baber/WOPTO huggingface dataset:
Patent CN-1065225-A (CN)
Title: 包覆的粒料、特别是铸造用过的旧砂的再生方法
Inventor: FEDERHEN BERND
IPC: B22C5/04
Filed: 1992-03-27
Abstract: 一种再生具有不规则表面的包覆颗粒、特别是包
覆上一层粘结物或类似物外壳的铸造用砂粒的方法，
所述外壳通过摩擦打开，其中准备再生的砂粒以摩擦
方式与颗粒擦净剂接触，该擦净剂的粒径基本上小于
砂粒的粒径。
Patent CN-1088932-A (CN)
Inventor: MALABARBA ADRIANO
IPC: C07G11/00
Filed: 1993-01-01
Abstract: 本发明涉及一种新颖的抗菌素A40926衍生物，
其特征为在N-酰基氨基葡糖醛酸基团上具有羧基，
(C 1 -C 4 )烷氧羰基，氨基羰基，(C 1 -C 4 )烷基氨基羰
基，二(C 1 -C 4 )烷氨基羰基或羟甲基取代基，以及在
分子的63位上具有羟基或聚胺取代基。本发明化
合物在体外实验中显示出高的对糖肽耐药的肠球菌
及葡萄球菌的活性。
Patent CN-1111025-A (CN)
Inventor: SEO YOSUKE
IPC: G11B21/10
Filed: 1994-07-21
Abstract: 本发明涉及在磁盘驱动器中记录伺服模式的方

法和利用该方法的磁盘驱动器。将在磁盘的至少一

部分上已经记录了时钟信号的磁盘装入磁盘驱动

器。利用数据记录/再现磁头从磁盘读出时钟信

号。利用记录/再现磁头根据读出的时钟信号进一

步记录伺服模式。
Patent CN-1137022-A (CN)
Title: 稀土-zsm5/zsm11共结晶沸石
Inventor: QINGXIA WANG
IPC: C07B37/02
Filed: 1994-12-30
Abstract: 一种含有稀土并具有ZSM5与ZSM11共结晶结构的沸石，其中具有ZSM5晶相结构部分与具有ZSM11晶相结构部分的重量比为0.05～20，其无水状态的合成原型具有如下的、以氧化物摩尔比形式表达的化学组成式：0.1～1.0Na 2 O·0.01～1.0RE 2 O 3 ·Al 2 O 3 ·20～300SiO 2 ，该沸石的钠型具有如表1所示的X光衍射谱线。该沸石具有良好的酸性水热稳定性和抗杂质污染能力，可用于多种烃类转化过程的催化剂。
Patent CN-1180634-A (CN)
Inventor: LIANG PING
IPC: B63B35/00
Filed: 1996-10-24
Abstract: 本发明公开了一种深海集散式采矿系统,该系统包括集矿机(3)、输送管(2)、水上船只/水上平台(1),输送管(2)的上端与水上船只/水上平台(1)相连,下端设有中转仓(4)伸入水中距洋底一定高度,集矿机(3)与输送管(2)间为分体式,集矿机(2)自带动力和行驶装置、浮力调节装置,悬浮于洋底表面按各自预定的路径行驶集矿。本发明具有采集效率高、集矿机机动性大、生产作业率高、生产风险分散、对海洋环境影响小等优点,可用于深海锰结核等矿产资源的开采。
Patent CN-1217567-A (CN)
Title: 在化学敏感型光刻胶上形成图形的方法
Inventor: KEN YOSHII
IPC: G03F7/40
Filed: 1998-11-05
Abstract: 一种在化学敏感型光刻胶上形成图形的方法,其包括下列步骤:用KtF激光器将光刻胶膜进行曝光,将曝光的光刻胶膜进行显影以形成光刻胶图形,将保护基团与光刻胶图形分离,和将光刻胶图形进行加热使光刻胶图形具有膨胀特性,由此在减小开孔尺寸的同时使光刻胶图形上的开孔再成形。该方法可获得0.30—0.18μm设计规则的精细图形而不会破坏其形状。
Patent CN-1241078-A (CN)
Title: 异步传输模式交换电路及其控制方法
Inventor: MIZUKOSHI NOBUYUKI
IPC: H04L12/28
Filed: 1999-02-23
Abstract: 在ATM(异步传送模式)交换电路中,即使在增加输出端的总数时也能提高地址存储器的使用效率。该ATM交换电路由一个ATM信元缓冲存储器,一个ATM信元管理单元,一个地址存储器,一个空地址管理单元,以及一个缓冲地址管理单元构成。在该ATM交换电路中,可相对于输出端共同使用地址存储器。结果是,由于可以根据输出端的使用频率调节与输出端对应的地址链的长度,可依据多个输出端有效地使用地址存储器。
Patent CR-20160075-A (CR)
Title: Derivados de etinilo
Inventor: BIEMANS BARBARA
IPC: C07D513/04
Filed: 2016-02-16
Abstract: La presente invención se refiere a compuestos de fórmula I, en la que: Yes N o C-R1', Ges un anillo aromático o heteroaromático de 5 ó 6 elementos que contiene 0, 1, 2 ó 3 heteroátomos, seleccionado de entre el grupo que consiste de fenilo, piridinilo con diferentes posiciones de N, imidazolilo, pirazinilo, pirimidinilo, tiofenilo, tiazolilo, pirazolilo o tiadiazolilo
Patent CR-20180555-A (CR)
Title: Características de estabilidad en un montaje de miembros de desgaste
Inventor: BILAL MOHAMAD;
IPC: E02F9/28
Filed: 2017-05-11
