baber/WOPTO huggingface dataset:
Patent GB-723757-A (GB)
Title: Improvements in or relating to production of hydrogen cyanide
IPC: C01C3/02
Filed: 1952-12-05
Abstract: Ammonia is removed from hydrogen cyanide-containing gases produced by the reaction of ammonia, a gaseous hydrocarbon and oxygen in the presence of a platinum metal catalyst by scrubbing the gases with an aqueous sulphuric acid solution containing at least 25 per cent, preferably 25-30 per cent, of ammonium sulphate under such conditions that the pH of the absorbent solution is maintained at below 4, preferably 1-3.  The temperature of the absorbent solution is kept as high as possible in order to prevent solution of the hydrogen cyanide.  The feed gases may enter the absorption system at a temperature of 120 DEG -130 DEG C. and the temperature of the absorption system may be maintained at 80 DEG -90 DEG C.  The desired pH may be ensured by means of an automatic pH controller which measures the pH of the effluent and causes the introduction of additional acid into the absorbent solution when necessary.  The absorbent solution may be regenerated by evaporation, to crystallize out ammonium sulphate, followed by addition of acid and water, and recycled.  The preferred absorbent solution contains 3.5 per cent of sulphuric acid, 30 of ammonium sulphate and 66.5 per cent of water. Specification 361,004 is referred to.
Patent GB-1362337-A (GB)
Title: Process for the preparation of 3- beta-dialkyl-aminoethyl - 4-alkyl  -7-carboethoxymethoxycoumarins
IPC: C07D311/16
Filed: 1972-07-03
Abstract: 1362337 Coumarin derivatives GRODZISKIE ZAKLADY FARMACEUTYCZNE " POLFA " PRZEDSIEBIORSTWO PANSTWOWE 3 July 1972 [19 July 1971] 31019/72 Heading C2C Compounds of formula wherein R 1 , R 2  and R 3  each represent a C 1-3  alkyl group are prepared by action of an alkali metal carbonate or ammonia on the novel ZnCl 2  complex of the above compounds obtained by treating the reaction products of a coumarin of Formula (IV) wherein X is a halogen atom and an amine R 2 NHR 3 . The intermediates of Formula (IV) are obtained by reaction of a compound of Formula (III), below, with a halogenoacetic acid ethyl ester. The compounds of Formula (III) are prepared by reacting a compound of Formula (II) with a hydrogen halide in an anhydrous media in the presence of phosphorous acid. Reference has been directed by the Comptroller ,to Specification 1,014,053.
Patent GB-1473325-A (GB)
Title: Spark ignition systems for internal combustion engines
IPC: F02P15/00
Filed: 1973-06-29
Abstract: 1473325 Ignition circuits LUCAS INDUSTRIES Ltd 18 June 1974 [29 June 1973] 31082/73 Heading F1B The invention relates to a spark ignition circuit for an internal combustion engine of the kind comprising a capacitor 12 which is charged through a rectifier 13 from the secondary winding 11 of a transformer, the capacitor being connected to a pair of output terminals 14, 15 by means of a voltage sensitive device 16 and the pairs of output terminals in use being connected to a sparking plug 17 of the engine. The transformer has a primary winding 18 connected in series with the collector emitter path of a transistor 21 and the terminals 19, 22 of a source of supply and a resistor 31 for supplies base drive to the transistor and a feedback winding 23 is provided on the transformer and is operable to effect switching of the transistor according to the invention the circuit comprises means 25, 26, 27 responsive to the supply voltage for varying the effective value of the resistor. In a modification (not shown) a resistor is connected in parallel with the diode 24 and the base of the transistor 21 is connected directly to the collector of a PNP transistor whose emitter is connected through a resistor to a point intermediate a Zener diode and a resistor which are connected in series across the source of supply as described, the circuit is applied to a gas turbine engine.
