baber/WOPTO huggingface dataset:
Patent GB-708968-A (GB)
Title: Improvements in the separation of the reaction products formed in the production of acrylonitrile from acetylene and hydrocyanic acid
Filed: 1951-12-07
Abstract: In the production of acrylonitrile from acetylene and hydrocyanic acid in aqueous solution the gaseous mixture leaving the reaction chamber is washed with neutral organic liquid in which acrylonitrile and the by-products formed are soluble, which boils at at least 60 DEG  C. and does not react with the components contained in the gas mixture nor impairs the formation of acrylonitrile in the reaction chamber.  The residual gas being purified acetylene may be recycled to the reaction chamber.  The washing liquor containing acrylonitrile and such by-products as mono-and di-vinyl acetylene, lactic acid nitrile and acetaldehyde and any unchanged hydrogen cyanide is then subjected to fractional distillation to recover the components therefrom.  Specified washing liquids are aliphatic and cyclic hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, acetals, nitriles and inert heterocyclic substances such as petroleum products, paraffin oil, toluene, xylene, tetrahydronaphthalene, methanol, ethanol, propanol, butanol, octanol, decanol, benzyl alcohol, ethylene glycol, trichlorethylene, tetrachlorethane, hexachlorbutane, chlorbenzene, butyl acetate, dibutyl phthalate, dioctyl phthalate, ethylene glycol acetate, monomethyl ethylene glycol ether, dioctyl ether, dibenzyl acetaldehyde butyl or octyl acetal, acrylonitrile, acetonitrile, propionitrile, lactonitrile, benzonitrile, tetrahydrofurane, g -butyrolactone and g -butyrolactam. The washing is preferably effected at between 0 DEG  and 30 DEG  C., the gas mixture leaving the chamber being cooled to room temperature prior to washing.  When the washing liquids are water-soluble, the washed gases are preferably given a second wash with water to remove traces of the organic wash liquid.  The washing may be effected in a packed tower, if desired under p  increase pressure.  Examples are given wherein acetylene and hydrogen cyanide are reacted in aqueous cuprous chloride solution.
Patent GB-713168-A (GB)
Title: Improvements in or relating to amplitude limiter circuits
Inventor: BOFF ALBERT FRANK
IPC: H03G11/02
Filed: 1950-11-23
Abstract: 713,168. Valve limiting circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. July 27, 1951 [Nov. 23, 1950], No. 28717/50. Class 40 (6) An amplitude limiter circuit of the clipper type comprises a biased diode 1 or other unilateral conductor in shunt with the output e and means for superimposing in the shunt path a varying bias which is a function of the input voltage E and counteracts any variation in the output voltage e due to the input E varying. In Fig. 3 showing a limiter for sine waves, the vari able bias is developed by a shunt diode 10 across a load resistor 15 shunted by a smoothing condenser 13, arranged in series with the output diode 1. If R is the value of the output circuit resistor 7, RD the resistance of the output diode 1 and E the input voltage, it is shown that the bias across resistance 15 should be KE where K = RD/R for constant output. In Fig. 4 a double polarity limiter for sine waves is shown comprising two reversely connected shunt diodes 1, 19, with common point of connection between two blocking condensers 17, 18, constant bias Eb applied to one diode 1 and variable bias to the other 19. The common point has, by symmetry, a bias intermediate that of the respective bias on the diodes 1, 19. In Fig. 5 a single polarity limiter for unidirectional pulses is shown, the diode 10b developing from a resistor 24, in shunt with the input through blocking condensers 23, 25, a bias across its load circuit 14, 15 varying with the amplitude of the input pulses and connected in series with the constant bias Eb.
Patent GB-613840-A (GB)
Title: Improvements in or relating to step-and-repeat photographic contact printing machines
IPC: G03B27/06
Filed: 1945-10-30
Abstract: 613,840. Hydraulic machines. HUNTERPENROSE, Ltd., and MITCHELL, A. M. Oct. 30, 1945, No. 28740. (Class 69 (ii)] [Also in Group XX] An electro-hydraulic thruster for use in a step and repeat photographic contact printer (see Group XX) comprises a casing 33 provided with a 'cover member 41 supporting an electric motor 42 having a shaft 43 projecting into the casing: The casing is subdivided by a sleeve 44 supported at 47, while at 49 a tube 48, depending from the cover 41 and apertured at 53, opens out and forms a flange 49 which, together with. the base 45 of the sleeve, which is apertured at 52, enclose an impeller 50 on the shaft 43. Communication between the upper and lower parts of the casing 33 is formed by passages in spaced abutments 51. Within the upper chamber is disposed a piston 54 carrying thrust rods 55. Energization of motor 42 causes rotation of the impeller 50 and a pressure differential above and below the piston whereby oil contained within casing 33 is sucked through the apertures 53 and delivered to the underside of the piston which then rises.
