baber/WOPTO huggingface dataset:
Patent GB-2386777-A (GB)
Title: Polarisation insensitive optical amplifier
Inventor: PECHSTEDT RALF-DIETER
IPC: H04B10/291
Filed: 2002-03-19
Abstract: A planar waveguide module 1 comprises a waveguide 2 and, in sequence along the optical transmission path, a first linear optical amplifier (LOA) 3, a 90{ polarisation rotator 4, a variable optical attenuator (VOA) 5 and a second LOA 7. The LOAs 3 and 7 are gain-clamped semiconductor optical amplifiers (SOA)s having linear gain responses over the required wavelength range. In the absence of the polarisation rotator 4 the polarisation dependent gains (PDG)s of the LOAs would be added together to provide an overall PDG of approximately twice the PDG of a single LOA. However the inclusion of the polarisation rotator 4 between the LOAs 3 and 7 causes a substantial reduction in the overall PDG. If TE polarised light is supplied to LOA 3, the polarisation rotator 4 will cause TM polarised light to be supplied to LOA 7, and accordingly the overall gain of the module will equal Gain(TE, LOA 3) + Gain(TM, LOA 7) - attenuation. On the other hand, if TM polarised light is supplied to LOA 3, the overall gain will be Gain(TM, LOA 3) + Gain(TE, LOA 7) - attenuation which is substantially the same as the gain for the inputted TE polarised light. Such a polarisation insensitive optical amplifier is advantageous since it is easily fabricated using known fabrication techniques, for example on a planar lightwave circuit on a SOI platform, and without having to modify the amplifying means.
Patent GB-2388978-A (GB)
Title: A phase locking loop frequency synthesiser
Inventor: DHUNA ASHOK
IPC: H03L7/10
Filed: 2002-05-14
Abstract: A frequency synthesiser 50 comprises a VCO56 whose output signal frequency is proportional to input voltage amplitude. In a first mode, the VCO output is fed via a divider 24 to a phase detector 26 which also receives a reference signal. The phase detector output passes via a loop filter 28 and a controller 70, which is passive in the first mode, back to the VCO56 to form a closed phase-locked loop. To adjust the frequency synthesiser output frequency, the controller 70 switches the circuit into a second mode in which the VCO56 output is not fed back, and a constant voltage source is supplied to the VCO56 instead so that the VCO output frequency is constant. The VCO transfer function is then altered by adjusting a variable capacitor 60 therein, and the circuit is then switched back to the first mode. The locking time of the synthesiser is thereby improved as output frequency changes.
Patent GB-2380584-A (GB)
Title: Multiple alarms uniquely addressable via a cental location
Inventor: MARRIOTT STEPHEN FRANCIS
IPC: G08B21/02
Filed: 2002-05-17
Abstract: Alarm apparatus has a plurality of alarm units (18) for carrying by or attachment to persons or animals, or to inanimate articles or structures; a central control station (11,12) for transmitting coded operating signals to the alarm units (18); and means (eg. a mobile phone) (1) for transmitting operation initiation signals to the central station (11,12) from respective supervisors of said persons, animals, articles or structures, wherein each alarm unit (18) responds only to operating signals that are coded with a code specific to that alarm unit and wherein the central station (11, 12) is arranged to transmit such a coded operating signal for a specific alarm unit after receipt of a specific initiation signal from an authorised supervisor of or supervisory unit for the specific alarm unit. The mobile phone may be specially adapted.
Patent GB-2372833-A (GB)
Title: Fibre optic attenuators and attenuation systems
Inventor: WAGONER GREGORY A
IPC: G02B6/26
Filed: 1999-02-18
Abstract: Controllable fiber optic attenuators and attenuation systems are disclosed for controllably extracting optical energy from a fiber optic, and therefore attenuating the optical signal being transmitted through the fiber optic. In one aspect, material is removed from a portion of the fiber optic, thereby exposing a surface through which optical energy can be extracted. A controllable material is formed over the surface for controllably extracting optical energy according to a changeable stimulus applied thereto, which affects the refractive index thereof In an improved embodiment, a controllable material is formed over the exposed surface for controlling the amount of optical energy extracted from the fiber optic, and a bulk material is formed over the controllable material, into which the extracted optical energy is radiated. The controllable material has a controllable index of refraction approximately matching the index of refraction of the cladding of the fiber optic, and the bulk material formed over the controllable material has a fixed index of refraction higher than the effective mode index of refraction of the fiber optic. This cladding-driven design varies the effective optical thickness of the controllable material, and therefore effects a controllable attenuation of the optical signal being transmitted in the fiber optic. Attenuation systems including these controllable attenuators, as well as control and sense sub-systems, are also disclosed.
