baber/WOPTO huggingface dataset:
Patent CH-661170G-A3 (CH)
Title: Timepiece with indicator making one revolution in several days
Inventor: RAY CLAUDE
IPC: G04B19/04
Filed: 1985-09-13
Abstract: The date-indicating hand (5) opposite a fixed date-circle, visible at the periphery of the dial (7), is carried by the pipe (12a) of a platform (12) coaxial with the centre of the movement, on which is inset (at 13) a connecting piece (11) having elastic arms (11a) which snap-fit onto the head (9a) of studs (9) carried by a crown (8) making one revolution in thirty-one days at a rate of one instantaneous jump every twenty-four hours. The connecting piece (11) and the platform (12) which is solid therewith may be installed and dismantled whilst the date crown (8) is in place on the plate (17) of the movement, held on this plate by an annulus (16) fixed by screws (18). <IMAGE>
Patent CH-673745G-A3 (CH)
IPC: G03C1/74
Filed: 1983-09-20
Abstract: A process for the multiple coating of objects or webs which are continuously moving past a coating point, using coating apparatus according to the curtain coating process. This process is carried out such that any number of comparatively high viscosity layers is embedded between an accelerating layer which is positioned below the layers and has a viscosity range of from 1 to 20 mPas and a layer thickness of from 2 to 30  mu m, and a spreading layer which is positioned above the comparatively high viscosity layers and has a viscosity range of from 1 to 10 mPas and a layer thickness of from 5 to 20  mu m. By the curtain coating process, coating rates of 400 m/min and more may be achieved with a good coating quality.
Patent CS-145091-A3 (CS)
Title: Isoxazole-4-carboxamides and amides of hydroxyalkylidene cyanacetic acid, medicaments comprising said compounds and their application
Inventor: BARTLETT ROBERT R DR
IPC: C07C255/41
Filed: 1991-05-16
Abstract: Isoxazole-4-carboxamides and hydroxyalkylidenecyanoacetamides, pharmaceuticals containing these compounds and their use Isoxazole-4-carboxamide derivatives and hydroxyalkylidene-cyanoacetamide derivatives are suitable for the treatment of carcinoses. These compounds can be prepared by known processes. Some of the compounds are novel and are additionally suitable for the treatment of rheumatic disorders.
Patent CZ-331692-A3 (CZ)
Title: Mixture for a road layer from electrometallurgical slag and process for producing thereof
Inventor: TODARO PIERRE
IPC: C04B28/08
Filed: 1992-11-05
Abstract: A road foundation compsn. comprises (i) at least 53 wt.% sand or gravel prepd. from electric furnace steelmaking slag, one or more hydraulic binders and at least one setting actuator; or (ii) 93-98 wt.% electric furnace steelmaking slag sand or gravel and 2-7 wt.% at least one binder/activator. Also claimed are processes for prepn. of the compsn. and a road foundation prepd. from the compsn. or by the process.
Patent CZ-133897-A3 (CZ)
Title: Method of improving manufacture of a latex system exhibiting a tendency to flocculate in consequence of grafting, agent of a latex coating composition, ink agent based on water, agent for surface treatment of paper, adhesive preparation without dextrin and a binding agent for non-woven materials
Inventor: JANSSEN BERNARDUS J W
IPC: C09D201/00
Filed: 1995-11-03
Abstract: A process is provided for preparing an acrylic copolymer latex having improved mechanical and shear stability comprising emulsion polymerizing at least one ethylenically unsaturated monomer having up to 23 carbons in the presence of, by weight based on the total monomer content, a) from about 0.05% to about 5.0% of a protective colloid with a molecular weight of less than 75,000, and b) from about 0.01% to about 1.5% of at least one water soluble free radical polymerization initiator. This latex provides coating manufacturers the flexibility of either eliminating surfactants altogether from coating or to use small amounts thereof.
