baber/WOPTO huggingface dataset:
Patent FR-2480535-A1 (FR)
Title: Sunlit graphical display arrangement - has panel contg. parallel ridges oriented to form isosceles triangle to produce two-dimensional shadow
Inventor: GITTON BERNARD GEORGES
IPC: G09F13/16
Filed: 1980-04-15
Abstract: The assembly displays a message, e.g. on the side of a building, in dependence on the incident sunlight and consists of an element having a series of parallel ridges formed on one surface. The series extends at different angles to one another. The ridges preferably have a isocelese triangle cross-section with a 30 degree base angle. Then the incident light has a wavelength interior to the ridge dimension and is incident at different angles to the two series to produce different dimension shadows, the differences produce the image which disappears in dull light. The ridges are of the same height, differing only in their orientation.
Patent FR-2456939-A1 (FR)
Title: Lighting of graduated scale in spherical compass - is effected by reflection of lamp light onto transparent plastics cover (SE 15.12.80)
Inventor: MEILING HOLGER HUGO
IPC: G01C17/24
Filed: 1980-04-29
Abstract: A section of a graduated scale on a spherical compass is illuminated by a lamp which does not impede reading of the graduation marks. This overcomes the problem of locating and mounting mirrors on the assembly. A spherical compass comprises a spherical capsule (1) formed from two halves (1a,1b) one of which is made of transparent plastic. The two halves are hermetically sealed by a mounting assembly (2) comprising two rings. A front plate (3) is mounted on the ring assembly and a rear cover (5) can be displaced towards the ring assembly by means of screws (6) to provide a partial cover. A section of a scale on a card (10) in the compass capsule is illuminated by a lamp (12) so that the confidence lines (7c) can be illuminated by reflection from the transparent cover.
Patent FR-2449078-A1 (FR)
Title: Procede de production d'acide threo-3-amino protege 2-hydroxy-4-oxobutanoique ou de ses esters et application a la production d'acide threo-3-amino-2-hydroxybutanoique
IPC: A61K31/16
Filed: 1980-05-12
Abstract: LA PRESENTE INVENTION A POUR OBJET UN PROCEDE DE PRODUCTION D'ACIDE THREO-3 AMINO PROTEGE 2-HYDROXYBUTANOIQUE OU DE SES ESTERS. CE PROCEDE CONSISTE A FAIRE REAGIR LA 2-OXOETHYLAMINE N-PROTEGEE AVEC UN COMPOSE DE FORMULE: (CF DESSIN DANS BOPI) DANS LAQUELLE :R EST UN GROUPE NAPHTYLE OU UN GROUPE: (CF DESSIN DANS BOPI) OU R ET R ONT UNE SIGNIFICATION DEFINIE,AVEC L'ACIDE GLYOXYLIQUE OU SES ESTERS, EN VUE DE PRODUIRE L'ACIDE THREO-3-AMINO PROTEGE 2-HYDROXY-4-OXOBUTANOIQUE OU SES ESTERS, PUIS A REDUIRE CE COMPOSE EN UN ACIDE THREO-3-AMINO PROTEGE 2-HYDROXYBUTANOIQUE OU SES ESTERS. APPLICATION DE CES COMPOSES NOTAMMENT A LA PREPARATION DE L'ACIDE THREO-3-AMINO-2 HYDROXYBUTANOIQUE.
Patent FR-2483563-A1 (FR)
Title: Tube or pipe clip - has flexible segment attached to base by stud under segment
Inventor: HETZEL JEAN-PIERRE
IPC: F16L3/13
Filed: 1980-05-28
Abstract: The pipe clip consists of a base cylinder (3) with a flat base, so that it can rest on a support plate (1). The plate has a number of holes (3). The lower part of the cylinder has a pin (7) with an expanding head (8) which can pass through the hole in one direction. The pipe (6) is held in an integral segment (5) which sits on the top of the base cylinder. The opening of the segment is 110 deg. and the inner radius is equal to the outer radius of the pipe.
