baber/WOPTO huggingface dataset:
Patent GB-485500-A (GB)
Title: Improvements in or relating to vacuum vessels
IPC: A47J41/02
Filed: 1937-03-02
Abstract: 485,500. Metal - vapour converters. GENERAL ELECTRIC CO., Ltd., and GALLIZIA, E. March 2, 1937, No. 6211. [Class 39 (i)] [Also in Group XXVIII] A vapour electric converter with metal walls is made vacuum-tight by forcing a liquid such as oil or a solid such as bitumen into the pores of the walls. The vessel may be previously exhausted and placed in vacuo, and afterwards heated during the pore-sealing process : the sealing substance may be heated.
Patent GB-642198-A (GB)
Title: Improvements in ditching and tile laying machines
IPC: E02F5/10
Filed: 1948-02-28
Abstract: 642,198. Laying pipes. PARSONS CO. Feb. 28, 1948, No. 6216. Convention date, Nov. 13, 1946. '[Class 99(ii)] A tile-laying attachment mounted on the rear .end of a trench digging machine A comprises a supporting member 5 carrying a shoot down which tiles 16 gravitate, the lower end of the chute entering the trench and having stops 13 for detaining the tiles the lowermost of which may be manually lifted off the shoot and deposited on the trench bottom. The machine may have a shoe 15 to form a longitudinal groove 17 centrally of the trench bottom by which the tiles are centred, and scrapers 18, mounted on arms 19 pivoted on member 5 and normally pressed outwardly 'by springs 21, which loosen dirt from the trench walls 26 to fall at opposite sides of the tiles laid.
Patent GB-1100753-A (GB)
Title: Improvements in polyesterification catalysts
Inventor: SCHNEGG ROBERT
IPC: C08G63/82
Filed: 1965-02-12
Abstract: In the manufacture of polyesters by polycondensing a glycol ester of a dicarboxylic acid, there is used as a polycondensation catalyst a mixture of germanium dioxide and antimony triphenyl. The glycol esters may be made by a re-esterification process using as a catalyst lithium hydride, lithium metaborate, lithium acetate or calcium acetate.  The residues of p-(b -hydroxyethoxy)-benzoic acid may also be incorporated into the polyester.  Thus the methyl ester of p-(b -hydroxyethoxy)-benzoic may be added to the glycol ester before polycondensation or alternatively the methyl or a glycol ester of p-(b -hydroxyethoxy)-benzoic acid may first be polycondensed (alone or in admixture with an alkyl or glycol ester of an aliphatic or aromatic dicarboxylic acid) to produce a pre-condensate of molecular weight at most 3000 and the product then polycondensed with an alkyl or glycol ester of a dicarboxylic acid. Examples describe the manufacture of homopolyesters, copolyesters or block copolyesters containing the residues of (a) ethylene glycol and terephthalic acid; (b) ethylene glycol and 1:2 - bis - (4 - carboxyphenoxy) - ethane; (c) neopentyl glycol and 1:2-bis-(4-carboxyphenoxy)-ethane; (d) ethylene glycol and 4,41-bis-(4-carboxyphenoxy)-dibutyl ether; (e) ethylene glycol, 1:2-bis-(4-carboxyphenoxy)-ethane and p-(b -hydroxyethoxy) benzoic acid; (f) ethylene glycol, 1:2-bis-(4-carboxyphenoxy)-ethane, terephthalic acid and p-(b -hydroxyethoxy)-benzoic acid; (g) ethylene glycol, 1:2-bis - (4-carboxyphenoxy) - ethane and bis - (4-carboxyphenoxy)-methane; (h) ethylene glycol, 1:4 - bis - (4 - carboxyphenoxy) - butane, terephthalic acid and p-(b -hydroxyethoxy)-benzoic acid: (i) 1:4-cyclohexanedimethanol, ethylene glycol, 1:2-bis-(4-carboxyphenoxy) ethane and p - (b  - hydroxyethoxy) - benzoic acid; (j) ethylene glycol, 1:4-cyclohexanedimethanol, 1:2 - bis - (4 - carboxyphenoxy) - ethane, terephthalic acid and p-(b -hydroxyethoxy) benzoic acid; (k) ethylene glycol, bis-(4-carboxyphenoxy)-p-xylylene, terephthalic acid and p-(b -hydroxyethoxy)-benzoic acid.
