baber/WOPTO huggingface dataset:
Patent EP-0042038-A1 (EP)
Inventor: ALBRECHT KLAUS
IPC: G01F23/24
Filed: 1981-03-23
Abstract: Bei einer Einrichtung zum elektrischen Überwachen des Niveaus einer in einem Behälter enthaltenen Flüssigkeit sind mehrere temperaturabhängige Widerstandssonden (1, 2, 3, 4), die in die zu überwachende Flüssigkeit eintauchen, eine an die Widerstandssonden (1, 2, 3, 4) anschließbare Konstantstromquelle (6), die durch eine Einrichtung zur Ablaufsteuerung (18) gesteuert an die Widerstandssonden (1, 2, 3, 4) anschließbar ist, duch die Einrichtung (18) gesteuerte Mittel zum Erfassen und Speichern der an den Widerstandssonden (1,2,3,4) abfallenden Anfangsspannung zu einem Anfangszeitpunkt und der Meßspannung zu einem definierten Zeitpunkt nach Anschluß der Konstantstromquelle (6), sowie Mittel zum Auswerten dieser Spannungen durch Subtraktion der Meßspannung von der Anfangsspannung und gegebnenfalls Umkehr der Differenz zum Bilden einer dem Niveau entsprechenden Anzeigespannung vorhanden. Ferner sind ein Festwertspeicher (15) eines Vorrats von Festwertspannungen, von denen jeweils eine in Abhängigkeit von der jeweils aktiven Widerstandssonde (1, 2, 3, 4) auswählbar ist, sowie ein Summierer (14) vorhanden, der zur Bildung der Anzeigespannung mit der ausgewerteten, der Eintauchtiefe der aktiven Widerstandssonde (1, 2, 3, 4) analogen Spannung sowie mit der der Höhe dieser Widerstandssonde zugehörigen Festwertspannung beaufschlagbar ist.
Patent EP-0043412-A1 (EP)
Inventor: HUEBENER JOERG
IPC: F04B15/08
Filed: 1981-04-24
Abstract: The frictional heat occurring at the pump piston of a single-action liquid-helium pump, the flow resistances in the area of the valves (11, 12) and the dead spaces of the piston (13) must be kept as small as possible. The liquid-helium pump proposed is of compact construction and allows an increased mass flow with high differential pressures. The cylinder is constructed to be conical at its end accommodating the inlet and the outlet valve (11, 12), like the piston (13) exhibiting a mechanical seal (23, 24). This makes it possible to dimension the cross-section of the piston rod (27), which is exclusively subject to tensile stress, to be smaller and completely to omit a spring required for supporting the thrust movement in known pumps. <IMAGE>
Patent EP-0040726-A1 (EP)
Inventor: MESSMER JUERGEN
IPC: B43K7/02
Filed: 1981-05-07
Abstract: Ball-point pen cartridges have at their writing tip a rotatably mounted writing ball (12) which is connected via a connection tube to a widened storage space (10) which contains the writing fluid. In the case of large-capacity cartridges, a silicone plug (14) is provided in the rear end of the storage space (10), which silicone plug follows the meniscus of the writing fluid during use. The outer end (16) of the tube is closed off by a closure plug (18). This closure plug (18) has an air passage (20) which is sealed by a pin (22) during storage and transport. This pin (22) has to be removed, i.e. broken off, for use so that the air passage (20) is free and the cartridge can be used. <IMAGE>
Patent EP-0041683-A1 (EP)
Inventor: KOHL HELMUT DR
IPC: G01N33/72
Filed: 1981-06-02
Abstract: A test agent for the detection of coupling compounds in liquids is described, which essentially consists of an adsorbent matrix containing a diazonium salt as the reagent and a phosphonium salt to stabilize said test agent. Furthermore there is described a process for the preparation of said test agent.
Patent EP-0069792-A1 (EP)
Inventor: LYONS CHARLES EDWARD
IPC: C08F287/00
Filed: 1981-07-13
Abstract: Styrene is polymerized employing a free radical initiator in the presence of a styrene-diene block copolymer of the AB or AB(BA) n  configuration to provide a polymer containing from about 15 to 30 weight percent diene units polymerized therein. The polymer contains polydiene domains in the form of rods and spheres having diameters of 70 nanometers or less.
