baber/WOPTO huggingface dataset:
Patent GB-1516691-A (GB)
Title: Colour contrast photographic silver halide film
IPC: G03C7/00
Filed: 1975-06-11
Abstract: 1516691 Colour contrast photographic silver halide material MINNESOTA MINING & MFG CO 11 June 1975 [11 June 1974]  25067/75 Heading G2C A photographic material, for use in radiography, comprises a support and at least 2 negative silver halide emulsion layers one of the layers comprising an emulsion reactively associated with a colourless cyan-forming coupler, and the other, or another. layer comprising an emulsion reactively associated with a coloured coupler having a reactive methylene or methine in its coupling position and having its colour uniparting group attached to the reactive methylene or methine thereof through a splitting- off link, the coloured coupler upon colour development with a p-phenylenediamine developer forming a positive image whose colour contrasts with the negative cyan image, each of the silver halide emulsion layers in the photographic material being sensitive to blue or green light.
Patent GB-1221484-A (GB)
Title: Device for loading and unloading a vehicle
Inventor: KLAUS KASPAR
IPC: B60P1/54
Filed: 1968-05-24
Abstract: 1,221,484. Loading and unloading vehicles. K. KLAUS. 24 May, 1968 [26 May, 1967], No. 25083/68. Heading B8E. A truck 11 has loading/unloading devices 2, 3 at the rear and front respectively of the truck. Each device comprises an arm 16 pivoted to a support 15 which is itself pivotally mounted at 18 on a truck member 19. A piston-cylinder unit 20 controls the pivotal movement of the support 15 and a piston-cylinder unit actuates the arm 16. From this arm is suspended a loadgripping device 1, consisting of a pair of gripping plates 5, 6 pivoted to a centre member 4 and actuated by a piston-cylinder unit 10. The plates 5 and 6 have gripping members 25. In using the device 2 (or 3) a first stack of stones is loaded and deposited at a position 12 on the truck. A second stack of stones 14 is then lifted and lowered beside the stack 12 but the plates 5, 6 remain adjacent the stack 14, Fig. 2. The arm 16 is then lowered, a side 13 of the truck is raised and the truck is ready to move. Stabilizing supports 28, 29 are provided. Only one plate 5 of the plates 5, 6 needs to be pivotable.
Patent GB-584206-A (GB)
Title: Process for the recovery of cassiterite from ores
IPC: B03D1/012
Filed: 1944-12-14
Abstract: In a process for the recovery of cassiterite from an ore, the sulphides (unless present in quantities less than 4 per cent. of the tin present) are first floated and the cassiterite then floated in a liquor having a pH value not higher than 6 with a collector comprising a compound containing in a straight hydrocarbon chain, or a straight portion of a hydrocarbon chain, more than 6 carbon atoms and containing also an So4 or So3 group to which is attached an invisible hydrogen or metal atom.  The sulphides are floated by the use of a xanthate type of reagent and this flotation may be followed by one in an alkaline solution using a reagent of the type described above. The cassiterite flotation may be carried out in two stages in the presence of a collector such as sodium cetyl sulphate at a pH value of less than 4 and the concentrate from the rougher flotation may be leached with acid before the cleaner flotation. The grade of the concentrate may be improved by the addition of sodium silicate. Lead salts may be used as depressants for topaz. Examples of the collector include the following or their salts: primary or secondary alkyl sulphuric acids, anathyl sulphuric acids, alkyl sulphonic acids, sulpho succinic acids, aryl sulphonic acids, sulphonated ethers, N-acyl taurines 2-acyloxy-1 ethane sulphonic acids, carbalkoxy ethane sulphonic acids or glycerol having one primary alcohol esterified by a fatty acid and the other with the carboxyl portion of sulpho acetic acid. Specification 405,163 and the corresponding German Specification 659,431 are referred to.
