baber/WOPTO huggingface dataset:
Patent GB-700240-A (GB)
Title: Improvements in electric oscillation generating devices utilizing semiconductor amplifiers
IPC: H03B5/12
Filed: 1949-12-29
Abstract: 700,240. Semi-conductor circuits for generating oscillations. WESTERN ELECTRIC CO., Inc. Dec. 29, 1949 [Dec. 29, 1948], No. 33224/49. Class 40 (6) An electric oscillation generator comprises a back-coupled semi-conductor amplifier with an input terminal output terminal and a common terminal, and the feedback path includes impedance matching means adapted to match the output impedance of the amplifier to the input impedance and the load taken together. The load circuit is coupled to the emitter electrode of the back-coupled amplifier. Fig. 1 shows a transistor comprising a semi-conductor block 1 having an emitter electrode 2, collector electrode 3 and a base electrode 4. A tuned circuit 6, 7 is included in the collector circuit, and positive feedback is provided by connecting a tap on inductance 6 to the emitter electrode so that oscillations are produced, the load resistance RL1 being connected between the emitter and base electrodes. An equivalent circuit including the internal impedances of the transistor, is shown and analysed to show how the position of the tap on inductance '6 may be calculated so that the output impedance is matched to the impedance of the input circuit, the tuned circuit and the load. The allocation of power output between the tuned circuit and the load is also discussed. The arrangement ensures that the power supplied to the emitter is just equal to that necessary to maintain oscillations. An alternative circuit is described in which matching may also be achieved, wherein the coupling is taken from the intermediate point between two condensers which replace condenser 7. Fig. 4 shows an alternative arrangement, in which the inductance of the tuned circuit is used to provide transformer coupling to the emitter circuit, and in this circuit the bias for the emitter is effectively produced by resistance 23 in the base electrode circuit as described in Specification 694,025. Resistance 25 is included in series with the emitter to prevent spurious oscillations due to feedback from the base electrode resistor 23 at low frequencies. A further modification, Fig. 5 (not shown), is described, uilizing transformer coupling, in which the resonant circuit in the collector circuit is replaced by a series resonant circuit in the emitter lead. The method of producing a suitable semi-conductor block, including etching, anodic oxidization treatment, and an electrical forming process, is described, reference being made to Specifications 592,260, 592,303, 595,601, 632,942, 632,980, 669,399, 694,021, 694,022, [Group XXXVI], 694,025 and 694,026. Specification 700,237 also is referred to regarding equivalent networks for transistor circuits.
Patent GB-795829-A (GB)
Title: Improvements in or relating to friction clutches
Inventor: CROFT ARTHUR
IPC: F16D13/70
Filed: 1955-11-22
Abstract: 795,829. Friction clutches. CROFTS (ENGINEERS), Ltd. Nov. 21, 1956 [Nov. 22, 1955], No. 33423/55. Class 80 (2). Barrel-shaped rollers 22 are wedged radially inwards in complementarily shaped grooves 21, 27 in plates 18, 24 by axial movement of a control collar 28 to engage a friction cone or, as shown, disc clutch 3-5. The rollers 22 are mounted on a spring retainer ring 34. The plate 18 is secured by a snap ring to the hub 1 of the clutchplate 4. The plate 24 is axially movable upon the hub 1 and is screwed into a split adjusting collar 24a abutting one of the clutch discs 3. A clamping screw 25 secures the adjusting collar 24a to the hub 24. The position of the adjusting collar 24a upon the hub 24 is varied to compensate for wear in the clutch. The clutch discs 5 are in splined engagement with a ring 9 secured by screws to a disc 10 bolted to a driven shaft 15. By removing the screws and bolts, the ring 9 and disc 10 can be easily displaced to check the alignment of the driving and driven clutch shafts 13, 15. The clutch discs 5 are split so that they can be removed when the ring 9 has been taken off the clutch.
