baber/WOPTO huggingface dataset:
Patent GB-1418996-A (GB)
Title: Brushless dynamoelectric machine
IPC: H02K11/00
Filed: 1973-02-19
Abstract: 1418996 AC machines with DC excitation WESTINGHOUSE ELECTRIC CORP 19 Feb 1973 [6 March 1972] 7997/73 Heading H2A In a brushless dynamo-electric machine, e.g. an A.C. generator 62, having an A.C. exciter 60 and a rotating rectifier assembly 61 with at least one rectifier wheel 36, 37 mounted on the machine shaft 38 and insulated therefrom, at 40, there is mounted on the wheel a rectifier module 10 which comprises a conductive base member 11 supporting a fuse 25, at least one diode assembly having a disc-shaped pressure contact type rectifier diode 19 disposed between and in electrical and thermal contact with two metal heat sinks 20, 21, e.g. of Cu or Al of which one, 20, engages the base member, spring means supported from the base member and applying a predetermined force to the other, 21, of the heat sinks to maintain contact between the base member, heat sinks, and diode, and means electrically connecting the diode assembly to the fuse. The force is sufficient to hold the assembly together and provide sufficient contact pressure to carry at least a small test current when the machine is at standstill, yet not great enough to cover mechanical failure when at full operating speed. As shown, the spring means comprises insulating posts 22 attached to the base member 11 and supporting an X-shaped spring 23 bolted at 32, via shims 24, to the heat sink 21. Within the hollow base member 11, of A.C., are secured, e.g. by a resin, one or more capacitors 14 connected together by the member itself and leads 15 and a terminal 16 which latter is connected via a steel rod 18 to the connecting means which is a Cu strap connector 31. There may be two rectifier wheels, each containing a plurality of modules 10 insulated therefrom by channels 44 which also contain terminals 48 having leads 53 connecting to leads 54 from the exciter 3 Ph rotating armature winding 64. The wheel rims 42 form D.C. output buses 65, 66 connected via radial connectors 57 and shaft bore axial leads 56 to the generator field winding 67.
Patent GB-140451-A (GB)
Title: Improved means of changing the poles of four phase windings of alternating-current dynamo-electric machines
IPC: H02K17/14
Filed: 1920-03-18
Abstract: 140,451. Siemens - Schuckertwerke.. June 30, 1917, [Convention date]. Motors, controlling.-To reduce the number of switches required for changing the pole-number of a four-phase winding, the connexions of the windings are altered from star to mesh or vice versa on passing from one pole-member to the other. The coils in the winding are so arranged that in passing from the star to the mesh connexion, the connexion between the two coils in each starblanch is not altered. Figs. 3a and 3b illustrate one manner of effecting the change-over, the currents of the four phases I, II, -I, -II being introduced in each case at the places shown by the arrows. Figs. 4a, 4<b>, and 5b show the conversion of a four-phase mesh winding, Fig. 4a, into a star winding with two coils in parallel in each branch, Fig. 4b, or into an arrangement with a short-circuited diagonal, Fig. 5b.