Patent GB-333427-A (GB)
Title: Process for ensuring stability of operation in the electrical cleaning of gases from revolving furnaces
IPC: B03C3/014
Filed: 1929-09-23
Abstract: 333,427. Lodge-Cottrell, Ltd., (Metallges. Akt.-Ges.). Sept. 23, 1929. Gases, treating with electric discharges.-The electrical cleaning of gases from revolving furnaces is stabilized by maintaining the gas entering the cleaner at a temperature above 150‹ C. sufficiently high to increase the conductivity of the dust, whilst reducing the velocity of the gas through the electrical field to about one half of that required when cleaning the gas at lower temperatures. The electrical field may be subdivided, into stages operated at increasing potentials. A suitable temperature for cement kiln gases lies between 200‹-250‹ C, but the temperature used varies with the composition of the gas and the nature of the process.
Patent GB-964618-A (GB)
Title: Improvements in or relating to cylinders or cylinder liners for internal combustion engines
Inventor: BLACKITH FREDERICK
IPC: F02F1/20
Filed: 1962-07-26
Abstract: 964,618. Cylinders. WELLWORTHY Ltd. July 9, 1963 [July 26, 1962], No. 28753/62. Heading F1B. A cylinder or cylinder liner is provided, in the region of the top dead centre position of the piston, with grooves 5 filled with molybdenum. The grooves are filled by metal spraying and the deposit 6 subsequently machined to the cylinder wall diameter.
Patent GB-1554076-A (GB)
Title: 5-(2-furoyl)-5-(2-thenoyl)-5-(3-furoyl)-and 5-(3-thenoyl)-1,2-dihydro-3h-pyrrolo(1,2-a)pyrrole-1-carboxylic acid derivatives and process for the production thereof
IPC: C07D333/38
Filed: 1977-07-11
Abstract: Carboxylic acid esters of the formula <IMAGE>  are prepared by condensation of a compound of the formula <IMAGE> with an amide of the formula <IMAGE> In the formulae, X represents oxygen or sulphur, R represents hydrogen or C1-C4-alkyl, R<1> represents hydrogen, methyl, chlorine or bromine and R<2> represents C1-C4-alkyl. Hydrolysis of the carboxylic acid esters results in the corresponding carboxylic acids and their salts. The compounds are novel and exhibit an anti inflammatory, analgesic and antipyretic action. They are suitable in particular for treating inflammations, pain and febrile conditions.
Patent GB-445771-A (GB)
Title: Improvements in or relating to vertically displaceable rudders for aircraft
IPC: B64C13/00
Filed: 1934-10-09
Abstract: 445,771. Controlling aircraft. TEISSEYRE, J., 7, Sandomierska ul, Warsaw, and ZDANIEWSKI, A., Biala Podlaska, both in Poland. Oct. 9, 1934, No. 28927. [Class 4] In an aircraft having a vertically displaceable rudder, the pivot or axis about which the rudder turns is displaceable vertically parallel to itself. The rudder 4<1> which is rotatable about an axis 2<1> may be associated with a tail plane 3<1> capable of vertical movement in a slot in the rear part of the fuselage 1<1>. The tail plane may be independently rotatable about the axis of rotation of the rudder, and an additional control surface 4<11>, capable of independent rotation, may be pivotally attached to the rudder. The rudder, together with the tail plane may be raised or lowered by linkwork operated by screw and nut gearing. Two arms 6, 7, Fig. 12, of equal length are pivotally attached to the tail plane, to which the rudder is rotatably attached, at 33, 34 and to the fuselage at 8, 9 respectively. A third arm 36 of equal length pivoted to the fuselage at 37 is connected to the arm 6 at a joint 35 and is provided with a threaded nut 41 engaged by a screwed spindle 39 rotated by bevel gears 45 from a control shaft 46. A link 32 controlling the rotation of the rudder is universally mounted at its ends and moves with the links 6, 7 which control the vertical displacement of the rudder and tail planes.
