baber/WOPTO huggingface dataset:
Patent GB-1314583-A (GB)
Title: Field effect transistor gate circuits
IPC: H03K17/16
Filed: 1970-07-08
Abstract: 1314583 F.E.T. gating circuits; muting radio receivers SONY CORP 8 July 1970 [11 July 1969] 33181/70 Heading H3T A gate circuit has a capacitor C1 connected in series with a signal path between a signal input terminal t 11 and a first electrode of a F.E.T. Q, an output terminal t21 connected to the second electrode of the F.E.T. Q, means t3 for applying a control signal to a third electrode of the transistor to turn the transistor off and on and means R3, R4, R5, R6, R7 for applying bias voltages to the first and second electrodes of the transistor so that the first electrode has substantially the same D.C. potential as the second electrode. The gate circuit 5 may be used for muting in a F.M. stereo receiver. With the switch SM in the position shown and a signal received, by detector circuit 9 from the I.F. amplifier 3, which is above a predetermined level transistor 13 turns on and transistor 14 turns off so that the potential at 16 is applied via t3 to the gate of transistor Q so as to turn it on. This allows a signal to pass from frequency discriminator 4 to a F.E.T. amplifier 6. Circuit 7 removes pilot tone signal and the stereophonic signals are applied to speakers 24, 25. If the signal level is below the predetermined level, which may be adjusted by resistor 15, then transistors 13 and 14 are turned off and on so that the gate transistor Q is turned off and noise signals present are then prevented from passing to the amplifier 6. No muting is provided when the movable contact a of switch SM contacts c. In a modified embodiment of the gate circuit 5 (Fig. 3, not shown), where the inputs and outputs of the gate are connected to transmission lines (L1, L2), the equal potentials applied to the drain and source electrodes via (tp), R5, R3 and R7 are made to exponentially rise due to (Cp and Rp) when a switch (SW) of the power supply (P) is closed. Provided that a turn on control voltage is also applied to the gate electrode via t3 the transistor Q turns on until the voltages at the drain and source rise above a level (Vp<SP>1</SP>, Fig. 2, not shown) whereon the transistor is turned off. The circuit provides the capacitor C1 with substantially zero charge so as to eliminate the generation of noise on energizing the power supply. The F.E.T. Q may be a junction or insulated gate type.
Patent GB-653952-A (GB)
Title: Improvements in or relating to electron discharge devices
Inventor: CAIRNS JOHN EDWIN INGLISTON
IPC: H01J5/20
Filed: 1948-12-24
Abstract: An alloy suitable for sealing to glass comprises 42 per cent nickel, 6 per cent chromium and the remainder iron.
Patent GB-604891-A (GB)
Title: Improvements in forming and hardening devices for leaf or blade springs
IPC: C21D9/02
Filed: 1945-12-08
Abstract: 604,891. Making leaf-springs. JAMES, W. E., and BRAYSHAW, B. Dec. 8,1945, No. 33238. [Classes 83 (ii) and 83 (iv)] [Also in Group II] Bending-dies.-A device for forming and hardening leaf-springs comprises an upper member b with adjustable projections bl and a lower member c with adjustable projections cl. The members b, c are mounted on uprights d and are supported on springs d<SP>1</SP>, d<SP>2</SP> and located over an oil tank. Actuation of a lever e lowers the member b to shape the heat-treated workpiece a. Further depression of the lever compresses the springs d<SP>2</SP> to lower the spring into the oil in the tank to effect hardening.
Patent GB-1186278-A (GB)
Title: Simultaneous Dyeing and Tanning of Skins
IPC: D06P3/32
Filed: 1967-07-20
Abstract: 1,186,278. Dyeing and tanning skins. BADISCHE ANILIN-& SODA FABRIK A.G. 20 July, 1967 [22 July, 1966], No. 33310/67. Heading D1B. Skins are simultaneously dyed and tanned by treating with a water-soluble copolymer of a) 1-30% of a dye having in the molecule at least one polymerisable olefinically unsaturated group, b) 20-99% of acrylic acid, methacrylic acid and/or vinylsulphonic acid or an ammonium or alkali metal salt of one or more of these acids, c) 0-50% of at least one other comonomer. The dyestuffs used preferably contain acryloyl, acryloyloxy or acryloylamino groups. Dyes of the azo, azo metal complex and anthraquinone types and which contain acryloyl, acryloyloxy, or acryloylamino groups are particularly suitable. Copolymers of vinyl sulphonic acid acrylic and/or methacrylic acid or the alkali metal or ammonium salts of these acids as comonomers (b) are preferred to have at least 5% of vinylsulphonic acid.