Patent GB-492316-A (GB)
Title: A manufacture of absorptive materials, especially applicable for cation exchange
IPC: C01B31/16
Filed: 1937-03-19
Abstract: Base exchange materials are made by treating coal, anthracite or wood with sulphuric acid, sulphur trioxide or amidosulphonic acid in the presence of a mercury salt.  Potassium bichromate, boric acid, aluminium chloride or boron fluoride may also be added.  The coal or anthracite may be treated with anthracene oil before the treatment with acid, and wood and other materials rich p  in water may first be dried.  The acid may be added in portions of increasing concentration.  In an example a mixture of anthracite, potassium bichromate and mercury sulphate is treated with fuming sulphuric acid containing 20 per cent SO3 a quantity of fuming sulphuric acid containing 65 per cent SO3 being then added gradually.  The temperature is maintained at 150 DEG  C. for a few hours and the mixture then cooled.  Excess acid is drawn off and the residue washed with water and sieved into fractions of various grain sizes.  In another example, boric acid is added instead of potassium bichromate.ALSO:Base exchange materials are made by treating coal, anthracite or wood with sulphuric acid, sulphur trioxide or amidosulphonic acid in the presence of a mercury salt.  Potassium bichromate, boric acid, aluminium chloride or boron fluoride may also be added.  The coal or anthracite may be treated with anthracene oil before the treatment with acid, and, wood and other materials rich in water may first be dried.  The acid may be added in portions of increasing concentration.  In an example a mixture of anthracite, potassium, bichromate and mercury sulphate is treated with fuming sulphuric acid containing 20 per cent SO3, a quantity of fuming sulphuric acid containing 65 per cent SO3 being then added gradually. The temperature is maintained at 150 DEG  C. for a few hours and the mixture then cooled.  Excess acid is drawn off and the residue washed with water and sieved into fractions of various grain sizes.  In another example boric acid is added instead of potassium bichromate.
Patent GB-879335-A (GB)
Title: Improvements in or relating to pumps especially for hydraulic pit props
Inventor: WILSON JOHN JAMES
IPC: E21D15/45
Filed: 1958-03-13
Abstract: 879,335. Reciprocating pumps. DOWTY MINING EQUIPMENT Ltd. March 5, 1959 [March 13, 1958 ; Oct. 28, 1958], Nos. 8139/58 and 34511/58. Class 102(1). A hand operated reciprocating pump, preferably arranged in an hydraulic pit prop, is provided with inlet and outlet valves wherein the inlet valve allows low pressure leakage from the pumping chamber so that the hand actuating control may be moved without the pump delivering liquid. In the embodiment shown, the piston 28 draws liquid from the reservoir 30 past the inlet valve 25 and delivers the liquid through the outlet valve 22 to the pressure chamber 13 of the prop. The inlet valve 25 is biased from its seat by a spring 26 and for low speeds of the delivery stroke of the piston 28 the liquid flows past this valve and back to the reservoir, but when the speed of the piston exceeds a predetermined value, the pressure in the pumping chamber closes the valve 25 and liquid is delivered past the outlet valve 22. In a modification, the inlet passage opens into an annular recess controlled by a resilient annular valve member which is spaced from the recess in its natural state and closes this recess at the predetermined speed of the piston.
Patent GB-268546-A (GB)
Title: Electric steam boiler
IPC: F22B1/30
Filed: 1926-03-25
Abstract: 268,546. Schleck, E. March 25, 1926. Heating by electricity. - In electrically-heated boilers with generating elements comprising liquid-containing outer electrodes and inner electrodes dipping into liquid, several outer and inner electrodes are connected in series like battery electrodes, the supply voltage or the voltage of each phase of the supply being distributed over several elements. In a boiler for 3-phase current, six elements d, Fig. 1, are connected in each phase, the outer electrode a of the first element d being connected to the inner electrode i of the second element and so on as shown, or the inner electrodes of the first to the outer electrode of the second and so on, the final electrodes of the threephases being connected together and forming the neutral point. Insulating tubes r coaxial with the elements d may insulate the elements and connect them to a common supply pipe z for each phase, the supply and so the efficiency being regulated by a valve R<1> operated from the exterior of the boiler in an outflow pipe in front of the first element and the three pipes z being supplied from a centrifugal pump p. The tubes r may be of decreasing length corresponding to the voltage drop between the elements and the pipe z. Complete elements d are introduced into the boiler through a manhole and are series-connected within according to the supply voltage. The electrodes a may comprise thin seamless iron tubes. In a modification, short insulating tubes k, Fig. 4, at right angles to the elements d may connect the elements in one phase together and form the common supply pipe.
