D'UN RECIPIENT 2 POUR LE LIQUIDE A TRAITER ET D'UN MANCHON CREUX 4 CENTRAL TRAVERSE PAR L'ARBRE D'ENTRAINEMENT 5. UN CORPS CENTRAL 6 EST POURVU D'UNE LAME CIRCULAIRE 7 INCLINEE ANGULAIREMENT PAR RAPPORT A UN PLAN ORTHOGONAL A L'AXE VERTICAL DU CORPS 6. CELUI-CI SE COMPOSE DE DEUX TUBES REUNIS L'UN A L'AUTRE 8, 9; LE TUBE 9 SERT DE SIEGE A L'ARBRE 5 AVEC LEQUEL IL EST ACCOUPLE PAR UNE DENT 13. LE BATTEUR EST UTILISE POUR LE TRAITEMENT D'ALIMENTS.
Patent FR-2594873-A1 (FR)
Title: Roof covering made of composite materials
IPC: E04D3/35
Filed: 1986-02-26
Abstract: Roof covering of the type comprising composite materials, namely a soffit 3 which may be either a board of raw or pre-painted particles, or a panelled board; stiffeners 4 fixed on either side of the soffit and comprising a slot over the whole length of their external face which is used to receive the fixing elements so that the boards are aligned horizontally and to fix metal or plastic fasteners in order to nail or screw them to the rafters of the truss; an insulating material 5 which is either expanded or an expanded cellular foam having a thickness and density which may vary depending on the thermal requirements, a finishing layer 1 characterised in that its shape and its appearance represent a conventional roof of tiles or slates, made either of a polymer which is lightened by spraying or moulded, or of a moulded plastic or a metal plate which is preformed to the desired design, these various supports receiving a finishing layer made up of rock granulate or sand which is tinted as required, on an acrylic resin.
Patent FR-2597162-A1 (FR)
Title: Device for increasing the efficiency and making the output of wind pumps and hand pumps uniform
IPC: F04B11/00
Filed: 1986-04-14
Abstract: The invention relates to a device making it possible to increase the efficiency and to make the output of wind pumps and hand pumps, with a flywheel or a balance bar, uniform using reciprocating (single or double-acting, forcing or lifting and forcing) piston pumps. The device according to the invention consists, in its simplest embodiment, of a sealed cylindrical tank 19 of mechanical/welded construction containing liquid and air at the normal operating pressure. This tank is mounted on the forcing column 16 of the pump 17 of the wind pump or of the hand pump, immediately downstream of the pump. The axis of symmetry of this pump is coincident with that of the forcing column and is hydraulically connected to the latter via holes 27 made in the part of the column which is inside the tank; these holes being situated as close as possible to the base of the latter.
Patent FR-2602081-A1 (FR)
Title: Device for visually displaying the configuration of the heavenly bodies on a given day
IPC: G09B27/00
Filed: 1986-07-22
Abstract: The device includes, on the one hand, an annular dial 12 graduated over 360 DEG and divided into annular quarters which indicate the succession of the signs of the zodiac and/or of the nakshatra or lunar houses, and, on the other hand, a set of needles 15 mounted so as to rotate around a shaft 14 aligned with the centre of the said dial, the said needles 15 each corresponding to one heavenly body, and being capable of being placed in the position of the day by virtue of the graduation and on the basis of data contained in ephemerides which are known in themselves.
Patent FR-2602343-A1 (FR)
Title: Method and installation for predicting the change in atmospheric electrical phenemona linked with stormy conditions
Inventor: DELANNOY ALAIN
IPC: G01W1/16
Filed: 1986-07-31
Abstract: In order to predict the change in electrical phenemona linked with stormy conditions, the electrostatic field E in the atmosphere at ground level is measured at C at various points, and it is compared 23 with a critical threshold Es in order to obtain a logic signal S; the drift in the field with respect to time is calculated 25, as is the absolute value 27 of this drift; it is compared 28 with a critical speed B (calculated at 30) with which the field E should vary in order to reach the threshold Es in a critical time Tc, in order to form a logic signal C; and the data S and C are processed 36, in order to deduce therefrom the appearance or disappearance of danger and a logic signal A for controlling an alarm.
Patent FR-2602383-A1 (FR)
Title: Autoadaptive equaliser for heterogeneous sections of line
IPC: H04B3/04
Filed: 1986-08-04
Abstract: The equaliser aims to compensate losses due to first and second segments contained within a section of transmission line and having different lengths I4, I6 and different gauges RD4, RD6, that is to say different transmittances per unit length T4, T6. For this purpose, the equaliser EG comprises two autoadaptive equalisers in series. The first equaliser EG1 equalises the signal transmitted by the line SL into a first equalised signal e, as a function of one of the transmittances T6. The second equaliser equalises the first signal e into a second equalised signal s as a function of the ratio of the transmittances per unit length T4/T6.
