baber/WOPTO huggingface dataset:
Patent CN-1067935-A (CN)
Title: 服装干洗技术
Inventor: HONGSHENG WANG
IPC: D06F43/00
Filed: 1992-04-25
Abstract: 一种服装干洗技术，属人类生活需要技术领域。
特点是毛、呢、绒料、裘料，软革皮料服装都有专用的
去污剂，普洗剂及漂白剂，去污剂与漂白剂结合，完成
毛呢、绒料服装干洗任务；软革皮类服装也有专用去
污剂，不同质料服装采用相应的干洗工艺组成配套的
干洗技术。该干洗技术不需专门设备，只需吸尘器，
毛刷等简易工具，各类去污剂原材料易得，干洗工艺
简便易行，成本低，衣物不相互串色，衣带病菌不传
染，干洗衣物不变形，易于在中小城镇及农村推广应
用。
Patent CN-1087144-A (CN)
Title: 带毛圈的三层针织物及供针织的三角装置
Inventor: LEE EUI-GHUL
IPC: D04B15/32
Filed: 1992-11-19
Abstract: 一种带毛圈的三层针织结构，其中的三角装置具

有一为关边、针织和集圈组织而设计的针盘三角，并

为第一根喂入纱采用二层三角，针盘三角联结成可以

进行针织三层结构针织的一整个循环，而针筒三角则

安排在四层中以进行多层针织。
Patent CN-1159705-A (CN)
Inventor: TOKUICHI ITO
IPC: H04N7/173
Filed: 1996-09-08
Abstract: 向记录媒体上记录及从记录媒体重放视频数据的装置和方法，可与多个外部设备通信，该装置包括多个音频/视频数据输入/输出设备，其每个都可编程，并从相应的外部设备接收视频数据及传送重放的视频数据，在重放操作时，产生相应的记录/重放请求信号，并输出相应的请求信号，以接收从记录媒体重放的数据，并提供重放数据给外部设备，在记录操作时，接收外部设备来的视频数据，并将提供的视频数据记录在记录媒体上，该装置还包括存储器控制设备。
Patent CN-1241264-A (CN)
Title: 形成具有全天然外观的有色隐形镜片的方法及由其制备的产品
Inventor: CHAPOY L L
IPC: B29D11/00
Filed: 1997-12-17
Abstract: 形成隐形镜片的方法,此镜片带有的着色环能在戴用上此镜片时覆盖此眼边缘区的一部分或全部。所述形成隐形镜片的方法包括依边缘环图案将着色剂涂布到单侧隐形镜片模具的表面上,然后以可聚合物质充填此单侧隐形镜片模具,再模铸此物质而形成包含有边缘环图案的模制表面,并对此表面的相对侧进行机加工而构成一与此模制表面相对的精加工过的表面侧。
Patent CN-1212776-A (CN)
Inventor: GREEN IAN MACDONALD
IPC: G06K19/12
Filed: 1997-01-14
Abstract: 一种用于识别数据载体(15)的方法,该载体例如是信用卡、补贴卡、访问控制卡、识别卡或存储价值卡,用于顺次放置多个有理数(12,13,14)数据,相邻的数字之间具有一个标记(11),该方法包括:a)检测从数据载体的一个固定点(16)到一个标识的某部分之间的距离(17);b)将该距离除以相邻的标记的相应给定部分之间的距离,从而得到一个有理数(x);及c)按照某个方向用与所述标记相邻的序列数字减去该有理数(x),从而得到一个可以唯一识别数据载体的另一个有理数。
Patent CN-1220008-A (CN)
Inventor: LEJEUNE PHILIPPE
IPC: G01R35/04
Filed: 1997-05-23
Abstract: 一种装置(1)包括处理装置(13),它能够控制检验机(2)执行至少一些其步骤的,每次减少至少一个持续时间直到满足一个考虑由该装置在每个减少的持续时间值测量的电量的分布的终止标准,并设置至多等于企初始值的一个新的持续时间,所测量的电量分布满足一个所选择的分布条件。它还包括一个函数发生器(14),它能提供应用于至少一个在一个所述步骤期间执行的比较的一个函数,使得所述函数在新的周期的测量上操作。
Patent CN-1228392-A (CN)
Inventor: LIN RONGGUI
IPC: C03C12/00
Filed: 1998-03-11
Abstract: 本发明公开了一种特种中碱玻璃球的制造方法,该玻璃球主要采用原矿粉及熟料作为原辅料,加入含氧化锂(Li 2 O)的强助熔剂,通过合理的配料等确保了玻璃球的化学成分和质量。本发明具有配方科学、合理、原辅料价格低且易得,延长熔窑寿命,提高拉丝产量等优点。
Patent CN-1253505-A (CN)
Title: 可倾倒的藻酸盐组合物
Inventor: BANNING DOUGLAS
