baber/WOPTO huggingface dataset:
Patent GB-814462-A (GB)
Title: A new biologically active 2-amino-4-hydroxy-6-substituted pteridine
IPC: C07D475/04
Filed: 1956-01-12
Abstract: The invention comprises 2-amino-4-hydroxy-6-dihydroxypropyl-pterin of the formula <FORM:0814462/IV (b)/1> and the preparation thereof (1) by stirring human urine with activated charcoal, collecting the charcoal, eluting said charcoal with an alkaline aqueous alcoholic solution, reducing the volume within the range of 30 to 2 per cent of the original volume, separating the watersoluble impurities by solvent countercurrent distribution in a water and water-immiscible alcohol system subjecting the required active substance to a series of partition chromatographic columns using water and waterimmiscible solvent systems until the major portion of the impurities is removed, chromatographically adsorbing the active substance on magnesium silicate, eluting with aqueous ammonia, concentrating the product to near dryness, extracting with dilute mineral acid, removing solid impurities, adjusting the pH to substantially 5 to 6 to precipitate the yellow product and recovering said product; and (2) by stirring human urine with activated charcoal, collecting the charcoal, eluting said charcoal with an alkaline-aqueous-alcohol solution, reducing this volume to about 30 to 2 per cent of the original volume, separating the watersoluble impurities by solvent countercurrent distribution in an aqueous salt solution and water-immiscible alcohol system, removing most of the salt by concentration and precipitation with methanol, concentrating to remove the methanol, further purifying the aqueous solution by chromatographic adsorption on activated charcoal, eluting the active substance with an alcohol-water-ammonium hydroxide mixture, subjecting the active substance to a series of partition chromatographic columns using water or aqueous salt solutionand water-immiscible solvent systems until the major portion of the impurities is removed, obtaining the product by concentrating to near dryness, extracting with dilute alkali and removing solid impurities, treating with dilute acid to about pH 2.0, separating solid impurities and adjusting the pH to substantially 5 to 6 to precipitate the yellow product, and recovering said product.  The partition chromatography step may be carried out with water and butanol or propanol.  The alcohol may be mixed with ethyl acetate.  Two detailed examples are given.  2 - Amino - 4 - hydroxy - pteridine - 6 - aldehyde is prepared by the acid periodate oxidation of the above 2-amino-4-hydroxy-6-dihydroxypropylpterin.  2 - Amino - 4 - hydroxy - pteridine - 6 - carboxylic acid is prepared by the permanganate oxidation of the above 2-amino-4-hydroxy-6-dihydroxypropylpterin.
Patent GB-620254-A (GB)
Title: A fastening device for connecting together the ends of wrist bands or cords of wristwatches
IPC: A44C5/20
Filed: 1947-01-13
Abstract: 620,254. Cord fasteners. NAPPER, A. F. Jan. 13, 1947, No. 1091. Addition to 612,600. [Class 44] [Also in Group VII] The fastening device of the parent Specification is modified to prevent accidental disengagement by the provision of a locking catch 16 slidably carried in the housing 2 provided with the uniting hook 11 and arranged to be moved to engage a transverse bar 9 on the other housing 1 when the hook is closed. The catch 16 is of channel section the lower limb 19 sliding on the floor 17 of the housing 2 and apertured at 20 to receive a pin 21 mounted to move with the hook 11. The size and disposition of the hole 20 are such that when the hook is closed the pin 21 moves the catch to a position where the hook 23 engages the bar 9 but when the hook 11 opens, the pin does not engage the catch. The catch can be slid back only by movement applied thereto by the wearer, e.g. by a finger nail. A spring may be associated with the catch to retain it in the locking position.