Patent CZ-134093-A3 (CZ)
Inventor: LEDR ZDENEK ING DRSC
IPC: G05D13/62
Filed: 1993-07-02
Abstract: Malá změna otáček vodní turbíny /1/ a tím kmitočtu generátoru
/2/ při velkých změnách zatíženíje docilována elktrickou
nadsynchronní brzdou asynchronního stroje /3/ s
klečovou kotvou s dvojitou klecí soustavy Boucherotovy,
na hřídeli generátoru /2/, přičemž asynchronnístroj /3/vrací
odbrzděný výkon do činného brzdného odporu /10/ přes
synchronní stroj /4/ a s ním spojený stejnosměrný stroj /5/ s
cizím stálým buzením, příkladně ze stejnosměrného zdroje
/8/ s diodovým usměrňovačem, který je připojen paralelně
ke kotvě stejnosměrného stroje /5/, přičemž činný brzdný
odpor /10/ jé připojen paralelně ke kotvě stejnosměrného
stroje /5/přes spínač /9/ a kde spínač /9/je řízen směrovým
relé s cívkami /11/ a /12/.
Patent CZ-174896-A3 (CZ)
Title: Cutting tool
Inventor: BARAZANI GIDEON
IPC: B23B27/10
Filed: 1995-10-20
Abstract: A cutting tool assembly comprising an elongated tool shank (1) having a shank holding portion (8) and an exchangeable adaptor (2) having an insert retaining portion for retaining a replaceable cutting insert (3) and an adaptor mounting portion (42) releasably secured to the shank holding portion (8) by two clamping screws (4). The clamping screws (4) are inserted into the respective adaptor mounting portion through bores (53, 54) and threaded bores (22, 23). The threaded bores (22, 23) being substantially aligned with the respective adaptor through bores (53, 54) in a reference plane through an axis of relative rotation of a workpiece with respect to the tool assembly. One of the adaptor mounting (42) and shank holding portions (8) is formed with a recess and the other one is formed with a protrusion (10) mating with the recess and received therein.
Patent CZ-200180-A3 (CZ)
Title: Material based on polyethylene
Inventor: CECCHIN GIULIANO
IPC: B32B27/32
Filed: 1999-07-02
Abstract: Polyethylene composition comprising (percentages by weight): A) from 60 to 95% of an LLDPE copolymer having a density from 0.905 to 0.9 g/cm3, Mw/Mn values less than 4 and F/E ratio values greater than 20; B) from 5 to 40% of one or more crystalline copolymers of propylene selected from among defined copolymers of propylene with ethylene and/or higher alpha-olefins.
Patent CZ-202012-A3 (CZ)
Inventor: BARTUŠ MICHAL
IPC: B61H13/04
Filed: 2020-01-09
Abstract: Zařízení pro indikaci stavu ruční brzdy, zejména nákladních kolejových vozidel, a k indikaci síly, kterou je ruční brzda utažena, je uzpůsobené k upevnění k podvozku nebo bočnici rámu vozidla. Zařízení je založeno na principu součinnosti vstupní hřídele (36), zubové spojky pozůstávající z kotoučů (38, 48) a výstupní hřídele (35). Zařízení zahrnuje zobrazovací prvek tvořený kruhovým barevným terčem (42) pro indikaci jednotlivých stavů „zabrzděno“ a „odbrzděno“ prostřednictvím velikosti síly přivedené na poloměr ovládacího kola (14). Ovládací kolo (14) je pro přenos kroutícího utahovacího momentu na mechanismus ruční brzdy přes k němu připevněnou vstupní hřídel (36) a zubovou spojku, spojenou s výstupní hřídelí (35) zařízení, napojeno ke koncovému členu pro vyvozování brzdné síly na brzdové kotouče nebo jízdní plochu dvojkolí.
