baber/WOPTO huggingface dataset:
Patent GB-1150546-A (GB)
Title: Negative Impedance Converters
Inventor: MEACHAM LARNED AMES
IPC: H03F3/62
Filed: 1966-05-26
Abstract: 1,150,546. Transistor negative impedance converters; negative impedance repeaters. WESTERN ELECTRIC CO. Inc. 26 May, 1966 [14 June, 1965], No. 23534/66. Headings H3T and H4R. A negative impedance converter comprises effectively at least two transistor devices of opposite conductivity type interconnected to produce a combined current-voltage characteristic having a portion with a negative slope and means for biasing the combination in the region of negative slope: PNP and NPN transistors Q1, Q2 respectively have their bases and collectors cross-connected, the bases being biased from a potentiometer network R1, R2, R3 connected between the emitter terminals 1, 2; a negative impedance appears across terminals 1, 2, when the arrangement is suitably biased, proportional to the positive resistance R3. The transistors may be replaced by a single PNPN transistor (Fig. 3A, not shown). The arrangement may be linearized by means of negative feedback, produced by insertion of resistors in the emitter leads (Fig. 4, not shown), and resistor R3 may be shunted by a capacitor in order to stabilize arrangements using the converter. In a further modification, each transistor is replaced by a Darlington pair (Fig. 5, not shown). In a further modification, amplifying transistors of opposite conductivity type are inserted in the base connection of each of the transistors (Q1a, Q2a, Fig. 6, not shown). Converters of the type described may be inserted at regular intervals in both leads of a long telephone transmission line, preferably being spaced a quarter-wavelength apart at the highest operating frequency.
Patent GB-140328-A (GB)
Title: Improved charging means for use with siemens and other metallurgical furnaces
IPC: F27D3/00
Filed: 1919-09-25
Abstract: 140,328. Bacon, N. H. Sept. 25, 1919. Charging.-In an apparatus for charging open. hearth and like furnaces, two runner blocks d, f, which can be connected by reds or chains to an overhead support e and to the floor or staging in front of the furnace respectively, are mounted on the charging-pan bar a. In operating the device, the connexion between the block f and the floor is made after the pan c has been brought up to the furnace mouth. The bar can then be operated and the charge deposited at the required position without overbalancing. Ball-bearing rings may be used instead of runner blocks, and the bar a may be telescopic.
Patent GB-303776-A (GB)
Title: An improved process for the production of high viscosity oils from mineral oils and tar oils of any origin
IPC: C10G32/02
Filed: 1927-09-08
Abstract: 303,776. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Sept. 8, 1927. Mineral and tar oils.-The viscosity of mineral oils of any origin is increased by subjecting them in the coherent liquid phase to high tension electric treatment with alternating currents of frequency substantially above 500 cycles per second, but less than 10,000 cycles. Ionizable substances, such as alcohols, phenols, &c. are preferably excluded. E.g., a middle fraction of a cracked brown coal tar oil of viscosity 1.2 Engler is treated for 30 hours at 12,000 volts, 7,000 cycles under an absolute pressure of 0.01 atmos. The resulting oil has a viscosity of 125.
Patent GB-1075663-A (GB)
Title: Improvements in or relating to clinching apparatus
Inventor: TRIBE THOMAS FRANCIS
IPC: B21D39/02
Filed: 1964-06-08
Abstract: 1,075,663. Seaming. BRITISH FEDERAL WELDER & MACHINE CO. Ltd. Sept. 8, 1965 [June 8, 1964], No. 23690/64. Addition to 958,672. Heading B3J. Clinching apparatus of the type in which the panels 4, 5 lie on a bed or cradle 3 and the bending-over operation and the clinching operation are performed in sequence by separate pre-forming and clinching members 17 and 10 is characterized in that the clinching member 10 is supported for movement by a parallelogram linkage 7, 8 and the preform member 17 is connected by a link arm 18 directly to one of the links 8 of the parallelogram linkage so as to constitute a toggle linkage by which the pre-form member is operated, so that during a first part of the advance movement of the clinching member 10 the pre-form member 17 is advanced to bend over the upstanding marginal flange 6 and is then withdrawn whereupon, during a second part of the advance movement of the clinching member 10 the bent-over flange 6<SP>1</SP> is clinched while the pre-form member 17 remains withdrawn. The clinching member 10 is lowered by hydraulic means 11. The link 8 may be adjustable in length and its pivoted connection with the link arm 18 may also be adjustable.