Patent GB-191613-A (GB)
Title: Improvements in rollers for wringers, typewriters and other machines
IPC: D06F45/00
Filed: 1922-01-13
Abstract: 191,613. Domoto, T. Jan. 13, I922. Paper-supports.- A platen roller has an intermediate layer d of cellular or sponge rubber the ends of this layer being left free to the atmosphere so that air may be discharged from, or received, by, the ends when in action. The central metal core a having end spindles b has a laver c of hard rubber vulcanized on it and the sponge-rubber layer d is covered by an outer layer c of fairly hard vulcanized rubber. Any number of layers may be, used.
Patent GB-541401-A (GB)
Title: Truck chassis for use with motor cycles
IPC: B60P3/42
Filed: 1940-01-18
Abstract: 541,401. Motor vehicles. BENELLI, G. Jan. 18, 1940, No. 1139. Convention date, Feb. 10, 1939. [Classes 79 (iii) and 79 (iv)] A truck frame adapted to be secured to a motorcycle frame from which the rear wheel has been removed comprises a frame 1 mounted by springs 2 on an axle casing 3 which is connected by a pair of radius rods 13 to the truck frame, the front end of the frame 1 having bars 5, 6 for securing to the motor-cycle frame (not shown). A double chainwheel 10, 11 is mounted on a pin 8 on the truck frame, 10 being connected by a chain to the motorcycle gear-box and 11 by a chain to differential gear in the casing 12 on the axle. The radius rods 13 are pivoted on the pin 8. The final drive chain is enclosed in a casing 15 mounted on the differential casing 12 and pivoted on the boss of the chain wheel 10,11.
Patent GB-110260-A (GB)
Title: Improvements in or relating to Filling Materials for Reaction, Concentration or Absorption Towers and the like.
Inventor: GOODWIN CAMILLO JOSEPH
IPC: B01J19/30
Filed: 1917-01-23
Abstract: 110,260. Goodwin, C. J. Jan. 23, 1917. Gases, treating with liquids. Relates to filling-materials for use in towers or columns for use in treating gases for washing, absorbing, &c. purposes. The filling- material consists of a number of tubular elements, each formed by joining two truncated cones as shown in Fig. 2. The junction may be rounded or formed with an annular projection 2. By this arrangement, the velocity of the gas passing through is constantly changed. The elements may be made of sheet metal, gauze, porcelain, hard rubber, &c. They may also be provided with corrugations and perforations. Reference is made in the Provisional Specification to Specifications 14774/96 and 4407/07.
Patent GB-906683-A (GB)
Title: Improvements in or relating to apparatus for coiling strip material
IPC: B21C47/06
Filed: 1961-01-11
Abstract: 906,683. Winding and reeling. UNITED ENGINEERING & FOUNDRY CO. Jan. 11, 1961 [Feb. 17, 1960], No. 1167/61. Class 83 (4). Apparatus for coiling strip material includes a frame and a mandrel on which strip is adapted to be coiled carried by said frame, said frame and mandrel being movable as a unit from a normal operating position to a remote position. Strip fed through a guide 13 is wound on an expandable mandrel 46 and pressed thereagainst by wrapper rolls 28 and 41. The mandrel 46 is mounted in bearings in a housing on a base 15 of a coiler main frame 14 and is rotated through suitable couplings by a motor 62 on a base 61. The wrapper rolls 28, 41 are carried by frame members 26, 38, pivoted at 31, 42 to the main frame 14 and connected by levers 25, 22 and 37, 34 to piston and cylinder assemblies 21, 33. The rolls 28, 41 are rotated through suitable shafts and couplings by motors 64 on the base 61. The bases 15 and 61 are connected by links 65 and are slidably mounted on bearing members 57. A piston rod 69 of a fixed cylinder 68 is connected to the base 61 to move the mandrel and wrapper rolls from a coiling position under driven conveyer rolls 74 to a position remote therefrom for servicing. The movement of the bases 15 and 61 is limited by stops 96 and the bases are locked in position by means 98, 105. Strip guides 93 adjustable to and from one another by motor-driven screws 94 are provided above the conveyer rolls 74. A wound coil is removed from the mandrel 46 by a stripper having rollers 87 which are lifted by piston and cylinder means 88 to support the coil. The stripper is moved away from the mandrel 46 on wheels 84 by piston and cylinder means 91 acting through beam 89.
