baber/WOPTO huggingface dataset:
Patent GB-1034234-A (GB)
Title: Photographic cameras with automatic diaphragm-setting devices
IPC: G03B7/083
Filed: 1964-05-13
Abstract: 1,034,234. Photographic exposure control systems. COPAL, KABUSHIKI KAISHA. May 13, 1964 [May 13, 1963], No. 19819/64. Heading G2A. [Also in Division G1] In an exposure control system for a camera, the exposure time is set manually by adjusting a mechanical retard device 17, the action of depressing the shutter release 1 then interlocks mechanisms controlling the lens diaphragm blades 9 and the aperture blades 5, 6 admitting light to a photoconductive element R x  in a transistorized switching circuit whereby the lens aperture is opened to the optimum value for the chosen exposure time whereupon the circuit energizes an electromagnet M to lock said mechanisms at that value. As release 1 is depressed the above circuit is energized as switch SW is closed while member 3 is rotated by a spring (not shown) against the restraint of lug 1b on release 1. Pins 3b, 3c or member cam blades 5, 6 laterally by engagement with slots 5d, 6d, and pin 3d on the member rotates control lever 10 about pivot 11 whereby the diaphragm adjusting ring 8 is also moved by engagement with pin 8a. As blades 5, 6 open the resistance of R x  falls until the polarity of points A and B reverses and the transistors T 1  and T 2  conduct to energize electromagnet M thereby attracting lever 24 whose arm 24a then urges lock lever 21 against spring 23 to engage notched member 19. Since member 19 is pivoted at 20 by its engagement with diaphragm ring 8 through pin 8b, the lever 21 thus stops further opening of the lens diaphragm. Resistor R 0  is preset according to filter speed while the resistor R f  is pre-set for shutter speed by rotation of retard ring 18. At the end of the release downstroke, lever 15 is moved to actuate the shutter blades 26. In an alternating form, the electromagnet is initially energized and releases lever 24 to lock the optimum aperture setting.
Patent GB-387691-A (GB)
Title: Improvements in or relating to apparatus for use in electrically stunning animals tobe slaughtered, and a method of using the same
IPC: A22B3/06
Filed: 1931-07-10
Abstract: 387,691. Electrically stunning animals. SCHMIDT, J. and INDUSTRIAL WASTE ELIMINATORS, Ltd., 20, High Holborn, London. July 10, 1931, No. 19944. [Class 5 (i).] A method of electrically stunning animals by the use of manually applied electrodes comprises placing the electrodes at opposite sides of the animal's head so that the current passes from side to side through the animal's brain. Three phase current may be used, the electrodes being so arranged that two current paths intersect in the animal's brain. A weak current is first passed between the electrodes to cause the animal to collapse slowly, the current being then increased to its full strength completely to stun the animal. An appliance for carrying out this method comprises a forked member 20, Fig. 1, of inverted V-shape, each of the prongs constituting or carrying an electrode 24, 25, a resilient rod 28 carrying a third electrode 26, and a handle 30 ; the electrodes automatically accommodate themselves to the size of the animal's head. In a modification, to provide greater resilience, the fork is of inverted U shape. In a further modification, Figs. 3 and 4, the third electrode 33 is carried by a rod 32 separate from the fork 20, which latter carries a switch 34: the electrodes 24, 25, which may be of serrated metal or of brush-like metallic fabric, are removably mounted, by means of stop pins 37 and catches 38, on resilient strips of metal 36 mounted on but insulated from the prongs, the strips 36 being connected to the leads passing through the handle 30. In a further modification, Fig. 6, four electrodes 24, 25, 26, 44 are carried by a head yoke which also carries a switch 46 and which may carry an eyeshade. In further modifications, inverted U-shaped forks carrying forwardly and/or rearwardly projecting bars support four, five or six brush electrodes. Direct current of sufficiently high tension or single-phase or two-phase alternating current may be used in place of three-phase current. As a further modification, the electrodes may be in the form of cylindrical, rotatable, spiked brushes. Reference has been directed by the Comptroller to Specification 364,386.
