baber/WOPTO huggingface dataset:
Patent GB-1120018-A (GB)
Title: Improvements in single-phase induction electric motor
IPC: H02K17/04
Filed: 1967-02-09
Abstract: 1,120,018. Induction motors. GENERAL ELECTRIC CO. 8 Feb., 1967 [7 June, 1966], No. 6020/67. Heading H2A. A single-phase induction motor is rendered self-starting without the use of quadrature windings by means of a magnetic restriction in the form of a radial gap 32 in the stator core and displaced from the direct axis 23, 24 in the direction of rotation. The gap 32 enters, or, as shown, nearly enters, a slot 17a displaced by an angle # from the direct axis. This produces a flux distortion which shifts the direct axis to this slot on axis 36, the quadrature axis being at 31, approximately 90 degrees away. The angle 0 is between 20 and 70 degrees and the slot is filled with resin. The concentric coils 25-29 give a sinusoidal ampere-turn pattern, and a method of measuring the winding reactance to determine the numbers of turns is described. In addition, a wide tooth may be used on axis 23, 24 and some teeth near this may be cut back to augment the flux-shift between the primary and quadrature flux (Fig. 7, not shown). Alternatively (Fig. 8, not shown), the teeth may be cut back in a continuously graded fashion to establish the axes, and the phase difference between them.
Patent GB-608560-A (GB)
Title: Improvements in screens for hackling machines and the like
IPC: D01B5/00
Filed: 1946-02-26
Abstract: 608,560. Hackling machines. MUSGRAVE & CO., Ltd., and STEWART, S. D. Feb. 26, 1946, No. 6049. [Class 120(i)] [Also in Groups XXIV and XXVIII] A screen for the sides of a hackling or like machine provided with dust extracting means comprises a roller type shutter 3 supported on a shaft extending across the top of machine end frames 1, 1 and sliding in guides 5, 5 secured to the end frames. The lower end 20 of the shutter abuts with sealing contact against a horizontal crossframe member 8 and apertures 18 are provided for inspection and draught purposes. A number of separate shutters may be provided side by side across the width of the machine in which case intermediate guiding means are provided.
Patent GB-508240-A (GB)
Title: Improvements relating to the electric transmission of power
IPC: H02M5/42
Filed: 1938-02-25
Abstract: 508,240. Converting ; transmission line arrangements. ALLGEMEINE ELEKTRICITATS-GES. Feb. 25, 1938, No. 6058. Convention date, Feb. 25, 1937. [Classes 38 (ii) and 38 (iv)] In a direct current power transmission system in which a rectifier supplies direct current to a line 1 for transmission to a distant point where it is converted back to alternating current by an inverter, the rectifier and inverter being of the kind employing an arc discharge, a stabilizing resistance 2 is connected in the transmission line 1. The resistance 2 may be wholly or partly short-circuited after starting by a switch 3 which is energized by closure of the main switch 4 for the associated rectifier or inverter and closes with a time delay. The resistance 2 may be subdivided, the parts being arranged at the opposite ends of the transmission. Reference has been directed by the Comptroller to Specification 219,026, [Class 38 (ii)].
Patent GB-248769-A (GB)
Title: Improvements in differential pressure gauges for measuring the flow of fluids in conduits
IPC: G01F1/37
Filed: 1926-03-05
Abstract: 248,769. B÷hme, M. March 9, 1925, [Convention date]. Liquid-level pressure-gauges.-In apparatus in which the movement of a float in one leg of the manometer is transmitted to an indicating or recording device by means of cam-slot, two camslots and two recording devices are provided one for each direction of flow of fluid in the conduit to which the manometer is connected. The movement of the float 4 is transmitted to a spindle 5 by an arm 6. The spindle carries two arms 7, 8 having cam-slots 9, 10 with which engages cam-followers 12 on recording arms 13, 14 swinging on the pivot 15. When no fluid is flowing in the conduit on either side of a constriction in which the manometer is connected. the float occupies the position shown. The arms 7 and 8 are connected to the spindle 5 by oppositely-arranged sector-shaped slots and pins so that when the float moves upward, the arm 7 alone is moved and when the float moves downwards the arm 8 alone is moved.
Patent GB-1221351-A (GB)
Title: Improvements in or relating to printed circuits
Inventor: FURNESS RALPH WILLIAM
IPC: H05K3/18
Filed: 1968-02-08
Abstract: 1,221,351. Printed circuits. R. W. FURNESS. 10 Feb., 1969 [8 Feb., 1968], No. 6274/68. Heading HlR. [Also in Division C7] A printed circuit is formed on a plastics substrate by coating with a sensitizing agent, e.g. stannous chloride, applying an activating agent, e.g. palladium chloride or silver nitrate, in the desired pattern using e.g. a brush, felt pen or printing block, and finally depositing nickel or copper by electroless deposition.