Patent GB-272173-A (GB)
Title: Drying agent for gases and application of same
IPC: C01B25/18
Filed: 1927-03-25
Abstract: 272,173. I. G. Farbenindustrie Akt.- Ges.. June 7, 1926, [Convention date]. Drying agents or desiccants.-A drying agent for gases consists of a solution of phosphorus pentoxide in phosphoric acid.
Patent GB-1050904-A (GB)
IPC: E21D15/44
Filed: 1965-02-25
Abstract: 1,050,904. telescopic pit props. K. GERLACH and H. GERLACH. Feb. 26, 1965 [March 6, 1964], No. 8314/65. Heading E1E. In a pit prop comprising a lower member 1 to form a cylinder for a pressurised fluid to which a friction lock 3 is permanently affixed an upper member or ram 2 releasably carrying a ram piston 8 at the bottom, slidably guided in the said cylinder wherein it forms a pressure-tight seal and axially-located friction liners 13, 14 in the lock 3 which guide the ram 2 when moving in the lower member 1 and limit its extendability, being easily removable from the lock 3 when the ram 2 has been extracted to leave a clear diameter therein equal to or greater than the diameter of the said cylinder a releasable connection between the piston 8 and ram 2 being at a point 11 below the prop head and above the top of the member 1, a rod 10 extending from the piston 8 to this point. In a modification the rod 10 is the outer of two telescoped tubes and has an adapter at the top for application of a prop-setting pistol, the inner tube extending through the piston 8 to an anchorage in the baseplate 4, openings in its wall communicating with the cylinder. The portion 8 has fins to support the ram bottom.
Patent GB-168927-A (GB)
Title: Improvements in or relating to the concentration of ores by flotation
IPC: B03D1/001
Filed: 1920-03-20
Abstract: Colloidal metallic oxides such as oxides of iron and aluminium are removed from ores, such as tin and tungsten ores, by the addition of a deflocculating agent to a pulp of the ore.  The deflocculating agent may be alkaline, such as sodium silicate, carbonate, or phosphate, or neutral, such as sodium oxalate or acetate, or acid, such as silicic acid sol.  Specifications 6148/08, [Class 82, Metals and alloys], and 107,401, [Class 82 (i), Metals, Extracting &c.], are referred to.
Patent GB-764756-A (GB)
Title: Improvements relating to multiple-carburetter arrangements for internal combustion engines
IPC: F02B61/02
Filed: 1955-03-23
Abstract: 764,756. Carburetters. GILERA, G. March 23, 1955 [Feb. 2, 1955; Feb. 2, 1955], No. 8475/55. Class 7 (3). In a four cylinder engine the carburetters 1, 2, 3, 4 are arranged as shown. In a two cylinder engine the carburetters are arranged as for the two centre cylinders in Fig. 3.
Patent GB-881097-A (GB)
Title: Improvements in lawn mowers
IPC: A01D34/42
Filed: 1958-03-17
Abstract: 881,097. Lawn-mowers. BANSOMES SIMS & JEFFERIES Ltd., and PLUMB, A. B. March 17, 1959 [March 17, 1958], No. 8554/58. Class 6(2). A lawn-mower comprising ground wheels or roller 1, a cutting cylinder 16 co-operating with a ledger blade 17, and an adjustable roller 36 for controlling the height of cut of the mower, is provided with a hood 8 of sheet metal, fibre glass or plastics material which substantially covers the ground wheels or roller and the cutting cylinder, the hood being provided with a slot through which the grass cuttings are discharged. Secured to the hood is a framework comprising two vertical plates 4 spaced apart by a cross member 5, the plates 4 supporting the axle 2 of the roller or wheels 1. Also two side plates 27 are bolted to the hood at 28 and 23, the bolts 23 serving as pivots for arms 22 carrying the cutter cylinder 16, and arms 26 supporting the adjustable roller 36. The cutter cylinder is driven from the wheels or roller 1 (which may be motor-driven), and is adjusted about the pivot points 23, against the action of springs 34, by means of screws 32. As shown in Fig. 2, the ledger blade 17 is fixed rigidly to the side plates 27, but in a modification the cutter cylinder is fixed and the ledger blade adjustable.
