baber/WOPTO huggingface dataset:
Patent GB-167268-A (GB)
Title: An apparatus for instrument for demonstrating the characteristics of aerofoils
IPC: G01M9/06
Filed: 1920-05-03
Abstract: 167,268. Hoare, P. V. May 3, 1920. Teaching, apparatus for.-An apparatus for demonstrating the characteristics of aerofoils is adapted to show how the position of the centre of pressure varies with variations in the angle of incidence of the aerofoil, and also, if desired, to show the variations of lift and drag, and of their resultant and ratio, with incidence. In one construction, an aerofoil section A<1> is pivoted at a to a board A, and carries a pointer moving over an incidence scale ax. A bar B behind the board A is also pivoted on the pin a and on this bar there slides a carriage C carrying a pin C<1> which passes through a curved slot a<2> in the board A and a straight slot a<1> in the aerofoil section A<1>. The slot a<2> is so shaped that the pin C<1> shows the position of the centre of pressure for each angle of incidence of the aerofoil section. The pin also carries a pointer moving over a centre of pressure co-efficient scale, marked on the edge of the slot a<1>. In order that the apparatus may also demonstrate the lift and drag variations, it is filled with a variable parallelogram formed of rods D<2>, D<3>, D<4>, D<5>. The rod D<4> is carried on the pin C<1> and is rigid with the rod D<5>. The rod D<5> can slide horizontally and - the rod D<2> vertically through a frame d<5>. The rod D<4> can slide vertically and the rod D<3> horizontally through a frame d<3>. The rod D<3> is rigid with a bracket D<1> through which the rod D<2> slides. In this bracket there engages a pin d<1> carried by a frame which can slide on a lever d<x>. The lever d<x> is pivoted at d<xx> to a drum D<xx>, which is rotated, as the aerofoil section is moved, by a cable M. A pin d<o> on the toe of the lever dx moves in a fixed slot D<o>, and the pin d<1> moves in a fixed slot d, these slots being so shaped that, for any position of the aerofoil section, the index d<3x> on the frame d<3> indicates the lift on a scale on the rod D<4>, and the index d<5x> on the frame d<5> indicates the drag on a scale on the rod D<5>. The diagonal C<1>, d<1> represents the resultant of the lift and drag forces, and an elastic rod or a telescopic rod between the pins C<1>, d<1> may pass over a quadrant D<6> graduated to show the variations in the lift drag ratio. The rod D' is jointed to levers E, which may be connected by a rod E<2> to prevent backlash. In another construction the pivoted aerofoil section, as it is moved to different angles of incidence, closes electric circuits containing lamps, which show, for each position, the angle of incidence, the centre of pressure, the drag, and the lift, and also, if desired, the resultant of the lift and drag.
Patent GB-163296-A (GB)
Title: Improvements in and relating to presses for cupping and drawing sheet metal
IPC: B21D24/00
Filed: 1921-04-28
Abstract: 163,296. Bliss Co., E. W., (Assignees of Klock-C, TV.). May 15, 1920, [Convention date]. Cupping. - The punch slide 10 of a deep - cupping &c. press is driven by a crank 13 at substantially uniform speed on its working stroke. The crankshaft 12 has a crank 25 connected by a rod 27 to a pin 29 on a uniformly rotating gear 22 eccentric to the shaft 12. Fig. 3 shows in full lines the position of the parts for the top of the stroke, and in broken lines their positiou for the bottom of the stroke, the rotation being clockwise. This construction also gives a quick return of the punch, Actuating-means 44, 45 for a. blank-holder or die slide 16 as described in Specification 143,832 may be operated from a crank 32 on the. shaft 12.
Patent GB-182977-A (GB)
Title: Improvements in or relating to electric switches
IPC: H01H19/56
Filed: 1921-04-29
Abstract: 182,977. Bristol Tramways & Carriage Co., Ltd., and Payne, B. A. April 29, 1921. Switches, quick-make, specially adapted for use on motor vehicles, comprise an insulating-disc 16 rotatable by a handle 18 with pointer 19, and carrying one or more spring-pressed rollers such as 24 each adapted to bridge a pair of fixed contacts such as 27, 28, definite on and off positions being obtained by the rollers advancing into notches such as 29 or 31. Two such switches are shown mounted in the insulating base-plate 13 within the cover 10. The upper switch controls the lights of the vehicle, serves, when the contacts 27, 28 are bridged to connect the battery to the dynamo, and when the contacts 83 are bridged, to complete in addition the lighting circuit. The lower switch completes or breaks the ignition circuit. The leads are connected to nuts 30 mounted on cheese-headed screws screwed into the base-plate 13; the heads of these screws, 27 &c. constitute the fixed contacts. Rotation of the switches is limited by lugs such as 22.