Patent GB-1536384-A (GB)
Title: Method for producing an ion filter for a mass analyser
IPC: H01J49/42
Filed: 1977-06-03
Abstract: 1536384 Mass analysers LEYBOLDHERAEUS GmbH & CO KG 3 June 1977 [8 June 1976] 23720/77 Heading H1D A method of producing an ion filter for a mass analyser comprises producing at least two elongated parts of insulating material, grinding to impart one or more surfaces of hyperbolic contour, metallizing the surfaces and assembling. The filter may be quadrupolar and comprise four elongated parts (Fig. 3, not shown), the mating surfaces provided with recesses and engaging projections (Fig. 4, not shown), the cross-section may be circular and the components held by shrunk rings (12), (13), (Fig. 5, not shown).
Patent GB-1420985-A (GB)
Title: Modification of known phenylazo pyridone compound
IPC: C09B29/42
Filed: 1973-05-18
Abstract: 1420985 Azo dye BADISCHE ANILIN- & SODA-FABRIK AG 18 May 1973 [19 May 1972] 23724/73 Heading C4P A new crystal modification of the azo dye of formula is prepared by heating the dye obtained by azo coupling in water, a polar solvent or a mixture thereof. The dye has improved dyeing qualities when used to dye polyester fibres in yellow shades.
Patent GB-532897-A (GB)
Title: Improvements in and relating to insecticidal, fungicidal or other toxic horticultural preparations
IPC: A01N65/12
Filed: 1939-08-17
Abstract: 532,897. Insecticides and fungicides. WINDSOR, J., and DEAN-DAVIES & CO., Ltd., K. Aug. 17, 1939, No. 23768. [Class 81 (i)] An insecticidal and fungicidal preparation in solid form is prepared by treating concentrated fluid extract of pyrethrum with a volatile thinner, e.g. ether or amyl alcohol and incorporating the mixture in a solid crystalline mass, e.g. sugar. Sulphonated lauryl alcohol may be added to the mixture which may be moulded into the form of briquettes or cubes.
Patent GB-812365-A (GB)
Title: Improvements in and relating to the production of artificial filaments, threads and the like
Inventor: RATCLIFFE CHARLES B
IPC: D01F2/10
Filed: 1955-08-18
Abstract: Artificial filaments and like products are produced by extruding into a coagulating bath, containing sulphuric acid and zinc sulphate, viscose containing 0.02 to 0.5 per cent, based on the weight of the viscose, of a compound obtained by condensing ethylene diamine with 4 to 12 mols. of propylene oxide and then further condensing with ethylene oxide in an amount to give a product with 20 to 80 per cent by weight of ethylene oxide units in the molecule and a total of not more than 24 alkylene oxide groups per molecule.  Green or unripened viscose may be used and the products may be subjected to a "hot stretch" process as described in Specification 467,500, [Group IV], in which the freshly spun products are stretched while passing through a bath of hot dilute acid.  Examples are given.  The Provisional Specification describes the spinning of viscose in the presence of 0.02 to 0.5 per cent, based on the weight of the viscose, of a compound obtained by condensing ethylene diamine with 4 to 32 mols. of propylene oxide and then further condensing with ethylene oxide in an amount to give a product with 20 to 80 per cent by weight of ethylene oxide units in the molecule. Specifications 652,741, 652,746, 654,083 and 723,435 also are referred to.
