baber/WOPTO huggingface dataset:
Patent GB-1116896-A (GB)
Title: Improvements in centrifugal separators
IPC: B04B7/08
Filed: 1966-08-05
Abstract: 1,116,896. Centrifugal separators. M. BARAM. 5 Aug., 1966 [14 Aug., 1965], No. 35091/66. Heading B2P. In a centrifuge, particularly for use in laboratories and comprising a lower part 2 and an upper part I divided by a sludge discharge slit 12 that can be opened and closed by a hydraulically-operated shut-off membrane 10 the lower part 2 consists of an outer vessel 3 fastened on to a drive shaft A and an inner detachable vessel 4, the vessels defining between them a space 5 into which fluid, e.g. water, is introduced via a pipe 6 and passages 61' and passes through borings 8 in a flange 9 of the vessel 3 into a space beneath the membrane 10 in order to expand the latter into sealing contact with the part 1 so as to close the slit 12. Openings 11 are provided in the flange 9 to allow some of the fluid to escape constantly. Liquid material to be centrifuged and clear liquid are respectively introduced into, and removed from, the vessel by means of pipes (not shown) extending through an opening 7 in the part 1. The part 1 may be made of transparent plastics. The membrane 10 which may be of rubber or plastics is held on to the flange 9 at its outer periphery by a ring 13 which is urged downwardly by distance screws 15 acting through the part 1 and through screws 16 which determine the width of slit 12, and at its inner periphery by the upper edge of the vessel 4 which is pressed down by the pipe 6 as the latter is screwed on to the shaft A. When sufficient sludge has been separated out in the vessel 4, the sun of the fluid to the space 5 is reduced or 'stopped so that the membrane 10 collapses and allows the centrifuged sludge to escape through the slit 12. For centrifuging very small quantities of material, the inner vessel 4 may have the shape of an almost horizontally-extending disc or ring.
Patent GB-1044199-A (GB)
Title: Improvements in or relating to root-mean-square voltage conversion circuits
Inventor: GUILDFORD LESLIE HENRY
IPC: G06G7/20
Filed: 1964-08-27
Abstract: 1,044,199. Semi-conductor circuits. MULLARD Ltd. May 10, 1965 [Aug. 27, 1964], No. 35123/64. Headnig H3T. [Also in Division C4] In a R.M.S. voltage conversion circuit a squaring circuit comprises two insulated gate field effect transistors which may be of the metal oxide silicon type connected in push pull with transformer input and output, and a square root circuit comprises a single such transistor with its drain and source shunt connected across the input to a differential transistorized amplifier from a current generating transistorized amplifier; the differential amplifier providing feedback to the gate of such transistor to equalise the drain to source voltage with a reference voltage; the gate to source voltage then being proportional to the square root of the input.
