baber/WOPTO huggingface dataset:
Patent FR-2462022-A1 (FR)
Title: Thyristor or triac mfr. process - includes diffusion of gold through windows in glass layer deposited over semiconductor
Inventor: BACUVIER PIERRE
IPC: H01L21/22
Filed: 1979-07-24
Abstract: The semiconductor mfr. process includes the diffusion of gold into the semiconducting material. After the normal stages of forming layers and zones in the semiconducting plate, a layer of glass is deposited with windows where the gold is to be diffused. A uniform layer of gold is then deposited on the glass and the assembly is heated to alloy the gold to the superficial layers of semiconductor. Excess gold is then removed by a chemical process. The semiconductor plate is again heated in order to diffuse the gold into the alloyed zones. The glass is subsequently etched away from the surface in the areas where electrical contacts are to be connected. The gold diffused areas may be protected by a layer of silica. The technique may be used in the production of an inverse conduction thyristor equivalent to an anti-parallel arrangement of a thyristor and a diode; it may also be used to produce a triac consiting of two thyristors in anti- parallel.
Patent FR-2433853-A1 (FR)
Title: Circuit de regulation perfectionne
IPC: H02M7/162
Filed: 1979-07-23
Abstract: L'invention concerne un circuit de régulation d'une alimentation électrique. Ce circuit se caractérise en ce que, la régulation étant effectuée par la conduction d'un transistor unijonction programmable 40, une diode 108 empêche une régulation indue de l'alimentation lors d'une panne de la tension de la source de courant alternatif. Application : alimentation de lampes à décharge dans un gaz.
Patent FR-2463435-A1 (FR)
Title: Quick hour setting system for timepiece - has guides connected between portions of epicyclic gear train and setting wheel
Inventor: BILLET ALAIN
IPC: G04B27/00
Filed: 1979-08-10
Abstract: In the timepiece with a motor driving a minute hand staff, an apicyclic gear train drives an hour hand spindle. A selectively rotatable hour setting wheel is provided. Guides are connected between portions of the epicyclic gear train and the setting wheel to enable operation of the epicyclic gear train. The guides are rotatable along with the setting wheel. Pref. the epicyclic gear train includes a gear which is moved inside a toothed annulus by an eccentric on the minute wheel staff, with the guides enabling oscillatory motions of the gear.
Patent FR-2463065-A1 (FR)
Title: Cardboard tray for refrigerated fruit or vegetables - has side decking to allow stacking and tabs to lock panels
Inventor: THOMAS GILLES ROLAND
IPC: B65D5/00
Filed: 1979-08-14
Abstract: The packing tray is made from a single piece of cardboard, and has a base (1) with integral sides (8) and end pieces (12,13) formed by bending the panels along the edges (2,3). The side strips (9) form a side deck to the box and tabs (10) are fitted with a tongue (11) slotted in a groove (7). The tabs (14) in the end panel extensions fit in the slots in the side strips. Reinforcing strips may fit in the slots (14).
Patent FR-2435083-A1 (FR)
Title: Procede et systeme pour la commande automatique de la fermeture et de l'ouverture d'une vanne de purge
IPC: F01D25/32
Filed: 1979-08-28
Abstract: Procédé accommodant des variations de température de la vapeur à des pressions élevées. Le système comprend des moyens 33, 37 pour mesurer la température réelle du fluide, des moyens 25 pour mesurer la pression réelle du fluide; des moyens 29 pour engendrer une courbe de température de saturation basée sur la pression réelle du fluide; et des moyens de comparaison 45, 49 de la courbe de température de saturation avec la courbe de température réelle; et des moyens 55, 59 pour actionner cette vanne de purge en fonction du signal de sortie de ces moyens de comparaison. Application aux centrales électriques.
