baber/WOPTO huggingface dataset:
Patent GB-1494338-A (GB)
Title: Control of power converters
IPC: H02M7/523
Filed: 1974-11-15
Abstract: 1494338 Controlling converters GENERAL ELECTRIC CO 15 Nov 1974 [15 Nov 1973] 49524/74 Heading H2F In a converter having a commutating circuit comprising the parallel arrangement of a capacitor 15 and inductor, a voltage transformer 18 derives a voltage proportional to the voltage across the capacitor 15 and a current transformer 19 derives a voltage proportional to the current through 15, firing pulses are obtained from the sum of said two voltages, the arrangement being such that the turn-off time t 0  is substantially constant for changes in frequency due to changes in load impedance. The invention is applicable to an inverter for induction heating or for supplying power to a cyclo converter forming part of a high-frequency link. As shown in Fig. 1, the inverter may comprise a bridge of mercury arc rectifiers, ignitrons or thyristors S1 ... S2<SP>1</SP>. Potential transformer 18 monitors the voltage across the commutating capacitor 15 while current transformer 19 monitors the current in 15. The two signals are fed to an analogue computer circuit (Fig. 4) in which if the burden resistor R x  = t 0 /C, then by appropriate selection of a reference potential, the firing pulses for the thyristors S1 ... S2<SP>1</SP> can be provided at times such that t 0  (Fig. 2) remains independent of frequency. Further thyristors S3 ... S41 may be included for passage of reverse current or so that the circuit can act as a cyclo converter. In Fig. 4 (not shown), the additional thyristors are replaced by diodes, separate pairs of inductors being connected between the supply terminals 11, 12 and the thyristors/diodes. Further inductors are included between the commutating circuit 15, 16 and the thyristors/diodes. In Fig. 8 (not shown) a pair of monostable circuits follow the comparator so as to eliminate triggering by spurious zero crossings of the commutating voltage.
Patent GB-1113113-A (GB)
Title: Grippers for lifting sacks
IPC: B66F9/18
Filed: 1964-12-07
Abstract: 1,113,113. Devices for lifting sacks. UNITED SACK CONTRACTORS Ltd., and E. W. DAVIES. 15 Sept., 1965 [7 Dec., 1964], No. 49690/64. Heading B8H. A vehicle attachment for picking up sacks two at a time comprises a base frame 2 pivoted at 6 to an upright frame 4 which supports a pivotal gripping frame 8. The device may be attached to a masted lift-truck or the front loader arms of a tractor by bearing-shafts 16. Rams 30, 32 pivot the frames 4, 8, respectively. Plates 28, which may carry extensions 28a, bear against the tops of the sacks. Figs. 2-5 (not shown), illustrate the sequence of lifting operations in which the frame 8 is first lowered to engage the top of the sacks followed by a rearward tilting of the frame 4 so that a bar 22 is below the sacks.
Patent GB-1359692-A (GB)
Title: Ion exchangers and their manufacture
IPC: B01J39/20
Filed: 1971-10-26
Abstract: 1359692 Grafted polyvinyl alcohol INSTITUT TEXTILE DE FRANCE 26 Oct 1971 [27 Oct 1970] 49761/71 Heading C3G An ion exchange material is produced by (a) grafting an ionic monomer on to polyvinyl alcohol in aqueous solution in the presence of eerie ions and isolating the soluble graft polymer thus obtained from its solution in solid form and (b) in solubilizing the graft polymer by acetalization with formaldehyde alone, Or in admixture with a dialdehyde, in a solvent for the acetalizing agent in the presence of an acid catalyst. The graft polymer may be isolated from its solution in step (a) by casting the solution and drying to form a film, by precipitation with a non-solvent followed by comminution or by coagulation to yield a gel. In the examples, polyvinyl alcohol is grafted with (i) methacrylic acid and the film or powder produced is treated in a formaldehyde/acetone/hydrochloric acid/ water bath; (ii) acrylic acid and the film or powder produced is treated in a formaldehyde/  dioxane / hydrochloric acid / water bath; (iii) 4-vinyl pyridine and the film or powder produced is treated in a formaldehyde/terephthaldehyde/  acetone/hydrocyloric acid/water bath prior to treatment with sodium hydroxide and quaternization with methyl sulphate, methyl iodide or another halogen-containing derivative or (iv) maleic acid or itaconic acid, the powder or film produced being treated in a bath as specified in (iii). The graft monomer may also be 2-vinylpyridine and the dialdehyde may be glyoxal.