Patent GB-384860-A (GB)
Title: Improvements in or relating to speed controllers for electric motors
IPC: H02P7/26
Filed: 1932-03-02
Abstract: 384,860. Maintaining defined speeds of motors. IGRANIC ELECTRIC CO., .Ltd., 147, Queen Victoria Street, London.- (Assignees of Crout, P. ; 5, Wallace Street, Scotia, New York, U.S.A.) March 2, 1932, No. 6310. Convention date, March 2, 1931. [Class 38 (iii).] A motor M is maintained at constant speed by means of an electron tube 2 controlling the motor circuit, and an interrupter 1 driven by the motor, the interrupter periodically impressing a potential on a condenser 6 and discharging it to a condenser 5 connected with the grid 2c of the electron tube 2. The tube 2 is connected between A.C. mains L1, L2, in series with a differential motor field F1, and the condenser 5 is shunted bv a resistance 4 so that when the motor speed deviates from a certain value, determined by the adjustment of condensers 5, 6, and the resistance 4, the rate at which the condenser 6 is charged and discharged changes, thus altering the potential of. the grid 2c and so regulating the strength of the field F1, to bring the motor speed back to the desired value. The current fluctuations in the field F1 are smoothed by means of a rectifier 10. In a modification the tube 2 is in the motor armature circuit. Full or half wave rectifying tubes may be used, and the charging potential of the condenser 6 may be varied in accordance with the motor speed.
Patent GB-914248-A (GB)
Title: Improvements in or relating to aromatic ethylenically-unsaturated trihydroxyacetophenone derivatives
Inventor: LAFON LOUIS
Filed: 1960-02-23
Abstract: The invention comprises o -ortho-chlorobenzylidene-, o  - orthohydroxybenzylidene-, o -metahydroxybenzylidene-, and o -parachlorobenzylidene-2,4,6-trihydroxyacetophenone, together with a process for the preparation of compounds of the formula:- <FORM:0914248/IV (b)/1> (in which R, R1 and R2, which may be the same or different, are hydrogen, halogen, hydroxy or alkoxy substituents) by reacting substantially equi-molar amounts of 2,4,6-trihydroxyacetophenone and an aromatic aldehyde of formula:- <FORM:0914248/IV (b)/2> in the presence of a strong mineral acid, e.g. hydrochloric acid. Detailed examples illustrate the invention.ALSO:Antispasmodic compositions comprise a compound of the formula <FORM:0914248/VI/1> (in which R, R1 and R2 are the same or different, and represent a hydrogen or halogen atom or a hydroxy or alkoxy group) together with a pharmaceutical carrier.  The compositions may be administered for the treatment of nephritic or kepatic colic or coronaritis or vasoconstrictive diseases, e.g. in the form of cachets, tablets, capsules or suppositories, or by injection. Pharmacological studies on several of the active compounds are also given in detail.
Patent GB-430272-A (GB)
Title: Devices for minimising interference with radio broadcast reception
IPC: H04B15/02
Filed: 1934-02-27
Abstract: 430,272. Generating high-frequency oscillations. BUCKLEY, H. S., Beta Works, Riverside, Putney, London. Feb. 27, 1934, No. 6369. [Class 40 (v)] [See also Group VI] In order to minimize interference with broadcast reception, a diathermy appliance is arranged so that the secondary 3, Fig. 2, of the high-frequency transformer 1 is shunted either by a condenser 8, or, when the switch 16 is open and the electrode 6 is in use, through a circuit which includes the body of the user, a hand-grip or casing 7, and the condenser 8. Fig. 1 shows one form of construction, the hand-grip 7 being fitted with a thumb-piece 23 which opens the switch 16 when the appliance is in use. The secondary windings of the H.F. transformer 1 are separated by layers of paper, which butt against the ends of the containing cylinder 2 and so prevent leakage across to the primary windings. The condenser 8 consists of a metal cylinder 21, a dielectric 22, and the outer surface of the hand-grip. A ring 24 localizes leakage between the electrode 6 and the grip or casing 7. When the electrode 6 is removed the device can be used as an ozonegenerator.
Patent GB-937435-A (GB)
Title: Improvements relating to carbon electrodes for electrolytic aluminium furnaces and to electrode paste for producing such electrodes
IPC: C04B35/532
Filed: 1960-02-23
Abstract: Carbon electrodes are made by baking a paste which comprises a mixture of dry, full-calcined, comminuted granular carbonaceous material containing particles above and below 0,1 mm., finelyground dry uncalcined or partly calcined carbonaceous material containing not less than 2% by weight of volatiles and grain size not exceeding 1 mm. and a liquid carbonaceous binder such as pitch.  The constituents of the paste may be mixed in any desired manner, for example the uncalcined or partly-calcined material and the liquid binder may be mixed before addition of the granular carbonaceous material.  Alternatively all three constituents may be mixed simultaneously in a machine.  Up to 75% of the finely ground material may be replaced by the coarser grained material.  Preferably the finely ground material forms 10-50% of the finished product.  The electrodes find use in electrolytic aluminium furnaces.
