baber/WOPTO huggingface dataset:
Patent FR-2454821-A1 (FR)
Title: Frame converting bicycle to exercise machine - comprises support for conventional bicycle with braking wheel acting on lifted rear tyre
IPC: A63B69/16
Filed: 1979-04-27
Abstract: The exercising frame is made of tubular steel and includes a horizontal base to which vertical supports are welded. These supports carry the rear forks of a conventional bicycle. Arms (15) extending from these two uprights carry a small wheel which presses against the edge of the bicycle tyre. The small wheel provides the necessary braking force opposing the rotation of the bicycle wheel. The relative positions of the fork supports and the braking wheel are controlled by a lever (14) extending in the opposite direction to the brake wheel support arms. This levers position is adjusted by a hand wheel (25) attached to a vertical threaded shaft (24). Clamps are provided to grip the bicycle frame holding it securely to the chassis of the exercising frame. Sections of the frame extend at right angles to the main frame (1) to provide stability. A dynamo (32) attached to the brake wheel may be used to provide an output indicating the speed of pedalling.
Patent FR-2456039-A1 (FR)
Title: Bottle containing carton made from integral blank - has arcuate slots in lid and sides to locate bottle tops and hand-holes for carrying
IPC: B65D71/00
Filed: 1979-05-07
Abstract: The carton is made from a single sheet of material and has a base integral with two ends with hand holes (1). The lid (2) also has integral end pieces with matching handholes. The sides (4) are integral with the base and have end tabs which reinforce the end pieces. The lid(2) is integral with one of the side pieces (4) through the sloping distance piece (3) which is also repeated on the opposite side. The distance piece has a number of slots (16) to hold the bottle tops. The perforated panel (5) is marked on the lid and side.
Patent FR-2426355-A1 (FR)
Title: Dispositif de demarrage pour moteurs asynchrones monophases
IPC: H02P1/44
Filed: 1979-05-15
Abstract: Dispositif comprenant une résistance à coefficient de température positif et un carter présentant un premier et un deuxième contacts pour le branchement des deux fils de ligne, un troisième contact pour la connexion du pôle commun des enroulements principal et auxiliaire, un quatrième contact pour la connexion de l'autre pôle de l'enroulement principal et un cinquième contact pour la connexion de l'autre pôle de l'enroulement auxiliaire. Il est prévu un sixième contact K6 relié au quatrième contact K4, un septième contact K7 relié au cinquième contact K5, un huitième contact K8 et un neuvième contact K9 relié à ce dernier. Application aux moteurs asynchrones, notamment, pour des compresseurs de fluides frigorigènes.
Patent FR-2457445-A1 (FR)
Title: Roof ventilator for automatic smoke ventilation - has endless cable and counterweight to effect closure in event of fire
IPC: A62C2/24
Filed: 1979-05-25
Abstract: The automatic smoke ventilator is arranged to slide into the open position. A cable is connected to the gusset of the ventilator and passes over a series of pulleys and is finally attached to the gusset to form an endless cable. A pulley is carried on a lever which is hinged to the wall of the building. A counterweight is attached to the cable so that when the ventilator is in the closed position the counterweight is at its highest level. The ventilator remains closed due to the friction imposed on the system by the lever acting in the direction of the arrow. The ventilator may be opened manually by lifting the lever and allowing the counterweight to descend. In the event of a fire the cable expands and the coefficient of friction is reduced allowing the counterweight to descend and opening the ventilator.
Patent FR-2458253-A1 (FR)
Title: Seat transformable into reclining chair - consisting of two U-shaped plates articulated by axle and forming seat and legs
IPC: A47C1/028
Filed: 1979-06-05
Abstract: The seat can be adjusted to form a reclining chair and has two U-shaped plates (1,1a) which are articulated to each other by an axle (5). The plates have a median plane (2,2a) and two lateral planes (3,3a,4,4a), perpendicular to the median plane. In the seat position the median planes are in contact while two lateral planes (3,3a) form the seat and the other two (4,4a) form the legs. They are held together at the bottom by a pin (7). In the unfolded position, the median planes form the seat and back of the seat, while the lateral planes form the legs.