Patent FR-2587823-A1 (FR)
Title: Dispositif de memoire a bulles magnetiques
Inventor: TAKEUCHI TERUAKI
IPC: G11C11/14
Filed: 1986-08-07
Abstract: DISPOSITIF DE MEMOIRE A BULLES MAGNETIQUES QUI COMPREND DES PISTES DE PROPAGATION DE BULLES MAGNETIQUES A IONS IMPLANTES A DISQUES CONTIGUS FORMEES EN IMPLANTANT SELECTIVEMENT DES IONS A L'INTERIEUR D'UNE COUCHE MAGNETIQUE QUI PEUT CONTENIR DES BULLES MAGNETIQUES. UN AU MOINS DES DISQUES QUI CONSTITUENT LES PISTES DES BULLES A IONS IMPLANTES ET DONT CHACUN PEUT AVOIR UNE FORME CIRCULAIRE OU UNE FORME CARREE EST CONFIGURE DE FACON A COMPRENDRE UNE COMBINAISON D'ARCS 20, 21, 22 DE CERCLE AYANT DIFFERENTES COURBURES OU UNE COMBINAISON DE COTES DE CARRES AYANT DIFFERENTES DIMENSIONS.
Patent FR-2606091-A1 (FR)
Title: Hydraulic supply system for a so-called "pressure-time" injection system
Inventor: MIETTAUX MARC
IPC: F02M47/02
Filed: 1986-10-31
Abstract: Hydraulic supply device for a so-called "pressure-time" injection system, of the type having a so-called main pressure and a so-called pilot pressure; according to the invention, this main pressure P1 and pilot pressure P2 can be adjusted.
Patent FR-2606063-A1 (FR)
Title: Water container which can be fitted to a parasol pole
IPC: A45B23/00
Filed: 1986-10-31
Abstract: Water container which can be fitted to a parasol pole. This container is divided into two independent parts 6, joined together by hinges 1, which will form the cylinder. Two hermetic lids are located above each part, by means of which the desired liquid and the ice cubes will be introduced. The system for closing the container is simple : the pole of the parasol is simply inserted into the opening and the closing clips 4 are actuated. In order to clamp the container, four half-joint elements 7 are placed at the top and bottom of each part of the container, and will create pressure when the device is closed : the container is thus tightly secured. In addition, two serving taps enable each person to serve himself a drink without disturbing the other, since they are located on each side of the device. The device according to the invention is particularly intended for satisfying the need of individuals.
Patent FR-2609558-A1 (FR)
Title: Equatorial astronomical-telescope mounting, called a disc mounting
IPC: G02B23/16
Filed: 1987-01-12
Abstract: The invention relates to a non-cantilevered equatorial mounting enabling the entire field visible to the naked eye to be observed at a given instant. It consists of a frame 5 and a circular disc 1 having two points of bearing which are formed by rollers 3 of respective axes 17a and 17b of supports 9 and of a third point of bearing formed by a point 4, via beams 2. The disc 1 of rotation axis alpha includes a recess 21 allowing free passage for the optical tube 6 of optical axis 7. This optical tube 6 rotates about the axis delta via bearings 8.
Patent FR-2611876-A1 (FR)
Title: Direct-current electric furnace
Inventor: DAVENE JEAN
IPC: C21C5/52
Filed: 1987-03-04
Abstract: The subject of the invention is a direct-current electric furnace for melting scrap metal or other unprocessed metal material, comprising a chamber 1 closed by a roof 2, in turn closed by an orifice 3 for introducing the unprocessed material 8, and at least one orifice 21 for the passage of at least one consumable electrode 4, connected to a direct-current source 6 and interacting with at least one stationary base electrode 7, placed in the bottom 1 of the vessel and connected to the current source 6 via at least one return conductor 71, for the formation of at least one electric arc between the consumable electrode 4 and the material 8 in contact with the base electrode 7. According to the invention, all the electrical equipment comprising the consumable electrodes 4, the base electrode 7 and at least the parts 71 of the return conductors passing under the vessel 1, is arranged symmetrically with respect to the vertical centre axis z, z' of the furnace, so that the centre of melting is situated substantially on the said axis z, z', and so that the orifice 3 for introducing the unprocessed material is placed at the centre of the roof 2, between the consumable electrodes 4, and emerges at the lower part of a device 5 for preheating the material 80, which device is in the form of a vertical column centred on the said vertical centre axis z, z' and is fitted with means 52 for progressively lowering material 80 in countercurrent to the gases drawn out.
