baber/WOPTO huggingface dataset:
Patent GB-2219130-A (GB)
Title: A high mobility semiconductor device
Inventor: BATTERSBY STEPHEN JOHN
IPC: H01L29/205
Filed: 1988-05-25
Abstract: A high mobility semiconductor device has a conduction channel region with conduction channel layers (2) bounded by barrier layers (3) of a different semiconductor material so that each conduction channel layer (2) forms a potential well for charge carriers of the one conductivity type by defining a first heterojunction (4) with the barrier layer (3) on which the conduction channel layer (2) is formed and a second heterojunction (5) with the barrier layer (3) formed on the conduction channel layer (2). A first subsidiary barrier layer (3f, 3c) doped with impurities characteristic of the one conductivity type is provided adjacent each second heterojunction (5) for providing free charge carriers of the one conductivity type in the conduction channel layers (2) at the second heterojunctions (5) and a second subsidiary barrier layer (3g) doped with impurities characteristic of the opposite conductivity type and sufficiently thin and lowly doped as to be fully depleted of free charge carriers at zero bias is provided between conduction channels layers (2) adjacent the first heterojunction (4) for inhibiting the provision of free charge carriers of the one conductivity type in a conduction channel layer (2) at the first heterojunction (4). <IMAGE>
Patent GB-2208716-A (GB)
Title: Speed and torque sensors
Inventor: MASOM RONALD ALFRED
IPC: G01D11/24
Filed: 1988-07-18
Abstract: A speed and torque sensor has a permanent magnet 15 and a pole piece 16 about which are wound together a torque coil 24 and two speed coils 22 and 23 identical with the torque coil. The coils and permanent magnet assembly are contained in an outer housing 12 together with resistors 26 and 27 connected in series with the respective speed coils 22 and 23. The resistance of the resistors 26 and 27 is approximately fifty times that of the speed coils 22 and 23 so that shorting of the output of a speed coil beyond the resistor does not substantially increase current drawn by the coil. A temperature sensor 35 in the housing 12 enables compensation for changes with temperature of the modulus of elasticity of the member subject to torque. As shown the latter is a shaft 1, a portion 2 of which carries magnetic sleeves 5, 6 having interdigitated teeth 7, 8 cooperating with the sensor. <IMAGE>
Patent GB-2221943-A (GB)
Title: Guard device
Inventor: CAMPBELL ROBIN WILLIAM
IPC: E06B7/36
Filed: 1988-08-19
Abstract: A guard device for preventing fingers being trapped in the hinge region of a door comprises an elongate strip preferably having a rigid and a flexible region and secured so that it acts to prevent finger entry into the gap between a door and door jamb, and flexes to follow the movement of the door as it is opened and closed. Securing by pressure sensitive adhesive is preferred for convenience and lack of damage caused to the jamb, when provision of a thin flexible region is needed. This flexibility is provided by reducing the thickness of the rigid material used to form the strip or by affixing a flexible plastics material hinge to the rigid guard region.
Patent GB-2225772-A (GB)
Title: Tape dispensers
Inventor: TAYLOR GERALD MAURICE
IPC: B65H35/00
Filed: 1988-10-15
Abstract: A dispenser for a reel (22) of adhesive tape enables a length of tape to be dispensed and severed from the reel without direct manual contact with the tape. An actuating mechanism which comprises a finger-operated knob (28), a pair of pivotable double-armed levers (24, 34) and a cutting device (42, 44) is displaceable between a first position in which the free end of the tape is presented at an aperture (18) for placement in contact with a receiving surface (48), and a second position which causes the tape to be cut and the new free end of the tape to be raised from the receiving surface (48). <IMAGE>
Patent GB-2212121-A (GB)
Title: Vehicle tyres
Inventor: ZHANG WEITAI
IPC: B60C7/12
Filed: 1988-11-10
Abstract: A non-inflatable tyre for a vehicle has air cells (26) distributed around its inner periphery. The air in these cells is at substantially atmospheric pressure and the cells all communicate with one another when the tyre is under a load below a predetermined load. This is achieved in that the tranverse partitions separating the cells (26) from one another are normally slightly spaced from the wheel rim. When the relevant portion of the tyre is deflected under load, the cells (26) are sealed off so that they act as cushions. The partitions between the cells (26) are made of a softer rubber than an inner layer of the tyre which is itself of a softer rubber than the outer layer of the tyre. The partitions and the associated cells may be formed in the tyre using a vulcanising machine having radially extendible and retractable cell-forming dies or the partitions and cells may be provided in a skeleton, Fig 5, which is installed in a tyre before vulcanisation. <IMAGE>
Patent GB-2225616-A (GB)
Title: Power generating system including gearing allowing constant generator torque
Inventor: HENDERSON GEOFFREY MORGAN
IPC: F16H3/72
Filed: 1988-11-30