Patent GB-217112-A (GB)
Title: Practice golf balls
IPC: A63B43/00
Filed: 1923-09-24
Abstract: 217,112. Eaton, W. L. Sept. 24, 1923. Balls.-A practice golf ball of standard size consists of a comparatively thin shell of resilient material pierced with numerous apertures which increase air resistance and restrict the flight of the ball without detracting materially from the rotundity of the ball. The ball is made of resilient material such as gutta-percha, rubber, celluloid, wood or treated paper. As shown in Fig. 2, in section, the ball consists of a shell 5, pierced by apertures 7. When made of rubber the ball collapses on being hit by the club. In the form shown in Fig. 4 a central core and radiating spokes 10 are provided within the shell.
Patent GB-434453-A (GB)
Title: Improved thermally controlled switching device applicable to electric apparatus
IPC: H01H37/70
Filed: 1934-08-18
Abstract: 434,453. Automatic circuit-breakers. BRAY & CO., Ltd., G., and BRAY, G., Bagby Works, Leeds. Aug. 18, 1934, No. 23873. [Class 38 (v)] An automatic circuitbreaker comprises a pair of spaced spring contacts 3 adapted to be bridged by a contact 12 passing through an insulating block 11 on an operating member 7 slidably mounted in a bushing 9 and biassed to the right by a spring 15. The switch is held in the circuit closing position by a bimetallic latch 13 mounted on the member 7 and engaging a shoulder on the bushing 9. On overheating the latch 13 bends upwards and the member 7 moves to the right to break the circuit. In a modification, the latch 13 is mounted on the base 2 and engages a depending lug on the slide 7.
Patent GB-169692-A (GB)
Title: Improvements in and relating to filters for purifying air or gases
IPC: B01D46/04
Filed: 1921-09-08
Abstract: 169,692. Beth Maschinenfabrik, W. F. L. April 30, 1920, [Convention date]. Filtering.-In a filter having a throttle valve a for changing the air current during the cleaning of the filter, and a separate device f for closing the inlet of fresh air for the cleaning, the closing device f is displaceably mounted in relation to the rod e controlling the throttle valve and is pressed against the fresh air inlet k by a spring m abutting on the rod. As shown, the rod passes through the closing device which is formed as a cover, and an adjustable stop g on the rod, which passes through the cover, is brought against the cover and opens the inlet when the throttle valve is reversed.
Patent GB-150679-A (GB)
Title: Improvements in or in connection with machinery or apparatus for the manufacture of glass bottles and other blown glassware
IPC: C03B9/20
Filed: 1920-08-17
Abstract: 150,679. Wilzin Automatic Bottle Making Machine Co., (Assignees of Roirant, E.). Sept. 3, 1919, [Convention date]. Blowing; gathering molten metal. - Relates to automatic cam-operated bottleblowing machines and includes apparatus for gathering the molten metal. A gathering-iron 91 descends into the metal in a tank 1 and, on rising again, the metal falling from it is caught by a cup 86 provided with an overflow spout 86a to ensure a constant level of metal in it. The cup 86 is withdrawn from the furnace and raised by a rod 103 below the parison mould 21, which is filled by suction by means of a suction head 53 mounted on a reciprocating tube 55. The cup 86 is lowered and returned to the furnace and a knife 112 cuts the depending metal from the bottom of the parison mould 21. When the parison has set sufficiently, the parison mould 21 and finishing- mould 22, which are mounted on the same carriers 25, are opened and the parison is transferred by moving the ring mould 36 to the right along a slide S by means of a rod 42. The moulds are closed and the blank is blown by a blow-head 54. The parison mould 21, blow mould 22 and ring mould 36 are then opened slightly, and the ring mould 36 is moved to its former position above the parison ready for the formation of the next blank. All three moulds are closed again, the blown bottle remaining in the blow mould 22. When the next parison is transferred to the blow mould 22 a rod 121, connected by links 122 to the ring mould carrier, pushes the last blown bottle down a trough 120. The blow-mould bottom consists of a ring 73, mounted on a reciprocating and rotating shaft 74, and formed with a central hole to receive the pusher 84 which forms the indentation in the bottom of the bottle. The gathering-head 91 may be hollow and provided with suction means to promote gathering. The parts of the apparatus exposed to the heat of the furnace may be water-cooled.
