baber/WOPTO huggingface dataset:
Patent GB-2307786-A (GB)
Title: An assembly of an optical component and an optical waveguide
Inventor: HARPIN ARNOLD PETER ROSCOE
IPC: H01S5/02
Filed: 1996-05-16
Abstract: An optical component such as a laser diode (1) and an integrated rib waveguide (2) are positioned in alignment with each other on a silicon-on-insulator chip which comprises a layer of silicon (7) separated from a substrate (8) by a layer of insulating material (9). A location recess is formed in the silicon-on-insulator chip for receiving the laser diode (1) and has at least two, non-parallel, location surfaces (3, 6). The rib waveguide (2) is formed on the chip in known alignment with the location surfaces (3, 6) and the laser diode (1) also has at least two reference surfaces (1A, 1B) which, when the laser diode (1) is positioned in the location recess, abut against the respective location surfaces (3, 6) of the recess, the location recess also being formed such that the position of one (6) of the location surfaces therein is determined by the position of an interface of said layer of insulating material (9).
Patent GB-2314475-A (GB)
Title: An operational amplifier connected to a low pass filter with complex pole pairs and having a feedback loop with a real pole to maintain good output impedance
Inventor: DOLMAN GRAHAM AINSLEY
IPC: H03H11/12
Filed: 1996-06-21
Abstract: An operational amplifier filter arrangement is described, which comprises an input for receiving a input signal, an operational amplifier with a feedback loop, a passive low pass filter network and an output for providing an output signal. The passive low pass filter has a transfer characteristic given by complex pole pairs and a single real pole is incorporated into the feedback loop. This gives the same overall frequency response as a conventional filter, but the amplifier's roll-off is dominated by the real pole. Increased negative feedback at higher frequencies maintains a good output impedance. A method of operating such an operational amplifier is also described.
Patent GB-2319196-A (GB)
Title: Pressure screen with intermediate rejects outlets
Inventor: PIMLEY JOHN JAMES
IPC: B01D29/25
Filed: 1996-11-14
Abstract: A pressure screen 10 for screening a suspension of papermaking stock comprises cylindrical screen means 20 arranged for outward flow filtration, with a drum-type rotor 15 mounted within it. The screening means 20 is divided into a plurality of annular screening zones 22. Positioned between these zones are outlets 30 for rejects. These intermediate outlets shorten the distance that unwanted materials must move across the screen, and promote an even concentration of rejects on the screen surface. The stock is introduced through inlet 12 into the interior of rotor 15, which has holes 35 for directing the stock towards each of the screening zones 22. Accepted material passing through the screening zones is removed through accepts outlet 40, whereas rejected material having passed through one of the outlets 30 is removed through a common rejects outlet 48.
Patent GB-2322409-A (GB)
Title: Vehicle door:unlocking:opening
Inventor: CHEVALIER JOHN PHILLIP
IPC: E05B85/20
Filed: 1996-12-16
Abstract: To unlock, and start the opening of, a vehicle door, motor 70 lifts pawl 24 and rotates latch 11 in direction 18 to be unlatched from frame bolt 18, the latch reacting with the bolt to push the door open (to the right). The motor oppositely rotates the latch to lock the door. The motor rotates a cam (Figs. 4 to 7, not shown), which is also moved axially by a spring, to actuate microswitches to reverse the motors' polarity, and thus its rotation.
Patent GB-2321741-A (GB)
Title: Verification of electronic transactions
Inventor: VANSTONE SCOTT A
IPC: G07G1/00
Filed: 1997-02-03
Abstract: In a method of verifying a pair of correspondents in an electronic transaction, the correspondents each include a first (e.g. RSA) and second (e.g. ECC) signature scheme. The first correspondent signs information according to the first signature scheme and transmits the first signature to the second correspondent which verifies it using the first signature scheme. The second correspondent signs information according to a second signature scheme and transmits the second signature to the first correspondent which verifies it using the second signature scheme. The transaction is rejected if either verification fails. The first and second correspondents may be a terminal 100 and smart card 102 respectively, and the invention permits the processing load on the card to be reduced.
