baber/WOPTO huggingface dataset:
Patent GB-1237110-A (GB)
Title: Improvement in or relating to the production of vinyl acetate
Inventor: BAILEY HUBERT CHARLES
IPC: C07C27/00
Filed: 1968-12-20
Abstract: 1,237,110. Vinyl acetate. BP CHEMICALS Ltd. 12 Dec., 1969 [20 Dec., 1968], No. 60569/68. Heading C2C. In the process for the production of vinyl acetate and acetaldehyde by the reaction of ethylene with molecular oxygen and acetic acid in the presence of a platinum group metal catalyst, and prior to a build-up of more than 2À0% by weight of acetaldehyde in the reaction product, the said reaction product is partially deoxygenated, e.g. by distillation, and benzoquinone added, suitably in an amount of from 50 to 500 p.p.m. based on the vinyl acetate content, followed by further deoxygenation, e.g. by boiling, in order to substantially prevent polymerization of the vinyl acetate.
Patent GB-1365690-A (GB)
Title: Bipolar unipolar transistor structure
IPC: H01L29/00
Filed: 1971-12-30
Abstract: 1365690 Semi-conductor devices WESTING- HOUSE ELECTRIC CORP 30 Dec 1971 [26 Jan 1971] 60695/71 Heading H1K A semi-conductor structure comprises a bipolar transistor including emitter 14, base 12 and collector 10 regions, adjoining a wafer surface, the surface having an oxide film 22 thereon and a layer of photosensitive, semiconductive, material 24 on a part of the oxide film so as to span one of the junctions between the bipolar transistor regions. The layer 24 has a contact 26 and acts as the gate of a unipolar transistor, the emitter 14 forming the source, and base 12 the drain, a channel being formed beneath the oxide film. In the presence of U.V. or visible light, electron-hole pairs are formed in layer 24 causing variation of the bipolar transistor characteristics. The layer 24 may be of CdS, or a sulphide, telluride, selenide or oxide of lead or zinc. In an alternative embodiment the layer 24 spans the base-collector junction. In a further embodiment an insulating layer, e.g. SiO 2 , may be interposed between layer 24 and contact 26.
Patent GB-706912-A (GB)
Abstract: 706,912. Bakers' ovens. SPOONER FOOD MACHINERY ENGINEERING CO., Ltd. Aug. 21, 1951 [Aug. 22, 1950; Aug. 22, 1950], Nos. 20709/50 and 20710/50. Class 51 (2) In a continuous baking oven of the straightthrough or tunnel type in which the comestibles are heated partly by radiation and partly by forced convection, steam is supplied to the oven from a heat exchanger disposed in the circuit of the forced convection gases. The steam unit includes a heat exchanger 29 supplying steam through a receiver 34 and a pipe 35 to the inlet of a motor driven fan 23 connected at the outlet side by ducts 24, 25 to pressure chambers 18, 19 formed with convergent slit-like nozzles 20, 21 extending transversely across the conveyer 5, the steam returning to the inlet side of the fan through an opening 27 between the pressure chambers 18, 19. The heat exchanger 29 comprises headers 30, 31, Fig. 5, fed with water at 32 and connected by gilled or finned tubes 33 passing through the duct near the outlet of a fan 8 supplying heated gases to pressure chambers similar to the chambers 18, 19 disposed above and below the upper run of the conveyer 5. In a modification, Fig. 6, the heat exchanger 29 is disposed in a closed circuit of ducts 37, 39, 40 and 41 supplied by a fan 38 with heated gases bled from the convection system of the oven by a valve controlled duct 42 and provided with an escape duct 46. The capacity of the fan 38 is preferably a substantial multiple of the total volume of the closed circuit of ducts whereby steam is generated using a relatively low temperature gaseous medium. Water is fed to the heat exchanger by a pump 47 and steam passes to the receiver 34 by a pipe 49, the receiver being provided with a pressure gauge 50 and relief valve 51. A thermostat 52 is disposed in the duct 37. Specification 706,691 is referred to.