IPC: A61K33/10
Filed: 1998-04-23
Abstract: 本发明提供了一种含有高浓度的藻酸钠和碱金属碳酸氢盐的含水可倾倒的液体组合物,其中藻酸钠中的平均甘露糖醛酸残基与古洛糖醛酸残基之比为至少0.6∶1。此外,提供了用于在肠胃粘膜组织上形成保护层的藻酸盐或藻酸、其用途和含有所说藻酸盐或藻酸的组合物。
Patent CN-1246576-A (CN)
Title: 自行车锁
Inventor: SHEPOD WEIEN
IPC: E05B15/16
Filed: 1999-07-16
Abstract: 公开了一种自行车锁1,包括其上带有凹槽的主体件2,从主体件2延伸到自由端5的封闭件3,和一个固定到封闭件3的自由端5并且可锁定啮合进凹槽以形成一封闭环的成型结构7,其特征在于,当形成封闭环时,硬化件12从安放于凹槽中的成型结构7局部延伸出进入到封闭件3中。
Patent CN-1295855-A (CN)
Title: 复方紫丹颗粒剂及其制备方法
Inventor: SONG FANGJI
IPC: A61K9/16
Filed: 1999-11-12
Abstract: 复方紫丹颗粒剂及制备方法,用于治疗银屑病,制法是按原料配比分别将紫草、丹参用乙醇提取、浓缩成浸膏备用;将三棱、莪术加水提取挥发油、药液备用;再取乌梅及白癣皮分别煎煮,合并两次药液及上述药液,滤过并浓缩至清膏,与上述浸膏合并,加糊精、淀粉混均,干燥至干膏;粉碎、过筛、加糖粉混匀,加70%乙醇制粒;干燥、整粒、喷入乙醇溶解的挥发油,封闭两小时即得。疗效:能明显抑制上皮细胞的有丝分裂,促进表皮颗粒层形成,并对慢性非特异性炎症反应有明显的抑制作用。
Patent CN-1303507-A (CN)
Title: 音乐盒装置
Inventor: KATSUHIKO HAYASHI
IPC: G10F1/06
Filed: 1999-05-28
Abstract: 提供了一种音乐盒装置,其构件设置于一个单元中。里面储放弹簧38的基座壳体36以及支承调速机构24的弹簧齿轮58和增速齿轮系32和33的基座30用合成树脂模塑成与其合成一体。调速机构24的增速齿轮系32的转轴和调速旋转体25的转轴26支承成与基座30和弹簧储放盒36相配合,从而构成一弹簧动力源单元,供给受控制的稳定的旋转输出。
Patent CR-20110003-A (CR)
Title: Quemador de gas para hornos o parrillas
Inventor: BETTINZOLI ANGELO
IPC: F23D14/10
Filed: 2011-01-10
Abstract: Quemador de gas (1) para hornos, o parrilla, del tipo que comprende un tubo Venturi (2) para mezclar gas combustible y aire primario, una camara de distribución principal (3), extendida longitudinalmente en la dirección de avance del flujo de la mezcla, y colocada corriente abajo de tal tubo Venturi (2).
Patent CR-20170167-A (CR)
Title: Derivados de imidazol pentacíclicos fusionados
Inventor: HEER JAG PAUL
IPC: C07D493/18
Filed: 2015-10-02
Abstract: Una serie de derivados de imidazol pentacíclicos fusionados, que son potentes moduladores de la actividad de TNFa humano, son en consecuencia beneficiosos en el tratamiento y/o prevención de diferentes enfermedades humanas, que incluyen trastornos autoinmunológicos e inflamatorios; trastornos neurológicos y neurodegenerativos; trastornos de dolor y nociceptivos; trastornos cardiovasculares; trastornos metabólicos; trastornos oculares; y trastornos oncológicos.