Abstract: A power generating system in which a fluid driven turbine drives an alternating current generator comprises a rotor to be driven by a fluid and a transmission assembly for coupling the rotor to an electrical generator. The transmission assembly includes a hydraulic pump (16) which is a positive displacement hydraulic pump which has a linear relationship between fluid pressure and output torque. The pump is connected in a hydraulic circuit which includes a valve (22) which in a first state prevents flow of operating fluid from the pump through the hydraulic circuit and in a second state permits such flow. With the valve in the first state, torque is transmitted from the rotor input to the generator with substantially zero slip and with the valve in the second state, the transmission assembly slips so as to permit the rotation speed of the rotor to increase relative to the rotational speed of the generator so as to maintain a substantially constant torque at the generator. A wind turbine preferably drives a shaft (6) through fixed ratio step-up gearing (3). This shaft (6) drives an annulus (13) of a second set of epicyclic gearing and the hydraulic pump (16). In a second embodiment the second set of epicyclic gearing is omitted and the pump is mounted integrally within a rotating fluid reservoir. The pump station is connected to the output shaft and the rotor to the shaft from the step-up gearing. <IMAGE>
Patent GB-2213124-A (GB)
Title: Transportation and storage arrangement
Inventor: CLARK RONALD
IPC: B65B69/00
Filed: 1988-12-05
Abstract: A card for carrying a plurality of wire thread inserts 18 has a series of rows of apertures 12 whose diameter is such that an insert can be press fitted therein to project from the front and rear of the sheet. There is provided also an assembly for holding a sheet of inserts as the inserts are removed by a mandrel 24, comprising a card carrier 20 having recesses 22 to accommodate inserts projecting from the rear of the sheet and a stripper bar 26 to hold down the sheet as an insert is pulled therefrom. <IMAGE>
Patent GB-886899-A (GB)
Abstract: 886,899. Controlling burners. LANDIS & GYR A.G. Nov. 2, 1960 [Nov. 3, 1959], No. 37693/60. Class 75(1) [Also in Group XL(b)] An automatic control system for an oil burner (not shown) includes a thermostatic switch 72 responsive to a room heated by the burner, a flame watching relay 24 and a cam roller (not shown) for operating electric contacts 12 . . . 20, the cam roller being rotated by a bimetal element 1 heated by a resistance 67 and having two cam discs for each contact 12 . . . 20. One set of cam discs are in operation when the cam roller rotates in one direction and the other set is in operation when the cam roller rotates in the opposite direction. The cam roller rotates on a shaft 10 and is axially displaced thereon, to bring one or other of the two sets of cam discs into operation, either by the roller being engaged by teeth 28, 29 on the armature of the flame watching relay 24 or by a pin 55 on the contact 19 engaging an oblique ledge on one of the cam discs or by the contact 15 engaging an oblique ledge on another of the cam discs. When heat is required thermostat 72 closes its contacts to connect the mains voltage 73, 74 across a series resistance 68 and the heater resistance 67 of the bimetal element 1. The cam roller is therefore rotated and closes contacts 13, 14 to energize an ignition transformer 69 and closes contacts 12, 13 to short-circuit the series resistance 68. The bimetal element is thus more rapidly heated. Later, contacts 19, 20 close to switch on an oil burner motor 70. If a flame is produced relay 24 is energized and the teeth 28, 29 on its armature 26 displace the cam roller axially. In consequence contacts 12, 13 and 16, 17 are opened and contacts 17, 18 are closed. The heater resistance 67 is now fed through the burner motor contacts 19, 20 and the series resistance 68 is again in circuit. The bimetal element 1 thus cools until it reaches an equilibrium temperature and in cooling it rotates the cam roller in the opposite direction. After a short interval contacts 13, 14 open to de-energize the ignition transformer 69. If the flame fails armature 26 drops out and a finger 31 thereon unlocks contact 20 which therefore switches off the motor 70 and the heater 67. The bimetal element again cools and rotates the cam roller so that the pin 55 on contact 19 engages the oblique ledge on the cam roller and displaces the latter axially. Consequently contacts 17, 18 open and contacts 16, 17 close and the starting sequence can begin if the thermostat 72 is closed. If ignition is not successful no axial displacement of the cam roller takes place and contacts 15, 22 open to de-energize the motor 70 and heater 67 and contacts 15, 21 close to energize a warning lamp 71. The bimetal element therefore cools and the cam roller rotates and the contact 15 engages a ledge on the cam roller to move the latter axially. On further rotation the contact 19 engages the roller to return it axially and the roller comes to rest with all the contacts in the starting position except the contact 15. The contact 15 is reset in its starting position by means of a push button 33.