Patent GB-1473780-A (GB)
Title: Beams for example warp beams for textile machines
Inventor: PFARRWALLER ERWIN
IPC: D02H13/28
Filed: 1975-12-04
Abstract: 1473780 Warp beams SULZER BROS Ltd 4 Dec 1975 [5 Dec 1974] 49848/75 Heading D1E An adjustable warp beam 1 has an inner tube 3 screwed into an outer tube 2 and secured therein by turning a bolt 23 to tilt a plate 14 to act on a wedge 13 and expand the inner tube 3 against the outer tube 2. More than one beam may be coupled together (Figs. 3 and 4, not shown).
Patent GB-1526748-A (GB)
Title: Upgrading of solid fuels
IPC: C10L5/00
Filed: 1975-12-08
Abstract: 1526748 Upgrading solid fuel TEXACO DEVELOPMENT CORP 8 Dec 1975 [20 Feb 1975] 50298/75 Heading C5G A beneficiated low rank solid carbonaceous fuel in finely divided form is produced by partially grinding the fuel to form particles having a maximum dimension of not greater than one inch, forming a mixture of the particulate solid fuel and water, heating the mixture to between 300 and 700‹ F. at a pressure sufficient to maintain liquid water in the heating zone for between one minute and 5 hours, cooling the mixture and then subjecting the treated fuel to additional grinding. The fuel may be sub-bituminous coal or lignite. The heating may be carried out in non-oxidizing conditions, e.g. by sweeping the reaction zone with an inert gas such as reducing gas, steam or nitrogen.
Patent GB-1049735-A (GB)
Title: Detergent compositions
Inventor: HERRMANN KENNETH WALTER
IPC: C23G1/24
Filed: 1963-08-12
Abstract: Aqueous homogeneous liquid detergent compositions comprise (1) 1-40 wt. per cent (based on the whole composition) of one or more detergent surfactants selected from groups (a), (b) and (c) as follows: (a) amine oxides of formula R1R2R3N - > O, where R1 is an aliphatic, monohydroxy aliphatic, or alkoxy monohydroxypropyl radical in which the alkyl or alkoxy group is C10- 20, and R2 and R3 are each C1- 3 alkyl or alkanol radicals, (b) phosphine oxides of formula R4R5\R6P - > O, where R4 is a C8- 18 aliphatic or monohydroxy aliphatic radical, and R5 and R6 are each C1- 3 alkyl or alkanol radicals, and (c) sulphoxides of formula <FORM:1049735/C4-C5/1> where R7 is a C10- 20 aliphatic radical which may carry one hydroxy substituent and may be interrupted by one or two ether linkages; (2) 0-40% of one or more polyvalent electrolyte salts; (3) a solubilizing amount of either a furoate, an ethyl benzene phosphonate, or a compound of formula R8-COOM, where M is a water-soluble cation, and R8 is a C2- 7 unsaturated aliphatic radical, a C6- 12 aromatic, substituted aromatic or aralkyl radical, a C3- 6 branched chain saturated aliphatic radical, or a C1- 5 chloro-substituted saturated aliphatic radical; and (4) the balance substantially water. Typical of many specified components (3) are potassium sorbate, sodium trimethyl acetate, sodium benzoate, and potassium tetrolate. Component (2), when present, may be sodium sulphate, a sodium or potassium phosphate or polyphosphate (e.g. tetrapotassium pyrophosphate), a methylene or ethylene diphosphonate (e.g. trisodium ethane-1-hydroxy-1,1-diphosphonate), sodium, potassium or ammonium ethylene diamine tetraacetate or nitriloacetate, or a silicate.  The compositions may also contain conventional ingredients, e.g. carboxymethylcellulose.