Patent GB-1211916-A (GB)
Title: Sheet drying apparatus
Inventor: AMERY EDWARD GEORGE
IPC: G03D15/02
Filed: 1968-07-12
Abstract: 1,211,916. Drying webs. ILFORD Ltd. 16 July, 1969 [12 July, 1968], No. 33385/68. Heading F4G. A drier for sheet material has in a casing 1 an air permeable endless conveyer belt 4, driving means and supporting means for the belt and a space enclosed by the belt from which air is extracted, then passed to the inlet side of a fan 14 and heater 18 which causes it to be blown over the belt 4. The casing 1 has a material inlet port 2 bonded on one side by a fixed guide 16 and on the other by part of the belt and an exit port comprising a roller 9 pressing against the belt 4 which at that point is supported by a further roller 5. Photographic prints enter the drier through a narrow slot 2 and are held on the perforated neoprene, polypropylene, polyethylene terephthalate, or woven metal belt 4 by the pressure difference caused by the air being sucked from the space 10 via a duct 12-13 to the inlet side of the fan 14. The fan passes the air through a curved duct 15 over electric heaters 18 and the hot air is then blown over the belt 4. Curled prints are directed on to the belt 4 by a wire guide 16. The belt 4, driven by a roller 5 and supported by further rollers 6, 7 and a metal guide 8 carries the prints as they are dried by the hot air and radiant heaters 19. The prints leave the drier between a pair of rollers 5, 9 which effectively prevent air leakage through exit port 3. In a second embodiment, Fig. II, the endless belt 33 consists of a plurality of parallel spaced belts (50), Fig. III (not shown). Air from the sectioned space 40 is driven by a fan 41 over heaters 43 and then passes over the belt 33. Some of the air passes over the belt 33 and returns to the central compartment of the space 40 and some passes through the belt to return to the end compartments (40A, 40C). As the prints pass over metal bars 36 they are held on the band 33 by suction, but when the belt passes over the metal guide 37, dancer rollers 46 retain the prints.
Patent GB-525119-A (GB)
Title: Improvements in air-raid and like shelters
IPC: E04H9/10
Filed: 1938-11-17
Abstract: 525,119. Blast-proof shelters and buildings. BARTLETT, B. G. W. Nov. 17, 1938, No. 33456. [Class 20 (i)] A building for use as an air-raid shelter or to withstand earthquake shocks is formed with a convex undersurface and a low centre of gravity so as to roll or rock freely on a supporting surface. In one form, as shown in Fig. 1, the building 20 is formed of metal of spherical shape and is loaded at its bottom portion with concrete 22. A central cylindrical chamber 23 is formed internally for use, as a storage space to hold living and supply means and airconditioning apparatus, and this chamber is surrounded by tiers of seats 24 on which the occupants dispose themselves during air-raids. The structure is supported in concave recess 28 of larger radius of curvature than the structure or may be placed upon a specially prepared hardened surface of steel and concrete. A platform 25 to support a gun and crew may be provided near the top of the shelter. In a modification, the sides may be covered with concrete or enclosed sand-bags and bulges may be disposed at the lower portions of these sides in which bushes may be planted to camouflage the building. In a further modification, Fig. 4, the structure is of conical formation formed of concrete 62 and lined inside and outside with steel 63 and 56, respectively. Entrances 60 are also provided and the interior is provided with ventilation apertures 61 and may be subdivided. The outer surface of the shelter may be covered with a resilient skin of rubber and the upper portion formed as a water storage chamber so that if the skin is perforated the water will operate to extinguish fires in the vicinity.
Patent GB-1278692-A (GB)
Title: Improvements in or relating to ignition systems for internal combustion engines
IPC: F02B1/04
Filed: 1969-07-03
Abstract: 1278692 Ignition systems SIEMENS A G 3 July 1969 [4 July 1968] 33536/69 Heading F1B In an ignition system for an internal-combustion, the ignition spark gap 11 is connected to a secondary winding of a transformer whose primary winding 12 is connected to a potential source via an output transistor 22 whose conductivity depends upon the state of a switching transistor stage containing a controlled resistor 15 whose instantaneous value is dependent upon a magnetic field produced by a permanent magnet (not shown) which is movable relative to the resistor so as to provide repetitive short periods during which the resistor exhibits a high resistance, the permanent magnet being mounted to rotate with a shaft of the engine. The permanent magnet is eccentric to the axis of rotation or provided with a polepiece that is eccentric thereto. The controlled resistor is connected in series with a fixed resistor 14 to form a potential divider whose central tapping is connected to the base of a switching transistor 13 in the switching transistor stage, the controlled resistor being connected between its collector and base and the fixed resistor being connected between its emitter and base. Reference has been directed by the Comptroller to Specification 1105453.