Patent FR-2428669-A1 (FR)
Title: Procede de traitement du cambouis provenant d'huiles usees de laminoirs a froid pour sa preparation a la combustion et combustible ainsi produit
IPC: C10M175/04
Filed: 1979-06-11
Abstract: Procédé de traitement du cambouis provenant d'huiles usées de laminage froid. Le procédé consiste à mélanger énergiquement le cambouis avec de l'huile résiduaire et/ou du mazout, le rapport composant liquide organique à huile résiduaire et/ou mazout étant au plus 1:2, et à mélanger après décantation de ce mélange la phase contenant l'huile et le composant liquide organique avec du mazout. Récupération du composant liquide organique du cambouis produit dans la séparation de l'eau à partir des huiles usées du laminage à froid, pour son utilisation pour la combustion.
Patent FR-2432455-A1 (FR)
Title: Distributeur pour cartouches de lames de rasoir reunies
IPC: A45D27/24
Filed: 1979-07-16
Abstract: Le distributeur comporte une rangée de compartiments destinés à recevoir, de manière amovible, des cartouches de lames de rasoir. Les extrémités opposées des compartiments sont formées respectivement d'une paroi de séparation et de moyens de retenue fléchissables et << indépendants >> de la paroi de séparation du compartiment suivant. Il s'ensuit une réduction des effets cumulés des tolérances de dimensions des cartouches et, également, une réduction de la force demandée pour introduire les cartouches dans le distributeur.
Patent FR-2435375-A1 (FR)
Title: Pare-chocs pour vehicules, notamment pour automobiles
IPC: B60R19/44
Filed: 1979-09-05
Abstract: Pare-chocs pour véhicules. Il comporte un support rigide maintenu sur des éléments absorbant de l'énergie et un panneau élastique qui le recouvre, fixé à la carrosserie. En cas d'impact oblique A, le choc est appliqué au support par l'intermédiaire du panneau. En cas d'impact perpendiculaire B, il est appliqué par l'intermédiaire d'une saillie antichoc il reliée au support Applications notamment aux voitures particulières.
Patent FR-2466215-A1 (FR)
Title: Combination ruck sack and hammock - has fabric joined by slide clasp fasteners and tubes used as frame for both
IPC: A45F4/08
Filed: 1979-10-01
Abstract: The rucksack can also be used as a hammock by using a fabric which is hemmed at each end to hold two tubes. To form a rucksack, the fabric is folded once and its extremities are joined by fastenings with loops and hooks. A tube is then made by joining the two parts of a slide clasp fastener (3). The flaps in the top and base are closed by slide clasp fasteners (4&7,5&6). These flaps form lateral pockets on the hammock. The rucksack frame is the tubes of the hammock with cross bars and a strap.
Patent FR-2438364-A1 (FR)
Title: Device increasing total power delivered by three=phase generator - has three=phase load resistor whose junction point is connected to neutral point of winding
IPC: H02M7/12
Filed: 1979-10-05
Abstract: the generator is for mobile units, motor vehicles etc, and can specifically be used for heating a rear window or in the heating of an air conditioning unit. It has a star connected stator winding, and a rotating excitation winding generating the alternating magnetic field. Diodes rectifying the deliverable a.c. current are allocated to the stator winding. A three-phase load resistor (14) is connected to the stator winding (1), and the junction point (16) of the resistors is connected to the neutral point (2) of the stator winding (1). This arrangement allows for a higher power output from the stator/windings, and also decreases the generators iron-losses, due to the utilisation of the phase harmonics.