Patent EP-0049413-A1 (EP)
Inventor: ROTH DONALD J
IPC: B65D41/44
Filed: 1981-09-21
Abstract: A closure for a container having a small diameter neck at the upper end of a generally frusto-conical upper end portion of the body of the container, the neck being formed as a curl and providing a pour opening which is closed by a thin sheet metal plug (40) having a cylindrical wall closed at its lower end by a radial wall, both walls being expanded to underlap the lower edge of the neck, the upper end of said cylindrical wall being curled outwardly against a sealing agent on the upper end of the neck curl. The radial wall, the cylindrical wall and the curl portion are scored (52) to form a tear strip which is connected to a tab (55) which overhangs the body portion of the container and is operative upon being upwardly pulled to tear the tear strip and thus rip open the closure for easy removal.
Patent EP-0049934-A1 (EP)
Title: Optically readable information disk
Inventor: VAN DEN BROEK ARNOLDUS JOHANNE
IPC: G11B7/26
Filed: 1981-10-12
Abstract: Optically readable information disc having a radiation cured lacquer layer comprising an optically readable information track whereby the lacquer layer has a minimum identation hardness which corresponds to a maximum depth of penetration of 5 µm of a needle which is placed on the lacquer layer and which has a ball-shaped tip manufactured from a hard material and having a diameter of 18 ± 1 µm and presses on the layer with a weight of 2.5 ± 0.1 g.
Patent EP-0051900-A1 (EP)
Title: Box opening device
Inventor: VAN GINKEL MANNES
IPC: B31B5/76
Filed: 1981-11-05
Abstract: Box opening device (19, 20) located below a supply hopper (1) for flat folded boxes, provided with hooks (19), that can be pivoted about shafts (22) outside the area of said hopper and can be extended or retracted with respect to said shafts, preferably flaps (14) being present to have the lowermost box fall down in a horizontal position.
Patent EP-0037302-A1 (EP)
Inventor: DORY JACQUES
IPC: G06F5/10
Filed: 1981-03-13
Abstract: Device comprising a main memory (10) and a buffer memory (11). The information resulting from an examination performed by means of a line scan, and each line, labelled by a number, is written into buffer memory. The latter is emptied into the main memory before the arrival of the next line. The main memory operates in write and read mode either alternatively or simultaneously, the rate of reading being higher than the rate of writing. Application to ultrasonic echo graphing. <IMAGE>
Patent EP-0041877-A1 (EP)
Inventor: BEDOURE DANIEL
IPC: H01P5/18
Filed: 1981-05-19
Abstract: 1. A microwave coupler comprising two parallel wave guides (2, 5) having a common conducting wall (7) the thickness of which is approximately lambda go/4, lambda go constituting the guided wavelenght corresponding to the center of the desired frequency band, this wall being provided with slots (31, 32, 33, 34, 35) extending parallelly to the crocc-section of the two wave guides (2, 5), characterized in that, the wave guides to which the coupler is connected having two ribs, the two wave guides (2, 5) of the coupler comprise each a rib (10, 15) extending parallelly to the direction of propagation in the wave guide, each rib (10, 15) being attached to that wave guide wall which is parallel to the common wall (7), this common wall being without rib.
Patent EP-0059431-A1 (EP)
Inventor: SULZBACH REINHARD ALBERT DR
IPC: C07D303/48
Filed: 1982-02-25
Abstract: Die Trennung von Gemischen von Hexafluorpropylenoxid und Hexafluorpropylen wird durch Extraktivdestillation in Gegenwart von Methylenchlorid durchgeführt, wodurch ein ausgezeichneter Trenneffekt bei geringem Energieverbrauch erzielt wird.
Patent EP-0064633-A1 (EP)
Inventor: LEHKY PAVEL DR
IPC: C07C51/31
Filed: 1982-04-21
Abstract: 1. Process for the production of 3,3-dimethyl glutaric acid from isophorone, characterized by treating isophorone with hydrogen peroxide in the presence of strong acids at temperatures of from 10 to 80 degrees C.
Patent EP-0070397-A1 (EP)
Inventor: SCHROEDER WOLFGANG DR
IPC: B01J23/74
Filed: 1982-06-19
Abstract: Morpholin und andere cyclische Imine erhält man durch Umsetzung von Diethylenglykol und anderen, entsprechenden Diolen mit Ammoniak unter hydrierenden Bedingungen in der Gasphase in Gegenwart eines Katalysators, der Kupfer, eine geringere Menge Nickel und Aluminiumoxid enthält.