Patent GB-1346236-A (GB)
Title: Connector with juxtaposable elements
IPC: H01R13/514
Filed: 1971-07-16
Abstract: 1346236 Two-part couplings SOCAPEX 16 July 1971 [20 July 1970] 33644/71 Heading H2E A connector with juxtaposable elements comprises a housing (Fig. 1a) having two open sides and a pair of ribs 5 extending along respective opposite side walls, a series of connector elements 2 comprising, for example, three male contacts 21 and three female contacts 22, housed in an insulating block having formed on each side a groove 4 for co-operating with the ribs 5 of the housing, and a metal locking component 7 with a crease 28 and three bosses 8 designed to fit into slots 9 in the housing. The connector is assembled by placing each connector element in turn in the housing in the portion along which the ribs 5 do not extend, and then sliding the connector element along the ribs (Fig. 3, not shown). When the required number of elements has been inserted, a packing piece, if necessary, is inserted and the locking component 7 is then force fitted into the housing, the resilient crease 28 forcing the elements against each other, the packing piece, and the opposite end wall of the housing, thereby locking the elements in the housing. The connector can be disassembled by forcing a tool, e.g. a screw driver, between the wall opposite to that adjacent the locking component, and the clamped members, this action causing the bosses 8 on the locking member to be resiliently urged out of the slots 9, thereby enabling the component 7 to be removed and the connector elements to be disassembled.
Patent GB-1093776-A (GB)
Title: Nuclear fuel elements
IPC: G21C3/64
Filed: 1965-08-06
Abstract: 1,093,776. Nuclear fuel elements. UNION CARBIDE CORPORATION. Aug. 6, 1965 [Aug. 7, 1964], No. 33674/65. Heading G6C. A nuclear fuel element comprises a graphite shell containing a core comprising a nuclear fuel material, a refractory matrix, expanded graphite, and a carbonized or graphitized binder. A mixture of pyrolytic carbon-coated uranium carbide particles, artificial graphite, liquid furfural-phenolic resin, and expanding graphite is pressed into a hollow graphite sphere, heated to 100 C. to cure the binder, and then baked at 1000-2000 C. to carbonize the binder and expand the graphite. The core is intimately bonded to the shell, so as to improve the strength and heat conductivity of the element. Expanding graphite may be prepared as described in United States Specifications 1,137,373 and 1,191,383. Other binders referred to are epoxy and phenolic resins and coal tar pitch. Alternatively, the core may be bonded to the shell by means of a carbonaceous cement containing artificial graphite, furfuralphenolic resin, and expanding graphite. Reference has been directed by the Comptroller to Specification 1,007,173.
Patent GB-765199-A (GB)
Title: Improvements in the production of hollow metal articles
Inventor: HIGNETT HAROLD WILLIAM GEORGE
IPC: B21C23/01
Filed: 1953-12-04
Abstract: A gas turbine blade is made from an alloy containing 18-21 per cent Cr, 0.5-1.8 per cent Al, 1.8-2.7 per cent Ti and nearly all the remainder Ni, or from an an alloy containing 18-21 per cent Cr, 15-21 per cent Co, 0.8-1.8 per cent Al, 1.8-2.7 Ti and nearly all the remainder Ni.  A core or filler for use in making the blade comprises a sintered body of powdered magnesium oxide dispersed in a matrix of pure iron, the magnesium oxide being from 5-25 per cent by weight of the whole filler.  The metal matrix may be of Fl, Ni, Co or Cr or an alloy thereof and the refractory material dispersed therethrough may be an oxide of Mg, Ti, Si, Al, Th, Zr or Ca or sillimanite.
Patent GB-325509-A (GB)
Title: Improvements relating to the manufacture of synthetic menthol
IPC: C07C35/12
Filed: 1928-11-19
Abstract: 325,509. Howards & Sons, Ltd., Blagden, J. W., and Huggett, W. E. Nov. 19, 1928. Menthol.-Crude synthetic menthol, obtained by the hydrogenation of thymol, menthone, piperitone, pulegone, &c., is purified by converting the isomeric alcohols present into a mixture of acid esters of a polybasic acid, then washing the ester mixture with-or crystallizing it froma saturated liquid hydrocarbon or hydrocarbon mixture substantially free from unsaturated hydrocarbons, and finally saponifying the residue or the crystallized product. A crystalline synthetic menthol of good purity is thereby isolated, whilst the acid esters of its isomers remain dissolved in the hydrocarbon. The esterification is preferably performed with phthalic acid or its anhydride. The saturated hydrocarbons employed may be of the aliphatic or cyclic series, the following being given as examples :-Cyclohexane, methylcyclohexane, decahydronaphthalene, petroleum ether and other petroleum distillates which are, or have been rendered, substantially free from unsaturated constituents. The menthol purification process is advantageously applied in combination with the processes of partial esterincation and partial saponification described in Specification 297,019, and the esters dissolved out by the hydrocarbons may be recovered, and, after saponification, subjected to the hydrogenation treatment described in Specifications 213,991 and 238,314. Examples are given. Specifications 189,450, 289,125 and 289,126 also are referred to.
