baber/WOPTO huggingface dataset:
Patent GB-534226-A (GB)
Title: Manufacture and use of azo dyes
IPC: C09B29/08
Filed: 1939-08-26
Abstract: 534,226. Dyes and dyeing. OLPIN, H. C. Aug. 26, 1939, No. 24589. [Classes 2 (ii), 2 (iii) and 15 (ii)] Monoazo dyes are obtained by coupling a diazotized amine R 1 -NH 2  with a phenolic compound H-R 2 -OH, R 1  and R 2  representing aryl residues, free from nitro or sulphonic acid groups, wherein the residue R, contains, as the sole carbon ring or rings, either a single benzene ring or a single diphenyl nucleus and the residue R 2  contains, as the sole carbon ring or rings, either a single benzene ring or a single diphenyl or cyclohexylbenzene nucleus, one or both of the residues R, and R 2  contains two carbon rings and one or both carries, as substituent, an acidylamino group. The residues R 1 , R 2  may carry also other substituents, e.g. halogen, alkyl, hydroxyalkyl, alkoxy, hydroxyalkoxy, alkylsulphone or cyano. Alternatively, the same dyes are obtained by acidylating a primary or secondary nuclear amino group in a corresponding parent dyestuff. The products are suitable for incorporation in cellulose ester or ether lacquers and for colouring cellulose ester or ether fibres, films &c. by application thereto in substance, by formation on such materials from their components or by incorporation in the solutions from which the materials are shaped. Specified acidyl groups are acetyl and propionyl, specified diazo components are aniline, toluidines, chloranilines, m- and p-aminoacetanilides, monoacetylbenzidine, monoacetyltolidine and o- and p-aminodiphenyls and specified coupling components are phenol, cresols, m- and p-acetylaminophenols, o- and p-hydroxydiphenols, 41-acetylamino-4-hydroxydiphenyl and p-cyclohexylphenol. Examples (1) to (3) relate to the production in substance, by diazotization and coupling, of the dyestuffs, (1) p-aminoacetanilide # p-hydroxydiphenyl or p-cyclohexylphenol, (2) p-aminoacetanilide # o-hydroxydiphenyl, (3) p-aminodiphenyl - p-acetylaminophenol. Example (4). relates to the acetylation with acetic anhydride in glacial acetic acid at 50‹C. of the product obtained by reducing the nitro group in the dyestuff, p-nitroaniline - p-hydroxydiphenyl. Example (5) relates to the application to a cellulose acetate knitted or woven fabric of an aqueous turkey red oil and soap dispersion of the acetylated product of (4) to obtain a fast full bright yellow dyeing, readily dischargeable with sodium or zinc formaldehydesulphoxylate.
Patent GB-302637-A (GB)
Title: Straining devices for tightening up wire mattresses, and for other purposes
IPC: A47C23/28
Filed: 1927-09-19
Abstract: 302,637. Walker, A. E., and Holme, E. H. Sept. 19, 1927. Mattresses.-A screw-threaded cylindrical sleeve d for engagement with a screw a for mattresstensioning is made from a sheet metal blank which is first pressed, as between dies, to produce a flange h and a series of transverse grooves or corrugations g, and then fashioned into a cylindrical shape, as by a mandrel, a jointless ring j preventing opening at the joint. Projections on one edge of the blank engage the rail e of the mattress to prevent rotation of the sleeve therein and a washer k, suitably apertured to slide over the projections, is placed between the flange h and the rail. Specification 281,834 is referred to.
Patent GB-259946-A (GB)
Title: Process and apparatus for recording sound
IPC: G11B3/00
Filed: 1926-10-05
Abstract: 259,946. K³chenmeister, H. J. Oct. 13, 1925, [Convention date]. Producing or simulating echo, in recording; horns, multiple arrangements of.-A method of recording sound consists in providing means whereby the sound waves to be recorded act upon one and the same recording instrument two or more times in succession, with a time interval of at least 1/30 of a second between successive excitations of the recorder. This effect may be produced, as shown in Fig. 1, by using two horns c, d connected to the same recording sound-box b, one horn having a long tubular portion e. Sound from the source i enters the mouths of the horns together, and the great difference in the paths through the horns produces the required interval between successive actuations of the diaphragm, which interval may be as much as 1/8 of a second. Fig. 2 shows a modified arrangement, in which sound from the source i passes directly into a horn g, and into a horn f by reflection from a surface h. A further alternative, Fig. 3, consists in using in the recording sound-box b a diaphragm which is actuated electromagnetically by coils in circuit with a microphone b<1> placed near the source of sound i, and, after the required interval, by the direct action of the same sound waves, entering a horn k.
