baber/WOPTO huggingface dataset:
Patent GB-979653-A (GB)
Title: Improvements relating to automatic tuning arrangements
IPC: H03J7/10
Filed: 1963-07-01
Abstract: 979,653. Automatic frequency control systems. TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT. July 1, 1963 [June 29, 1962], No. 25958/63. Drawings to Specification. Heading H3A. A television receiver self-oscillating mixer is frequency controlled by a capacity diode in the oscillator tuned circuit and the AFC output from a frequency discriminator is non-linearly amplified before applying it to the diode so that the diode's capacity variations are more linearly related to the AFC voltage. To this end the AFC voltage is applied to the grid of a back-biased cathode follower of low anode voltage operating at the bottom part of its anode current/control voltage characteristic to produce a correspondingly much greater output for one polarity of the AFC voltage than for the other, and compensating the converse capacity variations of the diode with voltage.
Patent GB-1198029-A (GB)
Title: Electrical Resistance Element and method of making same
IPC: H01C17/02
Filed: 1968-05-30
Abstract: 1,198,029. Resistance thermometers. ROSEMOUNT ENG. CO. 30 May, 1968 [27 June, 1967], No. 25991/68. Heading H1K. In making a resistor powdered supporting material is compacted around a resistance element mounted in a cavity in a casing by centrifugal action. Typically alumina is plasmasprayed on a tubular mandrel 11 and a coil of coiled platinum wire wound on it and attached by spots of alumina cement. Lead-in wires mounted in platinum-alloy sheathed quartz sleeves 12 lying in recesses in the mandrel are attached to the ends of the coil, whereupon outer sheath 23 is pushed on and brazed to the sheaths and to metal half-rings 21, which seal off one end of the cavity 23. The assembly is then mounted in a centrifuge with a tubular extension of the outer sheath and a conical plug pushed in the hollow mandrel to direct filling material into the cavity. Initially the cavity is filled with water by centrifuging, then a slurry of alumina particles is introduced and enters the cavity, forcing out the water as it does so. Finally, after heating first at 200‹ F. and then at 700‹ F. the cavity is sealed off by brazing in ring-shaped plug 32. An alternative method of locating the coil during centrifuging is to mount it in a helical groove on the mandrel, in which case the similarly grooved outer sheath 22 is screwed on over the coil.
Patent GB-1500877-A (GB)
Title: Extended range variable magnification document reproduction machine
IPC: G03G21/00
Filed: 1976-06-22
Abstract: 1500877 Photo-copier XEROX CORP 22 June 1976 [27 June 1975] 25993/76 Heading G2A A variable magnification line-by-line photocopier, employing a scanning mirror having a scanning rate corresponding to the magnification employed, has a first magnification range (for document material of a size not greater than that permitted by the document platen) wherein the length of scan corresponds to the magnification employed and a second smaller magnification range wherein the length of scan is constantly being limited to the maximum permitted by the document platen. Limitation may be effected by the disengaging action of a clutch Figs. 12-14, (not shown) or a solenoid. The desired magnification may be selected by means of a dial. As shown, the projection system comprises scanning mirrors 21 and 22, which move in the same direction, mirror 21 moving at twice the speed of mirror 22, and also comprises mirrors 23 and 24 and objective lens 28, which are adjusted automatically to correspond to the magnification selected. As objective, a zoom lens may alternatively be employed.
Patent GB-397682-A (GB)
Title: Improvements in moving coil loudspeakers
IPC: H04R9/04
Filed: 1932-09-19
Abstract: 397,682. Loud-speahers. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and OLIVER, D. A., c/o General Electric Co., Ltd., Wembley, Middlesex. Sept. 19, 1932, No. 26001. [Class 40 (iv).] In a moving coil loud-speaker in which the paper &c. cone 1 and centring member 4 are moulded as a single whole, the member 4 has a diameter substantially greater than that of the moving coil 12 and is connected to the cone by a corrugation 8, the support 11 for the moving coil being connected to the cone outside this corrugation. The cone, in addition to being formed with a corrugation 2 at its outer end where it is attached to the baffle 3, is also provided with corrugations 13 which serve to improve the frequency response, the abutment 10 serving accurately to locate the coil support 11. If desired, the support 11 may be formed integrally with the cone and its centring member. Specification 334,641, [Class 40 (iv), Telephones &c], is referred to.
