baber/WOPTO huggingface dataset:
Patent GB-953943-A (GB)
Title: Improvements in or relating to the production of hydrogen fluoride
IPC: C01B7/19
Filed: 1962-02-02
Abstract: Hydrogen fluoride is produced by reacting together an alkali metal fluoride e.g. Na For KF, and ammonium bifluoride to give an alkali metal bifluoride and heating the alkali metal bifluoride e.g. to 300-450 DEG C.  Thus alkali metal fluoride and ammonium bifluoride may be stirred together in aqueous solution at 20-30 DEG C., for 90-150 mins., the solid alkali metal bifluoride removed e.g. by filtering and the residual solution further evaporated, cooled and stirred for a further 90-150 mins at 20-30 DEG C., after which further alkali metal bifluoride is removed. The alkali metal fluoride obtained from heating the bifluoride may be recycled.  The ammonium fluoride obtained by reaction of ammonium bifluoride is heated e.g. at 170 DEG C., for 2 hrs, to give NH3 and ammonium bifluoride.  The bifluoride is recycled and the NH3 used to react with fluorosilicic acid to form SiO2 and ammonium fluoride.  Fluorosilicic acid may be obtained by absorption of den gases from the sulphuric acid treatment of phosphate rock. The ammonium fluoride from this process may be recycled.
Patent GB-136387-A (GB)
Title: Improvements in Changeable Sign-boards or the like.
Inventor: CONRIDGE HARRY JAMES
IPC: G09F7/08
Filed: 1919-02-20
Abstract: 136,387. Conridge, H. J. Feb. 20, 1919. Grant of Patent refused. Signs, supporting.-A changeable letter sign has metal slats A independently secured in a frame B. The tup edge a<1> of each slat is turned backwards and downwards, and the bottom edge a<2> may be turned backwards and upwards, the lettex tabs C being formed with top, or with top and bottom, flanges to fit the turned-back edges a', a<2>. When the tabs have both top and bottom flanges, gaps A<2> are provided at each end of the bottom edge of the slats A to facilitate insertion of the tabs.
Patent GB-206431-A (GB)
Title: Improvements in and relating to stoppers for bottles and other containers
IPC: B43L25/00
Filed: 1923-02-13
Abstract: 206,431. Davis, M. D. Feb. 13, 1923. Inkstands.-In ink bottles &c. or the kind comprising a main container or reservoir and a supplementary reservoir, which when the bottle is stoppered and tilted, is filled from the main container, the supplementary reservoir f is formed in a hollow stopper c contained substantially wholly within the neck b of the bottle above the, level of the ink in the container and' formed with one or more passages m leading from the bottom towards the top, where they open into the hollow interior of the stopper. The stopper c may be formed of vulcanite &c. and may have a cork or other liner d. The reservoir f serves as a dipping-well and is adapted for the filling of self-filling pens. The passages n may be formed by flutes, grooves, or flats formed on the surface of the stopper, or partly thereon and partly on the interior surface of the bottle neck or the liner d. and communicating with openings to the reservoir f. A screw-cap h, with an integral or a separate cork plug part k and a groove. e containing a cork or other washer m, is provided to fit on a stepped part e of the stopper c, or a screw-plug may be used. A separate tube reaching to the bottom of the main container may be provided for venting the reservoir f during filling from the container.
Patent GB-708920-A (GB)
Title: Improvements in lifting jacks
IPC: B66F13/00
Filed: 1951-02-21
Abstract: 708,920. Lifting jacks. METALLIFACTURE, Ltd., and PICKERELL, A. W. March 10, 1952 [Feb. 21, 1951], No. 4254/51. Class 78 (3) A lifting jack comprises a bipod support structure having downwardly diverging legs, a shank supported from the apex of the bipod, a lifting dog associated with the shank, means for causing vertical displacement of the lifting dog, and means to permit the shank and lifting dog to swing transversely to the plane of the bipod. As shown in Fig. 1 a bearing member 6 on a screw 7 is supported on a part spherical seat member 5, welded to the top of bipod legs 1, and the screw is rotatable by a handle 10 and ratchet gearing in the head 8. For rapid adjustment the ratchet gearing may be immobilized by movement of the pawl reversing arm 12, and the screw may be rotated by means of a knurled knob 13. According to a modification, this operating mechanism is located at the bottom end of screw 7. The crutch comprises a nut 14 and a pivoted bar 17 adapted to engage a socket on the load. In a modification (not shown) a ratchet bar, having a ball and socket connection with the member 5, has a crutch movable therealong by interaction of a pair of pawls which are pivoted to the crutch and are operated by a manually operable lever, to produce up or down crutch movement. In a further modification a pawl mechanism secured to the member 5 moves a ratchet bar, carrying the crutch, up and down.