Patent GB-829418-A (GB)
Title: Improvements in or relating to spectacle lenses
IPC: G02C7/02
Filed: 1956-08-03
Abstract: 829,418. Spectacle lenses. LEVER OPTICAL CO. Ltd., and LEVER, J. A. Nov. 4, 1957 [Aug. 3, 1956], No. 23982/56. Drawings to Specification. Class 97(1) A spectacle lens has a peripheral rib, the base of which is shorter than the edge thickness of the lens. The rib is preferably triangular in cross-section.
Patent GB-1241692-A (GB)
Title: Methine dyes and their use in light-sensitive silver halide elements
Inventor: RILLAERS GUY ALFRED
IPC: C09B23/06
Filed: 1968-05-21
Abstract: 1,241,692. Dibutylbarbituric acid. AGFAGEVAERT. 13 May, 1969 [21 May, 1968], No. 24069/68. Heading C2C. [Also in Divisions C4 and G2-G3] N,N<SP>1</SP>-Dibutylbarbituric acid is prepared by reacting equimolar amounts of N,N<SP>1</SP>-dibutylurea and malonic acid in the presence of acetic acid, evaporating the reaction mixture and boiling the residue for 3 hours with 17% aqueous HCl to hydrolyse any 5-carboxyacetyl barbituric acid.
Patent GB-923555-A (GB)
Title: Improvements in or relating to dairy enclosures
IPC: B60P3/04
Filed: 1960-07-11
Abstract: 923,555. Animal carrying vehicles. R. N. LOOK. Oct. 10, 1961 [July 11, 1960], No. 24155/60. Class 108(1). A wheeled enclosure has slatted sides and floors 5 on either side of a central gangway in which an operator stands to milk cows &c., positioned between the sliding doors 8, 9. Ramps are provided to enable the animals to reach the floors 5.
Patent GB-732374-A (GB)
Title: Improvements relating to radiography or radioscopy
IPC: G02B27/02
Filed: 1952-09-26
Abstract: 732,374. Electroscopes. VINGERHOETS, A. W., and MONTE, G. L. A. Sept. 26, 1952 [Sept. 26, 1951], No. 24192/52. Class 37. [Also in Group XL (b)] X-rays from a source 8, Fig. 1, projected through a body 7 are detected by means of an assembly 10 of ionisation chambers each incorporating an electroscope arranged to have a controlling action on light incident on the assembly. Each chamber may be constructed as shown in Fig. 2 with opaque walls 12-16 and a transparent front wall 11. A thin mica plate 17 aluminized on each face is fixed along one edge 18 and forms an electroscope with a conductive layer on the inner face of back wall 12. The chamber is filled with a gas ionizable by X-rays. The electroscope is charged from a source of electrical energy through a resistance whereby the mica plate flexes inwardly due to the attraction between the two plates. When the gas is ionized, the electroscope is discharged and the deflection decreased according to the intensity of the X-rays. Light rays from a source 19 illuminate the upper surface of the mica plate and are accordingly deflected in dependence upon the X-ray intensity. The assembly of chambers may be viewed directly or photographed. After exposure to X-rays, the source of electrical energy may be disconnected so that the mica plates remain stationary, retaining the pattern of the X-ray image. In an alternative construction of chamber, Fig. 3 (not shown), the front and back walls are made transparent, the light source projecting through the back wall on to the mica plate and reflecting out through the front wall. In this construction the direction of the X-rays and electroscope electric field are crossed.
