baber/WOPTO huggingface dataset:
Patent FR-2502025-A1 (FR)
Title: Forced circulation air dryer - employing calcium chloride desiccant on a bed of inert material
IPC: B01D53/26
Filed: 1981-03-23
Abstract: A dryer employing a CaCl2 dessicant bed uses an induced draught fan to force air circulation through the dessicant. In order to prevent CaCl2 dissolving in the absorbed moisture, the dessicant is supported on a bed of inert but porous material e.g. coke, to absorb free moisture. When the bed of supporting material is satd. free water drops into a collecting area in the base of the dryer. The dessicant bed does not solidify due to liquefaction in the absorbed moisture followed by subsequent recrystallisation.
Patent FR-2479069-A1 (FR)
Title: Scie a chaine a commande mecanique
Inventor: TAKAHASHI HIROSHI
IPC: B27B17/00
Filed: 1981-03-25
Abstract: SCIE A CHAINE A MOTEUR. ELLE COMPREND UN BLOC-CYLINDRE 4 ET UN CARTER 3 SOLIDAIRE D'UNE ENVELOPPE 5 DIRIGEE VERS L'AVANT, A LAQUELLE EST INCORPORE UN CARBURATEUR 9. UNE POIGNEE PRINCIPALE 25 EST SITUEE SUR LE COTE SUPERIEUR DU GROUPE MOTEUR 1 ET S'ETEND LONGITUDINALEMENT ENTRE L'EXTREMITE ARRIERE ET LA PARTIE SUPERIEURE AVANT DE CE GROUPE 1, PLUS PRES DU CENTRE DE GRAVITE DE CE DERNIER QUE DANS LES SCIES A CHAINES COURANTES. AVEC CETTE STRUCTURE, IL EST POSSIBLE A L'OPERATEUR DE MANIER LA SCIE D'UNE SEULE MAIN EN LA TENANT PAR LA POIGNEE PRINCIPALE.
Patent FR-2479255-A1 (FR)
Title: Procede d'hydrocraquage d'hydrocarbures lourds utilisant du gaz de synthese
Inventor: PATMORE DAVID J
IPC: C10G47/00
Filed: 1981-03-26
Abstract: PROCEDE D'HYDROCRAQUAGE D'HYDROCARBURES LOURDS UTILISANT DU GAZ DE SYNTHESE. UNE CHARGE D'HUILE HYDROCARBONEE LOURDE ET DU CHARBON SONT MELANGES DANS UNE CUVE 10 POUR FORMER UNE SUSPENSION POMPEE PAR UNE POMPE 11 DANS UN CONDUIT 12, AFIN D'ALLER DANS UNE TOUR 13. DU GAZ DE SYNTHESE PROVENANT D'UN CONDUIT 30 EST ENVOYE SIMULTANEMENT DANS LA TOUR 13 PAR UN CONDUIT 12. ON SOUTIRE DU SOMMET DE LA TOUR, PAR UN CONDUIT 14 UN MELANGE GAZ-LIQUIDE QUE L'ON ENVOIE DANS LE SEPARATEUR 15 A CHAUD OU L'EFFLUENT EST SUBDIVISE EN UN COURANT 18 GAZEUX ET EN UN COURANT 16 LIQUIDE. INDUSTRIES PETROCHIMIQUES.
