baber/WOPTO huggingface dataset:
Patent DD-286439-A5 (DD)
Title: Schaltungsanordnung und verfahren zum automatischen austausch von werkzeugen
Inventor: LEHNERT CLAUS-PETER
IPC: G05B19/18
Filed: 1989-07-19
Abstract: Die Erfindung betrifft eine Schaltungsanordnung und ein Verfahren zum automatischen Austausch von Werkzeugen. Die Erfindung bezieht sich auf numerisch gesteuerte Werkzeugmaschinen und ist zweckmaeszig anwendbar in Bearbeitungszentren und Fertigungszellen, die mit automatischen Werkzeugwechseleinrichtungen und Werkzeugmagazinen versehen sind. Wesentliche Merkmale der Erfindung sind, dasz die erste, Werkzeuge steuernde Steuereinheit (SE 1) mit einer zweiten Steuereinheit (SE 2) verbunden ist, die eine Werkzeugliste im Werkzeuglistenspeicher (WZL) mit frei verfuegbaren Parameterwerten, Stromgrenzwerten, Magazinplatznummern im aktiven Magazin und in Reservemagazinen und den Werkzeugstatus fuer jedes zum Einsatz kommende Werkzeug und ein aktives und Reservemagazine verwaltet. Durch die erste Steuereinheit (SE 1) im Prozesz gemessene Grenzwerte fuer ein Werkzeug, werden mit den von der zweiten Steuereinheit (SE 2) aus der Werkzeugliste (WZL) angeforderten Grenzdaten verglichen, und entsprechende AEnderungen in die Werkzeugliste eingetragen. Eine von der ersten Steuereinheit (SE 1) steuerbare Weiche (W 1) ist ueber vier Ausgaenge mit der zweiten Steuereinheit (SE 2) und einer, ein erstes Fehlersignal fuehrenden und von der zweiten Steuereinheit (SE 2) beaufschlagten Auswerteeinheit (AW) verbunden. Die erste Steuereinheit (SE 1) ist ueber eine zweite Weiche (WZ) mit dem Werkzeuglistenspeicher (WZL) verbunden. Fig. 1{Werkzeugwechseleinrichtung; Werkzeugmagazin; Werkzeugliste; Magazinplatznummer; Werkzeugstatus; Stromgrenzwert; automatischer Werkzeugaustausch}
Patent DD-287684-A5 (DD)
Title: Verbundwerkstoff
Inventor: MASTHOFF ROLF
IPC: E04C2/06
Filed: 1989-09-08
Abstract: Die Erfindung betrifft Verbundwerkstoffe, die im Bauwesen fuer die verschiedensten Einsatzzwecke, insbesondere aber fuer Bauplatten eingesetzt bzw. verwendet werden. Erfindungsgemaesz werden in einem silikatischen Bindebaustoff bis zu 20% Masseanteile anorganische Fasern zugegeben, wobei die anorganischen Fasern mit einem UEberzug aus einem mit Oxiden und/oder Salzen zweiwertiger Metalle und/oder Aminen katalysierten PF-Resols versehen sind. Der UEberzug betraegt bis zu 10% Masseanteile bezogen auf die eingesetzten Fasern.{Verbundwerkstoff; Beton; Bindebaustoff; Zement; Gips; anorganische Fasern; Glasfasern; Mineralfasern; Schlackenfasern; polymere Schutzschicht; PF-Harz}
Patent DD-285980-A5 (DD)
Title: Verfahren zur herstellung von mevalonolactonen vom thienopyridin-typ
Inventor: SUZUKI MIKIO
IPC: C07D/
Filed: 1989-11-01
Abstract: Die Erfindung betrifft Verfahren zur Herstellung von Mevalonolactonen vom Thienopyridin-Typ der Formel * in der die Substituenten R1 bis R5, Y und Z die in der Beschreibung angegebene Bedeutung haben. Die erfindungsgemaesz hergestellten Verbindungen der Formel (I) werden als Pharmazeutika, insbesondere als anti-hyolipoproteinaemische und/oder anti-atherosklerotische Mittel, verwendet. Formel (I){Mevalonolactone-Herstellung; Pharmazeutika; anti-hypolipoproteinaemisch; anti-atherosklerotisch}
Patent DD-293556-A5 (DD)
Title: Untergestell fuer schienengebundene gueterwagen, insbesondere fuer kesselwagen und geschlossene schuettgutwagen
Inventor: GIESE KLAUS-DIETER
IPC: B61D5/06
