baber/WOPTO huggingface dataset:
Patent FR-2438878-A1 (FR)
Title: Appareil d'aide a la navigation destine a eviter les collisions
IPC: G01S13/93
Filed: 1979-05-09
Abstract: L'INVENTION CONCERNE UN APPAREIL DESTINE A EVITER LES COLLISIONS. ELLE SE RAPPORTE A UN APPAREIL DANS LEQUEL UN DISPOSITIF 7 D'AFFICHAGE INDIQUE UNE ZONE POSSIBLE DE DANGER 19 CORRESPONDANT A UNE COLLISION POSSIBLE DU NAVIRE CONSIDERE 6 AVEC UN NAVIRE 5 QUI DOIT RECOUPER SA ROUTE. LA ZONE DE DANGER EST DELIMITEE PAR DES SEGMENTS DE DROITE FIXES D'APRES LES POSITIONS ET VITESSES RELATIVES DES DEUX NAVIRES ET D'APRES UNE DISTANCE DE RAPPROCHEMENT MINIMALE. APPLICATION AUX APPAREILS DE NAVIGATION DES NAVIRES.
Patent FR-2430068-A1 (FR)
Title: Element degageant un gaz de marquage
IPC: G21C17/07
Filed: 1979-06-22
Abstract: L'invention a trait à un élément dégageant un gaz de marquage. Elle a pour objet un élément dégageant un gaz de marquage contenu dans un barreau de combustible nucléaire pour libérer un gaz de marquage en vue de détecter un barreau de combustible défectueux. L'élément comporte un matériau solide inorganique renfermant le gaz de marquage. Le gaz de marquage est constitué par un gaz rare et est retenu dans le matériau solide inorganique par injection ou adsorption. Application notamment aux réacteurs nucléaires.
Patent FR-2460573-A1 (FR)
Title: Digital data transmission system for e.g. emergency vehicle - uses clock and information pulses to periodically reduce line voltage levels, with pulses recovered separately at remote unit
Inventor: LANGLAIS GEORGES BAILLEUL
IPC: H04L25/02
Filed: 1979-07-04
Abstract: In the transmission of digital information from a central unit such as a microprocessor to a peripheral unit in, for example, an automobile the central unit has a constant current source (3) coupling a set voltage + Vb to an information transmission line (8) to the peripheral unit. The current source output is started to earth through a transmitter (7) by the information pulses (10) while clock pulses (9) trigger a further transmitter (1) to reduce the output to a lower voltage level +Vz through a series zener. The two trains are separated at the peripheral unit by two comparators (12,13) responding to different line voltage threshold levels. The separated clock pulses and further information pulses control a transitor through an AND gate (16) and return the further information along a second line (18) to the central unit, the information being retrieved by a level comparator. The transistor power is derived along the second line from the central unit. The system uses a central clock and power source giving better protection and noise control.
Patent FR-2430188-A1 (FR)
Title: Ensemble de nettoyage pour moissonneuse-batteuse
IPC: A01D67/00
Filed: 1979-07-09
Abstract: Cette invention concerne un ensemble de nettoyage pour moissonneuse-batteuse. Au moins une soufflerie est prévue dans la partie avant du rotor de battage et de séparation et alimente ce rotor ou bien à la fois le rotor et l'ensemble de nettoyage en air. L'ensemble de nettoyage est monté dans un carter dont l'orifice de sortie a une section droite inférieure à celle de l'orifice d'entrée, de manière à créer une surpression à l'intérieur dudit carter. Un agencement de ce type est utilisable notamment sur les moissonneuses-batteuses à acheminement axial des produits de récolte.