Patent FR-2612817-A1 (FR)
Title: Crucible, especially for casting metal alloy in the thixotropic state
Inventor: COLLOT JEAN
IPC: F27D21/00
Filed: 1987-03-27
Abstract: Crucible, especially for casting metal alloy in the thixotropic state. The crucible 1 according to the invention is equipped with a sheath 6 of alumina accommodated in a rectilinear groove 5 of the crucible, opposite the pouring spout 2 for permanently accommodating a thermocouple.
Patent FR-2597845-A1 (FR)
Title: Dispositif de separation de feuilles
Inventor: HAIN DAVID ALEXANDER
IPC: B65H3/10
Filed: 1987-03-31
Abstract: L'INVENTION CONCERNE UN DISPOSITIF POUR RETIRER LES BILLETS DE BANQUE, UN A UN, D'UNE PILE DE CES BILLETS. LE DISPOSITIF COMPORTE UN TAMBOUR 16 DONT LA PERIPHERIE PRESENTE DES OUVERTURES QUI, PENDANT LA ROTATION DU TAMBOUR, PASSENT PAR UNE POSITION DANS LAQUELLE ELLE COMMUNIQUE AVEC DES OUVERTURES D'UN PEIGNE 88 DE GUIDAGE CONTRE LEQUEL EST APPLIQUE LE PREMIER BILLET D'UNE PILE 82. LORSQUE LES OUVERTURES DU TAMBOUR ET DU PEIGNE SONT EN COMMUNICATION, UN VIDE EST APPLIQUE A L'INTERIEUR DU TAMBOUR POUR QUE LE PREMIER BILLET 82 DE LA PILE SOIT ENTRAINE VERS UNE ZONE DE SERRAGE ENTRE LA SURFACE EXTERIEURE DU TAMBOUR 16 ET DES GALETS 38 D'AVANCE. DOMAINE D'APPLICATION: GUICHETS AUTOMATIQUES, ETC.
Patent FR-2616169-A1 (FR)
Title: Method for transporting and applying moist granular materials of low density which do not flow naturally and device for the implementation of this method
IPC: B28C5/12
Filed: 1987-06-03
Abstract: The present invention relates to a method for transporting and applying moist granular materials of low density which do not flow naturally and a device for the implementation of this method. Method characterised in that it consists in increasing the apparent density of the materials before they are admitted into the screw pump by passing them under force in a compression zone surrounding the supply member 3 before its connection to the screw pump 4, and in spraying the materials by mixing, at the end of the flexible conveying pipe, with a circular air jet.
Patent FR-2616437-A1 (FR)
Inventor: GIROT PIERRE
IPC: C08K3/36
Filed: 1987-06-11
Abstract: Homogeneous composite polymers containing, in interpenetrated form, 20% to 80% by weight of silica and 80% to 20% by weight of a three- dimensional crosslinked acrylic, vinyl and/or allyl copolymer containing in copolymerised form 98% to 70% by weight of at least one monofunctional acrylic, vinyl or allyl monomer and 2% to 30% by weight of a bifunctional acrylic or allyl crosslinking monomer.
Patent FR-2617706-A1 (FR)
Title: Hip prosthesis with adjustment strut having a frustoconical part inserted into a complementary cavity of the rod
IPC: A61F2/36
Filed: 1987-07-08
Abstract: Hip prosthesis comprising a head in the shape of a spherical cap 1, made of ceramic, metal or metal coated with ceramic, and a rod, advantageously a metal rod, comprising an end for linkage with the head, characterised in that the said linkage end 2 comprises a frustoconical cavity, and in that the head and the rod are joined together by means of intermediate struts 4 of variable height, advantageously made of metal, comprising a solid frustoconical part complementary with the said cavity.
Patent FR-2621297-A1 (FR)
Title: Stacking and nesting goods-handling box.
Inventor: MORET MICHEL
IPC: B65D21/04
Filed: 1987-10-05
Abstract: The invention relates to stacking and nesting goods-handling boxes of the type having substantially vertical support pillars L1, L2. Two opposite lateral walls 4, 5 of the box, having no pillars, are, over at least part of their length, inclined with respect to the vertical on approaching the bottom 1 of the box and one of them is provided with an external label-holder 16. The invention applies to any type of stacking and nesting box.