Patent GB-1475645-A (GB)
Title: Brake pressure warning device
IPC: B60T8/26
Filed: 1975-06-12
Abstract: 1475645 Pressure indicators AISIN SEIKI KK 12 June 1975 [14 June 1974] 25154/75 Heading G1L [Also in Division F2] A warning device for a motor vehicle hydraulic braking system lights a warning lamp 43 in response to a certain pressure differential across a stepped piston 25, mounted in a stepped bone 24 of a housing 12, caused by failure of any of hydraulic lines 17, 16 and 20 connecting tandem master cylinder 13 to front brakes 18 and rear brakes 19 respectively, or alternatively caused by sticking of a proportioning valve 11 incorporated into the housing 12. The pressure differential across piston 25 may cause movement thereof in either direction according to the cause whereupon a camming portion 39 of the piston 25 forces plunger 40 radially outwardly, with respect to the piston, into contact with metallic tube 42 mounted in insulating plug 41. Movement of piston 25 also causes flow of fluid from intermediate chamber 38 through chamber 32 to rear brakes 19 by-passing the proportioning valve 11 and applying full brake pressure to the rear brakes in the event of any malfunction. This is achieved by a sealing ring 30 at the smaller end of piston 25 moving out of a small bore 25 into either of large diameter bores 26 or 24 according to the direction of piston movement.
Patent GB-840011-A (GB)
Title: A railway automatic block signalling system employing track circuits
Inventor: ROUSSEAU EMMANUEL JOSEPH PAUL
IPC: B61L23/16
Filed: 1957-08-09
Abstract: 840,011. Railway automatic block signalling systems. COMPAGNIE DE SIGNAUX ET D'ENTERPRISES ELECTRIQUES. Aug. 9, 1957, No. 25251/57. Class 105. In a railway automatic block signalling system employing track circuits with continuous rails each block section comprises two track circuits operating at high frequencies and between them at least one track circuit of any desired length and operating at any desired frequency. Each track circuit A, B, C; A<1>, B<1>, C<1> has a transmitter E1, E2, E3, &c. at the exit end of the track circuit and a receiver R1, R2, R3 &c. at the entrance end, the receiver, R2 &c., in all track circuits except the one at the entrance end, controlling the transmitter E1, E2 in the preceding circuit as regards direction of train travel. One or more of the receivers such as R1 and B<1>, the entrance end receiver, controls a relay r<1>, which in turn controls the entrance signal 3 to the block when no transmission is received from the associated transmitter, e.g. E1, because of a train in the section B, or A, which short-circuits the transmission of the section the train is in, resulting in the blocking of the transmitters by their adjacent receivers, e.g. through relay contacts or direct application of potentials. The transmitters may comprise pentode or transistor oscillation generators (Figs. 2, 4, 5, not shown). The frequencies employed in each of the track circuits A, B, C, are so determined that the effective lengths of the track circuits A and C do not overlap substantially the effective length of the circuit B and the block section protected by signal 3 is bound by the points of connection to the rails of the receiver R1 and the transmitter E3, with a degree of precision dependent upon the high frequencies employed in track circuits A and C.
Patent GB-777306-A (GB)
Title: Improvements in polymerization of acrylic acid salts and the like
IPC: C08F2/00
Filed: 1955-09-02
Abstract: Polymers are produced by spraying an aqueous solution of one or more water-soluble salts of acrylic, methacrylic, itaconic, maleamic, aconitic and citraconic acids into a heated gaseous medium having a temperature of 300 DEG  to 900 DEG  F. in the presence of an alkali metal or ammonium persulphate catalyst.  Salts speciffied are the ammonium, sodium, potassium, lithium, calcium, magnesium, methylammonium, dimethylammonium, trimethylammonium, benzyltrimethylammonium and beta-hydroxyethyltrimethylammonium salts. Also present may be other monomers such as acrylamide, methacrylamide, N-phenylacrylamide, methyl and ethyl acrylates, ethylene glycol diacrylate and maleamic acid.  The gaseous medium may be air, nitrogen, helium or carbon dioxide.  Polymerization may also be accelerated by the addition of acetamide or the sodium salt of partially hydrolysed polyacrylonitrile.  A dispersing agent, e.g. the sodium salt of an ethylene oxide derivative of a sulphonated octyl phenol, may be present when a monomer is used in a concentration exceeding its solubility in the aqueous medium.  If desired, the monomer solution may be pre-polymerized to a certain extent prior to spray polymerization. The polymers obtained may be added as thickening agents to aqueous dispersions of polyvinyl acetate, polymers of acrylic and methacrylic esters, and copolymers of butadiene and styrene or acrylonitrile.  The polymers may also be used to prevent scale deposition in boilers, in oil-well drilling fluids, as soil conditioners and as flocculants.ALSO:A polymerization apparatus consists of a vessel having a vertical cylindrical wall about 2 1/2 feet in diameter in the upper portion of which is disposed horizontally and concentrically a disc 2 inches in diameter attached to a vertical shaft.  The disc is rotated at about 40,000 r.p.m. by the shaft and monomer solution is fed on to the inner portion of the top surface of the disc by means of small pipe having a split discharge to direct the solution in equal portion on each side of the shaft, at the same time a hot air blast is directed at the top of the disc to effect polymerization.