Patent FR-2440466-A1 (FR)
Title: Aube de turbomachine perfectionnee
IPC: B23P15/04
Filed: 1979-07-26
Abstract: AUBE DONT LES ELEMENTS DE BANDEAU ONT UNE RESISTANCE ACCRUE A L'USURE PAR ADHERENCE. ELLE COMPREND UNE PALE 12 QUI COMPORTE UN ORGANE SAILLANT 10 DESTINE A VENIR EN BUTEE CONTRE LA SURFACE D'UN ORGANE ADJACENT ET MUNI SUR SA SURFACE DE CONTACT D'UN TAMPON D'USURE 16 EN CARBURE, NITRURE OU BORURE COMPACTE, FRITTE, DE DENSITE MAXIMALE, CE TAMPON AYANT UNE EPAISSEUR D'AU MOINS 0,25MM, PRESENTANT DES CARACTERISTIQUES DE RESISTANCE A L'USURE PAR ADHERENCE ET DE RESILIENCE ACCRUES ET AYANT UN COEFFICIENT DE DILATATION THERMIQUE COMPATIBLE AVEC CELUI DE L'ORGANE SAILLANT. APPLICATION AUX MOTEURS A TURBINES A GAZ.
Patent FR-2435873-A1 (FR)
Title: Circuit de commande de l'extinction du faisceau electronique d'un tube cathodique de televiseur
IPC: H04N3/20
Filed: 1979-09-06
Abstract: La présente Invention concerne un circuit de commande de l'extinction du faisceau électronique d'un tube cathodique de téléviseur.  Elle est caractérisée par le fait que ce circuit comprend un comparateur de niveaux de tension CMP, un circuit de commande COM fournissant à la sortie un signal de commande lorsqu'un signal est présent sur l'une ou l'autre de ses deux entrées, un premier circuit de polarisation PLI fournissant à sa sortie une tension différente selon que le signal de retour de spot VI est absent ou présent; un second circuit de polarisation fournissant à sa sortie une tension différente selon que le signal à la sortie du comparateur est présent ou absent et un circuit de sortie SF constituant une borne de sortie Vo du circuit pour l'extinction du faisceau électronique.  L'invention s'applique en télévision.
Patent FR-2465562-A1 (FR)
Title: Appareil de blocage pour fixer un bloc metallique sur la face finie d'une ebauche semi-finie de lentille ophtalmique
Inventor: LOMBARD GERARD
IPC: B24B13/005
Filed: 1979-09-26
Abstract: APPAREIL DE BLOCAGE POUR FIXER UN BLOC METALLIQUE SUR LA FACE FINIE D'UNE EBAUCHE SEMI-FINIE DE LENTILLE OPHTALMIQUE PAR COULEE D'UN METAL A BAS POINT DE FUSION DANS UN MOULE PLACE AU CONTACT DE LA FACE FINIE DE L'EBAUCHE. LES PARTIES FIXE 4 ET MOBILE 5 DU MOULE 3, QUI PORTENT RESPECTIVEMENT LE SIEGE 9 POUR L'EBAUCHE L ET LES ELEMENTS EN RELIEF 18, SONT EN CONTACT DE ROTATION PAR DES SURFACES SPHERIQUES 16 FORMANT UN JOINT A ROTULE CENTRE SUR L'AXE 17 DU SIEGE 9. DES MOYENS DE COMMANDE 30, 31, 32 SONT RELIES A UN ARBRE 19, 29 SOLIDAIRE DE LA PARTIE 5 DU MOULE 3 POUR L'ORIENTER ET LA FAIRE BASCULER AUTOUR DU CENTRE C DU JOINT A ROTULE DE FACON A DONNER AU BLOC METALLIQUE LA VALEUR DESIREE DE PRISME ET L'ORIENTATION DESIREE DE L'AXE DU PRISME ET A ALIGNER LES ELEMENTS EN RELIEF 18 AVEC L'AXE DESIRE DE CYLINDRE.