Patent GB-872602-A (GB)
Title: Improvements in flying control systems for aircraft
Inventor: WESTBURY ROY
IPC: B64C13/00
Filed: 1957-10-25
Abstract: 872,602. Fluid-pressure servo motor-control systems. HOBSON Ltd., H. M. Oct. 27, 1958 [Oct. 25, 1957], No. 33437/57. Class 135. [Also in Group XXXIII] In an aircraft flying control system a control surface is split into two sections, each section being provided with a pair of hydraulic actuators 10, 10A, the actuator control valves 13, 13A being coupled to a common pilot's control member by individual mechanical linkages 16, 16A, each linkage including a normally inoperative lost-motion connection, such as a spring box 17, permitting in an emergency, movement of the linkage in either direction in relation to the control valve. The actuator pistons 11, 11A are secured to the aircraft structure and the moving cylinders are attached to the control surface section. Floating lever type follow-up is provided for the control valves by means of levers 14, 14A. In order to prevent flutter in the event of a control valve seizing the supply line to each servo-control valve is provided with a non-return valve 20 to prevent movement of the jack due to aerodynamic forces. A restrictor 21 is placed in parallel with the non-return valve to permit the control surface to gradually assume a trailing position. The pistons 11, 11A may be of the differential area type. Each actuator may be supplied with motive fluid from an independent source.
Patent GB-874497-A (GB)
Title: Tempering of glass sheets
IPC: C03B27/044
Filed: 1959-10-02
Abstract: 874,497. Tempering glass. PITTSBURGH PLATE GLASS CO. Oct. 2, 1959 [Oct. 2, 1958], No. 33460/59. Drawings to Specification. Class 56. When tempering a glass sheet supported horizontally in a. bending mould, using apparatus such, for example, as described in Specification 771,036, the fluid blasts applied below the sheet are arranged to exert a force on the sheet greater than that exerted by those applied above by an amount less than the weight of the sheet. This may be achieved by arranging the lower jets closer to the sheets or supplying them with greater fluid pressure, or both.
Patent GB-1526658-A (GB)
Title: Method of preparing 2,6-ditert butylphenol
IPC: C07C27/00
Filed: 1977-08-10
Abstract: 1526658 Preparation of 2,6-di-tert-butylphenol STERLIT OPYTNO PROMYSH NEFTEKHIM ZAVOD and NOVOKUIB FILIAL GIPROKAUCH 10 Aug 1977 [11 Aug 1976] 33496/77 Heading C2C 2,6-Di-tert-butylphenol is prepared by effecting alkylation of phenol with a mixture of isomeric butenes in the presence of mono-tertbutylphenol and a catalyst which is aluminium dissolved in phenol, the mono-tert-butylphenol being added in an amount such that the concentration of the starting phenol does not exceed 80 mol. per cent, while gradually lowering the process temperature from 120 to 50 C. and reducing the concentration of isobutylene preferably from 80 to 1À5 mol. per cent in the mixture of isomeric butenes, followed by isolation of the desired product.
Patent GB-190632-A (GB)
Title: Improvements in and relating to lubrication indicating devices connected with bearings
IPC: F16N29/04
Filed: 1921-12-14
Abstract: 190,632. Adams, J. W., and Pickles, T. W. Dec. 14, 1921. Stop-gear.-A device for operating a stopmotion on cessation of flow of lubricant comprises a balanced lever A mounted in a casing C between an inlet 0 and an outlet 0' and arranged to complete an electric circuit operating a stopmotion on cessation of flow, the lever having a channelled arm to receive the lubricant, the oil flowing along the arm and over the end A' to the outlet. Oil accumulating in the arm weighs it down and breaks the contacts B, B'. In order to prevent oscillation of the lever under slow feed, the outlet O<1> is dished at O<2> at the same inclination as the lever, so that oil creeping under the end of the lever causes adherence. The outlet O<1> which is adjustable, is of larger diameter than the inlet 0. The lever is provided with an adjustable balance-weight S.
