baber/WOPTO huggingface dataset:
Patent GB-2030720-A (GB)
Title: Gust Host Liquid Crystal Display
IPC: G02F1/1335
Filed: 1979-06-19
Abstract: The molecular alignment in display regions 33 of a dichroic gust- host liquid crystal display cell 25-34 differs from that in other regions such that in the unsuited state regions 33 absorb light linearly polarised in a direction a as transmitted by an adjacent polariser 24 of constrast with other areas of the cell. The liquid crystal (nematic, but may contain optically active material) has positive dielectric anisotropy so that a field E between associated electrodes 29, 30 destroys the contrast; permanent display areas may have no electrodes, and further display regions may be such as to require activation to produce contrast. In both embodiments, areas of the cell plate 25 adjacent the polariser corresponding to regions 33 produce parallel homogeneous alignment extending parallel to direction a. In all other areas plates 25 and 26 both produce parallel homogeneous alignment extending at 90 DEG  to direction a (regions 33 have a twist structure, as shown), or both produce homotropic alignment. <IMAGE>
Patent GB-2059163-A (GB)
Title: Radar reflector
IPC: H01Q15/18
Filed: 1979-07-17
Abstract: A holder for a radar reflector comprises a pair of location members or plates (20) and a distance piece (21) for spacing them apart so that a radar reflector assembly (1) can be received and retentively located between the location plates (20). Means (23) such as wire loops (25) connected to end caps (24) retain the plates (20) and distance piece (2) together and provide slinging or suspension attachment of the holder (2, 20) and radar reflector assembly (1) held thereby. <IMAGE>
Patent GB-2029714-A (GB)
Title: Tetrahedral flight vehicle
IPC: A63H27/00
Filed: 1979-08-31
Abstract: The tetrahedral flight vehicle possesses a three dimensional geometric shape based on an irregular tetrahedron. The longest dimension of the said shape is aligned with the direction of flight and the foremost extremity is that which encloses the smallest included angle when seen in plane. Four plane triangular flight surfaces, are conjoined to form the said tetrahedral shape, and maintain the vehicle in stable and sustained flight. When in flight, the vehicle presents an undesirable surface, which meets the airflow at a positive angle of attack. The two upper surfaces meet the airflow at a negative angle of attack, which is marginally less in magnitude than the aforesaid positive angle of attack. The resolved components of force, perpendicular to the direction of flight, produce a net upthrust resulting in lift. Viewed in transverse section, the triangular juxtaposition of flight surfaces induces stability. <IMAGE>
Patent GB-2030503-A (GB)
Title: Transfer of toxic and radioactive materials to and from a work enclosure
IPC: G21F7/005
Filed: 1979-09-05
Abstract: Apparatus for transfer of toxic and radioactive materials between a work enclosure, e.g. a glove box, and a container for storing and transporting the materials comprises a "double- cover" through which materials are moved. A port in the enclosure is closed by a first cover 10 and the container 15 is closed by a second cover 16. During transfer, the covers 10, 16 are connected together and the space between the covers is swept by an air stream supplied by a pipe 43 to prevent ingress and deposition of toxic or radioactive material on the facing surfaces of the cover which are subsequently exposed to the environment on separation of the covers. <IMAGE>
Patent GB-2033587-A (GB)
Title: Temperature-sensing system
IPC: H05B6/80
Filed: 1979-09-11
Abstract: A temperature-sensing assembly adapted for a cooking apparatus such as a microwave oven, comprises a communication unit and a sensing probe 60. The communication unit provides electro-magnetic waves in an oven cavity. Probe 60 has no power source. It selects a particular frequency of the electromagnetic waves. It contains an oscillator element resonance frequencies of which depend on the surrounding temperature. The communication unit further receives and detects the particular frequency of the electromagnetic waves defined by the selecting means. In a specific form, the communication unit provides electromagnetic waves the frequencies of which vary from time slot to time slot. The oscillator element may be composed of crystal, ceramic, or the like. The resonance frequencies of the oscillator element change due to variation in its number of proper vibrations dependent on the surrounding temperature. <IMAGE>
Patent GB-2059730-A (GB)
Title: Deformable heating unit
IPC: H05B3/34
Filed: 1979-09-18