Patent EP-0071081-A1 (EP)
Inventor: NAARMANN HERBERT DR
IPC: C08G65/00
Filed: 1982-07-14
Abstract: Die Erfindung betrifft ein Verfahren zur Herstellung hochmolekularer Polyphenylenäther aus einwertigen Phenolen die in den beiden ortho-Stellungen oder zusätzlich in einer meta-Position, nicht aber in der para-Stellung Alkylsubstituenten aufweisen, durch oxidative Kupplungsreaktion mit Sauerstoff bei Temperaturen zwischen 10 und 25°C, in Anwesenheit eines Katalysatorkomplexes aus einem Kupfersalz und einem N-substituierten Imidazol in Gegenwart eines aromatischen C8- bis C10-Kohlenwasserstoffs als Lösungsmittel. Bevorzugt verwendet wird als Imidazol N-Methyl-, N-Athyl-, N-Isopropyl-, N-n-Butyl- N-Cyclohexyl-, N-Octyl- oder N-Phenylimidazol, und zwar zweckmäßig in Mengen von 0,5 bis 5 Gewichtsprozent.
Patent EP-0071096-A1 (EP)
Inventor: EICKEN KARL DR
IPC: A01N47/34
Filed: 1982-07-15
Abstract: Substituted N-aminomethylhaloacetanilides of the formula   <IMAGE> where R1 and R2 are each C1-C2-alkyl, R3 is hydrogen or C1-C4-alkyl, R4 is cyano or -CO-NH2, R5 is C1-C6-alkyl and X is halogen, are used for controlling undesirable plant growth.
Patent EP-0071226-A1 (EP)
Inventor: HARVEY MARC
IPC: A41D17/02
Filed: 1982-07-26
Abstract: A pair of identical leggings (1), in one piece, is disclosed and is adapted to cover the front and sides of a cyclist's legs as well as the feet (5) to protect the cyclist from rain, while providing adequate ventilation. The side edges of the leggings are provided with elastic strip material (10) to ensure that the leggings remain on contact with the legs, even when the knees are flexed. Attachment means (9) are provided at the waist and upper rear portion of each leg (11). Retaining means (7) are provided all along the perimeter of the foot portion of the leggings.
Patent EP-0072022-A1 (EP)
Inventor: PETSCH JOHANN
IPC: H02P7/03
Filed: 1982-08-10
Abstract: Es wird eine digitale Stromregelschaltung insbesondere für einen Gleichstrommotor beschrieben, der über mit Impulsmodulation gesteuerte Leistungstransistoren (T1-T4) direkt, d.h. ohne Leistungstransformatoren vom Wechselstromnetz gespeist werden und im 4-Quadranten-Betrieb arbeiten kann. Besonderheiten der Stromregelschaltung sind ein A/D-Wandler (12), der aufgrund einer Abtastung des Motorstroms ein Istwertsignal als binären Code aus einer Mehrzahl von Bits erzeugt, und ein binäres Vergleichsschaltwerk, das den Istwertcode mit einem aus einer Anzahl parallel zugeführter Bits bestehenden Sollwertcode vergleicht und binäre Fehlersignale erzeugt, wenn der Istwert den Sollwert überbzw. unterschreitet. Da die Endstufe (LS) ohne Leistungsübertrager unmittelbar am Wechselstromnetz liegt, muss die das Vergleichsschaltwerk enthaltende Steuerstufe galvanisch von der Endstufe getrennt sein. Erfindungsgemäss werden die Bits des Istwertcodes über eine optoelektronische Koppeleinrichtung (14) in die Steuerstufe übertagen Weitere Optokoppler (16, 30) können für die Übertragung sonstiger Steuersignale vorgesehen sein.
Patent EP-0083001-A1 (EP)
Title: Kraftstoffeinspritzsystem für Kraftstoffdirekteinspritzung bei Brennkraftmaschinen
Inventor: GRIESHABER HERMANN
IPC: F02M45/04
Filed: 1982-12-09
Abstract: Es wird ein Kraftstoffeinspritzsystem vorgeschlagen, bei dem je ein Ventil für die Voreinspritzmenge und für die Haupteinspritzmenge vorgesehen ist, und jedes der Ventile mehrere Einspritzöffnungen (16, 17) aufweist. Dabei sind die Einspritzöffnungen (16) für die Voreinspritzmenge kleiner als die für die Haupteinspritzmenge. Ferner bilden die Einspritzstrahlen der Voreinspritzmenge einen Spitzen Kegelwinkel (α1), der kleiner ist als der Spitzenkegelwinkel (α2) der Haupteinspritzstrahlen. Durch Verwendung zweier Einspritzpumpen können Einspritzmenge als auch Einspritzzeitpunkt für sowohl Voreinspritzmenge als auch Haupteinspritzmenge exakt und unabhängig gesteuert werden.