Patent GB-2325026-A (GB)
Title: Slurry pump
Inventor: HUANG YU LIN
IPC: B65G53/30
Filed: 1997-05-07
Abstract: A pump for slurry includes a housing 10 for receiving the slurry from a funnel and two cylinders 13,14 secured to the housing, the cylinders operating alternately to draw slurry from the housing and deliver it through an oscillating pipe 31. The pipe is mounted to pivot about a shaft 26 journaled to the housing and has an end which selectively aligns with one or other of the openings 18,19 from the cylinders. The pivoting movement of the pipe 31 is effected by actuators 38 linked to respective arms 37 on the shaft of a follower member 34, the member 34 having a recess 36 which cooperates with rollers (42, Fig. 2) on an axle 41 carried by the pipe. To enhance the sealing between the pipe 31 and each opening 18,19, the pipe is movable along its own axis. To this end the pipe is slidable with respect to a barrel 25, the latter defining a cylinder which receives an annular piston (32, Fig. 2) on the pipe. Thus pressurized air can be supplied to the barrel 25 to act on the piston (32) so as to cause the pipe to sealingly engage with the selected opening 18 or 19.
Patent GB-2314098-A (GB)
Title: Papermaking dryer with multi-roll vacuum chamber
Inventor: DESHPANDE RAJENDRA D
IPC: D21F5/04
Filed: 1995-12-20
Abstract: The dryer of this invention employs a vacuum chamber interposed below ad between first and second heated dryer rolls (26,28). The vacuum chamber has two sides and a top which overlies two grooved reversing rolls (110, 114). The vacuum chamber controls all flow of air in the gap between and below the dryer rolls. The dryer-fabric-backed paper web passes from the first dryer roll around the reversing rolls and up to the second dryer roll. The dryer fabric seals the vacuum chamber, and air is drawn therefrom. The two rolls within the chamber permits a greater fraction of the dryer roll surfaces to be maintained in contact with the web, and the chamber permits a vacuum to be drawn on two rolls, and three sections of web which are not engaged by rolls, by a single vacuum source for significant cost savings.
Patent GB-2326369-A (GB)
Title: Double lid system
Inventor: WRIGHT STEPHEN
IPC: G21F7/047
Filed: 1997-06-20
Abstract: A double lid transfer system (10) for a box (12) includes a door (16) and a lid (14) which are substantially square, and over 1 metre wide. A seal (54) between the lid (14) and the door (16), and a seal (34) between the box (12) and the door frame (18), are each substantially flat over sufficient width to accommodate misalignment by at least Œ 2 mm. A tapered sleeve (48) and tapered pins (50) ensure the box (12) aligns correctly with the door frame (18).
Patent GB-2316228-A (GB)
Title: High contrast electroluminescent displays
Inventor: MAY PAUL
IPC: H01L51/52
Filed: 1997-04-10
Abstract: The contrast of an electroluminescent display using an organic EL layer (6) is improved by using a circular polariser (14) in front of the surface. The polariser causes ambient light to be absorbed (L T , L R ) while allowing transmission of emitted light (L E ) and therefore improves the contrast of the display.
Patent GB-2331284-A (GB)
Title: A container including a non-resealable closure device and an auxiliary sealing device
Inventor: BAKER ANTHONY LEONARD
IPC: B65D17/00
Filed: 1997-11-14
Abstract: A container includes within it an auxiliary sealing device 20 with a sealing member 26 for sealing an opening 18 after removal of a non-resealable closure device 19. The auxiliary sealing device has retaining means 27 operable from outside the container after the non-resealable closure device has been opened, in order to retain the auxiliary sealing device in its sealing position. The container may be a drinks can (10, fig 2), and the non-resealable closure device may be a ring pull with finger ring 16. The auxiliary sealing device may be spring biased to automatically seal the can once the non-resealable ring pull has been removed. For instance it may be a leaf spring 23 attached to a support 25 that fully extends beneath the opening, on which is mounted an annular synthetic foam sealing member that seals the auxiliary sealing device to the top of the can 12, once opened. The retaining means may be a stud 27, on the upper face of the auxiliary sealing device, slidable between two positions to allow the can user access to the contents of the can, or retain the auxiliary seal in its sealing position (fig 7).