Patent GB-174085-A (GB)
Title: Process and apparatus for cracking hydrocarbon oils, coal tar and the like
IPC: C10G9/42
Filed: 1922-01-14
Abstract: 174,085. Gulf Refining Co., (Assignees of Faragher, W. F., and Gruse, W. A.). Jan. 15, 1921, [Convention date]. Hydrocarbons, cracking; bulk evaporators. - In cracking hydrocarbon oils, lignite or coal tar, or tar oils in externally-heated stills, gas such as the gas formed during cracking, natural or casing head gas, or steam, is injected into the oil in such a way as to cause circulation of the oil over the heated surfaces and prevent or remove deposits of carbon. Sand, fine gravel, metal filings, &c. may be added to assist this action. The gas may be injected through a nozzle 11, Fig. 1, in a restricted portion of a trunk 8 supported in the still, which is heated by a furnace chamber 7. The oil circulates up the trunk 8 and down between the trunk and the walls of the still. Alternatively the gas may be injected through a perforated tube 11<a>, Fig. 2, into the annular space between the still walls and a wide trunk 8<a>. The oil, preheated by the residue from the still or otherwise is fed to the still so as to preserve a definite level. Gas for injection into the still may be drawn off by a pipe 30, or, if the pressure in the still is maintained in the condenser, from the outlet of the condenser. A number of stills through which the oil flows in succession may be used. The still may be an horizontal boiler having heated depending legs containing gas-operated circulating devices.
Patent GB-157383-A (GB)
Title: Improvements in electric gas-filled glow discharge lamps
IPC: H01J61/04
Filed: 1921-01-10
Abstract: 157,383. Lederer, A. Sept. 15,1913, [Convention date]. Vacuum tubes.-A lamp c contains a tube f through which a luminous discharge is passed between electrodes a, b, the inside of the tube being in communication with the outside to allow circulation of the gas for cooling. The electrodes may be flat so as to allow passage of gas at the sides, or they may be circular, or passages may be provided in the tube itself. Neon, helium, argon or other rare gas, or a mixture of these, may be employed. Specification 13567/04 is referred to.
Patent GB-511423-A (GB)
Title: An improved stair-carpet holder
IPC: A47G27/06
Filed: 1938-01-17
Abstract: 511,423. Friction-grips; stair-carpet holders. WEBB, G. V. Jan. 17, 1938, No. 1437. [Class 44] [Also in Group XIV] A stair-carpet holder comprises a part 1, secured to the stair by a bolt &c. through an aperture 4, carrying two arms 5 connected by a bar 6 which is engagable by a loop 8 on an attached portion 2, which pivots and slides with respect to the part 1, and the back of which is wedge-shaped. The base 3 of the part 1 is recessed at 7 further to grip the carpet. The parts 1, 2 may be modified for attachment to the angle between the upriser and tread of a stair.
Patent GB-268472-A (GB)
Title: Improvements in valve gear for internal combustion engines
IPC: F01L1/46
Filed: 1926-01-19
Abstract: 268,472. Bamford, J., and Bamford, C. J. Jan. 19, 1926. Valve gear.-The exhaust and inlet valves 10, 11 are actuated by a single cam 36 having a projection 40 which exerts a pull on the valve rod 25 to open the exhaust valve, and a depression 41 which allows a spring 37 to exert a push on the rod to open the inlet valve. A bell-crank 31 at one end of the rod engages the cam, and a crank arm 19 connected to the other end of the rod actuates a doublearmed lever 17, 18 contacting with the valves. This lever 17, 18 may be composed of leaf springs, or of rigid arms resiliently mounted between rubber blocks.
