baber/WOPTO huggingface dataset:
Patent GB-599512-A (GB)
Title: Improvements in and relating to blocking layer cells
IPC: H01L23/40
Filed: 1945-09-25
Abstract: 599,512. Asymmetrically-conducting resistances. PHILIPS LAMPS, Ltd. Sept. 25, 1945, No. 24904. Convention date, July 3, 1940. [Class 37] Separate rectifier elements 3, 4 on a common supporting plate 1 are connected together by wires 10, 11 and by the common supporting plate. The connecting wires 10, 11 are designed to act as current controlling elements, i.e. as fuses or steadying resistances. If a rectifier element should develop a fault, the individual connecting wire associated therewith will melt and disconnect the element so that the rectifier remains serviceable. Specification 601,872 is referred to.
Patent GB-875744-A (GB)
Title: Improvements relating to hydrostatic power transmissions
Inventor: PAGE GRAHAM DESBOROUGH
IPC: F16H61/40
Filed: 1959-07-22
Abstract: 875,744. Hydraulic transmission of power. AUSTIN MOTOR CO. Ltd. June 15, 1960 [July 22, 1959], No. 25094/59. Class 69 (2). A variable-ratio hydrostatic transmission comprises at least one auxiliary pump which primes the working circuit transmitting power from one or more positive-displacement pumps to one or more positive-displacement motors and also supplies a low-pressure control circuit, a starting valve which may be centrifugally or otherwise controlled and causes a rise in pressure in a circuit controlling the starting of the drive with increasing speed of the transmission input, and a relief valve which is set at a pressure always sufficient for priming the working circuit, provision being made whereby changes in pressure resulting from operation of the starting valve do not appreciably affect the pressure of delivery of the pump or pumps. The priming pump is connected to a line leading to the working circuit of the transmission and a low-pressure control circuit for effecting ratio changes, a line leading to a relief valve, and a line leading to a restrictor, in turn connected to a line leading to the starting valve and a line leading to a by-pass valve which is in a by-pass passage between the inlet and outlet of the positive-displacement pump. The restrictor, which may consist of a throttle or capillary device, restricts the flow to the starting valve to a small value and ensures that the priming line is maintained at a pressure determined by the relief valve. The starting valve may consist of a body which is rotatable about an axis A by the prime mover of the transmission and has a passage D connected to the line from the resistor so that fluid pressure acts on a piston valve PV to move a weight W against a spring S, the liquid passing through a passage E to a sump. As the speed of the prime mover is increased, centrifugal force moves the weight outwardly against the fluid pressure to close the passage E, the resulting increase in fluid pressure in the passage D acting to move the by-pass valve and reduce flow through the by-pass passage between the inlet and outlet of the pump so that fluid pressure is supplied to the motor.
Patent GB-390805-A (GB)
Title: Improved process for refining fatty oils
IPC: C11B3/06
Filed: 1931-09-07
Abstract: <PICT:0390805/III/1> Fatty oils, such as cotton seed oil, to be purified, are treated with an alkaline solution such as caustic soda which is added in the tank 1 or by a reagent meter 14, and the mixture is forced by a pump 2 through a coil 3 heated by a thermostatically controlled burner 4.  Impurities are separated in the centrifuge 6.  The oil is subsequently bleached with clays &c. and filtered.
Patent GB-481413-A (GB)
Title: Improved safety device for screw-and-nut gearing
IPC: B23Q5/58
Filed: 1937-09-15
Abstract: 481,413. Machinery guards; screw- and-nut gearing. SOC. ALSACIENNE DE CONSTRUCTIONS MECANIQUES. Sept. 15, 1937, No. 25115. Convention date, April 22. [Classes 80 (iii) and 80 (iv)] . In machines having a tool carrier B reciprocated by screw-and-nut gearing, a mechanical device for stopping the motion at the end of each traverse comprises rings G, G<1> fixed on the screw A and collars F, E, fixed on a nut D, rotatable freely in the carrier, each of which rings and collars is formed with a tooth T. When the teeth on a collar and ring engage, the nut is rotated with the screw and the motion of the carrier ceases.