Patent FR-2484844-A1 (FR)
Title: Dispositif pour des ceintures de securite montees dans des vehicules
Inventor: SYLVEN HANS
IPC: B60R22/00
Filed: 1981-06-18
Abstract: L'INVENTION CONCERNE UN DISPOSITIF POUR DES CEINTURES DE SECURITE MONTEES DANS DES VEHICULES, LEQUEL COMPREND UNE CEINTURE DONT UNE EXTREMITE EST CONNECTEE A UN POINT D'ANCRAGE INFERIEUR 1 ET UNE AUTRE EXTREMITE S'ETEND A PARTIR D'UN POINT D'ANCRAGE SUPERIEUR 2 SITUE AU VOISINAGE DE LA PARTIE SUPERIEURE DU SIEGE DU VEHICULE, TEL QU'UNE BOUCLE DE GUIDAGE, CETTE SECONDE EXTREMITE ETANT DISPOSEE DE MANIERE A ETRE TIREE AUTOMATIQUEMENT PAR UN ENROULEUR LORSQUE LA CEINTURE EST LIBEREE. CE DISPOSITIF EST CARACTERISE EN CE QU'IL COMPREND UN ARRET QUI EST DISPOSE DE MANIERE A INTERROMPRE LA TRACTION EXERCEE SUR LA CEINTURE DE SECURITE 7 UNE FOIS QUE CETTE DERNIERE A ETE DETACHEE ET CE DANS UNE POSITION TELLE QU'UNE EXTREMITE 11 DE LA CEINTURE SE TROUVANT AU POINT D'ANCRAGE INFERIEUR 1 SOIT LIBEREE DE LA FORCE DE TRACTION EXERCEE PAR L'ENROULEUR DANS LE BUT DE PERMETTRE A LA CEINTURE D'EFFECTUER LE MOUVEMENT PRECITE A PARTIR DE LA POSITION DE FONCTIONNEMENT JUSQU'A LA POSITION SITUEE A L'ECART SOUS L'EFFET D'UNE FORCE AUTRE QUE FORCE DE TRACTION, PAR EXEMPLE CELLE DUE A LA GRAVITE.
Patent FR-2510323-A1 (FR)
Title: Control circuit for single-phase variable amplitude oscillator - uses long tailed pair differential amplifier to regulate switching of push=pull transistor pair in DC=AC inverter
Inventor: GEOFFROY JEAN-CLAUDE
IPC: H02M7/538
Filed: 1981-07-24
Abstract: The circuit is intended for an oscillator supplied from a DC source and using a push-pull oscillator, and includes a differential amplifier (16) controlled by an oscillator (10) and supplied from a current source (18). An astable circuit (15) is inserted between the differential amplifier (16) and the Q,Q bar inputs of the push pull circuit (12) so that variations in the supply voltage (2) do not affect the oscillator output voltage. The differential amplifier (16) comprises two transistors (T1A, T1B) connected in parallel between the astable crcut and the current generator (18) in a long tailed pair configuration with the current generator (18) in the tal. The emitter circuit of the differential pair (16) incorporates a potentiometer (P1) to adjust the symmetry of the output wave.
Patent FR-2510869-A1 (FR)
Title: Display box for fishing line casts - uses floor board with pad for embedding hooks whilst interlocking strips locate lines
IPC: A01K97/06
Filed: 1981-08-06
Abstract: The display case contains fishing line casts (28) and incorporates a mounting board (10) with an anchorage pad (16a) and a bristled strip (18a) on one (10a) or both of its major faces. The strip locates the cast lines (32) whilst the hooks (30) are embedded in the pad. One or both of the major faces may comprise the floor of a rectangular box with a transparent lid (14a). The strip may be fixed to the board in part only and the remainder may fold into the box to allow the lid to be closed, used in association with a cover strip (20a) with hooked fasteners by which the lines are secured. The pad may be secured by an edge hinge (A) and may provide a hook-retaining surface (24) normal to the lines.
Patent FR-2490499-A1 (FR)
Title: Ski nautique, son procede de fabrication et procede de fabrication d'une structure remplie de mousse
Inventor: WEINHAUS HAROLD ROBERT
IPC: A63C5/00
Filed: 1981-08-07
Abstract: L'INVENTION CONCERNE UN SKI NAUTIQUE ET SON PROCEDE DE FABRICATION. CE SKI COMPORTE DEUX COQUES SUPERIEURES 26 ET INFERIEURES 28 ASSEMBLEES ENTRE ELLES AU MOYEN DE REBORDS 32, 34 ENTRE LESQUELS UN ADHESIF EST INTRODUIT AFIN D'ASSURER LA FIXATION DES DEUX COQUES 26, 28 L'UNE A L'AUTRE. UNE RESINE POUVANT FORMER UNE MOUSSE PEUT ETRE INTRODUITE DANS LA CAVITE 30 FORMEE ENTRE LES COQUES 26, 28. DOMAINE D'APPLICATION: SKIS NAUTIQUES.