Patent GB-633330-A (GB)
Title: An improved method of bending glass sheets or plates
IPC: C03B23/031
Filed: 1948-02-28
Abstract: 633,330. Bending glass sheets. LIBBEYOWENS-FORD GLASS CO. Feb. 28, 1948, No. 6285. Convention date, July 14, 1939. [Class 56] A glass sheet is supported in a vertical position between opposed bending surfaces, the sheet being entirely within the area of the bending surfaces during the bending operation. The sheet is engaged at its upper edge, and near the vertical side edges, by two small hooks or tongs 6 and the convex and concave mould members 9, 10 are provided with recesses 19, 20 which receive the tongs when the members 9, 10 are brought together by the rams 13, 14. The upper edge of the sheet may thus be entirely within the area of the members 9, 10. The points of engagement, of the two tongs with the glass are nodes, i.e. the vertical edges of the sheet and the middle thereof are moved by the members 9, 10 in opposite directions, but the engagement points remain substantially stationary. The sheet may be suspended by the tongs in a vertical furnace A prior to bending, and after bending it may be annealed by slow cooling or tempered by chilling.
Patent GB-469340-A (GB)
Title: Improvements in and relating to electric insulators
IPC: H01B17/20
Filed: 1936-03-02
Abstract: 469,340. Insulators. BRITISH THOMSON-HOUSTON CO., Ltd. March 2, 1936, No. 6303. Convention date, March 1, 1935. [Class 36] An insulator comprises a body a of hard resin-impregnated fibrous material, such as paper, is provided with a coating c of rubber which is firmly attached to the body a by vulcanization. As shown, a metal fitting b is attached tc the end of the body a and the rubber coating extends over the ends of the fitting, as at d, e.
Patent GB-710536-A (GB)
Title: Fluid pressure brake apparatus
IPC: B60T15/30
Filed: 1952-03-11
Abstract: 710,536. Fluid-pressure brakes. WESTING- HOUSE AIR BRAKE CO. March 11, 1952 [March 26, 1951], No. 6309/52. Class 103(1) A triple valve for railway fluid pressure braking apparatus comprises means whereby the increase in volume of a control chamber 41, as a result of flexure of the diaphragm assembly, is prevented from reducing the pressure in the control reservoir 5 to such a degree that there would be delay in obtaining a sufficient pressure differential between the chambers 41 and 48 to move the slide valves 38 and 40. such delay undesirably slowing down an application of the brakes throughout a train. The means for preventing a reduction in pressure in the control reservoir 5 comprises the provision of a non-return valve 63, located in the manually operable release valve device 9, which allows fluid to flow from the auxiliary or supply reservoir 3 by way of passages 12 and 42 to make up the pressure in the control reservoir. The valve 63 is relatively large to provide a sufficient flow and is held shut by a spring 66, the pressure from which is the very minimum required to keep the valve on its seat and such that it will be opened. by a very slight differential between the pressures in the control reservoir 5 and supply reservoir 3. The hand release device 9 included on pivoted lever 57 which opens in succession first a valve 50 which vents the brake cylinder 4 and then a valve 49 which vents the supply or auxiliary reservoir 3. Further movement causes through spindle 68 a positive opening of the valve 63 to vent the control reservoir 5. The triple valve assembly includes a quick service valve device 7 and charging device 8 and is generally similar to that described in Specification 702,100.
Patent GB-725583-A (GB)
Title: Improvements in or relating to tubulous vapour generating and vapour heating units
IPC: F22B21/34
Filed: 1953-03-06
Abstract: 725,583. Water-tube steam boilers; steam superheaters. BABCOCK & WILCOX, Ltd. March 6, 1953 [March 6, 1952], No. 6352/53. Classes 123 (2) and 123 (3). A forced circulation water-tube steam boiler comprises a furnace 1 which is fired by pulverised fuel burners 2 and 3 and which is lined with studded, refractory-covered, superheater tubes 12, 17 and 57. The furnace is operated at ash-melting temperature, the slag which deposits on the furnace walls, &c., draining quickly therefrom and passing away through an outlet 35 in the furnace floor 10. The hot gases flow from the furnace through a slag screen 31 of superheater tubes and pass upwardly through a radiation chamber 39 lined with bare steamgenerating tubes the surface temperature of which, at least in the lower part of the chamber, is kept below 320 ‹C. so that any slag adhesions which may occur can be easily dislodged. The gases then flow successively through a lateral pass 41 and downflow and upflow passes 42 and 45 locating a convection superheater, a reheater and an economiser and pass to the stack through air heaters 46 and 48. In the lower part of chamber 39 are located auxiliary burners 52 and associated combustion air nozzles 53 which are used when starting up to avoid damage to the furnace superheater tubes. Burners 52 may also be used during operation to cater for variations in the demand on the unit, the burners 2 and 3 then being regulated in dependence on the final steam temperature.