Patent GB-360530-A (GB)
Title: An improved process and apparatus for the purification of hydrocarbon oils
IPC: C10G45/00
Filed: 1930-08-22
Abstract: <PICT:0360530/III/1> Gasoline and distillate oils containing mainly light naphtha fractions are purified by treating them with hydrogen at a temperature above 850 DEG  F. (preferably 900-1000 DEG  F.) and under a pressure in excess of 20 atmospheres.  The time of contact of the oil with the hydrogen is preferably adjusted so that not less than 5 per cent by weight of the oil is converted into fixed hydrocarbon gas, and preferably does not exceed 10 minutes.  The oil is fed by a pump 1 through a pipe 2 and heat exchanger 3 to a heating coil 8 and retort tubes 5 packed with catalysts, e.g. chromium and molybdenum oxides dried in lump form or mixed with a carrier, e.g. fuller's earth, pumice, &c.  The tubes 5 are of greater diameter than the coil 8, the respective diameters being 8-12 ins. and 2-4 ins. for a throughput of 1000 barrels of oil per day.  The products pass through the exchanger 3 to a cooler 13 and separator 14 from which the condensate is led off through a line 15 while gases pass off through a line 16 to a purification system 17 from which they are re-circulated by a pump 18, fresh hydrogen being added by a pump 19. The temperature of the furnace 6 is regulated by recirculating part of the flue gases through ducts 10 by a fan 11.  The furnace may alternatively be heated by lead or mercury vapour baths.  In starting up the process the retorts are preferably first heated by injecting controlled amounts of carbon dioxide which reacts with the hydrogen to form steam and methane with the evolution of heat.  The carbon dioxide may be added throughout the reaction.  A cracked distillate of 46,4 DEG  A.P.I. gravity obtained from Smackover crude and containing ,395 per cent sulphur is passed with hydrogen through a retort heated to 875-920 DEG  F. at a pressure of 200 atmospheres and provided with a catalyst, the time of treatment being 6-45 minutes. 88 per cent of the oil is recovered in liquid form. 10-15 per cent of oils boiling between 400 and 600 DEG  F. are preferably mixed with the naphtha.
Patent GB-600141-A (GB)
Title: Improvements relating to incinerators
IPC: F23G7/10
Filed: 1945-09-28
Abstract: 600,141. Incinerators. BARRETT, W. W., and BARRETT, H. A. Sept. 28, 1945, No. 25205. [Class 126] An incinerator for burning garden refuse and the like is rectangular in shape, each side being formed from a single sheet of metal 7 furnished with a series of louvrelike slots 7a. The vertical edges of the side plates are brought together in the angle of an L-shaped bar 8 to which they are firmly held by bolts 12; horizontal cross members 9 and 10 serve to strengthen the structure and also hold in place an 'expanded metal' mesh in the base. The bars 8 may project to form the legs of the incinerator or alternatively a single L-shaped bar may be bent to form a pair of legs while another bar is bent in the opposite direction so as to form a pair of corner posts, as shown in Fig. 4. The incinerator may have an inverted hopper-like lid 14 with a curved chimney which may turn about a vertical axis. The refuse is ignited through holes 7c.
Patent GB-852921-A (GB)
Title: Improvements relating to polymerisation
Inventor: BAWN CECIL EDWIN HENRY
IPC: C08F10/00
Filed: 1958-08-07
Abstract: Ethylenically unsaturated hydrocarbons are polymerized in the presence of a catalyst that comprises an aluminium halide and an aryl or substituted aryl-mercury compound, and a liquid medium that comprises a halogenated liquid or an organic substance which forms a halogenated liquid by interaction with the catalyst.  The aluminium halide may be aluminium chloride or bromide.  The organo-mercury compound may be diphenylmercury, di-(p-tolyl)-mercury, phenyl mercurichloride, or p-tolylmecurichloride.  The halogenated liquid may be inorganic or organic e.g. trichloroethylene, tetrachloroethylene, ethyl chloride, tert-butyl chloride, chloroform, carbon tetrachloride, ethylene dibromide, stannic tetrachloride, or silicon tetrachloride.  The organic substance which forms a halogenated liquid in the presence of the catalyst may be an alkane such as n-decane.  The catalyst may be supported on an inert carrier such as charcoal or silica gel.  The unsaturated hydrocarbons may be ethylene, propylene, a butylene, a pentene, 1 : 3-butadiene, styrene, alpha-methyl styrene and mixtures thereof.  The polymer was recovered by adding a mixture of ethanol and hydrochloric acid to the reaction mixture.ALSO:A catalyst for polymerizing ethylenically unsaturated hydrocarbons comprises an aluminium halide and an aryl or substituted aryl mercury compound and a halogenated liquid medium or an organic substance which forms a halogenated liquid in the presence of the catalyst.  The mercury compound may be diphenylmercury, di-(p-tolyl)-mercury, phenyl mercurichloride, or p - tolylmercurichloride.  The aluminium halide may be aluminium chloride or bromide.  The halogenated liquid may be organic or inorganic, e.g. trichloroethylene, tetrachloroethylene, ethyl chloride, tert-butyl chloride, chloroform, carbon tetrachloride, ethylene dibromide, stannic tetrachloride, or silicon tetrachloride.  The organic substance which forms the halogenated p  liquid may be an alkane such as n-decane.  The catalyst may be supported on an inert carrier such as charcoal or silica gel.