Patent GB-1404687-A (GB)
Title: Benzoin ethers
IPC: G03F7/031
Filed: 1973-05-31
Abstract: 1404687 Polyesters; photosensitizer EASTMAN KODAK CO 31 May 1973 [5 June 1972] 26032/73 Headings C3P and C3R [Also in Division C2] A polyester comprises the polyesterification product of a glycol and a benzoin ether of the formula wherein R and R<SP>1</SP> are straight or branched chain C 1  to C 10  alkyl groups. An example is given in which a polyester is prepared from ethylene glycol and 4,4<SP>1</SP>-bis(ethoxycarbonyl)- benzoin ethyl ether. The polyesters are useful as photoinitiators for polymerizable unsaturated monomers. A coating composition comprises a polymerizable unsaturated compound and, as a photosensitizer therefor, a benzoin ether of the above formula. Specified polymerisable compounds are acrylic, α-alkyl acrylic, and α-chloroacrylic acid compounds such as esters, amides and nitriles; vinyl and vinylidene esters, ethers and ketones; styrene, compounds having more than one terminal unsaturation, and unsaturated polyesters such as those derived from unsaturated acids and glycols. The composition may be applied to a substrate and cured by irradiation with actinic light. An example is given in which compounds of the above formula are added to a styrenated unsaturated polyester containing neopentyl glycol ester with isophthalic acid-maleic anhydride in a 1 : 1 molar ratio and 35% styrene monomer, the resulting compositions are coated on to steel panels and are exposed to a mercury arc.
Patent GB-1141299-A (GB)
Title: Process for or relating to the production of hydrogen peroxide
Inventor: LEAVER JOHN PHILIP
IPC: C01B15/013
Filed: 1965-06-21
Abstract: 1,141,299. Hydrogen peroxide purification. LAPORTE CHEMICALS Ltd. 10 June, 1966 [21 June, 1965], No. 26112/65. Heading C1A. Hydrogen peroxide may be purified from major contaminants, which are present in ionic form, by contacting the contaminated solution with an ion exchange resin which will selectively absorb hydrogen peroxide. The resin may be of either the anionic or cationic type but is preferably anionic, and must be in a form which will not exchange with the contaminant, (e.g. if the contaminant is disodium pyrophosphate, the resin must be in a sodium ion form if cationic, and in a pyrophosphate ion form if anionic). Suitable resins are sulphonated polystyrene or polymethacrylate based, and cross-linked with 2 to 20% of divinyl benzene. The hydrogen peroxide is washed off the resin bed with water. The process may be operated continuously by passing the crude hydrogen peroxide solution and water alternately through the resin bed. To obtain a very pure product the fractions containing hydrogen peroxide from the first purification may be concentrated and then recycled.
Patent GB-1115162-A (GB)
Title: Improved service indicator
IPC: G04C3/18
Filed: 1965-06-21
Abstract: 1,115,162. Indicating devices on vehicles. U.S. SERVICATOR CORPORATION. 21 June, 1965 [10 July, 1964], No. 26126/65. Heading B7H. [Also in Division F1] A device which indicates the need for servicing the engine of a vehicle is included in its ignition circuit, a card containing servicing information being ejected from a stack in a container at intervals dependent upon the time the ignition circuit is switched on. The stack of cards 120, Fig. 7A, is urged upwardly in its container by a wire device 141 and spring 143 towards an ejector member 47. An L-shaped bimetallic member 49, Fig. 12, is adjustably secured by one of its arms 49b, the other arm, which passes through a heater coil 52 in parallel with the ignition coil of the engine, being in engagement with a pawl member 76, 73 which engages a ratchet-wheel 77 and also actuates a snap-action switch 65, 66 included in the circuit of the coil 52. When the ignition is switched on, the coil 52- heats the bimetallic member 49 causing its free end 49a to move to the left whereby the pawl member 76, 73 rotates the wheel 77 and the switch 65, 66 is broken, causing the coil to cool and the free end 49a to move again to the right to close the switch 65, 66 again. At intervals, one tooth of the ratchet-wheel 77 is deeper than the rest which allows the actuating edge of the pawl member 76, 73 to engage a smaller ratchet wheel 85. The wheel 77 rotates independently of the wheel 85 which is connected for rotation with an indicator member visible from one end of the container and with a cam 89 which engages a follower member 111 upon the ejector member 47 pushing it to the right against the pressure of a spring 113 until the end 115 engages a card, and the follower reaches the part 110a of the cam when the ejector 47 is urged sharply to the left, ejecting the card to a position whereby it is visible and may be removed. A stop-member 131 prevents re-entry of the card into the stack. Slide devices are included on the ratchet-wheel 77 to selectively blank off the deeper teeth, so that the wheel 85 may be moved according to any predetermined requirements. An additional bimetallic element 55 is included and operates when excessive heat is developed within the device to open a safety switch 58 in the circuit of coil 52. The free end 49a of the bimetallic element 49 is less to the right when working than when the device is cold, so allowing member 150, 151 to be urged to a visible position to indicate that the device is working.