Patent GB-249784-A (GB)
Abstract: 249,784. Clark, H. D. Dec. 18, 1925. Tabular calculators for converting decimal fractions of an acre into roods and poles and into yards, or vice versa. A disc a bears on one side circularly arranged numbers representing decimals of an acre and on the other side in corresponding positions the equivalent numbers of square yards. The radial cursor b embraces the disc and is divided into roods corresponding with the circles of numbers on the faces of the disc, and co-operates also with a circular scale of poles.
Patent GB-717644-A (GB)
Title: Iron catalyst for the hydrogenation of carbon monoxide giving a high yield of gasoline-like hydrocarbons
IPC: C07C1/04
Filed: 1952-10-06
Abstract: The hydrogenation of carbon monoxide to products having a high content of hydrocarbons in the gasoline range is effected by means of an unsupported iron catalyst prepared by precipitating an iron salt with alkali metal hydroxide or carbonate at a pH of 7-9 and reducing less than 50 per cent of the iron to metal, the catalyst containing 0.5-2 per cent (as K2O) of alkali metal and 0.5-5 per cent of SiO2, with or without small quantities of activating metal compounds.  The synthesis may be effected at 25 atmospheres and 230 DEG  C. with a space velocity of 500 per hour and a recycle ratio of 1 : 3.ALSO:A catalyst for the synthesis of hydrocarbons having a high content in the gasoline range is obtained by precipitating iron oxide, hydroxide, or carbonate from a solution of an iron salt at a pH of 7-9, and reducing to convert less than 50 per cent., preferably 20-30 per cent. of the iron to metal.  The precipitate is treated with an alkali metal silicate and washing is controlled to give an alkali-metal content of 0.5-2 per cent. calculated as K2O and a SiO2 content of 0.5-5 per cent., both based on the total iron content of the catalyst.  Activators consisting of lime, copper, silver, and metals of groups 5, 6, and 7 may be present.  The catalyst has an internal surface area of 130-150 sq. m. per gram of total iron.
Patent GB-707255-A (GB)
Title: Improvements in internal combustion drills
Inventor: WARSOP NORRIS WILLIAM
IPC: E21B1/34
Filed: 1951-10-25
Abstract: 707,255. Percussive tools. WARSOP POWER TOOLS, Ltd. Oct. 24, 1952 [Oct. 25, 1951], No. 25001/51. Class 124 A percussive tool with an internal combustion power unit comprising a single cylinder with a free cylinder head acting as a hammer piston and having a flange of larger diameter operating in an enlarged extension of the engine cylinder, is provided with non- return valves arranged in such a manner that air is admitted to the space above the ham. mer piston and air and exhaust gas are delivered to a space in the front end of the tool and then through a hollow steel. As shown, Fig. 2, during the upward stroke of the hammer piston 14, when exhaust gas is forced through a passage 26 into a space below the flange 14, air is driven out of the space above the flange by way of port 44, non-return valve 54, and pipe 50 to a space 52 from which it flows through a hollow steel 30. On the downward stroke, Fig. 3, exhaust gas is expelled from the lower space through port 46, valve 48, and pipe 50 and air is drawn into the upper space through port 44 and valve 42. The valves may be arranged in a chamber 56 attached to the side of the machine. This arrangement of valves is stated to give a steady stream of clearing gases through the steel.
Patent GB-451896-A (GB)
Title: Improvements in or relating to corsets and swimming costumes
IPC: A41D7/00
Filed: 1935-09-09
Abstract: 451,896. Wearing-apparel. BONDO, A., 8a, Thurloe Place, South Kensington, London. Sept. 9, 1935, No. 25029. Convention date, April 12. [Class 141] A corset or swimming costume of elastic tricot is knitted in two one-piece front and rear panels, as shown, or in one piece, and the lower part A underneath the breast part B is knitted with an insertion of horizontally arranged rubber threads. The breast part B may be formed with pleats o.