Patent FR-2621989-A1 (FR)
Title: Refrigerating, heating, cleaning and air-conditioning apparatus
IPC: F24F5/00
Filed: 1987-10-19
Abstract: The invention relates to a refrigerating, heating, cleaning and air-conditioning apparatus (RHCAA) which can supply compressed air, hot and cold conditioned air and can suck up air and various small light objects. According to the pneumatic circuit of the apparatus presented, the compressed air discharged via the outlets S2 and S3 flows through the compressor 2 and then, - filters 8 and 9 - valve 11 - regulator 12 - piping 24 - outlet S3 or transvector 4 and outlet S2; the conditioned air flows via the compressor 2 and then, - filters 8 and 9 - valve 10 - VORTEX tube 3 - distributor and outlet S1, or transvector 4 and outlet S2. The apparatus finds its applications in industry, hospitals, dwellings, vehicles and various installations for cooling, heating freezing, air-conditioning, vacuuming and cleaning requirements.
Patent FR-2625620-A1 (FR)
Title: Protective hood for electrical connection cabinet
Inventor: FOURMANN ROBERT
IPC: H02B1/14
Filed: 1987-12-31
Abstract: The present invention relates to a protective hood for electrical connection cabinet comprising a box 4 in which are arranged inlet ports 15 for a live supply cable 2 and outlet ports 16 for an application cable 3 which are capable of being connected by fuses, the said hood 8 being intended to replace temporarily or permanently the cover for closing the said box in order to allow completely safe activity on the outlet ports 16. According to the invention, the hood includes a mobile part 21 and a fixed part 20 capable of being joined fast, by way of fixing means, to the box 4, and, on the said fixed part 20 there is provided a transverse partition 22 intended to project inside the said box in order to separate the inlet and outlet ports 15 and 16.
Patent WO-8807736-A1 (WO)
Title: Method for marking an object in order to remotely detect such object in the case of loss or theft
Inventor: MASSON CLAUDINE JEANNE CAMILLE
IPC: A01N37/08
Filed: 1988-03-18
Abstract: A quantity of at least one odorant substance which is physiologically impossible to perceive for the human sens of smell but which is sufficient to be discerned at a distance by an animal capable of searching the origin of the smell emitted by said odorant substance or substances and/or who will have a given behaviour in the presence of such substances is fixed to the object to be marked in a non identifiable way by the human eye. A detection by animals such as Canidae and insects (cockroaches, bees and butterflies) can be used; odorant substances will consist particularly of substances which may be detected specifically and spontaneously by an animal at extremely low threshold values (alpha-ionone for Canidae) or pheromonal (sexual or warning) substances which modify the behaviour of an animal placed at a distance.
Patent FR-2610697-A1 (FR)
Title: Enveloppe de matiere plastique pour tuyauterie
Inventor: KARAKAWA KAZUO
IPC: F16L59/147
Filed: 1988-02-09
Abstract: A) ENVELOPPE DE MATIERE PLASTIQUE POUR TUYAUTERIE. B) ENVELOPPE CARACTERISEE EN CE QU'ELLE COMPREND UN CORPS D'ENVELOPPE 3 EN MATIERE PLASTIQUE ET UNE NERVURE 4 LE LONG D'UN BORD LATERAL 3A DU CORPS 3 DANS LE SENS LONGITUDINAL, LA NERVURE 4 SOLIDAIRE DU CORPS 3 COMPRENANT UNE PARTIE DE PIED 4A RELIEE AU CORPS 3 ET UNE PARTIE DE BRANCHE RELIEE A L'AUTRE EXTREMITE DU PIED 4A POUR DEFINIR UNE RAINURE EXTERIEURE 4C MUNIE D'UN PREMIER DISPOSITIF D'ENGAGEMENT 4D SUR LA SURFACE INTERIEURE DE LA PARTIE DE BRANCHE, UN SECOND DISPOSITIF D'ENGAGEMENT 5 ETANT FORME SUR LA SURFACE EXTERIEURE DE L'AUTRE BORD LATERAL 3B DU CORPS 3 POUR VENIR S'ENCLENCHER AVEC LE PREMIER DISPOSITIF D'ENGAGEMENT 4D DANS LA RAINURE 4C, DE FACON QUE LE CORPS D'ENVELOPPE 3 PRENNE LA FORME D'UN CYLINDRE. C) L'INVENTION S'APPLIQUE NOTAMMENT AUX TUYAUTERIES INTERIEURES DE SYSTEMES DE CONDITIONNEMENT D'AIR.