Patent FR-2511804-A1 (FR)
Title: Powdered material for electric component prodn. - is composite of conductive material on electrically inert support
Inventor: VAL CHRISTIAN
IPC: H01C17/065
Filed: 1981-08-21
Abstract: In the material each grain of powder has a composite structure formed by a core of electrically inert support material covered by a skin of electrically active material so that only the skin takes part in electric conduction between the grains. Pref. skin materials are noble metals e.g. Au, Ag, Pt and Pd, alone or as an alloy, non-noble metal conductors e.g. Al, Cu and Ni, metal oxides with non-linear resistivities e.g. Nb2O5 and VO2 and the borides, nitrides and oxides of metals with linear resistivities e.g. Ru, Ir, Bi, Tl and Pb. Pref. core materials are dielectrics e.g. Al2O3 and TiO3Ba, thermally conducting oxides e.g. BeO, ZrO2, Al2O3 and thermally insulating oxides e.g. silicates and glasses. Used in a screen printing paste or as a powder for fusion used in the prodn. of capacitors, resistances with positive or negative temp. coeffts., resistances which vary with voltage and conducting or resistive tracks in the substrate. Great cost savings can be made. For resistive pastes, the coefft. of dilation can be altered by suitable choice of core material.
Patent FR-2512172-A1 (FR)
Title: Double wall storage tank for low temp. liq. - has spill condition venting system preventing gas build up between walls
Inventor: PATIL ULHAS S
IPC: F17C13/12
Filed: 1981-08-25
Abstract: Double wall storage tank for low temp. liq. esp. cryogenic liq., has the annular space between the walls filled with granular insulating material and a spill condition venting system for venting vapours of liq. spilled into the annular space. An overflow pipe conducts liq. from an overflow level inside the tank to the bottom of the annular space. A corrugated blanket, pref. of glass fibre, disposed in the annular space defines ducts extending the entire height of the tank for directing vapour generated by the spilled liq. back into the tank. An annular filter disposed horizontally within the annular space filters the vapour prior to its return to the tank. The spill conditioning venting system prevents gas build up in the annular space in the event of a spill of liq.
Patent FR-2489540-A1 (FR)
Title: Monture pour diapositives
IPC: G03B21/64
Filed: 1981-09-04
Abstract: DANS UNE MONTURE POUR DIAPOSITIVE EN MATIERE PLASTIQUE, UNE PAIRE D'ORGANES DE COUVERTURE 10 EST ARTICULEE A DES BORDS EXTERIEURS OPPOSES D'UNE PLAQUE DE BASE 1 SENSIBLEMENT CARREE PERCEE D'UNE OUVERTURE 2 POUR RENDRE VISIBLE LA DIAPOSITIVE. LES ORGANES 10 FONT CORPS AVEC LA PLAQUE 1 ET SONT TOUS DEUX CAPABLES D'ETRE PLIES SUR UN COTE DE LA BASE CONTRE LEQUEL DES PARTIES MARGINALES DE LA DIAPOSITIVE PRENNENT APPUI. DANS LEUR POSITION PLIEE, LES ORGANES 10, DE FORME GENERALE RECTANGULAIRE, RECOUVRENT DES BORDS OPPOSES DE LA DIAPOSITIVE MAIS LAISSENT DES PARTIES CONSIDERABLES DE LA PLAQUE DE BASE A L'EXTERIEUR DE L'OUVERTURE 2, ET CES PARTIES SONT SURELEVEES EN 8 DE FACON A SE TROUVER SENSIBLEMENT AU NIVEAU DES FACES SUPERIEURES DES ORGANES DE COUVERTURE PLIES, CE QUI RIGIDIFIE LA MONTURE. A L'ETAT PLIES, LES ORGANES 10 SONT RETENUS PAR DES GOUJONS 11 QUI FONT SAILLIE DEPUIS LA PLAQUE DE BASE ET PENETRENT DANS DES OUVERTURES 12 MENAGEES DANS LES ORGANES 10, ET ILS SERVENT AUSSI A POSITIONNER LA DIAPOSITIVE.