Patent EP-0072059-A1 (EP)
Inventor: MAYER ANDREAS
IPC: F02B33/42
Filed: 1982-07-15
Abstract: In order to limnit the exhaust particulate emission when supercharging a pressure wave machine-supercharged internal combustion engine, an exhaust particulates filter is arranged in the high-pressure part of the exhaust gas system ahead of the pressure wave machine. By increasing the supply of fuel to the engine itself and/or briefly closing a charge air flap valve a recirculation flap valve and/or brief opening of a exhaust gas by-pass valve, the exhaust gas attains the combustion temperature of soot components deposited on the surface of the filter. These soot components are burned off, and the filter is automatically regenerated.
Patent EP-0063005-A1 (EP)
Inventor: ADAMS LONNIE DEAN
IPC: G01N33/52
Filed: 1982-04-01
Abstract: A method for staining a substance capable of binding silver and which is supported in a matrix, comprises equilibriating the substance in an aqueous silver salt solution; rinsing the substance in water; treating the substance with a reducing solution; and immersing the substance in a first and then a second, aqueous carbonate or sulfate salt solution. The substance may be proteinaceous or a polypeptide. Prior to equilibration, the substance may be fixed, and washed in a mildy acidic alkanol solution. 
     For use in the method, a kit comprises a plurality of containers each containing a reagent selected from a silver salt, a base solution, borohydride, an aldehyde solution and carbonate or sulfate salt.
Patent EP-0074160-A1 (EP)
Inventor: MEHESZ STEPHEN VON
IPC: A61N1/32
Filed: 1982-06-01
Abstract: Method of influencing biological activity which comprises generating electrically dependent oscillations, usually of audio frequency, in a liquid medium such as tap water in which living organisms are immersed or with which living organisms are otherwise contacted so as to influence their growth. Examples of the organisms are seeds and eggs. 
     In addition is disclosed apparatus for influencing biological activity comprising
     (a) an audio frequency electric signal generator (3),   (b) two or more electrodes (1) electrically connected to the signal output of said generator and   (c) means for maintaining an electrically conducting liquid medium in contact with said electrodes, for example a tank (2) in which the electrodes are immersed.
Patent EP-0077236-A1 (EP)
Inventor: LARDELLIER ALAIN M J
IPC: F01D5/30
Filed: 1982-09-28
Abstract: The blade segment (1) comprises a single foot (3) having at least one circular rib (5, 6) which is engaged in a circular groove (7, 8) provided on the upstream face of the rim of the disc (9), the segment being held bearing against the disc (9) by a flange (10) fastened to the upstream face of the disc. The invention is used for the production of turbo-machine rotors. <IMAGE>
Patent EP-0077271-A1 (EP)
Title: Procédé et dispositif de soutènement provisoire des parois latérales d'une tranchée
Inventor: COUR FRANCIS RAYMOND
IPC: E02D17/08
Filed: 1982-10-11
Abstract: Une tranchée (11) étant creusée sous la conduite (6), un corps compressible ou coercible, constitué par une enveloppe (13), souple et déformable, amenée à l'état replié et/ou enroulé sur elle-même, et remplie d'eau par le groupe de pompage (19) pour être dêployée dans le divergent (17), est progressivement substitué aux matériaux évacués lors du creusement de la tranchée (11). Puis la descente de la conduite (6) et son positionnement dans la tranchée (11) sont pilotés grâce à un débit de fuite de l'eau hors de l'enveloppe (13) au travers d'orifices (22) ou de clapets.