Patent GB-2032210-A (GB)
Title: Logic Circuit
IPC: H03K19/086
Filed: 1978-10-11
Abstract: A logic signal and an amplified version of it are summed at an output point, to reduce the time taken for the output to reach its maximum amplitude. Multi-emitter input arrangements are described in which the amplified version of the signal is derived from an emitter coupled pair of farther transistors. <IMAGE>
Patent GB-2005532-A (GB)
Title: Windscreen wiper
IPC: B60S1/38
Filed: 1978-10-13
Abstract: A vehicle windscreen wiper comprises a blade holder 11 and wiper blade 12 constructed in one piece from a resilient elastomeric material. A longitudinal cavity 13 is provided in the blade holder to contain a stiffening bar 15 for the windscreen wiper. In the middle region of the wiper there is an opening through which the bar can be connected to a wiper arm. <IMAGE>
Patent GB-2008383-A (GB)
Title: Precooked potato products
IPC: A23L19/12
Filed: 1978-11-21
Abstract: Precooked potato products are prepared by a process wherein the potatoes are washed, peeled, and treated whole or cut into pieces. The so- prepared potatoes are cooked at a temperature below the temperature at which sloughing of the potato surface would occur if the whole potato were cooked to its centre at that temperature. Then, the potatoes are heated in air and cooked again at a temperature of about 50 to 100 DEG C. Following the last cooking procedure the potatoes can be frozen, chilled, or retorted to preserve them. To prepare them for consumption the potatoes can be fried or boiled.
Patent GB-2031808-A (GB)
Title: Reusable drawing surface
IPC: B43L1/00
Filed: 1979-02-08
Abstract: A reusable drawing surface of acrylic material is used to prepare signals for photographic or video recording. Material which is to be included in all the records so made may be provided on the surface in permanent form.
Patent GB-2031295-A (GB)
Title: A de-watering plant for removing water from sludges and similar substances
IPC: B01D33/00
Filed: 1979-02-12
Abstract: In a de-watering plant for sludges, particularly for water purification, a sludge chamber 1 has an inlet 2 and an outlet 5, the bottom wall of the chamber comprises a continuous filter band 6 carried on a carrier belt 7, and mounted in the sludge chamber are a plurality of rotatably driven filter drums 8, each drum 8 having an associated cleaning device. The filter drums are arranged to urge the sludge towards the sludge chamber outlet and also serve to conduct filtrate externally of the sludge chamber. The cleaning device may comprise a brush 30 mounted inside the drum co-axially for relative rotation and a stationary scraper element 9 outside the drum. Internal spray nozzles may be provided for the drum. The band 6 leads to at least one pressing stage where the sludge on the band is pressed by a second endless band 11. The band 6 is supported on a carrier band 7 which has channels 18. <IMAGE>
Patent GB-2018168-A (GB)
Title: Automatic Armature Winding Machine and Method of Operation
IPC: H02K13/04
Filed: 1979-03-30
Abstract: An automatic armature winding machine includes a wire-insertion mechanism (17) and a control and driving mechanism (1) for laying commutator connections into the respective commutator (11) slots of an armature (10) so that short wire loops are formed. The winding wire (15) is caught in the wire-insertion mechanism (17) by a swingable catcher-hook (33 or 33') and brought into the region of the commutator slots. The winding wire (15) is laid into the corresponding commutator slot via a guide piece 18 and the commutator slot is peened over by a displaceable peening tool (24 or 24'). By turning the winding arms (14) (14') against their winding direction the winding wire (15) already laid in the commutator slot is pulled over the peening and laid into the same commutator slot with simultaneous formation of the wire loop. In the control and driving mechanism, a driving motor (2), tachometer generator (3), armature chuck (7) and position indexing disc (4) are arranged on a common shaft (8) so as to be free of relative play, the indexing disc (4) being provided for the positioning of the commutator armature (10). <IMAGE>
Patent GB-2047955-A (GB)
Title: Continuous Process for Fabricating Solar Cells
Inventor: CZESLAW DEMINET
IPC: H01L31/18
Filed: 1979-04-26
Abstract: The process comprises the following steps: (1) forming a glass sheet 34 which defines a substrate layer for the solar cell; (2) forming a diffusion barrier layer 36 on at least one surface of the substrate; (3) forming a first electrically-conductive layer 40 on the diffusion barrier, the first electrically conductive layer being a first electrode in the solar cell; (4) depositing small-grain polycrystalline silicon in a thin film 44, i.e. 10-100 micrometers, on the first electrode layer; (5) recrystallizing the deposited polycrystalline silicon until it reforms into large-grain polycrystalline or single-crystal silicon; (6) forming a PN junction 63 in the recrystallized silicon layer; and (7) forming a second electrically-conductive layer 62 on the recrystallized silicon layer, the second electrically-conductive layer being a second electrode in the solar cell. The solar cell produced by this process may be fabricated in large surface area configurations. <IMAGE>