Abstract: Un montaje de miembro de desgaste puede incluir una nariz que se une al canto de la pala. La nariz puede incluir una parte trasera que tiene un primer conjunto de superficies sustancialmente planas que incluyen un primer, segundo y tercer subconjunto de superficies. El tercer subconjunto de las superficies puede estar inclinado y estar posicionado entre el primer subconjunto de superficies y el segundo subconjunto de superficies. La nariz puede además incluir una parte delantera posicionada en superficies adyacentes hacia adelante a la parte trasera, la parte delantera que tiene un segundo conjunto de superficies sustancialmente planas que incluyen un cuarto, quinto y sexto subconjunto de superficies. El sexto conjunto de superficies puede estar inclinado y estar ubicado entre el primer subconjunto de superficies y el segundo subconjunto de superficies. El montaje de miembro de desgaste además incluye un miembro de desgaste que tiene una cavidad que comprende superficies de rodamiento delanteras y traseras correspondientes con el tercer y sexto subconjunto de superficies.
Patent CR-20190415-A (CR)
Title: Portable device and methods for efficient production of microbes
Inventor: DIXON TYLER
IPC: C12N1/20
Filed: 2018-02-12
Abstract: Provided are devices and methods for producing microbe-based compositions that can be used in the oil and gas industry, environmental cleanup, as well as for other applications. The devices and methods can produce scalable, submerged yeast cultures for inoculating larger-scale, on-site fermentation systems. A device can include a rotatable drum mounted on a support frame and a motor connected to the drum and causing the drum to rotate.Se proporcionan dispositivos y métodos para producir composiciones a base de microbios que se pueden usar en la industria del petróleo y el gas, la limpieza ambiental, así como para otras aplicaciones. Los dispositivos y métodos pueden producir cultivos de levadura sumergidos, modificados a escala, para inocular sistemas de fermentación en el sitio a mayor escala. Un dispositivo puede incluir un tambor giratorio montado en una estructura de soporte y un motor conectado al tambor que ocasiona que el tambor gire.
Patent EC-SP066668-A (EC)
Title: Un surtidor convertible para material de hoja
Inventor: WELCHEL DEBRA N
IPC: A47K10/32
Filed: 2006-06-22
Abstract: Se proporciona un surtidor el cual está adaptado para el surtido desde un mostrador y que puede convertirse para surtir desde un accesorio de producto enrollado convencional. El surtidor incluye una caja que tiene un compartimento configurado para contener hojas. La caja también tiene una abertura surtidora. La caja está configurada para ser colocada sobre un mostrador para surtir hojas desde la misma y la caja incluye una lumbrera colgadora que permite a la caja el ser acoplada a un accesorio de producto enrollado convencional. La lumbrera colgadora está enmascarada cuando el surtidor es colocado para el surtido desde un mostrador. La lumbrera colgadora es fácilmente desenmascarada y configurada para acoplar en forma liberable la caja a un accesorio en un cuarto de baño para el surtido de hojas desde la misma.