Patent GB-2227950-A (GB)
Title: Model aeroplane
IPC: A63H27/01
Filed: 1989-02-01
Abstract: A catapult-launched swing wing model glider is catapulted into the air with its wings swept back (Figure 1, not shown). On reaching its apogee it tilts forward and a ball (12) rolls forward inside a tube (13) flicking a lever (14) which releases a catch (10). This allows wings (15 and 16) to spring out under tension from elastic or spring (11). The glider can be preset using a wing flap to circle during descent. When the glider lands it is reset by pointing the nose upwards and pulling one of the wings back to the swept-back position.   <IMAGE>
Patent GB-2223903-A (GB)
Title: Local oscillator circuit
Inventor: SUDA TORU
IPC: H03B5/12
Filed: 1989-02-03
Abstract: A local oscillating circuit comprises the resonance circuit (3) provided with a resonance varactor diode (D3) for receiving a local oscillating frequency control voltage (VTU) and changing its capacitance value in response to said voltage. An amplifying circuit (1) is connected to the output of the resonance circuit (3). A feedback circuit (2) has a feedback varactor diode (D2) for feeding back the output of said amplifying circuit (1) to said resonance circuit (3). An AFT circuit (4) is provided with the fine tuning varactor diode (D1) which is coupled to the load capacitor (C3) of the amplifying circuit (1), thereby stabilizing the local frequency displacement due to the automatic fine tuning voltage. <IMAGE>
Patent GB-2218641-A (GB)
Title: Tennis racket handle pallet
Inventor: JANES RICHARD
IPC: A63B49/08
Filed: 1989-05-15
Abstract: An improved tennis racket handle pallet 14 formed of polymeric material has durometer hardness such as to render such handle pallet sufficiently soft for absorbing shocks and vibrations but not so soft as to preclude racket indexing, the handle pallet being of a sufficiently high density so as to minimize the need for employing additional weights to maintain proper racket balance. The racket frame 16 may be formed of aluminium or graphite with glass fibre or ceramics and the pallet of moulded urethane. The handle may be of octagonal cross-section and covered with leather or the like 36. <IMAGE>
Patent GB-2217436-A (GB)
Title: Improvements to valves in gas bottles
Inventor: LARSSON JOHN
IPC: F17C13/04
Filed: 1988-10-07
Abstract: An arrangement fo realizing a lower opening torque than closing torque in valves for gas bottles. A so-callled box nut is disposed in the valve housing. Between the wheel spindle (8) and the box nut (11), there is disposed an inner sleeve-shaped member (12) provided with inner and outer threads. The inner threads being disposed to be in mesh with the threads on the wheel spindle (8) and the outer threads in mesh with the threads of the box nut (11). During the first phase of the rotational movement of the wheel, the wheel spindle (8) turns in the inner threads in the inner sleeve-shaped member (12), whereafter the wheel spindle (8) together with the inner sleeve-shaped member (12) turns in the box nut (11). The ratio between the pitch of the inner and the outer threads in the inner sleeve-shaped member (12) is such that the opening torque lies in the interval of 30-70 % of the closing torque.