Patent GB-2023810-A (GB)
Title: Canopy assembly for gas fires
IPC: F24C3/00
Filed: 1979-06-21
Abstract: The present invention relates to a canopy assembly for a gas fire comprising a main duct (14) connecting a gas combustion zone (4) in the fire to an exhaust flue (20), and a secondary duct (22) which in use induces a moving curtain of air in front of an open part (4a) of the combustion zone of the fire thereby to entrain any combustion products escaping from the combustion zone, into the secondary duct. <IMAGE>
Patent GB-2041648-A (GB)
Title: Car immobiliser
IPC: B60R25/045
Filed: 1979-07-10
Abstract: The unit consists of a small rectangular box B which houses an ignition earthing switch D and which may be hidden in numerous places in a vehicle, and held in position by its own permanent magnet, which will adhere to any metal surface. A switch indicator comprises a projecting ball E whereby one can feel whether the unit is switched on or off, when the unit out of sight. <IMAGE>
Patent GB-2028234-A (GB)
Title: Inching control for offset printing machine
IPC: B41F13/12
Filed: 1979-08-10
Abstract: A mechanism for adjusting the angular position of rotary parts of an electrically driven offset printing or duplicating machine includes a hand wheel which operates an "inching" system in such a manner that the angular movement of the hand wheel is directly correlated to the angular movement of the rotary parts. The hand wheel is coupled to a drive shaft of the machine through a planetary gear system based on detent disc 5 whose rotation on the shaft can be blocked by a locking pin 32 which is carried on a lever 27 that can be swung from a median position by the action of the detent disc on the pin as the hand wheel is turned. Movement of the lever operates a switch mechanism through switch cams 28 or 29 to the electric drive. <IMAGE>
Patent GB-2029303-A (GB)
Title: Descaling hot-rolled steel strip
IPC: B21B45/06
Filed: 1979-08-24
Abstract: In a method of processing steel strip the strip is hot rolled and thereafter is descaled by ejecting descaling agents against the strip. In the rolling step the strip passes in an S-shaped path around two rolls whose peripheral speeds are different and whose speed ratio is equal to the reduction ratio of the strip. The degree of reduction is from 2 to 8 percent. <IMAGE>
Patent GB-2038560-A (GB)
Title: Magnetic work-holding device
IPC: H01F7/06
Filed: 1979-10-03
Abstract: A magnetic work-holding device comprises at least two pole pieces 1, 2 defining a work supporting surface 3, 4, and a main magnet 6 interposed between them, the faces of the pole pieces also being fed by secondary magnets 7, 14, 15. A box-shaped ferromagnetic yoke 8 encircles the pole pieces and magnets to complete the circuit between the remaining poles of the secondary magnets. Further secondary magnets may be provided at the side faces of the pole pieces. In another arrangement the magnets below the pole pieces are electromagnets which can be reversed to oppose the effects of the main magnet. <IMAGE>
Patent GB-2064350-A (GB)
Title: Regenerating sand filters
IPC: B01D24/16
Filed: 1979-12-06
Abstract: A sand filter can be regenerated by expanding (but not fluidizing) the sand with air and simultaneously passing liquid through the sand in the same direction as the air.
Patent GB-2044321-A (GB)
Title: Drilling Fluids and Methods of Drilling
IPC: C09K8/24
Filed: 1980-03-07
Abstract: During drilling of a subterranean well a drilling fluid is used that contains, as a filtration control agent, a copolymer of (1) a (meth)acrylamido alkyl sulphonic acid or alkali metal salt thereof; and (2) a (meth)acrylamide or N- alkyl(meth)acrylamide. The copolymer may be cross-linked with a quaternary ammonium salt cross-linking agent.
Patent GB-2051571-A (GB)
Title: A metal sink arrangement
IPC: E03C1/33
Filed: 1980-05-09
Abstract: A metal sink arrangement (1) comprises a draining board (2), a basin (3) and a member (4) interconnecting the draining board (2) and the basin (3). The draining board (2) comprises a dropped edge (5) which has a rim (14) which bears against the basin (3). <IMAGE>
Patent GB-2075615-A (GB)
Title: Face seal for relatively rotatable members
IPC: F16J15/36
Filed: 1980-05-12
Abstract: A face seal, such as for a water pump in the cooling system of an internal combustion engine, comprises a rigid sealing ring carried by the free end of a moulded elastomeric sleeve on a mounting cup, the sleeve having at about its mid-length a circumferential flexible junction, defined by a surrounding groove with a contractile spring seated therein, and the sleeve being geometrically equivalent to an axially opposed pair of frusto-conical parts forming a toggle system which, under the pressure of sealed fluid, exerts a balancing axial bearing load on the sealing ring.