Patent GB-660091-A (GB)
Title: Method of and means for discriminating between electrical impulses
IPC: G01R29/027
Filed: 1939-01-16
Abstract: 660,091. Television. MURPHY RADIO, Ltd., DAVIES, K. S., and HAWKINS, G. F. Nov. 5, 1947 [Jan. 16, 1939], No. 1465/39. Class 40 (iii). [Also in Group XL (c)] A pulse width discriminator for separating out frame pulses from combined frame and line synchronizing pulses in a television receiver. comprises a valve normally biassed to cut-off but which is arranged to conduct when the frame pulses in the combined frame and line pulse train are applied to an input circuit of the valve coincidently with shock-excited voltage pulses produced in an oscillatory circuit by the combined pulse train. As shown in Figs. 1 and 2, the combined pulse train comprising line synchronizing pulses a and frame synchronizing pulses b is applied to a grid-cathode circuit of valve 2 both grids of which are negatively biassed to ensure anode current cut-off by means of a battery 6. An oscillatory circuit 5 having a half-period of oscillation equal approximately to the duration of a line synchronizing pulse is shock excited by each pulse in the combined pulse train and supplies damped oscillatory voltage wavetrains d, e, g, k, &c. to a second grid-cathode circuit of valve 2, the arrangement being such that the valve is caused to conduct and therefore to supply signals at frame frequency only when an oscillatory half-wave voltage pulse such as q occurs coincidently with a frame synchronizing pulse b, the addition of the two pulses in this case being sufficient to overcome the fixed bias supplied by the battery 6. In a modification, Fig. 3 (not shown), a triode valve is used and the combined pulse train is applied to the control grid and the oscillatory circuit is connected in the cathode circuit of the valve. In a further modification, Fig. 4 (not shown), a tetrode valve is employed and the arrangement is similar to that of Fig. 2 except that the oscillatory circuit is coupled to the input terminals by means of an auto-transformer. It is stated that the valve employed may be the gas-discharge valve of the frame scanning generator.
Patent GB-504852-A (GB)
Title: Apparatus for promoting correct breathing
IPC: A63B23/18
Filed: 1938-01-17
Abstract: 504,852. Breathing-training apparatus. UCHIUMI, Y. Jan. 17, 1938, No. 1500. [Class 81 (ii)] Apparatus for promot-, ing correct breatning comprises a frame, for example of springy metal in the form of a flattened cylindrical shell, which is strapped to the abdomen to cause the inner and outer sides 1, 2, to move toward and away from one another during breathing. The side 1 carries a gong 3 and the side 2 a hammer 6 on a stem 5, which hammer co-operates with a finger 4 to strike the gong at each breath.
Patent GB-1141944-A (GB)
Title: Photoconductors
IPC: H01J29/45
Filed: 1967-01-11
Abstract: 1,141,944. Photo-conductors; image pick-up tubes. TOKYO SHIBAURA ELECTRIC CO. Ltd. 11 Jan., 1967 [11 Jan., 1966; 12 Jan., 1966; 27 April, 1966], No. 1530/67. Headings H1D and H1K. A photo-conducting material comprising cadmium sulphide, selenide or telluride or a solid solution of these materials, and containing a first impurity comprising a compound of at least one of copper, silver or gold, and a second impurity comprising at least one of thallium, tin, lead, antimony or bismuth is prepared and heat treated at 450-950‹ C. in an atmosphere of sulphur, selenium or tellurium. The two types of trapping centre produce a stable and reproducible photo-conductive response and the heat treatment removes surface oxygen. Particular examples includes 0À2% by weight of copper in the form of copper chloride, and 0À5% by weight of thallium, in cadmium selenide. Cadmium chloride is added as a flux together with water, and the mixture is coated on to a glass substrate, dried and fired at 600‹ C. in an inert atmosphere of argon or nitrogen. Indium electrodes are then deposited on the layer. A second example comprises silver chloride and lead in a 15%/85% by weight solid solution of cadmium sulphide and cadmium selenide, the mixture being sprayed on to a glass plate prior to firing. The material may also be formed by vapour deposition or sputtering, and the impurities may be vapour deposited as layers, and subsequently diffused in by heat. An application to an image pick-up tube is described, in which a transparent electrode is deposited on to the inner face of a transparent end plate of the tube, and a 0À1-10Á thick photo-conducting layer of cadmium selenide containing 20% cadmium chloride flux, 0À1% copper in copper chloride and 1% thallium is vacuum deposited on to the electrode. The layer is then sintered in an inert atmosphere and subjected to selenium vapour at 500‹ C. A porous film of antimony bisulphide may be deposited on to the photo-conducting layer to prevent the secondary emission of electrons when the scanning electrons within the vidicon tube strike the surface of the layer. A prior art method of producing a photoconductor is described in which cadmium selenide, 10% by weight of cadmium chloride and 0À001% by weight of copper in copper chloride are vapour deposited together on to a quartz glass plate, and fired at 500‹ C. in a nitrogen atmosphere. Indium electrodes are then applied.