Patent GB-773139-A (GB)
Title: Manufacture of salts of streptomycin and its derivatives
Filed: 1955-10-31
Abstract: Salts of streptomycin and dihydrostreptomycin with acids stronger than carbonic acid are produced by reacting the carbonate of streptomycin or dihydrostreptomycin with an acid of the specified type.  Simple or mixed salts may be prepared.  The reaction is carried out in solution, in suspension or in solid form.  Water and aqueous organic solvent mixtures are used as solvents.  Alcohols, aliphatic and cyclic ethers, ketones, e.g. acetone, esters and aliphatic or alicyclic hydrocarbons are used for suspensions.  The desired salt is recovered by (a) removing the solvent by evaporation or lyophilization or (b) addition of a non-solvent.  Examples describe the preparation of (a) streptomycin tri-p-aminosalicylate; (b) di-hydrostreptomycin salt of ethylene diamino-tetra-acetic acid; and (c) dihydrostreptomycin tri-penicillinate G.  The carbonates are prepared by reacting streptomycin or dihydrostreptomycin, if desired in the form of their salts, with carbonic acid or its appropriate salts or with ion exchangers, preferably in solution, either in water or in organic solvents or in mixtures thereof or in suspension in organic agents.  Carbonates are white amorphous powders, easily soluble in water, forming a stable solution of alkaline pH.
Patent GB-208535-A (GB)
Title: Improvements in variable resistances
IPC: H01C10/26
Filed: 1923-12-11
Abstract: 208,535. Soc. Belge Radio-Electrique. Dec. 18, 1922, [Convention date]. Variable resistances; potentiometers.-A variable resistance and potentiometer comprises a wire 3 wound on a core having a helicoidal projection 2-2 engaging a spring contact 10 so that as the core is rotated the point of contact moves axially. The ends of the resistance are connected to a spindle 4 conductively mounted in one end 6 of the frame and a spindle 5 mounted in and insulated from the other end 7. The contact 10 is mounted on the side 9 which is insulated from the rest of the frame. Alternatively the core may be stationary and the contact rotatable.
Patent GB-651319-A (GB)
Title: Improvements in or relating to gas turbine engine power plants
Inventor: FOSTER-PEGG RICHARD WIGMORE
Filed: 1948-12-01
Abstract: 651,319. Gas turbine plant. ROLLSROYCE, Ltd. Dec. 1, 1948, No. 31176. [Class 110(iii)] In a gas turbine plant comprising high and low pressure turbines driving respectively high and low pressure compressors and re-heating between the turbines, the low-pressure turbine has angularly adjustable nozzle guide vanes. These vanes are held at maximum throat area for low loads and regulation of the plant over the whole or part of the higher range of load is effected by adjustment of the nozzle vanes so that the nozzle area increases with increases in the supply of fuel to the re-heat chamber. The exhaust from a high-pressure turbine 19, 21, passes through an air pre-heater 40 and a re-heating chamber 43 before the low pressure turbine 24. At low load, regulation is effected by control of the fuel supply to the combustion chamber 14. At increasing load, turbine 19, 21 will run at constant speed and the adjustable nozzle guide vanes of turbine 24 are moved towards their minimum throat area position. Further power is obtained by opening the preheater byepass valve 42 and finally by admitting fuel to the re-heating chamber 43, the nozzle vanes of the turbine 24 being opened in agreement with the increase of fuel to the chamber 43.
Patent GB-1211369-A (GB)
Title: System for producing a repetitive current waveform
Inventor: OLIVER BERNARD M
IPC: H03K4/62
Filed: 1967-10-05
Abstract: 1,211,369. Shaping the current in inductive loads. HEWLETT-PACKARD CO. 5 Oct., 1967 [5 Oct., 1966], No. 31226/70. Divided out of 1,211,368. Heading H3T. The subject-matter is the same as is disclosed in Specification 1,211,368 but the claims relate to the series resonating of the inductance in order to shape the first portion of the current waveform produced e.g. to adapt a deflection waveform to flat-faced tubes.