Patent FR-2467078-A1 (FR)
Title: Laser beam producing printing blocks - synchronously scans and modulates for line and half tone structures using sawtooth pulse generator and comparator
IPC: H04N1/405
Filed: 1979-10-11
Abstract: A measure device for the preparation of printing blocks consists of three cylinders on a common drive shaft. The first carries the master plate which is scanned by an optoelectronic reader, the second fixes the boundaries for the line and half-tone with the of the block, and the third carries the printing plate on which a laser beam etches the raster grid or line block structure via a beam modulator. The electronic circuit includes a synchronised sawtooth pulse generator, a comparator, and a life-half toner commutator.. This system is suitable for combined line and half-tone structures. It is simplified by the absence of all photo reproductive and photochemical processes and speeds up the technological process for block making.
Patent FR-2468308-A1 (FR)
Title: Air conditioning unit for bakery proving chamber - has simple contacting humidifier downstream of air cooler
IPC: A21C13/00
Filed: 1979-10-26
Abstract: The unit comprises a vertical air duct with intake at the lower end. The top of this riser duct leads into one end of a horizontal duct which delivers conditioned air at its free end. Fans are installed at the junction between the two ducts and a refrigerating heat exchanger is fitted in the horizontal duct, downstream of the fans. The air is further conditioned by humidification. Humidification is carried out in the horizontal duct downstream of the heat exchanger. The base of the horizontal duct contains a constant level, open topped water tank. The current of air leaving the heat exchanger is deflected downwards to blow against the surface of water in the tank and hence pick up moisture. The deflectors are pref. adjustably inclinable, transverse baffle blades.
Patent FR-2467541-A1 (FR)
Title: Growing plant supporting stage - is tube screwed into base below roots, with holes for cross pieces, also for water and fertiliser
IPC: A01G9/12
Filed: 1979-10-24
Abstract: The device for supporting growing plants consists of a plate which is inserted in the bottom of the pot, with an internally threaded hole for a tube to act as a plant stake. The tube has holes through it, into which can be fitted horizontal supports. Liquid can be poured through the tube, to feed the plant, and this can be discharged sideways through perforations through the tube below the level of the soil in the pot. Similarly a hollow tube can be buried in the earth, attached to a base, for a young tree. Pellets can also be inserted through a hole in the tube. Further sections can be added.
Patent FR-2440806-A1 (FR)
Title: Machine de soudage
IPC: B23K37/02
Filed: 1979-10-31
Abstract: L'INVENTION CONCERNE UNE MACHINE DE SOUDAGE. LA MACHINE COMPREND UN DISPOSITIF D'ALIMENTATION EN FIL 12, UNE BOBINE DE FIL 15 UN GUIDE-FIL FLEXIBLE 19 RELIANT LE DISPOSITIF D'ALIMENTATION A UNE BUSE DE TORCHE 9 ET UN ENSEMBLE DE SOUDAGE MONTE SUR UNE PLATE-FORME A ROUES 1, 2, L'AXE DE LA BOBINE ET L'AXE D'UN GALET ENTRAINEUR DU DISPOSITIF D'ALIMENTATION EN FIL ETANT PLACES SUR UNE PERPENDICULAIRE A A LA PLATE-FORME PASSANT PAR SON AXE LONGITUDINAL AFIN DE PERMETTRE UN CHANGEMENT DE POSITION DE SOUDAGE, AUSSI BIEN A DROITE QU'A GAUCHE. APPLICATION AU DOMAINE DU SOUDAGE.
Patent FR-2469135-A1 (FR)
Title: Foldable rainwear garment with front and rear opening - has horizontal folding strips with lower fastening seam to form belt in folded position
IPC: A41D3/04
Filed: 1979-11-16
Abstract: The garment has horizontal fold lines (1) which are evenly spaced from each other to define foldable strips so that the total height of the garment folds down in concertina fashion. When folded, the sleeves protrude at the sides and any hood which may be provided similarly folds in the same manner. A seam (2) runs along the front or rear lower edge of the garment so that, when the garment is folded, the seam can be turned over to enclose the folds and be held closed by fasteners (5,6). The protruding folded sleeves (4) also have fasteners (8,9,10) to connect their free ends together so that the folded garment can be worn as a belt.