Patent FR-2466262-A1 (FR)
Title: Condenseur pour la separation des substances solides contenues dans les melanges vapeurs-gaz et les pulpes formes lors de la fabrication de metaux des terres rares par chloration
Inventor: KALMYKOV VLADIMIR NIKANOROVICH
IPC: C22B7/02
Filed: 1979-09-28
Abstract: L'invention concerne la métallurgie. Le condenseur faisant l'objet de l'invention est caractérisé notamment en ce que la cloison transversale intérieure du corps cylindrique 1 est constituée par deux saillies verticales intérieures formées sur la paroi dudit corps et par un tambour vertical tournant 4 adjacent à ces saillies par sa surface extérieure et muni d'une tubulure 12 pour l'admission sur sa paroi intérieure de la pulpe contenant les métaux des terres rares, d'un dispositif 17 pour la répartition de la pulpe sur la paroi intérieure dudit tambour et pour le nettoyage de cette paroi, ainsi que d'une tubulure 20 pour le soutirage des substances solides à sa partie inférieure et d'un moyen pour l'évacuation des vapeurs dudit tambour. L'invention s'applique notamment à la fabrication de titane par chloration. (CF DESSIN DANS BOPI)
Patent FR-2440144-A1 (FR)
Title: Beet harvesting and cleaning machine - has endless conveyor discharging onto cleaning grid for transfer to adjustable angle delivery conveyor
IPC: A01D17/22
Filed: 1979-10-10
Abstract: The beet harvesting machine which also includes a sieving system for cleaning the lifted beets, has a conveying arrangement behind the sieving system. The lifting mechanism drives two lifting wheels with their axes of rotation at an acute angle to the ground, covering six rows of beets. These discharge into an endless conveyor which conveys the beets upwards for discharge onto a transfer conveyor which discharges them onto a collector vehicle. The endless conveyor forms a rectangle in a vertical plane, the horizontal top strand discharging onto a grid which slopes downwards, acting as a sieve, to discharge onto the lower end of the transfer conveyor. This not only slopes upwards, but it can be swung sideways to a required angle about a vertical pivot axis.
Patent FR-2440151-A1 (FR)
Title: Procede et installation d'irrigation mobile lateralement
IPC: A01G25/09
Filed: 1979-10-29
Abstract: A.PROCEDE POUR INSTALLATION COMPRENANT UN CHAPELET DE TUYAUX SUPPORTES PAR DES TOURELLES MOBILES POURVUES DE MOTEURS DEPLACANT LES TOURELLES EN CAS DE DEFAUT D'ALIGNEMENT ENTRE TUYAUX. B.CARACTERISE EN CE QU'ON ENTRAINE DEUX TOURELLES PRINCIPALES A VITESSES PRIMAIRES EGALES SUIVANT UN PROGRAMME, ON ENTRAINE LES AUTRES TOURELLES EN DEPENDANCE DES PREMIERES CHAQUE FOIS QUE L'ALIGNEMENT EST DEFECTUEUX, PAR RAPPORT A UNE TRAJECTOIRE DE REFERENCE EN REPONSE A UN SIGNAL DE CORRECTION PRODUIT PAR DES PALPEURS. C.INSTALLATION APPLICABLE A L'ARROSAGE AUTOMATIQUE DE GRANDES SURFACES.
Patent FR-2449920-A1 (FR)
Title: Mecanisme d'arret d'un moteur en fonction de la vitesse, pour un outil a fluide
IPC: B25B23/145
Filed: 1979-12-03
Abstract: L'INVENTION CONCERNE UN MECANISME D'ARRET DU MOTEUR D'UN OUTIL A FLUIDE, EN FONCTION DE LA VITESSE. LEDIT MECANISME COMPREND UN MOYEN 38, 40 CONSTITUANT UN CONDUIT DE SORTIE DU FLUIDE, MENAGE DANS LE CORPS 32 DE L'OUTIL 10 ET PAR LEQUEL CE FLUIDE QUITTE LE MOTEUR 14. UN OBTURATEUR 66 PEUT ETRE MIS DANS UNE POSITION D'OUVERTURE, POUR PERMETTRE AUDIT FLUIDE D'ECHAPPEMENT DE PARCOURIR LE CONDUIT, ET DE FERMETURE, DANS LAQUELLE IL BLOQUE LEDIT FLUIDE ET ARRETE LE MOTEUR. UN MOYEN 64, 72, SENSIBLE A LA DECROISSANCE DE LA VITESSE DU MOTEUR 14, AMENE LEDIT OBTURATEUR 66 A SA POSITION FERMEE. APPLICATION AUX OUTILS PNEUMATIQUES, TELS QU'UN SERRE-ECROU.