Patent GB-433459-A (GB)
Title: Improved cooling systems for rotary or reciprocating compressors, exhausters, pumps or engines
IPC: F04C29/04
Filed: 1934-02-09
Abstract: 433,459. Cooling cylinders. NICHOLS, T. W., 63, Capel Road, Forest Gate, London. Feb. 9, 1934, Nos. 4300 and 6716. [Class 7 (ii)] [See also Groups XXVI and XXVIII] Compressed air issues from an injector j<3> and entrains air from the atmosphere which passes through an inlet h3 to a cooling jacket s<2>.
Patent GB-1430491-A (GB)
Title: Heat exchangers
IPC: F28F3/08
Filed: 1974-01-30
Abstract: 1430491 Plate heat exchangers CHAFFOTEAUX ET MAURY 30 Jan 1974 [2 Feb 1973] 04376/74 Heading F4S In a heat exchanger comprising a stack of peripherally flanged circular plates 1 nested one within the other to define two series of flow spaces 9 therebetween for first and second heat exchange fluids, e.g. hot water from a central heating boiler and cold water to be heated for supply to hot water taps, each plate 1 has two openings 10 and 11 of different diameters each surrounded by a respective collar 12 and 13. The collar 12 surrounding the smaller opening 10 projects from the opposite surface of the plate to that surrounding the larger opening 11, and the plates of the stack are angularly displaced in stepwise fashion by 90 degrees. The difference in the diameters of the two collars is such that the smaller collar of one plate fits inside the larger collar of the facing adjacent plate of the stack so as to define transfer passages, e.g. 21, 22, for leading fluid from one space to the next in the series. The flanged rim 3 of each plate has a stepped configuration, and the plates are joined together in fluid-tight manner by means of brazing material 15, 16. Each plate is provided with a number of ribs or bosses 8 serving to impart turbulence to the heat exchange fluids as they flow through the spaces 9. The ends of the stack are connected to hemispherical domes 17 and 18.
Patent GB-386143-A (GB)
Title: Improvements in and relating to photo-electric cells
IPC: H01L21/16
Filed: 1932-02-15
Abstract: 386,143. Light-sensitive. cells. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A. -(Assignees of Allgemeine Elektricitõts Ges. ; 2, Friedrich Karl-Ufer, Berlin.) Feb. 15, 1932, No. 4452. Convention date, Feb. 13, 1931. [Class 40 (iii).] A photo-electric cell comprises cuprous iodide formed between a metallic electrode member, which may be of copper, and a thin translucent metallic layer constituting the second-electrode. The cuprous iodide may be applied to the supporting electrode member by pressure or, by fusing.
Patent GB-1383999-A (GB)
Title: Manufacture of concretes and mortars
IPC: B28C5/00
Filed: 1972-01-31
Abstract: 1383999 Making concrete or mortar A TARDIEU 31 Jan 1972 [15 Feb 1971 20 Dec 1971] 4525/72 Heading C1H A pasty mixture of a binder, aggregate and water is subjected, prior to hydration of the binder, to a freezing operation and then to a thawing operation to reconvert the mixture to a pasty state. The binder may be cement, lime or a mixture thereof. The aggregate may be sand, gravel, expanded clay, pozzolana, expanded polystyrene, glass or slag. In tests a mixture of sand, cement and water (sometimes with gravel) was frozen at - 18 C. for 5 hours, the freezing taking place at various times, up to 60 minutes, after mixing.
Patent GB-1512893-A (GB)
Title: Inside scaffolding for large metallic structures
IPC: E04H7/14
Filed: 1976-02-05
Abstract: 1512893 Folding scaffold GENERAL DYNAMICS CORP 5 Feb 1976 [14 Feb 1975] 04540/76 Heading E1S A scaffold tower for use in constructing a large hollow metallic structure 10 comprises a central body portion made up of sections, e.g. 2, 3, 6, 7, and radially outwardly extending gangways, e.g. 4, 5 which are hinged to collapse against the body portion so that the tower can be removedthrough a hole left in the structure 10, which is constructed of sections welded together from the interior. The gangways may have two sections, hinged together, and supported by stays. Alternate sections e.g. 3 and 7 may carry the gangways, so that there are levels at which the gangways exist. The tower may have an elevator.