Filed: 1990-03-23
Abstract: Um bei einem Gueterwagen die Verbindungsstellen zwischen Aufbau (15) und Untergestell (1) bei Pufferstoeszen auf der Seite des Pufferstoszes zu entlasten und die auftretenden Pufferkraefte zu verringern, ist der Aufbau (15) des Gueterwagens an seinen Enden (A, B) in Richtung auf die Quermittelebene des Untergestells (1) festgelegt, in Richtung auf die Enden (A, B) des Untergestells (1) jedoch gegen dieses laengsverschieblich gehalten, so dasz Kraefte aus einem Pufferstosz ueber das Untergestell (1) in das dem Pufferstosz abgewandte Ende des Aufbaus (15) eingeleitet werden. Weiter ist das Untergestell (1) in Laengsrichtung reversibel nachgiebig ausgebildet, wobei eine Energieaufnahme und ein nennenswerter Abbau der Pufferstoszkraft durch gezielte reversible Biegung der Traegerstruktur oder von Teilen der Traegerstruktur der Kopfsektionen (2) und/oder der Mittelsektion (3) des Untergestells (1) erfolgt. Fig. 2{Gueterwagen; Verbindungsstelle; Aufbau; Untergestell; Pufferstoesze; Pufferkraefte; Quermittelebene; reversible Biegung der Traegerstruktur; Kopfsektion; Mittelsektion}
Patent DD-298341-A5 (DD)
Inventor: SCHUMACHER HANS
IPC: A01N47/30
Filed: 1990-06-01
Abstract: Combinations comprising 3-(4,6-dimethoxy-2-pyrimidinyl)-1-[(N- methyl-N-methylsulphonyl)aminosulphonyl]urea (I) and a phenylurea (II) are valuable herbicides having synergistic properties.
Patent DD-295235-A5 (DD)
Title: Verfahren und anordnung zur faseroptischen messung von kraeften
Inventor: MOLLENHAUER OLAF
IPC: G01B11/03
Filed: 1990-06-18
Abstract: Verfahren und Anordnung zur Messung technisch-physikalischer Groeszen, insbesondere von Kraeften, mittels faseroptischen Sensors durch Auslenkung eines auf die Stirnflaechen von mindestens zwei Lichtwellenleiter gerichtetes Strahlungsbuendels. Erzeugung des Strahlungsbuendels durch einen senderseitigen Lichtwellenleiter, der ueber ein elastisches Element mit den empfaengerseitigen Lichtwellenleitern verbunden ist. Art der zu messenden technisch-physikalischen Groesze, Empfindlichkeit und Meszbereich ist durch die Gestaltung des elastischen Elementes, der Geometrie und Anordnung der Stirnflaechen der Empfaengerfasern sowie durch Berechnungsmethoden bestimmt. Fig. 1{Verfahren; Anordnung; Mesztechnik; faseroptischer Sensor; Kraft-, Momenten-, Laengen-, Winkelmessung; Strahlauslenkung; Lichtwellenleiter}
Patent DD-297666-A5 (DD)
Title: Verfahren zur entfaerbung von zuckersaft
Inventor: BOUSSELY JEAN-FRANCOIS
IPC: C13B30/02
Filed: 1990-09-17
Abstract: In einem Verfahren zur Gewinnung von Zucker aus Pflanzen wie Zuckerrueben oder Zuckerrohr wird der Duennsaft mit Wasserstoffperoxid versetzt, der p H-Wert auf etwa 8 bis 9,5 eingestellt und durch Verdampfung des Wassers zu einem Saft konzentriert, aus dem der Zucker durch Kristallisation abtrennbar ist.
Patent BE-1001603-A6 (BE)
Title: Inrichting voor het snijden van behangselpapier en dergelijke.
IPC: B26D1/10
Filed: 1988-04-19
Granted: 1989-12-12
Abstract: ...daardoor gekenmerkt dat zij hoogdzakelijk bestaat uit een snijplank (1); een langs de snijplank (1) aangebrachte rolhouder (2); minstens één evenwijdig boven de snijplank (1), alsook evenwijdig t.o.v. de rolhouder (2) gemonteerde geleiding (3); en een langs de geleiding (3) verplaatsbare wagen (4) die voorzien is van een meshouder (5), zodanig dat een erin aangebracht mes met het bovenvlak van de snijplank (1) kan samenwerken.