Patent FR-2443195-A1 (FR)
Title: Cutting mechanism trough for self-propelled combined harvesters - has several rows of intake chains and bladed intake spiral
IPC: A01D45/00
Filed: 1979-12-04
Abstract: The cutting mechanism is for self-propelled combine harvesters with several rows of intake chains. There is an intake spiral with blades. Limiting wall protuberances are set firmly on the side walls and on the back wall. There are further removable parts (9, 10) on the fixed attachments (3, 4) for limiting the wall elevation. The rear wall (10) which is enclosed by a frame can pivot. Side boundaries (15) are connected with the rear wall (10) and flap with it. The pivotable rear wall (6) is supported by buffers on the driver's cab.
Patent FR-2475891-A1 (FR)
Title: Artificial hip joint prosthesis - has external wing on curved portion fixed in recess in large trochanter
IPC: A61F2/30
Filed: 1979-12-06
Abstract: The artificial hip joint is for use in the case of a fracture of the neck of the femur affecting the small trochanter, and comprises a curved portion extended on one side by a straight tail fixed in the diaphysis of the femur. On the other side the curved portion ends in a spherical head fitting in the cavity of the iliac bone. It has, on its curved portion (14) a wing (19) extending towards the outside and fitting in the recess in the large trochanter (20,5). Screws are provided for fixing the large trochanter to the wing. The curved portion can be connected to the tail (15) by a shoulder (21) resting on the top end, previously cut (7a), of the diaphysis (7).
Patent FR-2447556-A1 (FR)
Title: Dispositif pour indiquer des defaillances des regulateurs des generateurs d'eclairage dans les vehicules automobiles
IPC: H02P9/04
Filed: 1980-01-24
Abstract: A.DISPOSITIF POUR INDIQUER DES DEFAILLANCES DES REGULATEURS DES GENERATEURS D'ECLAIRAGE DANS LES VEHICULES AUTOMOBILES. B.DISPOSITIF CARACTERISE EN CE QU'IL COMPORTE AU MOINS UNE DIODE LUMINESCENTE QUI, EN CAS DE DEFAILLANCE, ASSURE L'EMISSION D'UN SIGNAL OPTIQUE. C.L'INVENTION S'APPLIQUE NOTAMMENT AUX ALTERNATEURS DE VOITURES AUTOMOBILES.
Patent FR-2475064-A1 (FR)
Title: Spark discharge metal surface treatment process - has rotating electrode with brush of hard wire elements moved across treated surface
Inventor: INOUE KIYOSHI
IPC: C21D1/09
Filed: 1980-01-31
Abstract: The electrode consists of a head(3) that has a number of projecting wires of a suitable hard material, pref. a metal carbide, B carbide or B nitride, together with at least 1 of Ag, Ni, Fe, Au, Cr, Co and Mo. The wires are either of round or square section. An electric motor supported the shaft of the electrode unit and provides rotation in the range 500 to 20000 rpm. The surface being processed(8) is moved relative to the rotating electrode that is powered by a pulse generating source(9). A high processing rate is achieved and a uniform surface is obtd. Appts. is also claimed.
Patent FR-2480252-A1 (FR)
Title: Storage plate for articles in packing conveyor line - has feed conveyor and sloping plate unloading onto second conveyor
IPC: B65G47/51
Filed: 1980-04-14
Abstract: The feed conveyor belt (1) unloads articles (3) on the top part of a sloping plate (2) which has a slope of 22 degrees. The articles slide under their own weight into a plate (4) which makes an angle of 30 degrees with the horizontal. The sloping plate supplies articles onto the conveyor (5). The sides (6) of the plate make an angle of 38 degrees with the plate to prevent the articles bridging. This is also achieved with the divider (4) fitted to one end of the plate.