Patent GB-719558-A (GB)
Title: Improvements in and relating to air-cooled compressors
IPC: F04B39/06
Filed: 1951-10-31
Abstract: 719,558. Compressors. FLOTTMANN, F. H. Oct. 31, 1951 [Oct. 1, 1948], No. 25470/51. Class 8 (1). A compressor has a jacket 7 through which cooling air is circulated by a fan 8 and which has outlet apertures 9, 14 and a cooling chamber 10, open to the cooling air and disposed between a cylinder cover 3 and the cylinder head 4, is continued as a cooling passage 15 passing axially through the cylinder head and is traversed by small tubes 11 through which the compressed air is discharged from the cylinder. The cooling air is admitted to the cylinder, for compressing, through an inlet valve 5 which may alternatively be located on the side of the cylinder. A delivery valve 6 is provided.
Patent GB-655402-A (GB)
Title: Improvements in or relating to gas controlling apparatus for gas fired radiators
IPC: F24C3/12
Filed: 1947-09-18
Abstract: 655,402. Air-heating stoves. CARBONARO, M. C. Sept. 18, 1947, No. 25475. Convention date, Dec. 12, 1946. [Class 64(i)] [Also in Groups XI and XXIX] A gas-fired radiator has the burner 30 controlled by thermostatic apparatus housed in a casing 62. The products of combustion pass through a combustion chamber 26, a recuperator 27 and a chamber 28 to a flue 29. In the chamber 28 hot gases from the recuperator mix with atmospheric air from the lower part of the radiator which houses the thermal element 37. Air is heated by flowing over the combustion chamber and recuperator within the casing 58 and. grille 60 and circulates into the space to be heated, the grille also permitting radiation of heat from the combustion chamber.
Patent GB-1461420-A (GB)
Title: Hip joint endoprostheses
IPC: A61F2/36
Filed: 1974-05-17
Abstract: 1461420 Endoprosthetic hip joints FRIEDRICHSFELD GmbH STEINZEUG UND KUNSTSTOFFWERKE 17 May 1974 [19 May 1973] 25477/76 Divided out of 1461419 Heading A5R The Specification is concerned with an acetabular part of the hip joint endoprosthesis disclosed in the parent Specification 1461419, but the claims are directed towards an acetabular part 11 of Al 2 O 3  ceramic having a recess 12 in one face and being of triangular, rectangular, pentangular or hexagonal crosssection in a plane parallel to that of the one face, and having grooves 14, 16, (15), Fig. 2, (not shown), in its exterior surfaces for the growth and attachment of bone tissue thereto. If the cross-section is other than triangular, at least one of the corners of the acetabular part adjacent the one face is bevelled. The grooves may be undercut or dovetailed, and may be filled with bone chips from the patient during the operation and prior to implantation of the part to accelerate the growth of tissue into the grooves.
Patent GB-317854-A (GB)
Title: Manufacture of highly esterified acetyl-nitro-cellulose
IPC: C08B7/00
Filed: 1929-08-21
Abstract: 317,854. Naamlooze Vennootschap Fabriek van Chemische Producten, (Assignees of Elgersma, J. N.). Aug. 24, 1928, [Convention date]. Cellulose carboxylates.-Acetyl nitro-celluloses of high stability and high acetyl content are prepared by acetylating partly-nitrated cellulose with sulphuric acid or a derivative thereof as catalyst; removing the excess of acetic anhydride from the acetylating mixture, after acetylation is completed, by addition of the equivalent quantity of water or an alcohol and allowing the mixture to stand until the sulphuric acid in the esterified cellulose is replaced by a.cetic acid. The acetylating mixture can then be spun directly (see Specification 317,855) or the acetyl nitro-cellulose may be precipitated by the addition of water or other liquid, and after being washed and dried may be dissolved in acetone or other solvent, and used for the manufacture of films, filaments, or lacquers, or may be worked up with plasticizing agent to form celluloid or the like. Acetyl nitrocelluloses prepared in this manner are soluble in the usual solvents for secondary acetyl celluloses and possess valuable waterproof properties. In an example, nitro-cellulose having a nitrogen content of 2.2 per cent is acetylated in a mixture of glacial acetic acid, acetic anhydride and sulphuric acid, and then 50 per cent acetic acid is added while cooling and the mixture allowed to stand until analysis shows that all the cellulose sulphate has been converted into cellulose acetate, whereupon the acetyl nitro-cellulose is precipitated by water, washed free from acid and dried.