Patent GB-2061543-A (GB)
Title: Laser Recording Medium
IPC: G11B7/257
Filed: 1980-09-30
Abstract: The recording medium comprises a dimensionally stable substrate having thereon, in the order specified, a first layer of plastics material, a layer of optical energy absorbing material and a second layer of plastics material. The second layer of plastics material is applied as a solution and the first layer of plastics material is resistant to the solvent used in the solution. An example given is where glass is the substrate material coated in order with polyester, tellurium (the thermographic layer) and then cellulose acetate butyrate.
Patent GB-2060230-A (GB)
Title: Improved Error Coding for Video Disc System
IPC: H04N9/82
Filed: 1980-10-10
Abstract: In a video disc system wherein each data field includes, as well as a video signal, a predetermined digital start code followed by a digital error code and digital information bits, the error code is a polynomial division code chosen so that for each data field an error code remainder register in the video disc player initially contains the predetermined start code rather than zero, and/or, if no errors are detected, finally contains the predetermined start code rather than zero. An arrangement is also described which, in response to the reading of a particular sequence of data from the disc indicating the end of the record, disables the read head.
Patent GB-2088256-A (GB)
Title: Manufacturing toothed racks
IPC: B21K1/76
Filed: 1980-12-03
Abstract: A method for manufacturing toothed racks, which are suitable for producing variable ratio racks, comprises a first working step for the preliminary or rough forming of rack teeth (13a) which resemble the shape of final rack teeth to be formed, and a second working step in which a forging operation is used to finish the rack teeth formed in the first step into their final shape by using upper and lower dies (14, 15) which have the configuration suitable for forming the rack teeth to be produced. The first working step may be a forging operation, or a cutting operation, possibly preceded by a forging or an extrusion operation. <IMAGE>
Patent GB-2098725-A (GB)
Title: Measurement of food material properties
IPC: G01N21/31
Filed: 1981-04-14
Abstract: A method and apparatus for on- line measurement of food material parameters provides for comparison of radiated and reflected visible or near infrared radiation and the derivation from the measured wavelengths of a measure of the or each food parameter. Biscuits travel on a conveyor (2) under a test head (5) comprising LED's or other radiation sources (8) and focussing lenses (10) which direct radiation at different specific wavelengths each associated with a selected parameter on the biscuits (4), a part of each projected radiation passing via beam splitters (9) to a first detector (11) which produces outputs representative of the radiated radiations. A focussing means (14) and second detector (12) receives the diffusely reflected radiations and produces sequential outputs representative of them. Sequential comparison of the associated incident and reflected radiations enables each food parameter to be monitored in turn. The reflected radiation at two wavelengths is compared for each parameter. <IMAGE>
Patent GB-2074431-A (GB)
Title: Improvements in and relating to soil working assemblies
IPC: A01B15/18
Filed: 1981-04-27
Abstract: The presence of rank vegetation or loose crop residue on the soil surface (straw, maize stalks etc.) is always troublesome to ploughs, cultivators, seed drills and other agricultural implements required to slice vertically and penetrate the soil. In the illustrated embodiment of the invention (Figure 1), the knife coulter 10 of a seed drill 14 is continually cleared of trash by resilient disc-mounted cleaning members 16-18 which on losing contact with the ground surface spring back from a ground-induced flexed position (member 16) to a relaxed one (member 17) and in the process strike trash from the leading edge 20 of the coulter. In an alterative embodiment, members 16-18 are instead flexed by engagement with an appropriate abutment surface provided on or by the support structure for disc 12. <IMAGE>
Patent GB-2101272-A (GB)
Title: Gas valve assemblies
Inventor: ROBERTS PETER DEREK
IPC: F16K5/10
Filed: 1981-06-09
Abstract: A gas valve assembly incorporates two valves in series. One is a modulating valve having a tapered plug (58), rotatable in a tapered bore (55). Ports 68, 57 in the plug and bore overlap through a range of registering positions. The other is an on/off valve inside the plug and with an axially movable valve member (61). Coupling between the valves is such that when the modulating valve is in its range of registering positions the valve can be open only when the modulating valve is in a position such as to permit gas to flow at at least a certain minimum rate. To this end the plug is rotated by a niting pin (75), which also follows a shaped track (77) controlling the axial movement of the pin and consequential operation of the on/off valve. A resilient ring co- operates with the pin to provide a positive action and to prevent the on/off valve remaining only partially open. There may also be a flame- failure valve. <IMAGE>
