baber/WOPTO huggingface dataset:
Patent GB-1535114-A (GB)
Title: Hydraulic system for controlling a gang of lawn mowers
IPC: A01D75/30
Filed: 1976-09-07
Abstract: 1535114 Gang mowers JACOBSEN MFG CO 7 Sept 1976 [1 Dec 1975] 37064/76 Heading A1F Gang mowers 18 are hydraulically driven by motors 12 and are lifted by rams 13, a plurality of spool valves 41 in a common housing acting to control the supply of hydraulic fluid from pumps 37. As shown, the left hand pump and spool valve control three central mowers and their lifting rams whilst each of the other mowers is controlled individually by a separate spool valve and pump. The spool valve is shown in the neutral position; it is moved upwardly by hand lever 42 for the raise position and downwardly for the lower position. In the lowermost position of the spool the motors 12 are operated through a proportionator 79 and manually controlled reversing valves 47 whilst poppet valve 46 releases check valve 44 in the line to rams 13 so that the mowers float in operation. In an embodiment the motors controlled by the left hand spool valve are connected in series so that the proportionator 79 can be omitted and the reversing valves 47 are electrically controlled.
Patent GB-1275258-A (GB)
Title: Reinforcing materials
Inventor: YOUNG MAURICE ALFRED
IPC: B60C9/00
Filed: 1968-08-03
Abstract: 1275258 Reinforced resin compositions DUNLOP HOLDINGS Ltd 4 Aug 1969 [3 Aug 1968] 37149/68 Headings C3Q and C3R [Also in Division D1] A reinforcing material comprises chopped bundles of brittle filaments impregnated with an elastic solid having a Poisson's ratio #0À45 at strain #5%. The filaments have a specific modulus #200 Î 10<SP>6</SP> inch, and may be of B, SiO 2 , SiC, Si 3 N 4 , carbon, or graphite. The elastic solid may be a cross-linked resorcinol-formaldehyde latex (RFL) adhesive composition, e.g. an aqueous dispersion of RFL and natural rubber, or RFL and resin vinyl pyridine and butadiene rubber; or cis-polyisoprene in n-hexane with dicumyl peroxide as curative; or liquid polyurethane; or plasticized P.V.C. The impregnated bundles may be twisted before or after the liquid is converted into an elastic solid or after drying but before cross-linking. The mean helix angle of the filaments > 20 degrees with regard to yarn axis. The chopped bundles may be formed by impregnating yarn, e.g. of 10,000 filaments, solidifying or curing, and chopping, e.g. into lengths of “-2 inches. They may be mixed into rubber preferably of hardness >60 B.S.D., which may contain adhesion boosters of the formaldehyde generator type. There may be 5-150 parts by wt. of filaments per 100 parts rubber.
Patent GB-449759-A (GB)
Title: Improvements in or relating to building structures suitable for roofs, walls and the like
IPC: A61M11/08
Filed: 1934-12-28
Abstract: 449,759. Sheet - metal roofs and walls. SCHADLER, F. A., Arbon, Switzerland. Dec. 28, 1934, No. 37219. Convention date, Jan. 10. [Classes 20 (iv) and 87 (i)] A roof, wall, or like structure consists of main beams A co operating with double cased metal plates D wherein the plates bridge over the spaces between the beams and bear loosely or lateral flanges 3 of said beams and con sist of inner and outer metal sheets 6, 7 anc cross beams 8 arrangec between the sheets anc bearing at their ends on the flanges 3. The edges of the sheets 6, 7 are upturned and folded together at 10 preferably with insulating material in between. The sides of the sheets perpendicular to the beams may also be folded or may be riveted to a close-fitting cross beam. The space between the sheets 6, 7 may be filled with peat. If desired the beam A may form the upper boom of a principal truss or girder, the lower boom B being of inverted U-shape 15 with a covering plate 17. Supplementary enclosing plates E, E<1> are added. The web portion C of the girder may be solid or in lattice form, upper and lower booms being recessed to receive the web.