Patent GB-2381994-A (GB)
Title: Synchronizing network switch routing table with management processor copy thereof wherein bursts of changes are smoothed out over time
Inventor: YIK JAMES CHING-SHAU
IPC: H04L12/56
Filed: 2002-09-12
Abstract: A method of synchronizing the information held in a switching database (224) associated with a switching function (102) of a data switching node, with a data network node identifier record (152) associated with a management processor (150) enabling a managed mode thereof is provided. An entry of the switching database is modified. A status specifier (234) corresponding to the modified entry is set to signify the modification thereof. An inspection of the switching database is initiated on the expiration of an adjustable timer, (242) and the information held in modified switching database entries is synchronized with the data network node identifier record. This method of synchronization of the information held in the switching database spreads out bursts of changes over time. The advantages are derived from the use of a more economical management processor while providing the same or enhanced levels of service of the data switching node.
Patent GB-2381549-A (GB)
Title: Apparatus and method for downhole fluid separation
Inventor: BOUMA JELLE SIPKE
IPC: E21B41/00
Filed: 2001-07-06
Abstract: A well (1) extending from the earth's surface (2) to an underground production formation (4) containing hydrocarbon oil and water, which well (1) above the production formation (4) is provided with a separation chamber (6) in which a static oil/water separator (10) is arranged comprising an inlet (12) to receive well fluid from an inlet well section (13) below the separation chamber (6), an outlet (15) for an oil-enriched component opening into the well section (16) above the separation chamber (6) and an outlet (18) for a water-enriched component opening into a discharge well section (19) below the separation chamber, wherein the height of the separation chamber (6) is larger than the thickness of the dispersion band that is formed under normal operation conditions.
Patent GB-2381976-A (GB)
Title: Electrode pad construction and connection for surface acoustic wave apparatus
Inventor: SHIMOE KAZUNOBU
IPC: H03H3/08
Filed: 2001-12-20
Abstract: A surface acoustic wave apparatus 11 comprises a piezoelectric substrate 1, at least one electrode for a surface acoustic wave element disposed on the piezoelectric substrate 1, an electrode pad 9 disposed on the piezoelectric substrate 1 and arranged to be joined with a bump 10 during a bump bonding process performed by a flip chip bonding system, and a wiring electrode 7b for electrically connecting the electrode pad 9 and the electrode for surface acoustic wave element. The electrode pad 9 includes a first electrode layer 2a disposed on the piezoelectric substrate 1 and a second electrode layer 7a laminated on the first electrode layer 2a. The second electrode layer 7a and the wiring electrode 7b are integral with each other and include the same conductive film 7.
Patent GB-2388387-A (GB)
Title: Inflatable packer with prestressed bladder
Inventor: KUTAC ANDREW
IPC: E21B33/127
Filed: 2003-04-16
Abstract: An inflatable packer 10 is provided having a pre-stretched bladder to minimize Z-folding. An expandable outer body 11 includes an inner elastomeric bladder layer 12. a reinforcement layer 14 which may include overlapping slats or cable, and an outer elastomer cover layer 16 which may cover only a portion of the reinforcement layer 14. The bladder 12 may expand non-uniformly due to the variations in the cross-section of the borehole 20, irregularities in construction of the bladder 12, and/or difference in resistance to expansion between the covered portion and the exposed portion of the reinforcement layer 14. An improved inflatable packer and method comprises pre-stretching the bladder 12 to keep the bladder in tension and minimize the occurrence of Z-folds. The bladder is placed in tension by stretching it axially between upper and lower packer subs prior to inflation. This is done either before or after the packer is placed in the well bore. The axial force may be pneumatic pressure or a spring may be used. The stretching may be 10% - 40% of the unstretched length. The radial thickness of the bladder prior to being axially stretched may be greater than a radial spacing between an OD of the packer tube and an ID of the reinforcement layer such that the bladder is axially stretched to fit within the radial spacing.
