baber/WOPTO huggingface dataset:
Patent GB-1000291-A (GB)
Title: Improvements in or relating to high tension rectification circuits
Inventor: NICHOLLS NIGEL SUTTON
IPC: H02M1/04
Filed: 1960-05-16
Abstract: 1,000,291. Transformers. MINISTER OF AVIATION. July 27, 1961 [May 16, 1960], No. 17164/60. Heading H1T. [Also in Division H2] In a bridge rectifier having grid controlled rectifiers, firing pulses are obtained from a saturable transformer T, phase shift for control of the rectifier output being by means of bias D.C. windings 34, 35. One winding (34 or 35) is used to raise the instantaneous saturation current, and the other to lower it. A third pulse may be provided by the generator 15, between the first and second pulses.
Patent GB-516168-A (GB)
Title: Improvements in electron discharge tubes
IPC: H01J19/02
Filed: 1938-05-17
Abstract: 516,168. Thermionic valves. DEHN, F. B. (Hygrade Sylvania Corporation). May 17, 1938, No. 17176/39. Divided out of 516,110, and 516,111, under which a Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 29, 1938. [Class 39 (i)] The envelope 31 of a thermionic valve is closed at its lower end by a flat header 32 of insulating material such as glass through which are sealed a number of rigid contact pins 39, and encloses an electrode assembly including an indirectly heated cathode, and an insulating bridge 115 is supported on the inside of the header and carries metal tabs 119 for the purpose of connecting the ends of the fine filamentary cathode heater to its contact pins. In the arrangement described, the electrode assembly comprises an indirectly heated cathode, control, screening and suppressor grids and an anode, mounted between mica discs 45, 46 and completely enclosed in a metal shield consisting of a cylinder 66a with end closure discs 66b, 49. The shielding effect is continued exteriorly of the envelope by a metal cap 70 which overlaps the lower edge of the interior shield, and has openings for the passage of the contact pins and a central tubular extension 75 with a locating rib 76 adapted to contact with a grounded socket. On the inside of the header is disposed a metal disc 110 wlich is surrounded by the contect prongs and carries channel members 113 adapted to shield the anode and control grid pins from each other. The bridging member 115 is mounted in slots in the channel members 113. The exhaust tubulation 44 passes through a central hole in the disc 110 and is protected by the tubular metal extension of the cap 70. A getter cup or carrier 66d is supported centrally above the mount by a wire 66e welded to the internal shielding member. Specifications 516,110, 516,111, and 516,167, are referred to.
Patent GB-476969-A (GB)
Title: Improved means for preparing sliced vegetables or fruits
IPC: B26D1/29
Filed: 1936-06-20
Abstract: 476,969. Slicing fruit or vegetables. KING, R., and CURWEN, G. June 20, 1936, No. 17210. [Class 5 (i)] A machine for producing slices of vegetables or fruit, and more particularly of potatoes, wherein the cut faces are grooved, and the grooves on one side intersect the grooves on the other side, comprises one or more rotary holders for the potato to be sliced, a holder consisting of a tubular container in which the potato is inserted, and a plunger in the container which presses the potato resiliently against a moving knife blade. As shown, rotary knives are used. The potatoes are inserted into the holders 21 through apertures 21c, the plungers 22 being withdrawn by the handles 40. The plungers are advanced to apply the feed pressure to the potatoes by weights 39 and cables 37. The holders are mounted for oscillation on rollers 29, 30 and are retained in position thereon by rollers 31, 32 on cross pieces 33 secured by wing-nuts 35. The knives 18 are corrugated and are secured over radial slots in a disc 17 driven through worm gearing 13, 15 by a motor 9, the knife shaft 16 being connected by linkage 43, 44, 45, shaft 46, and linkage 47 ... 50 to the holders 21 so that they are oscillated in synchronism with the knives. The plunger rods 26 are splined at 28a to the covers 28 of the holders 21 so that they oscillate therewith, and to prevent sticking of the potatoes to the plunger owing to deposition of starch, a front plate 24 of glass is provided, the plate being embedded in a dished disc 23 of lead. The cutter disc is housed in a casing 41 terminating at its lower portion in a discharge shoot 41a. The number of knives and holders employed may be varied, e.g. a radial row of holders and a corresponding radial row of knives, or a circular row of holders and a circular row of knives may be provided. The holders may be oscillated manually. According to the Provisional Specification, the slices are cut by a reciprocating knife blade comprising a plain portion offset from the corrugated cutting part, the potato being pressed against the plain part at the beginning of the cutting stroke. The turning of the holder is effected by a pawl on a frame carrying the blade striking an abutment on the holder. The pawl is adjustable for producing different angular movements of the holder.