Patent EC-SP003824-A (EC)
Title: Composiciones novedosas de latex organico de baja volatilidad e internamente plastificadas y sus aplicaciones
Inventor: THAMES FRELAND SHELBY
IPC: C09D127/00
Filed: 2000-12-14
Abstract: Se divulgan y reivindican composiciones nuevas de látex o emulsión conteniendo monómeros internamente plastificados y entrelazados derivados de aceites semi-secantes o no secantes tradicionales. Lo monómeros son ésteres etílenicamente no saturados de componentes de largas cadenas olefínicas. Divulgaciones preferidas incluyen látex formados de ésteres de acrilato o metacrilato de ésteres de ácido grasoso de hidroxi derivados de aceite de ricino o aceite de lesquerella. Un proceso para la síntesis de la composición de látex se divulga también, se involucra (a) una reacción de esterificación de ácido carboxílico etilénicamente no saturado o sus derivados con un componente hidroxi sustituido de una cadena larga olefínica; (b) subsecuente polimerización del éster etilénicamente no saturado formado de un componente de cadena larga olefínica en una fase acuosa con al menos otro monómero copolimerizable; y (c) la mezcla del polímero formado con al menos una secadora y un tensoactivo paraformar las nuevas composiciones de látex o emulsión. Estas composiciones forman películas a temperaturas mínimas bajas para formar películas (MFT) con intervalos de ¿5 a 10°C y curan a polímeros Tg superiores de ambiente de transición de vidrio sin el uso de cosolventes orgánicos tradicionales que contribuyen a la emisión de polución ambiental vía componentes orgánicos volátiles (VOCS). Estas composiciones son por lo tanto útiles en recubrimientos transportadores de agua, adhesivos de contacto y presión sensitivos y tintas
Patent EC-SP045364-A (EC)
Title: Banda compuesta enrollable para formar un caño helicoidal y método de fabricación del mismo
IPC: B29C48/12
Filed: 2004-10-15
Abstract: Una banda compuesta 10 enrollable para formar un caño helicoidal. La banda compuesta 10 comprende una banda de plástico alargada 11 con una porción de base 12 y por lo menos una porción de saliente extendida en sentido longitudinal 20 que se eleva desde la porción de base 12; y una banda alargada de refuerzo 30 extendida en sentido longitudinal que recibe soporte de la porción de saliente 20, teniendo la banda de refuerzo 30 una proporción de altura a grosor de por lo menos tres a uno y estando orientada en sentido sustancialmente perpendicular a la porción de base 12. Al enrollarse para formar un caño helicoidal, la banda de refuerzo 30 aumenta la resistencia del caño a las cargas de aplastamiento radial. Un reborde 40 sella la banda de refuerzo 30 al medio ambiente. Resulta preferido que la banda compuesta 10 comprenda además una lámina plana 50 extendida en sentido longitudinal y unida a la porción de base 12, que tenga módulo de Young y resistencia superiores a los de la banda de plástico 11. La lámina 50 mejora en gran medida el régimen de presión de un caño enrollado de la banda 10.
Patent EC-SP055837-A (EC)
Title: Ventana termicamente aislante
Inventor: WINFIELD ALAN H
IPC: E06B3/677
Filed: 2005-06-06
Abstract: La presente patente tiene que ver con una ventana térmicamente aislante que incluye un par de paneles de vidrio externos (10, 12) mantenidos separados por un miembro espaciador (16) y envueltos por un marco. Un miembro de marco (26) sirve como un miembro ocultador de reductor de humedad que contiene un cartucho de reductor de humedad removible (44). El cartucho de reductor de humedad está conectado a un sistema de conducto (42) proporcionando comunicación gaseosa con el espacio de aire entre los paneles de vidrio (10, 12).
Patent EC-SP066637-A (EC)
Title: Biaril sulfonamidas y métodos para su uso
Inventor: TAM STEVE YIK-KAI
IPC: C07D261/18
Filed: 2006-06-13
Abstract: La presente invención se refiere a biaril sulfonamidas y a su uso como, por ejemplo, inhibidores de metaloproteinasas. (Formula I)
Patent EC-SP099528-A (EC)
Title: Placa de lubricación para plato de enganche de semirremolque
Inventor: REGINATO DOMINGO MIGUEL ANGEL
Filed: 2009-07-20
Abstract: Se aplica en el plato de enganche que comprende una plataforma inferior (1) solidaria al chasis del tractor (T) sobre la que se apoya y descarga su peso una plataforma superior (3) solidaria al acoplado (A) del semirremolque, las cuales se mantienen vinculadas a través de un correspondiente perno de enganche (4), estando dichas plataformas superpuestas, con sus caras enfrentadas en contacto fricciona. Comprende una placa plana de material plástico que se dispone intercalada entre dichas caras enfrentadas de las plataformas superior (3) e inferior (1), y se fija a un a de dichas plataformas a través de medios de anclaje que le proveen un montaje estable e inmóvil. Su espesor varía entre 4 mm y 15 mm aproximadamente, e incluye una pluralidad de orificios pasantes que nacen desde cavidades de asiento para la cabeza de tornillos de fijación. En realizaciones preferidas incluye una pluralidad de canalizaciones circunferenciales de refrigeración definidas en su cara activa. También se contempla que presente una abertura divergente que se extiende hasta su punto central, prevista para ser colocada en la plataforma inferior permitiendo el ingreso del perno de enganche, o bien comprende un disco cerrado con un orificio central por donde atraviesa el perno de enganche, previsto para fijarse en la plataforma superior montada en el chasis del acoplado.