Patent GB-783164-A (GB)
Title: Improvements in or relating to electron discharge devices employing photo-conductivetarget electrodes
Inventor: ZYNSKI HANS GERHARD LUBS
IPC: H01J9/20
Filed: 1953-02-19
Abstract: 783,164. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Feb. 3, 1954 [Feb. 19, 1953], No. 25046/56. Divided out of 783,162. Class 39(1). In the manufacture of a tube containing a photo - conductive target 7 and a cathode 2 liable to be damagec by such material, the cathode is providec with a protective medium and is exposed by heating only after the target has been formed. The cathode material before heating may be the usual mixture of barium and strontium carbonates and the heating then also serves to form and activate the oxide layer. The protective medium may then be the usual binder, e.g., collodion and extra coatings of collodion may be provided over the cathode surface. The photoconductive material may be selenium or selenium and tellurium and during its evaporation the target is maintained at -10‹C. to 95‹C. while the rest of the envelope is at 150‹C. to 300‹C. Additionally a movable flap 9 may be interposed between the cathode and the target during the deposition process.
Patent GB-406751-A (GB)
Title: Method of tinning utensils
IPC: C23C2/08
Filed: 1932-09-08
Abstract: In the manufacture of utensils such as spoons, knives, and forks the blanks are degreased by means of sawdust or the like, cleaned in an acid bath, washed in water, coarse tinned by dipping in a tinning bath containing fat, and then fine tinned in a bath without fat.  The degreasing is preferably effected in a revolving drum containing sawdust.  The coarse tinning bath comprises tin and a mixture of animal fat and tallow fat.  The articles after removal from the coarse tinning bath are subjected to violent vibration to remove excess tin and they may be coated with fat, e.g., by brushing with a sheeps wool brush containing tallow fat, before dipping in the fine tinning bath.  After fine tinning the articles are brushed with a sheeps wool brush containing fat and may then be cooled in running water and coated with nickel by electrodeposition.
Patent GB-367761-A (GB)
Title: Electric heater
IPC: H05B3/00
Filed: 1930-08-22
Abstract: 367,761. Liquid resistances. FUCHS, C., 12, Schifflõnde, Zurich, Switzerland. Aug. 22, 1930, No. 25131. Convention date, Sept. 4, 1929. Void [Published under Sect. 91 of the Acts]. [Class 37.] An electric heater, particularly adapted for heating liquids, comprises two electrodes 5, 6 separated by ar absorbent compound 8, such as gypsum, clay, or asbestos, in which an elec trolyte, such as glycerine or water, is absorbed Fig. 1 shows an immersior heater in which the elec trodes are oppositely directed helices 5, 6 on ar insulating core 4, the upper ends of the helices being unconnected. Alter natively, the helices may be concentric and separated by a cylinder of asbestos, and an insulating tube may pass through the heater for the passage of liquid to be heated. In a further modification, Fig. 3, the electrode 6 is formed by a bored conducting tube 13 arranged centrally so that the liquid to be heated passes through bores 16 into the absorbent mass 8 at the lower, or upper, end of the tube and back into the tube at the opposite end. In this case the electrolyte is formed by the liquid to be heated. Alternatively, in the modification in Fig. 3, the tube 1 may be conductive and replace the electrode 5. In a further modification, Fig. 5, plate electrodes 18, 19 are separated by an absorbent pad 8 soaked with the electrolyte and further absorbent slabs 20 separate the electrodes from the casing 21. The electrodes 18, 19 may also be formed of metal strainers, perforated plates, or spirally coiled wire.
Patent GB-1260902-A (GB)
Title: Electrical connectors
IPC: H01R9/03
Filed: 1969-05-16
Abstract: 1,260,902. Electric couplings. TELEFONAKTIEBOLAGET L.M. ERICSSON. 16 May, 1969 [17 May, 1968], No. 25217/69. Heading H2E. Branch cables 5, 6, 7, 8 supported in grooves in members 9, 11 are connected to cables 1, 2, 3, 4 in grooves in a member 10 by clamping the members with interposed members 12, 13 carrying printed contacts 14 and sealing ribs 15. (For Figure see next column.)