Patent GB-608000-A (GB)
Title: Improvements in or relating to kites
IPC: B64C31/06
Filed: 1946-02-13
Abstract: 608,000. Kites. DICKSON, S. D. Feb. 13, 1946, No. 4549. [Class 4] A kite, which may be of the type controlled by two flying strings as described in Specification 596,046, is provided with a carrier arranged for the automatic release of an article, such as a dummy bomb or figure, when the kite assumes a predetermined altitude. In the form shown in Fig. 1, two dummy bombs 17 are carried at the ends of diverging arms 14, from which they may be released separately -or simultaneously by manipulating the kite into a banked or diving attitude. Fig. 2 shows a dummy figure 26 with a parachute 25 carried in a inverted tube 21, from which they are dropped when the kite dives.
Patent GB-127792-A (GB)
Title: An Improved Surgical Sand-bag.
Inventor: BANKS KATHERINE ROSA
IPC: A61H37/00
Filed: 1919-02-24
Abstract: 127,792. Banks, K. R. Feb. 24, 1919. Fractured limbs, supports for; supports for parts under operation; massage.-A sand-bag for giving support in cases of fracture, or during surgical or massage treatment, consists of an inner linen bag covered with a loose or adherent envelope of seamless rubber and partly filled with silver sand.
Patent GB-118856-A (GB)
Title: An Improved Liquid Fuel Spraying Apparatus for Internal Combustion Engines.
Inventor: STOCK WILLIAM GEORGE
IPC: F02M67/12
Filed: 1917-09-12
Abstract: 118,856. Stock, W. G., and Chandler, R. Sept. 12, 1917. Cylinders receiving liquid fuel.-A cone A with helical grooves E in its surface fits a conical recess in the flameplate B, which terminates in a whirl chamber H and outlet orifice F. The guide L for the valve M, Fig. 5, may be similarly grooved.
Patent GB-700492-A (GB)
Title: Devices for testing the hardness of metals
IPC: G01N3/42
Filed: 1952-02-21
Abstract: 700,492. Testing hardness. ERNST, A. Feb. 21, 1952, No. 4643/52. Addition to 664,876. Class 106 (2) In the hardness-testing device of the parent Specification, in which pressure is applied manually, through resilient means 56, to a plunger 12 in which is mounted an indentor 15 co-operating with a diaphragm 50 forming part of indicating means, shock-absorbing means are arranged between the indentor and the indicating means and/or the indentor is loosely mounted in the plunger and is aligned by co-operating conical surfaces on the indentor and plunger. The indentor 15 has a conical shoulder 26 which is urged by a spring 16 against a conical face in a ring 28 press-fitted into the plunger 12. Adjustably secured in the ring 28 is an inner ring 25, the lower surface of which has a flat central portion beyond which it is bevelled upwardly. The indentor bears on the diaphragm 50 through a spring-loaded ball 20 which acts to absorb shocks when the apparatus is applied violently to the test surface.
Patent GB-693431-A (GB)
Title: Improvements in or relating to weighing apparatus
Inventor: JEFFERSON SIDNEY
IPC: G01G1/00
Filed: 1950-02-23
Abstract: 693,431. Weighing-apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 2, 1951 [Feb. 23, 1950], No. 4709/50. Class 143 [Also in Group XL(b)] In a weighing apparatus used for check weighing, the resultant moment produced on a beam 1 by a fixed counterweight 2 and the load in a scale pan 3 is counterbalanced by linear extension of one of a pair of permanently twisted strips 4, 5; and the over or under weight of the load is measured by rotation of a mirror 7 secured to the strip 4 and reflecting a beam of light from a collimator 8 onto a graduated scale 9. Each strip is twisted in opposite directions above and below its centre point, and is attached to the other spring at X; the outer ends of the springs being anchored at Y and Z. A dash pot 10 is provided to produce substantially dead beat movement of the beam. The fulcrum 15 may comprise either a knife edge or a crossed leaf spring pivot. In a modification the light beam reflected by mirror 7 actuates a photo-electric control for sorting articles.
Patent GB-1115393-A (GB)
Title: Improvements in or relating to evaporators
IPC: B01D3/06
Filed: 1966-02-03
Abstract: 1,115,393. Evaporators, multi-stage flash type; desalination of water. R. S. SILVER. 11 Jan., 1967 [3 Feb., 1966], No. 4730/66. Heading B1B. In a multi-stage flash evaporator of the type wherein the feed liquid, e.g. saline water, is preheated, in tubular heaters traversing the vapour spaces of the flash chambers, by heat-exchange with the flashed vapours, the feed liquid 10 is divided into two streams 10<SP>1</SP>, 10<SP>2</SP> each of which flows in sequence through the heaters in alternate stages of the evaporator before being introduced, via heat input section 12 and connection 13, into the first flash chamber. The length of the tubes of each heater may be longer than those in conventional (single stream) evaporators of this type, but the number of tubes required in each stage is less. The feed liquid may be divided into more than two streams, e.g. it may be divided into three streams each of which by-passes the heaters in two stages instead of one stage as in the case of two streams.