Patent GB-1073292-A (GB)
Title: Recovery of hydrazine
Inventor: ARGYLE CHRISTOPHER STANLEY
IPC: C01B21/16
Filed: 1963-03-29
Abstract: A water-insoluble salt of a substituted hydrazine is formed by contacting an aqueous solution of the hydrazine with cyanuric acid, ammelide or a thiocyanuric acid.  A free substituted hydrazine is recovered by thermal decomposition of the salt, or by reacting the salt with concentrated aqueous alkali to form a concentrated hydrazine solution and a precipitated cyanurate. Examples are given of the preparation of b -hydroxyethyl hydrazinium cyanurate and phenylhydrazinium cyanurate. The substituted hydrazine may also be a sulphonanyl hydrazine.ALSO:An aqueous solution of hydrazine or a substituted hydrazine is contacted with cyanuric acid, ammelide or a thiocyanuric acid to form a water-insoluble salt, which is separated from the aqueous medium and may be treated to recover the hydrazine. The acid may be dissolved in the aqueous solution or the solution may be passed through a column containing the acid, the reaction being effected at a temperature in the range from ambient to the boiling point of the solution.  The cyanurate precipitated is separated, preferably after cooling, by filtration or centrifugation and may be water-washed before recovery of the hydrazine by treating the salt with a substantially equivalent amount of aqueous alkali, e.g. NaOH, Na2CO3, NH4OH, Ca(OH)2 or Ba(OH)2.  A solution of the hydrazine is obtained, more concentrated than the original solution and containing a precipitated cyanurate which is separated off.  Alternatively the hydrazine cyanurate is thermally decomposed to yield anhydrous hydrazine.  The original hydrazine solution may be one obtained from a Rasehig synthesis and containing 2 to 3% hydrazine. Solutions of hydrazine sulphate are treated with alkali before contact with cyanuric acid.  Examples are given of the preparation of hydrazinium cyanurate and the treatment thereof with NaOH to yield an aqueous hydrazine solution and monosodium cyanurate. Salts of organo-substituted hydrazines and cyanuric acid are also prepared (see Division C2).
Patent GB-1209827-A (GB)
Title: Improvements in or relating to centrifugal pumps
Inventor: PAISH HAROLD PHILIP SIDNEY
IPC: F04D7/04
Filed: 1968-03-14
Abstract: 1,209,827. Internal stoppers. HENRY SYKES Ltd. 13 March, 1969 [14 March, 1968], No. 12485/68. Heading B8T. [Also in Division F1] A reservoir chamber of a centrifugal pump (see Division F1) has a pair of openings 35 in its sidewalls, and each opening is closed by a removable plug 30 comprising a pair of plates 31 which are drawn together by a butterfly nut 32 to sandwich a rubber sealing ring 34 and thereby jam the plug in the associated opening 35.
Patent GB-518410-A (GB)
Title: Improvements in or relating to optical projection apparatus
IPC: G03B21/16
Filed: 1938-04-27
Abstract: 518,410. Optical-projection apparatus. KODAK, Ltd. April 27, 1938, No. 12523. Convention date, April 27, 1937. [Class 97 (i)] In apparatus having a fan blowing cooling air on to lamp, a light baffle comprising a plurality of curved or arcuate members resting in spaced relation, is arranged above the lamp to permit exit of air but not of direct light rays. As shown the fan blades 11 draw air through lateral apertures 6, 7 and discharge it into an exhaust throat 9 in which the lamp 12 is situated the air passing out through the baffle comprising a plurality of longitudinal curved strips 15 rested together and preferably blackened. Specification 518,411 is referred to.