Patent GB-1346886-A (GB)
Title: Unitary power assemblies
IPC: F16H39/04
Filed: 1972-11-02
Abstract: 1346886 I C engine gearing GENERAL MOTORS CORP 2 Nov 1972 [8 Nov 1971] 50536/72 Heading F1B [Also in Division F2] An internal combustion engine and hydrostatic transmission assembly comprises an engine 10 which has a radial piston pump 11 mounted on one end of it and radial piston hydrostatic motors 12, 13 mounted on either side of it, pipes and passages 73, 83, 91, 75, 84, 92 inter-connecting the outlet and inlet 71, 72 (or vice versa) of the pump with motor 12, similar conduits connecting the pump with motor 12. In the embodiment shown the pump 11 and motors 12, 13 are interconnected with the cooling fluid circuit of the engine so that the motors 12, 13 are surrounded by cooling jackets 174, 166 respectively and certain of the pipes (e.g. 83, 84) inter-connecting pump and motors pass through chambers (e.g. 87, 88) containing coolant. This serves also to silence the pump and motors. The pump 11 and motors 12, 13 are essentially identical with a variable eccentricity cam ring 53 and pistons which bear against a track ring 51 mounted through needle bearings 52 on the cam ring, the rotor 46, which supports the pistons being rotatably mounted on a central pintle which includes inlet and outlet passages. In the illustrated embodiment the pintles also each include a cooling fluid passage, referenced 123<SP>1</SP> in the motor 12 of Fig.1. The variation of the eccentricity of cam ring 53 is, in each of the motors and the pump, by fluid pressure supplied to two chambers at diametrically opposite sides of the cam ring, this being shown clearly in motor 12 of Fig.1 wherein the cam ring 53<SP>1</SP> is moved by pressure fluid from pipes 154 and 156 to chambers 152, 153. The pump 11 illustrated is driven from the engine cam-shaft 27, but it may be driven from the crank-shaft and the pump and motors may not be included in the engine cooling system Figs. 6 and 7, (not shown). Each motor can be connected through a swing axle assembly to a drive wheel of a vehicle.
Patent GB-1223034-A (GB)
Title: Method and means of joining strip materials
Inventor: BEHLEN WALTER DIETRICH
IPC: B21D39/03
Filed: 1968-10-24
Abstract: 1,223,034. Seaming; bending cutters. BEHLEN MFG. CO. Inc. 24 Oct., 1968, No. 50614/68. Headings B3J and B3W.  A method of joining together sheets 10, 12 comprises deforming a portion of material out of each sheet simultaneously and moving the sheets longitudinally and relatively to each other to cause the portions to interlock. The sheets are deformed between bending cutters which sever the sheets along lines forming opposed tabs 34 and recesses 42. When the sheets are relatively displaced longitudinally, the tabs on one sheet slide over or under respectively, the adjacent margins of the other sheet, Fig. 7 (not shown).
Patent GB-995518-A (GB)
Title: Improvements in or relating to theatres
IPC: E04H3/22
Filed: 1963-12-23
Abstract: 995,518. Theatres; roof and floors; acoustic control. M. A. BOURBONNAIS. Dec. 23, 1963 [Jan. 9, 1963], No. 50631/63. Headings E1A, E1S and E1V. An hexagonal theatre is provided with a floor 6 made up from vertically adjustable prism-like elements a whereby the stepped rows 10 for the spectators, the stage, podium 11 and scenery elements 12 can be varied at will. Like considerations apply to the ceiling which can be modified for acoustic or scenic effects. Each element a consists of suitable wooden panels mounted on a reinforced metal framework which is adjusted by a lead screw and pinion mechanism operated by hand or by means of an electric motor, the elements being individually or collectively adjustable, see Figs. 3 and 4 (not shown).