Patent GB-2331451-A (GB)
Title: Grill
Inventor: FANTIN GIOVANNI BATTISTA
IPC: F24C7/04
Filed: 1997-11-20
Abstract: An infra-red oven or grill comprises upper and lower frustoconical housing sections 1, 2 spaced apart by a cylindrical housing section 3 secured to one frusto-conical housing section. The housing includes a frontal opening for access to the housing interior. An electric heater 4 is positioned generally coaxially with the longitudinal axis of the housing and is operable to emit infra-red rays. Positioned within the housing interior is a grid 9 for supporting products to be heated by infra-red rays emitted by the resistor. The heater is in two parts 5 + 6 and each part is operable separately via switches 7' + 7".
Patent GB-2331859-A (GB)
Title: Magnetic cores for rotating electric machines
Inventor: GERTMAR LARS
IPC: H02K1/06
Filed: 1997-11-28
Abstract: A method of manufacturing a core shape for a rotating electric machine comprising assembling together a plurality of shaped laminations (1) of magnetic core material to form a temporary core structure and adding moulded magnetic composite material to the temporary core structure to produce the final shape of the core structure.
Patent GB-2330974-A (GB)
Title: Image matte production without blue screen
Inventor: GIARDINO GIOVANNA
IPC: G06T7/00
Filed: 1998-07-20
Abstract: An action matte image is produced from a input sequence of images by producing a current clean plate image representing the background from the input sequence of images; comparing the current clean plate image and a current input image of the input sequence of images; and constructing the action matte image representing the foreground image in response to the result of the comparison, thus allowing the extraction of action sequences or the separation of the images of actors from an image comprising image data relating to both the actors and the general background without the requirement for a blue background. Another aspect provides a method and system for automatically identifying and defining regions of an image which correspond to a moving image.
Patent GB-2328809-A (GB)
Title: Emergency braking warning system for a vehicle
Inventor: HUANG TING-LUNG
IPC: G08B21/00
Filed: 1998-08-14
Abstract: When a vehicle undergoes emergency braking, a weight 2 moves forwardly within a casing 1 to a trigger position adjacent a sensor 4 which therefore inputs a signal to a controller 6 causing one or more lights (7, Figs.1,2) at the rear of the vehicle to give a warning signal. The lights 7 may be yellow, and the controller 6 may turn the lights 7 off after a predetermined time. The controller 6 may also actuate a sounding device/buzzer (8) which may provide a voiced alarm signal, such as "WATCH OUT!". The weight 2 may roll or slide in a groove 10 in the casing and is resiliently urged away from the trigger position towards a start position by means of a lever 3 and a spring 34. The sensor 4 may have a photo-detector 42 facing a photo-emitter 41, the light path between the emitter and detector being interrupted by the lever 3 when the weight 2 moves to the trigger position. In alternative embodiments, the weight 2 is made of magnetic material and the sensor is a read switch (4a, Fig.9), or the weight (2a, Fig. 10) is mounted at one end of a pendulum lever (3a) biased by the spring 34 to the starting position and the sensor is a micro-switch (4b).
Patent GB-2340846-A (GB)
Title: Reduced Pressure Washing Machine and Method
Inventor: MURRAY JAMES PETER
IPC: D06F18/00
Filed: 1998-08-28
Abstract: A washing machine comprises a vessel (2) into which washing items (6) are inserted through an opening (4) which is closable by a hatch (8). Means (10) are provided through which washing liquid can be introduced into the vessel. Means (14) are also provided for reducing the internal pressure of the vessel thereby causing bubbling within the liquid, agitating the items. A heater (20) is provided for heating the contents of the vessel. An inlet (22) for injecting gas or vapour into the vessel in order to create bubbles within the liquid may also be included.
Patent GB-2329602-A (GB)
Title: Method of producing a series of individual forged articles from feedstock produced on a continuous rotary extrusion machine and apparatus therefore
Inventor: KENNEDY STEPHEN THOMAS
IPC: B21C23/00
Filed: 1998-09-29
Abstract: The present invention is directed to a method of producing a series of individual forged articles from a feedstock produced on a continuous rotary extrusion machine from metal powder supplied thereto; comprises repeating a cycle of steps, the steps being characterised by comprising, in any appropriate sequence:- i) extruding the feedstock into a tooling chamber 10 initially to form a blank in a mould chamber 12 comprising part of the tooling chamber, the mould chamber being moveable between a first position and a second position to separate the material in the mould chamber from the feedstock; ii) stopping extrusion of the feedstock; iii) moving the mould chamber 12 from the first position to the second position; iv) with the mould chamber in the second position, ejecting the material from the mould chamber; v) forging the blank to produce an article; and vi) moving the then hollow mould chamber from the second position to the first position.