Patent EC-SP982503-A (EC)
Title: Componentes pesticidas, composicion y proceso para la preparacion de los mismos
Inventor: ARVAI GEZA
IPC: A01N27/00
Filed: 1998-05-13
Abstract: Isómero óptico (+), mezcla de isómeros rica en el isómero óptico (+) del compuesto de ingredientes de alquinilo de fórmula I.
Patent FR-1600746-A (FR)
IPC: D04B23/08
Filed: 1968-12-12
Granted: 1970-07-27
Abstract: 1297773 Knitting g MANUFACTURES JEAN-BAPTISTE MARTIN JEAN MARTIN ANDRE CHARBIN & CIE 3 Dec 1969 [12 Dec 1968] 58950/69 Headings D1C and D1K Pile threads 18 for a warp pile fabric preferably knit on a two bed machine are pushed below the needle latches by a vertically movable yarn guide bar 19. In the preferred machine, the pile threads are lapped around needles of the two beds alternately. The needles knit warp chains which are interconnected wefts to constitute ground fabrics. The pile threads may be cut between the two ground fabrics.
Patent FR-1600999-A (FR)
Title: Termination box for polyethylene-insulated - high voltage cable
IPC: H02G1/14
Filed: 1968-12-30
Granted: 1970-08-03
Abstract: Closure lobe surrounds the end of the conductor and is wound from a polyethylene strip. The lobe is welded to the insulation as a body without empty spaces. Pref. the lobe is prefabricated, linings in it control the electric field and are of electrically conducting polyethylene composition; they are welded to the insulating body of the lobe, and are pref. of radiation cross-linked polyethylene. The filler medium is silicone rubber.
Patent FR-1604351-A (FR)
Title: Measuring neutron characteristics of - material surrounding a well bore
IPC: G01V5/10
Filed: 1968-04-09
Granted: 1971-11-08
Abstract: The logging method consists of irradiating the material with neutrons during at least two spaced intervals and detecting the neutron concentration in the material during the intervals. A neutron characteristic is determined for the material from the detected indications during at least one interval. The variable time of at least one interval is controlled in accordance witht he neutron characteristic.
Patent GB-1013386-A (GB)
IPC: A61Q15/00
Abstract: 1,013,386. Aerosol compositions. UNILEVER Ltd. April 30, 1963 [May 1, 1962], No. 16970/63. Heading C4X] [Also in Division A5] An antiperspirant powder spray composition capable of being dispensed in aerosol form to provide a substantially dry product on the skin comprises an aluminium compound in fine particulate form dispersed in a liquefied gaseous propellant containing dissolved therein a minor amount of an aliphatic alcohol containing up to four carbon atoms as a dispersing agent. The composition may also contain isopropyl myristate, isopropyl palmitate, propylene glycol mono-oleate or stearyl palmitate as additional dispersing agent; a germicide and a perfume may also be included. Suitable propellants are the halogenated hydrocarbons. The aluminium compound may be the chlorhydrate, sulphate or chloride.
Patent GB-1047387-A (GB)
IPC: F01C19/10
Abstract: 1,047,387. Rotary-piston I.C. engines. MOTORRADWERK ZSCHOPAU VEB. Aug. 20, 1963, No. 32917/63. Heading F1F. In a rotary-piston I.C. engine having a piston or rotor 2 disposed in a casing 1, radial sealing strips 4 penetrate into a slot in each of two axially movable sealing bolts 3 positioned in coaxial spaced relationship, a fixing pin 6 being inserted in each of the sealing bolts such that side sealing strips 5 of the rotor are contiguous to said fixing pins.
Patent GB-1050698-A (GB)
IPC: G21C15/04
Abstract: 1,050,698. Fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. Oct. 25, 1963 [Oct. 26, 1962], No. 42178/63. Heading G6C. A nuclear fuel element assembly and associated channel comprises cross members supporting and locating a number of fuel elements in a cross-section of the channel. The reactor is gas cooled and has a solid moderator in which the fuel channels are formed by channels formed by the absence of a column of moderator blocks; thus the graphite jacket 2 which extends integrally through the core is surrounded by a number of graphite moderator block columns 2a, 2b, &c. The two fuel rods have herring bone pattern fins and are supported by members 9 and 13 which engage slots in the fuel element cans. The support members 9, 13 may be of short axial length, or they may extend the full length of the fuel channel to divide it into separated coolant flows of enhanced turbulence. The support members may be metal, or moderating material, and the fins may be of various other forms, e.g. helical. Two further embodiments are described (Figs. 3 and 4, not shown) for three and four element assemblies, the latter including an axially extending spider which assists the supports already described. In all embodiments the support members may be rigidly secured to both the fuel elements and the jacket.