Patent GB-1276963-A (GB)
Title: Concrete pumping machines and valve assemblies therefor
IPC: F16K3/00
Filed: 1970-10-26
Abstract: 1276963 Valves DESA INDUSTRIES Inc 26 Oct 1970 [10 Nov 1969 25 Aug 1970] 50764/70 Heading F2V [Also in Division F1] A concrete pump has a valve assembly comprising an arcuate blade 35 pivotally mounted at 39 and hydraulically-actuated to swing into and out of sealing housings 31, 33 on the inlet and outlet conduits 20, 21, to close and open the conduits in synchronism with movement of the pump piston 25. In the embodiment shown, the sealing housings each have a replaceable U-shaped hardened steel liner 84, Fig. 4, a sealing gasket 87, and an oil pad 96 supplied with oil from the hydraulic actuating system to lubricate the blade 35. The pump piston is hydraulically actuated by piston 27, the movements of the valve and pump actuators being synchronized by pilot valves operated at the end of the valve and piston movements, Figs. I and 13 (not shown). In Fig. 16 (not shown), the sealing pressure of the sealing gasket is adjustable.
Patent GB-1119899-A (GB)
Title: Automatic lapping machine
IPC: B23Q15/007
Filed: 1966-11-14
Abstract: 1,119,899. Grinding. R. S. GENTRY. 14 Nov., 1966 [25 Feb., 1966], No. 50936/66. Heading B3D. An automatic lapping machine comprises a base 10, a worktable 12 supported on the base, a plurality of post members 16 slidable vertically in guides 14 through the plane of the table, a head 20 mounted on the upper ends of the post members, a lap carrier 28 mounted for reciprocating movement in the head, drive means 36 for reciprocating the carrier and laps through upward and downward strokes of predetermined length, feed drive means 108 below the worktable for actuating a feed mechanism 82 acting on the lower ends of the posts to raise and lower the posts and head with respect to the table, means to actuate the feed drive means at a predetermined point of each downward stroke of the lap carrier to lower the head and posts by a predetermined amount, and means to arrest the downward movement of the lap carrier and lap on meeting resistance by the workpiece exceeding a predetermined amount. The posts 16 are connected at their lower ends to a platen 18 and at their upper ends to the head 20 which has a central housing 24 for slidably receiving the lap carrier 28. A yoke 38 is secured to the carrier and has an insert 40 for engaging a cam 36 rotated by a belt-drive from a motor 56. An air cylinder 44 has a rod 42 for urging the insert 40 against the cam. An extension 46 from the yoke has a bore slidable on a post 50 to guide the yoke and a screw 72 which co-operates with a limit switch S-1. A threaded bore in the lap carrier receives a holder 62 for a lap 64 which operates on the bore of a workpiece 66 secured by a clamp 70 to the worktable 12. The lower platen 18 is connected through a lost-motion connection with a lead screw 82 drivable through reduction gearing 84 from a shaft which is driven under manual control from a motor 96 when an electromagnetic brake 92 is engaged to raise or lower the head and lap. Alternatively, the shaft is rotated incrementally to effect downward feed of the head and lap when the screw 72 actuates switch S-1 to cause actuation of an air cylinder 108 which reciprocates a rack 106 engaging a pinion connected by an electromagnetic clutch 102 with the shaft. In operation, the lap and head can be vertically adjusted by operation of the motor 96, and the motor 56 energized to rotate the cam 36, the air cylinder urging the insert 40 against the cam so that the head and lap are vertically reciprocated. At each downward movement the screw 72 actuates switch S-1 so that cylinder 108 causes an increment of downward feed. If the resistance to downward movement between the lap and workpiece exceeds a predetermined amount and the head and lap do not follow the movement of the cam the switch is not actuated until the resistance to downward movement caused by lapping has decreased. The lapping continues until a switch S-5 in the head is actuated by a rod 78 on the table 12.
Patent GB-1177598-A (GB)
Title: Improvements in or relating to the Production of Luminescent Screens for Colour Television Tubes.