Patent FR-2628429-A1 (FR)
Title: Variants de l'hirudine, leurs utilisations et les procedes pour les obtenir
Inventor: COURTNEY MICHAEL
IPC: C12N15/00
Filed: 1988-03-08
Abstract: Variants de l'hirudine créés artificiellement dans le but d'améliorer leurs propriétés pharmacocinétiques.
Patent FR-2634929-A1 (FR)
Title: Dispositif d'aide a la circulation
Inventor: ARCHAMBAULT YVES
IPC: G08G1/0962
Filed: 1988-07-28
Abstract: Dispositif d'aide à la circulation, comprenant un émetteur et un récepteur orientés dans la même direction, un circuit de traitement de l'information reçue par le récepteur, et des moyens de commande, signalisation et/ou alarme. Selon l'invention, le récepteur 2 reçoit le faisceau émis par l'émetteur 1, après réflexion sur des surfaces R portant un marquage codé au sol ou sur panneaux. Applications : circulation routière, ferroviaire, atterrissage ou décollage des aéronefs, etc.
Patent FR-2636911-A1 (FR)
Title: Systeme assurant la securite d'une personne tombee a la mer
IPC: B63C9/00
Filed: 1988-09-23
Abstract: Le dispositif comprend une source de signaux acoustiques 2 placée sous la coque du bateau 1, une balise 3, un boîtier d'alarme 6 porté autour du cou par le navigateur. En cas de chute du navigateur à la mer, un capteur acoustique intégré au boîtier 6 détecte l'émission de la source 6 et télécommande par radio le largage de la balise. Celle-ci comprend une tête de mesure munie d'un capteur acoustique directionnel et d'un compas propre à calculer des informations de position de la balise, transmises par radio à un coffret de commande 4 fixé dans le bateau. La balise étant supposée voisine du naufragé, on retrouve ainsi ce dernier.
Patent WO-8907744-A1 (WO)
Inventor: COUDERC GEORGES
IPC: G01S17/58
Filed: 1989-02-17
Abstract: L'invention concerne un système qui permet de corriger la trajectoire d'un projectile, notamment d'un obus, de manière qu'il atteigne un objectif qui lui a été désigné. L'invention réside dans le fait que le système comprend un radar optique (10) comportant un laser (16) émettant dans l'infrarouge qui permet, en association avec un dispositif de traitement (11), de suivre en même temps les déplacements de la cible et du projectile. Les informations fournies par le dispositif de traitement (11) permettent de calculer dans un calculateur (9) les corrections à effectuer à la trajectoire du projectile (2) dans une phase finale pour qu'elle rejoigne la cible (4). L'invention est applicable aux systèmes de conduite de tir d'obus et d'engins auto-propulsés.
Patent FR-2643789-A1 (FR)
Title: Process and installation for the survival and preservation of Norway lobsters
IPC: A01K63/00
Filed: 1989-03-03
Abstract: The invention relates to a process and an installation for the survival and preservation of Norway lobsters. This process consists in placing the freshly caught Norway lobsters on shelves 11 and in spraying them with atomised and oxygenated water. The invention also relates to the installation on board or on land which permits the implementation of the process. A sealed vessel 12 receives the shelves 11 and comprises a ramp 9 bringing the water removed in situ from the sea, and the air under pressure respectively to the injectors 16 which spray this water, and to the nozzles 31 which provide the air required for the oxygenation. The invention finds its application in any equipment on board a fishing boat or a land installation.
Patent FR-2647776-A1 (FR)
Title: Materiau pour confiner a l'etat solidifie des metaux lourds et des ions metalliques
Inventor: SASAE TAIICHIO
IPC: C02F11/00
Filed: 1989-05-31
Abstract: Ce matériau pour le traitement des métaux lourds et des ions métalliques contient, comme composants principaux, de la chaux vive et du ciment, et il contient également, par rapport à la chaux vive et au ciment, 0,05 à 0,35 % en poids de chlorure de potassium, 0,03 à 0,20 % en poids de chlorure de magnésium, 0,03 à 0,20 % en poids de chlorure de sodium, 0,03 à 0,25 % en poids de chlorure de calcium, 0,00002 à 0,01 % en poids de chlorure de cobalt, 0,00002 à 0,01 % en poids d'acide citrique et 0,001 à 0,02 % en poids de sulfate de sodium. Les métaux lourds et les ions métalliques nocifs contenus dans les effluents, les bouillies et les boues peuvent être confinés de façon sûre et à faible coût dans un état dans lequel leur élution est empêchée. Un revêtement par un acide gras peut être formé sur la surface de la chaux vive.