Patent GB-2391077-A (GB)
Title: A method to improve fuel economy of an engine
Inventor: SURNILLA GOPICHANDRA
IPC: F01N13/04
Filed: 2003-06-02
Abstract: A method is disclosed for controlling operation of an engine 10 coupled to an exhaust treatment catalyst 70 in which, under predetermined conditions, the method operates an engine 10 with a first group of cylinders combusting a lean air/fuel mixture and a second group of cylinders pumping air only (i.e., without fuel injection). In addition, the engine control method also changes to combusting in all cylinders under preselected operating conditions such as fuel vapour purging, manifold vacuum control, and purging of stored oxidants in an emission control device.
Patent GB-2393580-A (GB)
Title: Active antenna array with multicarrier linear power amplifiers coupled proximate the antenna elements
Inventor: HOPPENSTEIN RUSSELL
IPC: H01Q1/24
Filed: 2003-09-18
Abstract: A beamforming antenna array on a communications tower has multicarrier linear power amplifiers (MCLPA) 54 in the transmit path of each individual antenna element 34 (figures 4,5) or each sub array 36 of antenna elements defining the array. Low noise amplifiers LNA 58 are used in the receive path. A predistortion circuit (94, figure 5), which reduces the generation of intermodulation distortion, may be used to provide linearisation of the antenna outputs. Since the power amplifiers are proximate the antenna elements rather than in a base station control unit (see figure 2), signals may be transmitted between the tower and the control unit at the base of the tower in digital baseband via optical fibre transmission lines. This solves the problem of cable losses experienced with conventional high power coaxial cables and power splitters.
Patent GB-2394730-A (GB)
Title: Mortarless brick and locking bolt building system
Inventor: MORRISON JOHN HUGH ORCHARD
IPC: E04B2/06
Filed: 2003-10-14
Abstract: A mortarless building system combines interlocking bricks 1 secured with segmentally connectable bolts 2. Each brick is recessed on its underside and has apertured studs 20 protruding from its upper surface for locating within the recess of the brick above. Locking bolts 2 with integral upper threaded sockets 7 are passed through any number of the apertured studs so as to secure successive courses.
Patent GB-2407500-A (GB)
Title: Use of microparticles for antigen delivery
Inventor: ENSOLI BARBARA
IPC: C07K14/16
Filed: 2003-11-03
Abstract: The invention relates to microparticles that may be used for antigen delivery and vaccine immunization strategies. The invention in particular relates to microparticles that are useful in the prophylaxis and treatment of human immunodeficiency virus (HIV) infections.
Patent GB-2394335-A (GB)
Title: Decibel adjustment device with shift amount control circuit
Inventor: NAKAYAMA MASAHIKO
IPC: G06F7/52
Filed: 2000-06-26
Abstract: A decibel level adjustment device calculates an output signal that is a multiple or fraction of a input digital signal. Adders 235,236,237 sum selected signal line outputs of a series of fixed hard-wired shifters, the selection being performed by switches 231, 232,233. The selected outputs may comprise either shifted signal values or zero values. At least one signal line supplied to the adders bypasses the switches. Switches 232,231 may receive inputs from first and second shifted signal lines where the second is shifted by two more bits than the first and switch 233 may receive an input from a signal line which is not inputted to the other switches.
Patent GB-2410669-A (GB)
Title: Bird feeder with seed recycler
Inventor: GUY LESLIE
IPC: A01K39/012
Filed: 2004-02-04
Abstract: A wild bird feeder suitable for thistle/niger seed, essentially having two seed compartments 1,2 situated one above the other, including perches 6 convenient to feeding apertures 5. There may exist 2 or more seed compartments. Uneaten seeds dislodged from the upper compartment 1 feeding apertures, fall into the lower compartment 2 by way of an integral gutter 4. These seeds may then be recycled back into the upper compartment. Preferably the seed compartments would be separate interchangeable units, whereby the lower unit would simply be disconnected and repositioned at the top when full. A removable lid (Fig 1,7) may include a hanging point. The seed compartments, or hopper units, are coupled by joint connection 8 which may be a bayonet, screw, or other suitable union. The lid is provided with the same joint connection.
Patent GB-2410892-A (GB)
Title: Mattress
Inventor: SCOTT ALAN
IPC: A47C27/20
Filed: 2004-02-13
Abstract: A mattress (10) having a base (11) for resting on a support surface, and a top surface (12) for lying on, and an integrated assembly of plastics foam (16) and pocketed springs (18) filling the space between the base (11) and the top surface (12), in which: the integrated assembly includes a base layer (14) of plastics foam, a top layer (15) of plastics foam, and an intermediate layer (16) of plastics foam formed with transversely spaced parallel rows of recesses (17) in which rows of pocketed springs (18) are arranged.