Patent GB-719668-A (GB)
Title: Improvements relating to the control of electrically driven conveyors
Inventor: SHAW SAMUEL ELIJAH
IPC: H02P25/18
Filed: 1952-07-08
Abstract: 719,668. Control of A.C. motors; controllers. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. May 8, 1953 [July 8, 1952], No. 17227/52. Class 38(3) An electric motor 1 driving a chain grate stoker is supplied with intermittent alternating-current through a contactor 2 having an operating coil 3, and the main supply is fed through a selector switch 4 to a number of unit switches 7A-7F. A continuously rotating pilot motor 5 drives a cam 6 about which the unit switches are uniformly distributed, so that each switch is closed for a part of the rotation of the cam. Ganged isolating switches. 8A-8F are connected to corresponding switches 7A-7F, and the selector switch 4 operates in such a manner that a selected number of isolating switches are closed and the rest are open so that a similar number of unit switches are effective and the remainder non-effective, whereby the motor is energized during each revolution of the cam according to the ratio of the number of effective to the number of non-effective switches. Preferably, the cam is dimensioned so that, when one unit switch has been closed, it will not re-open until the next unit switch is closed. The cam may be replaced by relatively rotating commutators and brushes.
Patent GB-765190-A (GB)
Title: Improvements in or relating to the treatment of electric semi-conducting materials
Inventor: MAYER SIMON ERNST
IPC: H01L21/00
Filed: 1954-06-11
Abstract: 765,190. Semi-conductor devices. STANDARD TELEPHONES & CABLES, Ltd. June 3, 1955 [June 11, 1954]. No. 17285/54. Class 37. A method of producing a PN junction in a body of semi-conductor by thermal diffusion of an appropriate impurity into one surface of the body is characterized in that the remaining surfaces of the body are coated with an element which is different from, but isomorphous with, the semi-conductor material so that unwanted spreading of the impurity is prevented. The element may form part of a compound. In one example a body 1 of N-type germanium is provided with a thin film 3 of silicon monoxide by evaporation, and a film 4 of acceptor impurity, such as gold. Heat treatment for 4 hours at 850 C. is then applied to diffuse the gold into the germanium, to provide a PN junction. Gold may also be applied to the opposite face and diffused, so as to provide a PNP arrangement. Alternatively, an NPN arrangement can be provided by applying a donor impurity to the converted P region, and diffusing, to reconvert a region back to N-type. Silicon may be used in place of germanium, and aluminium, gallium or indium as acceptors, and phosphorus, arsenic or bismuth as donors. Other elements from Group 4 may be used as the isomorphous element. After the diffusion heat treatment, annealing at a temperature of 500 C. may be provided to remove lattice defects. Specification 753,133 is referred to.
Patent GB-294237-A (GB)
Title: A process for treating aluminium or other light metals
IPC: C25F3/04
Filed: 1928-06-15
Abstract: 294,237. Electrolux, Ltd., (Assignees of Platen-Munters Refrigerating System Aktiebolag). July 22 1927, [Convention date]. Aluminium and other light metals, treating; coloured surfaces, producing.-An article of aluminium, beryllium or other light metal is etched by anodic treatment in a bath containing a fluoride e.g. fluoride of sodium, potassium or ammonium, and then subjected to further anodic treatment in an electrolyte adapted to cause chemical alteration of the metal surface. The colour may be varied by addition to the first bath of an acid e.g. hydrofluoric acid, or an alkali e.g. ammonia or ammonium carbonate or bicarbonate. In the latter case a protective coating is produced. The article may be cleaned after etching by a short treatment as cathode. In an example the article is treated anodically in a bath consisting of a 1 per cent solution of potassium fluoride to which is added 1-5 per cent ammonium carbonate ; it is then washed in hot water and anodically treated in ammonium carbonate solution. According to the Specification as open to inspection under Sect. 91 (3) (a) the second anodic treatment may be omitted, and the article may be dipped in wax after the first anodic treatment. This subject-matter does not appear in the Specication as accepted.
Patent GB-437051-A (GB)
Title: The manufacture of oestrogenous products
IPC: A61K36/48
Filed: 1934-06-12
Abstract: Oestrogenous products, similar in their action to follicle hormones, but differing therefrom chemically and by reason of their activity when administered by the mouth, are obtained from the tubers of the Siamese plant Butea Superba (Kwao Kua) by extraction with a volatile solvent such as alcohol, methyl alcohol, or acetone.  The Specification as open to inspection under Sect. 91 refers also to the use of other parts of the plant Butea Superba, and of other plants of the family leguminosae, and states that other processes, known for obtaining follicle hormone from animal products, may be employed for isolating the active products.  This subject-matter does not appear in the Specification as accepted.