Patent GB-1063734-A (GB)
Title: Method of producing hardened steel products
IPC: C21D8/02
Filed: 1964-05-13
Abstract: Steel sheet, which may be hypo- or hypereutectoid, is austenitised at the lowest possible temperature and is then passed through rolls or dies whereby it undergoes 1-20% reduction in thickness and is simultaneously cooled to below the nose of the transformation curve. It is then allowed to air cool through the martensitic transformation range after which it may be tempered to any desired hardness. Hypoeutectoid steel may be austenitised at not more than 50 DEG F. above Ac3 and hypereutectoid steel at not more than 50 DEG F. above Ac1, while the sheet may enter the rolls between 50 DEG F. above and 25 DEG F. below Ac1. The product may be used for cutting tools.
Patent GB-1221812-A (GB)
Title: Improved waste treatment process
Inventor: SAK JAMES GEORGE
IPC: C02F1/52
Filed: 1968-04-26
Abstract: 1,221,812. Dewatering sludges. DOW CHEMICAL CO. 26 April, 1968, No. 20005/68. Heading C1C. Sludges are dewatered by a process in which the primary sludge is treated with 0À05 to 2 p.p.m. of an anionic polymer then mixed with a secondary sludge of less than 0.9 solids ratio in the mixture and at least 40% less than the ratio without anionic preconditioning before treatment with a cationic reagent.
Patent GB-404355-A (GB)
Title: Improvements relating to the production of distorted photographs
IPC: G03C5/04
Filed: 1932-07-15
Abstract: 404,355. Producing distorted photographs. FORD, G. W., 49, Cragnair Avenue, Patcham, Brighton. July 15, 1932, No. 20056. Drawings to Specification. [Class 98 (ii).] In a process of producing distorted photographs in which a distorted image of a person appears in normal surroundings, the person is photographed through a distorting lens system against a background which is distorted in such a manner that the image thereof produced by the distorting lens system is undistorted. The background may be composed of actual objects on a distorted scale e.g. of twice the normal vertical height or a painted background may be used. Alternatively, the background may be projected from a distorted film or slide or from a normal film or slide, a distorting system being associated with the projection lens. The process may be applied to still or motion pictures.
Patent GB-708130-A (GB)
Title: Improvements in or relating to sewing machines
IPC: D05B37/04
Filed: 1951-08-25
Abstract: 708,130. Sewing-machines; trimming shoe soles. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Aug. 25, 1952 [Aug. 25, 1951], No. 20061/51. Classes 17(1) and 112 In a straight-needle sewing-machine for conforming a shoe upper to a last and securing together a margin of the upper and a margin of a shoe bottom member on the last, means are provided for trimming the margins of the upper and shoe bottom member. In the machine described a roll is used to grip and feed the upper, and the work is trimmed between the needle and the part engaged by the roll. The machine shown is similar to that described in Specification 392,580, having a straight needle 42 carried on a needle-bar 66, a rotary chain-stitch looper 44, a lower feed roll 12 surrounding the looper shaft and driven by a ratchet shaft through helical gears 36, a work-support 94, and an upper roll 10 to grip against the lower roll margins of parts 2, 8 of a shoe mounted on a last 9; the shoe is of the form described in Specification 658,059. The roll 10 is mounted on a stud 14 clamped on a member 16 which is pivoted at 18 so that the roll can be swung away from the work against the action of a spring 27 arranged on a rod 30 which is pivoted at 32 to a clamping lever 34 and which slidably engages a lug on the member 16; the roll is driven by a second ratchet shaft through helical gears 22. The lower roll 12 may be adjusted axially, its hub being screw-threaded to engage a collar 108 which is clamped thereon-and which is confined between faces on the machine frame. A block 52, adjustably fixed to the frame, provides a guideway, inclined downwardly in the direction of feed, for a trimming knife 48 clamped at its upper end in a block 72 connected by links 80 to an intermediate point on a lever 84 which is pivotally mounted at one end on a frame and is connected at the other end by a pair of links 88 with a block 92 clamped to the needle-bar 66. The block 52 extends down between the needle and the upper roll 10, and may contact the upper surface of the work to steady it close to the sewing point; it has a channel to receive the needle-bar and an arcuate recess to accommodate the roll 10 and allow it to swing upwards, and has a forward projection at the right-hand side of the needle. The work-support 94 has its upper end level with the top of the lower roll 12, and is formed with a shearing edge to co-operate with the blade 48; it supports the work on all sides of the needle, which passes through a slot in it. The work-support is adjustable vertically and horizontally, the latter adjusting movement being obtained by a screw 106 bearing against the machine frame.