Patent GB-648953-A (GB)
Title: Improvements in and relating to straight bar knitting machines
IPC: D04B15/64
Filed: 1945-12-12
Abstract: 648,953. Knitting-machines. WHYTE & SMITH, Ltd., SMITH, T., HALL, I., and WOOLLEY, G. H. Dec. 12, 1945, No. 33568. [Class 74 (ii)] A straight-bar knitting-machine has a thread layer constructed and arranged to lay its thread in opposite directions along the line of needles by an oscillatory movement about a pivot ; and means for displacing the pivot in the direction of the line of needles during said movement. An unknitted elastic weft thread 7 is laid in between the rib and plain loops of desired courses by a thread layer 5, which swings out from one selvedge, over and down to the other selvedge. The layer is swung by reciprocation of a pinion 20 along a stationary rack 19, the reciprocation being produced by a driving rod 21 (which may be a carrier rod with the carrier removed) operated through its own draw mechanism, which may be rendered inoperative, when desired, by rocking a bluffing lever 27 to act on that end of a connecting rod 26 normally engaging a pin 25. As the layer starts its swing (when the draw is nearly complete), the yarn 7 is held by a spring trapper 14 carried by the frame needle bar and it is also carried over the curved top of a deflector 18. At the end of the draw, the moving layer withdraws the yarn from the trapper and, as the layer is ending its swing, the thread slips off the deflector and snaps down on to the fell of the fabric. The layer is speeded up for the final portion of its travel. The yarn passes to the layer from a tension device comprising a pair of spring-pressed cymbals 9 and a pair of rollers 10, one of which is on a spring-pressed arm 11. The trapper 14 comprises a fixed leaf-spring 15 pressed against a pivoted, spring influenced block 16.
Patent GB-1475630-A (GB)
Title: Jet burner assembly
IPC: F23D11/38
Filed: 1975-08-12
Abstract: 1475630 Burners DANFOSS AS 12 Aug 1975 [14 Aug 1974] 33573/75 Heading F4T A jet burner assembly comprises a fuel supply pump 1, a fuel outlet nozzle 6, and an electro-magnetically operated valve 5, the outlet of the pump being connected by a pipe 4 to the inlet 12 of the valve, and the outlet 13 of the valve being connected to the nozzle 6, the housing of the valve having means 19 receiving the pipe, and a screw-threaded sleeve 21 receiving the nozzle. Pump 1 is driven by an electric motor 7 and drives a fan 8 which delivers air through a passage 9 to an orifice 10. Nozzle 6 carries a filter 24 and a valve seat 25 is screwed into a sleeve 17 of non-magnetizable material. The valve closure member 31 is closed by a spring 29, and is opened by a coil 14.
Patent GB-1071579-A (GB)
Title: Improvements in or relating to devices for wrapping wrapped connections
Inventor: SILINS ALEKSANDRS
IPC: H01R43/033
Filed: 1964-08-18
Abstract: 1,071,579. Wrapping wire on terminals. GENERAL ELECTRIC CO. Ltd. Aug. 9, 1965 [Aug. 18, 1964], No. 33702/64. Heading B3E. Apparatus for wrapping wire around a terminal comprises a spindle with an axial hole at one end to accommodate the terminal, guide means at said end having an elongated aperture to guide the wire to the terminal, cutting edges on the aperture serving to strip the insulation from the wire as the wrapping proceeds and wire-cutting means. Wire to be wrapped around a terminal positioned in an axial hole in a spindle 4a is laid in a peripheral aperture 7 in a disc 3 on the end of the spindle, through a slot 19 in a collar 15 on the spindle, and through aligned key-hole sectioned grooves 13, 14 in discs 10, 11, so that the wire extends at a slight inclination to the axis of the spindle. The aperture 7 is formed with cutting edges which serve to strip the insulation from the wire as it is wrapped on the terminal by rotation of the spindle. The aperture 7 may be of L-shaped section. The disc 10 is secured to the spindle and the disc 11 to a sleeve 12 held stationary so that, at the commencement of the wrapping, rotation of the disc 10 relative to the disc 11 severs the wire. A projection 9 on the front face of the disc 3 applies the end part of the wire to the terminal. The tool may be operated by means which automatically stops the rotation of the spindle after each operation so that the grooves 13, 14 are in alignment.