Patent GB-165903-A (GB)
Title: Improvements in sparking plugs for electrical ignition systems
IPC: H01T13/56
Filed: 1920-03-03
Abstract: 165,903. Ogden, A. March 3, 1920. Sparking-plugs. - The earthed electrode is in the form of a ring 7 having one or more terminals 8 and clamped between shoulders in the casing and on a metal sleeve 4.
Patent GB-491571-A (GB)
Title: Improvements in or relating to puffed or expanded cereal products
IPC: A23L1/18
Filed: 1937-03-04
Abstract: Maize or similar cereal, either as grits or in the whole grain is cooked under pressure in water containing salt in solution und is then dried in a current of cold air till the moisture content falls to 33 per cent.  The treated corn is passed between rolls and reduced to very thick flakes which are again dried to bring the moisture content down to about 15 per cent.  These dried flakes are immersed in a solution of 12 lb. of sugar or other sweetening flavouring in 6 gallons of water until the solution has thoroughly saturated the flakes, after which they are drained on a metal screen, dried in a current of warm air to a moisture content of about 12 per cent and allowed to temper for 18 hours or more. The tempered flakes are toasted and puffed in a rotary gas or other oven at a temperature of between 400 and 450 DEG  F. and packed.
Patent GB-1356265-A (GB)
Title: Teaching and or self-teaching devices
IPC: G09B17/00
Filed: 1971-03-11
Abstract: 1356265 Educational appliance A S L OWENSMITH 8 June 1972 [11 March 1971] 6551/71 Heading G5G An educational appliance comprises a support A mounted horizontally by one end and being substantially segmentally shaped in end elevation, and a series of rings G which may be passed over the open end of the support and located thereon so as to be manually rotatable, each ring bearing circumferentially a series of consecutively numbered panels K bearing indicia. Each panel may be associated with a further number marked on the side J of its ring which identifies that panel on the adjacent ring which matches or is otherwise associated with the aforesaid panel; the student can thereby check the correctness of his panel-matching operation. The support is provided with grooves D which receive complementary flanges on the rings, and smooth teeth E which engage corresponding teeth H on the rings in order to provide positive horizontal alignment of the panels. The indicia may be formed on flexible strips which are adhesively or elastically applied to the rings. Alternatively the rings are provided with studs or slots to receive separate panels. The support may be of hollow construction and internally-lit so that the student can check his answer by switching on the light to reveal the correct answer transparently in the appropriate panel. Two such appliances may be linked together by their open ends. The indicia may be raised in relief for use by the blind.
Patent GB-745128-A (GB)
Title: Manufacture of organic hydroperoxides
IPC: C07C409/08
Filed: 1952-03-13
Abstract: Aromatic and hydroaromatic hydroperoxides are prepared by contacting in the liquid phase a hydroaromatic hydrocarbon or an aromatic hydrocarbon of the formula <FORM:0745128/IV(a)/1> wherein R1 is aryl, R2 is alkyl and R3 is hydrogen or alkyl, with oxygen or an oxygen-containing gas, at temperatures not above 130 DEG  C. in the absence of water and in the presence of an acid binding agent such as magnesium oxide, calcium carbonate, barium carbonate, sodium naphthenate or magnesium naphthenate, and an oil-soluble salt of a heavy metal such as cerium, iron, lead, copper, cobalt, nickel or manganese as a catalyst.  Specified hydroaromatic hydrocarbons are tetrahydronaphthalene and decahydronaphthalene.  In examples (1)-(3) cumene is oxidized to the hydroperoxide in the presence of cerium naphthenate using as acid binding agents calcium hydroxide, magnesium oxide, calcium carbonate, barium carbonate, magnesium naphthenate and sodium naphthenate; (4) cumene is oxidized to the peroxide in the presence of cobalt naphthenate using as acid binding agents magnesium oxide or sodium naphthenate; (5) isopropyl naphthalene is oxidized to the hydroperoxide by means of oxygen in the presence of cobalt naphthenate and magnesium oxide; (6) tetrahydronaphthalene is oxidized to the hydroperoxide by the method of (5) and (7) cumene is oxidized to the hydroperoxide by oxygen in the presence of cerium naphthenate and magnesium oxide.  Specifications 309,005, [Class 2 (iii)], 712,708 and 714,836 are referred to.