Patent GB-236735-A (GB)
Title: Improvements in electric cooking appliances
IPC: F24C7/00
Filed: 1924-07-21
Abstract: 236,735. Lyons & Co., Ltd., J., and Douglass, P. G. July 21, 1924. Grilling and toasting apparatus.-In electric cooking-appliances of the type comprising a casing, a pair of heating elements, a detachable grid between the elements for supporting the food, and a controlling switch, the heating elements are composed of a plurality of pairs of horizontal resistances superimposed to form vertical walls and the grids are mounted on horizontal slides between the elements. The casing b has pairs of uprights h at either end upon which the elements that are of conventional helically wound wire construction are mounted. The grids c are carried by a cross piece d mounted in guides e. A drip pan j and drain k is fitted to the bottom of the casing. Copper or other reflecting plates are fitted behind the elements, and are detachably mounted.
Patent GB-1131554-A (GB)
Title: Improvements in processes and apparatus for manufacturing corrugated asbestos-cementslabs
Inventor: PASQUALE CAMILLO
IPC: B28B1/52
Filed: 1967-04-17
Abstract: 1,131,554. Moulding corrugated fibrocement slabs. C. PASQUALE, and A. C. PASQUALE, [trading as R.C.M. REVISIONE COSTRUZIONE MACCHINE S.N.C.]. 17 April, 1967 [15 April, 1966], No. 17461/67. Heading B5A. Corrugated fibrocement slabs are made by longitudinally trimming a plastic fibrocement slab as it is fed to a cutting station, stopping and transversely cutting the slab at the cutting station, picking up and corrugating the slabs on a corrugated suction head, and depositing the slabs in a stack, the slabs alternating with shaped formers. As shown, plastic fibrocement slab N is fed in the direction of arrow F along conveyer 8 up to a point set by stops, longitudinal cutting being performed by rotary cutters 11 adjustably fitted on bar 13. The slab is transversely cut along lines t 1 , t 2' , t 3  by rotary cutters 19 driven by motors mounted on beam 18, the whole assembly moving on wheels 16 and rails 14 to traverse the slab. Suction forming device 2 which has a corrugated lower face is placed on to the slabs and by applying suction shapes and lifts the slabs and deposits them in a pile between suction heads 2 and 3; suction head 3 providing shaped formers to the stack from another pile.
Patent GB-1094810-A (GB)
Title: Unsaturated 4,5-seco-steroid compounds, and processes for their preparation
IPC: C07J75/00
Filed: 1965-11-04
Abstract: Novel 13b ,17a  - dialkyl - 4,5 - seco - 18,19-dinor - pregna - 9,11 - diene - 3,5,20 - triones of the formula <FORM:1094810/C2/1> wherein R and R1 each represent an alkyl group containing from 1 to 4 carbon atoms are obtained by reacting the corresponding 3-chloro-13b ,17a  - dialkyl - 4,5 - seco - 18,19 - dinor - pregna - 2,9,11 - triene - 5,20 - dione with an acid hydrolysing agent, e.g. sulphuric acid.
Patent GB-1505362-A (GB)
Title: Orthodontic appliances
IPC: A61C7/12
Filed: 1975-04-28
Abstract: 1505362 Orthodontic appliances M WALLSHEIN 28 April 1975 17506/75 Heading A5R [Also in Divisions C3] An orthodontic appliance comprises a plurality of brackets 2 for receiving an arch wire 4 and an elongate elastic band 8 of non-uniform cross section, whereby, during fitting of the appliance, the band is woven in a stretched condition between brackets 2 to extend through channels at the top and bottom of each bracket 2 and to grip the end edge of the channels with wider diameter portions. Various alternative forms of the elastic bands are proposed, Figs. 2-11 (not shown).
Patent GB-236941-A (GB)
Title: Improvements in and relating to polishing lathes
IPC: B24B41/04
Filed: 1925-07-08
Abstract: 236,941. Lang, R. July 8, 1924, [Convention date]. Spindles and spindle-mountings.-A polishing- lathe is provided with a three-armed frame 2 carrying two aligned spindles 6, 7 which are mounted in ball bearings 4 and are independently driven by fast and loose pulleys 8, 9. A thrust bearing 11 is located between the spindles.