Patent CZ-256795-A3 (CZ)
Title: Derivatives of cycloalkanoindole and cyclalkanoazaindole, process of their preparation, pharmaceutical compositions containing thereof and their use
Inventor: MULLER ULRICH DR
IPC: C07D209/00
Filed: 1995-10-03
Abstract: Cycloalkano-indole derivs. and aza analogues of formula (I) and isomers and salts are new. R1-C=C-R2 = phenyl, pyridyl or a gp. of formula (a), all opt. substd. by 1-3 gps. R'; R8 = H or 1-4C alkyl; R3-C=C-R4 = phenyl, 4-8C cycloalkene or 4-8 membered oxocycloalkane (all opt. substd. by 1-3 gps. R'); R' = independently halo, CF3, COOH, OH, up to 6C alkoxy carbonyl, 1-6C alkoxy, or 1-6C alkyl (opt. substd. by OH or 1-4C alkoxy); R = H, 4-12C cycloalkyl or 1-12C alkyl; A = CO or CS; X = O, S or NR9; R9 = H or 1-6C alkyl (opt. substd. by OH or phenyl); R5 = phenyl or 5-8 membered, opt. unsatd. heterocyclic with 1-3 heteroatoms (S, N and/or O), (both opt. mono- to tri-substd. by NO2, COOH, halo, CN, 2-6C alkenyl, 1-6C alkoxy or alkyl (opt. substd. by OH, COOH, 1-6C alkoxy or up to 6C alkoxycarbonyl; and/or opt. mono- substd. by OR10 or NR11R12); R10 = H, 1-6C alkyl or 2-6C alkenyl; R11, R12 = H, phenyl, 1-6C alkyl, or up to 8C acyl (opt. subst. by NR13R14); R13, R14 = H or up to 8C acyl; R7 = H; R6 = H, COOH, 1-5 alkoxy, or 1-6C alkyl (opt. substd. by OH or OCOR15); or R6+R7 = O; R<15> = phenyl (opt. mono- to tri-substd., by halo, OH or 1-5C alkyl), or 1-22C alkyl or 2-22C alkenyl (both opt. substd. by OR16); R16 = H, benzyl, triphenylmethyl or up to 6C acyl. Also claimed are intermediates of formula (II).
Patent CZ-266697-A3 (CZ)
Title: Salts of clavulanic acid
Inventor: CALLEWAERT GEORGE LEO
IPC: A61P31/04
Filed: 1996-02-21
Abstract: The salts are prepared by reacting a benzhydrylamine of the formula I (or a salt thereof) with clavulanic acid (or a salt thereof) in an organic solvent, and isolating the resulting salt. In formula I, each of R<1> and R<2> is hydrogen (preferred) or an acceptable substituent. <CHEM>   The clavulanic acid salts can be used in pharmaceutical formulations together with a pharmaceutically acceptable carrier, and, optionally, a beta-lactam antibiotic.
Patent CZ-9802953-A3 (CZ)
Title: Dowel for anchoring synthetic fibers of artificial grass to soil as well as a device for introducing the dowel into soil apparatus for making the same
Inventor: FISCHER RAINER
IPC: E01C13/08
Filed: 1998-09-16
Abstract: The peg has a peg body (12) having a unit (20) for receiving the fibres (28). The peg body has a slit (20), a through hole (22), an eyelet or similar for receiving the fibres. The plug has a pull-out lock element (18) which enables the peg to be secured on the ground.
Patent CZ-364097-A3 (CZ)
Title: Method of catalytic hydrogenation of aromatic nitrogenous compounds
Inventor: STUDER MARTIN
IPC: B01J23/648
Filed: 1996-05-07
Abstract: One object of the invention is a process for the catalytic hydrogenation of aromatic nitro compounds in solution or in melt in the presence of hydrogen and at least one noble metal catalyst, nickel catalyst or cobalt catalyst, in which process a catalytic amount of at least one vanadium compounds is present, wherein the vanadium has the oxidation state 0, II. IV or V. It has been found that in the catalytic hydrogenation of aromatic nitro compounds the accumulation of hydroxylamines can be almost completely prevented by the addition of catalytic amounts of vanadium compounds, which usually results in concentrations of < 1 % of hydroxylamine. The resulting hydrogenated products are whiter (purer) than those obtained without the addition of the vanadium compound because almost no azo or azoxy compounds are obtained. The hydrogenation, in particular the final phase, proceeds faster than without said addition. Accordingly, substantial advantages with respect to quality constancy and economy are obtained.
Patent CZ-374696-A3 (CZ)
Title: Tube drawing process
Inventor: BEER GERHARD DIPL ING
IPC: B21C51/00
Filed: 1996-12-18
Abstract: Controlling tube drawing using a die and mandrel involves measuring vibrations in the machine which are compared to an optimum value calibrated as a result of the characteristics of the tube, drawing machine and mandrel. Any deviations from the optimum value are used to regulate the speed of drawing and/or degree of lubrication.