Patent FR-2467106-A1 (FR)
Title: Caisses d'engins, notamment de camions, a fond mobile
Inventor: THEVENON MAURICE
IPC: B60P1/38
Filed: 1979-10-08
Abstract: La présente invention concerne une caisse à fond mobile, caractérisée en ce qu'elle est pourvue d'une bande transporteuse souple s'appuyant sur le fond de la caisse et qui, grâce à un déplacement longitudinal par rapport à ce fond, permet un déplacement, par rapport à la caisse, du matériau qui repose sur ladite bande. (CF DESSIN DANS BOPI)
Patent FR-2440367-A1 (FR)
Title: Azolylacetals, leur preparation et leur utilisation en tant qu'agents microbicides
IPC: C07D521/00
Filed: 1979-10-24
Abstract: AZOLYLACETALS, LEUR PREPARATION ET LEURS UTILISATIONS. CES COMPOSES REPONDENT A LA FORMULE: (CF DESSIN DANS BOPI) DANS LAQUELLE R REPRESENTE UN GROUPE TERT.-BUTYLE OU UN GROUPE PHENYLE EVENTUELLEMENT MONO- OU DI-SUBSTITUE PAR DES HALOGENES; R REPRESENTE UN GROUPE PHENYLE OU DIPHENYLE EVENTUELLEMENT SUBSTITUE PAR 1 A 3ATOMES D'HALOGENES, DES GROUPES ALKYLES EN C OU C, METHOXY, CYANO, NITRO ETOU PHENOXY; A REPRESENTE -CH-
Patent FR-2469720-A1 (FR)
Title: Measurement of transfer function of rocks and materials - by acoustic method using tool of small dia. in drillings with max. efficiency of treatment of information
IPC: G01V1/46
Filed: 1979-11-08
Abstract: Appts for measuring the transfer function of rocks and materials by acoustic methods incorporates a bottom tool and a surface measuring appts. The bottom tool can be connected to a carrying cable with four conductors. Its dia is less than 55mm. The measurements can be made in holes empty of fluids by means of a system of removable sleeves filled and emptied as required. The space between emitters and receptors allows the use of different types of waves because of the signal/noise ratio. The surface measuring appts allows automatic measuring from two signals received simultaneously of an interval of time between any part of these signals. The measurement of the transfer function of rocks and materials gives information of value in the mining, petroleum, geotechnical and geophysical fields. The system allows the use of tools in drillings of smaller dia than existing one, allows more efficient treatment of the acoustic information and ensures a better acoustic connection with the material being studied.
Patent FR-2469504-A1 (FR)
Title: Pre-fabricated under water revetment - is installed by laying rows of adjacent slabs on sea bed from movable platform
Inventor: PRANDI ERIO
IPC: E02B3/12
Filed: 1979-11-12
Abstract: The underwater revetment is installed using a purpose-built platform. The revetment is assembled out of the water and consists of a row of prefabricated slabs. This row is laid on the water-bed gradually, as the revetment is assembled, going from the shallower water towards the deeper water. The revetment is completed by positioning a second row of slabs alongside the preceding one and so on. The platform is carried on a rolling chassis, pulled by winches, which includes a ramp inclined towards the water's edge.
Patent FR-2469619-A1 (FR)
Title: Ship propulsion double-reduction and reversing-gearing - has epicyclic reduction gear linking main wheel and shaft, underneath clutch unit
Inventor: NAGASAKI MICHISUKE
IPC: B63H23/08
Filed: 1979-11-14
Abstract: The reduction- and reversing-gear for ship propulsion has in- and output shafts conventionally supported respectively at the top and bottom of a clutch casing. The ahead-train pinion, loose on the input shaft, is driven via a multi-plate clutch. This also drives an astern train, parallel with the ahead. The main wheel is loose on the output shaft. Connecting the two is an epicyclic reduction gear (36) underneath the clutch assembly (20). This comprises a pinion (37) integral and coaxial with the main wheel (35), a sleeve (38) bolted to the clutch casing and internally-toothed facing the pinion and planet wheels (42) on spindles (41) mounted in a flange (40) on the output shaft (19).
Patent FR-2442368-A1 (FR)
Title: Organe de fixation inviolable destine a empecher la spoliation du contenu d'un recipient
Inventor: PALMER JOHN PATRICK
IPC: F16B19/10
Filed: 1979-11-20
Abstract: L'invention concerne un organe de fixation. Cet organe comprend un élément extérieur présentant une extrémité avant constituée de deux branches 230 qui convergent vers une pointe ou un embout 240, une tige constituée de deux bras 220 et une tête 210 qui présente un trou 211. L'organe de fixation comprend également un élément intérieur 100 qui comprend une tige 101 passant dans le trou 211 et dont l'extrémité avant 130 est reliée par des lamelles flexibles 300 à l'élément extérieur. Lorsque cet organe est enfoncé dans deux trous alignés présentés par des panneaux assemblés, il se bloque et il ne peut être retire sans être détruit. Domaine d'application : plombage de colis, de conteneurs de marchandises, etc.
