baber/WOPTO huggingface dataset:
Patent GB-1039791-A (GB)
Title: Improvements in or relating to toughened glass windscreens
IPC: B60J1/02
Filed: 1963-05-24
Abstract: A toughened glass windscreen having a zone which gives coarse and fine fragments on shattering includes parts which have been toughened to produce a normal fine fragmentation when shattered, these parts including strips extending continuously along the upper and lower edges of the screen and bands extending at right angles to and from one of the strips to the other, and parts which have been less toughened, these parts including bands alternating with the normally toughened bands.  In a process for manufacturing such windscreens a plane or curved glass windscreen is disposed between opposed blower chests 8, 81 (Fig. 4, not shown) having blower surfaces 13, 131 which are interrupted in a central zone wherein perforated plates 14, 141 carrying blowing nozzles 15, 151 are fitted.  The nozzles 15, 151 are arranged in vertical columns the distance between which is twice the distance between nozzles in each column, see Fig. 7 (not shown) and air under pressure is fed thereto independently of the rest of the blowing chest.  The blower chests are mounted so that they may be vertically oscillated.  The nozzles are so mounted on plates 14, 141 that they may be adjusted by screw threads to the correct distance from the glass sheet.  Alternatively the carrier plates 14, 141 may be mounted on slide rods 20 (Fig. 8, not shown) and held away from the glass sheet 11 by springs 21, the tension of which is so regulated that when air is admitted to the chest the carrier plates are pushed a predetermined distance which leaves the nozzles the desired distance from the sheet.  Alternatively the sheet may be oscillated instead of the nozzles or both the sheet and the nozzles may be oscillated.  It is preferable that at some final stage of the chilling there is no relative motion between the nozzles and the sheet.
Patent GB-310720-A (GB)
Title: Improvements in or relating to transmission mechanisms for machine tools
IPC: B23F23/00
Filed: 1928-07-19
Abstract: 310,720. Moss Gear Co., Ltd., and Gregory, E. July 19, 1928. Driving machines.-A reversing-mechanism for gear-cutting and other machines is automatically controlled by the driven shaft. A shaft 3 drives a shaft 24 either directly through gears 25 or reversely through bevel gears 6 shaft 9 spur gearing 12, change speed gearing 15<a> shaft 16 bevel gearing 18 and spur gears 23. The gears on the driven shaft are connectable to it through a splined dog clutch 27 shifted by a yoke 29 operated by a link 31 from a lever 33, lost motion being provided at 32. The lever 33 is thrown by dogs 39 on a worm wheel 43 driven by a worm on the shaft 24. A V-ended arm 35<a> of the lever 33 ensures complete throw over by engaging a spring bolt 36 constituting a load-andfire device. The gearing may be locked in neutral by a bolt 37 engaging a notch in a collar 33<a>.
Patent GB-473790-A (GB)
Title: Improvements in systems for determining the position of aircraft
Filed: 1936-07-29
Abstract: 473,790. Determining position of aircraft. SPERRY GYROSCOPE CO., Inc. July 29, 1936, No. 21001. Convention date, July 30, 1935. [Class 97 (i)] Apparatus for finding the position of aircraft and for directing fire control comprises two observing instruments, the elevation and azimuth movements of which are transmitted to light projectors, the positions of which represent, to a reduced scale, those of the observing instruments. The beams from the projectors are received on a screen which can be adjusted vertically until the beams intersect in its plane, the height of the screen then representing to scale the altitude of the aircraft. A third projector is provided, the position of which represents to scale that of a fire control director &c., this projector being angularly adjusted until its beam meets the screen at the point of intersection of the beams of the other two projectors. The angular movements of the third projector and the vertical movements of the screen, are transmitted to guns, fire control directors, &c. As shown, the observing instruments comprise sound locators A, B, the angular movements of which, corrected for lag &c., are transmitted to the instrument 5 which supplies the data for the director C. The instrument 5 comprises the two projectors A<1>, B<1> to which are transmitted the angular movements of the locators A, B respectively. The beams from the projectors, preferably in the form of strips 11, 11<1> at right-angles to each other, are received by the screen 14 mounted on threaded rods 15 which can be rotated by a handle 16 to adjust the screen vertically. The third projector C', the beam from which is annular, is adjustable in altitude and azimuth by the hand wheels 13, 12 respectively, these adjustments being fed into the director C by transmitters 19, 20. The vertical adjustments of the screen 14 are communicated to the director by a transmitter 21 operated by a slide 23 which is displaced by a link 24 pivoted at 25 and connected to a nut 91 on one of the rods 15. To enable the scale of the instrument to be changed, the pivot 25 may be arranged to be displaceable along a rotatable screw 27. The screen may be provided with graduations consisting of a number of lines 39 radiating from a point c directly above the vertical axis of the projector C', and of a series of arcs 37 of which the point c is the centre. Momentary values of speed and course of the aircraft may be read off by means of a pointer 75, Fig. 7, having a slot 78 into which passes a pin 76 on a suction cup 77 which can be attached to the screen 14. When the instruments A, B, Care not in the same horizontal plane, the projectors A<1>, B<1> may be made vertically adjustable to correspond to scale to the actual heights of the instruments A, B relatively to the instrument C which is taken as the datum. Specifications 415,201, [Group XI], 418,670, [Group XXI], and 456,078, [Group XXXVIII], are referred to.