Patent CZ-379690-A3 (CZ)
Title: Purification process of aminomethylene acids
Inventor: GARLICH JOSEPH R
IPC: C07F9/38
Filed: 1990-07-31
Abstract: High purity ethylenediaminetetra(methylenephosphonic acid) and 1,4,7,10-tetraazacyclododecane1,4,7,10-tetra(methylenephosphonic acid) are prepared by dissolving the aminomethylenephosphonic acid in an aqueous base, acidifying with a mineral acid at an elevated temperature to precipitate the crystals, maintaining the solution at an elevated temperature for a period of time sufficient to assure crystallization, cooling to a lower temperature and maintaining at that temperature for a time sufficient to precipitate the crystals and filtering the resulting crystals at that temperature, washing the crystals with water and recovering the desired high purity aminophosphonic acid. The ethylenediaminetetra(methylenephosphonic acid) is obtained in a purer state during its synthesis if the crystals are filtered hot without prior cooling.
Patent CZ-385597-A3 (CZ)
Title: Method of silk-screen printing onto a hard non-absorptive substrate and a screen used during printing
Inventor: COLLINS TERENCE WILLIAM
IPC: B41F15/34
Filed: 1996-05-21
Abstract: A method of screen printing on to a hard non-absorbent substrate (1) involves using a screen (10) which has an ink permeable area (B) whose pattern corresponds to whatever is to be printed. The area B is divided into two parts (X and Y). Part X is of normal, maximum ink carrying capacity and part Y is of reduced ink carrying capacity. The ink carrying capacity of the reduced ink carrying capacity part Y is determined by the extent to which it is coated with ink/impenetrable emulsion (20), the size of the pores (18) in the screen (10) and the type of ink used. The ink carrying capacity of the part Y reduces with distance away from part X. The emulsion coating (20) may be in the form of dots (200), with the dots (200) increasing in diameter with distance away from part X. During printing, the reduced ink carrying capacity part Y is located over the edge region (E) of the substrate (1), and the substrate is printed up to but not on to its edge (6).
Patent CZ-500890-A3 (CZ)
Title: Purified and isolated polypeptide, use thereof, DNA sequence for its expression and pharmaceutical composition
Inventor: ZSEBO KRISZTINA M
IPC: C12P21/08
Filed: 1990-10-15
Abstract: Non-naturally occurring polypeptide (I) is claimed, whose aminoacid sequence is similar enough to naturally-occurring stem cell factor (SCF) to give it the same haematopoietic biological activity. (I) is produced by eukaryotic or prokaryotic expression of an exogeneous DNA sequence, and has in vivo and in vitro biological activity. Also claimed are a DNA sequence encoding (I), a host transformed with the DNA sequence, a process for producing and recoverng SCF, a DNA sequence encoding a human SCF analogue, an antibody that binds SCF, a compsn.; of (I) with a water-soluble polymer, a method of preparing the above compsn. and a method of transfecting early haematopoietic stem cells. Routes of administration are e.g. parenteral, pulmonary, nasal and oral.
Patent ES-475415-A3 (ES)
Title: An improved lifting jack.
IPC: B65F/
Filed: 1978-11-25
Abstract: This invention provides a jack equipped with a casing, a rotating nut mounted on this casing, a ring gear coaxially fastened to the nut, driving equipment including a pinion connected to the gear for rotating the nut, a lead screw housed in the casing and coupled to the nut, which has the means of connecting to the load, the casing having a base and a constant cross-section tube mounted by one end on to the base, and a housing element mounted on the tube to house and mount the rotating pinion.
Patent SK-127295-A3 (SK)
Title: Stabilized polypropylene fiber and increasing method of resistance and heat stability of polypropylene fiber
Inventor: HORSEY DOUGLAS W
IPC: C08K5/34
Filed: 1994-04-06
Abstract: Blends of long chain N,N-dialkylhydroxylamines, selected phosphites and selected hindered amines are surprisingly effective in providing processing, long term heat aging and light stability performance and especially gas fade resistance to polypropylene fibers in the absence of a traditionally used phenolic antioxidant.
Patent SK-128595-A3 (SK)
Title: Izosters ethers of aspartate-protease substrate, preparation method thereof and intermediate products containing them and their use
Inventor: BOLD GUIDO
IPC: C07D213/65
Filed: 1995-10-17
Abstract: Disclosed are ethers of general formula (I), wherein R1 is acyl radical selected from the complex comprising optionally substituted (lower)alkoxy(lower)alkanoyl, optionally substituted lower alkanoyl, arylcarbonyl or heterocyclylcarbonyl, which are substituted by heterocyclyl or heterocyclyl(lower)alkyl, phenyl(lower)alkanoyl, which are substituted by hydroxyl or lower alkyl, and arylsulphonyl, or amino acid residue, which can be acylated on nitrogen of amino by one of said acyl radical, R2 and R3 are independently always cyclohexyl, cyclohexenyl, phenyl, naphthyl or tetrahydronaphthyl which is optionally substituted, R4 is lower alkyl, cyclohexyl or phenyl, R5 is lower alkyl and n is 1 or 2 and salts thereof. These compounds have antiretroviral effects and are effective against HIV. Disclosed is also process for their production, intermediates for this process, pharmaceutical preparation containing them and their use.