Patent GB-345280-A (GB)
Title: Improvements in and relating to warm air hand-driers
IPC: A47K10/48
Filed: 1929-10-15
Abstract: Apparatus for drying the hands by means of a stream of warm air is characterized by the provision of a blower, and a nozzle therefor, so chosen that the dynamic pressure of the issuing air-stream, at a point 5 cms. from the delivery orifice, amounts to 50-70 mm. of water.
Patent GB-946936-A (GB)
Title: Improvements in rail pads
Inventor: DART MERVYN REGINALD
IPC: E01B9/68
Filed: 1960-09-12
Abstract: 946,936. Chair pads. BRITISH RAILWAYS BOARD. Dec. 12, 1961 [Sept. 12, 1960], No. 31377/60. Heading E1G. A resilient rail pad is provided with a number of truncated hexagonal pyramids 10 on its surface. The bases of the pyramids may be coincidental with one another on opposite faces of the pad.
Patent GB-685091-A (GB)
Title: Table cigarette lighter
Inventor: LIPIC SYLVESTER GEORGE
IPC: F23Q2/34
Filed: 1950-12-27
Abstract: 685,091. Lighters. RITEPOINT CO. Dec. 27, 1950, No. 31431/50. Class 75(iii) A table lighter has a base member 14 attached thereto by an externally - inter - n a l l y threaded filling tube 15 passed through a hole in the flat bottom of its fluid reservoir 26 and secured and sealed therein, such tube being also provided with a closure plug 45. The tube 15 is held in position in the reservoir by a nut 42 and the reservoir is sealed by a disc 43 clamped between a flange 38 formed on the tube 15 and the bottom of the reservoir 26. The base member 14 is covered by a removable transparent ring 49 and carries extra flints and a wick in a groove 48. A fluid well 24 containing a wick 19 held in a slotted tube 23 is filled from the transparent reservoir 26 by opening a valve 21. A cover 16 is rotated about a pin 34 passed through a boss 27 channelled at 28 to receive members 29 the outer ends 33 of which are passed through and bent over against the side 32 of a recess formed in the lighter body. A spring- loaded plunger 36 holds the cover 16 in the open or closed position.
Patent GB-505770-A (GB)
Title: Improvements in rubber hydrohalides
IPC: C08C19/16
Filed: 1937-11-16
Abstract: 505,770. Rubber hydrohalides. WINGFOOT CORPORATION. Nov. 16, 1937, No. 31448. Convention date, March 23. [Class 70] A solution of rubber hydrohalide prepared by treating a solution of rubber in benzene or like organic solvent with hydrogen halide, is neutralized at a temperature above that at which gelation occurs. Benzene and like solvents, e.g. toluene and xylene, give rubber hydrohatide solutions which gel on cooling. The neutralization is preferably carried out with solid alkaline compound such as soda ash or sodium sulphate of fine particle size. The hot solution may be allowed to percolate. through a thick bed of the alkali, or the alkali may be stirred into the solution. After neutralization, the solutions are advantageously filtered hot and applied hot to form coatings or films. Stabilizers such as hexamethylenetetramine or other stabilizer described in Specification 437,304, may be added, and also plasticizers, e.g. paraffin wax or butyl stearate, colouring matter and other compounding ingredients. In an example, a solution of 250 lb. of rubber in 3,321 1b. of benzol is mixed with 68 lb. of soda ash and 250 gallons of benzol. The mixture is gradually heated to 140‹ F. during a period of 10À5 hours and then an additional 10 1b. of soda ash is added and heating at 140‹ F. continued for 2 hours. The mixture is then cooled to 130‹ F. and filtered. The Specification as open to inspection under Sect. 91 comprises also the hot neutralization of non-gelling solutions of rubber hydrohalides in solvents such as chloroform. This subjectmatter does not appear in the Specification as accepted.