Patent GB-523202-A (GB)
Title: Improvements in or relating to containers, particularly for foodstuffs, and to closure devices for such containers
IPC: B65D53/02
Filed: 1938-12-28
Abstract: 523,202. Closures for containers. CHIVERS & SONS, Ltd., and FISON, F. J. Dec. 28, 1938, No. 37641. [Class 125 (iii)] In a closure for a container, different portions of. coacting surfaces between the container and the cover provide seals against internal pressure or vacuum. The metal container A, Fig. 1, receives a lid or cover B with a depending flange B<SP>1</SP>; the middle part of the cover-is preferably dished so that an inverted channel is formed between the inner wall of the lid and the flange. The upper edge of the container is rolled or beaded, and an annular projection A<SP>2</SP> of obtuse V-shaped section is also formed by a wheeling process. After a suitable rubber or composition ring C has been placed in position on the container, or in the-flange B<SP>1</SP> of the lid, this last is put on the container and is formed by a wheeling operation to provide a complementary shape to the container projection A<SP>2</SP>. Seals PS, capable of resisting pressure within the container, are formed by the surfaces sloping inwards below the projection A<SP>2</SP> and also between the rolled edge A' and the flange B', while a seal VS which is effective when a vacuum exists in the container is formed by the parts above the'projection A<SP>2</SP>. A tab C' may be attached to the rubber sealing ring C so that this ring may be pulled away to break the seal and permit the cover to be lifted. More than one projection A<SP>2</SP> may be formed upon the container, and in a modification 'the projection may be inwards instead of outwards. The cover may fit with its sealing ring C inside the container, or, as shown in Fig. 12, the flange B' of the cover may have a circular cross section and fit over the beaded edge A' of the container with a sealing ring C between, thereby forming pressure seals PS and a vacuum seal VS. In a modification the coacting surfaces are screw threads so that the cover forms a screw top. In further modifications the lid is not secured to the container wall, but as shown in Fig. 17 to a flange D' formed on a ring D secured to the top of the container wall. A recess may be formed in the cover or the ring to receive the tab C'.
Patent GB-949289-A (GB)
Title: Joints in pipelines
IPC: F16L21/02
Filed: 1962-10-05
Abstract: 949,289. Pipe seals. STAHL-UND ROHRENWERK REISHOLY G.m.b.H. Oct. 5, 1962, No. 37743/62. Heading F2G. A sealing ring 1 for use in plastic-lined metal tubes is of generally tubular form having outwardly extending flanges 2 in the central portion, the flanges diverging from each other in the uncompressed position. The flanges extend between the ends of two threaded tubes joined by a threaded connecting member 5. When the tubes are drawn together the flanges 2 are forced together and the tubular portion of the sealing ring is drawn to the side of the tubes. The tubular portion of the seal is tapered at 3 to decrease turbulence and in the uncompressed state lies further away from the tubes in its middle portion than at its ends.
Patent GB-915336-A (GB)
Title: Improvements in or relating to methods of forming junctions in silicon bodies
Inventor: LEWIS DAVID THOMAS
IPC: H01L21/00
Filed: 1960-11-03
Abstract: 915,336. Semi-conductor devices. GENERAL ELECTRIC CO. Ltd. Sept. 28, 1961 [Nov. 3, 1960], No. 37848/60. Class 37. In a method of forming a junction in a silicon body by an aluminium alloying process that part of the surface of the body with which the alloying material is to be brought into contact is first treated with a reagent which forms a fresh surface on the silicon and deposits on this a thin film of at least one of the elements copper, silver, and indium. To form a PNP junction transistor a silicon wafer is immersed in a solution of nitric, hydrofluoric, and acetic acids which also contains aqueous copper nitrate, the treated wafer having a surface film of copper. The washed and dried wafer is placed in a jig with aluminium discs on its opposite faces and with a ring of gold/antimony alloy symmetrically surrounding the smaller of the two discs. Molybdenum thermal compensator discs corresponding in size to the aluminium discs are placed on top of the latter and the assembly heated in a reducing atmosphere to form two substantially plane parallel junctions and a ring-base contact. After etching to remove any residual copper and other surface contaminants the assembly is mounted in a sealed envelope. All or part of the copper nitrate may be replaced by equivalent amounts of silver nitrate or indium sulphate. Instead of using pure aluminium to form the junctions aluminium containing small amounts of elements such as boron and silicon may be used. It is stated that alternatively the alloying material may be melted and then brought into contact with the silicon in the liquid state.
Patent GB-914736-A (GB)
Title: New steroids, their formation and conversion into therapeutically valuable substances
IPC: C07J75/00
Filed: 1960-11-03
Abstract: The invention comprises a compound of the formula:  <FORM:0914736/IV (b)/1> wherein OAc represents an acyloxy radical derived from an organic carboxylic acid, and processes for the preparation thereof by condensing a 1-acyloxy-6-keto-9a-methyl-3a,4,5,7,8,9 - hexahydro - cyclopentano-[2,1-c]-naphthalene with methyl vinyl ketone. Subsequent treatment of the products with an alkali metal alcoholate gives 17b -hydroxy-19-nor-androsta-4,9(10)-dien-3-one, which may be re-esterified at 17-position.  As condensation agent there may be used the sodium derivative of isoamyl ethyl barbituric acid, and as alkali metal alcoholate sodium ethylate may be used.  Heating the 17b -hydroxy or 17b -acyloxy-19-nor-androsta-4,9(10)-dien-3-one in the presence of a catalyst e.g. palladinized charcoal, gives estradiol. Specification 914,737 is referred to.