Patent GB-619915-A (GB)
Title: New pyrimidine derivatives
IPC: C07D239/42
Filed: 1946-11-27
Abstract: 5-Nitropyrimidines of the formula <FORM:0619915/IV(b)/1> where either B or D is the group -NH.CRR1. COOR11 (where R and R1 may be hydrogen, hydrocarbon, or substituted hydrocarbon, and one of them may be -COOR11; R11 is a hydrocarbon radical), and the other group may be hydrogen, halogen, amino or alkyl, and A may be any of these four groups or -NH.CRR1.COOR11, are prepared by condensing an a -aminoester, NH2.CRR1.COOR11 with a 5-nitropyrimidine of the formula <FORM:0619915/IV(b)/2> where either Y or Z is halogen, and the other group, and X, may be hydrogen, halogen, amino, or alkyl.  The condensation is carried out by mixing in a solvent, e.g. methanol. The aminoester is conveniently generated from its hydrochloride by the action of aqueous or alcoholic alkali immediately prior to the reaction; one or two molecules of the aminoester may be used. Preferred starting materials are 4-methyl-6-chloro-2-amino-5-nitropyrimidine, and ethyl a -aminopropionate, ethyl aminoisobutyrate, ethyl a -amino-b -ethoxypropionate and ethyl a -amino-b -phenylpropionate.  Products which contain one or two halogen atoms in positions 2, 4 or 6 are reacted with a primary or secondary amine to give the corresponding amino-derivative.  In addition, the substituted 5-nitropyrimidines are reduced, preferably with hydrogen and a Raney nickel catalyst, to give derivatives of 6-hydroxy-7 : 8-dihydropteridins.  In example 1, glycine methyl ester in methanol at 0 DEG  C. is added to 2 : 6-dichloro-5-nitropyrimidine to give 2-chloro-5-nitro - 6 - carbomethoxymethylaminopyrimidine which, with a solution of ammonia in methanol, gives 2-amino-5-nitro-6-carbonethoxymethylaminopyrimidine; reduction of the 2-chloro-5-nitro - 6 - carbomethoxymethylaminopyrimidine with hydrogen and Raney nickel gives 2-chloro-6-hydroxydihydropteridin. In example 2, glycine ethyl ester is added to 2 : 6-dichloro-5-nitro-4-methylpyrimidine to give 2-chloro-5-nitro - 4 - methyl - 6 - carboethoxymethylamino - pyrimidine which, with ammonia, gives the 2 - amino compound; 2 - chloro - 4 - methyl - 6 - hydroxydihydropteridin is obtained on reduction of the 2-chloro-5-nitro-4-methyl-6-carboethoxymethylaminopyrimidine.  In example 3, 2 - chloro - 5 - nitro - 4 - methyl - 6 - carbomethoxy - methylaminopyrimidine is prepared from the 2 : 6-dichloro compound and glycine methyl ester.  In a further seven examples, the pyrimidines already mentioned, and also 4 : 6-dichloro - 5 - nitro - 2 - methylpyrimidine are condensed with glycine esters or ethyl aminomalonate, the products reacted with ammonia, diethylamine or b -diethylaminoethylamine, and the corresponding dihydropteridins also prepared by reduction of the pyrimidines. 4-Methyl-6-chloro-2-amino-5-nitropyrimidine is prepared from 4-methyl-6-hydroxy-2-amino-5-nitropyrimidine by the action of phosphorus oxychloride.
Patent GB-797336-A (GB)
Title: Improvements relating to air-conditioning installations on motor vehicles
IPC: B60H1/00
Filed: 1956-11-16
Abstract: 797,336. Ventilating vehicles. DAIMLERBENZ AKT.-GES. Nov. 16, 1956 [Nov. 19, 1955], No. 35164/56. Class 137 In an air conditioning installation for a motor vehicle comprising independently adjustable 'heating and ventilating apparatus having ducts 3, 3 with ram air intakes 2, 2 at the respective sides of the vehicle, a snap-action flap, or disc, valve 23 is provided adjacent the intake 2 of each duct, the valves 23 being mounted on a  common shaft 24 for simultaneous operation from either one of two control devices 25, one of which is conveniently accessible to a driver and the other to a passenger by the driver's side. Each control 25 is one of a set of three, the other two consisting of a device 22 which controls the passage of 'hot, or cold, medium through a heat-exchanger indicated by cross hatching, and a device 21 which controls the ventilation by opening, or closing, a disc valve. Should the vehicle come close behind, e.g. a lorry emitting foul gases, operation of either device 25 quickly actuates the valves 25 to close the ducts 2, 2. The valves 23, which may oscillate about a vertical, or horizontal edge, instead of about a central, or diametral, pivot axis, may be replaced by a roller blind, a louvre, or a pivoted louvre. The quick action means for arresting air intake may comprise a small extractor fan 33 mounted in each duct. If fresh air suction fans are provided then they can be made to rotate in the reverse direction by means of a polarity-reversing switch arranged near the steering wheel and cooperating with a quick acting brake, which momentarily arrests the fan before its reversal. When the suction fans are used in conjunction with the valves 23 they are automatically switched off while the valves 23 are closed.