Patent BE-1002171-A6 (BE)
Title: Improvements to packaging materials
Inventor: FAULKNER PETER
IPC: B65D81/09
Filed: 1990-05-10
Granted: 1990-09-11
Abstract: Method to produce a plastic bubble sheet (2) used as a packaging material.A flat upper plastic film (10) is conveyed from an upper film storage reel(12) onto an upper film heating roller (19) where it is heated to theplastic state, and then conveyed to a drum (5). Pockets are formed in theupper film (10) on the drum (5). A flat plastic base film (11) is conveyedfrom a base film storage reel (13) onto heating rollers (20) and then to thedrum (5). On the drum (5), the base film (11) is applied to the upper film(10) and is welded thermally onto the upper film (10) so as to seal thepockets forming the bubble sheet (2). The T of the heating rollers (19, 20)are set in predetermined T limits by circulating oil through the heatingrollers (19, 20). The T of the oil is regulated by passing the oil throughan oil heater (23) and an oil cooler (26) and by selectively running the oilheater (23) and/or cooler (26).<IMAGE>
Patent BE-1004673-A6 (BE)
Title: Procedure for blocking outlet in firing cap - involves applying die in line with axis of outlet and pushing paper to outlet before cutting it
IPC: F42C19/10
Filed: 1991-03-11
Granted: 1993-01-12
Abstract: The procedure for blocking an outlet (11) in the firing cap of a firearm cartridge consists of covering the end of the firing cap chamber (10) with a layer of paper, to which a pressure is then applied by a die (13) in line with the axis of the outlet. The pressure of the die pushes the paper into the outlet, cutting it against the edge of the outlet and forming a concave disc (14) inside it which is left in place to block the outlet when the die is withdrawn.
Patent BE-1006802-A6 (BE)
Title: Sales system with automatic selection of various articles
IPC: G07F9/02
Filed: 1993-03-03
Granted: 1994-12-13
Abstract: Sales and invoicing system for various articles, characterised in thatvisual selection means are provided, listing the articles with correspondingidentification numbers and a keyboard, combined with a sealed storageapparatus. When the item selected is taken from the apparatus via an accessdoor, the corresponding sum is debited from the customer's account. Means areprovided for using a television to view the information and to connect thesales apparatus to the hotel management system.<IMAGE>
Patent BE-1010727-A6 (BE)
Title: Scaffolding, along with a trestle and aids for construction such a framework
IPC: E04G1/32
Filed: 1996-10-31
Granted: 1998-12-01
Abstract: A scaffold with the distinguishing feature that it has one or more upright components (2) that are made up of trestles (3) stacked one on top of another.<IMAGE>
Patent BE-1011247-A6 (BE)
Title: Water sports location
IPC: E02B5/06
Filed: 1997-07-01
Granted: 1999-06-01
Abstract: A water sports location comprising a building (1) and a body of water (4) within it, intended for playing indoor water sports, with the distinguishing features that it has a number of jet-skis (5), and that a track for these jet-skis to follow has been laid out in the body of water (4).<IMAGE>
Patent BE-1011992-A6 (BE)
Title: Gedeeltelijk gebakken brood.
Inventor: ABRAHAM BERND
IPC: A21D8/06
Filed: 1999-04-23
Granted: 2000-03-07
Abstract: Onder omgevingscondities stabiel, gedeeltelijk gebakken brooddeeg zoals verkrijgbaar met een werkwijze die het afkoelen en verpakken in een aseptische omgeving(en) omvat, welk brooddeeg meel, water en een gisting-veroorzakend middel omvat als ook 0,1-3 %, betrokken op meelgewicht, van een preserveermiddel en 0-5 gew.- %, van een of meer middelen tegen oud worden, geproduceerd door een bacterie omvat, terwijl het deeg gedeeltelijk gebakken wordt, dusdanig dat de kruimel van elk stuk volledig gebakken wordt, maar de korstvorming en kleur onvolledig zijn, dan een onder omgevingscondities stabiel gedeelteijk gebakken brooddeeg, vervaardigd zonder afkoeling tot omgevingstemperatuur en verpakking in aseptische omgevingen, bevat.
