baber/WOPTO huggingface dataset:
Patent DD-156170-A5 (DD)
Title: Verfahren und vorrichtung zur veraenderung des farbflusses an druckmaschinen-farbwerken
Inventor: WEISGERBER WILLI
IPC: B41F31/04
Filed: 1981-02-05
Abstract: Verfahren und Vorrichtung zur Veraenderung des Farbflusses an Druckmaschinen-Farbwerken, insbesondere zum unterschiedlichen Verstellen einzelner Breitenzonen eines Farbmessers oder einzelner Farbdosierelemente, mittels einer Vielzahl von Verstelleinrichtungen, die ueber Steuereinrichtungen nach Massgabe einer Sollwert-Veraenderungsvorgabe in unterschiedlichem Mass verstellt werden. Die Aufgabe besteht darin, die Veraenderung des Farbflusses so vorzunehmen, dass eine automatische und reproduzierbare Einstellung eines Farbwerkes bezueglich des gewuenschten unterschiedlichen Farbflusses und dessen Konstanthaltung in Querrichtung des Farbwerkes erreicht wird. Dies wird erfindungsgemaess dadurch geloest, dass fuer jede Verstelleinrichtung ein Sollwert-Speicher vorgesehen wird, bei einer Sollwert-Veraenderungsvorgabe durch eine Sollwert-Verstelleinrichtung die Werte aller Sollwert-Speicher mit dem gewuenschten, vorgegebenen Sollwert-Veraenderungsfaktor multipliziert und diese Multiplikationsprodukte als neue Sollwerte an die Sollwert-Istwert-Vergleichseinrichtungen weitergegeben werden.
Patent DD-202536-A5 (DD)
Inventor: MASSAU PETRUS J VAN
IPC: C07C239/00
Filed: 1982-03-01
Abstract: An improved process for the removal of urea, ammonia, and carbon dioxide from process condensate derived from coupled urea and ammonia syntheses by hydrolysis of urea and desorption of ammonia and carbon dioxide. Process condensate poor with respect to ammonia is treated at a pressure of between about 15 and 42 bar and a temperature of between about 200 DEG  C. and 320 DEG  C. in a reaction column with steam to form a gas mixture containing ammonia, carbon dioxide, and water vapor, and an aqueous liquid virtually free of urea, ammonia, and carbon dioxide.
Patent DD-205904-A5 (DD)
Title: Verfahren zur herstellung von imidazo (4,5-c) pyridin-derivaten
Inventor: KING
IPC: C07D295/192
Filed: 1982-11-09
Abstract: DIE ERFINDUNG BETRIFFT EIN VERFAHREN ZUR HERSTELLUNG VON IMIDAZO(4,5-C)PYRIDINDERIVATEN UND DEREN N-OXIDEN UND SAEUREADDITIONSSALZEN, DIE ALS WIRKSTOFFE VON PHARMAZEUTISCHEN PRAEPARATEN, INSBESONDERE ZUR BEHANDLUNG VON HERZERKRANKUNGEN GEEIGNET SIND. BEISPIELSWEISE WIRD 2-(2,4-DIMETHOXYPHENYL)-1H-IMIDAZO(4,5-C)-PYRIDIN DURCH UMSETZUNG EINES GEMISCHES AUS 2,4-DIMETHOXY-BENZOESAEURE UND 3,4-DIAMINOPYRIDIN MIT PHOSPHOROXYCHLORID ERHALTEN.
Patent DD-214405-A5 (DD)
Title: Dampfbuegelvorrichtung
Inventor: CAVALLI ALFREDO
IPC: D06F75/12
Filed: 1984-02-28
Abstract: Die Erfindung betrifft eine Dampfbuegelvorrichtung, bestehend aus einem Dampfbuegeleisen, dessen Koerper als Dampferzeugerkammer (Verdunstungskammer) ausgebildet ist, die mit einer Vielzahl von Durchgangsloechern in der Platte desBuegeleisens in Verbindung steht. Waehrend das Ziel in der Verbesserung der Buegelqualitaet, der Verminderung des Unfallrisikos und der Vermeidung von Arbeitsunterbrechungen beesteht, ist es Aufgabe, eine Regelung der Zufuhr der Wassermenge bzw. des Dampfvolumens zu ermoeglichen. Eine Einheit, diedie Dampferzeugerkammer mit Wasser versorgt, umfasst einen Wasserbehaelter, der in der Naehe vom Dampfbuegeleisen aufzustellen ist, ein Rohr fuer die Befoerderung von Wasser vom Behaekter zur Verdunstungskammer und ein Absperrventil am Buegeleisen, das durch einen Handregler am Handgriff des Buegeleisens fuer die Regelung der Wasserzufuehrung durch das Rohr zur Dampferzeugungskammer betaetigt werden kann.