Patent GB-441891-A (GB)
Title: Improvements in the manufacture of electric incandescent lamps
IPC: H01K3/10
Filed: 1934-09-12
Abstract: 441,891. Supports for electric incandescent lamp filaments. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, and CHELIOTI, G., Osram - G.E.C. Lamp Works, Brook Green, Hammersmith, both in London. Sept. 12, 1934, No. 26199. [Class 39 (ii)] In the manufacture of a stem for supporting the elongated filament of a tubular electric incandescent lamp the filament supporting wires 3 are inserted at intervals into a glass rod 1 which is softened by the flame from a needle burner 2 and also heated by localized flames 7 directed from a burner 6 on to the opposite side of the stem into which no support wires are sealed. The rod 1 is moved intermittently longitudinally from left to right and receives the jet of flame from the burner 2 during its stationary periods, a filamentsupporting wire 3 being inserted automatically by a member 4 when the glass has softened sufficiently, and at the same time the needle flame is interrupted by a heat resistant deflector 5 which is also advanced by the machine.
Patent GB-1108254-A (GB)
Title: Improvements in regulating devices for driving automotive vehicles equipped wita infinitely variable-speed drive
IPC: F16H61/662
Filed: 1965-06-21
Abstract: 1,108,254. Variable-ratio control. SOC. ANON. ANDRE CITROEN. 21 June, 1965 [29 June, 1964], No. 26204/65. Addition to 885, 289. Heading F2D. In the vehicle change-speed control of the parent Specification 885,289, a shift-arm 2 controlling the ratio of a steplessly-variable gear V is controlled by an engine-driven centrifugal governor R, loaded through a cam 7 by the engine accelerator pedal 5, to actuate a valve D supplying pressure liquid from a pump P to one or other side C 1 , C 2  of a cylinder controlling the shift arm 2. In this Specification, acceleration and downshift engine - braking characteristics are improved by the provision in the feed line of that side, C 2 , of the cylinder which moves the shift-arm 2 in the leftward direction for upshift towards the lowest reduction ratio, of an additional exhaust branch 38 controlled by an exhaust-valve T, actuated by an engine-driven centrifugal governor 40, loaded by a spring 41, the loading of which latter is such that it cannot be compressed by the masses 40 below a predetermined minimum engine speed, whilst a considerably higher engine speed is necessary to compress it fully. Thus, below that minimum engine speed the exhaust valve T remains open, so that, on accelerator depression, the highest reductionratio is maintained for maximum acceleration until engine speed exceeds the said minimum, whereupon the valve T begins to close and graduated upshift by the main control is permitted. Similarly when, on accelerator-release, engine speed falls below the said minimum, the exhaust valve T again opens, causing downshift to the highest reduction ratio for engine-braking.
Patent GB-1094658-A (GB)
Title: Improvements in and relating to filters
IPC: F02M35/024
Filed: 1964-06-24
Abstract: 1,094,658. Gas filter. M. DAVIS. June 24, 1965 [June 24, 1964], No. 26219/64. Heading B1T. A gas filter (Figs. 1-4, not shown) comprises a corrugated peripheral wall 10 secured to a pair of annular discs 11, both the wall 10 and the discs 11 being made of porous foamed plastics. In the embodiment shown, gas flow is radially inwards, and the element is internally supported by a cylindrical support 12 and a plurality of U-shaped sections 15 which seat inside the corrugations. Alternatively, gas flow may be outwards in which case the support is on the outside of the filter element, or support may be supplied both inside and outside. In use, end members 11 are compressed between in-turned or out-turned lips 13 of support 12, an end closure plate 19 and an annular end plate 21. As shown in Fig. 5, which illustrates an air filter for use on a carburettor intake, two or more elements may be arranged end to end in a common housing. Perforate sleeve 20 and support 12 may be moulded plastic, support 12 may be formed in sections, while corrugation supporting sections 15. (Fig. 4, not shown) may be of wire or moulded plastics.