Patent GB-416831-A (GB)
Title: Improvements in or relating to gudgeon pins
IPC: F16J1/20
Filed: 1934-02-27
Abstract: 416,831. Gudgeon pins. AKTIE. BOLAGET SVENSKA KULLAGERFABRIKEN, 17, Artillerigatan, Gothenburg, Sweden. Feb. 27, 1934, No. 6385. Convention date, Sept. 2, 1933. [Class 122 (i).] Gudgeon pins mounted in a piston by roller or equivalent anti-friction bearings are provided with bearing surfaces between guide flanges, the diameter of the surfaces being less than the diameter of the outer race by the diameter of a rolling element. The gudgeon pin 3 is formed with reduced diameters at its end between flanges 6 in which are accommodated rollers 4, the outer races for which are formed by sleeves 7, 8 inserted in the piston bosses. These sleeves are retained by spring rings 9. For reducing stresses, deep curves 19 are provided adjacent the sides of the smaller end of the connecting rod. In introducing the pin into position, it together with the rollers is first placed in a holder sleeve which is lined up with the piston bosses and the small end of the connecting rod and is then tapped into position. The small end is clamped into position about the middle section of the pin. When an undivided small end is used, the roller diameter at one end is smaller than that at the other, so that the pin may be introduced into position.
Patent GB-723137-A (GB)
Title: Improvements in or relating to a process and arrangement for the production of soundmotion picture films having magnetic sound track
Inventor: FRIESS HANS
IPC: G03B31/00
Filed: 1952-03-12
Abstract: 723,137. Duplicating sound records. KLANGFILM GES. March 12, 1952, No. 6445/52. Class 40 (2) In a process for the duplication of a sound and picture film, the picture is first photographically reprinted from the original on a number of films provided with magnetic sound strips, and after the completion of the reprinting and developing the sound is recorded, from an original sound strip, on the magnetic sound strips of the prints. The prints 2 and the original sound strip 1, which may be magnetic, are pressed by rollers 6 against feed rollers 5 mounted on a shaft 4. Sound currents from the reproducing head 7 are amplified at 9, passed through amplitude regulators 10 and equalizers 11 and recorded on the prints by recording heads 8. Reproducing heads 12 are connected to amplifiers 13, modulation meters 14, and loudspeakers 15. Signalling marks, e.g. numerals, may be provided on the prints 2 and the strip 1, and may initiate an acoustic signal to inform an operator that the prints and strip are not in synchronism. The magnetic heads may be mounted in or on the rollers 5.
Patent GB-1522221-A (GB)
Title: Resistance element for a resistance thermometer and a process for its production
IPC: H01C7/02
Filed: 1976-02-19
Abstract: 1522221 Temperature variable resistors DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT 19 Feb 1976 [22 Feb 1975] 6564/76 Heading H1K A thermometer resistance element which has a temperature coefficient of resistance of at least 3À85 Î 10<SP>-3</SP> degr.<SP>-1</SP> between 0 C. and 100 C., consists of a layer of Pt on an insulating substrate, the material of which has a higher coefficient of expansion than that of Pt between 0 C. and 1,000 C. Suitable substrate materials are MgO or heat-resistant nickel alloys coated with MgO, Al 2 O 3 , or a silicate glass. The Pt layer may be formed by vacuum evaporation or by cathode sputtering in an oxygen-containing atmosphere.
Patent GB-577654-A (GB)
Title: Improvements in or relating to protective devices for electrical apparatus
IPC: H02H3/08
Filed: 1944-04-08
Abstract: 577,654. Protective cut - out systems. BROOKHIRST SWITCHGEAR, Ltd., and SHREEVE, A. G. April 8, 1944, No. 6582. [Class 38 (v)] In order to render the action of a thermal cut-out definite at minimum values of overload, an electromagnetic relay 13 is used to bring thermal relays 16 into operation by opening contacts 15 when the load-current rises to a predetermined value. The thermal relays open contacts 14a or 14b and thereby cut off the current. Two thermal relays are used in series, one to operate on short heavy loads and the other for prolonged moderate overloads. In Fig. 1 (not shown) a single thermal relay in each line is designed to operate on prolonged moderate overloads. The Specification also refers to the cut-out being a thermal image of the apparatus to be protected, and to making a contact instead of breaking one to bring the thermal device into operation. Specification 494,395 is referred to.