Patent GB-493531-A (GB)
Title: Process for the preparation of methyl alcohol from marble and the production of fuel therefrom
IPC: C07C31/04
Filed: 1936-12-23
Abstract: The following composition for a synthetic fuel is given: methyl alcohol 94,53, synthetic camphor 0,01, acetone 0,165, ethyl ether 1,0, terebenthine essence 0,01, benzene 4,285, and a few drops of mirbane essence.  The synthetic camphor is first dissolved in the methyl alcohol and the other ingredients are then added.ALSO:Methyl alcohol is obtained by reacting hydrogen at high temperature and pressure in presence of a catalyst containing iron, caustic potash and zinc oxide with carbon monoxide which has been prepared by reducing carbon dioxide with a mixture of wood charcoal and iron, the carbon dioxide being produced from powdered marble and dilute sulphuric acid.  The following composition of a synthetic fuel is given: methyl alcohol 94,53, synthetic camphor 0,01, acetone 0,165, ethyl ether 1,0, terebenthine essence 0,01, benzene 4,285 and a few drops of mirbane essence.  The synthetic camphor is first dissolved in the methyl alcohol, and p  the other ingredients are then added.
Patent GB-433172-A (GB)
Title: Improvements in or relating to lifting devices for vehicles
IPC: B60S9/04
Filed: 1934-12-07
Abstract: 433,172. Lifting-jacks; fluid-pressure linkage and load-handling machines. JACKSON, L. MELLERSH-, 28, Southampton Buildings, Chancery Lane, London.-(Marlowe Devices, Inc. ; 29, Ryerson Street, New York, U.S.A.) Dec. 7, 1934, No. 35271. [Class 78 (iii)] [See also Group XXXI] Two jacks, connected to the front and rear axles of a vehicle respectively, each comprising lazy-tongs operated by a horizontal fluid-pressure piston to force a foot against the ground, and each being connected by piping to a self-contained pressure-producing apparatus mounted on or near the dashboard, are fitted so that the vertical thrust passes from the lazy-tongs direct to the vehicle frame without subjecting the fluid-pressure cylinder and piston to any strain. Fig. 3 shows one of the jacks comprising a foot 85 secured to two parallel sets of lazy-tongs 81, 82 having springs 83 at the joints. One upper link of the series is pivoted to a fixed point at 79<1> while the other is adapted to be pushed laterally by a hollow piston 73, Figs. 3 and 6, carrying a roller 78 which transmits the upward thrust directly to the bracket 66 secured to the axle. A spring 76 retracts the hollow piston and collapses the lazy-tongs when the fluid pressure is relieved. The fluid-pressure unit comprises an electric motor 12, Fig. 8, which drives a cam shaft 17 through worm gearing. The cam 23 drives a hollow plunger and spring piston 32 so as to draw oil by suction from a reservoir through the valve 37 on one stroke and force it through the valve 38 to the jack cylinder on the return stroke. Fig. 11 shows the valve-operating means. A cam shaft 53 can be fixed angularly in any one of a number of set positions, so that one or other of the valves 45, 46 leading to the two jack cylinders can be held open, or alternatively the valve 60 may be opened to connect the jack cylinder to the high-pressure side of the pump, the latter then restoring the liquid to the reservoir.