Patent GB-358211-A (GB)
IPC: B07B1/42
Filed: 1930-08-26
Abstract: 358,211. Sifting-apparatus; step-bystep conveyers. KRUPP GRUSONWERK AKT.-GES., F., Buckau, Magdeburg, Germany. Aug. 26, 1930, No. 25496. Convention date, June 19. [Class 117.] In screening and conveying apparatus of the type in which each of two sets of bars 7, 8, Fig. 1, are moved in opposite directions through the spaces between the bars of the other set, the sets of bars are, in the form shown, carried by two straight double-armed levers 3, 3<1> pivoted to a stationary frame 5 and driven by any means such as the crank and connecting-rod 9, 10, parallel guides, slides, &c. Preferably the drive shaft carries a flywheel to which it is resiliently connected, and buffer-springs may be interposed between the screen frames and the drive to absorb shocks. In the form shown in Fig. 4, the screen frames 13, 14 are supported on leaf springs 15, 15<1>, clamped midway to the stationary frame 16. A doublearmed lever 18 is driven by the crank and connecting-rod 19 and is connected at its ends by the springs 17 to the screen frames.
Patent GB-1263410-A (GB)
Title: Overhead projector
Inventor: RITZERFELD GERHARD
IPC: G03B21/132
Filed: 1970-05-27
Abstract: 1,263,410. Overhead projectors. G. RITZERFELD. May 27, 1970 [March 3, 1970], No.25537/70. Heading G2A. An overhead projector comprises a housing 1 upon which a transparent writing plate 4 and a Fresnel lens 20 are mounted, the housing containing a lamp box 3 supported on adjustable compression springs 13 such that the lamp box may be displaced vertically.
Patent GB-628697-A (GB)
Title: Improvements in and relating to a gas turbine plant
IPC: F02C3/36
Filed: 1947-09-19
Abstract: 628,697. Gas turbine plant. HANSEN, K. E. Sept. 19, 1947, No. 25604. [Class 110(iii)] In a gas turbine plant having one or two high-pressure stage turbines driving aircompressors and a low-pressure stage turbine providing useful power, the first or both high-pressure stage turbines are of the Francis type. The system may be open, closed or partly closed and includes an exhaust gas heat-exchanger. There may be re-heating between the turbine stages. The Francis type turbines have rotor blades 25 with which planes normal to the axis make radial sections and of which the screw surfaces increase in pitch towards the exhaust. A circular assembly of pivoted inlet guide blades 27 is provided. The turbine casing 26 is enclosed by an outer casing providing a jacket 30, 33 through which cooling air is passed. Cooling air also passes through the shafts 28 and the hollow interiors of the blades 27. Other air passes through the annular space 36 and shaft bore 37 to a space 38 and thence through hollow exhaust guide blades 39 to the space 33. All the cooling air is evacuated at 40.
Patent GB-481487-A (GB)
Title: Improvements relating to paper feed-rollers for typewriting machines
IPC: B41J13/048
Filed: 1937-09-22
Abstract: 481,487. Typewriters. FAIRWEATHER, D. K. (Underwood Elliott Fisher Co.) Sept. 22, 1937, No. 25670. [Class 100 (iv)] Sheet-feeding arrangements.-Feedrollers are pressed against the platen by means of one or more draw-springs which are connected at one end to a screw-threaded rod and are adjustable in tension by altering the points of connection or by rotating the rod. The feed-roller supports may cooperate with a spring which can be flexed manually to apply extra pressure when thick cards are fed. In the arrangement shown in Fig. 1, front and rear feedrollers 14, 15 are mounted in rocking arms, 23, 24 and 28, 29 supported by a shaft 47 which is mounted in brackets 49 on the carriage 40. The feed-rollers are pressed against the platen 10 by means of two springs 19, 20 arranged between rods 27, 37 trunnioned in the rocking arms. The springs engage grooves in the rod 37, and are provided with eyes 25 for engaging screw-threaded parts 30, 31 of the rod 27, the tension of each spring being adjustable by engaging the eye with one or other of the screw-threads and thereby altering the slant of the spring. The eyes can be manipulated by means ofpliers, or a hook inserted in a pole 26. The screw-threaded parts are formed of opposite hands so that the springs can be started in opposite directions to balance end-thrust. The springs can be adjusted simultaneously by turning the rod 27. A spring 36 for applying extra pressure to the feed-rollers when thick cards are fed abuts on the rod 37 and has a clip 36a engaging the rod 27. To apply extra pressure, the spring is flexed by depressing a handle' 44 on a shaft 41 provided with a finger 38 engaging the spring. The shaft 41 is mounted at the inner end in a yielding bracket 39 secured to the carriage, the arrangement preventing excessive flexing of the spring if the feedrollers are released when the spring has been already flexed by the finger 38.