Patent GB-263701-A (GB)
Title: Improvements relating to exhaust silencers for internal combustion engines
IPC: F01N1/16
Filed: 1926-08-17
Abstract: 263,701. Russell, H. H. Aug. 17, 1926. Exhaust silencers.-A silencer comprises an inner expansion chamber 1 connected at 2 to the exhaust pipe, an outer chamber 3 surrounding the inner one and communicating therewith by way of openings 4, and an outlet conduit 5 enclosed by a jacket 7 connected by openings 9 with the chamber 3 and by openings 8 with the conduit 5, communication between the chamber 3 and the conduit 5 being controlled by a butterfly or other valve 6. A baffle 11 is provided in the jacket 7, and the conduit 5 preferably terminates in a fish-tail outlet 10.
Patent GB-1270452-A (GB)
Title: Apparatus for dusting objects with powder
IPC: B05D1/06
Filed: 1969-04-21
Abstract: 1,270,452. Powder distributors. ATLAS COPCO A.B. 21 April, 1969 [26 April, 1968; 14 Dec., 1968; 14 Jan., 1969; 27 March, 1969], No. 20345/69. Heading B2F. Apparatus for spraying articles with powder from a powder-gas mixture comprise a spray gun 1 with an inlet 3 for a powder-gas stream, stationary vanes 9 shaped and located to impart a whirling motion to said stream, and a Venturi system 12 through which said stream passes adapted to accelerate the powder particles. A further inlet 7 for a supply of additional gas and a further Venturi system may be present. An electrode 15, 16 connected to a high voltage source may be present to effect charging of the particles. The Venturi 12 may have an axis inclined to that of the powdergas stream supplied, and the gun may have a tubular nozzle with holes in the walls thereof allowing at least a part of the gas to escape sideways, or the gun outlet may be provided with a jet-shaping baffle which may act as electrode. At least part of the powder-gas conduit may be coated with abrasion-resistant material, e.g. polytetrafluoroethylene.
Patent GB-243785-A (GB)
Title: Improvements relating to the mounting of incandescent filaments
IPC: H01J1/18
Filed: 1924-08-28
Abstract: 243,785. Mullard Radio Valve Co., Ltd., and Harley, L. S. Aug. 28, 1924. Filaments, supports for.- A yielding member 9 is arranged to damp out the vibrations of a flat spring 7 which holds and applies tension to the filament 5. The spring may, before attaching the filament, be arranged at a predetermined distance from the damper 9, such that the required tension is applied to the filament when the spring is depressed into contact with the damper. To prevent lateral separation of the spring from the damper, the free end of the latter is lodged in a concavity in the spring. Specification 196,308, [Class 39 (i), Electric lamps, Arc &c.] is referred to. Reference has been directed by the Comptroller to Specification 227,454, [Class 39 (i), Electric lamps, Arc &c.].