Patent GB-2399689-A (GB)
Title: Remote connector/controller for an electrical device, e.g. in a vehicle
Inventor: KOWTUN PETER
IPC: H01R13/66
Filed: 2004-02-20
Abstract: A connector 26 for remotely connecting electrical devices 28, e.g. in the seating, lighting and door systems in a vehicle, to a control module 14 comprises a housing 56,58 retaining a circuit board with its associated connections, the circuit board mounting circuitry with at least one node adapted to control an electronic device 28 of at least 'semi-smart' capability (i.e. with electronics of more than a basic level of complexity) and having a transceiver communicating with the device 28 and with a receiver 25 on the module 14. The transceiver signals may be transmitted by wireless or along wired connections.
Patent GB-2401273-A (GB)
Title: Secure facsimile transmission using private and public key encryption
Inventor: CHEN STEVEN H
IPC: H04N1/00
Filed: 2004-03-15
Abstract: A system 100 for secure facsimile (fax) transmission comprises a destination, receiving fax machine 105 which may receive a private encryption key 145 provided by a user, and this private key is used to generate a public key 150. A sending fax machine 110 then encrypts a fax document using the public key 150 before the fax data is transmitted to the receiving facsimile machine 105 for decryption using the private key 145 in a decryption algorithm. For additional security, the destination fax machine may generate a random value for each public key that is associated with a private key, or may generate a same value for each public key that is associated with a private key.
Patent GB-2412642-A (GB)
Title: Multiple conveyor system with stacking means
Inventor: MCDONNELL DECLAN ARTHUR
IPC: B65G37/00
Filed: 2004-03-03
Abstract: Apparatus for handling frozen food items comprises a first conveyor 1 on which food is led through a freezer, transfer means comprising a second conveyor 2 and a plate 3 for lifting the food from the first conveyor onto the second conveyor, a third conveyor 10 to which the food is delivered by the second conveyor, a gate (11, 12, fig 3) onto which the food items are delivered by the third conveyor, the gate being moveable from a closed configuration to receive food items to an open configuration to deliver food items, a receiving means positioned below the gate for receiving food items, and a delivery means for delivering the food items from the receiving means to a fourth conveyor 20,21.
Patent GB-2412728-A (GB)
Title: High integrity gas detector
Inventor: RICHMAN LEE PAUL
IPC: G01N21/39
Filed: 2004-04-02
Abstract: A high integrity gas detector includes a laser diode 1, driven by a current waveform synthesised to operate the laser diode close to a chosen optical absorption line of the gas to be detected; whilst repeatedly scanning it's wavelength over the absorption line. Radiation from the laser diode is split into two fractions, one fraction passed through a retained sample 13 of the target gas and illuminating optical detector 14, the transmitter using the signal from this detector to maintain the absorption line with respect to the wavelength scanning waveform, the other fraction being transmitted through monitored space 25 to a receiver. The signal from receiver detector 27 is processed to determine the quantity of target gas present in the monitored space. When instructed, the transmitter simulates the presence of target gas in the monitored space by synthesising a laser diode drive current waveform including a replicated gas absorption feature.
Patent GB-2413280-A (GB)
Title: Playpen with double upright corner assembly
Inventor: CHEN SHUN-MIN
IPC: A47D13/06
Filed: 2004-04-19
Abstract: A playpen comprises a plurality of corner assemblies wherein each corner assembly comprises an upper bracket 12, a lower bracket 11, connection rods 13 and 14 and two parallel uprights 15 and 16, wherein one upright 15 is disposed inwardly of the other upright 16. The uprights bush around projections (not shown) in the lower bracket 11 and locate in slots (not shown) in the upper bracket 12. The uprights are secured by rivets 194 195 in the lower bracket. Sidewalls (not shown) pass through the gaps between the inner and outer uprights and are attached by screws and square washers (not shown) to the inner upright 15 thus partially overlaying the inner upright.