Patent GB-281239-A (GB)
IPC: C06B41/02
Filed: 1927-10-31
Abstract: 281,239. Eschbach, W., and Friederich, W. Nov. 23, 1926, [Convention date]. Blasting fuzes.-An igniting pellet for electric blasting fuzes is made from the mono- or polybasic lead salts of di- or tri-nitrophenol.
Patent GB-241743-A (GB)
Title: Improvements in tea-pot stands, table-mats, trays and the like
IPC: A47G23/03
Filed: 1924-12-05
Abstract: 241,743. Coulthard, Ltd., W., and Coulthard, E. S. Dec. 5, 1924. Stands; mats; trays.-A tea-pot stand, tablemat, tray, or the like comprises a cork or similar body and a facing of waterproof, washable, and non-absorbent material secured together by a metal ring, frame, or mount. As shown, the cork or non-conducting body a, and facing-material b, such as thin linoleum, with or without an intermediate disc d of cardboard or the like, are secured within and by an annular sheet-metal stamping c comprising two right-angled webs c<1>, c<2>, the web c<1> surrounding the periphery of the cork disc a and the other web c<2> surrounding the outer part of the facing-material on the top of the stand. The edge of the web c' is rolled or embedded into the periphery of, or over the edge of, the cork disc a. The depth of the web c<1> is preferably less than the depth of the disc a so that the bottom of the cork projects below the lower edge of the mount c and prevents the mount from coming into contact with a table &c. when the article is in use.
Patent GB-1010222-A (GB)
Title: Semiconductor diode base
IPC: B22F7/02
Filed: 1962-07-30
Abstract: A semi-conductor diode base consists of an outer layer of silver or copper, an intermediate sintered layer consisting of by weight (a) 40-70 parts silver powder with 60-30 parts graphite powder, or (b) 38-69 parts copper powder with 62-31 parts graphite powder and an overlying layer of silver or copper.  In the preferred method the outer layers of silver or copper are also sintered but these layers may also be flame sprayed on to the sintered intermediate layer. Separate layers of the required powders of minus 325 mesh are placed in a die and compacted together at 10-40 tons p.s.i. and then sintered at 1500 DEG F. in a vacuum or neutral atmosphere. The sintered composite may then be coined at 20-40 tons p.s.i. Alternatively the powder layers may be hot pressed.
Patent GB-259412-A (GB)
Title: Improved means for replacing existing side-by-side valves of internal combustion engines by overhead valves
IPC: F02B69/00
Filed: 1925-11-19
Abstract: 259,412. Lago, A. F. Nov. 19, 1925. Cylinders, heads for, passages and ports of, and arrangement of igniters in.-Means for converting a side-valve engine into an overhead-valve engine comprises replacing the cylinder head by a head having inlet and exhaust passages 8, 9 which are connected to the existing inlet and exhaust piping, the existing passages in the cylinder block being closed bv plates 6; the inlet passages 8 are common for two adjacent cylinders, whereas the exhaust passages 9 are separate. The valves 12 are operated from the existing cam mechanism by rockers 21 and push rods 23 which slide in the old valve guides and guides 25, considerable clearance 24 being allowed. Pin joints between the rod 23 and rockers 21 may comprise a ball 27 and a socket 26. Springs 28 return the push rods. Sparking plugs 29 are arranged as shown. The Provisional Specification describes inlet ports which are larger than the exhaust ports and sparking plugs which are arranged at an angle of 60‹ to the crank axis when viewed in plan.
Patent GB-229386-A (GB)
Title: Improvements in or relating to screwing dies and die heads
IPC: B23G5/12
Filed: 1923-11-21
Abstract: 229,386. Bowen, T. O. Nov. 21, 1938. Closers. - In a screwing die-head the dies are adapted to have new teeth cut thereon when worn or broken and are interchangeable. The dies 1 of rectangular or other shaped bar are long enough to have new teeth cut thereon and have locating holes 6, which are used in successive repairs to receive a pin engaging either the die-holder 3 or a repairing-jig when removed from the head. In a modification, the dies may be double-ended and reversible.