Patent GB-767171-A (GB)
Title: Improvements relating to frequency discriminators and precision speed regulation
Inventor: LUDBROOK LESLIE CARTER
IPC: H03D3/08
Filed: 1952-08-21
Abstract: 767,171. Automatic speed control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 18, 1953 [Aug. 21, 1952], No. 21010/52. Class 38 (4). [Also in Group XL (c)] A frequency discriminator comprises means for applying the frequency of amplitude OX (Fig. 3C) to a resistor R and capacitor C in series and a second phase of the frequency, of equal frequency but differing in phase, e.g. by 90 degrees, and of approximately half amplitude PQ to a centre tap of the amplitude OX. Between, the point Q (unconnected to the centre tap) and the junction A of R and C a variable phase signal of amplitude QA is produced when the frequency varies and point A moves along the arc of the semicircle of diameter OX, and the amplitude QA will have a " notch " or minimum when the impedances of R and C are equal, i.e. when 2#f = 1/RC, or a null at the same frequency if PQ is adjusted to be equal to OP. The two phases may be derived from a two-phase tacho-generator connected to an electric motor or generator where speed is to be controlled and the amplitude of the second phase (in quadrature) may be adjusted (Fig. 6) by a potentiometer connected across the secondary of the output transformer T2P, T2S of the second phase, to produce a null type discriminator. The variable-phase output may be fed to an overdriven amplifier AMP which limits and squares the output wave and then by a transformer T3P, T3S, to a full-wave bridge demodulator whose D.C. output across a load resistor RL varies in amplitude and polarity on the sense and magnitude of the deviation of phase, i.e. change in frequency. This may be applied to a thyratron grid controlled rectifier circuit to control the power fed to the electric motor or generator to be controlled in speed. Constant ratios of speeds of different apparatus may be obtained from discriminators having different values of C. In a modification (Fig. 9A) the series R, C circuit is connected across the two phases of a two-phase tacho-generator connected in series and the junction point Q earthed, so that the point Q corresponds to Q in Fig. 3C. Further C may be connected to a potentiometer B across a part of the output transformer T of the coupled two phases, leading to a bridge phase discriminator as in Fig. 6, so that A moves round a semi-circle of diameter greater or less than OX with variations in frequency, i.e. a " notch " type discriminator may be produced corresponding to PQ (Fig. 3C) being greater or less than OP.
Patent GB-206230-A (GB)
Title: Improvements in process and apparatus for utilization of peat and other fuel
IPC: C10B53/02
Filed: 1922-08-01
Abstract: 206,230. Brandes, F. W. Aug. 1, 1922. Carbonizing processes ; retorts.-Distillation gases from peat or other fuel heated in a retort 4 are passed without any separate supply of steam into a receptacle 2 through which less valuable fuel such as peat moss is fed at such a velocity that its water content is wholly or partly removed and tar oils contained in the gases condense and impregnate the fuel. Purified gases leaving the receptacle, may be supplied to burners in a retort furnace, and a controllable part may be carried into the fuel being distilled in order to increase the proportion of non-condensable combustible gases. By regulating the temperature in the impregnating receptacle fuel of different qualities may be produced, a part of the volatile ingredients, e.g. being removed with the lighter volatiles of the heating gases and the heavier tar vapours impregnating the fuel. The impregnated product may be briquetted with or without the ground product of the retort, and the latter alone, or with other fuel, may be treated in the impregnating receptacle. In a modification combustion gases from a regenerator or other heating apparatus are carried round two or more retorts into which are fed respectively decayed peat and peat moss and the distillation products from the retorts are fed into an impregnating apparatus containing peat moss &c. which may be preheated. The gases leaving the impregnating apparatus may be led through an ammonia separator and then delivered to the regenerator before being introduced into the fuel in the retorts.
