baber/WOPTO huggingface dataset:
Patent GB-1519380-A (GB)
Title: Method and apparatus to control aircraft having dual rigid rotors
IPC: B64C27/80
Filed: 1976-10-26
Abstract: 1519380 Helicopters UNITED TECHNOLOGIES CORP 26 Oct 1976 [13 Nov 1975 (2)] 44425/76 Headings B7W and B7G A control for a helicopter having dual coaxial contra-rotating rigid rotors varies the cyclic control phase angle of each rotor in flight as a function of forward speed. This controls the coupling of lateral cyclic pitch with longitudinal cyclic pitch so as to introduce differential cyclic pitch inputs which automatically produce aerodynamic moments in each rotor to minimize manoeuvre - generated gyroscopic precession moments.
Patent GB-1003710-A (GB)
Title: Improvements in or relating to the coating of wire, strand, ropes and the like filamentary material with plastic
Inventor: BARFORD JOHN COWPER
IPC: B29C48/15
Filed: 1962-11-29
Abstract: A filament (e.g. wire, strand or rope) is coated with plastic by passing it through an aperture of diameter suitable for controlling the thickness of the plastic coating, forming a store or bank of the plastic in a sufficiently fluid condition around the filament at the inlet side of the aperture and drawing the filament through the store and aperture at a speed sufficient to form a rolling doughnut-shaped state of the plastic in the store, and feeding the store with additional plastic to maintain it. Apparatus is described in which a steel wire is pre-heated and passed through a heated die which is supplied with powdered and partly fused polythene from an extruder; alternatively, the pulverulent plastic may be applied to the pre-heated wire by an extrusion process, by dipping in pulverulent plastic, or by a combination fluidised-bed and electrostatic-attraction process, and the roughly coated wire then passed through a heated die.  A plurality of dies may be employed, which may be chromium-plated or P.T.F.E. coated and may be of different shapes.ALSO:A filament (e.g. wire, strand or rope) is coated with plastic by passng it through an aperture of diameter suitable for controlling the thickness of the plastic coating, forming a store or bank of the plastic in a sufficiently fluid condition around the filament at the inlet side of the aperture and drawing the filament through the store and aperture at a speed sufficient to form a rolling doughnut-shaped state of the plastic in the store, and feeding the store with additional plastic to maintain it. Apparatus is described in which a steel wire is pre-heated and passed through a heated die which is supplied with powdered and partly fused polyethylene from an extruder; alternatively, the pulverulent plastic may be applied to the pre-heated wire by an extrusion process, by dipping in pulverulent plastic, or by a combination fluidized-bed and electrostatic-attraction process, and the roughly-coated wire then passed through a heated die.  A plurality of dies may be employed, which may be chromium-plated or P.T.F.E. coated and may be of different shapes.
Patent GB-960129-A (GB)
Title: Improvements in or relating to fluorescent electric light fittings
IPC: F21S8/00
Filed: 1961-12-16
Abstract: 960,129. Supporting shades on lamp fittings. J. PEARSON, March 18, 1963 [Dec. 16, 1961], No. 45171/61. Heading F4R. [Also in Divisions H1 and H2] An electric light fitting for at least one fluorescent tube 7 provided with a ballast in the form of an incandescent lamp 13 comprises a central annulus 1 from which radiate three metal arms 2 each of which terminates in a metal clip 5 by means of which the fluorescent tube may be detachably mounted in the fitting, the clips being in contact with the wall of the tube and also connected by way of a high resistance 21 to a source of potential thus to facilitate starting of the tube 7, the annulus 1 further being used as a mounting for a holder 8 for the incandescent ballast lamp 13. The arms 2 also provide the means for mounting a shade 3, a starting switch 18 being attached to one of the arms 2. In a further embodiment the arms 2 support two concentric wire annuli, one of which has a diameter substantially equal to the internal diameter of the tube, the other of a somewhat lesser diameter, a flat annular shade being fixed between the two wire annuli and a further shade of frusto-conical form being hung from the smaller annulus by means of clips. One of the pillars 11 in the holder for the fluorescent lamp is divided into two parts so that, when connected to an A.C. supply, the incandescent lamp 13, the two filamentary electrodes 7a, 7b of the fluorescent tube 7 and the starting switch 18 form a series circuit with the central annulus 1 and arm 2 connected to the neutral line of the A.C. supply.