Patent GB-198278-A (GB)
Title: Improvements in and relating to electric motor control
IPC: B60L15/12
Filed: 1922-09-22
Abstract: 198,278. British Thomson - Houston Co., Ltd., (General Electric Co.). Sept. 22, 1922. Automatic starting systems. - Relates to systems for starting electric motors by automatically cutting out resistances by means of electromagnetic switches or relays having two windings. According to the invention, which is an improvement upon the system described in Specification 175,815, one of the windings determines the order of operation of the relays, and the other imposes a time limit due to the temporary rise of current after each step. In the arrangement shown in Fig. 1 a potential transformer P.T. energizes one winding of each of two relays 20, 21, the other windings being connected across consecutive steps R<1>, R<2> of the starting resistance. The two relays thus determine the consecutive closure of two resistance contactors 16, 17 at intervals after the closure of an initial contactor 15, which is automatically controlled by either of a pair of doubly wound relays 18, 19 acting in conjunction with forward and reversing contactors 11, 12, 13, 14, in connection with a master controller C. The potential transformer may be replaced by a series transformer or by a transformer having its primary connected across a portion of the starting resistance.
Patent GB-676934-A (GB)
Title: Improvements in or relating to the recovery of diamonds from diamondiferous concentrate
IPC: B03D1/00
Filed: 1950-10-24
Abstract: Small diamonds, i.e. those passing an 8 mesh Tyler sieve, are recovered from diamondiferous concentrate by subjecting the concentrate to a cleaning operation to render the diamonds water-repellent and then to a flotation process.  The cleaning operation may be by attrition in a lightly loaded ball mill or by washing in hydrochloric acid which may be boiling.  The diamonds may be floated by gently dropping the cleaned concentrate on to a tranquil body of liquid and skimming off the diamonds or by spreading the concentrate thinly on a pan, adding a liquid to cover the concentrate and gently rocking the pan, the diamonds being lifted by the edge of the liquid.  With diamonds of -30 mesh the flotation may be repeated on concentrate and tailings after boiling with hydrochloric acid.  The concentrate may be obtained by known separation processes.
Patent GB-711913-A (GB)
Title: Method of firing ceramic transducers
IPC: C04B35/64
Filed: 1951-11-06
Abstract: A ceramic transducer material is fired to ceramic-curing temperature in a substance which is liquid at and above the temperature range in the firing cycle of said body at which dimensional changes occur in said body, cooling the body in the substance to a temperature below said temperature range and removing the body from the substance whilst the latter is still liquid.  The preferred material is barium titanate which may contain 2 to 10 per cent. of lead titanate. Specified substances which become liquid are tin and lead, and the chosen substance must not have a deleterious effect on the barium titanate if reaction occurs between them.  Specification 695,856 is referred to.
Patent GB-1031146-A (GB)
Title: Method of preparing sustained release pharmaceutical tablets
IPC: A61K9/24
Filed: 1964-06-23
Abstract: Sustained release pharmaceutical tablets are prepared by mixing a solid medicament with a sustained release material in a mixing vessel, heating the vessel until the temperature of the mixture is above the melting point of the sustained release material, coating the mixture until it forms agglomerates, milling the latter, and compressing the milled product into tablets.  The sustained release material is defined as being a lipid material, solid at room temperature, having a melting point of from 40 DEG  to 100 DEG C., substantially water-insoluble and resistant to disintegration, but slowly dispersible in the gastro-intestinal tract.  Suitable such lipids are hydrogenated castor oil, 12-hydroxy-stearyl alcohol, glyceryl mono- and di-stearate, micro-crystalline wax, and mineral or vegetable waxes, and higher fatty acids, higher fatty alcohols (i.e. 12 to 31 carbon atoms) and esters thereof.  Medicaments may be chlorpromazine, aminophylline, secobarbital, acetaminophen, acetylsalicylic acid, tetracycline, vitamins, sympathominetic amines, antihistamines, hematinics, anti-spasmodics, antacids and mono-amine oxidase inhibitors.  Other ingredients may be fillers and tabletting lubricants.  Examples are given for sustained release tablets containing acetaminophen and trans-2-phenylcyclopropylamine, and for a sustained release layered tablet which is a sustained release/immediate release combination containing acetaminophen.