Patent GB-832428-A (GB)
Title: Improvements in or relating to the control of electric fan motors
Inventor: ENDEAN KENNETH NORMAN
IPC: G05D23/275
Filed: 1957-10-08
Abstract: 832,428. Control of D.C. motors; controllers. B.T.U. (MANUFACTURERS) Ltd. Oct. 8, 1957, No. 31450/57. Class 38 (3). [Also in Group XXXV] An electric motor 1 which drives a fan for forcing air through a heat-exchanger into a space to be heated is connected in series with a resistor 2 adapted to be short-circuited by time-delay contacts 71 for a period after the motor has been switched-on so as to ensure that the motor is started and then operated at low speed. A thermostatic switch 3 is located in the space to be heated, contacts 31, 33 being engaged when the temperature falls, and contacts 32, 33 when it rises. A further thermostatic switch 4 prevents the motor from being started until the temperature of the heat-exchanger has risen to a predetermined value, whilst a time switch 5, renders the system inoperative during the night, for example. A manual switch 6 has alternative positions for " high-speed heating," " lowspeed heating " and " cooling," and, in the first and third positions of the switch, the resistor 2 is short-circuited so that full voltage is applied to the motor when the appropriate switches are closed. Thus, when the switch 6 is in its first position, the motor is energized to provide warm air when switches 4, 5, and contacts 31, 33 are closed. When the manual switch is in its third position, cool air is provided during the periods that switch 5 and contacts 32, 33 are closed. If the system is set for " low-speed heating " however, the resistor 2 is short-circuited by the contacts 71 only during the initial starting period. The time-delay unit 7 may comprise a bimetallic strip heated by a coil connected to terminals 72, 73. In a modification, the contacts 71 are part of an electromagnetic relay having coil 80 and change-over contacts 74. When voltage is applied to terminals 72, 73, a capacitor 75 is charged through rectifier 76 so that a timing capacitor 78 is charged through resistor 79. When the voltage across the capacitor 78 reaches a predetermined value, coil 80 becomes effective to open contacts 71 and change-over the contacts 74, whereby the capacitor 78 is discharged through resistor 81. The coil 80 is still energized however, through resistor 79 and the relay is held in its operated condition. As soon as the power supply is disconnected from the terminals 72, 73, the capacitor 75 discharges through resistor 79 and coil 80, so that the relay is quickly released.
Patent GB-877615-A (GB)
Title: Improvements in or relating to the production of laminated structures
IPC: B29C70/30
Filed: 1958-10-02
Abstract: 877,615. Laminates. ALCOCK, P. H. Oct. 2, 1959 [Oct. 2, 1958], No. 31504/58. Class 140. [Also in Group XXXIII] A method of producing a reinforced sandwich structure comprises applying a thick coating of a film-forming synthetic resin and hardener to a mould or former the surface of which is treated to prevent sticking of the film or skin to the former, then applying a woven fibre fabric to the coated former and applying to the surface of the skin so formed, evenly over the entire surface, a layer of a hardenable synthetic resin adhesive, pressing the cellular core material, cut into tiles of suitable size and shape, on to the layer of adhesive so that the adjacent edges of the tiles are in close contact, the said edges being coated with the adhesive and the tiles being laid so that the joints between parallel rows of tiles are in alignment and finally attaching a skin to the exposed surface of the core with the same or a compatible synthetic adhesive. Suitable skin material is glass fibre reinforced epoxide resin sheet. The resin may be epichlorhydrin bis-phenol condensation product. The core material is foamed or expanded plastic. There may be interposed between the core and the skin a synthetic foam layer consisting of a synthetic resin adhesive with a micro-balloon filler consisting of phenolic resin substances. The skin may be formed in situ by applying a thick coating of film-forming synthetic resin and hardener to a mould, then applying a glass fibre woven fabric to the coated former and applying pressure to force the resin composition between the fibres of the fabric. In making a self-buoyant dinghy as shown (Figs. 1 and 3), the inside of mould 1 is coated with epoxy resin moulding mix 2, glass fibre cloth 3 is laid thereon, and on top of this an epoxy resin cement mix. The core tiles, cut and shaped from cellular polyvinyl chloride board are laid on and pressed into the resin cement. The cement is well brushed into the tile edges whereby a strong membrane 6 is formed between the inner and outer skin. A layer of synthetic foam is then laid on the tiles and the second skin 5 is formed thereon in the same manner as skin 3.