Patent DD-283974-A5 (DD)
Title: Verfahren und anordnung zur verhinderung bzw. verringerung von korrosionen
Inventor: WERLING GEZA
IPC: B60H1/24
Filed: 1989-06-09
Abstract: Die Erfindung bezieht sich auf ein Verfahren und eine Anordnung zur Verhinderung bzw. Verringerung von Korrosionen an Fahrzeugen, insbesondere Kraftfahrzeugen. Das Wesen der Erfindung besteht darin, dasz Auszenluft und/oder eine vom Fahrzeug-Kuehlgeblaese oder auf sonstige Weise erzeugte, intensive Luftstroemung zwangsweise in die korrosionsgefaehrdeten Hohlraeume der Karosserie und des Fahrzeugrahmens eingeleitet wird, um eindringende korrosionsverursachende Medien abzulenken bzw. eingedrungene korrosive Fluessigkeiten und/oder Feuchtigkeit abzuleiten. Fig. 1{Fahrzeuge; Kraftfahrzeuge; Karosserie; Fahrzeugrahmen; Korrosionsschutz; Karosserie-/Fahrgestell-Hohlraeume; intensive Luftstroemung}
Patent DD-291894-A5 (DD)
Title: Verfahren zur herstellung von schichtverbunden aus hochpolymeren werkstoffen, organischen klebern und metallschichten
Inventor: HELD KARL
IPC: H05K1/02
Filed: 1990-01-29
Abstract: Die Erfindung betrifft ein Verfahren zur Herstellung von Schichtverbunden aus hochpolymeren Werkstoffen, organischen Klebern und Metallschichten. Sie betrifft ein Verfahren zur Herstellung von Schichtverbunden aus Hochpolymeren, vorzugsweise Polyimid oder Polyester, organischen Klebern und flaechigen bzw. strukturierten Oberflaechen aus Metallschichten. Ziel der Erfindung ist, die Haftfestigkeit des Klebers auf dem polymeren Traegermaterial so zu gewaehrleisten, dasz mittels eines nachfolgenden Kaschierprozesses aufgebrachte Metallfolien einen stabilen Polymer-Kleber-Metall-Schichtverbund ergeben. Erfindungsgemaesz wird die Aufgabe dadurch geloest, dasz der polymere Werkstoff mit einem Laser, vorzugsweise einem Excimerlaser, bestrahlt wird, was zu einem anisotropen Abtrag an der Werkstueckoberflaeche fuehrt. Die derart modifizierte Oberflaeche bietet guenstige Voraussetzungen fuer eine mechanische Verankerung des Klebers auf dem polymeren Traegermaterial und dient als Ausgangspunkt fuer eine flaechige Metallisierung, die mittels Subtraktivverfahren strukturiert wird bzw. fuer eine strukturierte Metallisierung.{Polymere; Klebstoffe; Laserbestrahlung; flexible Basismaterialien; elektrische Leiterplatten; Subtraktivverfahren; strukturierte Metallisierung}
Patent DD-293508-A5 (DD)
Title: Verfahren zur aufbereitung von spannbetonschwellen und stabfoermigen betonelementen zur wiederverwendung des bewehrungsstahles und des betonbruchs
Inventor: RADLOFF GUENTER
IPC: B02C1/04
Filed: 1990-04-12
Abstract: Die Erfindung beinhaltet ein Verfahren zur Aufbereitung von Spannbetonschwellen und stabfoermigen Betonelementen zur Wiederverwendung des Bewehrungsstahles und des Betonbruches. Die Erfindung betrifft ein Verfahren zur Aufbereitung von demontierten Spannbetonschwellen aus Gleisbetten von Eisen- und Nahverkehrsbahnen wie auch fuer gealterte und deformierte stabfoermige Betonelemente, z. B. Stuetzen, Streben, Pfaehle u. dgl. Die in Laengsrichtung dem Backenbrecher aufgegebenen Betonelemente werden durch den Brechdruck in Betonbruch und Bewehrungsstaebe aufgeloest. Die waehrend des Brechprozesses und unmittelbar danach den Brecherauslauf im freien Fall verlassenden Bewehrungsstaebe werden durch eine Umlenkvorrichtung, die eine Deformierung verhindert, auf ein Gurtband geleitet und ueber ein angetriebenes Rollensieb nichtmagnetisch vom begleitenden Betonbruch getrennt, mittels Laufrollen in einen Auffangbehaelter befoerdert, magaziniert und der Wiederverwendung bei der schlaffen Bewehrung von Betonelementen zugefuehrt. Fig. 1{Spannbetonschwellen, demontiert; Gleisbett; Betonelemente, stabfoermig, gealtert, deformiert; Stuetzen; Streben; Pfaehle; Brechdruck; Betonbruch; Bewehrungsstaebe; Umlenkvorrichtung; Rollensieb, angetrieben, nichtmagnetisch; Auffangbehaelter}