Abstract: A deformable heating unit comprises insulated resistance wire which is configured into a predetermined path, such as a serpentine path, maintained only by clips 5. Each clip is in the form of a strip having an open loop at each end to receive the insulated wire, the loops being closed by hand or by a compressive tool. A jib may be used in making a unit in a serpentine configuration, the jig including a series of ribs 13 with a movable end piece 10 at the end of each rib for adjusting the length of the configured unit. The heating units are hand deformable after manufacture to increase or decrease their length by a limited amount. A connector for reducing heat conduction from the heating unit to a conductor of a current supply, may be used, the end portion of the resistance wire being covered with silver solder and secured together with a copper conductor in a crimped ferrule. <IMAGE>
Patent GB-2034110-A (GB)
Title: Headlight having metallized reflector coating
IPC: H01K9/08
Filed: 1979-10-29
Abstract: A filament-containing headlight has a glass reflector (1) having a metallic reflector coating (6) thereon. The reflector has bosses (8) having holes therethrough to accommodate lead-in wires (4) for the filament. The area (7) around the boss region is kept devoid of reflecting coating. <IMAGE>
Patent GB-2041537-A (GB)
Title: Improvements in or relating to NMR imaging systems
IPC: G01R33/48
Filed: 1980-01-03
Abstract: In a nuclear magnetic resonance imaging apparatus it has been proposed to excite resonance preferentially in a cross-sectional slice of a patient's body by applying a steady magnetic field and a field gradient pulse Gz in conjunction with a pulse of RF. Shapes of the RF pulse envelope are here proposed to reduce excitation outside the chosen slice. The RF envelope should be a unidirectional pulse of which both the rising and falling parts are monotonic curves lying between limits given by sin<3>t and sin <10>t curves, preferably sin<5>t. An acceptable curve may fall below sin<10>t in the skirts but should not change sign. Alternatively a unidirectional AF envelope with width less than that of the Gz pulse (e.g. of sin<2> theta  form) having rising and falling half heights, each of which occur within limits of 17% and 32% of the half height width of the Gz pulse from the centre of the Gz pulse and on opposite sides of that centre, may be used. <IMAGE>
Patent GB-2040360-A (GB)
Title: I.C. engine cold starting carburettor
IPC: F02M1/04
Filed: 1980-01-21
Abstract: A lever 56 which has its angular orientation controlled by an engine temperature responsive wax capsule 61 carries a peg 58 which projects into a recess in a plate 67 which is carried by two valves respectively controlling mixture and fuel, and a peg 59 which projects in front of the edge 70 of the plate 67. Closing movement of the valves in response to engine suction is limited by abutment of the edge 68 of the recess with the first peg 58 when the engine is very cold and by abutment of the edge 70 of the plate 67 with the second peg 59 during the later part of the engine warm-up period whereby permitted valve movement for a given engine temperature increase is greater below than above a certain engine temperature. <IMAGE>
Patent GB-2068261-A (GB)
Title: Electrical conductor wires insulated with varnish hardenable by ultraviolet radiation
IPC: H01B13/06
Filed: 1980-02-01
Abstract: In order to coat an electrical conductor, such as a heavy gauge wire, with successive layers of insulative varnish hardenable by ultraviolet radiation, there is provided, one above the other, a varnish coating device 8, a stripper-calibrating device 12, and a hardening chamber 16, with guide rollers 9 at the top and bottom. The hardening chamber 16 has at least one pair of ultraviolet emitters disposed transverse to the direction of movement of the conductor and reflectors disposed behind the emitters. The hardening chamber 16 is provided for the passage of cooling gas, such as air. <IMAGE>
Patent GB-2045335-A (GB)
Title: Releasable Garment Fasteners
IPC: A41F1/00
Filed: 1980-02-15
Abstract: The invention relates to a fastener of button or stud form which combines a magnetic arrangement with a mechanical latching arrangement. The fastener comprises a closing device (1), engageable with a fastening device (2), each of which is provided with a magnetic arrangement or is formed of a magnetic material. The closing device has an access opening (8) through which at least part of the fastening device can pass, and provision is made for lateral movement of the fastening device relative to the closing device; when any force is applied to the fastener the latter is provided with a hook type action to prevent opening. <IMAGE>
Patent GB-2044594-A (GB)
Title: A poultry cage divider
IPC: A01K31/17
Filed: 1980-03-18
Abstract: A poultry cage divider comprises a generally flat plastics moulding (10) with a plurality of edges (11A to 11D) at least one of which is provided with a plurality of projecting lugs (12X, 12Y) on each side, the mutually facing surfaces of the lugs being grooved, and at least one locking strip (13A to 13C) slidable endwise along the grooves in the lugs and adapted to leave a space between itself and the edge of the moulding. Three out of four edges are provided with lugs so that wire mesh panels (14A to 14C) can be secured as the top, back and bottom of a cage, and the divider is moulded with holes (23, 24, 50, 53), clips (45, 48) and recesses (34, 39), for the fitting of tubes (22, 41, 44, 47), bars (26, 27, 51, 54) and troughs (30), completing its structure at the front where the edge (11D) has no lugs, and providing for feed and water for the birds. <IMAGE>