Patent GB-873514-A (GB)
Title: Improvements in or relating to devices for controlling pressure operated means in fluid systems
IPC: B60T11/34
Filed: 1957-08-09
Abstract: 873,514. Fluid-pressure servomotor-control systems; valves. CITRAIN S.A., ANDRE. Aug. 9, 1957 [Oct. 29, 1956], No. 25276/57. Class 135. [Also in Group XXXIV] Means for providing a progressive control of the pressure of hydraulic fluid applied to a servo-mechanism for the operation of brakes, clutches, couplings, &c., comprises a progressively - opening valve consisting of a tapered closure member 1 housed in a body 2 which has a connection 4 to a source of pressure fluid and a connection 5 leading to an output conduit 11 which connects with the servo-mechanism and has a branch leading by way of an output regulator 12 to a return line connecting with the hydraulic fluid reservoir. The conduit 11 also communicates directly with the reservoir through a conduit 17 and chamber 19 when the valve member is in its raised position to which it is urged by a spring 7. On depression of the valve member 1, e.g. by a pedal, the tapered part of the valve member leaves its seat and the conduit 17 is closed to permit gradual pressurization of the conduit 11. Pressure fluid can escape from the conduit 11 at a rate determined by apertures 14 in a piston 15 of the regulator 12, and when the pressure acting on the upper end of the piston 15 comes into balance with a spring 13 the piston 15 partially obturates an outlet port 16 to provide a leakage flow of constant amount. More than one servo-mechanism, each associated with a separate control valve and regulator, may be operated from a single source of pressure fluid. A construction of control valve is described in which the movable member 1 slides in a pair of coaxial liners in the body 2, the liners being provided with ring-shaped gaskets.
Patent GB-790214-A (GB)
Title: Improvements in blow guns
IPC: B05B1/00
Filed: 1954-09-01
Abstract: 790,214. Manually-actuated valves. BAKER, F. Aug. 11, 1955 [Sept. 1, 1954], No. 25348/54. Class 135. A compressed-air spraying nozzle or blowgun comprises a body with a valve chamber 4 containing an axially movable valve member 11 coacting with a seat 7 between the chamber and a coaxial reduced bore 5 in which an operating stem 12 is slidable. An inlet bore 9 leads to the chamber 4, which is closed by a plug 6, and an outlet bore 10 leads from the bore 5 above the valve seat. The arrangement is such that inlet pressure closes the valve and a spring is unnecessary. In a modification, the inlet and outlet bores 9, 10 are at right angles to each other, the bore 9 opening coaxially into the bottom of the chamber 4. Specification 694,394 is referred to.
Patent GB-589621-A (GB)
Title: Improvements in or relating to the production of building board
IPC: D21J1/16
Filed: 1944-12-18
Abstract: 589,621. Multiply-ply corrugated cardboard. EXPANDED RUBBER CO., Ltd., and COOPER, A. Dec. 18, 1944, No. 25384. [Class 96] Building board of low thermal conductivity and high wet and dry strength is made by soaking corrugated cardboard &c., e.g., passed as two webs 1 through a bath 3, in a binding medium, e.g., phenol- or cresol-formaldehyde syrup, urea- or melamine-formaldehyde glue, polyvinyl chloride paste, natural, synthetic, or reclaimed rubber adhesive, cellulose lacquer, casein glue, carpenters' glue, or bituminous materials, excess being drained or brushed off, and passing the cardboard 1 through a drying chamber 6, heated at 7 and through which air is circulated, the cardboard being cut into sheets and stacked with the corrugations of adjacent sheets at right angles and compressed between the platens of a multi-daylight press with " picture-frame " or distance-pieces to prevent the corrugations being crushed. The press may be heated to cure the resin or vulcanize the rubber. The cardboard &c. may be fireproofed by soaking in borax, ammonium chloride, tricresyl borate, triphenyl borate, or tricresyl phosphate. Urea-formaldehyde may also be added to the paper pulp in the beater.