Patent GB-1134119-A (GB)
Title: Device for conversion of a variable angular magnitude into electrical impulses variable intervals of time apart
IPC: G01S3/789
Filed: 1966-06-13
Abstract: 1,134,119. Photo-electric direction finders. BOLKOW G.m.b.H. 13 June, 1966 [12 June, 1965], No. 26282/66. Heading H4D. In a photo-electric direction finder of the kind wherein relative movement of the image of a light-emitting object (e.g. the sun) and a slit in front of a photo-cell converts angular deviation of the object from the optical axis of the direction finder into electric impulses having correspondingly variable time separation, the direction finder has a lens, oscillated transversely relative to the optical axis, ahead of a stationary slit. In one embodiment lenses 14, 15, Fig. 4, are oscillated in phase opposition by a tuning fork 16, the slotted diaphragms 22, 23 and corresponding photo-cells 17, 18 yielding greater sensitivity than in the singleslit embodiment, Figs. 1, 2, 3 (none shown). In a further embodiment a single oscillating lens 34, Fig. 7, is utilized in conjunction with mirrors 36, 37 and slotted diaphragms 39, 40 to afford direction about two orthogonal axes.
Patent GB-949743-A (GB)
Title: Nuclear reactor
IPC: G21C13/02
Filed: 1962-07-09
Abstract: An organic coolant for a nuclear reactor comprises a mixture of about 10% by weight ortho-terphenyl, 60% meta-terphenyl, and 30% para-terphenyl.  The coolant will normally contain about 30% of the decomposition products due to irradiation.
Patent GB-787043-A (GB)
Title: Method for production of silicon
IPC: C01B33/02
Filed: 1955-09-14
Abstract: Silicon together with hydrogen iodide is produced by interacting silicon tetraiodide vapour and hydrogen at a temperature of preferably 900-1000 DEG  C., more preferably 900-950 DEG  C. Hydrogen, purified by passing through finely divided copper at elevated temperature in order to remove oxygen and through calcium chloride to remove moisture, may be passed continuously over molten silicon tetraiodide and the resulting gaseous mixture of hydrogen and silicon tetraiodide passed into a reaction chamber of graphite or quartz surrounded by an induction heating coil. Silicon collects in the chamber and is periodically removed. Hydrogen iodide may be frozen out from the residual gases by passing through a cold trap containing liquid nitrogen.  In a cyclic process, iodine may be passed over silicon of 97 per cent purity at a temperature of 750 DEG C., and the resulting silicon tetraiodide passed into a chamber containing pure graphite plates, which may be removed and replaced without stopping the process, for the deposition of the silicon.  The hydrogen iodide produced is collected, converted into iodine in known manner and recycled to the process.
Patent GB-678017-A (GB)
Title: Improvements in weight operating devices for weighing instruments
IPC: G01G1/26
Filed: 1949-10-14
Abstract: 678,017. Weighing-apparatus. OERTLING, Ltd., L., HODSMAN, G. F., and BROOKE, E. R. Oct. 13, 1950 [Oct. 14, 1949], No. 26378/49. Class 143 A remotely-controlled weight-changing device for a chemical balance comprises a pair of plates 8, 9 suspended from the beam 3 by a stirrup 5, and a plurality of conical weights 14 which are either supported on frustro-conical bosses 12 in the plates, as shown at the top of Fig. 2, or engaged, by pins 15, with resiliently lined holes 18 in a fined housing 19, as shown at the bottom of Fig. 2. These pins are integral with levers 16 which are secured by cams 17 secured to shafts 21 rotatable by means external to the casing, weight indicators (not shown) being operated' by rotation of these shafts. The plates 8, 9 are supported on the stirrup by a bell crank 7 which is angularly adjustable by a screw 11. An adjusting slug 22 is provided to locate the centre-of-gravity of the plate assembly directly beneath the knife edge 4, and to maintain this balance during operation, the weights are loaded and unloaded in symmetrical pairs.
Patent GB-633198-A (GB)
Title: Improved apparatus for supplying water to poultry cages and the like
IPC: A01K39/02
Filed: 1947-10-01
Abstract: 633,198. Drinking bowls for poultry cages. KNIPE, A. C. Oct. 1, 1947, No. 26464. [Class 5(ii)] In a drinking bowl particularly for battery cages, wherein each bowl A has a supply of clean water, the supply is turned off when the bowl is rotated in a horizontal plane about its support. As shown, a water supply pipe D terminates in a conical union B which supports an extension piece A1 of the bowl A, having a bore A2, A3 which connects with a bore B3 in the union. The water is cut off when the bowl is moved through 90 degrees, thus allowing the cage door H to be opened. If the bowl is inadvertently placed in front of an adjacent cage the water will flow through duct A3.