Patent GB-2045992-A (GB)
Title: Modular Display Element
IPC: B65D33/00
Filed: 1980-03-26
Abstract: The element has tabs or lugs 20, 22, 26, 28 on opposite edges thereof, the lugs being adapted by means of slits 18, 24 to form flaps for interlocking with the tabs or lugs of another identical element whereby identical elements can be suspended one beneath another. The element can constitute a sleeve or pocket and, in a preferred form, is formed of two sheets 10, 12 at least one of which has an aperture or is transparent to expose a part of the displayed article to view. <IMAGE>
Patent GB-2079511-A (GB)
Title: Sound generator
IPC: E21F17/18
Filed: 1980-06-25
Abstract: A sound generator or audible warning device for incorporation in the pressurised water supply of a coal cutter, includes a water driven turbine the output shaft of which has a member having a ridge extending transversely of the axis of rotation fixed thereto and a diaphragm having a centrally mounted member including at least one groove also arranged transversely of the axis of the turbine shaft, whereby rotation of the turbine produces oscillations of the diaphragm resulting in sound production.
Patent GB-2056951-A (GB)
Title: Stacking trays
IPC: B65D5/00
Filed: 1980-08-15
Abstract: A stacking tray is formed from a blank of corrugated or solid fibre board and has a double thickness of material along each of two opposed sides (28), and an extra thickness of material over at least part of each of opposed end walls (20). The extra thickness is provided by lugs (30) on the sides (28) which overlie inner panels of the end walls (20). The lugs (30) have locking tabs (62) and locking detents (56) engageable respectively in base slots and angled slots (68) in the end walls (20). The tray further has stacking tabs defined by cuts 46 engageable in complementary spaces in the lower corners of another tray stacked thereon. <IMAGE>
Patent GB-2069375-A (GB)
Title: Solid-sleeve screw centrifuge
IPC: B04B1/20
Filed: 1980-12-10
Abstract: A solid-sleeve screw centrifuge comprises a cylindrical drum sleeve (1) and a screw conveyor (3), the drum sleeve being provided with openings (3) in the region at which the solid or heavier phase is extracted. <IMAGE>
Patent GB-2065823-A (GB)
Title: Flexible, multi-layer tubing
IPC: B29C53/30
Filed: 1980-12-16
Abstract: Flexible, multi-layer tubing 22 and a method of making same are provided wherein such tubing comprises inner and outer layers 5 and 10 of helically wrapped, polymerised strip material with overlapping convolutions of the respective layers bonded together, by for example heat fusing, and an intermediate layer 8 of helically wrapped metallic strip material. The intermediate metallic layer 8 separates completely the inner and outer layers 5 and 10 and provides a conductive path extending along the tubing. The multi-layer tubing may be helically corrugated. <IMAGE>
Patent GB-2068292-A (GB)
Title: A method and an apparatus for the removal of excess layers from building elements made of cured lightweight concrete
IPC: B28B11/12
Filed: 1981-01-20
Abstract: An apparatus (6) for the removal of an excess layer (4) from building elements (2) made of cured lightweight concrete comprises a front tool (9) having edges (10) which are located at a certain depth under the top surface of the excess layer (4) and a rear tool (11) having an edge (12) located at a somewhat greater depth under said surface. Hereby the excess layer is planed off from the element in two stages when the element (2) is fed through the apparatus (6), while securing a smooth and plain surface (18) on the finished element. (Fig. 3). The front tool consists of a plurality of cutting elements spread along a line, and the rear tool consists of one continuous blade. <IMAGE>
Patent GB-2092947-A (GB)
Title: A method of patch mending a veneer sheet
IPC: B26F1/40
Filed: 1981-02-18
Abstract: A method of mending a veneer sheet 1 having a defective portion is provided. An incomplete veneer sheet 1 and a sheet of mending material 2 are laid one on top of the other. The sheets are cut through by a single stroke of an annular cutting tool 4 such that the defective portion of the veneer sheet 1 is cut-out whereas a plug 2a having a same size and shape as the cut-out defective portion is cut from the sheet 2. The cut portions retained in the annular cutting tool 4 until the plug 2a is shifted into a plane in which the veneer sheet 1 extends. At the same time, the cutout defective portion 1a is routed out from the veneer sheet 1. Then, when the cutting tool 4 is removed from the sheets 1, 2 a mended veneer sheet 1 results. Another method is also provided. A plurality of plugs are cut-out from a sheet of mending material by repeatedly cutting through it by a single annular cutting tool. The cut-out plugs are retained in the annular tool. Then, an incomplete veneer sheet is cut through by the tool to cut-out a defective portion from the veneer sheet while the plugs retained in the tool pushed farther into it. However, a plug in contact with the cut-out defective portion is pushed toward the plane in which the veneer sheet extends. As a result, the defective portion is routed out. When the annular cutting tool is removed from the sheet, the mended veneer sheets results. This can be repeated until the plugs run out. <IMAGE>