Patent FR-2486401-A1 (FR)
Title: Installation to clean and disinfect vertical rubbish chute - with downward brushing followed by dusting with powder on the way up
IPC: A61L2/16
Filed: 1980-07-08
Abstract: Adjacent to the top of the shaft is provided an electrical supply point and a horizontal supporting runway for a winch carriage. The winch has a winding drum for a cable which passes over a pulley at the end of a cantilever jib extending horizontally from the carriage. The carriage can be moved along the runway so that the pulley is centred over the shaft. The cable free end is fitted with a mounting for a brush which just fits the inside of the shaft. As the mounting is lowered down the shaft, the brush bristles sweep clean the walls of the shaft. The cable is not only load-bearing but also carries a low voltage, e.g. 24 volts, supply to the brush mounting. The mounting contains a reservoir for disinfectant, deodoriser, etc. This is distributed by a centrifugal spinner, below the brush, driven by an electric motor in the brush mounting. After brush-cleaning the shaft on the way down, the mounting centrifugal spinner is switched on to dust the walls with treatment powder on the way up. After shaft cleaning, the brush mounting is wound fully up, the carriage rolled back and the complete unit fitted with a box cover. The carriage can be detached from the runway to be transferred to clean another shaft. The installation is partic. useful for cleaning and disinfecting the inside of a rubbish chute serving many floors in a block of flats.
Patent FR-2487912-A1 (FR)
Title: Ensemble ventilateur et de prise de force pour moteur thermique
Inventor: HOYER FRANCIS LUCIEN EUGENE
IPC: F02B3/06
Filed: 1980-07-30
Abstract: L'ENSEMBLE VENTILATEUR ET DE PRISE DE FORCE POUR MOTEUR THERMIQUE COMPORTE DES MOYENS DE SUPPORT 3A POUR UN VENTILATEUR 19 ET 4B POUR UNE PRISE DE FORCE 28 QUI SONT DISPOSES EN PORTE-A-FAUX AU-DELA DU VILEBREQUIN 1 D'UN MOTEUR THERMIQUE QUI LES PORTE.
Patent FR-2488612-A1 (FR)
Title: Polyester resin compsn. for pultrusion - contg. cellulose aceto-butyrate to give increased rate of pultrusion
Inventor: MCQUARRIE TERRY S
IPC: C08L67/06
Filed: 1980-08-12
Abstract: Pultrusion process uses a polyester resin compsn. comprising (A) 40-60 pts. of a polyester made by condensn. of a mixt. of (a) 65-85 mole % of an alpha, beta-unsatd. diacid or anhydride; (b) is approx. 15-35 mole % of a satd. diacid or anhydride; and (c) =110 mole % of a glycol to give a polyester with an equiv. wt. of alpha, beta-unsatn. of nearly equals 200-275 and a compatibility w.r.t. the monomer of =25%; (B) 40-60 pts. of a monomer (mixt.) which is copolymerisable with the polyester, such that (A) + (B)= 100 and the cured polyester has a Barcol hardness of >=45; and (C) 4-10 pts. of a cellulose acetobutyrate resin which is soluble in the polyester resin and which renders the mixt. opaque when it is cured. Use of the resin compsn. allows pultruded prods. to be made in the usual way but with considerably higher rates of pultrusion than with prior art resin compsns.
Patent FR-2466662-A1 (FR)
Title: Insulating panel bolted joint for switchgear - uses flanged bush inside hole through panel to house spring washers on bolt
Inventor: FRIEDRICH WERNER
IPC: F16B39/24
Filed: 1980-09-19
Abstract: The bolted joint between a metal part (1) and an insulation material part (2) for e.g. h.v. switchgear, includes spring washers (9) to compensate for differences in expansion. The joint is designed to reduce the possibility of electrical breakdown. The bolt (11) passes through the spring washers which are housed inside a cup-shaped sleeve (10), fitting into a hole (6) through the insulating member (2), then through a clearance hole in the metal part. The sleeve has a flange (8) around its open end, which limits its depth of entry inside the first hole. In another design, the springs are fully compressed inside the sleeve, and a washer is placed between the bolt head and the sleeve flange. In another variation, the flange also encloses the washer.