Patent GB-589189-A (GB)
Title: Improvements in and relating to aircraft power plants
IPC: F02K7/12
Filed: 1945-03-16
Abstract: 589,189. Aircraft jet - propulsion. BRITISH THOMSON-HOUSTON CO., Ltd. March 16, 1945, No. 6742. Convention date, March 20, 1944. [Class 110 (iii)] [Also in Group XXXIII] The exhaust of a gas turbine is led by a pipe 35 to the throat of a venturi 37 forming the entrance to a jet-propulsion tube 38. The open mouth is directed up-stream. Further air is drawn in at injector tubes 45. A mixture of air and exhaust gases is extracted at the pressure region of the venturi through openings 43 and provides the input for the centrifugal compressor 4 of the power unit. The compressed gases pass through a bladed diffussor 10 to a circular assembly of combustion chambers 18 and thence to a turbine 12. The turbine and compressor rotors are mounted on a shaft 1 supported by two ball bearings in a casing 2. Oil is supplied to the bearings by a pump through a pipe 31 and is drawn off by another pump through a pipe 33. The burners are supplied with fuel through a ring pipe 25 from a pump 27. Two power units may be mounted one on each side of an aircraft fuselage ; the jet tube being at the side of the compressor turbine assembly and enclosed in a tubular fairing having an air scoop for entraining air for the injector tubes 45.
Patent GB-277867-A (GB)
Title: Improvements in or relating to coat-hangers
IPC: A47G25/40
Filed: 1927-03-11
Abstract: 277,867. Lachmann, F., and Lachmann, K., (trading as Lachmann & Co., L.). Dec. 18, 1926, [Convention date]. Coat hangers. - A collapsible coat hanger having pivoted supporting - members 10 of U-sectioned sheet metal is provided with telescopic extension members 14 of similar section, the movement of which is limited by pins 19 in the parts 10 engaging slots 20 in the extension members. Gaps 17, 18 are formed in the upper edges of the parts 10, 14 to accommodate the hook 2 when the device is collapsed and folded. Knobs or pins 21 may be provided on the ends of the parts 14 to support other garments.
Patent GB-1099381-A (GB)
Title: Solid state field-effect devices
IPC: H01L29/786
Filed: 1965-02-17
Abstract: 1,099,381. Semi-conductor devices. RADIO CORPORATION OF AMERICA. Feb. 17, 1965 [March 3, 1964], No. 6946/65. Heading H1K. A field-effect diode having a rectifying action comprises a P or N-type semi-conductor layer 12 in contact with two electrodes 14, 16 of which one (16) also partly overlies a highresistivity film 18 which is in contact with the semi-conductor layer 12. The semi-conductor layer 12 makes an ohmic contact with electrode 14 and either an ohmic or a rectifying contact with electrode 16. Various shapes and arrangements of electrodes are described, all based on an insulating substrate 10 and having at least a portion of the high-resistivity film 18 interposed in the direct path through the semi-conductor layer 12 between adjacent edges s, d<SP>1</SP> of the two electrodes 14, 16. The addition of a third electrode (Fig. 8, not shown), located on the high-resistivity film yields a device combining the rectifying action of the field-effect diode with the characteristics of an insulated-gate field-effect thin-film transistor. A plurality of devices together with metal strip connectors may be deposited on the same substrate 10.
Patent GB-1036045-A (GB)
Title: Particle counter
IPC: G01N15/14
Filed: 1965-02-18
Abstract: 1,036,045. Counting particles. TECHNICON INSTRUMENTS CORPORATION. Feb. 18, 1965 [Feb. 27, 1964], No. 7015/65. Heading G4D. Particles, such as red or white blood cells, in a liquid medium are counted by passing a unit volume through a thin passage in a transparent tube (Figs. 3-6, not shown) a small but variable area of which is illuminated by a collimator 24. The absence of a particle allows the light to strike a dark disc 94 so as not to affect the countor. The presence of a particle, however, diffuses the light which is doublereflected by concave mirrors 86, 92 and activates photo-multiplier 132. A threshold circuit discards pulses of incorrect amplitude. The counter may operate an oscilloscope or penrecorder. Samples may be tested sequentially (Fig. 9, not shown) with automatic washing and removal of bubbles between successive tests.