Inventor: LEVINOS STEVEN
IPC: H01J29/22
Filed: 1968-10-28
Abstract: 1,177,598. Luminescent screens. GAF CORP. 28 Oct., 1968 [1 Nov., 1967], No. 50998/68. Heading C4S. [Also in Divisions C3 and H1] In a method of making a multicolour television tube screen based on a resist method using an electron beam instead of light, there is used an organic binder, sensitive to the electrons but insensitive to light, comprising a water-soluble ethylenically unsaturated vinyl monomer/polymer compound containing at least one grouping of the formula CH 2 =C<, eg. polyvinyl pyrrolidone, polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl methyl ether, poly-(methoxyethyl) vinyl ether; copolymers including vinyl methyl ether/ maleic anhydride, ethylene/maleic anhydride, isobutyl vinyl ether/maleic anhydride, styrene/ maleic anhydride, vinyl pyrrolidone/maleic anhydride, poly-(methoxyethyl) vinyl ether/ maleic anhydride, polyvinyl pyrrolidone, allyl amine, and monomers including acrylamide, N,N<SP>1</SP> - methylenebisacrylamide, acrylic acid, methyl methacrylate divinyl benzene and vinyl stearate. Particularly suitable is a copolymer of maleic anhydride and an alkyl vinyl ether with about 10% to about 65% on a mole basis of maleic anhydride and an alkyl moiety containing from 1 to 20 carbon atoms, e.g. methyl, isobutyl, dodecyl, hexadecyl, octadecyl &c., ethylene, propylene, styrene &c. A suitable copolymer of maleic anhydride and methyl vinyl ether has a viscosity of 2À0 measured at 25‹ C. as a 1% solution in methyl ethyl ketone.
Patent GB-1303623-A (GB)
IPC: G10K11/34
Filed: 1966-11-15
Abstract: 1303623 Sonar systems CONTROL DATA CORP 15 Nov 1966 [15 Nov 1965] 51248/66 Heading H4D In an acoustic radiator system, a linear alloy of sonic transducers 10a, 10b ... 10n produce a sound beam which is caused to scan periodically by frequency control. Delay devices which consist of binary dividing circuits 12a, 12b, ... 12n are coupled to the transducers through flip-flops 14a, 14b ... 14n. These delay devices are controlled in correspondence with the source frequency so that, as the latter is altered, the delays at each transducer are changed and the radiation distribution from the system is angularly moved. A reference pulse frequency, which is preselected, fixes the carrier frequency of each transducer while a clock frequency determines the time delay between the pulses of one transducer and the next i.e. the phase relationship of their respective carrier wave outputs. When installed in a ship, correction in yaw, pitch and roll may be effected by adjustment of the source frequency so as to move the beam correctively. In an embodiment in which 180 degree scanning is effected (Fig. 5), two dividing circuits are associated with each transducer. To prevent the formation of back-lobes in the transducer radiation pattern, further delay factors are incorporated. In another embodiment (Fig. 7, not shown), a switching circuit is incorporated so as to enable scanning between 90 and 180 degrees merely by reversal of the phase relationship required to scan between 0 and 90 degrees. The outputs from the transducers are in the form of square waves; filtering may occur in the transducer itself; or separate filters may be provided between the transducers and flip-flops.
Patent GB-513024-A (GB)
IPC: D01H5/26
Filed: 1939-02-23
Abstract: 513,024. Drawing apparatus for rovings. CASABLANCAS HIGH DRAFT CO., Ltd., and CASABLANCAS, F. March 31, 1938, No. 9889. [Class 120 (ii)] In belt drawing-apparatus for rovings at least one belt is provided with a self-tensioning arrangement comprising a friction member 6, in the form of a rod, bar or roller adjustable as to size and position, arranged between the supporting roller 2, and the usual tensor or guide 5, so that a slack loop 7, is formed. A fixed bar or rod 8, may also be provided in the loop. As shown, in Fig. 1, a single belt is used with a plate 3 beneath it; an arrangement with the positions of the belt and plate reversed may be used. A freely rotatable, braked, fixed or driven roller 9, Fig. 2, may constitute the friction member, and one or more rollers 10, and plates 11, may be provided to support the roving. In a double belt arrangement, Fig. 4, two additional rollers 13, 14, may be provided, the lower 13 being engaged by both sides of the belt and,being stationary or driven at a less speed than the belts, and the upper 14 being freely rotatable and, if desired, adapted to be engaged by both sides of the belt; the upper belt in this arrangement may be omitted.