Patent GB-2094937-A (GB)
Title: Valve with manual override
IPC: F16K31/11
Filed: 1981-03-12
Abstract: A gas cooker valve (1) has a solenoid-driven actuator (8) to selectively close or open the main channel (5) between gas inlet (3) and outlet (4). An auxiliary channel (9), unaffected by the condition of the actuator, is normally closed by a resilient pad (12) on a solid pad (13) fixed to a rod (14); however, the pads can be moved manually away from the auxiliary channel and then latched to permit gas to by-pass the main channel when closed, e.g. during a failure of the electricity supply. <IMAGE>
Patent GB-2075266-A (GB)
Title: Electromagnetic actuators
IPC: H01F7/16
Filed: 1981-03-13
Abstract: An electromagnetic device comprises an annular armature 16, an inner stator structure 10 defining outwardly extending pole pieces 11 and an outer stator structure 13 defining inwardly extending pole pieces 14, the armature being of generally tapering form. The stator structures each carry windings whereby when the winding on the outer stator structure is energised the armature will move in one direction and when the winding on the inner stator structure is energised the armature will move in the other direction. The stator structures are so disposed that the magnetic circuits in the armature for the flux produced by the inner and outer stator structures when the respective windings are energised, are displaced relative to each other. <IMAGE>
Patent GB-2098718-A (GB)
Title: Gas turbine fuel injector
IPC: F02C7/236
Filed: 1981-05-20
Abstract: In order to assist engine start-up at low temperatures and/or when using low grade fuels, an auxiliary flow from a separate compressor or the engine APU of air is supplied to airspray type fuel injectors through an air duct (56) to the main air passage (38) through an annular nozzle (58) and the shroud air passage (44) through nozzle (64). Swirl vanes (66) can be located in the nozzle (58) to enclose shear between the fuel and air and the air duct (56) can be upstream of the fuel duct (50) or the fuel and air ducts can be concentric to provide thermal insulation of the fuel duct. This arrangement avoids the need for a pressure jet pilot fuel nozzle. <IMAGE>
Patent GB-2079879-A (GB)
Title: Internal-shoe drum brake
IPC: F16D51/20
Filed: 1981-07-07
Abstract: The brake has shoes (11, 11') actuated at one pair of ends by a floating hydraulic cylinder (12) for service braking but actuated at their other pair of ends by a mechanical wedge expansion device (1) for parking. The device (1) has a wedge (17) acting between plungers (7, 7') which engage respectively the ends of the brake shoes (11, 11') through pressure pads (3) having hemicylindrical bracing projections (4), projecting from shoe boss (2). An adjusting device (13) with an eccentrically arranged stud (16) is provided (see Fig. 3, for details). <IMAGE>
Patent GB-2079488-A (GB)
Title: Interferometer for the shape control of convex surfaces of optical parts
IPC: G01B9/02
Filed: 1980-01-30
Abstract: An interferometer for the shape control of convex surfaces of optical parts comprises a monochromatic light source (1), and placed successively thereafter along the beam path, a focusing lens (3), a beam splitter (4), a compensator (5) and a lens system (6) the last surface (A) of which, along the beam path, has a standard concave spherical form, its centre of curvature being optically conjugated, by means of the compensator (5), with the rear focus (F1) of the focusing lens (3). After the lens system (6) along the beam path on its optical axis are placed successively an additional compensator (16), an additional beam splitter (17), an additional focusing lens (18), a system of mirrors (20, 2) for directing the beams from the monochromatic light source (1) to the additional focusing lens (18), the rear focus (F2) of which is optically conjugated, by means of the additional compensator (16), with the centre of curvature of the standard concave spherical surface (B) of the lens system (6), which surface is placed first along the beam path from the monochromatic light source (1) and which centre of curvature is different from that of the standard surface (A). The interferometer comprises further two systems (11, 19) for registration of interference patterns arising during the reflection of the light beams from the standard surfaces (A, B) of the lens system (6). The interferometer is intended preferably for shape controlling convex surfaces of optical parts of large (about 600 mm) diameters, for example the lenses of fast long focal-length photographic lenses.