Patent ES-2003120-A6 (ES)
Title: Pneumatic servo motor for assisted braking.
Inventor: CARRE JEAN-JACQUES
IPC: B60T13/52
Filed: 1986-09-30
Abstract: The stop member (23), which forms a bearing surface (33) cooperating in abutment with an abutting member (22) carried by the actuating rod (13) of the booster so as to determine the operational dead travel of the booster, has a deformable structure (30) capable of yielding elastically when a pulling force (F) exerted axially by the abutting member (22) on the stop member exceeds a predetermined value. The deformable structure advantageously consists of at least one arm (30) integral with a mounting sleeve (28), fixed by crimping (37) onto the rear central duct (9) of the rear shell (2) of the booster housing. The abutting member (22) is secured, in a given position, to the coupling fork (15) of the actuating rod (13).
Patent ES-2007055-A6 (ES)
Title: Washing machine shock absorber
Inventor: LOPEZ MORER ANDRES
IPC: D06F37/20
Filed: 1987-06-15
Abstract: Shock absorber has anchorages moulded in plastics material comprising fixing portion, a wall portion with a certain elasticity to absorb non-axial vibrations and displace-ments and a transverse cylindrical portion for anchorage. The device has frictor with two rings and the assembly is held in position by a notch and the flange of the tubular element of the absorber.
Patent ES-2005317-A6 (ES)
Title: Heat exchangers
Inventor: MALCOLM KNAPMAN PETER
IPC: F28F3/04
Filed: 1987-09-11
Abstract: A rotary regenerative heat exchanger is described including superimposed profiled plates having open S-shaped cross-section ridges disposed on each side of the plate. The resistance to flow of the fluid through the channels at the cold end of the heat exchanger plate stack is significantly less than at the hot end and this can be achieved by making the cross-section of the channels larger, e.g. by making the height and/or pitch of the ridges greater and/or by reducing the angle of inclination of the ridges at the cold end of the stack.
Patent ES-2006104-A6 (ES)
Title: Finishing of marble and stone surfaces
IPC: C04B41/51
Filed: 1988-03-09
Abstract: Process comprises covering the surface with a hardenable resin in liq. or semi-liq. form mixed with particles or powders pref. metallic, which differ in colour from the surface treated. This fills the cavities in the surface, which is then polished to remove the surface coating, leaving the cavities filled.
Patent ES-2011344-A6 (ES)
Title: Improvements to burners for solid fuels
IPC: B02C23/02
Filed: 1988-06-17
Abstract: The improvements comprise a receiving hopper with straight walls which tips the material onto a linear device for introducing fuel into the grinding means. At the exit from the hopper there are break-up means consisting of a shaft with studs, and at the top a magnetic plate located between the exit from the hopper and the entry to the mill. The mill has a rotor with fixed hammers which grind on break-up devices incorporated by the screen. The mill has closure wheels which, in combination with a hinge, facilitate its opening. The ground fuel is conveyed to a distributor fan provided with metering nozzles. Between the set of mechanisms of the burner and the dome of the furnace there are shock-absorbing means.
Patent ES-2020013-A6 (ES)
Title: Rotating triboelectric generator
Inventor: LORENTE PARAMO GABRIEL
IPC: H02N1/04
Filed: 1988-10-20
Abstract: Rotating triboelectric generator. It consists of active components generating by triboelectrification electrical charges, positive and negative respectively, in equal quantity, and collector components of said charges provided in at least two in number and appropriate for the transmission of the charges to some external terminals. The active components comprise one or more pairs of solid bodies of mutually differentiated materials, such as nylon and teflon, and the collector components are solid electrically conducting bodies. The external surfaces in rotating contact with both groups of components may be flat or curved and have a smooth or channelled finish by way of gearing or rack. The apparatus of the invention is useful as an electrostatic generator for teaching, research and industry and as an essential element of fixed or portable lighters for boilers, cookers and gas burners.