Patent GB-1300256-A (GB)
Title: Apparatus for welding to each other two surfaces of thermoplastic material
Inventor: DELPY JEAN-CLAUDE
IPC: B29C65/20
Filed: 1970-03-16
Abstract: 1300256 Seaming non-metallic sheet material J-C DELPY 16 March 1970 [18 March 1969] 12551/70 Heading B5K Apparatus for welding together two thermoplastic surfaces comprises a heating element 1 movable for interposition between the surfaces, the element 1 comprising a heating resistance disposed between two walls which are good heat conductors; a movable presser adapted to apply the surfaces against the element 1 and against each other after the element 1 has been withdrawn; and timed control means to control the movements of the element 1 and the presser 5 in order to regulate the period during which the element 1 is interposed between the surfaces and the presser 5 is applied. The element 1 is carried by a thermally insulated support 12 displaceable in the direction of an arrow 8 by a solenoid 3 the armature 13 of which is secured to the support 12. The movement of the support 12 is guided by rods 14 carrying return springs 4. The element 1 is suspended by four springs 2 slidable along two parallel rods 16. Control of the temperature of the element 1 is achieved by a rheostat or a regulatable bimetallic element, e.g. a thermostat. The presser 5 is lowered by a solenoid 6 to apply the two surfaces to be welded, e.g. the two ends 11, 11<SP>1</SP> of a banding strip, against the element 1 and against each other to effect welding after the element 1 has been withdrawn. When the current supply to the solenoid 6 is cut off, the presser 5 is lifted by return springs 7. The solenoids 3, 6 are operated by a programmer 9 having a manual button 10 to trigger an operating cycle. In one embodiment, Fig. 6, the heating element comprises a metal tube 21 (or folded metal plate) placed over a heating resistance 22, covered by insulating layers 24, the tube being flattened at 21a, 21b. The tube 21 is closed at one end by welding or brazing and is open at the other end to allow conductors to be connected to the resistance. The resistance 22, Fig. 8, may comprise a double-winding 22a on a flat support 22b, the turns of the windings being closer together in the front part of the element. In other embodiments, the resistance comprises a winding in the form of a flat rectangular double spiral, Fig. 9 (not shown), or a resistance wound on a thread of asbestos, Fig. 10 (not shown). In a further embodiment, the heating element consists of an armoured wire disposed in a flat configuration and the walls to contact the surfaces to be welded are constituted by a metallic coating on the armouring of the wire, e.g. formed by depositing copper thereon.
Patent GB-1362513-A (GB)
Title: Cables and winching arrangements therefor
IPC: D07B1/22
Filed: 1970-03-16
Abstract: 1362513 Cable tapes TELEFLEX Ltd 16 June 1971 [16 March 1970] 12587/70 Headings D1R and D1T [Also in Division B5] A ribbon-like cable is constituted solely of a laminate wholly enclosed within and directly bonded to a plastics matrix, the laminate being constituted solely of a plurality of layers superimposed one upon another with each layer extending substantially the width of the cable, each of the individual layers being constituted solely of a plurality of discrete, flexible filaments which are wholly encapsulated within and directly bonded to an encapsulating material which separates the filaments in each layer from each other and from the filaments in adjacent layers. In the examples the encapsulating material is polyurethane and filaments of steel, glass, carbon, nylon or polyester are aligned parallel to the longitudinal axis of the cable. In one embodiment the filaments comprise steel cords each wound from 19 wires. In another embodiment each filament has a rectangular cross-section. A winch for use with the cable is described and claimed in Specification 1362514 (see Division B8). The combination of winch and cable is described and claimed in the present specification.
Patent GB-1172875-A (GB)
Title: Improvements in or relating to Axial Piston Hydraulic Pumps, Motors and like Machines including Hydrostatic Bearings
Inventor: THOMA JEAN ULRICH
IPC: F16C17/08
Filed: 1967-03-17
Abstract: 1, 172, 875. Reciprocating pumps and motors. J.U. THOMA and R. GALDABINI. March 17, 1967 [March 26, 1966], No. 12656/ 67. Heading F1A. In a rotary cylinder block axial piston pump or motor, the non-rotary distributing valve 3 is provided with grooves 6, outside the valve ports 4, having end portions 7 closer to the axis of the valve. The grooves 6 are supplied with liquid from the pump or motor cylinders via bores (8, Fig. 3, not shown), in the cylinder block (1) which communicate with the grooves at the ends 7. Pressure relieving grooves 9 or recesses in the distributing valve 3 are arranged to communicate with blind bores (10, Fig. 3), in the cylinder block valve face for the removal of liquid and dirt from the blind bores which is collected during their passage over the grooves 6.