Patent FR-2513779-A1 (FR)
Inventor: MIGNOT JACQUES
IPC: G06T7/00
Filed: 1981-09-25
Abstract: Automatic device for statistical analysis of an object (1), comprising (a) a microscope (4) for projecting the image of an elementary part of the object (1) onto a photoelectric receiver (5), the object (1) and the receiver (5) being displaceable relative to one another, continuously, at constant speed, so that the images of different elementary parts of the object (1) are projected continuously onto the receiver (5); (b) an electronic circuit (7) for continuously digitizing each of the images, followed by a single computer (8) for continuously storing and then for continuously processing these images, making it possible to characterize the latter by a limited number of parameters; and (c) a microprocessor (10) for storage of these parameters and then for statistical calculations by means of all the stored parameters for an average characterization of the object (1) under study.
Patent FR-2514185-A1 (FR)
Title: Tete d'enregistrement et de lecture en ceramique ferromagnetique, notamment en ferrite
Inventor: KODJABASHEV PETKO VENELINOV
IPC: G11B5/10
Filed: 1981-10-06
Abstract: LA TETE D'ENREGISTREMENT ET DE LECTURE SELON L'INVENTION COMPREND UN CORPS 7 FERME A SA PARTIE INFERIEURE PAR UN COUVERCLE 8 REALISE EN UNE FERRITE MAGNETIQUEMENT TENDRE AYANT UN COEFFICIENT DE DILATATION LINEAIRE EGAL A CELUI DE L'ENSEMBLE DES NOYAUX MAGNETIQUES 1, 3, 5, DE LA TETE. LE COUVERCLE 8 EST FIXE AU CORPS 7 PAR UNE RESINE CONDUCTRICE 9 TANDIS QUE L'ENSEMBLE DES NOYAUX MAGNETIQUES EST FIXE DANS UNE OUVERTURE REALISEE A LA PARTIE SUPERIEURE DU CORPS PAR UNE RESINE VITREUSE A BASSE TEMPERATURE. LES CONDUCTEURS DES ENROULEMENTS DES NOYAUX MAGNETIQUES SORTENT PAR LE COUVERCLE 8 POUR ABOUTIR A UNE PLAQUETTE DE CHLORURE DE POLYVINYLE 11 FIXEE AU COUVERCLE 8, LA OU SORT LA CONNEXION DE MASSE DES NOYAUX MAGNETIQUES. LA SURFACE INTERIEURE DU CORPS 7 EST COUVERTE D'UNE COUCHE CONDUCTRICE 12 CONNECTEE A LA MASSE PAR LA PLAQUETTE 11. CETTE TETE EST UTILISABLE DANS LE DOMAINE DES ORDINATEURS.
Patent FR-2514977-A1 (FR)
Title: Infrared image sensor for video camera - includes automatic focussing system overcoming strong temp. dependence of focal position
Inventor: BECK JEAN LOUIS
IPC: H04N5/33
Filed: 1981-10-20
Abstract: The camera includes a focussing objective lens bringing the IR to a focus on a detector which is refrigerated. An automatic focussing system maintains the photodetecting surface in the focal plane of the lens, and a shutter is provided for interrupting radiation entering the lens. A displacement mechanism including a motor moves the photodetecting surface relative to the objective lens within specified limits. An output signal analysing circuit detects the image signal produced in conjunction with a position signal derived from the displacement mechanism, in order to determine when the signal is a min., so that this position may be reproduced by further adjustment. The system is intended to reduce the strong temp. dependence of the focussing of such systems which otherwise rapidly degrades the quality of the image.