Patent EP-0069066-A1 (EP)
Inventor: HOWELL FREDERICK HAROLD DR
IPC: C07C303/22
Filed: 1982-06-14
Abstract: Es werden neue Resorcinole der Formel I <IMAGE> und Salze davon mit Säuren oder Basen beschrieben, worin W Wasserstoff, Halogen, n-Alkyl mit 1-5 C-Atomen, -NHCOR¹, -COR¹ oder gegebenenfalls durch eine oder zwei C1-12-Alkylgruppen substituiertes Phenoxyacetylamino, X Wasserstoff, Chlor, Brom, -SR¹¹ oder den Rest eines über ein Ring-N-Atom gebundenes N-Heterocyclus Y eine Gruppe der Formel II <IMAGE> Q -COOR<4>, -CONR<4>R<5>, -OR<5>, -OCOR<6>, -NR<7>R<8>, -PO(OR<9>)-[Q]xR¹° mit x = 0 oder 1, -SO2OH, -SO2NR<4>R<5> oder -CN bedeuten und R¹ bis R¹¹ die im Patentanspruch 1 angegebene Bedeutung haben. Die Verbindungen (I) finden Anwendung als schwarze Farbkuppler in photographischen Materialien.
Patent EP-0094472-A1 (EP)
Inventor: HOLM KURT ANDERS
IPC: H05K3/26
Filed: 1982-05-14
Abstract: A roller brush (9) is horizontally arranged in a solvent vessel (7). The essentially vertical portions of the lateral surface of the brush (9) are sealingly surrounded by contour plates (11,12). The contour plates are sealingly connected to a cover (14-16) which is in turn sealingly connected to the edge of the vessel. The brush (9) is partially immersed in the solvent and is driven for rotation. The contour plate (11) which is conjoined to the upwardly moving peripheral portion of the rotating brush (9), extends down into the solvent so that the brush, in cooperation with the contour plate (11), pumps solvent up to the scrubbing area as the brush rotates. A conveyor path (1) for objects to be cleaned extends through the upper peripheral portion of the brush. The bristles of the brush (9) form, in cooperation with the cover (14-16) and the contour plates (11,12), a seal between the interior of the vessel and the surroundings of the vessel.
Patent EP-0074360-A1 (EP)
Inventor: KANTNER ALEXANDER
IPC: F25B49/00
Filed: 1982-03-02
Abstract: Dans une pompe a chaleur qui comprend un separateur (1), un bruleur (4), un condenseur (13), un organe d'etranglement (15), un organe de recyclage, un evaporateur (17) et un consommateur (24), un dispositif de reglage (12) doit reduire au minimum l'entree d'energie primaire dans le separateur en fonction de la demande de chaleur et doit simultanement assurer une circulation suffisante en solvant et en fluide frigorigene pour optimiser la circulation interne de la pompe a chaleur. A cet effet, la pression ou la temperature regnant dans la partie haute pression de la pompe a chaleur est utilisee comme variable reglee, et la demande de chaleur du consommateur comme valeur perturbatrice.
Patent EP-0076805-A1 (EP)
Title: Ensemble de freins
Inventor: DANKS HECTOR REDMOND
IPC: F16D59/02
Filed: 1982-04-08
Abstract: Ensemble de freins ameliore pouvant etre utilise pour freiner automatiquement un arbre entraine ou analogue. L'ensemble de freins (18) comprend un disque de frein rotatif (26) autour duquel un patin de frein fixe (27) d'un cote du disque et un patin de frein mobile (28) de l'autre cote du disque sont actionnes automatiquement pour serrer et relacher le disque. Le dispositif d'actionnement comprend un ensemble de beliers hydrauliques (40) comprenant un piston (41) maintenu par un ressort enroule (43) dans la position d'engagement. Un levier d'actionnement (37). connecte au belier, fait tourner le patin de frein mobile qui, au moyen de faces de frotteurs d'accouplement complementaires ou de pieces rapportees helicoidales (34) s'engageant dans des recoins annulaires complementaires (32, 33) provoque l'engagement du patin de frein avec le disque de frein rotatif.
Patent EP-0105871-A1 (EP)
Title: Procede d'atomisation de dispersions ou solutions contenant des particules
Inventor: STIGSSON LARS LENNART
IPC: B05B7/14
Filed: 1982-03-31
Abstract: Procédé d'atomisation de dispersions ou solutions contenant des particules, dans lequel la dispersion ou la solution est déchargée par un ajutage. Avant de quitter l'ajutage, la dispersion ou solution forme un film annulaire rotatif qui est exposé à l'influence d'ondes sonores de haute fréquence pour effectuer la désintégration du liquide.