Patent GB-310226-A (GB)
Title: Improved flux for the welding or soldering of aluminium and other metals
IPC: B23K35/36
Filed: 1928-06-16
Abstract: 310,226. Reuss, W. June 16, 1928. Addition to 296,923. Fluxes.-15 parts of common salt and 1 part of sulphuric acid are added to 30 parts of the flux consisting of equal parts of borax, boracic acid. and caustic potash described in the parent Specification.
Patent GB-340966-A (GB)
Title: An improved electrical pocket-lamp pencil
IPC: B43K29/10
Filed: 1929-06-07
Abstract: 340,966. Pencil holders ; lamps. WAGNER, J., 21, Seidlgasse, and SCHÍTZ, O., 10, Weissgõrberlõnde, both in Vienna. June 7, 1929, No. 17518. Convention date, April 27. Void [Published under Sect. 91 of the Acts.] Addition to 340,957. [Class 146 (iii).] In a combined pocket lamp and pencil holder of the type described in the parent Specification, the lens, of transparent artificial resin or the like, is removably attached to the metal lamp casing 1 by a cupshaped connecting-element 4. The element 4, which is preferably formed of artificial resin, is secured in place by the lamp bulb 2, and is formed with an external screwthread for attachment of the lens.
Patent GB-607209-A (GB)
Title: Process for producing steel with a low nitrogen content in the converter
IPC: C21C5/28
Filed: 1945-07-10
Abstract: Steel having a nitrogen content of 0.004-0.01 per cent is produced in the converter by adding rolling mill scales during p  the blowing of the metal without interruption of the blowing. The weight of the scales used is preferably 3 per cent by weight. Specification 529,772 is referred to.
Patent GB-530642-A (GB)
Title: Improvements in and relating to the production of polymers of isobutylene
IPC: C07C5/333
Filed: 1939-06-16
Abstract: 530,642. Polymerized isobutylene dehydrogenating isobutane. SYKES, P. H., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. June 16, 1939, No. 17676. [Class 2 (iii)] Solid polymers of isobutylene are prepared by passing isobutane over a dehydrogenating catalyst comprising a compound of chromium, molybdenum, tungsten, uranium, vanadium, columbium, tantalum, titanium, zirconium, cerium or thorium, preferably supported on a refractory carrier, at a temperature between 400‹ and 700‹C., cooling the resulting gases to condense liquid isobutylene and any unchanged isobutane, and polymerizing the isobutylene in the liquid condensate, without any purification treatment, in the presence of an inorganic halide polymerization catalyst at a temperature below -7‹C. Dehydrogenating catalysts specified are a mixture of alumina and chromium sesquioxide prepared for example as described in Specification 484,417, [Group III], oxides of the other metals specified above deposited on alumina, bauxite, magnesia, kieselguhr, crushed silica or crushed firebrick, or chromium sesquioxide deposited on refractory supports other than alumina, as described in Specifications 483,184, 483,190, and 483,192, aluminium chromite, and chromium sesquioxide. Polymerization catalysts specified are boron fluoride or chloride and aluminium chloride or bromide, which may be dissolved in solvents, e.g. carbon disulphide, ethylene dichloride or trichlorethane. The isobutane used should be free from impurities and may be obtained from gases produced in the destructive hydrogenation of coal or oil or from natural hydrocarbon gases. In examples, isobutane is passed over an alumina-chromium sesquioxide catalyst at 540‹C. and the liquid condensate either (1) polymerized in the presence of boron fluoride at a temperature of -80‹C. rising to -50‹C., or (2) mixed with hexane and polymerized at - 75‹C. in the presence of boron fluoride.
Patent GB-474591-A (GB)
Title: Dielectric member more particularly for use in television transmitters
IPC: H01J29/43
Filed: 1937-06-25
Abstract: 474,591. Glass manufacture. STANDARD TELEPHONES & CABLES, Ltd. June 25, 1937, No. 17724. Convention date, Aug. 27, 1936. [Class 56] [Also in Groups XL, XVI, and XXXVI] A dielectric element for use in a condenser, as an insulating support for material which emits secondary electrons or as the base plate of a mosaic screen in a cathode-ray tube, is formed of glass the centre 21 of which has been etched away until it is very thin but supported by the thicker edge or border 22. To form the plate a sheet of glass has its edge coated with beeswax and the centre treated' with hydrofluoric acid either on both sides or only on one side ; the treatment may be effected in stages 'with acid of varying concentration. A mixture of hydrofluoric acid, sulphuric acid and water may be used as the etching means with silver chloride or a mixture of silver chloride and iodide as the resist.