Patent GB-1380995-A (GB)
Title: Electrical circuit for controlling a commutatorless direct-current electrical motor
IPC: H02P3/10
Filed: 1972-02-11
Abstract: 1380995 Automatic control of speed SIEMENS AG 11 Feb 1972 [13 Feb 1971] 6602/72 Heading G3R [Also in Division H2] A brushless motor, driven from a D.C. supply with stator windings excited in dependence upon rotor position, is braked by altering the position of the stator field with respect to the rotor, the D.C. supply being cut off when the rotor speed falls below a preset value. In the embodiment, the stator field is reversed for braking, and the motor drives a spinning pot of a yarn spinning machine motor (2) Figs. 1 and 2 (not shown). Switching the motor on, turns  transistor T 0  on via transistors T 14  and T 15 , and with contact A 1  in its position shown, stator windings W 1  ... W 4  are excited in dependence upon rotor position using Hall generators H 1  H 2  and power transistors T 1  ... T 4  which are controlled by transistors T 5  ... T 8 . As the motor speed rises, transistor T 14  compares a speed reference voltage U n , which may be adjustable, with a speed dependent back e.m.f. from windings W 1  ... W 4  via diodes D 1  ... D 4 , to regulate the motor speed. Contacts b, or x, respectively are closed automatically if the yarn breaks or if a manual stop button is depressed, thus energizing contactor A, whose contact a 1  changes-over, and the excitation of the stator windings, now controlled by transistors T 9  ... T 12 , is reversed, and the motor is braked. The motor speed falls until at a predetermined. speed the speed dependent signal turns transistor T 13  on, turning the winding excitation control transistors T 14 , T 1  5 , To off and interrupting the stator current. The predetermined speed, which may be zero, is set by RC circuit R 1  1 C.
Patent GB-1263972-A (GB)
Title: Purification of chlorosilane hydrides
IPC: C01B33/04
Filed: 1969-02-07
Abstract: 1,263,972. Purification of chlorosilane hydrides. P. K. TAYLOR (Union Carbide Corp.). 7 Feb., 1969 [7 Feb., 1968], No. 6625/69. Heading C1A. Boron impurities are removed from chlorosilane hydrides containing only silicon, chlorine and hydrogen (i.e. SiH a Cl b  wherein a and b are integers 1 to 3 and a+b=4) by dispersing preformed partial hydrolyzates of a chlorosilane in a clear non-turbid liquid body of the chlorosilane hydride and thereafter separating the chlorosilane hydride from the partial hydrolyzates and from boron in combination therewith. The partial hydrolyzates which may -be colloidal are formed by reacting a chlorosilane vapour with water vapour and are compounds containing one or two silicon bonded hydroxyl groups. The chlorosilane vapour and water vapour may be reacted in a zone apart,from the liquid body and then introduced thereto e.g. in a stream of inert gas or the reaction may be carried out in a zone contiguous to the liquid body i.e. the vapour phase above the liquid body. The separation of the partial hydrolyzates and. the hydride may be by distillation, dialysis or decantation. The concentration of the boron impurities into the partial hydrolyzate may be made use of in the analysis of the boron content of a chlorosilane hydride, all the boron content being concentrated into a small quantity of high boiling point, apparently hydrolysed boron compounds, which may be analyzed, e.g. by colorimetric methods. The purified chlorosilane hydride is suitable for the production ;of semi-conductor grade silicon, e.g. by reduction with hydrogen, zinc, sodium or metal hydrides.
Patent GB-1580524-A (GB)
Title: Flow meter
IPC: G01P5/00
Filed: 1978-02-20
Abstract: A flow meter for the accurate determination of the rate of flow of a flowing medium and for the determination of the speed of sound in this medium has a transformer arrangement (24, 26) through which the flowing medium flows. Two cylindrical transformers (24, 26) are provided, of which alternately one transmits acoustic pressure waves and the other receives these pressure waves. The phase difference between the transmitted and the received signals is stored for two consecutive transmit/receive cycles, the difference between two consecutively stored phase differences specifying the magnitude and the direction of the flow of the flowing medium, and the sum of the stored phase differences being a measure of the speed of sound in the flowing medium. The flow meter has a device for automatically compensating changes in the composition of the flowing medium, with the result that the specified rate of flow is correct at any time. <IMAGE>
Patent GB-1100828-A (GB)
Title: Fluid flow control device
IPC: B08B9/032
Filed: 1966-02-15
Abstract: 1,100,828. Tube cleaning devices. CARRIER CORPORATION. 15 Feb., 1966 [31 March, 1965], No. 6661/66. Heading F2N. A body member 12 has passages 14, 16, which communicate with chambers 20, 22 and carries a casing member 36 mounting valve means 40, the two members being biased to the position shown by a spring 38. By squeezing together the members water flows from the passage 14 to the chamber 20 and then to the hollow stem 60, a portion of the water being diverted to advance a piston 62 to cause radial expansion of a resilient sleeve 64 to form a seal in the end of a tube to be cleaned. Continued relative movement of the members cause a port 53 to communicate with the passage 16 so the air under pressure passes through a passageway 55 in the valve stem 46 to the stem 60.