Patent GB-1489864-A (GB)
Title: Spirometer for recording a plot of the volume of expiration flow of a patient
IPC: A61B5/093
Filed: 1976-08-16
Abstract: 1489864 Spirometers THERMO ELECTRON CORP 16 Aug 1976 34005/76 Heading ASK [Also in Division G1] A spirometer for recording a plot of the volume of expiration flow of a patient comprises a casing 10, 12 defining a chamber, a piston 14 mounted in said chamber and dividing the latter into a lower compartment 22 for receiving exhaled air through opening 28 and an upper compartment 24 open to the atmosphere, a plate 34 having clips 36 for holding a paper recording cord 38, said plate 34 being mounted on piston 14 by means of posts 32 which bear on guides 30 attached to upper casing 12, and a pen 42 mounted on a holder 44 which is driven at a constant rate by screw 46 driven by a synchronous motor in housing 54, whereby a plot of expiration volume versus time may be produced. A rolling membrane 20 is secured between piston 14 and the upper and lower casings 12, 10 to provide a seal between compartments 22 and 24. The motor is controlled by a control circuit, Fig. 2 (not shown) movement of the pen from left to right in Fig. 1 being controlled by a piston movement switch 74 and a flow switch, Figs. 3a+b (not shown), which comprises a hinged cone attached to a tab whereby air flow moves the tab out of a light beam to activate the switch. The piston movement switch 74 and the flow switch are in parallel. Movement of the pen from right to left is controlled by a further switch, during this return movement the pen 42 is pulled off the cord 38 by the rotation of screw 46. The synchronous motor may be replaced by a motor with a variable speed and means to vary that speed in a predictable manner during a traverse.
Patent GB-981676-A (GB)
Title: Fastener device for assembly in an aperture in a support
IPC: F16B5/12
Filed: 1962-09-05
Abstract: 981,676. Stud and socket fasteners. GOBINDAUDE S.A. Sept. 5, 1962 [Sept. 5, 1961], No. 34076/62. Heading E2B. [Also in Division F2] A sleeve 10, e.g. of synthetic resin, has one end 16 divided into segments 18, Fig. 1, while its other end 20 is reduced in diameter to engage a groove 30 in a core pin when the sleeve and pin are assembled before use, Fig. 3, and to engage a groove 28 when the assembly is inserted, Figs. 4, 5 (not shown), in a hole and the sleeve clamped to the hole wall by an enlargement 34 on the pin adjacent its head 26. When the assembly is finally secured in the hole 40, Fig. 6, with a moulding strip 38 pressed down on the pin head 26, the pin slides further down so that the groove 28 rides out of the sleeve end 20 which is then distended as shown while the strip edges 42 ride over chamfered tops of the segments 18 and a taper 27 on the head 26 splays the segment tops to grip the edges.
Patent GB-301653-A (GB)
Title: Improvements in or relating to inner soles or socks for boots and shoes
IPC: A43B17/10
Filed: 1927-12-16
Abstract: 301,653. Eastern & Continental Trading Co., Ltd., and Pearce, C. Dec. 16,. 1927. Insoles and socks.-An insole or sock designed to protect the foot from damp penetrating between the sole and upper of a shoe comprises a layer 12 of soft fabric, a layer 11 of oiled silk, a thin sole 10 of cardboard, a layer 13 of rubber, and a layer 14 of oiled silk. The layers increase progressively in dimensions from top to bottom of the composite insole, so that the margin 14a of the waterproof layer 14 extends upwards against the upper 15 and is held out against the upper by the rubber margin 13a. The layers are united by cement or stitches. A top layer of spongemay be added.