Patent DD-293722-A5 (DD)
Title: Adapter mit inkorporierter klappe fuer blutpumpen und verfahren zu seiner herstellung
Inventor: BEHREND DETLEF
IPC: A61M1/10
Filed: 1990-04-26
Abstract: Die Erfindung betrifft einen Adapter mit inkorporierter Taschenklappe fuer Blutpumpen, der konstruktiv so gestaltet ist, dasz die Adapterinnenbeschichtung und die kuenstliche Klappe aus einem Werkstoff, vorzugsweise Polyurethan, bestehen und nahtlos ineinander uebergehen. Das Loesungsprinzip ist fuer Adapter fuer Assistsysteme als auch fuer Adapter fuer Ventrikel zum kuenstlichen Totalherzersatz von Membran-, Sack- oder Druckplattentyp einsetzbar. Fig. 1{Blutpumpen; Adapterstueck; festhaftende Innenbeschichtung; angegossene Herzklappe}
Patent DD-293900-A5 (DD)
Title: Verfahren zur mikrofichplanfilmaenderung
Inventor: HAMMER GUENTER
IPC: G03C11/00
Filed: 1990-04-26
Abstract: Fuer die Herstellung geaenderter Diazofilme werden 2 Silberfilme verwendet, wobei auf dem 1. Silberfilm die zu aendernden Stellen herausgestanzt und auf dem 2. Silberfilm an gleicher Stelle die aktuellen Informationen verfilmt werden. Durch das deckungsgleiche UEbereinanderlegen beider Filme entsteht beim Duplizieren der geaenderte, aktualisierte Diazofilm.{AEnderung; Mikrofich; Silberfilm; Diazofilm; Stanzen}
Patent DD-295246-A5 (DD)
Title: Enzymimmunoassay zur identifizierung von spermaspuren durch den nachweis spermaspezifischer 30 kda-antigene
Inventor: KARSTEN UWE
IPC: C12P21/08
Filed: 1990-04-12
Abstract: Die Erfindung betrifft einen Enzymimmunoassay zur Identifizierung von Spermaspuren durch den Nachweis spermaspezifischer 30 kDa-Antigene mit einem monoklonalen Antikoerper, der im Testsystem Spermaantigene auch aus denaturiertem Material erkennt. Anwendungsgebiet der Erfindung sind die Kriminalistik und die Gerichtsmedizin. Der erfindungsgemaesze Enzymimmunoassay ist dadurch gekennzeichnet, dasz im indirekten Test der monoklonale Antikoerper A67-C/F10 (ZIM-0509) als Erstantikoerper in Kombination mit einer speziellen Anti-Maus-IgM-Praeparation, gekoppelt mit Alkalischer Phosphatase, eingesetzt wird. Das erfindungsgemaesze Testsystem ermoeglicht durch den Nachweis spermaspezifischer 30 kDa-Antigene aus denaturiertem Material die Identifizierung kriminalistisch relevanter Spermaspuren, auch wenn mikroskopisch Spermatozoen nicht feststellbar sind.{Antigene, spermaspezifische; Antikoerper, monoklonale; Enzymimmunoassay; Spermanachweis; Spermaspuren; Kriminalistik; Gerichtsmedizin}
Patent DD-299171-A5 (DD)
Inventor: BERGOUGNAN MICHEL
IPC: C07C17/20
Filed: 1990-10-01
Abstract: Continuous manufacture of 1,1,1-chlorodifluoroethane from 1,1,1-trichloroethane and hydrofluoric acid by liquid phase reaction in the presence of at least one fluorination catalyst. According to the invention the operation is carried out at an absolute pressure of between 6 and 30 bars and at a temperature of between 50 and 120 DEG C, the catalyst content of the reaction mixture, expressed as weight percentage of metal, being between 0.05 and 10% and its content of organohalogen by-products outside 140 series being regulated at a value of less than 40% by weight. This process makes it possible simultaneously to obtain a high degree of conversion of hydrofluoric acid, to minimise the coproduction of 1,1,1-trifluoroethane and of organohalogen by-products, and to make it easier to recover the hydrochloric acid formed.