Patent GB-427720-A (GB)
Title: Improvements in emulsions and process of making the same
IPC: C08L95/00
Filed: 1933-07-26
Abstract: Bituminous emulsions are rendered stable during admixture with fibrous or mineral fillers by the addition, in the case of emulsions prepared solely by the use of alkaline water, of small quantities of trisodium phosphate, or, in the case of soapy emulsions, of trisodium phosphate preceded by an alkaline-earth metal salt such as calcium chloride in order to increase the fluidity.  Examples of the first class of emulsions are those prepared as in Specifications 226,032 and 254,012, [both in Class 81 (i)].  The products when admixed with the fillers may be employed in pavement construction, or as paints or waterproofing agents, or may be compacted into briquettes or blocks or rolled into sheets.  Examples: (1) an emulsion prepared as in Specification 254,012 has added to it \ba1/2\be per cent of trisodium phosphate in aqueous solution; (2) 7 parts of a soap solution prepared by saponifying 9 parts of Swedish rosin oil with 1 part of caustic soda in 15 parts of water, are mixed with 65 parts of molten asphalt and 0,154 parts of calcium chloride in 13,7 parts of water are added, followed by the addition of 0,169 parts of trisodium phosphate in 13,7 parts of water; the product is a fluid emulsion stable to admixture with fillers.
Patent GB-1345308-A (GB)
Title: Permoselective membranes
IPC: C08F14/08
Filed: 1972-05-04
Abstract: 1345308 Permoselective copolymer membranes MONTECATINI EDISON SpA and CONSIGLIO NAZIONALE DELLE RICERCHE 4 May 1972 [4 May 1971] 21051/72 Heading B5B [Also in Division C3] Permoselective membranes are prepared from copolymers of 10-90 mole per cent of a vinylpyridine, vinylpiperidine or vinylquinoline, optionally having up to 2 alkyl substituents, with vinylidene chloride and/or α-chloroacrylonitrile by the following steps: (a) forming a solution in an organic solvent, e.g. dimethylformamide, of the copolymer, preferably mixed with another polymer containing double bonds and/or halogen atoms, such as poly(vinyl chloride), (b) casting the solution, e.g. on a glass plate, and evaporating the solvent at 80 C. or below to produce the membrane, (c) heating above 80 C. to cross-link the polymer(s), and (d) quaternizing some or all of the nitrogen atoms in the copolymer. Step (d) is carried out by treating the membrane with a quaternizing agent dissolved in a solvent capable of penetrating the membrane. This reaction is preferably carried out in two stages, the second at a higher temperature than the first, and may also involve treatment first with a polyfunetional quaternizing agent and then with a monofunctional one. In examples membranes derived from 2- or 4-vinylpyridine and vinylidene chloride or chloroacrylonitrile are quaternized with diiodoethane and/or methyl iodide.
Patent GB-1024510-A (GB)
Title: Purification of industrial clouds or smoke
IPC: B04C3/00
Filed: 1963-05-27
Abstract: 1,024,510. Purifying smoke. ESSO STANDARD S.A. FRANCAISE. May 27, 1963 [June 19, 1962], No. 21152/63. Heading B1R. In a method of purifying smoke the smoke is contacted with a surface having flowing therein a film of a bitumen or bitumen cut-back which is liquid at the temperature of operation. The contact surfaces may comprise plates arranged in a vertical column and downwardly inclined or in a horizontal column and inclined to the vertical, the smoke traversing a tortuous passage in contact with the flowing films of bitumen or bitumen cut-back. As shown in Fig. 2 the contact surfaces comprise vertical plates 7 arranged in an annular contact zone. In other forms of apparatus suitable for carrying out the method the bitumen or bitumen cut-back flows over a spiral surface arranged in a vertical or a horizontal casing.