Patent GB-589260-A (GB)
Title: An improved method of bonding together wood and metal
IPC: B60R13/02
Filed: 1945-03-21
Abstract: 589,260. Compound sheet materials. PRESSED STEEL CO., Ltd., and MATON, W. C. March 21, 1945, No. 7081. [Class 140] [Also in Group XXIII] For bonding together wood or metal to form a panel the metal sheet 11 is formed with perforations 16 and a sheet of veneer 21 is connected to the metal panel by means of an adhesive which penetrates the perforations and constitutes a plurality of holding keys 32 to assist the adhesive action. The perforations as shown in Fig. 5 may be countersunk, or formed with jagged or irregular edges. The adhesive may be a thermoplastic resin or a thermosetting resin which is cured in an autoclave, or an emulsion adhesive, or one setting by evaporation may be used. A backing sheet of fabric or fibre may be used under the veneer.
Patent GB-364419-A (GB)
Title: Improvements in or relating to the production of hydrogen from hydrocarbon gases
IPC: C01B3/38
Filed: 1931-03-07
Abstract: <PICT:0364419/III/1> p  In the catalytic production of hydrogen from hydrocarbon gases and steam the catalyst is periodically regenerated by the passage of steam alone.  Preferably a number of reaction chambers connected in parallel are used and each is regenerated in turn.  The catalyst may be nickel and/or nickel oxide with or without alumina, and the temperature of the catalytic reaction exceeds 1200 DEG  F.  The invention is particularly applicable to the treatment of hydrocarbons containing heavy unsaturated constituents.  In the illustrated apparatus the hydrocarbon gas is washed with caustic soda to remove sulphur compounds in the column 2 and after preheating in the coil 6 is passed to the reaction tubes 8.  Steam from the superheater 12 is also admitted to these. The gases leaving the tubes 8 traverse a second reaction chamber 19 in which carbon monoxide is converted into dioxide, and are finally passed through the scrubber 24 where carbon dioxide is removed.  To reactivate the catalyst in each of the tubes 8 the corresponding valve 10a, 10b, 10c controlling the admission of hydrocarbon is closed, but the passage of steam through the tube is continued.
Patent GB-286658-A (GB)
Title: Device for retarding or stopping a moved weight
IPC: G05G17/00
Filed: 1928-03-07
Abstract: 286,658. John, F. March 7, 1927. [Convention date]. Cushioning-devices. - The movement of a weight acted on by a force is retarded and limited by toggle linkwork. A weight 1 is carried by a lever 2 pivoted at 3 and is raised by a force 4 applied through the link 5 when the pawl 6 is disengaged from the end of the lever 2. The weight and lever then move from the position shown in Fig. 3, the toggle links 7, 8 being extended during this movement. A brake 12 may be applied to one of the toggle joints to increase the cushioning effect.
Patent GB-144589-A (GB)
Title: Manufacture of a solid fuel
IPC: C10L5/40
Filed: 1920-03-09
Abstract: 144,589. Elektrizitatswerk Lonza. Sept. 16, 1919, [Convention date]. Composition fuel.-A solid fuel for cooking and other purposes consists entirely or mainly of metaldehyde compressed or formed into a hard or coherent mass. A binding-agent, e.g. colophony, chloroform, or the like may be added to the metaldehyde before compression. Camphor, calcium salts, strontium salts, and the like may be added to obtain a fuel burning with a luminous or coloured flame, and, by adding disinfectants or perfumes, pastils, candles, or the like for fumigating and disinfecting purposes are made.
Patent GB-486990-A (GB)
Title: Improvements in the operating mechanisms of the slays of wide looms
IPC: D03D49/60
Filed: 1937-03-12
Abstract: 486,990. Beat-up mechanism. HINDLE, J. H., and HINDLE, SON, & CO., Ltd. March 21, 1937, No. 7244. [Class 142 (iii)] In a wide loom, a multiple crank-shaft A driven by one or more spur wheels from pinions on an auxiliary shaft, is mounted in front of the healds and has crank pins a connected by arms D to pins &c. b in the lay swords B. The end d of such arm enters a U-shaped recess b<1> in the sword and the crank web a<1> is made wide enough for the sword B to retreat therein. The arms D are made short to give a pronounced dwell to the lay when it is back. The crank and auxiliary shafts are mounted in bearings in end and intermediate frames.