Patent GB-893215-A (GB)
Title: Improvements in or relating to shock absorbers for vehicles
Inventor: STARK HELMUT
IPC: F16F9/46
Filed: 1960-03-11
Abstract: 893,215. Hydraulic shock absorbers. HOESCH A.G. March 11, 1960, No. 8708/60. Class 108(3). In an adjustable hydraulic shock absorber an adjusting rod accessible from outside the cylinder is rotatable on ball bearings and projects into a hollow piston rod to vary the covering of damping passages. In one example an adjusting rod 10, Fig. 1, is rotatable through a rack and pinion 15, 16 in a housing 14 forming the connection for the hollow piston rod 6. The rod 10 is attached to an apertured disc 11 which is rotatable on ball bearings 12 within the piston 7 to vary the covering of passages 9 in the piston 7 and a cover plate 8. A valve plate 23 forms a compensating chamber in the end of the cylinder 1. In a modification the adjusting rod 10, Fig. 2, forms a metering pin and is rotatably mounted on bearings 26 in the upper end of the cylinder I and has a longitudinal groove 10<SP>1</SP> co-operating to restrict apertures 6<SP>1</SP> in the hollow piston rod 6. The groove 10<SP>1</SP> is narrowed towards the ends to vary the damping throughout the length of the stroke. Rotation of the rod by a lever 27 varies the covering of the holes 6<SP>1</SP>.
Patent GB-127398-A (GB)
Title: Improvements in or relating to the Manufacture of Sulphate of Ammonia.
Inventor: WILTON NORMAN
IPC: C01C1/249
Filed: 1918-05-28
Abstract: 127,398. Wilton, N. May 28, 1918. Ammonium sulphate.-Neutral ammonium sulphate is obtained by directly neutralizing the acid present in the crude crystals by treatment with a cold ammonical solution of ammonium sulphate, saturated or practically saturated with this salt, the degree of alkalinity of the solution being sufficient to neutralize the acid in the crystals and not substantially below 1 per cent of free ammonia. A suitable apparatus' for carrying out the process comprises an ammonia generator C, collectors D for pure ammonia solution, a drying- apparatus B, for example a centrifugal, a tank E in which the ammoniacal ammonium sulphate solution is prepared, and a second tank F into which the liquid from the tank E is pumped and from which it flows by a pipe H and rubber hose J to the dryer B. The ammoniacal ammonium sulphate solution is prepared by placing acid ammonium sulphate, for example drainings from an ammonium sulphate plant, in the tank E, and running in pure ammonia solution from the vessels D. In a modified form of apparatus, the dryer B and tanks E, F are mounted on a vehicle, and a prime-mover, for example a steam-engine, is provided which may be connected to the wheels of the vehicle or to the dryer; the vehicle also carries a tank containing pure ammonia solution for use in preparing the ammoniacal ammonium sulphate solution. The neutral sulphate is discharged from the dryer into a sack carried by a weighing- machine, which cuts off the discharge when the sack contains a predetermined amount.
Patent GB-452475-A (GB)
Title: Improvements in and relating to air space insulated trunk communication electric cables
IPC: H01B9/06
Filed: 1936-03-24
Abstract: 452,475. Cables. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. March 24, 1936, No. 8824. Convention date, May 29, 1935. [Class 36] In an air-space insulated trunk communication cable with one or more concentric or twisted double lines, the individual conductors of which are surrounded with spacing elements wound in open helical form therearound, the spacing elements 12 are formed of open or closed string windings, the string of which has a rectangular or approximately rectangular cross-section and consists of a rigid insulating substance, for example, polystyrol. Preferably, the rectangle of the cross-section of the string elements is curved convexly on the outer side of the string winding. Preferably, also, the direction of winding of the string forming the spacing elements 12 is of opposite hand to the direction of winding of the spacing elements round the conductors 10, 11. A closed sleeve of insulating material 13 in the form of a band winding is wound around each unit comprising a spacing element 12 and conductor 10 or 11.