Patent GB-1152295-A (GB)
Title: Improvements in or relating to Switched-Voltage Regulated DC Voltage Supply Arrangements
IPC: H02M3/156
Filed: 1968-01-30
Abstract: 1,152,295. Automatic voltage control. MARCONI CO. Ltd. Jan.30, 1968 [Feb.9, 1967], No.4744/68. Heading G3R. A D.C. voltage regulator comprises a transformer 5 having its primary winding 4 connnected by way of an electronic switch 6, e.g. a transistor, and a primary current sensor 14 to a D.C. supply source 1; a capacitor 9 which is connected across the output terminals 10, 11 of the regulator and which is also connected over a rectifier 8 and a secondary current sensor 15 to the secondary winding 7 of the transformer 5; a sensor 16 responsive to the D.C. output voltage; and on OR gate 13 or equivalent circuitry having its output connected to control the switch 6 and having respective inputs derived from the sensors 14, 15 and 16. In operation, when a voltage first appears across the input terminals 2, 3 the transistor 6 is rendered conductive and current builds up in the primary winding 4 until a predetermined current level is reached, at which value the sensor 14 produces a signal to switch off the transistor; the voltage across secondary winding 7 then rises rapidly and capcitor 9 is charged by the resulting current flow, the secondary current sensor 15 producing a signal to hold transistor 6 "off" all the time secondary current is flowing; when transfer of energy between windings 4 and 7 is complete, transistor 6 will then again conduct, and the cycle will be repeated until the voltage across capacitor 9 reaches a predetermined value, at which point the sensor 16 will produce a signal to render transistor 6 non-conductive. The regulator has an inherent short-circuit protection characteristic, and is able to accept input voltages that are appreciably larger or smaller than the regulated output voltage. The sensors 14, 15, 16 may include transistors Fig.2 (not shown) and the sensor 15 may be constituted by a tertiary winding on the transformer 5 Fig. 3 (not shown)
Patent GB-305974-A (GB)
Title: Process for the adsorption of gases in liquid gas apparatus
IPC: B01D53/04
Filed: 1927-11-23
Abstract: 305,974. Ge,s. fur Industriegasverwertung. Nov. 24, 1926, [Convention date]. Divided on 281,305. Revaporizing liquefied gases.-In the preparation of compressed gases from the liquid, gases such as those evolved when not required for use are absorbed by gels cooled to the boiling point of the gas, e.g. by the cold of evaporation. The gels may also be cooled in a space to be evacuated. The adsorbed gas is recovered by subsequently heating the gel under the same or a higher pressure.
Patent GB-419802-A (GB)
Title: Improvements in indicating plates
IPC: B60R13/10
Filed: 1933-02-16
Abstract: 419,802. Signs. BERLOU, I. R., 5, Rue Felle Flourens, Beziers, Herault, France. Feb. 16, 1933, No. 4772. Void [Abridged as open to inspection under Sect. 91 of the Acts, Oct. 23, 1933]. [Class 3 (ii).] A number plate comprises coloured plates or layers 1, 2 of plastic material, the front layer 1, out of which the letters &c. 3 are cut, being opaque and the layer 2 translucent or opalescent to permit of rear illumination of the letters at night. The layer 1 may comprise cellulosic paint. A transparent plate may be provided on the front of the layer 1 to protect the apertures therein or on the rear of the layer 2 to strengthen the number plate.
Patent GB-1180016-A (GB)
Title: Method and Apparatus for Improving Moisture Gauge Response.
Inventor: BIDDLE DONALD EVERETT
IPC: G01N27/22
Filed: 1967-02-01
Abstract: 1,180,016. Electro-physical measurementmoisture. INDUSTRIAL NUCLEONICS CORP. Feb.1, 1967[Feb.4, 1966], No.4850/67. Heading G1N. A capacitative probe for determining moisture in paper, comprises a number of electrodes which can be selectively connected in parallel for measuring average moisture content, or disconnected to provide a narrow sampling area for emphasizing the response to moisture streaks. The output of the measuring circuit is connected to a chart recorder having its pen driven in synchronism with the movements of probe across the sheet. The capacitor elements may be selectively connected by a switch or a number of printed circuit connection boards. Alternatively Fig. 6, the probe head may have four electrode pairs A for measuring average moisture and a single pair B for detecting narrow streaks of moisture in the transverse or longitudinal direction of the sheet by rotating the probe head.