Patent GB-1045248-A (GB)
Title: Improvements in stands for electric light fittings and the like
IPC: F21V21/26
Filed: 1964-06-18
Abstract: 1,045,248. Stands. N. RDEE. June 18, 1964 [June 24, 1963], No. 25319/64. Heading A4H. A lamp stand has arm sections each comprising a square-section tube 1 having at its ends joint members 5 180 degrees out of alignment and in the tube a spring 3 housing a square-section inner tube 2 of smaller cross-section, two or three turns of the spring of smaller cross-section gripping the tube. Each member 5 has a guide sleeve 6 with a square-section inner bore engaging tube 2 and a bevel-gear 6<SP>1</SP> in engagement with a double bevel pinion 7 clamped between the joint members by a pin 8 so that when an angular adjustment of an arm section is made tube 2 is rotated thus tensioning the spring 3, the friction between the abutting surfaces of members 5 and pinion 7 preventing return of the arm section.
Patent GB-997004-A (GB)
Title: Thermally insulated enclosure
IPC: E04C2/20
Filed: 1962-07-04
Abstract: 997,004. Laminates. DOW CHEMICAL CO. July 4, 1962 [July 12, 1961 (2)], No. 25610/62. Heading B5N. [Also in Divisions F4] A thermally-insulated enclosure is formed of panels of foamed plastic material having grooved edges, the panels being joined in edgeto-edge relationship by plastic splines disposed in abutting grooves. The panels may consist of foamed polystyrene, polyvinyl chloride or phenol formaldehyde and may be faced with plywood, wood veneer, fibre glass, epoxy resin compositions or metal. The splines are composed of expanded polystyrene, polyethylene or polyurethane and are preferably wrapped in a polyethylene film.
Patent GB-751697-A (GB)
Title: Method of and apparatus for feeding or transferring pulverulent material
IPC: B01J8/00
Filed: 1954-09-03
Abstract: 751,697. Pneumatic conveyers. KONINKLIJKE ZWAVELZUURFABRIEKEN VOORHEEN KETJEN N.V. Sept. 3, 1954 [Nov. 20, 1953], No. 25674/54. Class 78 (1). In apparatus for feeding pulverulent material 2, e.g. a catalyst, from a container 1 through pipes 11, 12 to a chamber, e.g. a reaction chamber, of the kind in which the material is fluidised in a chamber 3 by admitting gas to it through a porous plate 5, a fluidised column 16 of material is maintained in the centre of the container, if necessary by supplying additional air through the pipe 15. The pressure in the chamber 3 is controlled by adjusting the pressure at the top of the container by a valve 8 and the discharge from the chamber is controlled by the difference in pressure between the chamber and the pipe 12. Specification 478,749 is referred to.
Patent GB-368243-A (GB)
Title: Gun breech
IPC: F41A3/08
Filed: 1930-08-28
Abstract: 368,243. Ordnance. HASEK, J., 37N, Jungmannova, Prague. Aug. 28, 1930, No. 25752. Convention date, Aug. 28, 1929. Void [Published under Sect. 91 of the Acts]. [Class 92 (ii).] Breech mechanism.-The breech screw 3 is housed in a block 1 which moves transversely in the gun breech after the manner of a wedge breech block. The operating bell-crank lever 6, Fig. 2, first acts to rotate the screw in the block for unlocking and then slides the block laterally to open the breech. In the form shown in Fig. 3, a lever 9 fast with the block moves to the position 9<1> for unlocking and then to the position 9<11> for moving the block laterally a pin on the block moving in a cycloidal groove 11. The Specification states that the firing pin may be cocked during the locking movement and the cartridge case extracted during unlocking.
Patent GB-1151643-A (GB)
Title: Method Of Making Schottky-Barrier Diodes
IPC: H01L21/00
Filed: 1967-06-05
Abstract: 1,151,643. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORP. 5 June, 1967 [15 July, 1966], No. 25835/67. Heading H1K. [Also in Division C7] A Schottby-barrier diode is formed by sputtering a layer 7 of metal on to a semi-conductor body 3 which is itself biased during the sputtering process so that contaminants may be sputtered off from the surface while the metal layer 7 is applied. Suitable semi-conductor materials include Si, Ge or GaAs, while the layer 7 may be of a high work-function metal such as W, Cr or Mo for N-type material, or a low work-function metal such as Al, In, Sn, or Zn for P-type material. The preferred form comprises an N-type layer 5 epitaxially deposited on a high conductivity (e.g. degenerate) substrate 3, the metal layer 7 being sputtered on to the epitaxial layer 5. Suitable sputtering apparatus is described, in which the sputtering gas used is argon. The semi-conductor substrate is initially etched clean, and may also be heated during the sputtering process. The metal layer 7 may form a compound, e.g. a metal-silicide; with the semi-conductor surface, thus producing a good mechanical bond.