Patent GB-1222635-A (GB)
Title: Automatic clearance adjusting means for disc brake
Inventor: KIMATA SHIGEHIRO
IPC: F16D65/14
Filed: 1969-09-12
Abstract: 1,222,635. Disc brakes. ISUZU MOTORS Ltd. 12 Sept., 1969, No. 45206/69. Heading F2E. In a disc brake comprising a brake disc 1 having two brake pads 3 disposed, respectively, on opposite sides thereof, actuating means ineluding a piston 4 slidably mounted in a cylinder 5 with a brake pad mounted or adjacent the end of said piston, automatic clearance adjusting means are formed by said piston being provided on its periphery with a plurality of grooves 6 parallel to each other and perpendicular to the longitudinal axis of the piston and resilient means 7 engaged with any one of the grooves, the resilient means being securely fixed to said cylinder in order to return the piston when the brake is released and the arrangement being such that when the clearance C between the brake disc and the brake pads exceeds a predetermined limit due to wear of the brake pads the resilient means is moved into engagement with the next groove adjacent the groove originally engaged by the resilient means, so that the piston is advanced towards the disc by one pitch of the grooves to thereby keep the clearance within a predetermined limit. The grooves may be annular as shown, or in the form of circumferentially spaced, longitudinal sets of grooves, and the resilient means may comprise an annular plate 20 with or without radial slits 21 or notches at the inner periphery thereof, an annular plate divided into two or more segments, or leaf-spring tongues.
Patent GB-1326785-A (GB)
Title: Method for separating citric acid
IPC: C07C51/487
Filed: 1970-09-24
Abstract: 1326785 Citric acid TAKEDA YAKUHIN KOGYO KK 24 Sept 1970 [25 Sept 1969] 45520/70. Heading C2C Citric acid is separated from an aqueous solution containing water soluble salts of citric acid and (+)-isocitric acid by adding an inorganic calcium compound in an amount of 0À4 to 0À8 equivalent relative to the citric acid and recovering the precipitated tricalcium citrate. Calcium hydroxide, quicklime, calcium carbonate or chloride may be the compounds added and free nitric acid is obtained by treating the citrate with sulphuric acid. Examples describe the preparation of aqueous mixtures by fermentation followed by the preparation of the tricalcium salt. (+)-Isocitric acid is recovered from the mother liquor by addition of excess inorganic calcium salt, to precipitate tricalcium (+)-isocitrate.
Patent GB-990778-A (GB)
Title: Removal of nitric oxide from industrial gases
IPC: C10K1/18
Filed: 1963-11-20
Abstract: The process of the parent Specification for the removal of NO from industrial gases is modified to apply to industrial gases also containing HCN as impurity, for example cracking gases, producer gas and coke-oven gases and comprises maintaining in the gas mixture, which is to be subjected to compression, an amount of unsaturated hydrocarbon such that the molar ratio between such hydrocarbon and the HCN content of the gas mixture is at least 4: 1. Cyclopentadiene is the preferred hydrocarbon; the content of the latter in the gas mixture is preferably at least 1.5 g./m.3 N.T.P.  The HCN content in the mixture is preferably reduced to less than 500 mg./m.3 N.T.P. before the NO is removed, for instance by means of a wet gas washing with a soda solution and/or by means of a dry gas purification with ferruginous earth.
Patent GB-902859-A (GB)
Title: Improvements in and relating to automatic compressed air brakes
IPC: B60T15/54
Filed: 1958-07-24
Abstract: 902,859. Fluid-pressure brakes. VERWALTUNGSGESELLSCHAFT DER WERKZEUGMACHINENFABRIK OERLIKON. July 24, 1958 [July 26, 1957], No. 46416/61. Divided out of 902,858. Class 103 (1). The construction and operation of an automatic compressed air brake is the same as that described in Specification 902,858, and the claim of the present invention relates to a latch member formed by stem 41 for holding a stem 19, forming an actuating member for different valves, in the position shown in Fig. 2, when the pressure in the chamber 44 and brake pipe 2 falls below a predetermined value.