Patent GB-2079403-A (GB)
Title: Centering sleeve for shaft joints
IPC: F16D3/50
Filed: 1981-06-17
Abstract: A reinforced centering sleeve 3 is insertible in the receiving bore 1 in the end of one articulated joint shaft 2, into which sleeve a pin 4, which is rigid with the end of the other joint shaft, can be inserted concentrically, preferably via a resilient intermediate layer 8, the sleeve having as reinforcement two tubes 5, 6 inserted concentrically one within the other, between which tubes an elastomeric layer 7 is arranged. These tubes 5,6 consist of drawn sheet steel, and the inner tube and/or the resilient inner rubber coating 8 may be constructed to (form) a seal of the centering sleeve at its inner end. <IMAGE>
Patent GB-2095130-A (GB)
Title: Flotation plant
IPC: C02F3/20
Filed: 1981-07-24
Abstract: An arrangement for floatation of solid particles from liquids such as from sewage, particularly for settling of coal from a conditioned pulp, has a conditioning device from which a pulp flows in a predetermined direction, gasifying device having a gasifying surface extending parallel to the pulp flow direction, and a separating device having a substantially upright conical container for foam formation, a level controlling element, and bubble generator composed of an elastic and porous synthetic plastic material.
Patent GB-2093721-A (GB)
Title: Selective production of olefins
IPC: C07C2/66
Filed: 1981-08-11
Abstract: A lower alcohol and/or ether feed is selectively converted to a mixture of light olefins, including ethylene and propylene, by catalytic contact of the feed material with a catalyst comprising one or more zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index in the approximate range of 1 to 12. The catalytic conversion is carried out in the presence of bulky heterocyclic organic nitrogen compounds to suppress the formation of mono-nuclear aromatics. The process of this invention is particularly useful in the production of C2-C3 olefins from methanol or dimethyl ether.
Patent GB-2106717-A (GB)
Title: A self-erecting waveguide antenna
Inventor: PASSMORE RAYMOND
IPC: H01Q1/08
Filed: 1981-09-22
Abstract: A self-erecting waveguide antenna (2) comprises a body portion (4); a flat spring sheet coil (6) which is secured at one end to the body portion, which forms a continuous tubular surface in the erected condition of the antenna (Fig 2, 3, not shown), which is collapsible for storage, and which is extendible to an operative position by energy stored in the collapsed coil; and a bung (8) which is made of a radio transparent dielectric material and which is for preventing the ingress of unwanted foreign material into the body portion and the coil, the bung being provided with a radio reflective surface, and the radio reflective surface being provided in predetermined positions and in predetermined shapes for enabling a predetermined radio transmission or reception pattern to be obtained from the bung.   <IMAGE>
Patent GB-2108830-A (GB)
Title: Automatic key pocketer
Inventor: NORTON ALEXANDER
IPC: A45C11/32
Filed: 1981-09-30
Abstract: An apparatus, to be clipped on an outer garment or belt, consists of a spring loaded cord spool in a case with a special pocket attached, the cord being attached to a key-ring inside the pocket. Extracting the keys from the pocket creates a tension on the cord so that on releasing the keys from, say a vehicle's ignition, they will automatically return inside the pocket, which can be zipped up. <IMAGE>
Patent GB-2091466-A (GB)
Title: Speech Input Device in a System of Computer Recognition of Speech
IPC: G10L15/20
Filed: 1981-12-04
Abstract: Systems for the recognition of speech by computer have usually required that the speech be of a strictly standardised nature, free of regional accents, and unaccompanied by background noise. The problem has been to produce a system providing information which will allow accurate recognition in the presence of noise and with non-standard speech sounds. The invention provides to a computer in a speech recognition system information in parallel streams on a number of factors, viz the existence, in any signal which may contain speech sounds, of a fundamental repetitive structure and its periodicity detected by a voiced monitor 160; the existence of a high frequency component having a wide frequency band detected by an unvoiced monitor 162; the existence of a component having energy relatively stable with respect to time, and characteristic of background noise detected by a background monitor 164; the frequency and amplitude of the amplitude peak, and band width of sounds lacking a low frequency component detected by an analyser 166; and the frequency of resonant content of any component having a fundamental repetitive structure and the level of correlation detected by resonant frequency analyser 168, 170, 172.   <IMAGE>