Patent GB-1267506-A (GB)
Title: Improved footwear
Inventor: MCNEILLIE ROBERT
IPC: A43B7/02
Filed: 1968-03-21
Abstract: 1,267,506. Boots &c. R. McNEILLIE and J. S. KENNEDY. [21 March, 1968; 2 July, 1968], Nos. 13686/68 and 31521/68. Heading A3B. [Also in Division H5]  A heated insole consists of an electric heating element formed of a length of resistance heating strip or wire 3 sandwiched between two layers 1, 2, at least one of the layers being of a material having inherent resilience in a direction normal to its plane. The upper layer 1 may be cork faced with a fabric and the lower layer may be a pile fabric. Alternatively both layers may be of a rubberized material. The element 3 supplies between 5 and 20 watts, preferably between 6 and 12 watts, and is so arranged that the thermal output/ unit area is higher at the toe end than at the heel. The insole is provided with a supply lead 4 at the inside of the waist region, the lead terminating in a component part of a plug/socket pair. The insole may also incorporate a thermally sensitive cut-out switch.
Patent GB-1083015-A (GB)
Title: Hot top retainers
Inventor: BAUER FERDINAND
IPC: B22D7/10
Filed: 1965-07-23
Abstract: 1,083,015. Hot tops. FOSECO TRADING A.G. June 28, 1966 [July 23, 1965], No. 31557/65. Heading B3F. A hot-top 1 of an ingot mould 2 is retained in position during a casting operation by a box 4 which is releasably fastened, by a hooked bar 10 frictionally engaging within an aperture 9 in a locking arm 7, to a flange or castellation of the mould 2. In a modification (Fig. 2, not shown) the hooked bar (14) is tightened on to the mould by wedges (15), (16) acting in a slot in said bar.
Patent GB-698271-A (GB)
Title: Improvements in or relating to process of making 5-nitro-2-furaldehyde thiosemicarbazone
Inventor: RAFFAUF ROBERT FRANCIS
IPC: C07D307/76
Filed: 1950-12-29
Abstract: 5 - Nitro - 2 - furaldehyde thiosemicarbazone is obtained by the action of 5-nitro-furfural diacetate on thiosemicarbazide in acid solution with heating, at a pH below 4.0 and preferably below 3.0, thus dispensing with the step of hydrolysing the diacetate. A strong mineral acid is preferably added to produce the required pH.  In the example, the reaction takes place in aqueous ethyl alcoholic solution in the presence of sulphuric acid. Specification 620,888 is referred to.
Patent GB-1527450-A (GB)
Title: Digital memory coin testing method and apparatus
Filed: 1977-07-27
Abstract: 1527450 Testing coins MARS Inc 27 July 1977 31602/77 Addition to 1452740 Heading G4V The subject matter of this Specification is similar to that of parent Specification, but the programmable memory of the parent is replaced by a pre-programmed memory.