Patent FR-2471091-A1 (FR)
Title: Decoder for unreliable parallel channel transmission system - has separate receivers for each incoming channel and evaluates information according to unique monotonic function
Inventor: LAURENT PIERRE ANDRE
IPC: H04L1/02
Filed: 1979-11-30
Abstract: The decoder has information of M values transmitted simultaneously on each one of N channels. The circuit comprises N auxiliary decoders coupled to the channels and a circuit for evaluation for each value B of the information a function of the probability of having been transmitted using an auxillary function of the product of the terms (1-Pi)(M-1)/Pi for i=1 to N, where Pi is the probability of error in the channels during the course of coding. The value for which the auxiliary function is maximum is determined as the near probability of a correct decision on reception of the information and the mean probability of discordances (di). Estimations of the mean Pi values are made by the formula Pi(average) = These values are substituted for Pi before decoding is effected.
Patent FR-2450390-A1 (FR)
Title: Dispositif d'entrainement rotatif
IPC: F16D41/08
Filed: 1979-12-18
Abstract: L'INVENTION CONCERNE UN DISPOSITIF D'ENTRAINEMENT A CHANGEMENT DE VITESSE, FOURNISSANT UNE OU PLUSIEURS SORTIES UNI-DIRECTIONNELLES QUI SONT INDEPENDANTES DU SENS DE ROTATION DE L'ENTREE. IL COMPREND UN EMBRAYAGE UNI-DIRECTIONNEL AYANT UNE PLURALITE DE CAMES 16 PLACEES ENTRE UNE PAIRE DE BAGUES CONCENTRIQUES 12, 14 DONT UNE PARTIE AGIT EN ORGANE DE REACTION. IL COMPREND AUSSI UN ORGANE D'ENTREE 26 ET UN ROULEMENT 28 PLACE ENTRE L'ORGANE D'ENTREE ET UNE BAGUE DE L'EMBRAYAGE, CHAQUE ORGANE POUVANT TOURNER AUTOUR D'UN AXE CENTRAL. LA ROTATION DE L'ORGANE D'ENTREE PROVOQUE LA DEFORMATION DE L'UNE DES BAGUES, FOURNISSANT UN MOUVEMENT ONDULATOIRE POUR L'ENGAGEMENT ET LE DESENGAGEMENT PROGRESSIFS DE TOUTES LES CAMES. UN ORGANE DE REACTION ETANT EMPECHE DE TOURNER, L'OSCILLATION OU LA ROTATION DE L'ORGANE D'ENTREE DANS UNE DIRECTION PROVOQUE UNE ROTATION DANS UN SENS D'UN OU DE PLUSIEURS ORGANES DE SORTIE. LES VITESSES DES ORGANES DE SORTIE SONT DIFFERENTES ENTRE ELLES AINSI QUE DE L'ORGANE D'ENTREE.
Patent FR-2472925-A1 (FR)
Title: Robot de cuisine
Inventor: WILLIAMS JAMES EVERETT
IPC: B26D3/26
Filed: 1980-01-02
Abstract: L'INVENTION EST RELATIVE A UN ROBOT DE CUISINE COMPORTANT UNE BASE 10, UN BOCAL 12 ET UNE UNITE D'ENTRAINEMENT POUR ENTRAINER EN ROTATION UNE MONTURE D'OUTIL 44 SITUEE DANS LE BOCAL 12. L'UNITE D'ENTRAINEMENT COMPORTE UN MOTEUR UNIVERSEL ELECTRIQUE 110, UN ENGRENAGE ANNULAIRE 132 EN PRISE AVEC UN PIGNON 122, ET UN SUPPORT ROTATIF 128 PORTANT CET ENGRENAGE ANNULAIRE 132; CE SUPPORT ROTATIF 128 ENTRAINE LA MONTURE D'OUTIL 44 PAR L'INTERMEDIAIRE D'UN EMBRAYAGE.