Patent SK-142497-A3 (SK)
Title: Recombinant dna molecule, vector, transformed host, an antibody, cell culture and cell system, transgenic mammals, pharmaceutical composition, method of testing drug, assay system suitable for such method, and use of pharmaceutical composition
Inventor: SCHACHNER MELITTA
IPC: C07K14/705
Filed: 1996-04-19
Abstract: The invention features a method for promoting neural growth in vivo in the mammalian central nervous system by administering a neural cell adhesion molecule which can overcome inhibitory molecular cues found on glial cells and myelin to promote neural growth. Also featured active fragments, cognates, congeners, mimics, analogs, secreting cells and soluble molecules thereof, as well as antibodies thereto, and DNA molecules, vectors and transformed cells capable of expressing them. The invention also includes transgenic mouse lines expressing a neural adhesion molecule in differentiated astrocytes, and cells and tissues derived therefrom. The expression of the neural adhesion molecule enhances neurite outgrowth on central nervous system tissue derived from these transgenic mice. The invention also features methods for enhancing neuronal outgrowth of CNS neurons, for enhancing memory and for increasing synaptic efficacy. Also featured are methods of testing drugs which modulate the effects of the neural adhesion molecule, and assay systems suitable for such methods.
Patent SK-175197-A3 (SK)
Title: 1,3-disubstituted ureas - acat inhibitors and process for their preparation
Inventor: OREMUS VLADIMIR
IPC: A61K31/4409
Filed: 1997-12-19
Abstract: The invention relates to 1,3-disubstituted ureas of general formula (I) where R1 is an alkyl or an aryl, R2 is nitro and/or a mino, and X is oxygen and/or sulfur, and the method of preparing thereof which consists in treating aromatic amines with isocyanat es. Isocyanates may be formed in situ and the reaction carried ou t in toluene, at 80 ~C. If the nitro group is formed, it is reduc ed with hydrogen in the presence of palladium catalyst to the ami no group. The obtained 1,3-disubstituted ureas are inhibitors of the activity of the acyl co-enzyme A: cholesterol acyltransferase (ACAT) enzyme, and may be used to inhibit cholesterol esterifica tion and absorption in hypercholesterolemia.
Patent SK-582020-A3 (SK)
Inventor: MARTINKA JOZEF
IPC: G06N3/00
Filed: 2020-06-02
Abstract: Opisuje sa spôsob identifikácie druhu horiacej látky rozoznaním fotografie jej plameňa v natrénovanej neurónovej sieti. Neurónová sieť je pred jej aplikáciou na identifikáciu druhu horiacej látky natrénovaná fotografiami plameňov minimálne dvoch druhov horiacich látok a požadovanými výstupnými hodnotami identifikujúcimi druh horiacej látky.
Patent AT-509767-A3 (AT)
Title: Verfahren und vorrichtung zum einfädeln einer faserstoffbahn in einem aufwickler
IPC: B65H19/28
Filed: 2011-03-22
Abstract: Die Erfindung ist ein Verfahren zum klebstofffreien Einfädeln einer Faserstoffbahn zum Aufwickeln auf einen Wickelkörper und umfasst die folgenden Schritte: Umlenken der Faserstoffbahn in Umfangsrichtung des Wickelkörpers, Führen der Faserstoffbahn mit ihrer ungefalteten Vorderkante voraus in Richtung eines zwischen dem Wickelkörper und einer Walze gebildeten Walzenspalts, und Mitnahme der Vorderkante der Faserstoffbahn durch Wechselwirkung mit der Faserstoffbahn und/oder dem Wickelkörper. Eine mit der Erfindung vorgeschlagene Vorrichtung zum klebstofffreien Einfädeln einer Faserstoffbahn zum Aufwickeln auf einen Wickelkörper, hat eine Umlenkeinrichtung zum Umlenken der Faserstoffbahn inUmfangsrichtung des Wickelkörpers und eine Führungseinrichtung zum Führen der Faserstoffbahn mit ihrer ungefalteten Vorderkante voraus in Richtung eines zwischen dem Wickelkörper und einer Walze gebildeten Walzenspalts.