Patent FR-2516092-A1 (FR)
Title: Rubber compsns. with resistance to thermal ageing - comprises polymer blended with antioxidant mixt. of di:phenyl amine deriv., and/or phenol deriv. and poly:alkylene ether glycol
Inventor: KOTANI TEIZO
IPC: C08K5/00
Filed: 1981-11-10
Abstract: (A) Elastic (co)polymer is blended with an antioxidant mixt. comprising (B) diphenyl amine deriv. and/or (C) phenol deriv. opt. coupled chemically with elastic (co)polymer as portions of the molecular chains and (D) polyalkylene ether glycol having ave. mole wt. of 100-5000 to provide a compsn. having high resistance against thermal ageing. (A) is typically polybutadiene, polychloroprene, polyisoprene, butadiene/acrylonitrile copolymer, butadiene/styrene copolymer, isoprene/acrylonitrile copolymer, isoprene/butadiene/ acrylintrile terpolymer. (B) is typically diphenyl amine, p-amino- diphenyl amine, N-isopropylamino-diphenyl amine, N-4-anilinophenyl acrylamide or N-4-anilinophenol benzoic acid. (C) is typically phenol, 2,6-di-t-butyl phenol or 2,6-di-t-butyl cresol. The coupled (B) or (C) has typically a repeating unit of formula (I) or (II). The combined use of (B) and/or (C) and (D) improves synergetical resistance against ageing at higher temps.
Patent FR-2518612-A1 (FR)
IPC: E04G23/02
Filed: 1981-12-22
Abstract: 1. Process for altering a roof truss, the said truss (1) being situated between two gable walls (20, 21) - possibly pointed - and comprising a series of gable trusses (2) extending from one front wall (3) to another (4), being disposed at a short distance ("D") from each other between the said front walls so as to form the necessary supports for the roof, and consisting principally of a horizontal beam (5) called a "tie-beam" and two inclined wooden members (6, 7) called "principal rafters", which, in non-convertable rooves, are connected to each other by means of triangular elements such as braces (8, 9, 10, 11) supporting the principal rafters so that the latter can resist the bending stress to which they are subject on account of the weight of the roof, this alteration process being characterised in that, before the triangular elements of each principal rafter are removed, - a vertical slide (12) is firstly secured between the principal rafter (6, 7) and the tie-beam (5) of at least a plurality of gable trusses (2), - beams (15) are simultaneously introduced into the roof and engaged in the slides (12), the said beams having first been divided into a plurality of sections (16, 17, 18 and 19) and the ends of the beam (15) are secured in the gable walls (20, 21) respectively, the sections (16, 17, 18, 19) of the beam being joined by joining means (22, 23 and 24), under each of which is secured a strut (25, 26 or 27), - the base of each of the struts (25, 26 or 27) is then secured by one of the ends of two beam ties (31 and 32) the other ends of which are connected, at least indirectly, to those of the beam sections situated on both sides of the strut in question, - finally, the beam ties are brought into action and, by acting on the strut with which they form a triangle, support the beam, which in turn at least indirectly supports the principal rafters and the roof, which thus allows for the removal of the original triangle of the gable trusses (2) and then for the lining of the roof.
Patent FR-2498149-A1 (FR)
Inventor: BASTIAN RUDI
IPC: B62D21/14
Filed: 1981-12-29
Abstract: In a mounting method for installing vehicle superstructures on vehicle frames (2) of differing widths (c), initially the vehicle superstructure is connected to a mounting frame (141) of constant width (a). If the specific vehicle frame (2) is known, an auxiliary frame (142) which corresponds to the latter is welded onto the mounting frame (141) and the superstructure unit which is completed in this way is bolted as a whole to the vehicle frame (2). The preferred field of application is construction of concrete mixer trucks.