Patent FR-2450787-A1 (FR)
Title: Procede de bombage a la presse de feuilles de verre et presse de bombage pour sa mise en oeuvre
IPC: C03B23/031
Filed: 1980-03-03
Abstract: L'INVENTION CONCERNE UN PROCEDE ET UN APPAREIL POUR LE BOMBAGE A LA PRESSE DE FEUILLES DE VERRE. DANS L'INTERVALLE DE TEMPS DT ENTRE LES PASSAGES SUCCESSIFS DE DEUX FEUILLES, ON REFERME LA PRESSE DE BOMBAGE IMMEDIATEMENT APRES L'EVACUATION DE LA FEUILLE MISE EN FORME ET ON LE LA ROUVRE QU'IMMEDIATEMENT AVANT L'INTRODUCTION D'UNE NOUVELLE FEUILLE A BOMBER. ON ARRIVE AINSI A REDUIRE LES DEPERDITIONS CALORIFIQUES DE LA PRESSE, CE QUI PERMET DE MAINTENIR UNE TEMPERATURE DE FEUILLE SUFFISANTE POUR LE TRAITEMENT DE TREMPE SUBSEQUENT. LE PROCEDE CONVIENT POUR FORMER DES FEUILLES A SIMPLE OU A DOUBLE COURBURE.
Patent FR-2469210-A1 (FR)
Title: Dispositif a broyage humide de marchandise, en particulier de malt ou d'orge
Inventor: REDL SIMON
IPC: B02C11/04
Filed: 1980-03-26
Abstract: LE DISPOSITIF SELON L'INVENTION COMPORTE UN RESERVOIR POUR LA MARCHANDISE AVEC UNE ECLUSE A ROUE CELLULAIRE FERMANT LE RESERVOIR A SON BOUT INFERIEUR, UN CONCASSEUR ET DES DISPOSITIFS D'ALIMENTATION ET D'EVACUATION DE L'EAU DESTINEE A RAMOLLIR LA MARCHANDISE A BROYER. POUR RAMOLLIR LA MARCHANDISE A BROYER PENDANT UNE DUREE EXACTEMENT DETERMINEE ET REGLABLE DANS DE LARGES LIMITES, ON PREVOIT AU-DESSUS DE L'ECLUSE A ROUE CELLULAIRE 5 AU MOINS UN DISPOSITIF D'ALIMENTATION EN EAU DE TREMPAGE 17 ET 32 ET, AU-DESSOUS DE L'ECLUSE 5, AU MOINS UN DISPOSITIF 20 ET 26 D'EVACUATION D'EAU DE TREMPAGE COMPORTANT UN CRIBLE STATIONNAIRE 20 MONTE DANS LA PARTIE INFERIEURE DE L'ECLUSE, UNE ZONE DE TREMPAGE ULTERIEUR 6 ETANT DISPOSEE ENTRE CETTE ECLUSE A ROUE CELLULAIRE 5 ET LE CONCASSEUR 7.
Patent FR-2480556-A1 (FR)
Title: Adjustable maize-harvesting machine - has two cutting tools with radial blades driven by chain and gears from shaft
Inventor: SUNDERMANN HORST
IPC: A01D43/08
Filed: 1980-04-21
Abstract: The maize-harvesting machine has a gathering mechanism with horizontal straw choppers driven by a main transverse shaft to pulverise the stems. The chopper blades slope slightly downwards in the travel direction. Mounted on the main shaft (1) is a sprocket (4) driving, via a chain (5), a further sprocket (6) on a layshaft. The latter in turn drives via gears (11,12) two cutting tools with radial blades (8,9). The gears can be accommodated in a gearbox (15) and are adjustable on the shaft (1). The design allows simple adjustment to suit varying distances between the rows of plants.