Patent FR-2453923-A1 (FR)
Title: Dispositif perfectionne de formation de lisieres d'etoffes
IPC: D03D47/40
Filed: 1980-04-24
Abstract: CE DISPOSITIF COMPORTE DES ELEMENTS COOPERANT DE DISTRIBUTION DU FIL, QUI EFFECTUENT DES MOUVEMENTS RELATIFS VERTICAUX LES UNS VERS LES AUTRES SUR DES DISTANCES DEFINIES EN UTILISANT LE MOUVEMENT DE MONTE-ET-BAISSE DES HARNAIS DE TISSAGE UNI SEULEMENT POUR DISTRIBUER AU MOINS UN FIL DE GAZE TY, POUR UNE COURSE DE GAZE, ALTERNATIVEMENT SUR DES COTES DIFFERENTS DE CHAQUE FIL DE LIAGE GY CONTROLE PAR UNE AIGUILLE-GUIDE 10, UNE FOIS PAR COUP, PAR CONTACT GLISSANT DU FIL DE GAZE AVEC LES BORDS INCLINES, CE DISPOSITIF PERMETTANT AINSI DE FORMER DES LISIERES DE GAZE SOLIDES, POUR DES TISSUS, TOUT EN ETANT DE CONSTRUCTION SIMPLE, LES ELEMENTS MECANIQUES ASSOCIES ETANT SOUMIS A DES MOUVEMENTS SIMPLES.
Patent FR-2456009-A1 (FR)
Title: Installation d'essuie-glace, notamment pour vehicules automobiles
Inventor: GILLE GUNTHER
IPC: B60S1/08
Filed: 1980-05-09
Abstract: L'INVENTION CONCERNE UNE INSTALLATION D'ESSUIE-GLACE, NOTAMMENT POUR VEHICULES AUTOMOBILES. CETTE INSTALLATION COMPREND UN MOTEUR10, UN INTERRUPTEUR D'ARRET EN POSITION DE REPOS17, UN COMMUTATEUR DE MARCHE-ARRET20 ET UN DISPOSITIF DE COMMANDE30. CE DERNIER COMPORTE UN RELAIS32 COMMANDE PAR UN MULTIVIBRATEUR MONOSTABLE40. UN DES DEUX CIRCUITS TEMPORISATEURS46, 45; 44, 45 COMMANDE LE RETOUR A LA CONDITION INITIALE DU MULTIVIBRATEUR. LORSQUE LE MOTEUR EST BLOQUE, C'EST LE CIRCUIT TEMPORISATEUR A PLUS GRANDE CONSTANTE DE TEMPS QUI EFFECTUE CETTE COMMANDE DE FACON A PROTEGER LE MOTEUR. L'INVENTION S'APPLIQUE A LA COMMANDE D'ESSUIE-GLACE AVEC PROTECTION DU MOTEUR.
Patent FR-2482653-A1 (FR)
Title: Flexible heat insulating screen - runs in guides which magnetically attract screen edges to form thermal seal
IPC: E06B9/24
Filed: 1980-05-19
Abstract: The insulating screen is made up of a sheet of heat insulating material sandwiched between two flexible panels. The end of the screen is pref. attached to a point and passes over a steel rod then extends up to a roller where it is secured to a cord. To raise the screen, a traction system pulls the cord and the screen over the roller to lift the rod. The screen runs in pref. slightly inclined guides which magnetically attract the edges of the screen to form a thermal seal. When closed, the bottom of the screen contacts a profile which magnetically attracts the rod to complete the seal.
Patent FR-2487190-A1 (FR)
Title: Portable calf supporting cradle - has arms joined by cross member with axially extending central trunnion engaging in chassis cross bar
IPC: A61D3/00
Filed: 1980-07-25
Abstract: The calving cradle has a pair of handles allowing it to be raised to an upright position. Its arms are joined by a cross- member at the end and have a central axial trunnion fitting in a cross-member (1) of the chassis. The handle can be joined to the arms at points between the chassis and the cradle, and can be arranged to hinge on the arms. Winches and handles can be mounted on a common spindle. A locking device prevents the cradle turning when the handles are upright, and also locks the hinging movement of the handles.