Patent GB-1314724-A (GB)
Title: Thermoluminescence type radiation dosimeter
IPC: G01T1/11
Filed: 1970-04-14
Abstract: 1314724 Uses of luminescence MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 14 April 1970 [15 April 1969 (2) 30 April 1969 (2)] 17814/70 Heading C4S A dosimeter comprises two thermoluminescent elements 1 secured to a portable frame 4 and spaced apart by non-thermoluminescent material, the dosimeter having no heat source. Thermoluminescent crystals 2 of CaSO 4  : Tm; CaSO 4  : Dy; Li<SP>6</SP>F or Li 2 B 2 O 7  are sealed in glass ampules removably mounted in an Al or steel frame. For measurement the elements are heated to 300-400‹ C. by hot air. In another embodiment thermoluminescent material is moulded into a film with PTFE or polyamide and supported in a frame of Al, polyethylene or PTFE. Two elements may be mounted on a frame having a clip for securing to clothing, one element being within an Al cap. A dosimeter to measure complex radiation comprises a frame 14 supporting elements 15, 16, 17, 20, 21 sensitive to ionization radiation, and element 18 sensitive to neutrons and ionization radiation. Elements 15, 16, 17, 18 are equally sensitive to γ-radiation, the sensitivity being adjusted by applying heat resistant paint. Elements 16, 21 are surrounded by removable Pb and Cu shields 19, 22 to prevent penetration of X- and #-rays respectively.
Patent GB-246035-A (GB)
Title: Sliding window raising device with automatic locking
IPC: E05F11/38
Filed: 1925-07-11
Abstract: 246,035. Delage, L. July 11, 1925. Double holt fastenings.-A fastening combined with a vehicle window regulator comprises spring- pressed arms 21, 22 on the sash adapted to engage racks on the frame of the door cavity, the arms being released by means of a rod 6 slidably mounted in the hollow sash and levers 10, 11 which are pivoted in a casing on the sash and provided with ball-shaped ends. The rod is actuated by drawing the grip or push-piece 8 towards the fixed grip 8<a> prior to raising &c. the sash.
Patent GB-497762-A (GB)
Title: An improved process for preparing resistant varnish coating on wood
IPC: C09D161/06
Filed: 1937-06-26
Abstract: Solutions of urea-aldehyde resins preferably in alcohols, esters or ketones are added to the solutions of phenol-formaldehyde resin varnishes which are hardenable at low or ordinary temperature used according to the parent Specification.
Patent GB-569366-A (GB)
Title: Improvements in or relating to electrical connectors
IPC: H01R4/20
Filed: 1942-12-17
Abstract: 569,366. Jointing by stamping. AIRCRAFT-MARINE PRODUCTS, Inc. Dec. 17, 1942, No. 17961. Convention date, Dec. 3, 1941. [Class 83 (iv)] [Also in Group XXXVI] A terminal for a cable comprises a ferrule 12 that is crimped on to the end of the conductor 24, being formed from a blank that may also form a tag portion 13 for connection to a binding post, or a second ferrule for gripping the cable insulation 23. The crimped portion is formed by compressing arc-shaped areas 25 that leave a margin at the ends and middle 26 of the ferrule and also at the sides 27, these folded but uncrimped areas strengthening the ferrule and reducing the tendency to spring open. The areas 25 may be compressed successively and may extend across the slit 20 in the ferrule. The slit ferrule may be enclosed in a thin unslit sheath before compressing. This unslit sheath may extend over the insulation of the cable and may be flattened or crimped thereon. The relative widths of the parts of the blank are such that when the ferrule 12 is rolled, a stiffening brace 21 is formed at each corner of the shank 15.
Patent GB-356801-A (GB)
Title: Improvements in or relating to lead-calcium alloys for sheathing cables
IPC: C22C11/02
Filed: 1930-06-12
Abstract: 356,801. Lead calcium alloys for sheathing cables. STANDARD TELEPHONES & CABLES, Ltd., Columbia House, Aldwych, London.-(Assignees of Bouton, G. M.; 5, Sunset Avenue, Lynbrook, New York, U.S.A.) June 12, 1930, No. 18028. Convention date, Oct. 30, 1929. [Class 82 (i).] Lead alloyed with 0À02-0À1 per cent of calcium for use for cable sheathing, is melted and cooled slowly to a point below the solid solubility curve M-N separating the solid solution of calcium in lead a, from material in which Pb3Ca particles are precipitated, before extruding and then cooling rapidly. The alloy may be aged at room temperature for a period such as 1, 6 or 12 months.