Patent GB-1031478-A (GB)
Title: Improvements relating to spool holders for textile winding apparatus
IPC: B65H54/52
Filed: 1963-02-19
Abstract: 1,031,478. Winding yarn. BARMER MASCHINENFABRIK A.G. Feb. 19,1963 [March 1, 1962], No. 6667/63. Heading D1J. The spool 12, driven by a drum 14, is carried by a cradle 6 pivotable about a shaft 2 as the package grows. To obtain a loosely wound package suitable for dyeing, a releasable spring 17 can be engaged with the arm 10 of the cradle 6 to reduce its loading against the drum 14. To obtain a tightly wound package the spring 17 is disengaged from the arm 10 and engaged under the hook 18. The arm 11 of the cradle can pivot away from the arm 10 when a full spool 12 has to be replaced by an empty one.
Patent GB-559052-A (GB)
Title: Improvements in methods of hermetically closing jars and similar containers
IPC: B65D41/16
Filed: 1942-05-18
Abstract: 559,052. Cellulose-derivative compositions and articles. ENGEL, W. May 18, 1942, No. 6717. Drawings to Specification. [Class 2 (ii)] [Also in Group XVII] For hermetically closing the mouth of a jar or like container by pressing a lid or stopper against the mouth of the container, a thermoplastic washer is provided composed of a mixture comprising nitro-cellulose or ethylcellulose, polyvinyl acetate or polyvinyl acetal, and a plasticizer such as dibutyl phthalate. A specified material, which is not thermoplastic below 100‹C., comprises nitro-cellulose or ethyl cellulose, a polyvinyl acetal, tricresyl phosphate and urea- or melamine-formaldehyde resin.
Patent GB-810170-A (GB)
Title: Preparation of methylolacrylamide
IPC: C07C233/16
Filed: 1957-02-28
Abstract: Crystalline methylolacrylamide is prepared by dry mixing crystalline acrylamide and paraformaldehyde in the presence of a catalytic amount of a base unreactive in the mixture and in the absence of a solvent. Mixing temperatures of up to 100 DEG  C. may be used but room temperatures are preferred.  Specified catalyst bases are triethylamine, tri-n-propylamine, tri-n-butylamine, morpholine, di-isobutylamine, diethylethanolamine, barium oxide, sodium borate, trisodium phosphate and mixtures thereof. Quantities ranging from 0.5 to 1.5 per cent by weight of the acrylamide may be used.  If desired, the mixing may be conducted in the presence of a polymerization inhibitor, such as sodium nitrite.
Patent GB-1358978-A (GB)
Title: Equipment to collect grass-cuttings directly from a gras-mower
IPC: A01D34/42
Filed: 1971-08-11
Abstract: 1358978 Lawn mowers MACLAREN SNOW Ltd 11 Aug 1971 [12 May 1970] 6767/70 Heading AIF In a grass box 17, for use with a mower, grass cuttings are compacted by a transfer member, e.g. an auger conveyor 19, or a reciprocating plunger, and are extruded through an outlet 22 to a collecting box, in use the leading edge of the grass box defining part of the outlet. The transfer member, which may comprise a single auger as shown or two augers of opposite hand (Fig. 3, not shown) can be driven from the cutter drive mechanism by chain or belt drive, or through gearing. The outlet which may be tapered, can include a sprung loaded compacting plunger. The mower may be manually or motor driven.
Patent GB-338465-A (GB)
Title: The treatment of gypsum and alabaster to give it the appearance and hardness of marble
IPC: C04B41/52
Filed: 1930-02-28
Abstract: 338,465. Garner, F. J. G. Feb. 28, 1930. Stone, hardening and colouring.-A process for treating blocks and shaped articles of alabaster or gypsum, to give them the hardness and appearance of marble, consists in drying them by heating to 150‹ to 200‹ C., and impregnating them with a solution in 1 gallon' of water of 1 lb. of concentrated solution of sodium silicate, 1 oz. of magnesium sulphate and 1 oz. of fused calcium chloride. The surface is then polished and rubbed with raw linseed oil.