Patent GB-1190507-A (GB)
Title: External Rear-View Mirror for Motor Vehicles.
IPC: B60R1/06
Filed: 1968-08-08
Abstract: 1,190,507. External rear view mirror. DAIMLER-BENZ A.G. 8 Aug., 1968 [11 Aug., 1967], No. 37917/68. Heading B7J. An external vehicle rear view mirror comprises a foot section 1 securable to the vehicle door 6; and a head section 3, carrying the mirror glass 2; the head section 3 being adjustably attached to the foot section 1 such that when the mirror is mounted on a motor vehicle the point of attachment of the head section is located on the vehicle side of its central vertical axis; the head, in use, being rotatable about a substantially vertical axis 8b of the foot section 1, against the adjustable compression of a helical spring 15 which is sufficient to prevent rotation of the head section due to wind resistance. The head section 3 is attached to the foot section 1 by means of a headed screw 8 held in a tapped hole 16 in the foot section, and passing through the spring 15 and an opening 10 in a ballshaped bearing element 9 in the head section 3. The bearing element 9 engages a ball cup 11 formed on top of the foot section 1.
Patent GB-1060809-A (GB)
Title: Photographic reproduction processes and processing solutions therefor
IPC: G03C5/315
Filed: 1963-09-30
Abstract: 1,060,809. Photographic transfer processes. EASTMAN KODAK CO. Sept. 30, 1963 [Oct. 1, 1962], No.38382/63. Heading G2C. A substantially unhardened (defined as an emulsion containing not more than 0À7 g. of formaldehyde per pound of gelatine) gelatine silver halide emulsion layer is imagewise exposed and treated with an aqueous solution of tripotassium phosphate and an alkali metal salicylate in the presence of both a gelatine tanning developer and a non-tanning developer, contacted with an absorbent surface in the presence of moisture so that the unhardened areas are transferred to the absorbent surface leaving a positive image thereon. The aqueous activator solution may also contain the sodium salt of ethylene diamine tetra-acetic acid and tetraethylene glycol as well as 60-100 gm/litre of tripotassium phosphate and 10-40 gm/litre of an alkali metal salicylate.
Patent GB-1152447-A (GB)
Title: Gyroscope Supporting Device
Inventor: EKLUND HARRY NILS
IPC: G01C19/38
Filed: 1966-09-01
Abstract: 1,152,447. Bearings. LEAR SIEGLER Inc. 1 Sept., 1966 [7 Sept., 1965], No. 38984/66. Heading F2A. [Also in Division G1] A gas bearing for supporting a gyroscope for rotation about a vertical axis is formed between two surfaces 31, 32, a cushion of supporting gas being formed by forced vibration of the surface 32 towards and away from the surface 31. This vibration is effected by means of a transducer 10 comprising a cylinder 11 of piezoelectric material having electrodes to which an alternating voltage is applied. The cylinder 11 acts as a quarter-wave length oscillator and is carried by a backing-plate 12 acting as a further quarter-wavelength oscillator, so that the transducer as a whole acts as a half-wavelength oscillator which is mounted at its nodal point to the casing of the instrument. Examples of suitable piezo-electric materials are given in the Specification and in an alternative embodiment the single transducer 10 may be replaced by three smaller but similar transducers equiangularly spaced around the vertical axis of freedom of the gyroscope. In other alternative arrangements the cylinder of piezo-electric material may be backed by a similar cylinder in place of the plate 12, or discs of piezo-electric material may be provided in place of the cylinder, these either acting directly on the bearing surface, or on a plate which carries the bearing surface and which flexes under the action of the piezo-electric elements. The oscillations of the piezo-electric elements may be utilized in a closed loop feed-back circuit which maintains the oscillations at the required resonant frequency. Furthermore, in place of piezoelectric elements, magnetostrictive, loudspeaker voice coils, reciprocating solenoid magnets or electric motor devices may be used. Movement of the gyroscope about the axis of the gas bearing may be damped by the provision of electric circuitry which cuts down the voltage applied to the piezo-electric elements for predetermined short pulsed periods at a desired frequency so causing the air bearing gap to alternately freely support the gyroscope and brake its movement by friction between the bearing surfaces.