Patent GB-1499683-A (GB)
Title: High power laser mirror
IPC: H01S3/04
Filed: 1975-05-19
Abstract: 1499683 Mirror surfaces by vacuum evaporation WESTINGHOUSE ELECTRIC CORP 19 May 1975 [20 June 1974] 21206/75 Heading C7F [Also in Division G2]  A mirror comprises a refractory composition substrate 12 having, on at least one surface, an optical finish of roughness between 7 and 10Š RMS; a metal film 18, having a thermal conductivity equal to or greater than that of gold, covering the optical finish and a protective transparent electric film 22 covering the metal film 18, the fibers being deposited by vacuum evaporation. In the Fig., a substrate 12 of silicon carbide or silicon nitride, or a mixture of the two, has cooling channels 16 and has an optically finished face 14 to which is applied a layer 20 of nickel or chromium to improve the adhesion of the reflecting layer 18 which may be Cu, Ag or Au. A protective dielectric film 22 e.g. of the fluoride of La, Th or Pb is provided. Thicknesses of the layers are preferably:- 20, about 5 mils; 18, 1500-5000Š; 22, 500- 2000A. In the Example, a polished sintered SiC substrate is coated successively with Cr, Ag, and lanthanum fluoride.
Patent GB-1186906-A (GB)
Title: Improvements in and relating to the Flotation of Minerals and Ores with a Calcareous and/or Dolomitic Gangue
IPC: B03D1/02
Filed: 1967-05-08
Abstract: 1,186,906. Froth flotation. SOC. DE PRODUITS CHIMIQUES D'AUBY. 8 May, 1967 [11 May, 1966], No. 21211/67. Heading B2H. In a method of up-grading minerals or ores having a calcareous and/or dolomitic gangue by froth flotation of the minerals to be recovered, there is added to the flotation medium a modifying agent acting on the gangue and comprising a water-soluble polymer of acrylic acid having a molecular weight of less than 10,000 and an average Brooksfield viscosity index of between 5 and 500 centipoises at 25‹C. The modifying agent has the general formula: in which R is H or CH 3 , X is H or a cation which may be inorganic, e.g. Li, Na, K or NH 4 , or organic, and n is an integer. The method is applicable to the flotation of oxidised ores of Cu, Pb or Zn which may be first treated by sulphuration. The modifying agent may be added to the flotation medium during the course of, or before flotation. Examples are given in which sodium hydrosulphide is used as sulphuration agent, potassium amyl-xanthate as collector and pine oil, gas oil and cresylic acid as foaming agents.
Patent GB-235755-A (GB)
Title: A device for playing table football
IPC: A63F7/24
Filed: 1924-09-08
Abstract: 235,755. Findlay, A. P. Sept. 8, 1924. Table games.-In a table football appliance of the kind wherein the figure of a footballer is carried on a handle and has a pivoted spring-actuated leg, a downwardly-pointing extension 14 at the rear of the leg is connected to a rod 6 mounted outside, or within, the handle 5, so that on the rod being drawn back against the action of a spring 10 the leg is swung back, and on the rod being released the leg is swung forward. The toe 12 is turned at right-angles to the foot to facilitate kicking the ball. In a modification a connecting rod is interposed between the rod 6 and the leg.
Patent GB-1425769-A (GB)
Title: Counters
IPC: G06M1/28
Filed: 1973-05-04
Abstract: 1425769 Counters XEROX CORP 4 May 1973 21255/73 Heading G4D A predetermined counter, such as for controlling the number of copies produced by a photo-copying machine, comprises a fixed scale against which can be set an indicator 1 to determine the number of copies and a stop 4 spring biased towards the high end of the scale into engagement with the indicator 1 and movable stepwise away from the indicator against the bias by each operation of the machine. The stop 4 is carried by an endless toothed belt 3 running over pulleys 21, 22 one of which is coupled to ratchet 6 driven through a pawl 12 by the machine. When a push button B is pressed a restraining pawl 10 is released allowing stop 4 to move into engagement with indicator 1 under the influence of a coiled spring 8. Subsequent operations of the machine drive the stop back towards zero where it operates a microswitch M to stop the machine. If the indicator 1 is set beyond the end of the scale it engages a linkage 13 to disable the pawl and ratchet drive so the machine continues indefinitely.