Patent GB-580340-A (GB)
Title: Improvements in or relating to carburettors for internal-combustion engines
IPC: F02M7/08
Filed: 1944-07-03
Abstract: 580,340. Spray carburetters. BEDALE, P. W. July 3, 1944, No. 12670. [Class 7 (iii)] In order to supply increased fuel to an engine momentarily as the throttle is opened a carburetter has fuel delivered to a supply chamber 12, communicating through a jet (not shown) with a chamber 13 leading to the induction pipe, through a port controlled by a valve 21 actuated by a diaphragm 11, normally operated to close the valve by the pressure difference between chambers 12 and 13 and connected to a piston 16 operated by a throttle actuated pump 17. When the throttle control is opened a pump piston 19, which is connected to it by a rod 20, moves into a cylinder 17 and forces fuel through a conduit 18 into a cylinder 15, increasing pressure therein and loading diaphragm 11, through piston 16, so that valve 21 is opened. The pressure in the supply chamber 12 is also increased and results in an increased flow of fuel to the engine. When the throttle movement ceases, the pressure in the cylinder 15 is reduced by leakage past the piston 16 until it is equal to the pressure in, conduit 14. An automatic valve 22 is mounted on the pump piston 19 and opens when the piston moves out of the cylinder 17, when the throttle is closed, so that the cylinder refills with fuel. An engine driven governor 10 may be arranged to bias the valve 21 towards its open position.
Patent GB-514260-A (GB)
Title: Improvements in and relating to fireguards
IPC: F24C15/36
Filed: 1938-04-28
Abstract: 514,260. Fire-guards. DOWDALL, J. T., and DOWDALL, A. E. April 28, 1938, No. 12700. [Class 126] A fire-guard comprises a four-sided central part a having on all four, sides wing-like integral extensions b, b<1>, d, d<1> which extend rearwardly at obtuse angles to the central part, two extensions d, d' on opposite sides of the central part being deformable by bending to vary their angles to the central part and the distance which they space the latter from the fire, while the remaining two extension b, b<1> either are made shallower than the extensions d, d' or are also deformable by bending to vary their angles to the central part, to enable them to accommodate the variation of distance between the central part and the fire. The edges of the wings d, d<1> that are in contact with the fire may be curved. The guard is attached to the fire by hooks g<1> which engage the fire and have elongated shanks screwthreaded at their outer ends to receive nuts g<2>, which clamp plates f against the bars of which the guard is composed.
Patent GB-593519-A (GB)
Title: Copolymers of dimethyl styrenes
IPC: C08F12/12
Filed: 1945-05-22
Abstract: The process comprises copolymerizing a mixture of copolymerizable materials containing the -CH=CH- group, at least one of which is a dimethyl styrene having the methyl substituents in the nucleus, at least one being in the ortho position to the vinyl group, at least 10 per cent of each of the materials being present, and continuing the copolymerization until the intrinsic viscosity is at least 0.1. Preferably, a plurality of dimethyl styrenes having methyl groups in the nucleus is used. Other materials with which the dimethyl styrene may be copolymerized include styrene, substituted styrenes (listed), acrylic acid, the esters, amides and nitriles of acrylic and methacrylic acids, maleic and fumaric acids and their nitriles, esters and imides, esters of itaconic and tetrahydrophthalic acids, acrolein, vinyl chloride, vinylidene chloride, isopropenyl benzene and toluenes, vinyl naphthalene, vinyl mesitylene, vinyl diphenyls, vinyl carbazole, vinyl phenols, vinyl pyridine, vinyl furane, butadiene, isoprene, piperylene, chloroprene and b -myrcene.  The rate of copolymerization may be increased by the use of polymerization catalysts and promoters.  The process may be carried out in bulk or in aqueous dispersion, suitable dispersing agents being talc, calcium phosphate, styrene-maleic acid copolymers, dimethyl - styrene - maleic acid copolymers, methyl cellulose, polyvinyl alcohol, methyl starch, glycol cellulose and polyacrylamide.  Emulsifying agents listed include sodium hydroxystearate, sodium salts of sulphated alcohols, sulphonates and the alkyl esters of sulphosuccinic acid, dodecylamine hydrochloride and formate and quaternary ammonium compounds. The fusible thermoplastic copolymers may be extruded into sheets and fibres which may be drawn, or thin aqueous dispersions or solutions in organic liquids used in the treatment of fibrous materials.