Patent GB-1051542-A (GB)
IPC: B23P19/08
Abstract: 1,051,542. Making nuts. PENN ENGINEERING & MANUFACTURING CORPORATION. May 13, 1964 [Feb. 20, 1964], No. 19952/64. Heading B3A. [Also in Division F2] In a method of making a self-locking nut the body 14 is machined to provide an integral extension, Fig. 2 (not shown), including a flange 74 and an integral seat 33, the flange including a cylindrical part 70 and a truncated conical part 72. The flange is rolled about an arbor 80 having flat sides, Fig. 4 (not shown), to produce flats 44 and recesses 48 on the inner wall 40, Fig. 13 (not shown), the flange material being compressed against the arbor to a greater degree nearer the open end by means of the roller 90 and rotation of the nut blank. The resilient locking ring 31, Fig. 8 (not shown), is sheared from material in sheet form by a punch 125 having a larger size than the end of the flange 74 and by pressing the ring material against the end of the flange and bending the flange radially inwards by an annular closing punch 140, Fig. 11 (not shown), to compress the ring and bias it towards the seat 33.
Patent GB-1052422-A (GB)
IPC: B65H23/188
Abstract: 1,052,422. Automatic control of print register. SIEMENS-SCHUCKERTWERKE A. G. Sept.24, 1963 [Sept. 29, 1962], No.37628/63. Heading G3R. In an automatic system for controlling registration in a multi-colour printing press, in which errors appear as pulses of varying area, the pulses are integrated and correction applied only when a pre-determined total is reached, thus avoiding continual adjustments due to small random errors. Registration signals PJ1 and PJ2 Fig. 1, (not shown) trigger bi-stable flip-flop circuits 2, 3, which are reset by a cylinder signal VJ once per revolution. Time differences are detected by a comparator 6 which produces pulses of constant height whose length and sign represent the product of registration error and cylinder speed, and its sign, respectively. The height of the pulses is then modulated by cylinder speed at 7 so that their area is now proportional to actual error. There are two pulse lengthening stages 8, 10, with variable RC circuits 9 to produce a zone of insensitivity around zero error. 13 is the integrator and threshold detection stages and comprises conventional transistor amplifiers with capacitance in the feed-back. The threshold value is determined by a bias voltage. 11 and 12 are output stages which operate servomotors. The threshold detector produce an output pulse when the summed errors reach the preset value, and they also reset the integrator. Thus, normally, pulses of equal length but of a repetition frequency dependent on degree of error are produced. If the individual errors are greater than the threshold value the pulses are lengthened until in the limit the correcting servomotor runs continuously. The integrator is effectively decoupled from the input circuit at zero signal level by pairs of diodes Fig. 3, (not shown).
Patent GB-1084314-A (GB)
IPC: F01B3/00
Abstract: 1,084,314. Reciprocating pumps and motors. VICKERS Ltd. April 24, 1964 [April 30, 1963], No.17036/63. Heading F1A. In an axial piston pump or motor having a cylinder block 6 fixed for rotation with the shaft 8, the cylinders 7 communicate with an inlet and outlet in the casing part 4 via arcuate ports 28 in a valve plate 18 and sleeves 20 mounted in recesses in the casing part and valve plate. The plate 18 is mounted on the sleeves 20 to permit alignment with the face of the cylinder block 6 and the recesses 19 in the valve plate and the cylinders 7 are dimensioned to provide hydraulic balance of the valve plate in a pump or motor having an even number of cylinders. In a pump or motor having an odd number of cylinders a pair of recesses (30), Fig. 5 (not shown), containing pistons (29), are provided in the bridge portions between the pair of arcuate ports on the valve plate side adjacent the inlet and outlet casing part (4). The recesses (30) communicate with the valve surface of the plate (18) through bores (31), Fig. (not shown), and the dimensions of the cylinders and recesses (19 and 30) are such as to provide hydraulic balance of the plate.