Patent GB-1248614-A (GB)
Title: Apparatus for the conveyance of cohesive particulate material
Inventor: FLAIN ROBERT JAMES
IPC: B65G53/00
Filed: 1968-10-02
Abstract: 1,248,614. Pneumatic conveyers. NATIONAL RESEARCH DEVELOPMENT CORP. 1 Oct., 1969 [2 Oct., 1968], No. 46814/68. Heading B8A. Cohesive particulate material is transferred from a storage hopper 1 along a delivery pipe 7 by applying pressurized air above the material in the hopper, introducing pressurized air into the material at a point 13 adjacent the hopper exit 5 and intermittently introducing pressurised air into the material flow in the pipe 7 at a point 6 to separate the material therein into discrete plugs having air filled spaces therebetween. The air flow rates to the upper part of the hopper and the points 13, 6 are controlled by regulators 14, 15, 16 in the supply lines from a pressure air source 8. A solenoid valve 20 is intermittently actuated by an electric pulse generator 21 to control the intermittent air supply to the point 6 which comprises an air jacket surrounding a porous sleeve forming the inner surface of the pipe 7 at point 6.
Patent GB-1216991-A (GB)
Title: Improvements in or relating to closed containers for foodstuffs and like perishable goods
Inventor: GEAKE THOMAS HENRY
IPC: B65D81/34
Filed: 1967-10-17
Abstract: 1,216,991. Opening containers; packages. STAR ALUMINIUM CO. Ltd. 15 Oct., 1968 [17 Oct., 1967], No.47205/67. Headings B8C and B8D. A container (10), Fig. 1 (not shown), e.g. dish shaped, is closed by a multilayered cover 11, at least one, but not all of the layers having two non-intersecting lines of perforations to allow opening of the container by means of a grip tag 17 which has cut-away portions to facilitate initial tearing action. The cover may comprise a top layer of cardboard bonded to aluminium foil, polythene, proofed paper or cellulose and may be fixed to the container by crimping, stitching, heat sealing or cold seal adhesive. The tag 17 may be bent inwardly over the cover and retained in position by a crimped edge. In a modification, the cover comprises a single sheet of perforated cardboard having strips of foil bonded solely underneath the perforations, the remainder of the cover underside being coated with paraffin wax.
Patent GB-1544027-A (GB)
Title: Agricultural vehicle
IPC: A01C3/06
Filed: 1977-11-15
Abstract: Provided in the loading truck at the end of the loading surface are two metering drums (15, 22) which are arranged vertically one above the other and which are driven in the same direction. A switching rake (1) is arranged in front of the lower metering drum (15) and is coupled to a switching device (8, 10). If the pressure of the conveyed crop exceeds the force of the spring (18) exerting load on the switching rake (1), the switching rake (1) and switching lever (8) are pivoted rearwards, the drive being switched off via the connecting rod (10). The loaded crop consequently cannot be pressed against the metering drums (15, 22); a blockage of the metering drums (15, 22) is thus prevented. <IMAGE>
Patent GB-1077130-A (GB)
Title: Control apparatus,particularly for tape transport
Inventor: MILLER ROBERT ALAN
IPC: H02P3/04
Filed: 1964-11-27
Abstract: 1,077,130. Control of A.C. motors; actuation of switches. WESTERN ELECTRIC CO. Inc. Nov. 27, 1964 [Nov. 29, 1963], No. 48263/64. Headings H2B and H2J. The capstan in a magnetic tape transport is driven by a three-phase induction motor which is dynamically braked by transposing two phases of the supply, which are re-connected via series resistors, reverse rotation being stopped by a direction-sensitive device which disconnects the motor and has a friction braking action. The device comprises a cam 324 pivoted at 315 in rubbing engagement with a cork surface 303 on a disc on the motor shaft. Clockwise rotation keeps the cam against an adjustable stop 312 and contacts ST6 closed. Anticlockwise motion rotates the cam away from the stop, allowing the contacts to open and braking the motor by the wedging action due to the cam profile having an increasing radius r 1  ... r 3 . The motor is brought to rest within a few degrees of reverse rotation. The assembly is carried by a bracket pivoted at 320 with spring loading 323. The cam resets itself in the clockwise running condition shown due to the resilience of the cork 303. The capstan motor has 24 and 4 pole windings for two-speed operation. A three-phase take-up reel motor is also disconnected when contacts ST6 open; switching is effected by relays which may be remotely controlled.