Patent GB-507155-A (GB)
Title: Improvements in safety pins
IPC: A44B9/14
Filed: 1937-12-09
Abstract: 507,155. Safety-pins. CATTLE, E. F. Dec. 9, 1937, No. 34101. [Class 43] In a safety-pin having a head comprising a tongue 5 extending into the space between the limbs of. a J-shaped shield 6, the free ends of the limbs are indented from edge to edge to form ribs 7 extending towards the tongue so that definite and similar manipulation of the pin 1 is required to pass it between a rib and the tongue in opening or closing the pin.
Patent GB-836704-A (GB)
Title: Improvements relating to composite resilient materials and their production
Inventor: TAGGART RICHARD VINCENT
IPC: B32B27/00
Filed: 1955-11-30
Abstract: A composite resilient article comprising a body of resilient polyurethane foam faced with a flexible layer of non-cellular synthetic resin composition or non-cellular natural or synthetic rubber composition is made by (a) providing on a supporting surface afforded by a mould a layer comprising a synthetic resin or rubber composition or a precursor of such a composition which at least on its accessible surface is in a fluid condition, (b) providing a body of resilient polyurethane foam on the accessible surface of this layer, and (c) causing or allowing the layer first provided to undergo conversion into a wholly solid synthetic resin or rubber composition layer.  The facing layer, when of synthetic resin composition, may be formed from a plastisol consisting of a vinyl chloride polymer or copolymer dispersed in a finely divided state in a plasticizer, preferably in two steps in the first of which one or more coats of plastisol are applied, heated to homogenise the resin and plasticizer, and allowed to cool and solidify, and in the second of which a further coat of plastisol is applied forming the accessible surface in fluid condition.  A gellable, vulcanizable, compounded aqueous rubber dispersion may be used analogously. Coloured or multicoloured effects may be obtained by incorporating one or more coloured pigments in one or more of the plastisol coats making up the surface layer which may also include embedded fibres such as cotton flock.  In an example, a plastisol comprising polyvinyl chloride, a vinyl chloride-vinylidene chloride copolymer, pigment, and stabilizer, dispersed in a phthalate ester plasticizer is applied to a shallow steel mould embossed with a decorative pattern.  The mould is heated to homogenise the plastisol and is then cooled to form a solid resin layer.  A second coating of plastisol is applied over the resin layer and a pre-shaped sheet of polyurethane foam laid in place on top of the second plastisol coat and gently pressed into it.  The mould is again heated and allowed to cool, after which the vinyl resin coated polyurethane foam product is carefully extracted.
Patent GB-1044547-A (GB)
Title: Improvements in or relating to methods of and apparatus for producing printing blocks particularly intaglio printing blocks
IPC: B23K26/08
Filed: 1963-08-30
Abstract: 1,044,547. Removing metal by laser beams. R. HELL. Aug. 30, 1963 [Sept. 1, 1962], No. 34415/63. Heading B3V. [Also in Division H3] In the production of printing blocks from single coloured or multi-coloured picture or text originals by photo-electrically scanning the originals and removing material from the surface of the blocks under control of the scanning, the material is evaporated from the surface by a very highly bunched monochromatic bundle of light rays of high power density, particularly a laser beam, focused on the surface and modulated by the photo-cell signals. The process is applicable to the making of relief or preferably intaglio printing blocks with or without screening. In one embodiment for making a screened block, Fig. 1, an exchangeable cylinder 3 rotated by motor 1 carries the original 4 and the printing block material 5. The original and the block may be on separate synchronized machines. Scanning is effected by a point light source 6 focused by lens 7 and the reflection is passed through lens 8 to a photo-cell 9 whose signals amplified at 10 control a Kerr cell 11 in the path of a laser beam emitted from a laser crystal 17. This may be a synthetic ruby doped with chromium ions or of fluorspar doped with samarium or uranium ions. The Kerr cell thus modulates the lightintensity from the laser which is focused on the block material 5 by lens 14. Crystal 17 and a cylindrical flashlamp 16 are mounted on the focal lines of an elliptical mirrored chamber 15. The xenon flashlamp 16 is fed with constant pulses at the same frequency -as the screening from a high voltage generator 18 and a scanning stage 26 controlled through an amplifier 25 by a photocell 24 receiving light pulses from source 21 through a disc 19 on the motor shaft, having alternate opaque and transparent sections 20. In another embodiment. Fig. 2 (not shown), the laser beam has pulses of a constant amplitude and variable duration. The scanning signals from photo-cell 9 are fed to a scanner 27 which receives constant duration pulses from disc 19 and photo-cell 24. The variable amplitude pulses are transformed at 28 into time modulated pulses of constant amplitude. The laser crystal may be cooled with liquid air and the printing cylinder may also be cooled. Alternatively a gas laser may be used particularly for continuous emission processes. A plurality of scanning devices and lasers may be used.