Patent GB-1302644-A (GB)
IPC: H01Q1/08
Filed: 1971-04-19
Abstract: 1302644 Aerials GTE SYLVANIA Inc 19 April 1971 [2 Feb 1970] 21295/71 Heading H4A A multi-band aerial array comprises an individual aerial section for each band. A twoconductor transmission line extends axially in each section, and a plurality of aerial elements extend transversely thereform. Coupling means are associated with the transmission lines, so that the sections may be detachably coupled together in series. As described, an array has three sections 13, 14, 15, Fig. 4, for operation respectively in the frequency bands 470 to 890 MHz., 174 to 216 MHz., 54 to 108 MHz. Each section consists of a thin trapezoidally-shaped sheet of plastics material upon which is printed or otherwise formed conductive patterns of transmission lines and aerial elements. The sections 13, 14 each have, on one side of a sheet 19, a pair of longitudinally extending parallel transmission line conductors 17, 18 from which axially spaced dipoles 20 extend. Elements of the dipoles on the same side of the axis X-X are connected to the same one of the two transmission line conductors. Parasitic elements 21 are formed on the other side of the sheet 19. The section 15 is formed without parasitic elements, and has a transmission line conductor 17<SP>1</SP> on one side of a sheet 19<SP>1</SP>, another transmission line conductor 18<SP>1</SP> on the other side thereof. Successive dipole elements 20<SP>1</SP> on one side of the sheet 19<SP>1</SP> are alternately disposed on opposite sides of the axis X-X and are electrically connected to the transmission line conductor 17<SP>1</SP> on that side, whereas dipole elements 20<SP>11</SP> on the other side of the sheet 19<SP>1</SP> are connected to the transmission line conductor 18<SP>1</SP>. The lengths and spacings of the dipoles in the section 15 vary in accordance with the log-periodic principle. The section 13 is joined to the section 14, and likewise the section 14 to the section 15, by means of a plurality of snap fasteners which are provided along their adjacent edges. The transmission line conductors are similarly coupled together by snap fasteners, which are duplicated to ensure electrical continuity. An adaptor is provided for connecting a cable to the feed end of the section 13, and a balun may be included if the cable is of co-axial type (Figs. 8, 9, 10, not shown). Eyelet holes 25 in the corners of the sections 13, 14, 15 allow the array to be suspended by means of strings, for example, in the roof space of a house (Fig. 1, not shown). The sections of the array may be detached, and the transmission lines coupled together by cables, if it is desired to align said sections in different directions (Fig. 11, not shown). If the section sheets are sufficiently flexible, they may be rolled up to facilitate storage (Figs. 2, 3, not shown).
Patent GB-262387-A (GB)
Title: Improvements in or relating to suction appliances for dentures
IPC: A61C13/24
Filed: 1926-08-31
Abstract: 262,387. Estelmann, H. Aug. 31, 1926. Teeth, artificial.-A rubber suction plate C is secured to a vulcanite denture A by means of a metal frame D which is inserted in a groove in the edge of the suction plate C and is fastened by means of screws E to a metal plate B, or a series of separate metal nuts, vulcanized in the denture. Woven or plaited wire may be incorporated in the lower flange of the suction plate through which the screws pass, and two or more suction plates of small dimensions may be secured to the metal plate B. A known construction in which a rubber suction plate with a wirereinforced edge is cemented in an undercut recess in the vulcanite dental plate is also referred to.
Patent GB-864032-A (GB)
Title: Improvements relating to hydraulic pit props or the like
IPC: E21D15/51
Filed: 1957-07-05
Abstract: 864,032. Mine roof supports. GUTEHOFFNUNGSHUTTE STERKRADE A.G. July 5, 1957 [July 5, 1956], No. 21436/57. Class 20(2) A hydraulic pit prop comprises two telescoping parts 1, 2 which are extended by a differential piston 9,10, 11 operated by rotating a lever 41 through 180 degrees, and are released by rotating the lever 41 through the remaining 180 degrees to open, by means of a projection 14 on the piston 10, a ball valve 15 and subsequently a valve member 12. The prop is first extended t y a low pressure piston 11 and, when its relief valve 13 operates, is set by a high pressure piston 10. A pressure relief valve 11 A is provided.
Patent GB-575627-A (GB)
Title: Improvements in or relating to holders for thermionic valves and other electrical appliances
IPC: H01R33/76
Filed: 1943-12-22
Abstract: 575,627. Thermionic valve-holders. CINCH MANUFACTURING CORPORATION. Dec. 22, 1943, No. 21492. Convention date, Dec. 16, 1942. [Class 38 (i)] A valve-holder comprises an insulating base 1 having an annular series of holes 10 which are reduced in crosssection at the lower end by a projecting shoulder 13, a contact made from sheet metal fitting into each hole and having a slit cylindrical portion 20 that rests upon the shoulder 13 and a semicylindrical portion 23 that projects through the reduced aperture to provide a wiring terminal. This projecting terminal is notched at 24 so that it can be flattened to prevent withdrawal of the terminal and to enable it to be bent at right-angles adjacent the under-surface of the base 1 between radial ribs, the end of the terminal being again bent into an oblique position. The base 1 has a flange 2 notched at 6 to engage projections 7 on the mount 3 which is also pressed into recesses in the flange. Specification 555,922 is referred to.