Patent FR-2493448-A1 (FR)
Title: Flexible steel pulley belt - has arcuate section and is fabricated from laminated steel sheets
IPC: F16G5/22
Filed: 1980-10-31
Abstract: The pulley belt is fo use with a variable speed drive and is fabricated from thin steel laminations. The steel belt has a slightly curved cross section with tapering sides to match the angle of the pulley. The belt is flexible enough to curve around the vaiable diameter pulley but rigid along the straight sections. The torque is transmitted by tension in one side of the belt and compression in the other side. To increase the transmitted torque further the steel can be magnetized in order to prevent slipping between the belt and pulley.
Patent FR-2473801-A1 (FR)
Title: Bloc de diodes
Inventor: FRISTER MANFRED
IPC: H01L25/04
Filed: 1980-11-27
Abstract: a. Bloc de diodes pour redresseur de courant 13 pourvu d'un élément de refroidissement 18 notamment pour alternateur triphasé 11 de véhicules automobiles, où sont insérées en colonne, dans un évidement approprié ménagé dans l'élément de refroidissement, comme diodes de redressement, au moins une diode positive 15 et au moins une diode négative 14, ainsi que des pièces de raccordement et des moyens d'isolation. b. Caractérisé par une diode Zener 16 qui est montée dans la colonne entre les branchements de sortie 18, 22 des diodes de redressement 14, 15 qui lorsque ces diodes sont en fonctionnement normal, est polarisée dans le sens de non-conduction, et dont la valeur de tension de claquage se situe au-dessus de la tension de sortie prévue des diodes de redressement 14, 15. c. Dispositif applicable notamment aux installations électriques de véhicules automobiles. (CF DESSIN DANS BOPI)
Patent FR-2470630-A1 (FR)
Title: Air filters prodn. system - involves applying hot adhesive to strip edges and folding in accordion pleats
Inventor: MANCINO DINO
IPC: B01D29/07
Filed: 1980-11-28
Abstract: In making air filters from continuously moving strip, hot melt adhesive is first applied to the edges, and the strips is then folded in accordeon manner to bring the adjacent coated strip edges into simultaneous contact. Pressure on the glued edges is maintained for a period while the strip is advanced on a conveyor, resulting in parallelepipedal pockets. Before adhesive application a set of rollers have provided the strip with transverse creases to aid folding and also with projection and recesses which prevent the pocket walls coming into close contact. The folded strip is cut into lengths with a pre-determined number of pockets, forming a filter unit which has its top enclosed in a frame to form a sealing flange. Pref. the adhesive is polyester-based. The appts. has relatively large output in a given period.
Patent FR-2495136-A1 (FR)
Title: Procede de preparation de l'hydroxycitronellal par isomerisation catalytique
Inventor: AKUTAGAWA SUSUMU
IPC: C07D295/084
Filed: 1980-11-28
Abstract: Procédé de préparation de l'hydroxycitronellal. On isomérise une 7-hydroxygéranylamine de formule I ou une 7-hydroxynérylamine de formule II : (CF DESSIN DANS BOPI) dans lesquelles R1 et R2 représentent chacun un groupe alkyle en C1-C6 ou cycloalkyle ou bien forment ensemble et avec l'atome d'azote voisin un cycle à 5 ou 6 chaînons qui peut contenir d'autres atomes d'azote et/ou d'oxygène, sur un catalyseur constitué d'un composé du palladium divalent et d'un dérivé de phosphine, isomérisation donnant la 7-hydroxyaldéhydoénamine III : (CF DESSIN DANS BOPI) qu'on soumet à hydrolyse.