Patent GB-638086-A (GB)
Title: Improvements in or relating to braced structures for flush doors
IPC: E06B3/70
Filed: 1947-07-29
Abstract: 638,086. Doors ; panels. LARSEN, H. HAUGAARD-. July 29, 1947, No. 20434. Convention date, July 2, 1946. [Classes 20 (iii) and 87 (i)] [Also in Group XXIII]  In a bracing of rigid laths 1, 2, e.g. of wood fibre board for flush doors, the transverse incisions 3 whereby the laths are interengaged are bevelled at their outer ends to facilitate assembly and provide air passages between the cells formed when the facing sheets are glued to the laths and the lath assembly is fitted together in one pressing operation. The Specification as open to inspection under Sect. 91 describes also the use of the braced structure for panels, walls, and laminated floors. This subject-matter does not appear in the Specification as accepted.
Patent GB-763589-A (GB)
Title: Tool and apparatus for the production of corrugated sheaths for electric cables
IPC: B29C48/05
Filed: 1952-10-21
Abstract: 763,589. Sheathing electric cables. OSNABRUCKER KUPFERUND DRAHTWERK. Oct. 21, 1952 [Oct. 22, 1951; Dec. 21, 1951], No. 20471/54. Divided out of 763,588. Classes 83 (2) and 83 (4). Corrugating.-A tool for corrugating an electric cable sheath comprises a helical band 2, Figs. 4, 4a, or a set of helically-arranged rollers in the form of an Archimedean spiral. The band is mounted in a screw-threaded rotating holder 3 which may be split and spring-pressed into engagement with the work. The band may also be interrupted by transverse grooves 2a to reduce friction. In apparatus for corrugating a tube the tool 2, Fig. 5, is mounted in a chuck 4 and loaded into engagement with the sheath by adjustable compression springs 13. The torque on the sheath is resisted by an oppositely rotating friction gripping member 10 similarly mounted spring-loaded in a chuck 9. The sheath may alternatively be corrugated with two helical threads of opposite hand, the gripping member 10 being replaced by a second forming tool of opposite hand.
Patent GB-1321585-A (GB)
Title: Checking cassette seals
IPC: G01M99/00
Filed: 1971-04-19
Abstract: 1321585 Testing cassettes AGFA-GEVAERT AG 19 April 1971 [27 Jan 1970] 20481/71 Heading G2A A machine for testing whether the arms 13, 14 of a U-shaped cassette cover 12 are properly sealed to the cassette body 11 applies a tensile force to these arms, and, if the sealing is defective a signal is produced which actuates a device for ejecting the faulty cassette. As shown, the cassettes 10 are supplied to the machine by a conveyor belt, and as soon as a plate 17 at the end of a piston 16 is sufficiently retracted (to the left) the cassette falls into a guide channel. A contact in the bottom of this channel detects the presence of the cassette and causes the piston 16 to push the cassette to the right into a testing station 22, where further movement is prevented by a locking lever (26), Fig. 4 (not shown) actuated by a cam on plate 17. A cassette which is in station 22 and has already been checked is at the same time pushed out of this station. A lug (27) at the end of the locking lever (26) carries a contact which, when closed by the advancing cassette, actuates suction means which exert a force on the arms 13, 14 of the cassette cover. If one of the arms is not sealed firmly enough to the cassette, it is drawn away by the suction means, and closes a contact 39, Fig. 5 (not shown) which produces a stored pulse. As the cassette is pushed out of the testing station it passes an ejector piston 42, and if a stored pulse has been produced because of a defective cassette, this actuates the piston 42 to eject the cassette, as shown in Fig. 3.