Patent EC-SP982707-A (EC)
Title: Secado de banano por cuchilla de aire
Inventor: POVEDA CAMACHO HUGO RUBEN
IPC: F25B21/00
Filed: 1998-10-23
Abstract: La presente invención sella la salida del latex en la corona de las manos del banano que se va a empacar para exportación; elimina los residuos de agua que va en las manos del banano antes de hacer el vacío en la funda plástica que va dentro de la caja de cartón que se exporta; elimina en su totalidad el uso de quimicos que se aplican al empacar el banano de exportación.
Patent EC-SP992996-A (EC)
Title: AGONISTAS DEL RECEPTOR ADRENERGICO ß-2
Inventor: GRIFFIN JOHN H
IPC: A61K31/04
Filed: 1999-06-08
Abstract: El invento actual está relacionado con compuestos de enlaces múltiples que son antagonistas del receptor adrenérgico b-32 y por lo tanto son útiles en el tratamiento y prevención de enfermedades respiratorias como por ejemplo asma, bronquitis y otras similares. Estos compuestos también son útiles en el tratamiento de lesiones del sistema nervioso y parto prematuro.
Patent FI-20021681-A (FI)
Inventor: HAMBLETON PHILIP THOMAS
IPC: A61K31/34
Filed: 2002-09-20
Abstract: A compound selected from the group consisting of all tautomeric forms of a cycloalkyl-propanamide of the formula    <IMAGE>  I  wherein R1 is cycloalkyl of 3 to 6 carbon atoms, R2 is hydrogen or alkyl of 1 to 3 carbon atoms, R3, R4, R5, R6 and R7 are individually selected from the group consisting of hydrogen, halogen, -NO2, azido, -CN, alkyl, alkoxy and alkylthio of 1 to 6 carbon atoms, -(CH2)m-CF3, -O-(CH2)m-CF3, -S-(CH2)m-CF3, m is an integer from 0 to 3, -CF2-Hal, -OCF2-Hal,   <IMAGE>    <IMAGE>   n is an integer from 1 to 3, Hal, Hal1, and Hal2 and Hal3 are individually halogen, and -COR', R' is -OH or alkyl or alkoxy of 1 to 3 carbon atoms or R4 and R5 together are -O-CH2-O- and their non-toxic, pharmaceutically acceptable basic salts having anti-inflammatory activity.
Patent GB-1000105-A (GB)
IPC: F16D49/16
Abstract: 1,000,105. External shoe-drum brakes. CONVEYANCER FORK TRUCKS Ltd. April 8, 1964 [April 29, 1963], No. 16841/63. Heading F2E. [Also in Division B7] In an industrial truck (see Division B7) a brake operates on the periphery of a wheel 3 and is actuated by an hydraulic piston/cylinder device 7 including a return spring 29. In Fig. 1, the brake shoe 17 is pivoted at 18 to adjustable yoke 13. Alternatively, a plate 30 with guides 32 slidable in the vehicle frame is connected by pin 20 to device 7 and carries either a segmented brake lining 35 (Fig. 2) on a spring steel strip 33 mounted on pins 34 or separate arcuate shoes pivoted to plate 30 (Fig. 4, not shown) and resiliently held in correct relationship with the wheel 3. To maintain a constant clearance between the brake lining and wheel a link 21, with a slot 25 through which passes a pin 26 of the brake shoe 17 or plate 30, is bolted to the frame with the interposition of fibre washers 23. The friction force on the link is such that as the lining 17b wears the link is moved to the left by device 7 but is not returned by the force of spring 29.