Patent GB-2085194-A (GB)
Title: Automatic lock-positioning of foldable helicopter blades.
IPC: B64C27/50
Filed: 1981-10-01
Abstract: The foldable rotor blades (12) of a helicopter are automatically adjusted to pitch angles where they can be locked as a prerequisite to folding, by commands generated to cause trim actuators (39-41) to drive swash plate servos (17-19) to the correct positions, initially in response to stored trim references and eventually in response to the difference between stored swash plate servo positions and current servo positions (20-22). One embodiment uses values of servo positions (20-22), just before unlocking the blades upon re- spreading them, to store, in nonvolatile memory, deviations from nominal positions stored in read only memory, and generates trim references in a subsequent folding operation in response to integrated values to reduce actual position errors toward zero from desired positions indicated by the stored deviations. <IMAGE>
Patent GB-2083083-A (GB)
Title: Circular knitting machines
IPC: D04B15/94
Filed: 1981-03-12
Abstract: In a circular knitting machine a racking mechanism has an evenly cut rackwheel (1), cam means for imparting racking motions to pawl carrier (7, 8), a plurality of pawls (3, 4, 5, 6) mounted on each of the carriers (7, 8) for conjoint movement, masking means (12) mounted on the rackwheel (1) to prevent a pawl of said plurality of pawls (3, 4, 5, 6) from engaging a tooth of the rackwheel (1) during a racking motion and a first movable bluffing means (13) to prevent to prevent another of said plurality of pawls (3, 4, 5, 6) from engaging a tooth of the rackwheel (1).
Patent GB-2094245-A (GB)
Title: Steering linkage for motor vehicles
IPC: B62D7/00
Filed: 1982-02-10
Abstract: The steering linkage has tie rods 18, 18' arranged to transmit steering effort from a steering gear 19 to steering arms 17 connected to respective wheel carriers 14 for the steerable wheels 11. The steering arms incorporate hydraulic cylinders which, by the action of a hydraulic control system (63,64) increase the effective length of the steering arms (17) with increasing angle of steering lock of the steerable wheels (11). <IMAGE>
Patent GB-2115038-A (GB)
Title: Digging apparatus
Inventor: CLEMENTS HAROLD JOHN
IPC: E02F5/02
Filed: 1982-02-17
Abstract: Apparatus for digging rectangular holes, comprising a supporting structure (3) for resting on the ground, and power-driven recirculatory digging means (7) mounted on said supporting structure (3) for up and down movement, the effective digging area of said digging means (7) in operation comprising substantially only a substantially horizontal bottom run or runs of substantially rectangular outline shape, so that in operation a rectangular hole is dug. <IMAGE>
Patent GB-2097302-A (GB)
Title: Drilling rig
IPC: E21B15/04
Filed: 1982-02-26
Abstract: A drilling rig comprises a vehicle adapted to be mounted and to run on rails 12, said vehicle incorporating at least one support structure 15 upon which a drilling machine 17 is mounted, said support structure enabling the drilling machine to be adjusted for vertical height relative to the vehicle. <IMAGE>
Patent GB-2094971-A (GB)
Title: Method of igniting a coal-dust annular burner flame
IPC: F23Q9/00
Filed: 1982-03-09
Abstract: A method of igniting a coal-dust annular burner flame with an internal return flow region, wherein the ignition energy is introduced centrally into the internal return flow region of the coal-dust annular burner flame, the dust-laden air-dust weight ratio for the dust igniting flame amounting to 0.2-0.5, the dust-laden air-dust weight ratio for the main burner flame amounting to 1.5-2.0 and the dust igniting flame being operated with an air number of lambda =0.4-0.8 and drawing the additional stream of air necessary for the complete combustion from the leakage air of the main burner.