Patent GB-1358960-A (GB)
Title: Preparation of 2,2,2-trifluoroethyl difluoromethyl ether
IPC: C07C43/12
Filed: 1972-05-03
Abstract: 1358960 2,2,2-Trifluoroethyl difluoromethyl ether AIRCO Inc 3 May 1972 [3 May 1971] 20567/72 Heading C2C 2,2,2-Trifluoroethyl difluoromethyl ether is prepared by reacting 2,2,2-trifluoroethanol and chlorodifluoromethane in the presence of an alkali metal hydroxide (e.g. NaOH) and a solvent system comprising water and one or more of N-methyl pyrrolidone, dimethyl sulphoxide, tetramethylene sulphone and diethylene glycol dimethyl ether. The reaction is preferably carried out at 20-75 C. under a pressure of 100-300 lb./in.<SP>2</SP> gauge. The alkali metal hydroxide is preferably added as an aqueous solution and is normally present in the reaction mixture in an amount of 90-150 wt. per cent based on the weight of 2,2,2-trifluoroethanol. The solvent system, which generally contains 10-20 wt. per cent of organic solvent, is preferably present in an amount of 110-150 wt. per cent based on the weight of 2,2,2-trifluoroethanol.
Patent GB-205255-A (GB)
Title: Improvements in and connected with kinematographic and like screens
IPC: G03B21/58
Filed: 1922-07-08
Abstract: 205,255. Dewey, H. July 8, 1922. Projection screens.-A screen 1 is provided with a flexible wire around its periphery and is tensioned by springs 6 or the like connected to the wire and to a frame or other support 5. A separate wire may be used for each edge of the screen and may be enclosed by a strip of webbing or the like 7 stitched to the screen. Specifications 153,724 and 204,787 are referred to.
Patent GB-1038275-A (GB)
Title: Azido- and amino-steroids
IPC: C07J53/00
Filed: 1965-05-17
Abstract: Novel steroids of the formulae <FORM:1038275/C2/1> and <FORM:1038275/C2/2> (wherein R is N3 or NR1R11 is hydrogen or C1- 4 alkyl and R11 is hydrogen, C1- 4 alkyl or acyl) are prepared by treating steroids of the formula <FORM:1038275/C2/3> (wherein R1 is as defined above and R11 is C1- 4 alkyl, phenyl or tolyl) with 5 to 40 moles per mole of the steroid of an azide AN3 (wherein A is sodium, potassium, lithium or tetraalkylammonium) in an inert, aprotic, nucleophilic solvent having a dielectric constant of at least 10, at a temperature between 50 DEG  and 120 DEG  C. for at least 30 minutes, and isolating from the reaction mixture the formed 3a -azido-androst-5-ene and 6a -azido-3a ,5a -cycloandrostane, and, when required, reducing these to the corresponding amino compounds. The acylamino, alkylamino, dialkylamino and N-acyl-N-alkylamino compounds are prepared by standard alkylation and acylation procedures.  In the azide-forming process, when the desired product is the 6a -compound the preferred reaction medium is N-methyl-acetamide, while when the desired product is the 3a -compound, the preferred medium is dimethylsulphoxide.  The azido compounds may be separated by diluting the reaction mixture with water, extracting with ether, drying and evaporating the extract, separating the 3a -azido compound by crystallization from an alcohol and water, and isolating the 6a -azido compound from the mother liquor by chromatography on a magnesium silicate column.  Ester products may be saponified to the free acids which in turn may be esterified.  Steroids of the third general formula above are prepared from the corresponding 3b -hydroxy steroids and sulphonyl halides.
Patent GB-420425-A (GB)
Title: Glass disc jet for spraying nozzles
IPC: B05B1/00
Filed: 1934-07-17
Abstract: 420,425. Spraying-nozzles. HOOPER, W. E., Hoopers Garage, Wellington, Nilgiri Hills, India. July 17, 1934, No. 20887. Drawings to Specification. [Class 69 (iii)] A nozzle for high pressure sprayers comprises a glass disc having a central hole bevelled at each surface of the disc.