Patent GB-338317-A (GB)
Title: Improvements in lapping machines
IPC: B24B37/08
Filed: 1929-10-21
Abstract: 338,317. Norton Co. Oct. 19, 1928, [Convention date]. Block, rubber, and like apparatus; disc apparatus; spindle mountings. -In a lapping-machine having a rotating upper lap 14, a stationary or rotatable lower lap 12, and a movable or stationary work cage 15, the upper lap is raised and lowered by power-operated means, provision also being made for manual operation and for varying the pressure of the lap upon the work. The lap 14 is mounted on a support 18 adjustably carried on a vertical shaft 20 by means of members 23, 24 having contact on a spherical surface 25, screws 26 serving to allow of adjustment; the members may be left free during lapping and the lap allowed to adjust itself during the working of the machine. The shaft 20 is mounted in bearings 36, 37 in a sleeve 35 slidably keyed in a housing 31, and the sleeve has thereon teeth 45 engaged by a pinion carried by a shaft 47, which carries a worm-wheel 48 driven by a worm 50 slidably keyed on a shaft 52, and pressed by a spring 54. The worm may be driven in either direction, through gearing 67, 66 from a shaft 65 adapted to be driven, through a friction clutch 70, by open and crossed belts 61, 62, the clutch member 70 being movable by an arm 73 moved by a link 76 and a hand lever 77. In order to arrest the lap at any predetermined position in its upward or downward movement, the lever 77 is provided with an arm 80 carrying a yoke member 81 which projects into the housing 31 and straddles a screw 85, rotatably mounted on the sleeve 35 and carrying a non-rotatable nut 90, adjustable by rotation of the screw. Contact of the nut, or of a collar 86 on the screw, with the member 81 moves the lever 77, throwing the clutch into neutral position. The position of the lap is adjusted by hand by a wheel 100, which may be clutched to the shaft 52, and, with the lap resting on the work, the pressure may be adjusted by rotation of the wheel which causes compression of the spring 54, with consequential increase in the pressure of the lap on the work; the spring also yields if pressure on the lap is excessive. Specification 254,919 is referred to.
Patent GB-999390-A (GB)
Title: Improvements relating to bolts
Inventor: MIERS FREDERICK WILLIAM
IPC: E05C1/04
Filed: 1962-08-21
Abstract: 999,390. Sliding bolts. ALEXANDER (SILVERTHORNE) Ltd. July 2, 1963 [August 21, 1962], No. 32004/62. Heading E2A. In a bolt of the kind comprising a rod-like bolt proper 11 which is slidable in a barrel 10 for engagement with and disengagement from a keeper 12, the bolt proper having a lateral extension or projection 17 facilitating sliding thereof, the barrel and or the bolt proper is or are made from a synthetic resinous material which is inherently slightly deformable and resilient, the barrel comprising a C-section sleeve having integral outwardly and oppositely extending apertured flanges 13 for securing to a door or the like so that the bolt proper 11 and barrel 10 may be assembled by temporary deformation of the one or the other as the bolt proper is moved laterally into the sleeve. As shown, the barrel is provided with divergent faces 19 to facilitate assembly.
Patent GB-777201-A (GB)
Title: Improvements in or relating to apparatus for measuring the rate of flow of liquid
Inventor: BURG DIRK VAN DEN
IPC: G01F3/38
Filed: 1955-11-09
Abstract: 777,201. Liquid meters. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. Nov. 9, 1955, No. 32038/55. Class 69 (1). The rate of flow of a liquid, such as crude oil from an oil well, is measured by recording the rate of increase of pressure at the bottom of a vessel of constant horizontal cross-sectional area while the liquid is filling it, the vessel being intermittently emptied by a float-controlled discharge valve. As shown, the liquid enters vessel 1 continuously at 2 and leaves via conduit 4 under control of a valve 5 operated pneumatically by means of gas under pressure from the top of the vessel supplied through line 10 under control of a pilot valve 7. The valve 7 is arranged to open valve 5 when the level of liquid rises to 8<SP>1</SP> and close it when the level, falls to 8; it also supplies gas under pressure to a recorder 9 via line 12 to set moving a recording chart when the valve S is closed, this chart plotting the difference in pressure in lines 13 and 14 against time. The pressure of gas at the top of the vessel is controlled by means of a valve in gas outlet conduit 3. The rate of mass flow of liquid is calculated from the rate of increase of pressure shown on the chart, the crosssectional area of vessel 1 being known. The float 6 controlling pilot valve 7 may be replaced by level-sensitive means in a small cylindrical vessel alongside and communicating with vessel 1.