Patent GB-804349-A (GB)
Title: Improvements in or relating to alkaryl sulfonates
IPC: C07C309/31
Filed: 1955-03-25
Abstract: A stable alkaryl sulphonate (i.e. free from "acid-drift") is prepared by reacting an alkaryl hydrocarbon with sulphur trioxide under sulphonating conditions, adding water to the resulting alkaryl sulphonic acid at a temperature below 100 DEG  C. in an amount varying between 0.5 and 20 parts per 100 parts of sulphonic acid, neutralizing the sulphonic acid and recovering the alkaryl sulphonate.  Specified alkaryl hydrocarbons are those prepared by alkylating in known manner benzene, toluene, xylenes, cumene, naphthalene, alkylnaphthalene, diphenyl, alkyldiphenyl, and chlorobenzene, or-toluene or -naphthalene with alkylating agents such as haloparaffins, olefins from dehydrohalogenated haloparaffins, alkyl sulphates, aliphatic alcohols and polyolefins such as polymers from ethylene, propylene, butylene or ethylene and propylene.  In examples: (1) dodecylbenzene is sulphonated with sulphur trioxide diluted with air, and water within the limits specified is added to the sulphonic acid, the results being compared with those obtained when using an excess of water (as ice) or when the addition of water is omitted; (2) dodecylbenzene and postdodecylbenzene (a mixture of mono- and di-dodecylbenzenes) are sulphonated by the process disclosed in Specification 804,346, the sulphonic acid obtained being diluted with water before neutralisation.
Patent GB-568921-A (GB)
Title: Improvements in or relating to pressure actuated valves
IPC: F15B1/02
Filed: 1943-06-03
Abstract: 568,921. Valves. BENDIX AVIATION CORPORATION. June 3, 1943, Nos. 8951 and 8952. Convention dates, June 3, 1942, and Dec. 12, 1942: [Class 135] In a pressure-regulating valve having inlet, reservoir and accumulator connections and a byepass valve opened when the accumulator pressure exceeds a predetermined value by pressure-responsive means, the said means comprise two valves controlling passages leading from a chamber behind the byepass valve to the reservoir and accumulator connections respectively. As shown in Fig. 1, the regulator valve has a port 25 connected to the delivery of a pump 14, a port 31 connected to an accumulator 20, and a port 52 connected to a reservoir 10. Liquid is byepassed when the constricted portion 58 of a valve 54 allows communication between the port 25 and a bore 50, and when a valve 80 on a plunger 78 allows communication between the bore 50 and port 52. The valve 54 is urged to the right by a spring 56 and by any pressure conveyed from the bore 50 through a passage 104, and to the left by pressure conveyed from the port 31 through a passage 102. A hollow member 84 fitted within the plunger 78 and acted on by a spring 94 has a valve face 86 adapted to seat in an orifice in the plunger, and engages the shank of a fluted member 92, the other end of which engages a ball valve 70 acted on by a spring 72. When the accumulator pressure in the port 31 reaches a predetermined value, the valve 70 closes and the valve 86 opens. Pressure behind the plunger 78 is thus relieved through an aperture 85 and the interior of the member 84 to the port 52, so that pressure in the bore 50 acts on the plunger 78 to establish communication between the bore 50 and the port 52, which is subsequently closed at a predetermined lower accumulator pressure which permits closure of the valve 86 and opening of the valve 70. In a modification, the ball valve 70 is replaced by a poppet-type valve. In a further form, the pump port 120, Fig. 3, is connected to the accumulator port 122 through a passage 126 provided with a check valve 128, and communication with the port 124 connected to the reservoir 10 is controlled by a plunger 148 urged towards the left by a spring 150. A member 154 movable in the plunger has a bore on which a spring-pressed ball 160 is adapted to seat and a passage 156 leading to the bore. A ball 174 is adapted to seat in a bore in a fixed member 142, piston members 162, 170 are interposed between the balls 160, 174 and passages 180, 182, 184 are provided. When the accumulator pressure reaches a predetermined value, the valve 174 is closed and the valve 160 opened, and the plunger 148 is moved to the right owing to the relief of pressure from the chamber between it and the member 142.