Patent GB-2415086-A (GB)
Title: Charge detector array
Inventor: BIRKINSHAW KEITH
IPC: G01T1/29
Filed: 2004-06-08
Abstract: A charge detector array for recording signals from a microchannel plate (MCP) in which a synchroniser circuit (14) is provided in respect of each of a plurality of channels, interposed between a respective charge amplifier and discriminator unit 12 and a counter 16, for monitoring output pulses generated in respect of the channel of interest and one or more channels adjacent thereto, and for only causing an output pulse in respect of the channel of interest to be counted if it is generated before any output pulses generated in respect of the adjacent channels, and/or its duration is greater than that of any output pulses generated in respect of the adjacent channels, thereby enhancing the resultant image.
Patent GB-2403141-A (GB)
Title: Upholstered medical couch
Inventor: CLARE ROY
IPC: A61G7/015
Filed: 2004-06-25
Abstract: A medical couch has patient support platforms that are disposed on a support frame. One or more of the platforms may be pivotally mounted. In one embodiment the rear face of each platform has a peripheral lip 32 covered by an upholstery panel that directs spilt fluid away from an upholstery seam 35. In another embodiment a platform 15 is pivotally connected to the support frame 18 by a hinge disposed in a clearance between adjacent platforms. The platform connected to the hinge by an adjustable connection 41,45,46 so as to allow movement of it away from the hinge and increase size of the clearance. In a further embodiment a locking mechanism 20 allows for independent locking of support stays 60 that are used to support the back rest 15 in a raised position. The locking mechanism provides for simultaneously unlocking and comprises a rotary shaft 50 and sleeves 52 mounted thereon, the sleeves having arms 57 for receipt of the stays and being arranged such that they can rotate on the shaft by a limited amount. The arms are provided with weights 58.
Patent GB-2417220-A (GB)
Title: Spindle finishing
Inventor: WALKER JAMIE GUNN
IPC: B24D15/00
Filed: 2004-08-21
Abstract: Apparatus for finishing a spindle comprises a plurality of elongated flexible strips 13 incorporating abrasive particles, both ends of each of the flexible strips being connected releasably to a handle 10. Each handle has keyhole-shaped formations 11 to receive correspondingly shaped fitments 12 at the ends of the strips. Different grades of abrasive can be used depending upon the finishing process to be carried out.
Patent GB-2417818-A (GB)
Title: Modular display of tessellated tiles
Inventor: MARETT-CROSBY S
IPC: G09F7/12
Filed: 2004-09-03
Abstract: A modular display comprises a plurality of first tiles (12) of a first shape and a plurality of second tiles of a second shape (14). The first (12) and second tiles (14) are complimentary in shape so that they may be tessellated to cover a surface. The tiles are adapted to receive indicia thereon. Preferably the tiles are dry wipe. It is also preferred that the first tiles (12) take an octagonal shape, and the second tiles (14) are square in shape. Additionally, it is desired that the tiles are provided with releasable securing means in the form of; double sided tape, or hook and loop fasteners, or magnetic means.
Patent GB-2408045-A (GB)
Title: A method for preparing a seaweed based soil enriching composition
Inventor: O'MAHONY JEREMIAH JOHN
IPC: C05G5/23
Filed: 2004-09-07
Abstract: A method for preparing a seaweed-based soil enriching composition comprises soaking fresh seaweed in a dilute phosphoric acid aqueous solution, and then subsequently rinsing the seaweed in fresh water. The phosphoric acid solution removes phytotoxic polyphenol compounds from the seaweed. Preferably the seaweed is chopped to a maximum dimension of approximately 12mm and is soaked in the dilute phosphoric acid solution for a time period of approximately 20 minutes at room temperature. The rinsed seaweed is then subject to an alkaline extraction to extract humic acids in a liquid slurry. The liquid slurry is filtered to provide a liquid plant growth promoting composition and the remaining sludge is mixed with seaweed meal to provide a soil conditioning composition.
Patent GB-2419374-A (GB)
Title: Wire strainer, e.g. for fence wire
IPC: E04H17/26
Filed: 2004-10-23
Abstract: A wire strainer comprises a metal tube 12 with a V-shaped handle end 13, and near the other end a metal flange at right angles to handle 13 with a slot 11 to receive a wire. For tensioning barbed wire (Fig 4), the post 14 is used as the fulcrum, and slot 11 bears against a barb 15 to grip the wire. For non-barbed wire such as pig wire 16, the V shaped handle 13 is rotated as shown to grip the wire. The V handle can be held against the body leaving both hands free to fix the tensioned wire.