Patent GB-1203348-A (GB)
Title: Armchairs, settees and the like
Inventor: SIMNETT SYLVIA
IPC: A47C7/74
Filed: 1968-05-21
Abstract: 1,203,348. Heated seats. S. SIMNETT. 20 May, 1969 [21 May, 1968], No. 24194/68. Heading A4H. A chair is provided with a heating chamber 4 in which heating elements 5a, 5b and 5c (Fig. 2 not shown) are accommodated and which has ducts 7 covered by grilles 8 through which warm air is directed.
Patent GB-413139-A (GB)
Title: A peeling device for potatoes and the like
IPC: A47J17/02
Filed: 1933-09-01
Abstract: 413,139. Peeling vegetables. LUDOLF, A., 398, Rua Conde de Bomfim, Rio de Janeiro. Sept. 1, 1933, No. 24307. Convention date, July 5. [Class 28 (ii).] A knife for peeling potatoes &c. comprises a blade 2 set in a handle 1 and having a central parer, a sharpened edge 11, and inwardly curved (concave) edges 9 ending in a rounded point 8 for removing eyes &c. The parer is formed by a cutting edge set down relatively to a slot 5 which ends in holes 6. The point of the device is curved upwardly relatively to the general plane of the blade and is provided with a depression 4<a> which acts as a spoon to catch the detached eye.
Patent GB-598846-A (GB)
Title: Improvements in or relating to sealing devices for rotary shafts
IPC: F16J15/36
Filed: 1945-09-20
Abstract: 598,846. Stuffing - box substitutes. BRITISH THERMOSTAT CO., Ltd., and SHERLOCK, J. E. Sept. 20, 1945, No. 24392. [Class 122 (v)] In a shaft seal comprising a ring g of porous metal or material, a ring or annular plate c composed of a non-porous bearing metal in which the ring of porous metal is mounted, and a rubbing ring f carried by the shaft b, a spring e and a flexible metallic bellows d urge the ring of non-porous metal into close engagement with the said rubbing ring so that during operation the porous ring is entirely surrounded by non-porous metal.
Patent GB-816032-A (GB)
Title: Improvements relating to the bonding of non-metallic refractory members to metal members
IPC: C04B37/02
Filed: 1957-08-01
Abstract: A refractory non-metallic member, e.g. quartz, is coated with a thin layer of powdered zirconium hydride or titanium hydride, or a mixture thereof, and a low-melting-point ductile solder and heated in a non-reactive atmosphere to dissociate the hydride and alloy the active metal with the solder; the layer so formed is then placed in contact with a metal member, the metal being one which can form an alpha phase alloy with the solder, and the two members are heated to produce such an alloy at their interface. The solder may be In, Ga, Tl, Zn or Cd, the amount present being limited to that which will form an alpha phase alloy.  The metal member may be Ag, Au or Cu; combinations of Tl with Au or Cu, and Cd with Cu being excluded. Alloys of Ag with In up to 20 per cent, e.g. 1-3 per cent; Cu with In up to 7 per cent, e.g. 3 per cent; Ag with Ga up to 8 per cent, e.g. 7.5 per cent; Cu with Ga up to 15 per cent, e.g. 2.5 per cent; Au with In up to 5 per cent, e.g. 2 per cent; Au with Ga up to 25 per cent, e.g. 5 per cent are referred to.  Specification 626,992 is referred to.