Patent FR-2454813-A1 (FR)
Title: Dispositif d'inhalation rapide de produits pharmaceutiques en poudre par l'homme
Inventor: CAVAZZA CLAUDIO
IPC: A61M15/00
Filed: 1980-04-25
Abstract: L'INVENTION CONCERNE UN DISPOSITIF D'INHALATION D'UN PRODUIT PHARMACEUTIQUE EN POUDRE PLACE DANS UNE CAPSULE QUI PEUT ETRE PERCEE. LE DISPOSITIF COMPORTE DEUX ORGANES CYLINDRIQUES 10, 11 DONT L'UN AU MOINS A UN DISPOSITIF CREUX 12 DE PERCEMENT, LES ORGANES POUVANT COULISSER TELESCOPIQUEMENT L'UN PAR RAPPORT A L'AUTRE ENTRE UNE PREMIERE POSITION DANS LAQUELLE LA CAPSULE EST INTACTE ET UNE SECONDE POSITION DANS LAQUELLE LA CAPSULE EST PERCEE SI BIEN QUE, LORSQU'UN UTILISATEUR ASPIRE DE L'AIR DANS LE DISPOSITIF, LE PRODUIT PHARMACEUTIQUE EST MIS EN SUSPENSION DANS L'AIR ET EST INHALE. APPLICATION AU TRAITEMENT DES PATIENTS SOUFFRANT D'ASTHME.
Patent FR-2456591-A1 (FR)
Title: Machine a meuler pour la finition de surfaces plates telles que des dalles de planchers en ciment, beton ou materiaux durcis analogues
Inventor: CARLSTROM PER
IPC: E01C23/088
Filed: 1980-05-14
Abstract: LA MACHINE COMPREND UN CHASSIS 1 EQUIPE DE ROUES PORTANT UN MOTEUR DESTINE A ENTRAINER LES MEULES MONTEES SUR DES ARBRES VERTICAUX; LE CHASSIS 1 COMPORTE AU MOINS TROIS ROUES 4, 7 REPOSANT SUR LA SURFACE SOUS-JACENTE PENDANT LA PROGRESSION DU MEULAGE, AU MOINS L'UNE DES ROUES 7 ETANT ARTICULEE SUR UN ARBRE VERTICAL DE DIRECTION 8; LES MEULES 13 SONT SUPPORTEES PAR DES TETES DE MEULAGE 12 SUR LES ARBRES VERTICAUX 11 QUI SONT ARTICULES DANS DES BOITES A PALIERS 14 POSSEDANT LA LATITUDE D'UN DEPLACEMENT VERTICAL LIBRE PAR RAPPORT AU CHASSIS.
Patent FR-2483752-A1 (FR)
Title: Combination sports garment - comprising a hood and jacket covering the thighs, pelvic region, chest, arms and skull
IPC: A41D13/02
Filed: 1980-06-04
Abstract: A combination sports garment comprises a hooded jacket and covers the thighs, the pelvic region, the chest, the arms and surrounds the head, but not the face. It is cut to form an envelope from the top of the head to the edge of the shoulder, and has oblique lines which cut draughts to the neck of the wearer. The garment allows for the inclusion of a crash helmet either under or over the hood. The garment is partic. intended for competition cyclists.
Patent FR-2484087-A1 (FR)
Title: Weighing and grading fowls hanging from shackles - of moving overhead conveyor using balance arms adapted to catch and lift shackles
IPC: A22C21/00
Filed: 1980-06-09
Abstract: Weighing appts. for fowl hanging from shackles of a continuously moving overhead conveyor includes balance arms extending radially outwardly from a central shaft. The outer end of each arm is adapted to grip and lift a shackle so that it is no longer supported by the conveyor. The inner end of each arm cooperates with a load cell located in the axis of the central shaft. The shape of the pick-up member may be adapted to the shape of the shackle and so can be used with almost any type of shackle. since the pick-up member moves along with the conveyor no special rollers are necessary and all relative movement between the shackle and pick-up member which would cause friction and dragging is eliminated.