Patent ES-2010441-A6 (ES)
Title: Thermal shock probe utilisation for chemical heat pump
Inventor: OMS JEAN-LUC
IPC: G05D23/22
Filed: 1989-03-09
Abstract: The probe (6) has a magnesia-packed heating filament within a stainless steel tube to which a thermocouple is bonded with wiring (80,81) to a signal-processing circuit (8). It is energised from a current generator (7) to produce the necessary heat flux into a reaction chamber. - Two chambers (1,2) are linked by a tube (3) and equipped with heat exchangers (4,5) in circuits contg. electrically-operated valves (11,10). A thermal pulse or step is produced by the generator (7), and the response curve of the thermocouple is integrated, or the temp. attained after a given interval detected.
Patent ES-2016053-A6 (ES)
Title: Catalytic system for the hydroconversion of heavy oils
Inventor: RAMIREZ DE AGUDELO MAGDALENA M
IPC: B01J29/06
Filed: 1989-08-14
Abstract: The present invention relates to a process for the hydroconversion of heavy crude oil and an improved regenerable catalyst for use therein. The process broadly comprises (a) introducing into a hydroconversion reaction zone a feedstock of crude oil, hydrogen, from about 10 to about 1000 wppm of an active phase source selected from the group consisting of Group VB metals, Group VIB metals, Group VIIB metals, Group VIIIB metals, Group IA metals, Group IIA metals, and mixtures thereof, and from about 0.1 to about 20.0 wt. % of a refractory carrier material having a surface area in the range of from about 10 to about 700 m2/g, a total pore volume of from about 0.1 to about 2.0 cm3/g, an average pore diameter in the range of from about 20 to about 4,000 ANGSTROM , a particle size diameter in the range of from about 1 to about 1000 mu m and a pore size distribution according to the following: -Pores of radius r ( ANGSTROM ) % Total Pore Volume ->1000 about 0.5-about 30 -1000-300 about 2-about 50 -300-100 about 5-about 60 -100-40 about 5-about 60 -<40 about 5-about 30 - (b) mixing the refractory carrier material with the active phase source, the oil feedstock, and the hydrogen under hydroconversion conditions (c) separating a solid phase from a liquid product and a gas product (d) recovering a regenerable catalyst from the solid phase and (e) recycling the regenerable catalyst into the hydroconversion zone. In a preferred embodiment, the catalyst recovery step comprises washing the separated solid phase containing the used catalyst with a refinery solvent at a temperature in the range of from about 20 DEG to about 150 DEG C., drying the solid phase at a temperature in the range of from about 50 DEG to 200 DEG C., and burning off deposited coke in an oxygen-containing atmosphere at temperatures in the range of about 300 DEG to about 700 DEG C. and pressures in the range of from about 0.5 to about 50 atmospheres to leave a recyclable catalyst material.
Patent ES-2024204-A6 (ES)
Title: Electrical connections of the secondary circuit of an ignition coil, in particular for a motor vehicle internal combustion engine
Inventor: BADAUD ERIC
IPC: H01F38/12
Filed: 1990-04-26
Abstract: Multiple ignition coil, in particular for a motor vehicle internal combustion engine, including in particular at least two separated magnetic assemblies M1, M2, each circuit comprising a primary assembly P, and a secondary assembly S, and means for the electrical connection of each secondary winding 6 to the corresponding high-voltage output 30, which means are arranged so as to effect electrical connection before inserting the magnetic assemblies M1, M2 into the housing 8, characterised in that the electrical connection means consist of a linking plate 28 which is accommodated in a T-groove 26 of a boss 23 made in one piece with and on the outside face of the flanges 20, 21 of the secondary coil former 5.
Patent ES-2024829-A6 (ES)
Title: Improvements to the subject of patent no. 9001540 for "Casing/support for devices for selecting coins or tokens"
Inventor: LORENZO REGIDOR ANGEL
IPC: G07F9/10
Filed: 1990-06-05
Abstract: The improvements consist in one of the side walls of the hollowed-out part 17 of the single-piece body 10, opposite the side of the casing which can be accessed for the insertion of coins, consisting of a plate 16 articulated to screws 23a with fins 23 emerging from the rear major surface of the hollowed-out part, with the interposition of return springs 24 anchored in retention means 30, for the purpose of establishing a side opening 19 for the removal/fitting of a selector device in said hollowed-out part 17. The upper and lower portions of the casing 10 are joined by a strip 25 which delimits one side of the opening 19. The plate 16 has a handle fin and orifices 27 facing other orifices 29 of the opposite wall for respective pivots which immobilize the selector.