Patent GB-656245-A (GB)
Title: Rotating transmitter for electro-mechanical power, in which the speed automatically varies as an inverse function of the variation of the resistance torque
IPC: H02K17/36
Filed: 1947-12-31
Abstract: 656,245. Transmitting mechanical power. ROSEAU, M. Dec. 31, 1947, No. 35326. Convention date, Sept. 10, 1946. [Class 38 (iv)] An electro-mechanical power transmitter in which the speed of the output shaft varies inversely as the load torque comprises two rotating field dynamo-electric machines, the induced member of the first of which is mechanically and electrically connected to the inducing member of the second, which is axially spaced from the first. The inducing and induced members of the second machine drive two elements of a planetary gear, or the like, the satelite carrier of which drives the output shaft. As shown in Fig. 1, the squirrel-cage rotor 2 of an induction motor having a stator 1 runs freely on a shaft 7 to which is keyed the inner rotor 5 of a second induction motor 4, 5, the member 4 of which is secured by brackets 3 to the rotor of the first machine. The squirrelcage winding of member 2 extends also to member 4 to provide excitation for rotor 5. The output shaft 16 is driven by the satellite carrier 15 of a planetary gear comprising pinion 16 keyed to shaft 7, toothed ring 12 rigid with motor member 4 and satellite wheels 13. In a modified arrangement acting solely as a speed controller, the first machine is formed as a salient pole alternator, the field of which is driven by a prime-mover and excited by D.C. The induced member of this machine excites and rotates bodily with the outer member 4 of the second machine. A number of planetary gears associated with electrically-actuated mechanical clutches may be provided to allow greater speed variation of the output shaft. Clutches may also be provided for automatically locking together the input and output shafts upon the load tending to drive the prime-mover.
Patent GB-302230-A (GB)
IPC: F16C9/02
Filed: 1928-12-01
Abstract: 302,230. Krupp Germaniawerft Akt.- Ges., F. Dec. 12, 1927, [Convention date]. Securing bearings on crank shafts.-A rolling friction bearing E capable of being threaded on to a multiple-throw crank shaft A is mounted on the latter by half rings b<1>, b<2>, the half ring b<1> being bolted by screws c<1> to the crank-web C and the half ring b<2> being secured by screws d<1> to a horse-shoe shaped member D. The latter is fixed to the crank-web C by screws d<2> and grooves and feathers d<3>. After removal of the screws c<1>, d<1>, and the ring parts b<1>, b<2>, the bearing can be threaded over the shaft.
Patent GB-395587-A (GB)
Title: Improvements in stop-cocks
IPC: F16K5/16
Filed: 1932-12-14
Abstract: 395,587. Plug cocks. DEHNE, K., 30, K÷nigsweg, Charlottenburg, Berlin. Dec. 14, 1932, No. 35472. [Class 135.] In a rotary plug cock wherein the plug is held seated by a spring &c. the plug f is operated by means of a ring b which loosely surrounds the plug and rests on the outside of the casing a, as shown, the said ring having cam surfaces c adapted to coact with corresponding cam surfaces e formed on the plug. To open the cock the ring b is turned by an integral handle or a handle fitted to the strap d, the plug remaining in its closed position until the cam surfaces coact so as to lift the plug in its seating, whereupon the plug turns with the ring towards its open position.
Patent GB-508023-A (GB)
Title: Massaging and cleansing device
IPC: A61H7/00
Filed: 1937-12-23
Abstract: 508,023. Pads. BOOHARIN, L. Y. Dec. 23, 1937, No. 35601. Convention date, Dec. 23, 1936. [Class 19] [Also in Group VI] A massaging and cleansing device comprises a strip of soft elastic rubber 6 provided with grasping means 2 at either end, and a facing of sponge rubber having a multiplicity of contacting surfaces. The contacting surfaces may comprise transverse strips of sponge rubber alternating with rows of formations of soft rubber. These formations may be in the form of comb-like projections 4, hemispherical bodies 7 or strips of tubular form. The opposite surface may have a strip of sponge rubber 5 which may be thickened opposite the rows of formations. Alternatively, the device may have identical contacting surfaces on both sides, either strips of plain sponge rubber or rows of formations, Fig. 8. The device is drawn across the flesh with an intermittent stretching motion ; the sponge rubber cleans-. ing the skin the rubber projections massaging the flesh ; and the stretching action exercising the muscles. The Specification as open to inspection under Sect. 91 comprises also a modification which is not restricted to the use of rubber for the strip 6 while the facing may be of any water-retaining material. This subject-matter does not appear in the Specification as accepted.