Patent GB-852608-A (GB)
Title: Improvements in pudding compositions
IPC: A23L9/10
Filed: 1958-09-16
Abstract: A composition for interaction with milk in making an instant pudding comprises a phosphate coagulating agent for milk protein and a coagulation accelerator, a pudding stiffening agent, a dry-to-the-touch, free flowing, readily dispersible granular shortening in which the fat has a hydrophilic lipin dissolved therein, e.g. a partial ester of a polyhydroxy compound and a fatty acid, and a winterized edible oil distributed throughout the composition and having a solidification point substantially below the freezing point of milk.  The stiffening agent is preferably pregelatinized starch but alternatively starch derivatives, natural gums or cellulose derivatives may be used.  According to an example, a composition for preparing a vanilla pudding comprised 20 g. pregelatinized starch, 0,35 g. winterized cottonseed oil coated with 66,5 g. sugar, 0,45 g. granular shortening containing 10% based on its fat content of monoglyceride emulsifier, 1.5 g. each of tetrasodium pyrophosphate and disodium orthophosphate, and minor amounts of flavouring and colour.  When added to one pint of cold milk and beaten in to the milk for one minute a pudding solution free of aeration was produced, which set in about five minutes. Specifications 741,076 and 850,371 are referred to.
Patent GB-447540-A (GB)
Title: Improvements in or relating to the production of effects on filaments, yarns, straws or the like or fabrics containing such materials
IPC: D06Q1/04
Filed: 1934-10-17
Abstract: Effects are produced on filaments, yarns, straws or the like containing an ether or an organic ester of cellulose, or on fabrics containing such materials, by applying thereto a suspension of a comminuted effect material in a solution of a film-forming substance in a medium containing 25--50 per cent of a volatile solvent for the cellulose derivative of the material treated, and a volatile non-solvent therefor, so as to bond the effect material to the filaments, yarns, &c.  The film-forming substance is preferably cellulose acetate or polymerized vinyl acetate, other suitable substances are water insoluble esters and ethers of cellulose, chlorinated rubber, resinous substances such as polyvinyl and polyacrylic resins.  Examples of volatile non-solvents, or diluents, are alcohol, benzene, toluene, xylene, butyl acetate, or mixtures thereof.  In addition to the volatile solvent, a less volatile solvent may advantageously be added, e.g. ethyl lactate, diacetone alcohol, dioxane.  Effect materials may be powdered metals, titanium or zinc oxide, barium sulphate, diacetyl or dibenzoyl benzidine, fish scales and insoluble dyestuffs.  In examples: (1) A cellulose acetate fabric is dyed black and printed with a mixture of 15 parts by weight of bronze powder and 85 parts of a solution containing 10 per cent of cellulose acetate, 35 of acetone, 15 of ethyl lactate, 20 of xylene, 18,5 of methylated spirits, and 1,5 of benzyl alcohol; (2) a cellulose acetate fabric is dyed bright green and printed with a mixture of 30 parts by weight of bronze powder, 10 of ethyl lactate and 80 of a solution containing 50 per cent of polymerized vinyl acetate, 35 of xylene, and 15 of acetone.
Patent GB-1009494-A (GB)
Title: Improvements in relief valve mechanisms
Inventor: TENNIS FRANCIS HENRY
IPC: F16K17/04
Filed: 1962-08-02
Abstract: 1,009,494. Valves. HYDRAULIC UNIT SPECIALTIES CO. Aug. 2, 1962, No. 29756/62. Heading F2V. [Also in Division G3] A valve for relieving abnormally high or low pressures in a fluid system comprises a main poppet valve 14 controlling a by-pass passage 9 between a system conduit 6 and a drain conduit 8. The valve poppet 14 is hollow and slidable over a fixed body part 16 to form a pressure chamber 52 freely connected by annular passage 50 to a chamber 52<SP>1</SP>. The chamber 52 is normally in communication with the conduit 6 by a through passage 55 in a tube 53 which loosely fits in a bore 54 in the valve poppet. The chamber 52 has a vent outlet controlled by a pilot poppet valve 25 which, when open, connects the chamber to the drain 8 by an axial bore in the body part 16, parts 45, and annular passages 44, 48, which allow free flow of the fluid. The pilot poppet valve 25 carries a disc 28 and a light spring 56 acts in a closing direction on the main poppet 14. In operation, the pressure in chambers 52 and 52<SP>1</SP> is equal to that in line 6 under normal conditions and acts to hold the main valve 14 closed against the action of the fluid pressure acting in passage 9 on the end face of the valve 14. When the pressure reaches a predetermined value, the pilot poppet 25 opens to vent chamber 52, 52<SP>1</SP> and the main valve 14 opens under the action of the pressure in the passage 9. At the same time, this pressure acting on the tube 53 moves the tube to engage the disc 28 of the pilot poppet. This movement provides that the pilot poppet is held open and the flow through the tube to the chambers 52, 52<SP>1</SP> from conduit 6 is restricted. Restricted flow will take place due to the loose fit of the tube in the bore 54. When the pressure in conduit 6 drops sufficiently to allow the pilot poppet valve 25 to close under the action of spring 33, the pressure in chambers 52, 52<SP>1</SP> again rise to that in the conduit 6 to close the main valve poppet 14. In the event of the pressure in the conduit 6 dropping below that in the drain conduit 8, which is at atmospheric pressure or slightly above, the main valve 14 opens to allow flow from the drain conduit 8 to the system conduit 6. This is achieved by a surface 47 on the main poppet 14 which is subjected to pressure in the drain conduit 8. Specifications 950,131 and 985,950 are referred to.