Patent GB-1286887-A (GB)
Title: Apparatus for determining corneal contour
Inventor: TOWNSLEY MALCOLM GEORGE
IPC: A61B3/107
Filed: 1970-10-12
Abstract: 1286887 Corneal measurement WESLEYJESSEN Inc 12 Oct 1970 48376/70 Heading G2J An apparatus for measuring corneal contour shines rings of light upon the cornea, photographs the reflected image so that the image may be compared with that of a perfect sphere and any deviation used to calculate the contour of the cornea. A housing 82 mounts a fluorescent tube 80, an electronic flash-tube 122, a camera lens 98, a polaroid camera 120 an eye-piece 100 with reflex mirrors 106, 108 and a target structure 10. The structure 10 comprises two shells 38, 40 which are interiorly coated with reflective material except at areas 86, 88, 90, 54, 56, and the frushoconical end (76) of the shell 40. These areas are arranged to direct concentric pans of rings of light on to the cornea as in Fig.10 (not shown). The patients chin is placed upon an adjustable rest 14 and his forhead against a rest 16. The rest 14 is adjusted to centre the rings of light upon the cornea and the device is focused by moving the housing 82 relative to the patient by means of a screwed rod 124 and ball joint 130 which permits the housing to move on a base 12. The reflex mirror 108 has an aperture 107 which permits light from the tube 80 to be reflected via the mirror 106 to a cross wire 99 which enables the patient to focus his eye and also, when reflected back from the cornea, enables split image focusing to be obtained in the eye-piece 100. The shell 38 also has three small apertures 176 which direct spots of light on to the cornea which appear as spots (170), (172), Fig.11 (not shown), which enables the photograph to be oriented with respect to the cornea. Movement of the mirror 106 upon taking the photograph switches off the tube 80 and illuminates the flash-tube 122.
Patent GB-1410187-A (GB)
Title: Flameproofed styrene polymers
IPC: C08F259/00
Filed: 1972-10-20
Abstract: 1410187 Flameproof polymer compositions, their production and expendable compositions BAYER AG 20 Oct 1972 [20 Oct 1971] 48399/72 Headings C3P and C3C A flame-proofed polymer is produced by a process in which 1-40 wt. per cent (based on the total mixture) of a copolymer of vinyl chloride and ethylene containing 5-20 wt. per cent of ethylene units and having an intrinsic viscosity in cyclohexane at 25‹ C. of from 0.2 to 1.5 dl./g., up to 50 wt. per cent of the vinyl chloride being optionally replaced by a copolymerizable monomer, is dissolved or swelled in 60-99 wt. per cent (based on the total mixture) of styrene or a mixture of styrene and up to 50 wt. per cent (based on the styrene) of a copolymerizable monomer, and the styrene or styrene/copolymerizable monomer mixture is polymerized. The invention also comprises a novel flameproofed polymer which comprises a copolymer of styrene with up to 50 wt. per cent (based on the styrene) of a copolymerizable monomer, and from 1-40 wt. per cent based on the polymer mixture, of a copolymer of vinyl chloride and ethylene having an ethylene content and viscosity as defined above, and wherein up to 50 wt. per cent of the vinyl chloride has been replaced by a copolymerizable monomer. In the example, styrene alone, and copoly- (ethylene/vinyl chloride) are used, the polymerization being in aqueous suspension. Suitable comonomers to replace up to 50 wt. per cent of the vinyl chloride are, vinyl acetate, allyl acetate, propylene, vinyl laurate or vinyl stearate. Suitable comonomers for the styrene are alpha-methyl styrene, a nuclear halogenated styrene, p-t-butyl styrene, acrylonitrile, methacrylonitrile or a C 1-8  ester of acrylic or methacrylic acid. None of these are exemplified. An expanding agent in an amount of 3-15 wt. per cent (based on the polymer/monomer starting mixture or the total polymer after polymerization), such as methane, ethane, ethylene, propane, butane, pentane, neopentane, hexane, methylene chloride, cyclohexane, dichlorodifluoromethane or trifluorotrichloroethane, a sulphohydrazide or an azodinitrile; and pore regulators such as sodium bicarbonate, pyrogenic silica or boric acid, may also be present. Those in italic were used in the example.