Patent GB-1172821-A (GB)
Title: Improvements relating to Presses for Performing Blanking Drawing and Pressing on Strip Material.
Inventor: NORMINGTON FRANCIS
IPC: B21D28/06
Filed: 1965-09-14
Abstract: 1,172,821. Punching; stamping. METAL CLOSURES GROUP Ltd. 2 Dec., 1966 [14 Sept., 1965], No. 39265/65. Headings B3Q and B3W. A method of punching blanks from a strip of sheet material comprises moving the strip lengthwise of itself and between successive movements of the strip, moving a punch and die assembly stepwise across the strip along a line which is inclined to the lengthwise dimension of the strip, and performing a punching operation between successive steps of the movement of the assembly across the strip. An apparatus for feeding a continuous strip of material to a punching press and for cutting up the resulting webbing includes a punch press 1 in which are mounted a punch assembly 6 and 7 and a die assembly 8. The punch assembly comprises a double-acting hydraulic ram 19 having a reduced end 20 to which is secured a plate 22 and a punch bolster 23. The punch 25 is retained by a holder 24 and passes through a stripper 26. The ram cylinder 12 is closed at its lower end by a slipper block 11 which slides on bars 10 attached to the side frames 2 of the press. The upper end of the cylinder engages guide bars 28, 28A. The die assembly comprises a die 16 and a bolster 14 which slides on guide rails 13. The punch and die assemblies are slidably connected by guide rods 9, Fig. 2 (not shown). The punch and die assemblies are moved stepwise along their guide rails by a pinion 47 which engages a rack on the underside of the bolster. The pinion is secured to a shaft (48), Fig. 5 (not shown), which is driven in opposite directions by rotary hydraulic actuators (49R and 49L) connected to opposite ends of the shaft by free-wheel clutches (50R and 50L). The strip 17 passes through tunnels 18, 18A through the press side frames. The length of the tunnel is at an angle of 65 degrees to the strip feed direction. The punching head is traversed across the strip by rotation of the pinion after each punching operation. After punching the hole at the edge of the strip the head remains stationary and the strip is moved forward to bring it to a position to punch the first hole of the next row. The punching head is then traversed stepwise in the opposite direction. The webbing remaining after the strip has been punched is cut after each forward movement of the strip by a reciprocating shear blade 35 co-operating with a stationary blade 34 and operated by a fluid cylinder 43. The strip feed mechanism comprises a pair of rolls (44), Fig. 5 (not shown), driven by a rotary hydraulic actuator (141) through a one-way clutch (147). The amount of feed is adjustable by a device (146). The valves controlling the punch ram, the punching head traverse, the feed rolls and the webbing shear are controlled by a cam-shaft (100) driven by a variable speed motor (101) so that the cycle of operations is continuously repeated. The operation of the punching head traversing mechanism is initiated by the return of the punch to its fully retracted position.
Patent GB-1109146-A (GB)
Title: Improvements in or relating to electrohydraulic forming apparatus
IPC: B21D26/12
Filed: 1965-09-15
Abstract: 1109146 Electro-hydraulic forming GENERAL DYNAMICS CORPORATION 15 Sept 1965 [21 Sept 1964] 39361/65 Headings H1A and A4D An electrode assembly in an electrohydraulic forming apparatus comprises coaxial electrodes  (49, 41), Figs. 2 and 5 (not shown) and a plug (131) carried by the electrodes for closing the forming die (25), Fig. 1 (not shown). The apparatus is described in Specification 1109147. Screwthreaded steel rods (111, 115) extend the copper electrodes beyond glass-fibre sleeves (135) in the stainless-steel plug to a point where they are bridged by a vaporizable wire (139) of circular or rectangular cross-section "Mylar" (Registered Trade Mark) tape (107) impregnated with epoxy resin, insulates the central electrode (49) from the annular electrode (51), which is encased in an insulator (117) of polyurethane-epoxy resin. As its upper end the electrode (49) is secured by a  clamp (95) to a plate (91) which is bolted at (93) to the lower half (77) of a further clamp (76, 77) engaging connectors (73) on three flexible cables (21), Fig. 3 (not shown). Each connector (73) grips the braided copper core (55) of a cable which has central insulation (57) and a brass end-plug (59). A similar plate-and-clamp arrangement (97, 83) connects the earth electrode (51) to the outer conductors (63) of the cables (21). The plates (91, 97) are received in recesses in plates (85), (87) that serve to hold the clamps (76, 77, 83) against a central insulating plate (67). A pin (121) locates the insulator (117) in the die-head (41) in which it is fixed by a screw (129), passages (125, 127) supplying water to the die and permitting the escape of air. In a modification for producing a spark discharge Fig. 7 (not shown), the electrodes (149, 155) in a steel or aluminium housing (167), extend through the plug (175) and are separated by insulation (163) having a groove (165) to prevent interference with the spark. The electrodes may be in the bottom die-head. In a further form, a vaporizable wire may extend between an extension of one of the top electrodes and an earthed bottom plate.