Patent GB-1053830-A (GB)
IPC: C09B29/08
Abstract: 1,053,830. 3 - Amino - acet - N - methylanilide derivatives. IMPERIAL CHEMICAL INDUSTRIES Ltd. April 9, 1965 [May 21, 1964], No. 21010/64. Heading C2C. [Also in Division C4] 3 - [N : N - di - (# - acetoxyethyl) amino]-acet- N-methylanilide is obtained by heating 3-[N: N- di - (# - hydroxyethyl) - amino] - acet - N - methylanilide with an excess of acetic anhydride. 3 - [N : N - di - (# - hydroxyethyl) amino]-acet- N-methylanilide is obtained by condensing 3 - amino - acet - N - methylanilide with two molecular equivalents of ethylene chlorohydrin in aqueous medium and in the presence of calcium carbonate as acid-binding agent.
Patent GB-1054273-A (GB)
IPC: H03M1/00
Abstract: 1,054,273. Digital-to-analogue converters. S. A. VAINER, and S. A. VAINER. Feb. 25, 1964, No. 7765/64. Heading G4H. A converter for producing a phase-displaced signal from a binary digital input signal comprises a number of cascade connected phaseshift cells each including two transformers, each having one primary and two secondary windings, the secondary windings of the two transformers being interconnected through relay contacts so that they provide the next cell with voltages, phase displaced or not according to whether the relay is operated or not. The two primary windings in each cell are fed by voltages in phase quadrature. In the inoperated state of the relay one of each pair of secondary windings is connected directly to the corresponding primary winding of the next cell. When the relay is operated each primary winding is serially connected to secondary windings of both transformers so that the quadrature voltages are added to give the desired phase shift. Cell E (Figure not shown), controlled by relay 11, gives a phase shift T1/4=45 degrees; cell D gives T1/8=22À5 degrees and so on. Relays 16 and 17 switch the input voltages to give phase changes of 90 degrees and 180 degrees. The converter may be used for machine tool control.
Patent GB-1227186-A (GB)
IPC: A61N1/36
Filed: 1968-09-18
Abstract: 1,227,186. Stimulating muscles. NATIONAL RESEARCH DEVELOPMENT CORP. 12 Sept., 1969 [18 Sept., 1968], No. 44455/68. Heading A5R. Apparatus for controlling muscles in living animals, including man, comprises a sensing circuit 12, 13 for sensing an electromyographic signal in a muscle, and a stimulation circuit 16 for automatically stimulating the same muscle when the sensed signal exceeds a predetermined level. The apparatus may be used in cases of incomplete nerve injury but is particularly adaptedfor the assistance of incontinent patients and includes electrodes 10, 11 which may be flat plates fitted to an anal plug. vaginal passage or to the perineal skin. Alternatively needle electrodes may be implanted close to the anal canal. The electrodes are coupled to an amplifier 12 and to a filter 13 having a frequency response which peaks between 100 and 200 Hz and falls off sharply below 100Hz and above 1000Hz. The filter output is rectified and, if required, smoothed by a circuit 14 supplying a D.C. signal to a threshold sensitive monostable multivibrator 15. If the sensed signal is above the predetermined level the circuit 15 assumes its quasistable state in which the amplifier 12 is cut off and the stimulation circuit 16 comprising an astable multivibrator, is allowed to oscillate providing 1 to 8 volt square, or other shaped, waves at a repetition rate of 20 Hz or more to electrodes 10, 11. Circuit 16 may alternatively yield bipolar output pulses. At the end of about 10 secs the circuit 15 reverts to its stable state and the apparatus reverts from a stimulating to a sensing mode. Two practical circuits are described, both including an integrated circuit operational amplifier. In the second circuit the electrodes are connected to the operational amplifier via a two stage differential amplifier, and to the stimulation oscillator via an isolating transformer.
Patent GB-1227991-A (GB)
IPC: F24H1/40
Filed: 1968-01-20
Abstract: 1,227,991. Hot-water boilers. CANNON INDUSTRIES Ltd. 10 April, 1969 [20 Jan., 1968], No. 3147/68. Heading F4A. A gas-fired water heater which may be fitted within a fireplace opening instead of a back boiler comprises a body defining an upright passage of rectangular cross-section the length of which cross-section is several times its width, an air inlet to the lower portion of the passage, a flue gas outlet from the upper part of the passage, a gas burner in or near the lower portion of the passage and extending longitudinally of the cross-section, and an extendedsurface tube disposed above the burner and also extending longitudinally of the cross-section and being inclined slightly upwards from one end of the tube to the other, the width of the upright passage immediately above the tube being smaller than the overall external width dimension of the extended surface tube, the ends of the tube being brought out of the passage for connection to flow and return pipes of a circulatory hot water system. The water to be heated passes through a tube 18 having annular or helical fins and sloping upward from inlet to outlet to promote natural circulation. The finned tube 18 may be of copper with a protective coating of lead-tin alloy. Alternatively, aluminium fins may be bonded to a copper tube. The gas burner head 24 is preferably inclined so as to be parallel to the axis of the tube 18. The casing is open at its lower portion 14 for entry of air. The upper portion 13 comprises side walls 16 having inclined skirt portions 15, the upper and lower edges of the side walls and skirt portions being parallel to the inclined tube 18. A lining 19 of refractory material, e.g. ceramics, is shaped as shown and fits the fins of the tube 18 closely at 22, the portion 23 above the tube being narrower.