Patent GB-690129-A (GB)
Title: Improvements in hand-operated engine starting devices
IPC: F02N3/02
Filed: 1950-10-19
Abstract: 690,129. Hand turning-gear VILLIERS ENGINEERING CO., Ltd.. ANSTEY, F., and BLEWITT, L. J. EDIS-. Oct. 18, 1951 [Oct. 19, 1950], No. 25427/50. Class 7 (v). In a hand-operated engine starting device employing a pulley 14, loaded by a spring 18, and a rope 15 and comprising a toothed pinion 13. attached to the pulley, an engine starting pinion 28 and an intermediate spur gear, such as gears 20, 23 or a single composite wheel, not shown, which is permanently in mesh with the pulley pinion 13 and affords a driving connection between the latter and pinion 28 during starting, the intermediate spur gear is provided with a gap in its toothed periphery so that when the engine is stationary or normally operating the starting pinion 28 can rotate freely with the engine shaft 29. To start the engine the rope 15 is pulled thereby rotating pinion 13, the latter transmitting its rotation to wheels 21. 23 to crank the engine, the wheel 23 turning a small angular distance before the gap in its periphery has moved far enough to permit the toothed portion thereof to mesh with pinion 28. When the engine starts in the correct direction a ratchet 32 upon shaft 29 overruns teeth 31 on pinion 28 and allows the starting pinion 28, wheels 21, 23 and pinion 13 to rotate in the reverse direction under the action of spring 18 to rewind the rope 15. The return rotation is limited by a stop to ensure the second spur wheel 23 comes to rest with the gap in its periphery opposite the starting pinion; the handle on the rope, which is outside the starter casing 10, will also act as a stop for the pulley 14 when it engages the casing 10. If the engine backfires on starting it rotates in the same direction as the spring and so returns the device to the inoperative position whereupon the engine can continue to run in reverse without damaging the device.
Patent GB-930325-A (GB)
Title: Strip welding apparatus
Inventor: COOPER JOSEPH H
IPC: B23K11/06
Filed: 1959-07-24
Abstract: 930,325. Making metal sheets; welding by pressure; shearing. TAYLOR-WINFIELD CORPORATION. July 24, 1959, No. 25430/59. Classes 83 (3) and 83 (4). Strip welding apparatus comprises two spaced clamps 11, 12, a shear assembly 15 mounted on a carriage 14 reciprocable transversely of the clamps, the shear assembly comprising upper and lower shear blades and guides beyond each end of the blades for guiding the blades during shearing of a pair of metal strips and the guides at one end of the blades being separable to enable the said guides to traverse the strip ends as the carriage is traversed, and means 16 for welding the sheared strip ends gripped in the clamps. A base 10 supports a pair of clamps 11, 12 along the oblique path 13 of travel of strip through the apparatus and a rectangular carriage 14 supporting the shearing assembly 15 and a roller electrode welding assembly 16 is movable in the base by a nut and drive shaft device 28, 29 from the position shown in Fig. 1 to the left and back again. The welding device comprises a transformer 33 connected to roller electrodes 39, the lower electrode being mounted on a pedestal 41 for vertical adjustment by a hand wheel and the upper electrode being connected to the piston of a fluid cylinder 43. The shearing assembly comprises upper and lower carriers 45, 46 for spaced pairs of blades 47, the carrier 45 being connected by linkage and bell-cranks to the piston of a fluid cylinder 57 and the carrier 46 being connected to the piston of a fluid cylinder 61. The carrier 46 is guided by rods 63 engaging holders 64 and a blocking plate 66 to take shearing shocks is movable beneath the rods 63 by a fluid cylinder 67. A pair of guide pins 70, 71 on the carrier 45 engage sockets 72, 73 on the carrier 46. The clamp 12 comprises a lower member 75 mounted on a pivoted platen 76 and carries at its ends a pair of fluid cylinders 79 whose piston-rods engage an upper member 81. The clamp is pivotable by a fluid cylinder 84. The clamp 11 is similar but is instead horizontally movable by a fluid cylinder. In operation with the carriage in the position shown in Fig. 1 and metal strip fed along path 13 from a coil, when the coil becomes exhausted the trailing end is clamped in clamp 12 and the leading end of a new strip is clamped in clamp 11. The lower shear carrier 46 is raised and locked and the upper carrier 45 is caused to descend and crop the strip ends, pins 70, 71 being guided in the sockets 72, 73. After shearing the carriers are returned, the clamp 12 is pivoted to raise its strip end and the clamp 11 is moved forward to overlap the strip ends. The carriage is then moved to the left in Fig. 1, the opened pin and socket 71, 73 allowing clearance of the cropped and overlapped strip ends, and the electrode rollers roll over and weld the overlapped ends, the welded seam being of less thickness than the overlapped ends.