Patent FR-2488410-A1 (FR)
Title: Detector for cable splice in cable transporter - has magneto-inductive device detecting current chance in coil due to magnetic strand in splice
IPC: B61B12/06
Filed: 1980-08-07
Abstract: The process is used to detect the passage of the splice in a cable used for cable transporter with detachable clamps, e.g. cable car. The splice zone has a non-magnetic cable core which is replaced by a metallic, and thus ferromagnetic, strand. The process consequently detects the passage of the ferromagnetic strand in the splice by using a magneto-inductive control. The variation of the current induced in a coil engaged on the moving cable is detected and a magnetic field is created in the centre of the coil, with the cable as core. The current variation results from the passage of the splice in the coil. This detection is used to impede the engagement of a clamp in the splice zone.
Patent FR-2488972-A1 (FR)
Title: Procede d'intervention sur une conduite transportant un fluide notamment sur une conduite immergee
Inventor: QUIN RENE
IPC: F16L55/124
Filed: 1980-08-22
Abstract: L'INVENTION CONCERNE UN PROCEDE D'INTERVENTION SUR UNE CONDUITE DE FLUIDE. CE PROCEDE SE CARACTERISE EN CE QU'ON DEPLACE, AU-DELA DU TRONCON A REMPLACER 12, DES OBTURATEURS 8, 9 INTRODUITS A TRAVERS DES PIECES DE RACCORD 6, 7 INSTALLEES SUR CE TRONCON, ET EN CE QU'ON COUPE CE TRONCON ENTRE OBTURATEUR ET PIECE DE RACCORD. CE PROCEDE S'APPLIQUE A DES CONDUITES IMMERGEES.
Patent FR-2492242-A1 (FR)
Title: Lock for holding extending table in folded position - has plates fixed to slides and pulled together by threaded rod
Inventor: RICHARDT GEORGES JACQUES GUY
IPC: A47B1/10
Filed: 1980-09-22
Abstract: The lock is for holding extending tables with leaves in the folded position. It has two plates (4,7) fixed on the extremity of each of two lateral slides (1,2), which are bent and have one part inclined to the general direction of the slides. A threaded rod (9) fits through the inclined part of each plate. It is screwed into a threaded hole in the first plate (4) and passes through a slot in the edge of the other plate (7). A nut (11) fixed on its end can press on the second plate to pull them together.
Patent FR-2492355-A1 (FR)
Title: Stairway load lifting gear - has side wall fitted with ramp of U=section with internal motor driven rollers supporting frame to lift load
IPC: B66B9/08
Filed: 1980-10-17
Abstract: The load lifter has a frame which can be fixed to a stairway (5) side wall. It is a flat or ribbed plate (1) ending in a U section ramp (9) with a base parallel to the wall and open towards it. A moving part runs in this on rollers (20). A cam is guided in the ramp and pivots on an axis perpendicular to the ramp base. If the rope breaks this tilts under spring action and locks the equipment. A motor (25) drives the rope and there is a return pulley (28) inside the ramp and parallel to it.
Patent FR-2468150-A1 (FR)
Title: Systeme automatique de commande de la polarisation de l'electrode de developpement et du reperage du papier de tirage dans un copieur electrophotographique
Inventor: CORMIER RAYMOND GERARD
IPC: B65H1/12
Filed: 1980-10-21
Abstract: L'invention concerne un système automatique de commande de la polarisation de l'électrode de développement et du repérage du papier de tirage dans un copieur électrophotographique. Ledit système comporte un photodétecteur 29 qui intercepte une partie de la lumière non focalisée réfléchie vers la surface photoconductrice 15. Un circuit engendre une tension de polarisation de l'électrode de développement 39 qui varie en fonction de l'intensité lumineuse atteignant le photodétecteur 29 après que celui-ci a reçu une impulsion lumineuse réfléchie par une bande hautement réfléchissante placée en amont du document à copier. Ce retard fait en sorte que la lumière qui détermine la tension de polarisation soit réfléchie par le corps principal du document. Application aux copieurs électrophotographiques.