Patent GB-1199003-A (GB)
Title: Process for the preparation of Substituted Naphthoylene-Benzimidazolium Salts, New Salts so obtained and their use in Dyeing
Inventor: SUREAU ROBERT FREDERIC MICHEL
IPC: C09B57/12
Filed: 1967-08-03
Abstract: 1,199,003. Nitro compounds. UGINE KUHLMANN. 3 Aug., 1967 [4 Aug., 1966], No. 35724/67. Addition to 1,073,327. Heading C2C. [Also in Division C4] 2 - Nitro - 5 - methoxy - phenylnaphthoylimide is produced by treating 2-nitro-5-chloroaniline with methanol in the presence of caustic potash to give 2-nitro-5-methoxyaniline, and reacting the product with naphthalic anhydride.
Patent GB-168554-A (GB)
Title: Improved means for and method of hanging curtains and the like in pairs
IPC: A47H5/04
Filed: 1920-12-20
Abstract: 168,554. Borton, A. F. Dec. 20, 1920. Curtains, drawing and suspending. - A device for supporting the edge of a curtain, attached to the rings &c. mounted on poles &c., is extended when the rings &c. are separated, and carries the curtain edge further from the rings &c., thus closing the opening between two adjacent curtains. The curtain edge is attached to the end 8 of a lazy-tongs device connected to the curtain rings b, c by means of collars 6.
Patent GB-496010-A (GB)
Title: Improvements in reflecting screens for use in viewers for coloured photographic films
IPC: G02B27/02
Filed: 1937-12-29
Abstract: 496,010. Viewing-apparatus. BUCKINGHAM, J. F. Dec. 29, 1937, No. 35957. [Class 97 (i)] Means for viewing a coloured film or like transparency by artificial light include a reflector with a light-diffusing surface over it, and tinting means incorporated in the reflector, or in the light-diffusing surface, or between the two. This composite screen is suitable for use with a non-daylight type of electric lamp and may be embodied in the viewing- apparatus disclosed in Specification 495,984. In one construction a mirror has over it a glass plate of which the outer surface is frosted to diffuse the light. Between the mirror and the glass plate is a blue-tinted film of gelatine. Alternatively to the gelatine film, the mirror may be tinted or the light-diffusing medium may be tinted fabric.
Patent GB-798149-A (GB)
Title: Electronic grounding apparatus
Inventor: MESH THEODORE JULIUS
IPC: H05F3/02
Filed: 1956-11-26
Abstract: 798,149. Discharging static electricity; transformers. GILBERT & BARKER MANUFACTURING CO. Nov. 26, 1956, No. 36051/56. Classes 35 and 38 (2). [Also in Group XXXVI] Apparatus for earthing a petrol lorry and providing an indication when a correct earthing connection has been made comprises a bridge circuit energized by a valve oscillator, a lead from the bridge being used to make the earth connection and unbalancing the bridge when a correct connection has been made. The bridge is connected to the oscillator and to an amplifier circuit controlling relays which operate suitable indicating lamps through transformers, the windings of which, 50, 52 and 35, 39, 45, are mounted as shown on dust cores 51 and 48 projecting through an insulating panel 94, the windings 45 and 50 being mounted on one side of the panel and the remaining windings on the other side of the panel. The dust cores 48 and 51 are earthed.