Patent FR-2470256-A1 (FR)
Title: System for cold starting of carburetted petrol engines - provides supplementary injection of atomised petrol-air mixture into inlet manifold when choke and starter motor are activated
Inventor: VOLPE MARIO
IPC: F02M1/04
Filed: 1979-11-22
Abstract: Cold starting of a carburetted petrol engine is improved by injecting a supplementary fuel/air mixture into the inlet manifold close to the inlet port. Petrol and compressed air are admitted to distribution manifolds by electrically operated solenoids which operate when contacts in the choke control and starter relay are closed. The petrol and air mix when feed pipes from the distribution manifolds join and the pressure from the compressed air source causes atomisation of the mixture as it is forced through a jet into the inlet manifold. The improved atomisation results in better cold starting.
Patent FR-2445117-A1 (FR)
Title: Appareil pour former un intervalle degarni de ses elements de fixation sur une bande continue de fermeture a glissiere
IPC: A44B19/58
Filed: 1979-12-26
Abstract: Cet appareil 10 comprend un dispositif Il de compression des branches des éléments de fixation et un dispositif 12 de pincement et de déplacement du ruban. Le dispositif 12 est placé le long du dispositif il mais à une certaine distance de ce dernier. Pendant que les branches des éléments de fixation sont comprimées par le dispositif 11, le dispositif 12 pinçant le ruban support est guidé par un levier de guidage 86 qui lui fait parcourir un trajet en arc de cercle; de ce fait, une légère traction latérale est exercée sur la bande afin de détacher les éléments de fixation du ruban support. Applications notamment aux bandes continues des fermetures à glissière.
Patent FR-2474147-A1 (FR)
Title: Levelling device for installing fireplace arch - is sloping supporting rod anchored at top and threaded at bottom for levelling nut
Inventor: BRISACH RENE
IPC: E04F19/00
Filed: 1980-01-20
Abstract: The method of installing the arched section (1) at the top of a fireplace is used where the section is L shaped and difficult to align horizontally. This section consists of refractory bricks (2) with a concrete backing layer (3). The two ends are connected to vertical supports (15,16) by angle shaped adaptor plates (14). At the corner, the section has a vertical hole (4) through it for a supporting rod (5). This has a hooked end (6) embedded at a higher point, and slopes downwards to a vertical leg (7) which fits into the holes. The bottom of this leg carries a screw thread, and a nut (9) can be screwed to it, to lock the rod to the section, and adjust the height at the corner until it is level.
Patent FR-2450891-A1 (FR)
Title: Fil gonfle forme de filaments continus et procede pour sa fabrication
IPC: D02J13/00
Filed: 1980-03-07
Abstract: L'INVENTION SE RAPPORTE A L'INDUSTRIE TEXTILE. ELLE CONCERNE NOTAMMENT UN FIL CONTINU GONFLE DU TYPE A AME ET EFFET CARACTERISE EN CE QUE LES FILS D'AME A FILAMENTS CONTINUS FORMENT DE 65 A 93 DU POIDS TOTAL DES FILAMENTS, LE RESTE DU TOTAL DES FILAMENTS ETANT FORME DE FILS D'EFFET A FILAMENTS CONTINUS AYANT UN TITRE EN DENIERS PAR FILAMENT ALLANT JUSQU'A 5,0 QUI SONT INSERES ENTRE LES FILAMENTS DU FIL D'AME ET FONT SAILLIE DE LA SURFACE DU FIL D'AME DANS UN MELANGE DE BOUCLES CRUNODALES ET DE BOUCLES EN FORME D'ARC, LA MAJORITE DES BOUCLES DES FILAMENTS DES FILS D'EFFET RESTANT SEPAREES DE LA SURFACE DU FIL D'AME SUR UNE DISTANCE INFERIEURE A 4,0MM LE LONG DU FIL D'AME. UTILISATION POUR LE RENFORCEMENT DE MANCHES D'INCENDIE ET DE COURROIES EN V ET POUR LA FABRICATION DE SANGLES, DE SACS A DOS, ETC.