Patent EP-0091464-A1 (EP)
Title: Method for the preparation of cyano-heterocycles.
Inventor: VORBRUGGEN HELMUT
IPC: C07D213/85
Filed: 1982-10-14
Abstract: Method for the preparation of cyano-heterocycles having the general formula I <IMAGE> wherein W, X, Y and Z represent a nitrogen atom, the CH rest or CR1 rest, with R1 representing a hydrogen atom, an alkyl rest with a straight or branched chain having from 1 to 10 atoms of carbon and being optionally substituted, an aralkyl rest having from 7 to 10 atoms of carbon, an aryl or hetero-aryl rest, a carboxyl, hydroxyl, amino, mono- or di-alkylamino, mono- or di-aryl-amino, alkylsulfonyl, arylsulfonyl, trifluoromethyl group, a halogen substituant, a cyclo-alkyl rest, a cyano group or -OR2 rest, wherein R2 represents a hydrocarbonated rest having from 1 to 10 atoms of carbon with a straight or branched chain, a cyclo-alkyl rest having from 3 to 10 atoms of carbon, aralkyl with 7 to 10 atoms, aryl or hetero-aryl, -COOR3 group, R3 representing a hydrocarbonated rest with 1 to 10 atoms with a straight or branched chain, a cyclo-alkyl rest with 3 to 10 atoms of carbon, aralkyl with 7 to 10 atoms or carbon, phenyl, naphtyl or hetero-aryl or -CONR4 R5, R4 and R5 representing hydrogen, a hydrocarbonated rest with 1 to 10 atoms of carbon with the straight or branched chain, cyclo-alkyl with 3 to 10 atoms, aralkyl with 7 to 10 atoms, aryl or hetero-aryl or else R4 represents hydrogen and R5 represents -COR6 or -SO2 R6, R6 having the same signification as R2; or else, formula wherein W-X, X-Y and Y-Z represent the complement optionally substituted by a rest R1 of an aliphatic, aromatic cycle or heterocycle, which contains one or a plurality of nitrogen, oxygen or sulfure atoms; the method is characterized in that an N-oxyde having the general formula II <IMAGE>wherein W, X, Y, Z and R1 have the same acceptations given hereabove is reacted with a trimethyle-silyle cyanide.
Patent EP-0091950-A1 (EP)
Title: Procede de reduction du niveau des lypoproteines de faible densite dans le serum d'un patient
Inventor: BORDEN ERNEST C
IPC: A61K38/21
Filed: 1982-10-22
Abstract: Un procédé de réduction du niveau des lypoprotéines de faible densité dans le sérum d'un patient sans affecter le niveau des lypoprotéines de densité élevée consiste à administrer au patient des quantités effectives d'interféron de fibroblaste.
Patent EP-0122949-A1 (EP)
Inventor: SASAKI YOSHIYUKI
IPC: D02G3/04
Filed: 1983-04-21
Abstract: A fasciated yarn, consisting of wholly aromatic polyamide fibers, with excellent mechanical properties, especially creep durability in a high temperature atmosphere, suitable for industrial uses. The fasciated yarn can be produced by a method comprising the steps of: stretch-breaking a filament tow (4) of the wholly aromatic polyamide fibers to form a staple fiber bundle (4') and imparting a false-twist to the staple fiber bundle by a vortex (9) while retaining parallelism of the staple fibers composing the bundle. 
     Structural characteristics of the yarn reside in a mean fiber length in the range of from 150 mm to 600 mm, a crimpability of lessthan 5%, a mean degree of parallelism of less than 3°, and a number of wrap fiber groups in a range of from 0.5 to 20 per 1 cm in length of the yarn.
Patent EP-0095595-A1 (EP)
Inventor: RACHEL JOSEF
IPC: F16F15/126
Filed: 1983-05-06
Abstract: In a process for the insertion of an annular body (02) of elastomer material in the gap between the hub body and the rotating ring (01) of an amortizer of torsional vibrations, the ring body is brought to nominal dimensions which are matched to the dimensions of the gap; in this form, the ring body is fixed at a temperature beneath its glass transition temperature, by cooling, so that it is possible to insert it in the gap. On subsequent warming up the ring body attempts to expand and thus forms a force fit on the inner surface of the rotating ring or of the outer surface of the hub body. The cooling can be carried out by dry ice or by liquid nitrogen. <IMAGE>