Patent GB-2330436-A (GB)
Title: Read-out from electrical modules
Inventor: BELLAVIA NICHOLAS J
IPC: G08B25/00
Filed: 1998-10-14
Abstract: Information as to status and functionality of an electrical module (34) can be locally obtained via circuitry (32) which sequentially presents in a discernable fashion a coded representation of the characteristic or functionality of interest via e.g. an LED (42). Initiation of the presentation is in response to an externally generated command signal from control switch(es) (44a) or wireless receiver (44b). The sequential output can be viewed directly by an operator (51) or can be sensed by a receiving unit (R1). When sensed by a receiving unit, the sequential presentation can be converted to an alpha numeric display. Parameters can be entered sequentially by means of locally generated input signals.
Patent GB-2331162-A (GB)
Title: Multi-step core structured single mode optical fibre and method of fabrication
Inventor: KIM JIN-HAN
IPC: G02B6/04
Filed: 1998-11-05
Abstract: A single mode optical fibre comprises a central core of a predetermined diameter a1 surrounded by two concentric outer cores and finally a cladding. The refractive index of the central core n1 is higher than the refractive index of the first outer core n2, which is higher than the refractive index of the second outer core n3, which is finally higher than the refractive index of the cladding n0. The cladding may be formed of silica (SiO 2 ) and the central core may be formed from SiO 2 -GeO 2 . The first and second outer cores may also be formed from SiO 2 -GeO 2 , or from SiO 2 -GeO 2 -F or SiO 2 -GeO 2 -F-P 2 O 5 . The distribution of the refractive indices of the core is multi-stepped, and this increases the overall diameter of the core, resulting in easier fabrication. As the optical fibre has a low dispersion value in a 1550nm wavelength, superspeed long distance transmission is made possible.
Patent GB-2344863-A (GB)
Title: Connector for conduits
Inventor: BURLINGTON GEOFFREY MICHAEL
IPC: A47L9/16
Filed: 1998-12-18
Abstract: The connector comprises a first part (12) and a second part (59) releasable from the first part (12), both having conduits for mutual communication with a seal (33) arranged between them characterised in that a movable arm (90) is mounted on the first part (12) and carrying a portion (32) defining the respective conduit, and biasing means (95), e.g a compression spring biasing the portion (32) towards the second part (59). Preferably, the direction in which the second part (52) is releasable from the first part (12) is substantially perpendicular to the direction of movement of the portion (32) of the first part (12) so that the second part (59) can be released from the first part (12) without placing undue stress on the seal, (33). A latch (96) retains the parts together and has an inclined face for moving the portion (32) against spring bias when the second part (59) is re-introduced. The first part is a chassis or housing of a robotic vacuum cleaner, the second part being an inlet to dirt/dust separating cyclone apparatus.
Patent GB-2346091-A (GB)
Title: Game Apparatus
Inventor: DRUCKMAN GIL
IPC: A63F3/02
Filed: 1999-01-28
Abstract: Game apparatus (40) comprising: a pressure operable switch (44),indication means (42) and means (41) for securing the game apparatus (40) to a player which locates the pressure operable switch over the back of a hand of the player. The pressure operable switch (44) is connected to the indication means (42) and operation of the switch (44) activates the indication means (42). The game apparatus (40) can be used in a game in which two players face each other and each player holds his or her two hands together palm to palm and both players advance their held-together hands towards each other until the hands of the two players touch fingertip to fingertip and then a first player slaps the back of the hand of the second player. The game apparatus (40) is used with the pressure operable switch (44) located over a hand of a player and the indication means (42) of the game apparatus gives an indication of a successful slap when the pressure operable switch (44) is operated during the slap. The apparatus also comprises counting means (42) for counting how many occasions the pressure operable switch has been operated during a game, a visual display unit for (49) displaying game information, timer means (42) and calculating means (42) which calculates from the number of operations of the pressure operable switch (44) counted by the counting means (42) and from elapsed time timed by the timing means (42) a rate of operation of the manually operable switch (44) during a game. The calculated rate of operation is displayed by the visual display unit (49).