Patent GB-913709-A (GB)
Title: Improvements in or relating to portable swimming pools
IPC: E04H4/00
Filed: 1959-10-05
Abstract: 913,709. Swimming pools. CAVE-BROWNECAVE, T. R. Oct. 5, 1960 [Oct. 5, 1959], No. 33720/59. Class 26. A portable swimming pool, (Figs. 1, 3 and 5), comprises the combination of a rectangular framework and a water inpermeable sheet suitable for folding to form a rectangular container fitting therewithin, each side 6 having an edge extension for folding over a framework component 1, and the corner fold providing flaps 10 to fold about a component 2. The framework is made up of frames detachably secured one to the other, there being an additional component 3 in one frame at each corner to form a slot thereat through which the flaps are passed. Rods 12 are disposed in hems 11 in the edge extensions of the sides of the sheet and engage under hooks 14 on the components 2 at the corners to fix the sides, the tightness of the container sides being thus adjustable. The end frames have an intermediate component 2 to attach to it a cord 13, to tighten the corner flaps, engaging eyelets in the sheet fabric to fasten it to this component 2, or it may be fastened to eyelets on the upper component 1 of the end frame. The lower member 1 of one end frame has an offset portion forming an opening for a container discharge pipe 16. The components 2 have attached eyes through which a coupling pin may be passed to join two frames, which may also be passed, where desired, through eyes on the member 2 of a side spur 15. The pool may have ladder attachment, (Fig. 7), comprising two inverted-U frames 24 with crossbars 25 for steps and attaching brackets 26, 26<SP>1</SP> with studs 27 to engage with sockets 28 on two uprights 20, joined by a crossbar 22, on a modified end frame, and providing a space for a discharge pipe 30. The sheet may be fabric impregnated with rubber or synthetic resin, or synethetic resin reinforced with fabric.
Patent GB-1010607-A (GB)
Title: Method of manufacturing control rods for nuclear reactors
IPC: B21C1/24
Filed: 1962-09-04
Abstract: 1,010,607. Reactor control rods. ALLMANNA SVENSKA ELEKTRISKA A.B. Sept. 4, 1962 [Sept. 11, 1961], No. 33806/62. Heading G6C. [Also in Division B3] In producing a control rod for a nuclear reactor by cladding an element of neutron absorbing material comprising a silver alloy containing one or both of cadmium and indium with a layer of steel, the steel with a thin layer of copper attached thereto is applied in contact with the element with the copper layer towards the element and the assembly is subjected to a heat treatment of at least 500‹ C. but not above the temperature at which the pure neutron absorbing material begins to melt. The element may consist of silver and up to 35%, e.g. 30% cadmium, or 65-85% silver, 2-20% indium and 0-10% cadmium. The temperature of heat treatment is such that an alloy forms between part of the copper and the element. A tube 1 of 80% silver, 15% indium and 5% cadmium is surrounded internally and externally by two nickel chromium stainless steel tubes 2, 3 provided electrolytically or chemically with nickel coatings 6, 7 and copper coatings 8, 9, the tubes are forced through a die 4 over a plug 5 to effect tight contact between the tubes and the assembly is heated at 600‹ C. for 2 hours. Rings of steel are finally welded on the ends of the rods. In a modification flat steel plates coated with nickel and copper are rolled on to an intermediate neutron absorbing plate before heating. Rods of cross shape may be produced and the steel may be provided only on some surfaces.