Patent FR-2067584-A6 (FR)
Title: Acetal compsns as non-ionic surfactants
IPC: C09K23/00
Filed: 1969-11-07
Granted: 1971-08-20
Abstract: Acetal mixtures are obtained by reacting ROCH(X)R' (where R = C1-5 alkyl; R' = H or C1-5 alkyl; X = halo, pref. ClCH2OCH3) with a cpd. having one or more hydroxyl functions in a first long zone, and then with at least one alkylene oxide in a second long zone, both at 20-150 degrees C for 1-30 (pref. 5-15) min. glycol halohydrin is stripped off the product. The method is continuous and gives high yields.
Patent FR-2170308-A6 (FR)
Title: Solvent for sulphoresinates of the platinum gp - and catalyst supports impregnated with such solutions
IPC: B01J37/02
Filed: 1971-12-31
Granted: 1973-09-14
Abstract: Solvent is isophorous, chloroform nitrobenzene, orthodichlorobenzene or pref., cyclohexanone. Solvent has a constant b.pt. lower than the sassafras oil used in the parent patent and has uniform props. from one sample to the next. Solvent is used in impregnating the Pt gp metal cpd into catalyst supports, which are subsequently dried and heated to >200 (200-300) degrees C to deposit the Pt gp metal or its oxide as catalyst.
Patent BE-1015480-A6 (BE)
IPC: A61L9/14
Filed: 2003-04-24
Granted: 2005-04-05
Abstract: The procedure consists of installing 55W ultraviolet lamps at intervals through holes made in the air duct, with two lamps in each 1500 mm section after a fire-break shutter. The holes are covered with self-adhesive foam seals and metal plates held in place by rivets or selftapping screws, and the lamps are connected up to a panel with a timer. From time to time, e.g. twice a year, the duct is cleaned with a low-pressure vaporized solution of H2O2-H3PO4-AgNO3, which leaves only water and oxygen in the air after use.
Patent BE-1017115-A6 (BE)
Filed: 2006-04-27
Granted: 2008-02-05
Abstract: The boiler heat transporting tubes (5) introduced directly in the boiler for diffusing heat from a bent tube (2), where a sensor is placed under the boiler for obtaining a thermo-siphon effect. The tubes contain heat transfer fluid/gas and are integrated mechanically to a heat exchanger. The bent tube connects the bottom of the boiler to an output of sensor, where the bent tube traversed by the water of the boiler removes the heat. A compression gland (9) assures sealing of each heat transporting tube in the boiler.
Patent BE-1003354-A7 (BE)
Title: Ordinateur a carte unique.
Inventor: COATES DAVID
IPC: G06F15/78
Filed: 1991-09-10
Granted: 1992-03-03
Abstract: Un ordinateur a carte unique (1) comprend une unité centrale de calcul (3) qui communique avec une mémoire principale (4) à travers un bus processeur/mémoire (5). Un co-processeur (14) laissant passer les messages assure l'interfaçage avec un bus système MULTIBUS II parallèle (17) et les données sont transférées entre le bus (17) et une mémoire tampon (19) sous le contrôle (20) sur un bus entrée/sortie (23). Une porte (33) et un tampon (34), sous le contrôle d'une machine d'état finie (36) accouple et désaccouple alternativement le bus entrée/sortie (23) et le bus processeur/mémoire (5) pour permettre alternativement le transfert de données entre la mémoire tampon (19) et la mémoire principale (4), et la communication simultanée indépendante respectivement sur le bus processeur/mémoire (5) et le bus entrée/sortie (23).
Patent FR-2302002-A7 (FR)
Title: Cable operated vehicle window winder - has curved openings in base flange to receive forked adjustment key
IPC: E05F11/48
Filed: 1975-02-19
Granted: 1976-09-17
Abstract: The cable-operated mechanism for raising and lowering of vehicle windows, consists of a bucket-shaped drum (6) wedged onto a hub (3), the open end being opposite the hub's flange (15). An external rim (11) which rotates on the hub between the open end of the drum and the flange, has teeth which mesh with corresponding elastic teeth on the drum itself. One end of the cable is attached to the drum and the other to the rim and the flange has curved openings extending along a circumference coaxial with relation to the control shaft (4) and opposite to a number of hollows made on the rim on a circumference approximately the same as that of the said curved openings. The cable can thus be adjusted by means of a forked key inserted through the openings which can rotate the rim.