Patent WO-9840133-A3 (WO)
Inventor: RIBARITS LADISLAUS PETER
IPC: A63C17/14
Filed: 1998-03-09
Abstract: Bremsvorrichtung für einen, vorzugsweise einspurigen, Rollschuh mit an einem Träger (3) hintereinander angeordneten Rollen (4), einem über den Schuhschaft (2) bzw. Schuhhals (2') des Rollschuhs betätigbaren Bremsschwenkhebel, und einem über den Bremsschwenkhebel in Längsrichtung des Trägers (3) verschiebbaren, auf eine oder mehrere der Rollen (6) einwirkenden Bremsschieber (6), wobei der Träger (3) mit dem Schuhteil (1) des Rollschuhs an dessen Unterseite verbunden oder verbindbar ist, und wobei der Bremsschwenkhebel zumindest aus einem Betätigungsarm (11, 11') und zumindest einem mit dem Bremsschieber (6) in Wirkkontakt, vorzugsweise Stoßkontakt, stehenden Angriffsarm (12) gebildet ist, und die Schwenkachse (13) des Bremsschwenkhebels auf dem Träger (3) oder auf dem Schuhteil (1) des Rollschuhs angeordnet ist, wobei das freie Ende des Betätigungsarmes (11, 11') durch Bewegung des Schuhschafts (2) bzw. Schuhhalses (2') verschwenkbar ist, und der Bremsschieber (6) im wesentlichen in der durch die Rollendrehachsen (5) aufgespannten Ebene verschiebbar ist.
Patent BE-1006829-A3 (BE)
Title: Compositions pharmaceutiques solides.
Inventor: NAGY MARGIT NEE KRICSFALUSSY
IPC: A61K47/46
Filed: 1991-07-19
Granted: 1995-01-03
Abstract: L'invention fournit des compositions pharmaceutiques solides, de préférence des gélules de gélatine tendre, comprenant un composant actif sensible à la lumière éventuellement à peine soluble dans l'eau, de préférence la nifédipine (4-2'-nitrophényl)-2,6-diméthyl-3,5-dimthoxycarbonyl-1,4-dihydropyridinel), avec des supports et/ou agents auxiliaires classiques, ces compositions comprenant un colorant végétal. De plus, l'invention concerne le préparation de ces compositions. L'incorpoation d'un colorant végétal dans la masse de remplissage de la gélule et éventuellement dans la paroi de la gélule assure une protection fiable contre la lumière pendant les opérations de fabrication et de remplissage et améliore la solubilité de la nifédipine dans certains supports.
Patent BE-1006415-A3 (BE)
Title: Steigerafdekking.
IPC: E04G5/12
Filed: 1993-06-03
Granted: 1994-08-16
Abstract: Afdekking aan te brengen op een tegen te plaatsen steiger. Deze afdekking bestaat uit op de vrije  uiteinden vand e steiger te platsen koppelstukken waarop koppelprofielen op verstelbare wijze worden aangebracht. Daarmee zijn dwarsprofielen verbonden, die op hun beurt verbonden zijn met langsprofielen. Tussen de langsprofielen is een doek aangebracht. Op deze wijze wordt een eenvoudig monteerbaar en zeer weersbestendige constructie verkregen.
Patent BE-1007518-A3 (BE)
Title: Mat de support pour le soutien de filets de camouflage.
Inventor: SCHUCHARDT WOLFGANG
IPC: E04H12/22
Filed: 1993-09-24
Granted: 1995-07-25
Abstract: Mât de support dans lequel le mât de support est configuré en forme de tube à son extrémité côté sol, la bordure libre côté embouchure est configurée avec des dents, et la zone tubulaire présentant les dents est configurée en forme de douille d'enfichage pouvant être insérée par son extrémité dans le corps tubulaire du support. Il se caractérisé en ce que la douille d'enfichage (2) présente aux deux extrémités (4,5), dans la zone débordant hors du corps tubulaire du support (1), la forme d'un cylindre, et est rétrécie au moins légèrement entre les exrémités cylindriques (4,5).