Patent GB-574297-A (GB)
Title: Improvements in or relating to axle bearings for electrically driven rail vehicles
IPC: B61F15/28
Filed: 1944-01-27
Abstract: 574,297. Electric collectors. HOFFMANN MANUFACTURING CO., Ltd., and SMITH, C.H. Jan. 27, 1944, No. 1558. [Class 38 (i)] In a roller bearing for electrically driven rail vehicles a pad f dealing with end thrust is of electrically conducting material and connected by a flexible conductor h to the axle box housing or frame of the vehicle. In the construction shown, the pad f is maintained in contact with the end of the axle a by means of springs g, a lubricating pad j being held in wiping contact with the end of the axle by a light spring k.
Patent GB-415322-A (GB)
Title: Improvements in pistons and cylinders for internal combustion engines
IPC: F16J9/00
Filed: 1934-01-17
Abstract: 415,322. Pistons and cylinders. CROSS, R. C., 33, Midford Road, Odd Down, Bath. Jan. 17, 1934, No. 1686. [Class 122 (i).] Pistons made of aluminium, aluminium alloy or other light metal working in cylinders constructed with similar metals are provided with piston rings c of nitrided steel or iron or similar hard metal having a greater radial thickness than the radial depth of the grooves b in which they work. The construction avoids the use of steel liners for the cylinder.
Patent GB-706850-A (GB)
Title: Improvements in or relating to ink stands
Inventor: MARTIN LYNN PHILIP
IPC: B43L25/00
Filed: 1951-01-23
Abstract: 706,850. Ink stands. SHEAFFER PEN CO., W. A. Jan. 23,1951, No. 1711/51. Class 146(3) A reservoir ink stand comprises a reservoir and an overflow chamber containing ink over-flowing from the reservoir, a well disposed in the chamber for receiving the point of a pen through an opening in the upper wall of the chamber, a feed passageway extending laterally through the chamber and connecting the well and the reservoir, and capillary fissures communicating between the chamber and either or both the well and the reservoir for permitting the return of the overflowing ink to the reservoir. The stand 15, Fig. 3, comprises an upper portion 20 fitting over a lower portion 21 to provide a reservoir 26 and an overflow chamber 27 separated by a wall 25 having a groove 29 accommodating a tongue 28 on the portion 21 providing an uink-tight seal. A well 30, Figs. 6 and 9, within the chamber 27, communicates with the reservoir 26 through feed passageways 31, 32, 33 and 34. A chamber 38 within the passageway 32 has a depending member 37 which closes an opening 57 when the ink level reaches its' lower edge, thus closing the path of air to the reservoir from an opening 39. As ink from the.well 30 is used the level of ink therein falls, and any ink in the chamber 38 replaces the ink used until the level of ink in the chamber 38 drops sufficiently to admit air to the reservoir 26, thus permitting a corresponding volume of ink to flow from the reservoir to the chamber 38. A fissure 60 of capillary size in the well 30 and a fissure 65 of similar size beneath the wall 25 provide a capillary connection between the reservoir 26 and the chamber 27, these fissures being normally sealed with ink to prevent the flow of ink from the reservoir 26. Ink displaced from the reservoir 26, due to expansion of air within the reservoir 26, flows to the well 30 and overflows into the chamber 27; similarly contraction of the same air will cause ink to return to the reservoir 26 through the fissures 60 and 65. Since any air to replace ink flowing from the reservoir due to the reservoir being tilted must either flow downwardly, when resting on the end wall 17, Fig. 3, or transversely, when resting on the side wall 18, in the feed passageways to reach the reservoir the inkstand may be thus tilted without spilling ink apart from that in the well 30. When the stand is tipped so as to rest on the end wall 19, the level of ink in the reservoir falls below the entrance to the passageway 31, thus preventing any ink overflowing from the partially filled reservoir; however, if the reservoir is full, spilling of ink is prevented when the stand rests on the wall 19, since the passageway 34 and opening 39 are at the same level, consequently there is no tendency for air to flow into the feed passageways.