Patent BE-1018099-A5 (BE)
Title: Mobile shelter, has two folding side panel portions fitted with respective panel sections in extended position, roof slightly slope towards outer side of shelter, and window arranged in middle of central panel section of frame
Filed: 2008-04-17
Granted: 2010-05-04
Abstract: The shelter (1) has a structure with a roof (2) and sidewalls (3) on a substrate (4). A foldable panel (6) comprises a central panel section (8) fixed to a frame (7). Two folded side panel portions (9), which hinged on a side (10) of the central panel section, are fitted with respective folded side panel portions in an extended position. The roof is slightly slope towards an outer side of the shelter, and a window is arranged in middle of the central panel section of the frame.
Patent BE-1011243-A6 (BE)
Title: Method and installation to treat absorbent substances containing asbestos in acetylene cylinders
IPC: A62D101/41
Filed: 1997-06-27
Granted: 1999-06-01
Abstract: Treatment method to eliminate asbestos contained in absorbent substances of acetylene gas cylinders with a system comprising in a single degassing operation the draining of the acetylene gas cylinders and elimination of the asbestos fibres and mineral fibres. Liquefaction of the absorbent substances transferred into a completely closed system to the inside of a reaction vessel supplied with a basic attack solution, reaction in gaseous medium. The asbestos and mineral fibres are eliminated 100%. At the end of the reaction, separation of the liquids and solids by a special filter press system under pressure. The liquids return to the system to be revitalised for the new treatment. The solids are recycled into siliceous limestone substances with no shrinkage, or ceramics, dimensions as desired.<IMAGE>
Patent ES-2001028-A6 (ES)
Title: Herbicidal method comprising the use of diflufenican.
Inventor: HEWETT RICHARD HENRY
IPC: A01N43/40
Filed: 1986-07-21
Abstract: The present invention relates to a method of controlling the growth of weeds at a cereal crop locus which comprises applying to the locus (a) bromoxynil, which is 3,5-dibromo-4-hydroxybenzonitrile, or ioxynil, which is 4-hydroxy-3,5-diiodobenzonitrile, an agriculturally acceptable salt or ester thereof or a mixture thereof and (b) diflufenican which is N-(2,4-difluorophenyl)-2-(3-trifluoromethylphenoxy)-nicotinamide.
Patent ES-2002929-A6 (ES)
Title: 1-Methylation of lysergic derivs.
Inventor: IACCHETTI GIOVANNI
IPC: C07D457/02
Filed: 1986-11-28
Abstract: Lysergic derivs. of formula (I), in which A is a double bond or single bond plus a 10-methoxy gp., and Y is H, lower alkanoyl or benzoyl, with adrenalytic and anti-serotonic activity in pharmaceutical compsns., are methylated in 1-position by treatment in DMF soln. with (a) methyl iodide and sodium hydride, or (b) dimethyl oxalate and potassium tert.-butoxide.
Patent ES-2004677-A6 (ES)
Title: Automatic appts. for draining condensate from air receivers
IPC: F04B39/16
Filed: 1987-02-11
Abstract: The appts. includes in each receiver a pneumatically controlled valve, in the casing of which two chambers are provided, both being connected by a cylindrical passageway (14) provided at its ends with two conical valve seats. In operation, the position of a two-position electrovalve (36) controls the position of a plunger (21) carrying the valve members within the valve casing so that the change of such a position causes one valve member to move from its seat (15) and the passageway (14) between both chambers to be opened. - The condensate is then caused to be drained into the atmosphere through the other chamber (13). The passageway is closed again by the other valve member and then opened again and finally closed by the initially valve seat.