Patent GB-241232-A (GB)
IPC: C01F7/26
Filed: 1925-10-12
Abstract: Alkali aluminates are produced by heating to incandescence at about 1100 DEG  C. a mixture of an alkali sulphate with an aluminous material containing silica such as bauxite, hydrargillite, diaspore or clay in a current of inert gas, for instance furnace gas or air in the presence of steam and adding lime or calcium carbonate so as to supply two molecules of lime to one of silica to give an insoluble silicate.  The materials may be mixed or briquetted and may be heated in a rotary kiln heated by producer-gas, oil, or coal dust, or in a muffle heated electrically.  Examples describe the production of aluminates from sodium and potassium sulphates and bauxite with the addition of calcium carbonate to bind the silica.  The proportions are preferably about one molecule of alkali sulphate to one molecule of alumina.
Patent GB-1144758-A (GB)
Title: Hold-off valve
IPC: B60T11/34
Filed: 1967-06-02
Abstract: 1,144,758. Hydraulic brake valve; valves. BENDIX CORP. 2 June, 1967 [13 June, 1966], No. 25514/67. Headings F2F and F2V. A pressure hold-off valve 20, Fig. 1, links a master cylinder 10 to a disc brake cylinder at 12 and provides a first fluid path between them up to a first predetermined pressure, whereupon it prevents further fluid flow until the master cylinder pressure reaches a second, higher, predetermined value, at which a second fluid path is provided. A rise in master cylinder pressure to the first predetermined value causes fluid to flow past the inner periphery (78, Fig. 3, not shown) of a resilient diaphragm 38 and through bores (68) in a piston head 49 to the line 22, further increase in pressure causing the head 49 to move to the right against a spring 56 and the diaphragm 38 to flex and close the bores (68). When the second predetermined pressure is reached the piston head 49 engages a poppet 32 and carries it to the right against a spring 42. and fluid then flows past the outer periphery of the diaphragm 38, through slots 36 in the poppet 32, and so to the brake line 22. The arrangement ensures that after initial application of the disc brakes 12, the pressure applied to them is held constant while the pressure applied to drum brakes 14 is increased to overcome the return springs, whereupon the pressure to the discs is further increased.
Patent GB-673786-A (GB)
Title: Improvements in or relating to automobile underframes
IPC: B62D21/11
Filed: 1950-10-20
Abstract: 673,786. Motor vehicle frames, mounting motors. BUDD CO. Oct. 20, 1950 [Dec. 16, 1949; March 22, 1950], No. 25584/50. Classes 79(iii) and 79(iv) A motor vehicle frame has a transverse frame member, which acts as an engine and/or wheel supporting beam secured in a downwardly open transverse recess, the transverse member being mounted by means of fore and aft longitudinally extending brackets thereon which are secured to the frame in overlapping relationship with the interposition of rubber bushes. The downwardly open recess may be formed by interrupting the frame longitudinal members, the gap being bridged by other frame members, or the longitudinal members may be continuous and each be provided with a pair of downwardly extending brackets, a recess being formed between the brackets. As shown in Figs. 1 and 3, applied to a vehicle with integral body and frame, a forwardly projecting sub-frame comprises on each side a longitudinal member 23 and separate extension member 34 which are connected together by side panel 24 reinforced by box section braces 25, 40. In the recess so formed is located the transverse beam 30, see also Fig. 4, which has a pair of brackets 43 at each end by means of which it is secured to the longitudinal members by bolts 45 with the interposition of rubber bushes 46. The transverse beam 30 may carry at its ends the links of an independent wheel suspension (not shown), and may be provided with a front engine mounting. The rear of the engine may be carried by a detachable transverse frame member 26. In a modification, Fig. 7, the box section longitudinal sub-frame members 226 are uninterrupted, and each one has a pair of depending brackets 238, 239, of U-shaped cross-section in plan, which support corresponding brackets 237 projecting from each corner of the hollow transverse member 227, with the interposition of rubber bushes. The upper ends of the depending brackets 238 project upwardly through the bottom of the boxsection longitudinals 226 and are welded to such longitudinals. The steering box 235 may conveniently be bolted to the longitudinal 226 at the position where it is reinforced by one of the brackets 238, tubular distance pieces 257 being located between the side walls to receive the fixing bolts.