Patent FR-2519391-A1 (FR)
Title: Section for making flat joints between panels - has cavity to allow mounting of movable shelves
Inventor: BEZAULT JEAN-FRANCOIS
IPC: A47B57/26
Filed: 1982-01-06
Abstract: The panel connector has a straight aluminium or plastic section to make a flat, vertical joint between two grooved, wooden panels and allow mounting of movable shelves. The section has two equal and opposite omega shaped elements, joined by an internal, reinforced plate (3) to make two T shaped cavities (5) open at the base and separated at the head by the plate. A bolt head slides into the cavity, and the shelf (25) is mounted onto the threaded shank (22), secured by a nut. The section is glued to correspondingly shaped grooves in the panels,and the joint is reinforced by serrated wings (10,11) on each side, which fit into slots in the panels.
Patent FR-2498601-A1 (FR)
Title: Nouveaux chromannes substitues utiles notamment comme anti-inflammatoires
Inventor: SUNDEEN JOSEPH E
IPC: A61P9/12
Filed: 1982-01-29
Abstract: L'INVENTION CONCERNE DE NOUVEAUX CHROMANNES SUBSTITUES ET LEURS APPLICATIONS THERAPEUTIQUES. LES COMPOSES DE L'INVENTION REPONDENT A LA FORMULE GENERALE: (CF DESSIN DANS BOPI) DANS LAQUELLE R EST L'HYDROGENE OU UN RESTE ALKYLE INFERIEUR, PHENYLE SUBSTITUE, PHENYLE, PHENYLALKYLE INFERIEUR, (PHENYL SUBSTITUE)-ALKYLE INFERIEUR OU (ALKYL INFERIEUR) AMINOALKYLE INFERIEUR; R EST UN GROUPE PIPERIDINYLALKYLE INFERIEUR, N-(ALKYL INFERIEUR)-PIPERIDINYLE, PYRIDINYLE, N-(ALKYL INFERIEUR) PIPERIDINYLALKYLE INFERIEUR, PIPERIDINYLE, N-(ALKYL INFERIEUR) TETRAHYDRO-1,2,5,6-PYRIDINYLE OU MONO- OU BIS-(ALKYL INFERIEUR) AMINOALKYLE INFERIEUR; R, R, R ET R SONT CHOISIS CHACUN INDEPENDAMMENT PARMI L'HYDROGENE, LES HALOGENES ET LES GROUPES HYDROXY, AMINO, -O-ACYLE, -O-ALKYLE INFERIEUR, -N-ACYLE, ALKYLE INFERIEUR OU ALKYLE INFERIEUR HALOGENE. APPLICATIONS: ANTI-INFLAMMATOIRES ET ANTI-ALLERGIQUES.
Patent FR-2520770-A1 (FR)
Title: Drying process for paper-making web - having circulating flexible metallic band heated by radiant panels on underside
IPC: D21F5/00
Filed: 1982-02-03
Abstract: In a dry process for a web formed at the wet end of a papermaking machine, the web is supported on an endless, flexible metallic band whose movement is essentially planar. The underside of the band is heated, pref. by infrared radiation, to a temp. of 140-200 deg.C for a sufficient length to ensure complete drying of the web, and the web is held against the upper surface of the band by a synchronously-moving drying felt. An exhaust hood above the band removes the water vapour expelled from the web. The process requires a less expensive machine than conventional methods using steam-heated cylinders, etc., makes more efficient use of the input energy, and enables the drying temp. to be accurately controlled.