Patent GB-1013498-A (GB)
Title: Improvements in or relating to polymerization method and compositions produced thereby
IPC: C08F36/04
Filed: 1962-07-10
Abstract: High impact strength polymers are produced in bead form without substantial formation of emulsion polymer by (1) bulk polymerizing a mixture of 20 to 100% of a monovinyl aromatic monomer and up to 80% of an ethylenic comonomer in the presence of a rubbery polymer of a C4-C6 diolefin to a conversion of 15 to 40% of monomer, and (2) containing polymerization to a conversion of at least 70% in suspension in an aqueous medium which contains an anionic surfactant, a polyvinyl alcohol suspending agent and an electrolyte, e.g. sodium, potassium or calcium chloride, or sodium nitrate.  Rubbers specified are copolymers of butadiene and isoprene with styrene and acrylonitrile, polychloroprene and high cis-1,4-polybutadiene. Vinyl aromatic monomers specified are styrene and alkyl, aryl and halo derivatives thereof.  Comonomers specified are unsaturated acids, esters, amides, nitriles, ethers, ketones and halogenated hydrocarbons.  Preferred anionic surfactants are sodium stearate and sodium dodecylbenzene sulphonate.  Polymerization is carried out in the presence of peroxide catalysts, preferred being di-tert.-butyl peroxide, tert.-butyl peracetate, tert.-butyl perbenzoate, and mixtures thereof.  The examples describe polymerizing styrene and mixtures thereof with acrylonitrile and methyl methacrylate in the presence of a butadienestyrene copolymer, and polymerizing styrene in the presence of a polybutadiene having a cis-1,4 content of 95%.
Patent GB-1043906-A (GB)
Title: Label dispenser
IPC: B29C63/00
Filed: 1964-06-26
Abstract: 1,043,906. Dispensing labels from a roll. KIMBALL SYSTEMS Ltd. June 26, 1964 [Aug. 7, 1963], No. 26591/64. Heading A4G. A dispenser of strip from which adhesive labels are detached is formed from a moulding or bending from blank sheet and has a support 11 for a roll 1 from which the strip 2 is guided under a first raised tine 23, along a panel 10 where the labels may be marked, under a raised tine 20, over a tine 21 raised above tine 20 and at the corners of which the labels are peeled off the strip, and finally under a lower tine 22 where the strip is pulled along manually and on top of which a label finally rests.
Patent GB-384012-A (GB)
Title: Improvements in or relating to exhaust silencers for internal combustion engines
IPC: F01N1/08
Filed: 1931-09-23
Abstract: 384,012. Exhaust-silencers. WILL, G., 58, Freigerichtstrasse, Hanau-on-Main, Germany. Sept. 23, 1931, No. 26594. [Class 7 (ii).] The silencer is of the type in which an inner tube c is surrounded by a shell a so as to leave an annular chamber d divided by annular discs f into compartments which do not communicate with one another, but are in communication with the tube c through openings b in its wall. To ensure a uniform distribution of the gases entering at o into the compartments the tube c, according to the invention, is provided with obstructing means. These may comprise perforated or annular baffle discs g, Fig. 1, or, in a modification, a cigar-shaped core extending the whole length of the tube. In a further modification, Fig. 3, the tube decreases in diameter towards the outlet end, and in a still further modification such a tapering tube is provided with baffles. The inner tube is retained in position by a spring m bearing against a disc f and a cap k.
Patent GB-278747-A (GB)
Title: Process of producing zinc salts
IPC: C01G9/06
Filed: 1927-10-07
Abstract: 278,747. Metallbank und Metallurgische Ges. Akt.-Ges. Oct. 7, 1926, [Convention date]. Sodium sulphate and bisulphates. - Zinc sulphate is produced from a liquor containing zinc and sodium sulphates by concentration until the contents of sodium sulphate are, for example, not more than half a gram molecule per kilogm of liquor so that on cooling to 10-20‹ C., zinc sulphate crystallizes free from sodium. Sulphuric acid slightly in excess of that necessary to transform the sodium sulphate to bisulphate may be added, whereon after cooling, zinc sulphate separates as a monohydrate. The process is applied to the liquor obtained by lixiviating chloridizing-roasted burnt sulphide ores after removal of copper and of iron and cobalt. The bulk of the sodium sulphate is frozen out at about 5‹ C. and the liquor is used for lixiviation of fresh burnt ore.
Patent GB-167975-A (GB)
Title: Improvements in flanging metals
IPC: B21D19/08
Filed: 1920-09-17
Abstract: 167,975. Rogers, T. W., (Krupp Akt.-Ges., F.). Sept. 17, 1920. Flanging.-In stamping flanged holes in plates, for example for connecting flue tubes to steam generator ends, the dies G, H have a tapered clearance corresponding to the reduction in thickness occurring in the flange a<2> which is produced to cylindrical form either externally or internally. The die G may be cut at g<2> so as to beresilient and the cut may be reinforced by springs (not shown).