Patent GB-2223781-A (GB)
Title: Large bore retrievable well safety valve
Inventor: PRINGLE RONALD EARL
IPC: E21B34/00
Filed: 1989-08-29
Abstract: A retrievable well subsurface safety valve 10 has a control fluid inlet passageway 92. The valve 10 is rotationally oriented to connect the flow control passageway 92 to a port 38 in the well conduit. A landing nipple 11 includes the port 38 for receiving hydraulic control fluid, a latching recess 72 for latching the valve housing, and orientation mechanism 92, 74 for rotating the safety valve 10 relative to the port 38. <IMAGE>
Patent GB-2227489-A (GB)
Title: Cyclosporins extracted from Tolypocladium varium
Inventor: JEKKEL ANTONIA
IPC: C07D501/00
Filed: 1989-12-20
Abstract: A microbial process for the production of immunosuppressive cyclosporin anti-biotic complex or of its components, cyclosporin A, cyclosporin B and cyclosporin C, by the aerobic fermentation of a filamentous fungus strain biosynthesizing the above antibiotic(s) in a nutrient medium containing utilizable carbon and nitrogen sources as well as mineral salts, and by isolating the products formed is described, which comprises culturing a strain of Tolypocladium varium fungus species producing the cyclosporin antibiotic complex, preferably Tolypocladium varium sp. nov. CY/93, deposited at the National Collection of Agricultural and Industrial Microorganisms, Budapest, Hungary under the number NCAIM(P)F 001005, on a nutrient medium containing carbon sources, organic and inorganic nitrogen sources as well as mineral salts, under aerobic conditions, at 25 to 30 DEG C, and, if desired, isolating and purifying the cyclosporin antibiotic complex or its components produced.
Patent GB-2239415-A (GB)
Title: Torque transfer device
Inventor: JOHNSON RICHARD ANTHONY
IPC: B25B17/00
Filed: 1989-12-23
Abstract: A torque transfer device comprising 2 rotatable heads located one at each opposite end region of a generally elongate arm; with transmission means, housed within the arm, operatively linking the heads such that rotation of one head causes rotation of the other; and with one head - the driven head in use - being adapted to accept and to rotate the shank of a socket whilst the other head - the driving head in use - is adapted to accept and to be rotated by the output end of a drive member such as a socket wrench, a power drill, or the like. Preferably the transmission means comprises a chain-and-sprocket transmission whose sprockets are fixed to respective ones of the rotatable heads. Toothed belt and bevel-and-pinion shaft drives are also disclosed. <IMAGE>
Patent GB-2230570-A (GB)
Title: Gaiters
Inventor: SHEPHERD MICHAEL CHRISTOPHER
IPC: F16D3/84
Filed: 1990-03-28
Abstract: A gaiter (10) for fitting about a constant velocity joint has a narrow neck part (12) at one end, a bulbous central section (14) and a flange (16) at its other end. The gaiter is split longitudinally and flanges (22) along the opposed edges present flat faces (24) that are adhered together to complete the gaiter after fitting. <IMAGE>
Patent GB-2232866-A (GB)
Title: A star wheel and a star wheel assembly for an agricultural machine
Inventor: WESTON DAVID BOOTH
IPC: A01D17/06
Filed: 1990-05-18
Abstract: The star wheel has outwardly-extending resiliently-deformable fingers 2 of such a size and number that when a plurality of such star wheels are arranged on a rotatable member and are mounted adjacent a further rotatable member in spaced parallel relationship therewith small root crop down to substantially 2cm width is carried over by the fingers of the rotating star wheels and not extracted. <IMAGE>
Patent GB-2245446-A (GB)
Title: Channelised bearing processor
Inventor: GRAHAM STEPHEN PAUL
IPC: G01S3/04
Filed: 1990-06-20
Abstract: A channelised bearing processor comprises a channelised receiver consisting of a plurality of i.f. receivers (34 to 42) covering contiguous parts of a predetermined frequency range. Each of the receivers (34 to 42) is connected to a respective, continuously energised local oscillator (35 to 43). A plurality of direction finding antennas (10 to 15) are coupled to respective receiving channels for producing an amplitude signal. Each receiving channel includes a tunable i.f. receiver (24A to 24F) having an input (26A to 26F) for a local oscillator signal. A local oscillator selector (50) is responsive to an output from one of the channelised receivers (34 to 42) to connect the local oscillator (35 to 43) connected to that one of the channelised receivers (34 to 42) to the local oscillator signal inputs (26A to 26F) of the tunable i.f. receivers (24A to 24F) in the receiving channels.
Patent GB-2232986-A (GB)
Title: Fire-retardant moulding compounds
Inventor: CROMPTON GEOFFREY
IPC: C08K3/00
Filed: 1990-06-26
Abstract: A fire-retardant moulded component is prepared from a dough moulding compound comprising (i) a resin, (ii) one or more frits capable of melting when heated in a fire situation and (iii) glass or ceramic fibres or ceramic powder. The dough moulding compound preferably contains two or more frits melting progressively when heated in a fire situation.