Patent GB-2334276-A (GB)
Title: Reclosable valve for well completion systems
Inventor: PATEL DINESH R
IPC: E21B43/267
Filed: 1999-02-10
Abstract: A valve for use in a well tool comprises a body (50) with a bore (64) and a port (74) for fluid communication between the well and the bore, a piston (80) for movement between open and closed positions to open and close the port, a rupture disc (66) which ruptures at a predetermined pressure of fluid in the well so that this pressure is communicated to the piston to move it from a closed to an open position, and a lock member (90) for securing the piston, after it moves from the open position, in the closed position. The lock (90) may be attached to the body by a shearable member (98) such as a screw which shears when sufficient pressure is applied to the piston (80). Springs (99) then force the lock radially inward against the surface of the piston. When the piston returns to its closed position, the springs forces the radial segments (92) of the locking member into a groove on the mandrel (80) to permanently lock the mandrel in a closed position. The valve is applied to a fracturing tool (figure 1).
Patent GB-2333176-A (GB)
Title: Disc drive servo system employing thermal signals
Inventor: MEYER DALLAS W
IPC: G11B5/82
Filed: 1997-10-10
Abstract: A magnetic disc drive has a magnetoresistive element (26) for reading user data from concentric tracks of a rotatable magnetic recording disc (32). The magnetoresistive element has a resistance based on a magnetic field derived from user data and based on temperature of the magnetoresistive element. Heat generated by the bias current through the head is in part dissipated through the disc, the amount of heat dissipated being representative of disc/head spacing. The surface of the recording disc has contour elements (50, 52, 54) arranged in a pattern representing servo data, the contour elements having a height such that the spacing between the magnetoresistive element and the contour elements is different from the spacing between the magnetoresistive element and a nominal surface of the recording disc. As a result, a modulated signal (66) from the head contains a component representative of user data and a component representative of servo data.
Patent GB-2342307-A (GB)
Title: A multi-purpose holding and extraction tool
Inventor: MARSHALL VINCENT
IPC: B25B9/00
Filed: 1999-04-07
Abstract: A multi-purpose tool comprises an outer tubular body forming a handle 1 which is rotatably connected to an inner tubular member 17. Two cooperating jaws 2,3 protrude from one end of the inner member and are pivotally connected, via hinge pins 13 engaging slots 14, to a shaft which is axially movable when the handle is rotated relative to the inner member. The jaws have cam surfaces 7 which engage with end surfaces of the inner member such that when the shaft is moved in a direction away from the jaws, the jaws are caused to close around an object to be gripped. Pins 11 extend from the sides of the jaws and provide means to engage with a lever and plate assembly (6,18-20 fig 3) to enable extra leverage when removing resistant fasteners. The jaws each have a three part face (8-10 fig 9) to improve their grip.
Patent GB-2352829-A (GB)
Title: Infrared diffractive focusing mirror
Inventor: GIBSON DESMOND
IPC: G02B5/18
Filed: 1999-05-10
Abstract: A mirror structure 24 for an infrared detector device 28 includes focussing means formed by a diffractive optical element 7. There may be several such elements carried on a single support each element having a surface comprising an array of fine grooves. The mirror structure 24 may be formed of a moulded plastics composition and it may be of a shallow profile which enables a detector device 28 of compact shape to be constructed. The element may be holographic, and may act as a spatial filter. Methods of making the diffractive optical element are described. The diffractive optical element may have a symbol encrypted in it as an anti-counterfeiting device.
Patent GB-2351673-A (GB)
Title: Portable sports net or barrier
Inventor: DEROTHSCHILD DAVID
IPC: A63B61/00
Filed: 1999-07-06
Abstract: A portable device assisting the practice of sports on temporary sites comprises two telescoping poles 12, each with a tapered end for insertion into the ground, together with a flexible member 14 suspendable between the poles, this member typically being a mesh net for the playing of tennis, badminton or volleyball, or a web or sheet having a graphic depiction of a goal for football. The tapered ends of the poles can be constituted by removable and interchangeable end units for different types of ground, Figs 5 and 6 (not shown).