Patent FR-2495512-A1 (FR)
Title: Resilient thread forming and tool - by displacing groove metal to deepen this prior to two stage groove and thread forming
Inventor: TOROPOV GENNADY ALEXANDROVICH
IPC: B21H3/08
Filed: 1980-12-09
Abstract: Resilient thread forming involves plastic deformation of metal in a preformed helical groove. The depth of this groove exceeds the root depth in the end product thread, obtained by displacing a volume of metal equal to the closed space within the product thread. This increases the resilience and tolerance in the product thread and at the same time reduces torque during the products thread forming operation which follows. The tool, e.g. a tap, has a shank (1) and two stage (3,4) forming head with identical thread crest pitch offset by one half pitch axially. The outside dia. (d1) of the grooving stage (3) is larger than that (d2) of the thread forming stage (4). The grooving stage lies upstream of the thread stage, viewed from the shank and the thread stage in this instance has an entry or lead-in sector where it joins the grooving stage. It is possible to use equi-spaced peripheral rollers for both stages, the rollers having a ring thread of the same pitch as the product thread.
Patent FR-2497575-A1 (FR)
Title: Dispositif manosensible de prise de pression statique et mat anemometrique, notamment pour aeronef
Inventor: GIBERT FRANCIS
IPC: G01L19/02
Filed: 1981-01-08
Abstract: L'INVENTION CONCERNE LA MESURE DE LA VITESSE DES AERONEFS. ELLE SE RAPPORTE A UN MAT ANEMOMETRIQUE AYANT UN CORPS 10 DONT L'EXTREMITE 14 FORME UN DISPOSITIF DE PRISE DE PRESSION STATIQUE. SELON L'INVENTION, CE DISPOSITIF COMPORTE AU MOINS UN ORIFICE 22 FORME DANS UNE SURFACE DE REVOLUTION AUTOUR D'UN AXE A, AU MOINS DANS UN SECTEUR CIRCULAIRE 28 DONT L'ETENDUE CORRESPOND AU MOINS A LA PLAGE DE VARIATIONS ANGULAIRES DU VECTEUR VITESSE. APPLICATION A LA MESURE DE LA VITESSE DES AERONEFS.
Patent FR-2499348-A1 (FR)
Title: Dispositif de calibration de transducteurs ultrasonores
IPC: H04R29/00
Filed: 1981-02-02
Abstract: DISPOSITIF DE CALIBRATION DE TRANSDUCTEUR ULTRASONORE DANS LEQUEL ON IMMERGE DANS UNE CUVE 4 UN TRANSDUCTEUR 1 DIT DE CALIBRATION, UNE PLAQUE PLANE RIGIDE 2 APPUYEE PAR UN DE SES BORDS, EN FORME DE BISEAU, CONTRE LA FACE AVANT DU TRANSDUCTEUR 1 DE FACON A N'APPORTER AUCUNE PERTURBATION A LA DISTRIBUTION DES VITESSES ULTRASONORES, UNE BILLE RIGIDE 3 ENCASTREE SUIVANT UN PLAN DIAMETRAL DANS LA PLAQUE 2, ET LE TRANSDUCTEUR 5 A CALIBRER, DEPLACABLE DE FACON QUE LES POINTS OU L'ON VEUT MESURER LA PRESSION ULTRASONORE PUISSENT AU COURS DES MESURES COINCIDER AVEC TOUT POINT SITUE DANS LA BILLE 3 OU A SON VOISINAGE. APPLICATION: ECHOGRAPHES UTILISES EN MEDECINE.
Patent FR-2500993-A1 (FR)
Title: Device for loading and cleaning root crops - has vertical cage mounted on wheeled chassis housing vertical archimedean screw
IPC: A01D51/00
Filed: 1981-03-04
Abstract: The root crop harvester is hitched to a tractor and comprises a wheeled chassis (1) on which a cage (5) defined by longitudinal bars (7) is mounted. The cage has an upper (23) and a lower (19) opening defined by the bars providing an outlet and an inlet for the crops. An Archimedean screw (11) is mounted vertically within the cage to raise the crops. The front end of the screw is extended downwards and has a rotatable disc (16) mounted on it for gathering up the feet or potatoes from the ground. The dia. of the disc is equal to that of the cage and its upper surface is swept by the lower edge of the rotating screw.