Patent GB-1026948-A (GB)
Title: Improvements in or relating to unidirectional roller-type clutches
IPC: F02N15/04
Filed: 1965-01-14
Abstract: 1,026,948. Roller clutches. SOC. ANON.; D.B.A. Jan. 14, 1965 [Jan. 16, 1964], No. 1728/65. Heading F2C. [Also in Division F1] In a one-way clutch an annular member 58, Fig. 4 (not shown) having lugs 62 has profiled parts 60 to fit into recesses defining the cams 48 in an outer ring 24, springs 54 acting between the lugs 62 and rollers 52 to press the rollers into a wedging position between an inner ring 40 and ring 24. Before assembly of the clutch, the lugs 62 make an angle greater than 90 degrees with the plane of member 58 so that on assembly the lugs press tightly against shoulder 50 to hold the member firmly between shoulders 46, 50 of outer ring 24.
Patent GB-1367206-A (GB)
Title: Method of drying and demercurizing hydrogen
IPC: B01D53/64
Filed: 1972-01-14
Abstract: 1367206 Cooling gases by direct contact with liquids BADISCHE ANILIN- & SODAFABRIK AG 14 Jan 1972 [15 Jan 1971] 1786/72 Heading F4K In a method of drying and demercurizing hydrogen obtained from the electrolysis of alkali metal chlorides by the amalgam process, the hydrogen is passed upwardly through a packed washing tower 4 in which it is washed with a cold aqueous solution of alkali metal hydroxide having a temperature below 0‹ C. Preferably the aqueous solution is of caustic soda or caustic potash. The thus purified hydrogen then passes through a line 6 into a heat exchanger 2 where it serves to precool impure hydrogen from the electrolysis plant before being finally removed via a line 7. Separated mercury is removed from the tower 4 via a line 12. To maintain the concentration of the circulated caustic solution entering the tower via line 5 at a desired level, fresh concentrated solution may be added through a line 9, excess dilute solution being removed through a line 10. The circulated solution is recooled in an evaporator 11.
Patent GB-178412-A (GB)
Title: Improvements in and relating to apparatus for heating or vaporizing fluids
IPC: F24H1/00
Filed: 1922-01-20
Abstract: 178,412. Metzger, C., and Luetschen, E. April 13, 1921, [Convention date]. Instantaneous generators.-Water or other liquid is forced downwardly through a coil 4. Fig. 1, terminating in a nozzle 5, Fig. 2, and impinges upon a surface 2 highly heated by an oxy-hydrogen or other blow-pipe flame. The vapour generated passes at high velocity through constrictions 8 and is led bv tubes 6 into a collecting chamber 7. The burner is surrounded by a refractory mass 9. Air or oxygen for combustion is heated in a coiled tube around the burner.