Patent GB-1225652-A (GB)
IPC: C07F9/34
Filed: 1968-06-06
Abstract: 1,225,652. Halomethyl methylphosphinic halides. STAUFFER CHEMICAL CO. 6 June, 1968 [6 July, 1967], No. 27013/68. Heading C2C. A monohalomethyl methylphosphinic halide having the formula wherein X is chlorine or bromine, is prepared by reacting phosphorus trichloride or tribromide with dimethyl ether in the vapour phase at a temperature of between 400 and 750 C. in a non-oxidizing medium. The phosphorus trihalide and dimethyl ether reactants are preferably present in a molar ratio of from 0.1:1 to 10:1.
Patent GB-1228159-A (GB)
IPC: B23K33/00
Filed: 1967-08-21
Abstract: 1,228,159. Welding by fusion. FIRTH BROWN Ltd., and H. W. KIRKBY. 5 Nov., 1968 [21 Aug., 1967], No. 38484/67. Heading B3R. In a turbine rotor wherein adjacent turbine discs are welded together to form the rotor shaft, a thin "buttering" layer of metal is secured, before welding, to each of the surfaces to be welded together, by explosive welding. The "buttering" layers tend to reduce faults, such as cracking, in the weld zones. Each buttering layer is of similar metal to that used for welding and is in the form of a wrought ring or plate. After buttering, each mating face is machined to a contour suitable for welding by methods such as argon-shielded arc, consumable electrode, submerged arc, electro-slag or combinations thereof. As shown, buttering layers are explosively welded to faces 18-25 of singlestage turbine discs 11, 12, 13 and softened or suitably heat-treated alloy steel end forgings 16, 17. In Fig. 5 (not shown), each turbine disc has more than one stage. The steel compositions of the various discs may differ.
Patent GB-1229383-A (GB)
IPC: F16L33/025
Filed: 1969-09-30
Abstract: 1,229,383. Hose clips. H. GERLACH. 30 Sept., 1969 [31 Oct., 1968], No. 48015/69. Heading E2B. An annular hose clip comprises a number of identical component parts 4, on one end portion of each of which a loop portion 2 is formed, the parts being connected to one another so that the other end portion 3 of each part 4 lies under the loop portion 2 of the adjacent component part. The adjacent parts are connected by a rivet or spot weld 5. The loop portions 2 are deformed to secure the hose clip to a hose.
Patent GB-1233493-A (GB)
IPC: G02B5/22
Filed: 1969-09-11
Abstract: 1,233,493. Glass composition. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 11 Sept., 1969 [14 Sept., 1968; 10 May, 1969], No. 44950/69. Heading C1M. A glass consists essentially of, in weight per cent, SiO 2  60-70 B 2 O 3  0-2 Li 2 O 0À5-2 Na 2 O 10-16 K 2 O 0-2 BaO 6-16 Al 2 O 3  1-4 CaO and/or MgO 0-5 FeO 2-4. The glass is infra-red absorbing, and may be used as envelopes for reed contacts in a hydrogen atmosphere. The contacts having lead-in wires of nickel-iron or copper coated nickel iron were sealed into tubular envelopes of the glass using infra-red radiators.
Patent GB-1233542-A (GB)
IPC: B60J10/02
Filed: 1967-05-26
Abstract: 1,233,542. Glazing windscreens. BITUMEN INDUSTRIES Ltd. 26 Aug., 1968 [26 May, 1967], No. 24551/67. Heading E1R. In the case of a windscreen 56 which is inserted in the frame of a vehicle by positioning a preformed strip 50 of heat curable material having an electrical heating wire 52 enclosed therein between the frame 54 and the glass screen 56, passing current through the conductor 52, pressing the screen and frame together while the material 50 is soft to effect a bond between frame and screen, a trim strip 32 is arranged to cover the gap between the edge of the screen and frame by inserting in the gap, before the material 50 is fully cured, a plurality of clipping members 10 of stiffly resilient material e.g. nylon, polystyrene polypropylene, cellulose acetate, butyrate and P.V.C., presenting to the gap, the trim strips 32 of some material having a rib with an enlarged head 42 and pressing the enlarged head 42 into the undercut grooves 12 of the clipping members so as to wedge the clipping members in the gaps.