Patent FR-2502445-A1 (FR)
Title: Folding rail-mounting electrical junction box - comprises two hollow halves hinged together by flexible tongues with flexible ribbon cable linking circuit cards within halves
Inventor: BORNE ANDRE
IPC: H05K5/00
Filed: 1981-03-18
Abstract: Two circuit cards (8A,8B) are mounted in a housing which clips onto a rail by means of shaped clasps (4A1 4A2 4A3). The housing is made in the form of two complementary hollow halves (2A,2B) which fold about a common hinge poing (3A,3B). The hinges are in the form of flexible tongues. Electrical connector elements (5A1,--5AN) are assembled in one half of the folding housing. The housing is made of an insulating plastics material and the two halves snap together by means of an inter-locking pin and cavity (6B2, 7A1) arrangement. When closed, the two halves form a completely enclosed box. A flexible ribbon cable (9) links the circuit cards ib the two halves. Screw-type wire terminals fitted in one half (5A1,5A2) fit into recesses (OB1,12B2) moulded on the other half.
Patent FR-2502107-A1 (FR)
Title: Navire de transport a deux cales de chargement
Inventor: BONNAFOUS GUY
IPC: B63B11/02
Filed: 1981-03-20
Abstract: L'INVENTION CONCERNE LES NAVIRES DE TRANSPORT A DEUX CALES DE CHARGEMENT, ET PLUS PARTICULIEREMENT LES NAVIRES DE TRANSPORT DE GAZ LIQUEFIE. UN NAVIRE DE TRANSPORT A DEUX CALES DE CHARGEMENT 3, 4 OBJET DE L'INVENTION SE CARACTERISE EN CE QUE LES DEUX CALES DE CHARGEMENT 3, 4 SONT SEPAREES PAR UN ESPACE INTERMEDIAIRE 5 DEFINI PAR DEUX CLOISONS 7A, 7B ETANCHES ET TRANSVERSALES. LA DISTANCE 1 SEPARANT CES DEUX CLOISONS ETANCHES 7A ET 7B EST AU MOINS EGALE A LA LONGUEUR CONVENTIONNELLE DE BRECHE DEFINIE PAR LA REGLEMENTATION INTERNATIONALE. AINSI, EN CAS D'AVARIE, LE NAVIRE DE TRANSPORT DE L'INVENTION A UNE CAPACITE DE SURVIE CONFORME A LA REGLEMENTATION INTERNATIONALE. L'INVENTION S'APPLIQUE NOTAMMENT A LA CONSTRUCTION DE NAVIRE DE TRANSPORT.
Patent FR-2478844-A1 (FR)
Title: Micrometre mu par moteur
Inventor: EDELSTEIN ARTHUR
IPC: G01B3/18
Filed: 1981-03-23
Abstract: L'INVENTION APPARTIENT AU DOMAINE DES DISPOSITIFS POUR REGLER AVEC PRECISION UN MOUVEMENT OU UN DEPLACEMENT. ELLE A POUR BUT DE FOURNIR UN MICROMETRE A MOTEUR QUI SOIT A LA FOIS SIMPLE ET FACILEMENT MINIATURISABLE. UN APPAREIL SELON L'INVENTION COMPORTE UNE VIS 42 ET UN MOTEUR 30 QUI SONT REUNIS DE FACON A SE DEPLACER LONGITUDINALEMENT D'UN SEUL TENANT, LA VIS ETANT VISSEE DANS UN ECROU 14, FIXE AU SUPPORT OU BOITIER 12 DU MICROMETRE, QUI LA SUPPORTE. UNE CLAVETTE IMMOBILISE LE MOTEUR 30 EN ROTATION PAR RAPPORT AU SUPPORT OU BOITIER 12, TOUT EN LUI PERMETTANT DE SE DEPLACER LONGITUDINALEMENT DANS CE DERNIER, GRACEPAR EXEMPLE A UNE CLAVETTE SE DEPLACANT DANS UNE FENTE LONGITUDINALE DU BOITIER QUI PERMET AUSSI UN REPERAGE DE POSITION. L'INVENTION EST UTILISABLE POUR REGLER LA POSITION D'UNE PLATINE DE MICROSCOPE.