Patent GB-865888-A (GB)
Title: A self-locking electrical isolating switch
Inventor: SINDAHL KARL GUSTAV
IPC: H01H1/52
Filed: 1959-09-01
Abstract: 865,888. Air-break switches. ALLMANNA SVENSKA ELEKTRISKA A.B. Sept. 1, 1959, No. 29764/59. Class 38 (5). An isolating switch has a resiliently-mounted fixed contact 5 and a movable contact arm comprising three links 1, 2 and 8. The link 1 is pivoted at one end at a pivot 3 on a fixed support and at the other end at a pivot 6 at one end of the link 8. The link 2 is pivoted at one end at a pivot 4 on the support and at the other end at a pivot 7 intermediate the ends of the link 8 which carries a contact member 9. In the closed position shown, the centre of the zone of contact between the fixed and moving contacts 5, 9 lies substantially on a line extending through the pivots 4 and 7 and the pivot 6 lies within a triangle having its corners at the pivots 3 and 7 and the centre of the zone of contact. This disposition of the parts results in the movable contact arm being retained in a stable position with the contact pressure being applied by a spring 11 and/or a spring or springs associated with the pivots.
Patent GB-1153571-A (GB)
Title: Improvements in or relating to Mowers
Inventor: MORRIS LESLIE PERCY
IPC: A01D34/13
Filed: 1965-07-14
Abstract: 1,153,571. Mowing machines. LESLIE P. MORRIS Ltd. 23 Aug., 1966 [14 July, 1965], No. 29769/65. Heading A1F. The undersurfaces of the knife sections 20 and possibly also the ledger surfaces 26 are transversely concave to prevent the mower becoming clogged.
Patent GB-404426-A (GB)
Title: An improved mechanism to operate hydraulically the valves of an internal combustion engine
IPC: F01L9/11
Filed: 1932-10-25
Abstract: 404,426. Valve gear ; reversing. THATCHER, A. J., and THATCHER, G. R., Atworth, near Melksham, Wiltshire. Oct. 25, 1932, No. 29785. [Classes 7 (v) and 7 (vi).] In fluid-actuated valve gear in which a camactuated plunger 1 acts upon fluid in a conduit 7 connected to the valve tappet, the plunger 1 is fitted with a second plunger which is arranged to slide in or over the plunger 1 for making up leakage from the conduit 7, the second plunger being formed with a surface adapted to seat upon the plunger 1 so as to act as a valve. The cam 5 works in an oil reservoir which is open to the rear of the second plunger 10 and the plunger 10 is connected to the cam follower 15. On the return stroke, the plunger 1 is stopped by a shoulder 11, but the plunger 10 continues its return movement so that its head, which acts as a valve, becomes unseated from a surface 17 on the plunger 1, thus opening a port 13 and allowing oil to enter through a groove 12 and the port 13 into the column of actuating-fluid. On the forcing stroke, the plunger 10 is brought again on to the seating 17, forcing any oil required to make up leakage into the conduit 7, and returning the surplus to the reservoir through the groove 12. The cam 5 may act on a series of plungers mounted radially in a ring 2 and connected to the inlet valves of the several cylinders of the engine, and a second cam and set of plungers may be arranged at the side of the first for actuating the exhaust valves. Timing of the valves is then adjusted by angular adjustment of the rings 2 about the cams ; and by retarding the inlet and advancing the exhaust valves sufficiently, reversing may be obtained, a second magneto being provided for reverse running.