Patent GB-1172180-A (GB)
Title: A Process for Improving the Purity of Inorganic or Organic Crystalline Products
IPC: B01D9/00
Filed: 1968-11-01
Abstract: 1,172,180. Purifying crystals. STANDARDMESSO DUISBURG GESELLSCHAFT FUR CHEMIETECHNIK MIT BESCHRANKTER HAFTUNG & CO. 1 Nov., 1968 [20 Jan., 1968], No. 51900/68. Heading BIG. A solution is cooled or evaporated to effect crystallization, the resulting crude crystals and mother liquor are separated by centrifugation, the crude crystals are mixed with fresh solvent to form a paste of purified crystals and solution, the purified crystals and solution are separated by centrifugation, and the separated solution, alone or together with mother liquor, is added to fresh solution to be crystallized. The crude crystals may be mixed with fresh solvent together with a portion of the separated solution to form the paste.
Patent GB-1211700-A (GB)
Title: Improvements in or relating to latticed sheets
Inventor: RIS FRITZ
IPC: E04F13/04
Filed: 1967-11-16
Abstract: 1,211,700. Laminated building panel. RIPPENSTRECKMETALL-G.m.b.H. 16 Nov., 1967, No. 52214/67. Heading B5N. [Also in Divisions B2 and B6] A latticed plaster support sheet or hidden shuttering plate is made by slitting and stretching a metal or plastics sheet and narrowing or partly closing the apertures of the so-formed expanded latticework by lining or coating so that the structure is permeable to mortar, air and water. Before applying the lining or coating, reinforcing ribs may be formed in the latticework and the lattices may be pressed flat. The following laminating methods of partially closing the apertures are disclosed: (1) the sheet is covered with a permeable or perforated sheet, e.g. woven or braided jute, plastics, or metal cloth, a fleece (optionally resin-bonded) of glass or mineral wool fibre, or a perforated paper or plastics sheet; (2) the apertures are partly covered with paper or plastics sheet. Coating methods are also disclosed. Lining sheets are applied by high-frequency welding, heat, stitching, stapling, nailing, pasting, adhesive or in the case of plastics foils, by heat-shrinking. Plastics foils may form a rim around the sheet so that adjacent panels can be bonded together.
Patent GB-1191477-A (GB)
Title: Abradable Metallic Seal Material.
IPC: F01D11/12
Filed: 1967-11-16
Abstract: 1,191,477. Composite metal sheets. GENERAL MOTORS CORP. 16 Nov., 1967 [12 Dec., 1966; 24 Aug., 1967], No. 52230/67. Heading E1K. [Also in Division F1] A bradable metallic seal material for turbomachines comprises a rigid cellular laminated structure made up of metal sheets bonded together so that holes, or recesses, arranged gridwise in the surface of one sheet or sheets are closed by another sheet or sheets in face-to-face contact therewith to form cells which block the flow of fluid through the structure parallel to the sheets. In one embodiment a number of substantially identical sheets 41, 42, 43, Fig. 3 each having a gridwise series of recesses 45, 46 respecively etched in both faces, are bonded together, together with a flat mounting sheet 51. In another embodiment, Fig. 4 (not shown), sheets 61 having holes in gridwise arrangement right through them alternate with flat sheets 62. The sheets may be made of high. temperatureresistant metal and may be diffusion bonded together.
Patent GB-1057578-A (GB)
Title: Titanium-base alloys
Inventor: MINTON CLIVE DUDLEY THOMAS
IPC: C22C14/00
Filed: 1964-12-23
Abstract: A titanium-base alloy has the following percentage composition: Al 2.5 - 7.5 Zr 2 - 7 Mo 0.1 - 6 Si 0.1 - 1 Cu 0.5 - 6 Ti the remainder The alloy may also contain Sn 0.1 - 8 and/or C 0.05 - 0.4.  It may be solution treated at 910 DEG C., oil quenched and aged at 500 DEG C. for 24 hours. Alternatively it may be solution heated at 920 DEG C., slow cooled and aged at 500 DEG C. for 24 hours. The use of this alloy for steam turbine blades and alternator end bells is referred to.