Patent FR-2502635-A1 (FR)
Title: Dry quenching coke with concurrent prodn. of reducing gas - in two-stage process using steam as coolant in final stage
Inventor: PRIVALOV VASILY EFIMOVICH
IPC: C10B39/02
Filed: 1981-03-24
Abstract: Process and appts. are claimed for dry quenching coke, the method comprising (a) heating the coke to 1200-1300 deg.C, (b) cooling the coke by passing through a layer of the coke a mixt., preheated to 90-100 deg.C, of (i) steam and (ii) one or more hydrocarbons (I), this stage yielding a product gas contg. H2 and CO, and (c) cooling the coke to 200-250 deg.C by passing steam through the layer. The steam (I) volume ratio in the coolant of step (b) is 1.05-1.1:1. The process has reduced capital and lower requirements and uses simple and explosion-proof appts. to provide high-quality coke and reducing gas. Use of steam as the coolant in the final stage allows substitution of a cheaper trickle cooler for the usual waste heat boiler.
Patent FR-2479899-A1 (FR)
Inventor: IACOPONI STEFANO
IPC: F02B37/22
Filed: 1981-04-02
Abstract: Turbocharger fed by the engine exhaust gases for internal combustion engines with an auxiliary device designed, for example, as an electric motor, by means of which the turbocharger is kept at a high number of revolutions even in phases of reduced exhaust gas flow.
Patent FR-2509522-A1 (FR)
Title: Bistable relay circuit for battery backed lighting supply - utilises three independent DC supply sources and double pole changeover monitoring relay
Inventor: SORET MICHEL
IPC: H02J9/02
Filed: 1981-04-15
Abstract: The circuit allows a battery of accumulators to be kept charged, to be switched out of service if excessive discharge occurs and for the state of battery supervision to be changed. A bistable relay (2), which reacts by inverting its pairs of contacts (18-19, 21-22 or 20-19, 23-22) when a pulse of appropriate polarity is applied to its winding (25-26). The primary source of supply is the rectified mains. When this is connected, then a second relay (1) changes its contacts (9-8) which has the effect of switching over the contacts of the bistable relay (2). The output circuit is now mains-powered and the battery receives charge. If the battery voltage should drop below a predetermined threshold due to discharge, a Zener-diode (12) controlled transistor chain (13,14) sets up a voltage across the bistable relay coil (25-26) which switches its contacts and effectively removes the battery from the circuit. A resistor (16) serves to adjust the response of the bistable relay. A third, remote electrical supply is able to send pulses to the bistable relay to switch over its contacts.
Patent FR-2504450-A1 (FR)
Title: Helical strip profiles with sealant alongside intermediate joints - to seal walls of composite container bodies
Inventor: ROBIN CLAUDE
IPC: B29C65/00
Filed: 1981-04-22
Abstract: Hollow profiles made by overlapping helical winding of flexible strip material on to a cylindrical mandrel include a strip of sealant material along the face of one of the strips to align with the border of a coaxial joint. Esp. claimed for fabricating composite bodies for containers involving at least one barrier material layer within a jacket layer of flexible card or 'kraft' paper. Esp. suitable for formats where the borders of at least one of the constituent layer is folded for bonding to the like surface of the similar strip (e.g. for a metal/metal or plastic/plastic joint where the internal layer comprises a paper or metal (aluminium) lining with a thermoplastic coating of e.g. polyolefin, PVDC or polyester to cover any cracks or voids introduced by folding the border of the strip.