Patent GB-2236925-A (GB)
Title: Measuring rotational position of missile
Inventor: LEUS HANS-JOACHIM
IPC: F41G7/30
Filed: 1990-07-19
Abstract: A sensor for measuring the rotational position of a ballistic projectile rotating about its longitudinal axis using the plane of polarisation of a guide beam 6 is described. A magnetic field sensor (10) being provided with a circuit (11) providing time gating reference impulses (34) which define an above or below relative position of the projectile used in conjunction with the peak value of the guide beam to unambiguously define the roll position. The output (30) of the analyser (8, 9) is converted to peak pulses (31) having 180 DEG  ambiguity. The magnetometer (10) output (32) provides the gating pulses (33) to select the correct peak pulses (34), (18). <IMAGE>
Patent GB-2233692-A (GB)
Title: Enhanced oil recovery process
Inventor: BOCK JAN
IPC: C08F220/56
Filed: 1990-07-27
Abstract: Oil recovery from a production well is enhanced by injection of aqueous solution of a hydrophobically associating, water-soluble polymers containing one or more water soluble monomers and a water insoluble monomer group. The polymers are defined. The water-insoluble group is a higher alkylacrylamide and the water soluble groups are (a) acrylamide and (b) a salt of an ethylenically unsatured sulfonic acid.
Patent GB-2233137-A (GB)
Title: Voice recognition
Inventor: FUJIMOTO JUNICHIROH
IPC: G10L15/06
Filed: 1990-08-13
Abstract: A method for forming a reference voice pattern to be stored in a library for use in identifying an unknown input sound. The method comprises the steps of inputting a first sound pronounced for a particular letter combination by a speaker to form a first voice pattern, the first voice pattern represented by a sound energy level as a function of time; examining the first voice pattern to determine whether or not an intermediate voiceless interval is present within a predetermined time period at least from either a beginning or terminating end of the first voice pattern; repeating the inputting and examining steps for a second sound; combining the first and second voice patterns to define the reference voice pattern, wherein, if either of the first and second voice patterns has a voiced portion in the predetermined time period and the other of the first and second voice patterns does not have a corresponding voiced portion in the predetermined time period, the combining step comprises adding the voiced portion to said other of the first and second voice patterns.
Patent GB-2249355-A (GB)
Title: Water aeration using wind power
Inventor: HARRINGTON ROGER WILLIAM
IPC: F03D9/00
Filed: 1990-08-14
Abstract: The wind turbine is mounted on a vertical shaft which carries the agitator 3 for encouraging air entrainment into the water 6. Screw pump 4 conveys the newly aerated surface water downwards into the body of the water through tube 8. The arrangement is supported on the water surface by floats 5, there being, also, means (7, Fig. 1) for guiding the wind onto the turbine vanes. <IMAGE>
Patent GB-2238089-A (GB)
Title: Method of producing a plain bearing
Inventor: TANAKA TADASHI
IPC: F16C33/06
Filed: 1990-08-31
Abstract: A method of producing a plain bearing having an alloy surface layer comprises placing a bearing component (1) in a vacuum chamber (7) filled with low pressure argon, bombarding it with argon ions to remove any oxide or other unwanted surface material, then heating the component and depositing an alloy layer on it by sputtering. The bearing component may be of Cu/Pb/Sn alloy or Al/Si/Zn alloy, and the surface layer may be of Pb/Sn/In alloy or Pb/Sn alloy respectively. <IMAGE>
Patent GB-2240145-A (GB)
Title: Vehicle axle beam and brake assembly.
Inventor: LAYFIELD JONATHAN MICHAEL HOWA
IPC: F16D65/22
Filed: 1990-12-05
Abstract: A brake camshaft (22), having a cam (23) at one end for actuation by rotation of the camshaft to expand the brake shoes of a drum brake, has two spaced bearing assemblies (16, 21), preferably both self-aligning, releasably secured on an axle beam (1) at mountings (8, 9). The mountings have apertures, conveniently slots (10, 13), at least one of which is open or openable laterally of the brake camshaft (22) to enable the camshaft (22) to be manoeuvred, with tilting or lateral movement, out of engagement with the apertures when the bearing assemblies (16, 21) have been released from the mountings, to withdraw the camshaft with its bearing assemblies from the mountings. In one example the mounting (9) remote from the cam, a bearing mounting bracket, has an open-ended slot (10) opening to the edge of the mounting for withdrawal of the camshaft, and the other mounting (8) has a slot (13) with which the cam (23) has to be aligned for withdrawal. The arrangement enables the brake camshaft (22) to be removed with its bearing assemblies (16, 21) without having to disturb the wheel hub.