Patent FR-2452816-A1 (FR)
Title: Ensemble machine a reluctance
IPC: H02P8/14
Filed: 1980-03-14
Abstract: ENSEMBLE MACHINE A RELUCTANCE, COMPRENANT UN ROTOR AVEC DES POLES ROTORIQUES SANS ENROULEMENT ET UN STATOR AVEC UN NOMBRE PAIR DE GROUPES DE POLES STATORIQUES SEMBLABLES ENTRE EUX, REPARTIS UNIFORMEMENT SUR LA CIRCONFERENCE INTERNE DE L'UNITE STATORIQUE. LES POLES STATORIQUES QUI APPARTIENNENT AU MEME GROUPE ONT LA MEME POLARITE ET AUSSI LA MEME PREAIMANTATION. LA POLARITE EST DETERMINEE PAR LE FAIT QUE LES BOBINES DE TRAVAIL SONT REPARTIES EN AU MOINS DEUX ENROULEMENTS DE TRAVAIL MUNIS CHACUN D'UN DISPOSITIF REDRESSEUR. CHAQUE BOBINE DE TRAVAIL A1, A2, A3,... N'ENTOURE QU'UN POLE STATORIQUE. ENTRE DEUX POLES STATORIQUES DONT LES BOBINES DE TRAVAIL FONT PARTIE D'UN SEUL ET MEME ENROULEMENT DE TRAVAIL SE TROUVE AU MOINS UN POLE STATORIQUE PORTANT UNE BOBINE DE TRAVAIL QUI FAIT PARTIE D'UN QUELCONQUE AUTRE ENROULEMENT DE TRAVAIL.
Patent FR-2486303-A1 (FR)
Title: Relais electromagnetique a armature pivotante a aimant permanent
Inventor: KOEHER GERARD
IPC: H01H51/22
Filed: 1980-03-21
Abstract: RELAIS ELECTROMAGNETIQUES BISTABLE COMPRENANT UNE CULASSE 1 EN U MUNIE DE BOBINES 5, DONT LES BRANCHES 4 VIENNENT S'INSERER DANS LES PIECES POLAIRES D'UNE ARMATURE 6 EN H COMPRENANT UN AIMANT PERMANENT 7 ET PIVOTANT AUTOUR DES PIVOTS 12A, 12B. UNE LAME FLEXIBLE 14 EST FIXEE EN 17 SUR L'ARMATURE 6 ET PORTE DEUX CONTACTS MOBILES 15A, 15B QUI VIENNENT S'APPLIQUER SUR DEUX CONTACTS FIXES 16A, 16B POUR LES RELIER ELECTRIQUEMENT ENTRE EUX. LA MAJEURE PARTIE DE LA LAME 14 NE JOUE AUCUN ROLE CONDUCTEUR. APPLICATION AUX RELAIS A OUVERTURE PIVOTANTE, NOTAMMENT AUX RELAIS D'ACCORD POUR ANTENNES DE RADIO-EMETTEURS PORTATIFS.
Patent FR-2479428-A1 (FR)
Title: Gas fired boiler with pressurised air supply - condenses steam formed in products of combustion and has combustion air supplied to space between inner and outer housings
Inventor: CHARRIER ELIE
IPC: F22B21/06
Filed: 1980-03-27
Abstract: The gas-fired boiler has an outer housing (1) surrounding an inner housing (2). The air for combustion is supplied by a fan (14) which delivers it at pressure into the space (15) between the inner and outer housings. The water being heated flows through vertical tubes (3) arranged in the form of a cylinder around a central burner (7). The air flows into the upper end of the burner where it mixes with the gas supplied through the pipe (9). The burnt gas emerges through radial holes (12) in the burner and flows over the fins (34) of the water tubes and then downwards to the base (17) before flowing upwards over the inlet water pipe (5). The efficiency of the boiler is increased by condensing the steam formed from the combustion of the hydrogen contained in the gas. This condensate flows out through the pipe (31).
Patent FR-2480907-A1 (FR)
Title: Gas burner with compressed air supply - has adjustable atmospheric air inlet in front of burner nozzle
Inventor: CRUSSOL HENRI
IPC: F23D14/64
Filed: 1980-04-17
Abstract: The burner has a nozzle (10) with an atmospheric air intake opening (F3) at one end. Gas is supplied at the gas connection (26) and is supplied to the burner through the central pipe (25). Compressed air is provided from the side entry (29) and circulates outside the central gas pipe to the burner mouth (31). The atmospheric air entry is controlled by moving the burner assembly along in the frame (15), by turning the nut (22) with its lock nut (23).