Patent GB-1219537-A (GB)
Title: Fastener for securing an apertured member to an apertured support
IPC: F16B29/00
Filed: 1969-07-04
Abstract: 1,219,537. Fastenings. UNITED-CARR Inc. 4 July, 1969 [31 July, 1968], No. 33855/69. Heading E2B. [Also in Division F2] A stud fastener for resiliently holding an apertured. plate 34 on an apertured support 36 comprises an elastomeric sleeve 4 having a flange 10 for location between the plates 34 and 36 and a stud 5 having a heads 16 and 24, 40 which serves to compress the sleeve. The sleeve may be of polyurethane rubber. The cross-head 24 lies in a recess 14 in the flanged end of the sleeve. The head 16 has a spanner-end 18 and a flange 20, while the other end has lugs 28 which enter holes 40 in the support plates for location. The stud may be of acetal resin or metal. The sleeve is moulded on to the stud which is previously coated with a non-stick material, but the sleeve adheres to a sheet-metal washer 32 for radial strength, or alternatively the sleeve may be bonded to flange 20. Notches 30 indicate the angular position of the stud 5.
Patent GB-1390805-A (GB)
Title: Electrographic apparatus
IPC: G03G15/09
Filed: 1972-07-20
Abstract: 1390805 Electro-photographic apparatus INTERNATIONAL BUSINESS MACHINES CORP 20 July 1972 [20 Aug 1971] 33913/72 Heading G2H In an electro-photographic apparatus, in which a charged photo-conductive surface on a drum 10 is imaged by a cathode ray tube 15, the developer mix of magnetic carrier and toner particles is applied in a cascading stream from a horizontally mounted rotatable cement-mixer like drum 18. The movement of the mix in an upward direction in the drum is aided by permanent or electric magnets 30 located outside the drum. These magnets may be so arranged and, if electric; operated such that differing predetermined widths of the drum may be supplied with developer mix and thus effect an economy of mix when narrow sheet copies are to be produced. A detector 29 adjacent the cascading stream determines the quantity of toner and, through control means 25, automatically actuates a toner replenishment device 22. A row of individually operable electromagnets may also be placed across the top of the path of the cascading stream to thereby add further control to the developing process.
Patent GB-622951-A (GB)
Title: Improvements in or relating to grinding, polishing, and like machines
IPC: B24B17/00
Filed: 1946-11-15
Abstract: 622,951. Grinding and polishing. POWER JETS (RESEARCH & DEVELOPMENT), Ltd., and LEEDHAM, L. H. Nov. 15, 1946, No. 33921. [Class 60] In a copying machine for grinding, polishing or like finishing blades for gas turbines, compressors or the like, the tool, such as a grinding wheel 11 and a tracer 14, are mounted on a link 8 pivotally secured by a pin 16 to one end of a beam 7 the other end of which is formed as a sleeve 6 slidable on a prismatic bar 5 pivotally mounted in the machine frame. The grinding wheel is driven by belts 18, 19 from an elongated pulley 17. The link 8 is provided with handles 20; counterbalances may be provided.
Patent GB-194426-A (GB)
Title: An improved hat fastener
IPC: A42B7/00
Filed: 1921-12-16
Abstract: 194,426. Turner, H. Dec. 16, 1921. Hats, securing to head.-A lady's hat fastener comprises a spiral coil a of wire looped or bent double on itself, the ends of the wire being disposed at the centre of the coil and the bent part forming the outer end of the spiral. A strip f of tape or other flexible fabric passes through the loop in the wire and is secured to the hat. The outer end d of the spiral is out-turned so that, on rotation of the device by a knob c outside the hat the coils pass from behind to the front of the tape and engage the hair of the wearer. The loop d and the inner secured ends of the wire act as stops, engaging the edge of the tape f in extreme positions of the spiral. A second strip g may be provided to cover the coil in the out-of-use position shown.