Patent GB-1255897-A (GB)
Title: Process for obtaining a uninhibited insulating oil for transformers
IPC: C10G67/14
Filed: 1970-02-25
Abstract: 1,255,897. Hydrogenating and refining oils. EMPRESA NACIONAL CALVO SOTELO DE COMBUSTIBLES LIQUIDOS Y LUBRICANTES S.A. 25 Feb., 1970 [25 Feb., 1969], No. 9094/70. Heading C5E. Insulating oils for transformers are made from hydrocarbon oils having viscosities between 1À5 and 6 centistokes at 99‹ C. by catalytic hydrogenation in the presence of hydrogen to modify the chemical structure of the oil and to eliminate O, S or N atoms from the oil, distillation of the hydrogenated oil, dewaxing of the distillation residue by fractional crystallization and treatment of the dewaxed oil with an adsorbent earth. The hydrogenation can be carried out at 300-450‹ C. and 80-350 atmospheres using a catalyst of Ni and W sulphides on alumina or of Ni and Mo sulphides on silica-alumina. A feed oil, e.g. a spindle oil, is hydrogenated at 1, separated under high pressure at 2 to provide recycle hydrogen and then under low pressure at 3, the oil is distilled at 4 to remove gas, gasoline and gas oil fractions and to recover a bottoms oil. The bottoms oil is dewaxed by cooling with a mixture of methyl ethyl ketone and toluene to precipitate wax and then contacted with an adsorbent earth.
Patent GB-680284-A (GB)
Title: Improvements relating to the fluorescent coatings of fluorescent electric discharge lamps
IPC: C09K11/08
Filed: 1949-04-04
Abstract: 680,284. Luminiscent materials. BRITISH THOMSON-HOUSTON CO., Ltd., RUFF, H. R., and WELLS, R. S. March 24, 1950. [April 4, 1949], No. 9120/49. Drawings to Specification. Class 39(i) A luminescent material excited by a mercury vapour discharge consists of an inner layer of barium chloro-phosphate actuated with uranium, and an outer layer consisting of a mixture of calcium fluoro-chloro-phosphate actuated with antimony or manganese, and cadmium borate actuated with manganese. The barium chlorophosphate layer absorbs part of the unwanted 4538A mercury line and emits light at about 5200Š to assist in filling up the gap in the green region of the resultant emitted light, which corresponds to a colour temperature of about 2500- 3000‹K. Specification 3574/46, (as open to inspection under Sect. 91). is referred to. Reference has been directed by the Comptroller to Specification 592,157.
Patent GB-639845-A (GB)
Title: Improvements in rug making implements
IPC: D05C15/06
Filed: 1947-04-03
Abstract: 639,845. Sewing. HIRST, R. April 3, 1947, No. 9129. [Class 112] Tufting needles.-A yarn-carrying tufting needle 7, shown as of the tubular type, carries a peg 13 adapted to pierce the base fabric when the needle is thrust in ; the next insertion of the needle is made through the hole formed by the peg, thus ensuring uniform spacing of the stitches. In the form shown the peg 13 is carried on an adjustable gauge plate 10 determining the length of loop in the usual way ; it may be attached adjustably to the gauge plate to allow of the stitch spacing being varied. Two or more needles, with corresponding pegs, may be carried on one handle.