Patent FR-2488123-A1 (FR)
Title: Sphygmomanometer with cuff and conductive liq. filled hose - uses hose expansion limiters, when cuff is applied and has two hose connecting points
Inventor: FLOWERS EDWARD P
IPC: A61B5/022
Filed: 1980-08-05
Abstract: The conductive liquid is used for resistance measuring and is secured to a corresponding body part by the sphygmomanometer cuff. To the hose (2), containing the liquid, are connected measuring wires, the hose being fitted with expansion limiters (5, 6) when the cuff (1) is applied. The latter is preferably non-elastic and has two points, forming the expansion limiters, at which the hose is connected in untensioned state. The distance of these points is greater by a presett amount than the length of the hose clamped between them. Electrodes are coupled to the hose which may be folded in its middle into a loop whose ends may be secured to the limiting point (6) on the cuff. The centre of the loop may be secured to the other limiting point (5). Typically the hose is secured to the cuff inner side. The resistance measuring liquid in the hose is typically a gallium-indium alloy, electrically conductive at room temperature.
Patent FR-2489610-A1 (FR)
Title: Tantalum capacitor lead connections - has nickel lead wave solders onto preheated silver coated cathode in continuous process
Inventor: PLAINCHAULT CLAUDE
IPC: H01R43/00
Filed: 1980-08-29
Abstract: The successive operations are as follows; one conducting lead is spot welded to the other existing component lead (16). The cathode lead is nickel and the anode lead is tantalum and the nickel lead is bent round and supported on a flexible adhesive band which is driven (4) in a production chain. Next, the cathode and connecting wire (36) are preheated by infrared to between 80 and 90 deg.C. The body is then wave fluxed with a resin flux and wave soldered to the lead (36) with lead tin soldered at below 200 deg.C. The thickness of the solder (6) is continuously adjacent and the joint cleaned to remove traces of flux with trichloroethylene. The body of the capacitor (1a) is the cathode and is formed from manganese dioxide coated with graphite and that coated with silver. The dielectric is tantalum pentoxide.
Patent FR-2491126-A1 (FR)
Title: Dispositif pour manoeuvrer les volets d'une tuyere de turbomachine
Inventor: FONDACCI JEAN-LUC
IPC: F02K1/15
Filed: 1980-10-01
Abstract: L'INVENTION CONCERNE UN DISPOSITIF POUR MANOEUVRER LES VOLETS D'UNE TUYERE DE TURBOMACHINE. DE L'AIR SOUS HAUTE PRESSION P4 EST PRELEVE DANS LE COMPRESSEUR 1 DE LA TURBOMACHINE POUR ALIMENTER UN MOTEUR A AIR COMPRIME, 2; L'ARBRE 5 DE CELUI-CI ENTRAINE EN ROTATION UNE POMPE VOLUMETRIQUE A CYLINDREE CONSTANTE 4, QUI ENVOIE DU LIQUIDE HYDRAULIQUE DANS UN VERIN 8, MANOEUVRANT LE OU LES VOLETS DE LA TUYERE. L'INVENTION EST APPLICABLE A LA MANOEUVRE DE TOUS LES VOLETS MOBILES DES TUYERES DE TURBOMACHINES.
Patent FR-2492562-A1 (FR)
Inventor: RICHEL GERALD
IPC: A61B5/024
Filed: 1980-10-16
Abstract: The device has a body-internal device (1) for detecting and determining the information as soon as it appears, a body-internal device (2) for storing the information and a device (3), acting in two directions, for transmitting the information, which exhibits a programming device. It also has a clock pulse generator (9) which subdivides the data acquisition period into successive basic periods, and a device which is capable of logically combining an ordinal index of the basic period, in which the information has been determined, with each information determined and stored.