Patent GB-1166528-A (GB)
Title: Improvements in and relating to Heating Elements and Resistors
Inventor: COOPER PETER JOHN FREDERICK
IPC: H05B3/26
Filed: 1967-07-24
Abstract: 1,166,528. Electrically conductive laminates. LANGLEY LONDON Ltd. 24 July, 1968 [24 July, 1967; 12 July, 1968], Nos. 33960/67 and 33494/68. Heading B5N. [Also in Divisions H1 and H5] A heating element or resistor 1 comprises an etched resistance metal foil pattern 2 sandwiched between silicone resin - impregnated layers 3 of mica, built-up mica or mica paper, the pattern providing terminals 4 and an extended electrically conducting path 5 between them, the assembled element 1 being cured under heat and pressure to bond it into a homogeneous sheet. The foil 2 may be etched on a mount comprising a film of a partially-cured silicone resin, which is resistant to the etching acid, the mount being incorporated in the homogeneous sheet. Alternatively the mount may be an acidresistant polyethylene film which is stripped from the foil pattern before the bonding of the assembled element 1 into the homogeneous sheet. The bonding is carried out in two stages; the final cure may be carried out in situ in the electrically heated appliance, e.g. kettle, cooker, toaster, space heater, water heater or iron. The foil 2 may be a nickel chromium alloy, nickel iron, chromium iron or copper nickel alloy. The foil thickness is 0.0005-0.002 inch.
Patent GB-760344-A (GB)
Title: Mouldable masses and moulded bodies produced therefrom
IPC: C08F265/06
Filed: 1953-12-07
Abstract: 760,344. Monomer/polymer mixtures; dental mouldings. FARBENFABRIKEN BAYER AKT.-GES. Dec. 7, 1953 [Dec. 6, 1952], No. 33987/53. Class 2 (6). Moulded bodies, e.g. dental prostheses, are made by polymerizing in a mould a plastic doughy mixture comprising finely-divided polymers of one or more monomers containing one or more )C=C( groups and 30 per cent by weight or less, of a liquid monomer or partially polymerized monomer, the finely-divided polymers consisting of a major proportion of at least one polymer (A) which is of such a chemical composition and degree of fineness that it takes up its portion of the monomer or partial polymer in more than 8 minutes and a minor proportion of at least one other polymer (B) which has a different chemical composition and takes up its portion of the polymerizable liquid in less than 2 minutes. The liquid monomer or partial polymer may be methyl methacrylate, which may contain minor amounts of compounds containing more than one polymerizable double bond. Polymer (A) may be polymethyl methacrylate, and copolymers of methyl methacrylate and dodecyl methacrylate and/or acrylonitrile and/or divinyl benzene. Polymer (B) may be a copolymer of methyl methacrylate and acrylates, a copolymer of methyl acrylate and butadiene, polyvinyl chloride, or afterchlorinated polyvinyl chloride. The polymeric materials may contain dyestuffs, pigments, and plasticizers and the polymerization effected in the presence of catalysts such as benzoyl peroxide, sulphinic acid, and mixtures of peroxides, sulphinic acid and amines. Specification 701,122 is referred to.
Patent GB-1173933-A (GB)
Title: Improvements in or relating to Vehicles Supportable on a Cushion of Air
IPC: B60V1/16
Filed: 1967-07-25
Abstract: 1,173,933. Air-cushion vehicles. PNEUMATIQUES, CAOUTCHOUC MANUFACTURE ET PLASTIQUES KLEBER-COLOMBES. 25 July, 1967 [25 July, 1966], No. 34097/67. Heading B7K. A skirt for an air-cushion vehicle is reinforced by the provision of outer and inner layers of threads bonded to an intervening layer of elastomer and coated on each -face with a layer of elastomer, the threads of the two layers being so oriented as to resist the components in the vertical and transverse planes of the stresses to which the skirt is subjected.