Patent GB-1228214-A (GB)
IPC: B42F15/06
Filed: 1968-04-16
Abstract: 1,228,214. Filing cabinets. OTTO KIND G.m.b.H. 16 April, 1968 [8 Nov., 1967], No. 17801/68. Heading B6E. A filing cabinet 1, Fig. 1, for storing suspended drawings on spaced pins 9, which extend in a staggered formation transversely of displaceable racks 4 to 7, is provided with a hinged cover 3 and a front wall 2, the latter having a catch device 12 provided with catch bars 13 which then displaced into aligned openings 14, Fig. 6, of webs 10 on which the racks are supported, draw the thus engaged racks forwardly with the pivotal front wall 2 to displace the pins 9, away from one another, such that selected drawings may be removed from the pins or replaced on the pins for suspension. Each rack 4 to 7 is mounted on webs 10 which are fast with the ends of the racks for sliding movement on rollers 11 journalled freely rotatably on the side walls of the cabinet, rearward movement of the racks being limited by a catch 25 integral with the webs 10 and co-operating with a cabinet mounted stop 19 and inadvertent forward movement of the racks is prevented by a latch 18 whose stopping lug 21 co-operates with the opposite face of the stop 19. The pivotal downward movement of the latch 18 is prevented by a lug 22 which abuts the upper edge of the web 10, whereby the latch is released by cam surfaces 23, Fig. 7, on the free ends of the catch bars 13, which are displaced into a selected number of the webs 10 associated with the respective racks 4 to 7 by depression of an operating handle 12 provided along its length with notches (not shown) which are associated with the respective racks 4 to 7. Pivotal movement of the front wall 2 is limited between an inspection position and a drawing removal and replacement position, in which the selected racks are moved away from one another, by a locking pawl 15, Fig. 1, having a respective pair of locking lugs 17, 17<SP>1</SP>.
Patent GB-1229959-A (GB)
IPC: G01M17/02
Filed: 1968-06-14
Abstract: 1,229,959. Dynamometers. F. G. MILES ENG. Ltd. June 14, 1968, No.28589/68. Heading G1W. Apparatus for measuring the braking force or drag between a surface and a wheel running thereupon comprises a test wheel 60 rotatably mounted on an arm 61 which is pivotally mounted on a framework 10 and a load cell 70 supported between the arm 61 and framework 10 and responsive to relative displacement therebetween due to the reaction between the wheel 60 and the running surface. The framework 10 of steel includes upper and lower pairs of tubular members 15, 16 bolted to front and rear frames with pairs of uprights 11, 13 and cross members, all of channel form. Extensions welded to the uprights 13 support a horizontal rod on which the bifurcated arm 61 carrying the wheel 60 is pivoted. Weights 27 are mounted on a load frame 21 pivotally bolted at 24 to the uprights 11, suspended by rubber cord springs 33 from plates 35 welded to the uprights 13 and also coupled to the framework 10 through a shock absorber 30. The load frame 21 also carries a vacuum servo with integral tank 50 and a solenoid valve 51 whereby a wheel brake 66 and anti jackknife brake 81 may be controlled from a vehicle 2 towing the framework 10, as a trailer, through linkage 80. Drag measurements can be made with the brake 66 off, partially applied or locking the wheel to test different combinations of tyre materials and running surfaces, including grass and conditions of slush. The load cell 70 may include an electric strain gauge, hydraulic pressure capsule or a restraining spring and extensometer and a signal representing the force sensed by the cell may be transmitted by a cable 73 to a chart recorder 74 on the vehicle 2, where the speed of the wheel sensed by a tachometer 69 may also be monitored. A castor wheel 40 on the load frame 21 may be lowered to support the trailer 1 instead of the wheel 60 when manoeuvering.