Patent FR-2485649-A1 (FR)
Title: Circuit d'asservissement hydraulique pour la commande d'actionneurs hydrauliques
Inventor: FERGUSON JOHN HOWARD JR
IPC: F15B11/08
Filed: 1981-06-19
Abstract: CIRCUIT D'ASSERVISSEMENT HYDRAULIQUE POUR LA COMMANDE D'ACTIONNEURS HYDRAULIQUES, COMPRENANT UNE POMPE D'ACTIONNEMENT 16 FOURNISSANT UN FLUIDE MOTEUR HAUTE PRESSION A UN ACTIONNEUR HYDRAULIQUE 28 PAR L'INTERMEDIAIRE DE CONDUITES DE TRANSMISSION 24, 26 EN REPONSE A DES SIGNAUX DE COMMANDE RECUS D'UNE SERVO-VALVE DE COMMANDE 10, UNE POMPE DE CHARGE 36 FOURNISSANT UN FLUIDE D'ASSERVISSEMENT A UNE PRESSION INFERIEURE A LA PRESSION MAXIMALE DU FLUIDE MOTEUR, ET UNE VALVE PENDULAIRE A TROIS POSITIONS 34 RELIANT LA SORTIE DE LADITE POMPE DE CHARGE A L'UNE DES CONDUITES DE TRANSMISSION OU AUX DEUX, SELON QUE L'AUTRE EST ALIMENTEE OU NON EN FLUIDE HAUTE PRESSION. AFIN D'ACCROITRE LA RAIDEUR DU PISTON DE L'ACTIONNEUR 30 AUX INFLUENCES DES FORCES EXTERIEURES, L'INVENTION PREVOIT L'EMPLOI D'UN DISPOSITIF REDUCTEUR DE PRESSION A ACTION PROGRESSIVE 44, 48, 50 QUI REDUIT AUTOMATIQUEMENT LA PRESSION DU FLUIDE D'ASSERVISSEMENT EN RAISON INVERSE DE LA PRESSION DU FLUIDE MOTEUR QUI EST FOURNI A L'UNE OU A L'AUTRE DES CONDUITES DE TRANSMISSION. APPLICATION AUX SYSTEMES A COMMANDE HYDRAULIQUE, ET NOTAMMENT AUX SERVOMECANISMES D'AVIATION.
Patent FR-2508216-A1 (FR)
Title: Tete magnetique pour ecriture, lecture et effacement sur piste magnetique etroite, et procede de fabrication de cette tete magnetique, simple ou multipiste
Inventor: NICOLAS JEAN
IPC: G11B5/133
Filed: 1981-06-19
Abstract: L'INVENTION CONCERNE LES TETES MAGNETIQUES DESTINEES A EXPLOITER DES PISTES TRES ETROITES 30 A 50 U SUR SUPPORTS MAGNETIQUES DEFILANT. TANDIS QU'UNE TETE MAGNETIQUE CLASSIQUE COMPORTE UNE FACE DE TRAVAIL CONSTITUEE D'UN MATERIAU MAGNETIQUE DANS LEQUEL SE TROUVE UN FIN ENTREFER NON MAGNETIQUE, LA TETE MAGNETIQUE SELON L'INVENTION COMPORTE AU CONTRAIRE UNE FACE DE TRAVAIL CONSTITUEE D'UN MATERIAU NON MAGNETIQUE 10 11 12 DANS LEQUEL SONT INCLUSES DEUX FINES COUCHES MAGNETIQUES 7, SEPAREES PAR UN ENTREFER, ET PERPENDICULAIRES A LA FACE DE TRAVAIL. CETTE TETE EST OBTENUE EN LIANT PAR PRESSAGE A CHAUD SUR UNE TRANCHE 21 DE MATERIAU NON MAGNETIQUE UNE LAME 20 ELLE-MEME COMPOSEE DE COUCHES MAGNETIQUE 16 ET NON MAGNETIQUE 17: LA LAME 20 AINSI SUPPORTEE EST RODEE JUSQU'A OBTENIR UNE EPAISSEUR EGALE A LA LARGEUR DE PISTE. APPLICATION AUX TETES MULTIPLES ET MULTIPISTES, POUR L'INFORMATIQUE ET L'AUDIOVISUEL.