Patent FR-2456117-A1 (FR)
Title: Procede de preparation d'une resine convenant pour preparer une composition diluable a l'eau
Inventor: LATTIME RICHARD R
IPC: C08F20/00
Filed: 1980-05-06
Abstract: LA PRESENTE INVENTION CONCERNE UN PROCEDE DE PREPARATION D'UNE RESINE PAR POLYMERISATION RADICALAIRE EN EMULSION, D'UN MELANGE DE MONOMERES CONSTITUE DE A UN MONOMERE BIFONCTIONNEL HYDROSOLUBLE, B UN MONOMERE A CARACTERE HYDROPHOBE FORMANT UN SEGMENT DUR, C EVENTUELLEMENT, UN MONOMERE A CARACTERE HYDROPHOBE FORMANT UN SEGMENT MOU, ET D UN ACIDE ORGANIQUE A CARACTERE HYDROPHILE. L'AVANTAGE PARTICULIER DE L'INVENTION RESIDE DANS L'UTILISATION DU MONOMERE BIFONCTIONNEL HYDROSOLUBLE AYANT POUR BUT D'ELIMINER ESSENTIELLEMENT LA NECESSITE D'AUTRES AGENTS EMULSIONNANTS. LA RESINE AINSI PREPAREE CONVIENT POUR PREPARER UNE COMPOSITION DILUABLE A L'EAU.
Patent FR-2468761-A1 (FR)
Title: Dispositif de demarrage d'un moteur a combustion interne
Inventor: ASAO TOMOHIRO
IPC: F01L13/08
Filed: 1980-05-20
Abstract: Dispositif de démarrage pour moteur à combustion interne, comportant un démarreur à câble et un dispositif de décompression. La soupape d'échappement 4 peut être ouverte volontairement par une came 15 qui pousse l'extrémité du levier 6 de soupape. La came est montée sur un arbre 14 manoeuvré par un levier manuel 17 et rappelé élastiquement dans le sens de la séparation de la came et du levier. La distance de poussée de la came est plus petite que celle du poussoir 11 de commande de la soupape. Lorsque ce dernier attaque le levier 6, la came 15 est libérée et rappelée en position de repos. L'invention s'applique au démarrage des moteurs de petite puissance, par un opérateur unique.
Patent FR-2457104-A1 (FR)
Title: Composition de contraste radiologique a base d'iode et son application en angiocardiographie
Inventor: HOPKINS RONALD M
IPC: A61K49/04
Filed: 1980-05-20
Abstract: L'INVENTION A TRAIT AU DOMAINE DU DIAGNOSTIC MEDICAL. ELLE CONCERNE DES COMPOSITIONS DE CONTRASTE RADIOLOGIQUE CONTENANT ENVIRON 34 A 40 D'IODE, COMPRENANT UNE SOLUTION AQUEUSE D'UN MELANGE D'UN MILIEU NON IONIQUE ET D'UN MILIEU IONIQUE DE CONTRASTE RADIOLOGIQUE, CETTE COMPOSITION AYANT UNE VISCOSITE A 37C N'EXCEDANT PAS ENVIRON 9-12MPA.S, LE MILIEU NON IONIQUE ET LE MILIEU IONIQUE DE CONTRASTE RADIOLOGIQUE AYANT, RESPECTIVEMENT, EN SOLUTION AQUEUSE A 37C, UNE VISCOSITE SUPERIEURE ET UNE VISCOSITE INFERIEURE A CELLE DE LA COMPOSITION A 37C. LA SURETE CARDIAQUE ET LA SURETE SYSTEMIQUE DE CES COMPOSITIONS SONT SUPERIEURES A CELLES DU MILIEU IONIQUE DE CONTRASTE RADIOLOGIQUE CONSIDERE SEUL. APPLICATION A DES METHODES ANGIOGRAPHIQUES.
Patent FR-2485195-A1 (FR)
Inventor: GUEN HENRI LE
IPC: G01N1/24
Filed: 1980-06-19
Abstract: 1. Device for collecting a gas mixture and for sampling with a view to analysing the constituents of the mixture, applicable in particular to measuring the pollution agents emitted by automobile vehicles, comprising a mixer tube (3) into which opens the gas exhaust pipe (1), a sucking fan (5), with a rate of flow remaining substantially constant, connected to the downstream end of the mixer tube (3) in order to deliver the mixture in an evacuation pipe (7), the mixer tube (3) acting as dilution chamber (4) and also as heat exchanger, and a probe (10) for sampling the mixture of gaz and air which is located in the downstream part of the tube (3) forming the dilution chamber (4), characterized in that the upstream end part (2) of the mixer tube (3) surrounds the downstream end part of the exhaust pipe (1) forming a free space between the two tubes (2, 3) to allow dilution air to enter.