Patent FR-2521208-A1 (FR)
Title: Coupling for two=stage ladder - has pivot to allow stages to undergo angular displacement to form triangular structure
Inventor: BIANCHI JEAN
IPC: E06C7/44
Filed: 1982-02-11
Abstract: The coupling allows a two-stage ladder to support itself on level ground or a staircase. It comprises clamps (2) carrying fixed pivotal axes (3), which are secured to each upright of the smaller stage by releasable clips (7). The uprights of the larger stage receive brackets (B) containing recesses (C) into which the pivotal axes (3) locate. An arm (A) extends from the bracket (B) and has a folded end (D) which bears onto the upright of the smaller stage to limit angular displacement between the two stages. Each clamp carries an internal projection, which engages into the open end of a rung (E), to hold the clamp in position.
Patent FR-2504440-A1 (FR)
IPC: B25D17/12
Filed: 1982-04-26
Abstract: L'invention concerne un outil de percussion portatif pneumatique. L'outil comprend une poignée liée à un corps 5 pourvu d'un passage latéral d'entrée et d'un siège de soupape 6; dans le corps un cylindre de travail 11 est suspendu à la poignée par l'intermédiaire d'un ressort 22. Le cylindre est pourvu de trous d'admission 15 et d'échappement 32, d'un système de distribution 16 et d'un piston de percussion 17 coopérant avec un outil de travail 27; à l'intérieur du corps est disposée une pièce intercalaire 7 dans laquelle le cylindre de travail est guidé à l'aide de deux collerettes 10a, 10b délimitant, en coopération avec la paroi intérieure de la pièce intercalaire un évidement annulaire 14 dans lequel débouche un passage d'entrée qui est simultanément relié à une cavité de la poignée par l'intermédiaire de passages 6a, la traversant le siège de soupape et la poignée.
Patent FR-2506374-A1 (FR)
Inventor: BRACKMANN HORST
IPC: E05B17/04
Filed: 1982-05-04
Abstract: The invention relates to a locking device for motor-vehicle door fastenings, with a lock cylinder (1), a cylinder housing (2) and a driver (3). The lock cylinder (1) has a series of tumbler elements (4), and the cylinder housing (2) has at least one corresponding rest-position gating (5). By means of an inserted key, the lock cylinder (1) can be rotated in the cylinder housing (2) out of the position of rest through a locking angle into a locking position or into an unlocking position. Moreover, as a result of the rotation of the lock cylinder (1), the driver (3) can be moved out of the unlocking position into the locking position, and vice versa, with the interposition of a freewheel in the form of a key turn-back play (S) (for the position of rest of the cylinder roller (8), in which the key can be inserted or removed). A door-fastening securing lever (6) can be connected indirectly or directly to the driver (3). Between the lock cylinder (1) and the driver (3) is arranged an anti-theft protection sleeve (7) connected to the driver (3). The anti-theft protection sleeve (7) engages over the cylinder roller (8) and at least one rear tumbler element (4) of the lock cylinder (1). The said sleeve (7) itself possesses two tumbler gatings offset by the amount of the locking angle, namely at least one anti-theft protection gating (9) and one unlocking gating (10). Moreover, with the interposition of the key turn-back play (S), it can be driven by the lock cylinder (1) between the locking position, now functioning as an anti-theft protection position, and the unlocking position. The arrangement is such that, in the locking position, the anti-theft protection gating (9) of the anti-theft protection sleeve (7) and the rest-position gating (5) of the cylinder housing (2) and, in the unlocking position, the unlocking gating (10) of the anti-theft protection sleeve (7) and the rest-position gating (5) of the cylinder housing (2) are in line and consequently are occupied by the tumbler elements (4) of the lock cylinder (1) when the key is removed. Anti-theft protection is achieved in this way, because the door-fastening securing lever (6) can no longer be actuated when the locking device is in the locked state. Furthermore, the arrangement is such that a person who is inside the vehicle can actuate the door-fastening securing lever (6) when the vehicle is not closed from the outside with anti-theft protection, that is to say when the key has been withdrawn. For this purpose, a further freewheel, namely a securing-lever play (T), is provided between the anti-theft protection sleeve (7) and driver (3).