Patent GB-1124248-A (GB)
Title: Novel benzdiaz [1,4] epine derivatives and processes for the preparation thereof
IPC: C09K5/08
Filed: 1965-12-01
Abstract: Compounds of the general formula <FORM:1124248/C2/1> (wherein R1 represents a halogen atom or a trifluoromethyl, nitro, cyano, C1- 7 alkyl, C1- 7 alkoxy or C1- 7 alkylthio group, R2 represents a halogen atom, R3 represents a C1- 7 alkyl or halo-(C1- 7 alkyl) group, R4 represents a C1- 6 alkyl group and the broken lines denote optional substituents) and their acid addition salts are prepared by (a) isomerizing a compound of the formula <FORM:1124248/C2/2> by the application of heat (if desired, the isomerisation being carried out without isolating the starting material from the medium in which it is obtained), or (b) reacting a compound of the formula <FORM:1124248/C2/3> (wherein X represents a halogen atom) under anhydrous conditions with not substantially more than 1 mol. of a non-nucleophilic strong base for each mol. of the quinazoline derivative at a temperature of from 40 DEG  to 80 DEG  C., optionally followed in each case by salt formation. The haloalkyl groups contain one or more halogen atoms.
Patent GB-1033467-A (GB)
Title: Improvements in or relating to vacuum cleaners
IPC: A47L9/02
Filed: 1964-09-04
Abstract: 1,033,467. Suction cleaner tools. ELECTROLUX Ltd. Sept. 4, 1964 [Sept. 16, 1963], No. 36282/64. Heading A4F. A suction cleaner tool, which may be used either as a dusting brush or as a suction nozzle for cleaning upholstery without disturbring its connection with a suction hose, comprises an annualr dusting brush 36 slidable relatively to the tool body 22, by laterally projecting manipulating buttons 40, between an outer operative position and an inner position wholly within the double wall 24, 26 of the body  22. When the brush 36 is retracted channelled wing members 50 are swung about pivots 52 from positions alongside the body 22 to extend laterally to form the suction nozzle for cleaning upholstery. The body 22 is attached to a suction conduit 12 to which may be telescopically connected a wand 16 carrying a suction nozzle for cleaning floors, &c.
Patent GB-522736-A (GB)
Title: Improvements in or relating to weighing mechanism
IPC: B07C5/30
Filed: 1938-12-14
Abstract: 522,736. Weighing-apparatus. BEST, C., and MOLINS MACHINE CO., Ltd. Dec. 14, 1938, No. 36452. [Class 143] A weighing-apparatus of the kind wherein the scale-beam indicator after swinging over a series of registering members (against one of which it is subsequently pressed to cause the operation of a corresponding counting or sorting device) is accurately positioned in relation to the registering members by the advance of a knife-edged selector characterized by the incorporation in the registering members of trip elements which on release by the indicator permit the counting or sorting devices to be actuated by means other than the scale beam or selector. As shown for weighing a succession of cigarettes fed individually to a scale pan, constructed and supplied as described in Specification 425,700, the scale beam (not shown) carries an indicator 10 bearing a needle 13 arranged to be engaged by a knifeedged selector 14, 30 when this is rocked about a pivot 41 as described in Specification 425,721. The operation is as follows. When a cigarette has entered the scale pan, the cam mechanism advances the selector 14, 30 sufficiently to remove a centralizing member 48 from holding engagement with the indicator 10 and thereafter allows a fixed interval of time to elapse for the beam to swing, preferably about half an oscillation. The cam mechanism then completes the swing of the selector to engage the needle 13 and thus set the indicator to a definite position opposite one of a number of registering devices 25. The continued movement of the selector presses back the indicator to displace the selected registering device 25 and thereby trip corresponding mechanism 29, 22 which then operates the corresponding counter 16 under the action of a spring 23. The trip mechanism is restored by a cam operated bar 27. Prior to the centralizing action of the member 48, a stretched wire 148 makes contact with the indicator 10 to reduce shock and vibration. The total number of weighings is registered on a counter operated from a bar 31 which is pressed back each time the indicator 10 is pressed back. Sorting by weighing.-The bell-crank levers 22 may be coupled mechanically or electrically to movable guide flaps or shoots which guide the cigarettes into separate compartments after discharge from the scale pan. Specifications 442,556 and 498,337 also are referred to.