Patent ES-2008896-A6 (ES)
Title: Tank furnace for the metallurgical treatment of non-ferrous metals
Inventor: CARMINATI ANTONIO
IPC: C22B15/00
Filed: 1987-09-02
Abstract: A tank furnace for the metallurgical treatment of non-ferrous metals, consisting of a refractory hearth in the form of an inverted arch disposed on perimetral plate assemblies which are able to move in order to compensate for hearth expansion, a containing belt formed of metal box elements, and walls and a crown of refractory material, said elements being separately supported by an external frame and being able to slide relative to each other due to thermal expansion.
Patent ES-2005323-A6 (ES)
Title: Method of providing a substructure construction for an artificial grassfield and an artificial grassfield having such a substructure construction.
Inventor: HEERKENS JOSEPHUS CORNEL
IPC: E01C13/00
Filed: 1987-09-15
Abstract: A method of providing a substructure construction for an artificial grassfield by providing a foundation on a layer of sand which is present or has been provided, said foundation for the larger part consisting of natural round sand or river sand to which a material of organic orgin is added in an amount of more than 1 weight %, calculated on the quantity of sand, whereby 60-70 weight % of river sand is distributed evenly among a quantity of 40-30 weight % of rubber particles.
Patent ES-2010521-A6 (ES)
Title: Control-disc valve
Inventor: KRESS HERMANN
IPC: F16K31/52
Filed: 1987-09-30
Abstract: In a control-disc valve which is intended, in particular, for the sanitary sector, a movable control disc is displaced in a linear manner relative to a fixed control disc by means of a pivoting shank. The actuating shank is mounted pivotably by means of a pivot pin and engages with a driving head in a drive opening in the movable control disc. Both the driving head and the drive opening have flat surfaces which extend parallel to the axis of the pivot pin and rest flat against one another. Either the flat surfaces of the driving head or the flat surfaces of the drive recess are pivotable about an axis which extends parallel to the axis of the pivot pin (Figure 2).
Patent ES-2009576-A6 (ES)
Title: Variable ratio clutch lever
Inventor: KUMMER MARTIN E
IPC: F16D13/70
Filed: 1988-03-28
Abstract: An apparatus and a method are disclosed for varying the effective length of the levers which actute a collector ring in a clutch. Each of the levers includes a pair of noses which are angled toward the inner end of the levers and toward the collector ring to provide a point contact which moves along the surface of the nose as the levers are rotated by a throw-out bearing. Thus, the force required to actuate the throw-out bearing and/or the force applied to a pressure plate can be varied in accordance with the geometry selected for the noses and the collector ring.
Patent ES-2007503-A6 (ES)
Title: Apparatus for cleaning the abdominal cavity of fish
Inventor: HARTMANN FRANZ
IPC: A22C25/14
Filed: 1988-06-07
Abstract: An apparatus for gutting fish makes use of a tool driven to revolve. Starting from the idea of a combined slitting tool for opening the abdominal cavity and cleaning tool for removing the viscera, it is proposed to prevent the thereby unavoidable damage to the abdominal skin covering the sides of the abdominal cavity by designing the tool solely as a cleaning tool and equipping it with laterally associated spreaders. The latter are constructed as hollow elements and provided with nozzle bores in their flanks facing the cleaning tool and have a water connection through which water can be led to the nozzle bores with the effect that the water jets keep the belly spread apart when the cleaning tool enters the abdominal cavity.
Patent ES-2010302-A6 (ES)
Title: Polyurethane foam filling prodn.
Inventor: GREGORIO CASAMIAN JOSE MANUEL
IPC: B68G7/06
Filed: 1988-08-04
Abstract: The polyurethane foam, cut into pieces of uniform size, is made from off-cuts which are placed on a feed table with two converging conveyor belts which lead the foam into roller cutters for the first cut. The pieces are deposited on a second table with a conveyor belt which carries it to a container. From there it is conveyed on a third table to a toothed knife mill working in conjunction with a toothed block, which cuts it to uniform size. (1)
Patent ES-2013377-A6 (ES)
Title: A method and installation for the handling of articles, particularly for automatic packaging lines
Inventor: FRANCIONI RENZO
IPC: B65G43/08
Filed: 1988-12-09
Abstract: A unit for transferring articles, for example a manipulator or a robot (1), which periodically supplies groups of articles (A), has an associated continuous conveyor (3) provided with positions (3a) for receiving the articles (A). The conveyor (3) is moved intermittently, with a rest condition in which a group of articles (A) supplied by the transfer unit (1) is introduced into respective receiving positions (3a) of the conveyor (3), and a condition of movement, in which the conveyor (3), advances by a number of receiving positions (3a) at least equal to the number of articles (A) in each group. The solution described enables the structure of the transfer unit to be simplified.