Patent FR-2493574-A1 (FR)
Title: Current controller for push=pull electrolytic display cell - uses differential amplifier with input connected to electrolytic cell electrode to drive MOSFET push=pull driver to darken and clear cell
Inventor: PRUNIER JACQUES
IPC: G09G3/38
Filed: 1980-10-31
Abstract: The circuit provides the reversible current flow required for a silver iodide electrolytic display cell by use of a push-pull output stage made up (in integrated circuit form) from MOSFET transistors. Voltage fluctuations over the electrolytic cell, arising from the voltage drop due to the channel resistance of the MOSFET transistors, are compensated by a differential amplifier driving the push pull output transistors. One side of the differential amplifier (18) is connected to the centre point of the push-pull output pair (30,32) and thus to one electrode of the electrolytic display cell (10). The other side of the differential amplifier is switched (26,28) to one of two potentials, activating one or other of the output transistors and causing current to flow in the cell in one direction or the other and thus to darken or clear the cell. Variation of the cell voltage causes compensating variation in the differential amplifier output, thus tending to maintain constant current in the cell.
Patent FR-2496634-A1 (FR)
Title: Electronic water treatment unit for pipe scale prevention - has built in filter and solid state flow detector switch
IPC: C02F1/00
Filed: 1980-12-18
Abstract: The unit uses electric impulses from an immersed electrode to prevent calcite, aragonite from forming scale deposits. The unit comprises a vertical, cylindrical treatment chamber removably fitted beneath a cover assembly which has inlet and outlet connections for water within the chamber incoming water surrounds a metal sleeve anode with perforations leading to the exterior of a hollow, cylindrical, filter element. The passage through the element contains an open-ended, tubular metal cathode leading into the outlet connection. The electric impulse generator is switched on only when water flow through the unit is signalled by a static detecting transducer. The detector can sense liq. flow, or dynamic pressure or pressure differential. The transducer sensing element is pref. located in a turbulence chamber in the outlet passage. The unit is a monobloc combination treatment chamber, filter and flow-detector switch. This combination is installed complete by coupling up inlet and outlet connections. The solid state flow switch is much more reliable than the usual float switch.
Patent FR-2472698-A1 (FR)
Title: Dispositif de rappel a ressort comprime et son procede de realisation
Inventor: CADY PERCY LUTHER
IPC: F16F1/12
Filed: 1980-12-24
Abstract: L'INVENTION CONCERNE DES DISPOSITIFS A RESSORT SUBISSANT UNE CHARGE PREALABLE. ELLE SE RAPPORTE A UN DISPOSITIF A RESSORT DESTINE A UNE POINCONNEUSE ET COMPRENANT DEUX MOITIES DE BOITIER 20, 21 CONTENANT UN RESSORT 18. LA MOITIE INTERNE 21 A UNE PARTIE TRONCONIQUE 35 S'EVASANT VERS L'EXTERIEUR ET LA PARTIE EXTERNE 20 A UNE PARTIE TRONCONIQUE 40 SE RETRECISSANT VERS L'INTERIEUR, LES DEUX PARTIES TRONCONIQUES, LORSQU'ELLES COOPERENT, LIMITANT LA PLUS GRANDE LONGUEUR DU BOITIER. DES PROLONGEMENTS CYLINDRIQUES 37 ET 41 DES DEUX BOITIERS GLISSENT CONTRE LA PAROI PERIPHERIQUE DE L'AUTRE MOITIE DE BOITIER EN FORMANT UN JOINT CIRCONFERENTIEL. L'ENSEMBLE EST DESTINE A RAPPELER UN POINCON 13. APPLICATION AU RAPPEL DES POINCONS ET DES EXTRACTEURS DES POINCONNEUSES.