Patent GB-868459-A (GB)
Title: Improvements in or relating to the preparation of thiocarbonyl fluoride
IPC: C01B17/45
Filed: 1959-07-28
Abstract: CSF2 is prepared by heating a mixture of CF2HCl, CF2HBr, CF2Cl2 or CF2Br2 with H2S or S at 500-900 DEG C., the molar ratios of the halomethane to the S compound being 2:1 to 1:4.  The halomethane may be mixed with H2S, or passed through molten S, and the resulting vapour mixture passed into a platinum-lined, or alumina reaction tube.  The tube may be in two electric furnaces at different temperatures in the above range so that the first part of the tube is 50 DEG C. below the later part.  The product vapours are cooled and HCl separated by counter-current scrubbing with a -pinene.  The residual gases are condensed by solid CO2 and CSF2 separated by distillation.  Alternatively, HCl may be separated by distillation at superatmospheric pressure.  The CSF2 spontaneously polymerizes to liquid and solid polymers on standing.  The solid polymers contain recurring (-SCF2-) units, and the liquid polymers consist of a dimer CF3SCSF, trimer (CF3S)2C = S and higher homologues.
Patent GB-621476-A (GB)
Title: Stabilised spark gap system suitable for high frequency current generators
IPC: H01T4/16
Filed: 1945-10-04
Abstract: 621,476. Spark-gaps. MARCONI'S WIRELESS TELEGRAPH CO., Ltd.; and LAY, A. W. Oct. 4, 1945, No. 25891. [Class 39 (i)] An electrical spark-gap, particularly for use with high-frequency current generators for electro-therapy, consists of a pair of short electrodes of refractory metal mounted on the ends of comparatively short stems of metal of high thermal conductivity supported at their remote ends, the electrodes being spaced apart at a distance which permits operation at a low potential (approximately from 600 volts to 1000 volts), the shortness of the stems being such that such thermal expansion as occurs has a negligible effect on the constancy of the spacing. The length of the stems is preferably of the order of 0.75 inch, and the nominal spacing of the electrodes is preferably set at 0.003 inch. As shown for a double-gap structure, pairs of tungsten electrodes e are mounted on the ends of copper bolts c which have shanks c<1> threaded through cooling plates p and copper bars b. The bolts, cooling plates and bars are clamped together by brass nuts n and brass washers w. The bars b are spaced apart insulatively on threaded brass studs s. The arrangement is applicable to a single-gap structure.
Patent GB-1515722-A (GB)
Title: Induction heating apparatus and method of controlling sam
IPC: H02M7/515
Filed: 1975-06-18
Abstract: 1515722 Controlling inverters: induction heating apparatus MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 18 June 1975 [18 June 1974 19 June 1974 10 July 1974] 25917/75 Headings H2F and H2H In an induction heating apparatus in which repetitive operation of a thyristor 22 provides ultrasonic current in an induction heating coil 21, the effective turn-off time of thyristor 22 is reduced and false operation due to dv/dt is minimized by supplying a negative bias to the gate of thyristor 22 only between the end of its conducting period and the time of the next gating pulse. The circuit is preferably supplied from the output of an unsmoothed full-wave rectifier 13 and has a zero volt switching circuit 24 arranged to ensure that the gating pulses initially start at or about zero voltage between lines 14 and 15. As described, the thyristor 22 is turned on by each ultrasonic frequency pulse from 25 and turned off after each half cycle by communicating circuit 18, 19. A monostable multivibrator 26 is triggered by each pulse from oscillator 25 and inhibits gate 27 for a period equal to the expected conducting period of thyristor 22 and allows a negative bias from source 28 to appear at other times. In Fig. 3 (not shown) the oscillator 25 generates pulses the duration of which is equal to the expected conducting period of thyristor 22, which pulses inhibit gate 27, while a monostable multivibrator provides pulses of short duration to trigger the thyristor 22. In Fig. 5 (not shown) the negative bias is provided by charging a capacitor during the conducting period via a first transistor and discharging it negatively via a second transistor into the gate of thyristor 22 during the non-conductive period. In Fig. 7 (not shown) a resistor is included in the cathode circuit of thyristor 22, the voltage across which triggers a monostable multivibrator which controls the gate 27. In Fig. 8 (not shown) a current transformer is included in the cathode circuit of thyristor 22 which triggers the monostable multivibrator 26 at the end of each conductive period.