Patent ES-2019544-A6 (ES)
Title: Alveolar (cellular) container and support for said container, especially for perishable goods
Inventor: XUFRE GODAYOL ENRIC
IPC: B65D81/38
Filed: 1990-03-23
Abstract: It comprises a plurality of cells 2 which are joined together and covered by a closure film 4 in order to contain at least one preserving gas, which container 1 is supported by a support 6. Each cell 2 comprises a perimeter edge 5 in the form of a flange folded towards the body of the cell 2, which edge 5 facilitates resting thereof on the ribs 18, 19 of the support 6. The closure film 4 comprises at least one breathing valve 7 formed by weakened areas of said film 4 and is arranged in the form of an externally convex domed shape over each one of the cells 2. Both the upper frame 10 and the lower frame 12 comprise a pair of flanges 14, 15, 16, 17 which project externally in order to increase the mechanical strength of the structure of the support 6. The products are allowed to breath and the container 1 and the support 6 are strengthened.
Patent ES-2025889-A6 (ES)
Title: Energy generator
IPC: H02K53/00
Filed: 1990-06-28
Abstract: It is structured from a circular platform 1 mounted on a central column 3 with the cooperation of a blocking and oscillating transmission 2, said platform resting at its periphery on a wheel 9 associated with a motor 4 which in turn, and via another wheel 6, rests on a lower, fixed platform 7 in such a manner that the rotation of said motor generates rotation of the wheel 6 and its own planetary displacement, giving rise to a permanent rocking of variable angle for the circular platform 1 via the wheel 9. On this circular platform 1 rests another wheel 10, of greater weight and dimensions than the wheel 6 and distanced further from the central column or axis of rotation 3, on which is established a generator 12 which generates the necessary energy for the motor 4 and which in turn transmits a rotary movement to the column 3 which, via the converter 15, is supplied to an alternator 16 or to an auxiliary alternator 16' where the electrical energy which is to be consumed is actually generated.
Patent FR-2151650-A6 (FR)
Title: Vertical centrifuge bowl liner - with integral lifting and emptying mechanism
IPC: B04B11/00
Filed: 1971-09-02
Granted: 1973-04-20
Abstract: Removable liner for a vertical centrifuge bowl in which the top edge of the liner is fitted with a lifting hoop and a smaller hoop secured to the bottom edge is connected to a vertically-displacable emptying rod, so that the liner can be emptied by moving the bottom hoop vertically down while the top hoop is held stationary. The displacable emptying rod is now replaced by a spring-loaded catch which is pivoted on a cross-bar of the top hoop and adapted to engage an eye on the centre of the bottom hoop except when disengaged to empty the liner. This obviates the need for a special support and emptying rig.
Patent FR-2226844-A6 (FR)
Title: Cardboard boxes for fruit packaging - perforated coated linings protect from damp and allow air circulation
IPC: B31B3/46
Filed: 1973-03-27
Granted: 1974-11-15
Abstract: Folded cardboard boxes, in particular for packaging fruit, with the edges and corners rounded to prevent damage to cellophane wrapping. The boxes are made of corrugated cardboard covered with sheets of perforated paper. The micro-holes through the sheets need not pass through the cardboard support. The inner surface is lined with perforated paper coated with one of several possible coatings to protect the box from damage due to dampness. The boxes are made continuously on a machine which feeds sheets, perforates, folds, glues and coats them. The completed boxes can be built into piles.
Patent FR-2050498-A7 (FR)
Title: Tubular articles of fibre reinforced material - for air frames
IPC: B64C27/473
Filed: 1970-06-30
Granted: 1971-04-02
Abstract: Articles consist of an assembly of individually preformed tubular elements formed from fibre reinforced synthetic resin material. The reinforcing fibres may be carbon and a filler may be incorporated with a high strength/weight ratio, the fibrous structure being enclosed in an external skin. A suitable filler has a honeycomb structure. The tubular elements are pref. parallel and may be end to end with the intervening spaces occupied by filler. The structures are sufficiently strong and rigid to be used as structural components in aircraft.