Patent GB-1507269-A (GB)
Title: Caster
IPC: B60B33/00
Filed: 1976-09-23
Abstract: The wheel fork (2) and the bearing housing (4) of the castor (1) are formed by a single-component drawn and stamped element. In the bearing housing (4) there is a deep groove ball bearing (5) which is fixed in its position by means of partial headings (13) on the inner wall of the bearing housing (4). A sealing ring (11) which seals the deep groove ball bearing (5) from above is inserted into the bearing housing bore (14). The castor (1) is attached to a vehicle (15) by means of a hexagonal head screw (8) which is guided through the deep groove ball bearing (5). By means of this measure a reduction in the number of components with simultaneous improvement in the mechanical loadability of the castor is achieved. <IMAGE>
Patent GB-1195909-A (GB)
Title: Process for the Production of Cycloacetal Esters and Cycloketal Esters
IPC: C07D319/00
Filed: 1967-08-30
Abstract: 1,195,909. Cycloacetal and cycloketal esters. CHEMISCHE WERKE HULS A.G. 30 Aug., 1967 [31 Aug., 1966], No. 39676/67. Addition to 1,166,636. Heading C2C. Cycloacetal and cycloketal esters of the formula wherein n is 1 or 2, k is 1-8, p is 0 or 1-8, m is 0 or 1-14, p + m being at least 1, R, R<SP>1</SP> and R<SP>2</SP> represent hydrogen or a hydrocarbon radical optionally substituted by groups which are inert under the reaction conditions, and R<SP>3</SP> represents a n-valent optionally substituted hydrocarbon radical or, when n is 2, a direct link, are prepared mixing together a triol of the formula a carbonyl compound R<SP>1</SP>.CO.R<SP>2</SP>, or a polymer thereof which yields the carbonyl compound under the reaction conditions, and an acid R<SP>3</SP>(CO 2 H)n, or the anhydride thereof, and allowing the reaction to proceed with continuous removal of water, an acid catalyst, different from the acid reactant and having a pKa of not more than 4, being present for at least the latter part of the reaction if the acid reactant has a pKa of more than 4. The reaction is preferably effected under reflux at 90-150‹ C. in the presence of a water-entrainer using stoichiometric proportions of reactants. Specified acidic catalysts include H 2 SO 4 , H 3 PO 4 , HClO 4 , BF 3 , AlCl 3 , SnCl 3 , cationic ion-exchange resins, acid-treated Montmorillonite, p-toluene sulphonic and trichloroacetic acids. The addition of a catalyst is not required if the acid reactant is, e.g. trichloroacetic, oxalic or formic acid. Examples relate to the preparation of esters of acetals and ketals derived from triols selected from trimethylolpropane, glycerol and 1,2,6-hexanetriol and carbonyl compounds selectedfromformaldehyde, cyclohexanone, propionaldehyde, iso - butyraldehyde and 2-ethylbutyraldehyde with acids selected from lauric, butyric, benzoic and 2-ethylbutyric acids.
Patent GB-1044520-A (GB)
Title: Improvements relating to electric selector switches
Inventor: MAUNDER JEFFREY ALLEN
IPC: H01H9/00
Filed: 1962-10-19
Abstract: 1,044,520. Regulating switches. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 20, 1963 [Oct. 19, 1962], No. 39699/62. Heading H2B. A selector switch suitable for on-load transformer tap changing comprises two contrarotatable movable contacts 23, 26, arranged to be stepped alternately, each from one fixed contact to the next in opposite rotational directions over two arcuate sets of fixed contacts 1, 3 ... 11, and 2, 4... 10, respectively, between limit positions in one of which they respectively engage fixed contacts 1, 2 and in the other of which they respectively engage fixed contacts 11, 10, the arcuate sets each subtending angles of less than 180 degrees on opposite sides of a central axis. The movable contacts 23, 26, are carried by arms 24, 25, which are contra-rotatable by concentric shafts coupled to a suitable driving mechanism (Figs. 2, 4, not shown). The fixed contacts 1-11 are connected to tapping points on a transformer winding, and arcuate collector bars 21, 22, of the switch are connected to contacts of a high speed diverter switch arranged to selectively connect the collector bars to a load terminal (Fig. 3, not shown).