Patent GB-1239584-A (GB)
IPC: B60K25/00
Filed: 1968-10-26
Abstract: 1,239,584. Units attachable to tractors. R. POWELL. 12 Dec., 1969 [26 Oct., 1968], No. 50925/68. Heading A1P. A unit connected at 21 to the hydraulic lift links 22 and at 23 to stabilizing bars 24 of a tractor, comprises a compressor, vacuum pump 12a or an electrical generator 45 (or any combination thereof) driven by the power-take-off shaft 17 of the tractor, the assembly resting on the ground during use and being raised for transport. The shaft 17 is connected to a universally-jointed shaft 16 adjustable in length and connected to a shaft 15. The shaft 15 carries a duplex pulley or sprocket wheel 18 engaged by V-belts or chains driving the reciprocating or rotary pump 12a and the generator 45. The vacuum pump 12a may be used to operate milking machines and is then connected to a trap 31 which prevents flow of milk to the pump, and the vacuum is controlled by a valve 33. A pressure tank may be provided for the pump. A tread plate 27 shields the pulleys.
Patent GB-1250527-A (GB)
IPC: F28F21/02
Filed: 1968-10-23
Abstract: 1,250,527. Heat exchangers. V. G. ILIN. 23 Oct., 1968, No. 50241/68. Heading F4S. A heat exchanger for condensing vapour comprises a plurality of vertically stacked blocks 1, 1a 1b, 1c of a graphite-based material each having vertical and horizontal channels 2, 3 for the passage respectively of vapour and cooling agent. The upper part of each block has a series of inclined grooves 12 to receive condensate formed in the vertical channels 2 of the preceding block and to pass it into a collecting groove 13 from whence it is discharged downwardly through additional vertical channels 14 into the next lower block. The vertical channels 2 of e.g. block 1 are offset relative to the vertical channels 2 of block 1a which in turn are offset relative to those of block 1b (see Fig. 2, not shown). Vapour to be condensed enters the heat exchanger at 4 and the condensate formed leaves at 5. The cooling agent enters at 6 and leaves at 7, a series of cover members 10 and associated partitions 11 defining the flow path for the cooling agent between adjacent heat exchange blocks 1c, 1b etc.
Patent GB-1252567-A (GB)
IPC: B61F5/22
Filed: 1968-12-13
Abstract: 1,252,567. Vehicle suspension systems. KNORR-BREMSE G.m.b.H. 13 Dec., 1968 [15 Dec., 1967], No. 59389/68. Heading B7L. The air bellows 1 and 2 arranged on opposite sides of the vehicle are connected to a compressed air source (not shown) via level-control valves 7 and 8 arranged on the sprung part of the vehicle and having operating levers 9 and 10 articulated to unsprung vehicle parts so as to supply air to (or exhaust air from) the bellows when rotated to maintain the vehicle at a constant level while the vehicle is travelling along a straight track section; in transition sections leading to curves, one or other of the air bellows 1 and 2 is supplied with air from a compressor 28 which draws the air from the other bellows, so as to roll the vehicle about a longitudinal axis (increasing velocity of angular rotation of vehicle about a vertical axis); in curves of constant radius, the angle of roll is maintained (velocity of angular rotation constant); in transition sections leading from curves, air is supplied from the extended bellows to the retracted bellows to level the vehicle (decreasing velocity of angular rotation). The bellows 1 and 2 are connected to the compressor 28 via two-way solenoid valves 18 and 19, 23 and 22 (alternatively these may be shut-off solenoid valves) controlled electrically by a control unit 52 comprising an instrument responsive to angular velocity and acceleration, or inclination of the vehicle body, and/or a device actuated by track-side controls, so that on straight track sections the compressor draws air from atmosphere at 37 and vents to it at 38, but in transition sections e.g. approaching a right-hand curve, control lines 47, 49, 50 are energized thus closing shut-off valves 5 and 6 which isolate the level-control valves 7 and 8, switching over the two-way valves 23 and 22 and opening a shut-off valve 24. Air is drawn from the bellows 2 (on the inside of the curve) through pipe-line 15, twoway valve 23 and pipe 27 to the compressor which delivers it through pipe 29 two-way valve 22 and pipe-line 14 to the bellows 1. In the righthand curve, the control line 49 is de-energized and pipes 27 and 29 are connected to atmosphere. A further level-control valve 43 opens to feed air from pipe-line 44 to pipe-lines 39 and 40 and via the open valve 24 to the extended bellows 1 to compensate for body lowering during rolling. On leaving the right-hand curve, the control line 48 is energized and the two-way valves 18 and 19 switch over and air is drawn from bellows 1 and delivered to bellows 2. The compressor is driven from a vehicle wheel 46 via a clutch 45 which closes only when the speed of the vehicle exceeds a certain speed.