Patent GB-1520010-A (GB)
Title: Mobile radar apparatus
IPC: G01S7/22
Filed: 1975-11-26
Abstract: 1520010 Radar displays LEHMKUHL AS 26 Nov 1975 48549/75 Heading H4D A digital device for producing, on a shipborne (for example) P.P.I. radar display, a bearing line in a desired direction, comprises a counter 11 and a counter 12 the outputs from which feed a comparator 13 such that when the count in counter 11 reaches the same value as the value of the preset count in counter 12, the units of which counts correspond to the 360 degrees of the compass, and the count in the counter 12 corresponds to the bearing of the desired bearing line. Counter 11 is triggered to start counting when the antenna bearing is in the straight ahead position of the ship, from the count value corresponding to the reference direction provided by the ship's gyrocompass. A signal so produced in comparator 13 is fed to unit 14 which controls the radar display to display the bearing line, in the desired direction. (For figure see next page)
Patent GB-1195964-A (GB)
Title: Fan.
Inventor: ELLINGER JOHN HENRY
IPC: F01D5/02
Filed: 1966-12-05
Abstract: 1,195,964. Jet propulsion plant; rotors ROLLS - ROYCE Ltd. Feb.22, 1968 [Dec. 5, 1966], No. 48910/67. Divided out of 1, 195, 961. Headings F1J and F1T. A fan comprises substantially radially extending inner blade parts mounted from a shaft, a blade ring coaxial with the shaft and connected to the tips of the inner blade parts and substantially radially extending variable pitch outer blade parts mounted from the blade ring. The Specification describes in greater detail the blade rings 15, 16 of the gas turbine engine ducted fan disclosed in Specification 1,195, 961. The fan comprises outer variable pitch blade parts (2) Figs. 1, 2 (not shown), mounted on a ring 15 connected to the tips of inner non-adjustable blade parts 1 mounted on a ring 16 driven by a shaft 18. The ring 15, Fig. 3 is of H cross-section having circumferentially extending side flanges 12 connected by a web 13. Angularly spaced journals 7 receive the roots (4) of the outer blade parts (2) with freedom for pitch adjustment. Webs 10, 50 and 51 stiffen the ring 15, webs 10 incorporating bearings for the worm gears (9a) of the pitch adjusting mechanism. Outer 13a and inner cover plates box in the H- section. The connection between ring 15 and the tip of each inner blade part 1 is radially resilient to reduce stresses and comprises, Fig. 4, a boxsection 14 formed by slightly flexible walls 54, 55 attached to the blade part 1 and to an axially extending flange 53 of a channel-section member 57, the latter being attached to the inner surface of ring 15. The box-section 14 may be filled with synthetic rubber. The ring 16, Fig. 5 is of hollow box-section and supports each blade part 1 by shrink-fitting in an axial dovetail groove. The radially extending sides of the ring 16 are tapered to reduce stresses at the interface 17 with the drive shaft 18. The fan may be made of metal or plastics material, in the former case the blade parts 2 being hollow.
Patent GB-1085317-A (GB)
Title: Improvements in casement windows
IPC: E06B3/50
Filed: 1964-12-04
Abstract: 1,085,317. Casement windows. QUALITY PATENTS (PROPRIETORY) Ltd. Dec. 4, 1964 [Dec. 30, 1963], No. 49333/64. Heading E2F. A casement window comprises inner and outer metal or wood frames 12 and 11 joined by a pair of rigid pivoted arms 13 and 14 at at the bottom of the window with a similar pair of arms at the top, the arms fitting in the gap between the frames when the inner frame 12 is closed. The arm 13 is pivoted to a bracket 16 secured outside the inner edge 17 of frame 12 when it is in the closed position, and is fitted with a nut 23 so that the frame 12 may be held in any desired open position. A catch 24 holds the frame closed. The overlapping edge 21 of the frame 12 covers the gap between the frames and makes the casement weatherproof. In Fig. 3 (not shown), the end of arm 13 has its pivot accommodated in a slot in a rail 25.
Patent GB-1092879-A (GB)
Title: Photographic camera with flashlight contacts
Inventor: NOACK ROLF
IPC: G03B9/70
Filed: 1965-11-22
Abstract: 1,092,879. Photographic cameras with flashlight contacts. PENTACON DRESDEN KAMERA-UND KINOWERKE VEB. Nov.22, 1965, No. 49428/ 65. Heading G2A. In a single lens reflex camera having a mirror 2, a pre-ignition contact 3 and an X-contact 4 are connected in series with flashlamp 11 and battery 10. The contact 3 is closed by an arm 5 upon tilting of the mirror out of the light path to the viewfinder. The X-contact 4 is closed by a projection 6a of a shutter blade 6. The contact 4 may be closed manually by a lever 8 settable to marks F (pre-ignition) and X.