Patent GB-658449-A (GB)
Title: Process for the separation of dienes and the products thus obtained
IPC: C07C7/177
Filed: 1949-05-13
Abstract: The separation of an aliphatic conjugated diene and its closely related alicyclic conjugated diene from a hydrocarbon mixture comprising them is effected by subjecting to a dimerization treatment wherein the alicyclic diene is converted to dimer, separating a monomeric fraction comprising the aliphatic diene and a dimerized fraction, heating the latter at about 150-450 DEG  C. to convert the alicyclic diene dimer to monomer, separating from the resulting mixture a fraction comprising alicyclic diene monomer and a fraction comprising unaffected dimers, heating the latter to above about 500 DEG  C. to convert remaining dimers to monomers, and separating a fraction comprising said monomers which may be recycled to the dimerization.  The initial mixture may comprise isoprene, with or without piperylene, and cyclopentadiene.  Other aliphatic dienes which may be separated are trans-1,3-pentadiene, trans-2 (or 3)-methyl-1,3-pentadiene, 2 - isopropyl - 1,3 - butadiene, trans - 1,3 - hexadiene, and 2 - butyl - 1,3 - pentadiene.  Other alicyclic dienes are alkyl cyclopentadienes such as 5-methyl-1,3-cyclopentadiene.  The first pyrolysis of dimerized fraction is preferably effected at 350-450 DEG  C., the second at 550-700 DEG  C., in the presence of steam, and with residence times of 0.2-4, preferably 0.5-2, seconds.  The initial dimerization may be effected by heating at about 50-130 DEG  C.  An equation for obtaining the time required is given. Solvents or diluents and a blanket of inert gas may be present. Separation of dimers is preferably by fractionation.  The stripped monomer may be purified by extractive distillation or complex formation with heavy metal cations.  Unconverted dimers remain in the residue after distillation of the product of the second pyrolysis treatment and may be recycled. Examples describe the treatment of mixtures obtained by distilling a cracked gasoline or petroleum or from destructive distillation of coal to recover isoprene or 1,3-pentadiene and cyclopentadiene.
Patent GB-403003-A (GB)
Title: Improvements in or relating to electric discharge valves and grid electrodes for usetherein
IPC: H01J19/38
Filed: 1933-05-02
Abstract: 403,003. Discharge apparatus. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. May 2, 1933, No. 12825. Convention date, May 2, 1932. [Class 39 (i).] A grid is supported by a plurality of metal supporting rods on stiff wires which are threaded through tubular insulators and constitute the current leads to the grid. The insulators may be glass, quartz, steatite on the like. In one form, the wall 1 of the vessel is formed into a pinch 2, and stiff wires 4 sealed therein are bent at angles at 5 and the bent-over parts are passed through small insulating tubes 6. A wire net or mesh grid is laid around the tubes, and connected to the wires 4 at 3. In a modification, metal rods are woven into the mesh during manufacture and are then replaced by insulating tubes which are slipped on to the support wires.
Patent GB-1292226-A (GB)
Title: Production of copolymers
Inventor: ROUBINEK LUBOR
IPC: C08F2/20
Filed: 1970-03-17
Abstract: 1292226 Suspension co-polymerization PERMUTIT CO Ltd 19 April 1971 [17 March 1970] 12849/70 Heading C3P Two unequally reactive monomers are copolymerized in an aqueous suspension medium containing a stabilizer for globules of the monomer mixture, and the tendency for the concentration of the more reactive monomer in the globules to decrease is wholly or partially offset by continuous or intermittent addition of an aqueous monomer emulsion containing a higher concentration of more reactive monomer than is present in the globules at the time of said addition. The amount of stabilizer is such that the globules are prevented from coalescing but are penetrable by the added monomer emulsion. This may be achieved either by starting with a low stabilizer amount and adding further amounts as polymerization proceeds or by starting with a high concentration such that the globules are impenetrable and effecting polymerization with addition of monomer emulsion until the stabilizer is degraded to allow penetration, and then adding both monomer emulsion and further stabilizer as polymerization proceeds. The concentration of more reactive monomer in the added emulsion may be gradually increased, e.g. by forming two emulsions of different reactive monomer concentration, one of which is initially added, and then a mixture of the two in gradually varying amounts until the second is added alone. The process aims to lessen the usual variation of reactive monomer concentration in the finished polymer. Examples are directed to the production of: (1, 5 and 6) styrene/divinyl benzene copolymer beads containing on average 5À4% divinyl benzene, the catalyst being benzoyl peroxide and the stabilizer polyvinyl alcohol, the copolymer product of Example 1 being swollen in 1,2- dichloroethane and then sulphonated to produce an ion-exchange resin; (2) styrene/ethylene glycol dimethacrylate (2À86% average) copolymer beads in the presence of benzoyl peroxide and polyvinyl alcohol, the product being swollen in ethylene dichloride, and reacted with chloromethyl ether and then trimethylamine to give a basic anion-exchange resin; (3) styrene/ acrylonitrile (9À7% average) copolymer beads in the presence of azodiisobutyronitrile and polyvinyl alcohol; and (4) methyl methacrylate/methacrylic acid (4À85% average) linear bead copolymer in the presence of benzoyl peroxide and hydroxyethyl cellulose.