Patent GB-822154-A (GB)
Title: Fermentation process for the production of d-arabitol
Inventor: LAVIN OWEN
IPC: C12P7/18
Filed: 1957-02-13
Abstract: Glycerol is prepared by fermenting a suitable nutrient medium under submerged and aerated conditions with a d-arabitol-producing strain of Saccharomyces rouxii or Saccaromyces mellis, the nutrient medium containing high-test cane molasses as the major source of assimilable carbon and also a further source of nitrogen such as urea, e.g. 0.05-0.1% w/v.  It is preferred to add a further small proportion of an organic nitrogen source such as corn-steep liquor or yeast extract, e.g. 0.3-1.5% w/v.  Invertase may also be added, e.g. about 0.02 to 0.3% w/v.  Preferred total sugar concentration in the medium is about 15-25% w/v. Fermentation temperatures of about 30-37 DEG  C. are suitable.  The glycerine may be recovered by steam-distillation from the d-arabitol-containing ferment.ALSO:D-arabitol is prepared by fermenting under submerged and aerated conditions, a suitable nutrient medium with a d-arabitol-producing strain of Saccharomyces rouxii or Saccharomyces mellis wherein the nutrient medium contains high test cane molasses as the major source of assimilable carbon and also a further source of simple nitrogen such as urea, e.g. 0.05-0.1% w/v.  It is preferred to add a further small proportion of an organic nitrogen source such as corn steep liquor or yeast extract, e.g. 0.3-1.5% w/v.  Invertase may also be added, e.g. about 0.02 to 0.03% v/v.  Preferred total sugar concentration in the medium is about 15-25% w/v.  Fermentation temperatures of about 30-37 DEG  C. are suitable.  The d-arabitol may be recovered by extraction with a lower aliphatic alcohol after concentration.
Patent GB-538894-A (GB)
Title: Improvements in or relating to electric circuit interrupters having arc-extinguishing devices
IPC: H01H33/76
Filed: 1940-03-15
Abstract: 538,894. Arc-rupturing in switches. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. March 15, 1940, No. 4865. Convention date, March 22, 1939. [Class 38 (v)] An arc-quenching structure comprises a series of refractory insulating plates 75 slotted at 79, the slots in adjacent plates being staggered. The spacing members 77 between them consist of hard fibres or other gas-evolving material and are so shaped as to provide a constricted part, Fig. 3, at an intermediate point in the length of the slots. At each end of the stack of plates 75 is a shield plate 71 of refractory insulating material having a slot 73, Fig. 3, which is considerably less deep than the slots 79, the plates 71 being spaced from arcing plates 55, 63, which in turn are spaced from insulating end plates 31, 33 and are slotted at 89 to allow of gas-escape in advance of the arc and provided with a plate 87 of arc-resistant metal such as a tungsten-silver alloy. Below the limbs of the plates 75 extend refractory members 85 having inclined surfaces extending on either side of the fixed and movable arcing contacts 21, 23 to form a continuation of slots 79. In operation, the arc is transferred from contacts 21, 23 on to the plates 55, 63 and driven by a magnetic blowout into the slots. While the middle part of the arc continues its upward movement to the ends of slots 79, the end portions are impeded, due to the shorter slots 73, but the arc-tips continue moving up the plates 55, 63 until the arc restrikes at points closer to the ends of slots 73. This process occurs rapidly and minimizes the vaporization of plates 55, 63. The blast of unionized gas produced by the magnetic field is supplemented by the gas produced by members 77, flow of generated gas being assisted by the increasing cross section of the spaces between the plates 75. The side-walls 35 of the structure are recessed to enable the structure to fit within, and rest upon, the laminated blow-out poles 39, which are screwed to a non-magnetic bracket 41 on an insulator 43 and interconnected by a core 45 carrying the blow-out coil 47. One coilend 49 is connected to a main fixed-contact carrier 13, whereas the other is connected to a fixed blade contact 51 from which a pair of blades 59 on the plate 55 can be disengaged to allow the quenching-structure to be bodily slid off the poles.
Patent GB-903352-A (GB)
Title: Alkyne compound and methods for the production thereof
Inventor: CAVALLA JOHN FREDERICK
Filed: 1961-02-09
Abstract: The invention comprises 1-propargyl-2-methyl-3-phenyl-3-propionyloxypyrrolidine, its acid-addition salts, and preparation thereof by reaction of 2-methyl-3-phenyl-3-propionyloxypyrrolidine with a propargyl halide, the product obtained being converted into the free base or into an acid-addition salt thereof as desired.