Patent GB-1270025-A (GB)
Title: Device for taking a sample of fluid in a pressurised hydraulic circuit
Inventor: SAINT-ANDRE ROBERT
IPC: G01N1/28
Filed: 1969-05-13
Abstract: 1,270,025. Liquid sampling apparatus. R. SAINT-ANDRE. 13 May, 1969 [13 May, 1968], No. 24432/69. Heading B8N. [Also in Division F2] Apparatus for sampling liquids in hydraulic circuits comprises a body portion 1 having a cavity 2 containing a valve stem 3 having passages 12, 13, 14 and a pointed end 4 closing an aperture 5 connecting the cavity 2 with the circuit. The valve stem has a collar 10 supported on springs 9 mounted in a further collar 6 resting on a support member 7 screwed to the body portion 1. When the support member 7 is unscrewed, the valve stem is lowered until the collar 6 rests on stops 11. The member 7 is then completely removed and the stem 3 is pulled down opening the aperture 5 and allowing liquid sample to pass through the passages 12, 13 into the central passage 14 and be collected at the open end 16. Some liquid leaks between the body portion 1 and valve stem 3 and this is passed out through a leak circuit 15 comprising a needle valve (20), Fig. 2 (not shown), screwed into the passage 15 or a spring-biased valve (22), Fig. 3 (not shown), which allows the liquid to flow out when its pressure is greater than the force exerted by the spring (23). The support member 7 may have a notched extension 26 which may be used to engage projections 28 on the valve stem 3 and pull the stem downwards, and a recess 7a to receive the sample.
Patent GB-737001-A (GB)
Title: Improvements in or relating to reflex velocity modulated electron discharge devices
IPC: H01J25/24
Filed: 1952-09-30
Abstract: 737,001. Velocity-modulated tubes. RAYTHEON MANUFACTURING CO. Sept. 30, 1952 [March 10, 1952], No. 24455/52. Class 39 (1). In a reflex klystron in which the resonant circuit has a single gap traversed by a single electron beam, the cathode emissive surface is irregularly shaped and/or non-uniformly coated with emissive material, or is covered by an auxiliary grid, so as to cause the density of the beam to vary across its cross-section in such a way that hysteresis is reduced. Fig. 2 shows a non-uniform coating, i.e. in discrete areas 3, and Figs. 3A, 3B an irregular shape which may be uniformly coated. The irregularly shaped form is preferred. Hysteresis is defined as the dependance of amplitude and frequency of oscillation upon the direction from which the reflector voltage is approached, this voltage being varied, for example, to accommodate a variation in oscillation frequency. It is stated that due to space charge effect (for non-uniform coatings) or due to the irregular shape of the cathode, which disturbs the equi-potential field lines between the cathode and accelerator, the returning electrons are subjected to different field conditions adjacent the cathode so that when approaching the resonator gap for a third time they arrive spread out instead of bunched. Consequently, they cannot effect any net interchange of energy with the resonator. The accelerating grid is carried by a heat shield surrounding the cathode. The resonator grids are mounted on metal discs sealed through the envelope by means of flanges on the discs and retaining rings. The discs are connected externally to a cavity resonator or other tuned circuit. An irregular coating on the cathode may be produced by scraping areas from a uniform coating, spraying the coating on to the cathode through a stencil, coarse sintering of the cathode on exhaust, or " poisoning " of various areas. Alternatively, a metal grid may be placed adjacent a uniformly coated cathode.
Patent GB-1418972-A (GB)
Title: Laser drilling apparatus
IPC: B23K26/38
Filed: 1973-05-22
Abstract: 1418972 Drilling by lasers PHOTON SOURCES Inc 22 May 1973 [5 June 1972] 24472/73 Heading B3V [Also in Division G2] Laser drilling apparatus is shown as comprising a frame 12 with a fixture 14 on which workpiece 16 can be securely attached. An optical drilling head (see Divisions G2-G3) is positioned above workpiece 16 and is rotatably drivable about axis 19 by means of motor 20, sprockets 22, 24 and chain 26. A movable mirror platform 28 is mounted above head 18 and carries mirrors 30, 32 which direct the laser beam to the head 18. An air input 34 and exhaust 36 are provided on opposite sides of head 18 for cooling and removal of contaminants. The drilling head 18 is such that when it is rotated, the laser beam traces out a circle of variable diameter through the workpiece and cores out a hole. If the motor 20 is stepped and the laser is correspondingly pulsed, series of holes can be drilled around the circumference of a circle. The head 18 is programmable for automatic operation.