Patent FR-2471318-A1 (FR)
Title: Bag filling installation with proportioning feed - has bag edge opening device with folding elements for forming inner fold on stretched bag edges
Inventor: GERHARDS EDUARD
IPC: B65B7/06
Filed: 1980-11-27
Abstract: Between a proportioning device for the material to be filled, such as the outlet of a weighing machine and a conveyor for the filled and closed bags located below, is a filler funnel with transverse movement. It has a discharge branch, fitted with bag clamps and operating devices and with clamping sections gripping the open end of the bag both outside and inside. A device, holding the edge of the back taut, includes folding elements by which the side sections of the edge of the back can be drawn round the clamping sections (9a,9b) of the bag clamp. This forms an interior fold. A gripper member (41) holds the straightened and folded bag edge, in order to form a seam.
Patent FR-2500179-A1 (FR)
Title: Silvered image formation - using emulsion sensitive to silver halogen(s) pressurised sheet and polymer retardant
Inventor: GEHIN GUY MICHEL
IPC: G03C5/26
Filed: 1981-02-13
Abstract: The process produces a slivered image which is enveloped and stabilised. A photographic product is exposed and on a support is a coating of photosensitive emulsion, sensitive to silver halogens. A basic treatment soln. is applied to the exposure. Pressure is applied to a treatment sheet and a silver halogen developer is incorporated in the treatment solution. The sheet has a transparent support on which are applied, successively, a stabilising layer and a retarding layer for the silvered image. This contains a polymer acting until the end of the developing action.
Patent FR-2476852-A1 (FR)
Title: Capteur magnetique
Inventor: NARIMATSU AKIHISA
IPC: G01R33/09
Filed: 1981-02-20
Abstract: L'INVENTION CONCERNE UN DISPOSITIF CAPTEUR MAGNETIQUE. IL COMPREND UN ELEMENT MAGNETORESISTIF 11 A TROIS BORNES POSSEDANT UNE PARTIE 14, 15 DE TRAJETS DE COURANT EN MATERIAU FERROMAGNETIQUE, UNE SOURCE DE COURANT DE POLARISATION ALIMENTANT LADITE PARTIE, UN MATERIAU D'AIMANTATION DE POLARISATION 18 QUI APPLIQUE UN CHAMP MAGNETIQUE H A LADITE PARTIE SUIVANT UN ANGLE DE 45, ET UN MATERIAU D'AIMANTATION DE SIGNALISATION 30 QUI APPLIQUE A LADITE PARTIE UN CHAMP MAGNETIQUE H DONT LA DIRECTION VARIE EN FONCTION DU DEPLACEMENT RELATIF DE L'ELEMENT MAGNETORESISTIF. APPLICATION AUX DISPOSITIFS D'ASSERVISSEMENT ANALOGIQUES DE POSITIONNEMENT AUTOMATIQUE DE MACHINES-OUTILS.
Patent FR-2500933-A1 (FR)
Title: Catadioptric stark effect laser modulator for IFF interrogator - uses corner cube catadioptres and two sets of orthogonal plane mirrors forming rectangular section waveguide
Inventor: HUIGNARD JEAN-PIERRE
IPC: G02F1/17
Filed: 1981-02-27
Abstract: The reflecting light modulator uses the Stark effect of field dependent absorption of a gas such as deuterated ammonia at low pressure, and is used to modulate laser generated light at wavelength between the far infra red and ultra violet. Monochromatic light is reflected parallel to its angle of incidence. The modulator consists of a metal chamber (1) with an optical window (2) filled with gas at low pressure. Absorption is controlled by varying the voltage applied to electrodes (31,35) in the cell. The reflecting element of the cell is an assembly of corner cubes (5) with their faces towards the window and an array of orthogonal plane mirrors (31,35) with metallic surfaces aligned perpendicular to the plane of the corner cubes and forming rectangular waveguides within the cell and serving as electrodes. The mirrors are alternately grounded or modulated. The electrodes do not provide obscuration and the field of view can be extended without minimising the depth of the cell. The field of view is limited to about 20 degrees by corner reflectors.