Patent GB-762630-A (GB)
Title: Process for the fluid treatment of yarns and apparatus therefor
IPC: D02G1/16
Filed: 1954-07-19
Abstract: 762,630. Finishing yarns. DU PONT DE NEMOURS & CO., E.I. July 19, 1954 [April 22, 1954], No. 20956/54. Class 120 (3). In the production of a bulky filamentary yarn, a yarn is introduced into a fluid stream at an appreciable angle viz. from about 45 to about 60 degrees, thereto while the stream is obstructed in such a manner that turbulence thereof is created downstream of the locus of injection of the yarn and causes individual filaments of the yarn to be agitated and so convoluted. As shown in Fig. 1, yarn 1 fed at a rate controlled by rolls 2 and 3 a yarnintroducing assembly 6 protruding from a housing 30 of a jet which is supplied with compressed air through a pipe 7, passes into a turbulent stream of air, and issues abruptly in bulky form from a fitting 40 to be forwarded at a controlled rate by rolls 4 and 5. The jet, Fig. 4, comprises the housing 30 the main bore 20 of which is stepped to accommodate a gasket 47 and centrally-bored fitting 40 which has a throat 43 enlarged by a counterbore 29 and leading to a flared mouth or yarn exit 49 and is retained in position by a screw 38 pressing a bifurcated clamp 39 embracing an extension 28: aligned secondary bores 33 and 41 and a blind extension 42 thereof intersect the main bore and adjustably accommodate a yarn tube 32 and semi-cylindrical extension 42 thereof (constituting the obstruction causing turbulence) and slidably house a yarn tube casing 31 which extends into a nut 44 the interior of which is flared and carries a similarly flared insert 45 forming the inlet for the yarn : the front of the housing is divided from top to bottom, for part of its depth, by a slit, into sides, as at 36, which are drawn together by means of a screw 34 sufficiently to secure the casing 31. The obstruction e.g. a slender obstacle, such as a pin, of uniform or uneven longitudinal or transverse cross-section, may be separate from the yarn-introducing means e.g. fixedly or adjustably, slidably or rotatably, mounted in the main bore. Specification 732,929 is referred to.
Patent GB-795804-A (GB)
Title: Improvements in electron valves
IPC: G06G7/26
Filed: 1954-07-20
Abstract: 795,804. Thermionic cathode tubes. SOC. NOUVELLE DE L'OUTILLAGE R. B. V. ET DE LA RADIO-INDUSTRIE. July 20, 1954 [July 24, 1953], No. 21167/54. Class 39(1). In a thermionic valve the output signal of which is to be a desired function of the input signal, the effective area of the cathode utilized is varied by the application of said input signal to a control electrode, and the outline of the cathode area itself is given a particular shape dependent on the function required. Figs. 3A and 3B show examples of cathodes in which the active area lies between curves 12, or 121, respectively, the configuration of these outlines being determined by the required function. As the grid potential varies, the part of this area utilized varies. Such a cathode may be used in a straightforward triode construction, or in the construction of Fig. 4, where secondary-emissive anode 18 is surrounded by a final collector anode 19. The control electrode may be divided into two parts, to which different modulating voltages may be applied independently, so providing a more extended range of output-to-input relationships. The electrode construction may be duplicated on either side of a central cathode. Instead of an actual cathode, a virtual cathode may be used, the shaped cathode being obtained by allowing the electrons from the cathode image to pass through a shaped aperture. Fig. 7 shows such an embodiment, in which again the electrode structure is duplicated. The cathodes are emissive surfaces 23, 24 on the inside of a box-like structure 20. The electrons from cathode 24 travel in a curved path under the action of the magnetic field of a coil 26 to form a virtual cathode in the same plane at 21, where they pass through an aperture of the required shape, and then between separately controllable modulating electrodes 29, 30 to an anode 32. The electron density at the virtual cathode is varied according to the magnetic field, which thus affords a further control in accordance with a second independent variable. The output current can therefore be arranged as a function f(x) of the input signal x, or as the product f(x)F(y) of two functions, of two independent input signals x and y.