baber/WOPTO huggingface dataset:
Patent GB-515266-A (GB)
Title: Improvements in and relating to electric battery charging systems
IPC: H02J7/12
Filed: 1938-05-27
Abstract: 515,266. Charging batteries. BRITISH THOMSON - HOUSTON CO., Ltd., and LUDBROOK, L. C. May 27, 1938, No. 15891 [Class 38 (iv)] In electric battery charging systems, more particularly for charging and keeping fully charged the batteries for emergency lighting systems, a rectifier is provided to supply the battery and a load in parallel, the output of the rectifier being controlled by the battery current to maintain the said charging current at a small positive value independently of any changes in the supply voltage and the load current. As shown in Fig. 1, grid-controlled rectifier tubes 2, 3 are fed from a mains transformer 1, a lagging A.C. bias being applied to their grids from a transformer 4. Control of the grids is obtained by varying the D.C. component of the grid bias in known manner. The rectifier supplies a load 6 and battery 16, there being a low resistance 7 in the battery circuit. The D.C. coil of a saturable reactor 8 is connected across the resistance 7, and resistors 10, 11 are connected across windings on the two outer limbs, so that the voltage developed across these resistors is a fraction of the current through 7. An auxiliary D.C. bias is supplied across a potentiometer 12, and the conditions are such that a change in battery current due to any external cause automatically regulates the grid bias of the rectifier and controls the output of the latter so that the charging current is maintained within certain limits. In a modification a rectifier tube supplying saturating current to a reactor in the primary circuit of transformer 1 is controlled similarly to the rectifiers 2, 3. To supply a full charge when required the sensitivity of the control is reduced by inserting an impedance 17 in series with the saturating winding of the reactor 8.
Patent GB-422761-A (GB)
Title: Improvements in and relating to the control of internal combustion engines
IPC: F02B43/10
Filed: 1934-05-28
Abstract: 422,761. Actuating-materials. ERREN, R. A., 299, Seven Sisters Road, Finsbury Park, London. May 28, 1934, No. 15896. [Class 7 (ii)] In an engine using hydrogen or oxyhydrogen together with air, the output is controlled by keeping the admission of air constant and varying the amount of hydrogen or oxyhydrogen. If hydrogen is employed, the constant amount of air is such that the amount of oxygen therein is half the amount of hydrogen admitted for the maximum output; if oxyhydrogen is employed in which the ratio of oxygen to hydrogen is less than 1 : 2, the amount of oxygen in the oxyhydrogen mixture plus that of the oxygen contained in the constant amount of air is half the amount of hydrogen admitted for the maximum output. When a hydrocarbon fuel is used in addition, the quantity of hydrocarbon fuel is also varied to vary the output of the engine.
Patent GB-1058707-A (GB)
Title: Improvements relating to piezoelectric resonators
IPC: H03H9/00
Filed: 1964-04-16
Abstract: 1,058,707. Piezo-electric elements. CLEVITE CORPORATION. April 16, 1964 [April 30, 1963], No. 15910/64. Heading HIE. A Piezo-electric resonator operating in a flexural mode comprises a flat circular ceramic ring having a radial slot and one or more pairs of electrodes on opposite flat surfaces of the ring. The electrode pairs may be circumferential, or in radial segments; the ring may be polarized uniformly in a thickness direction, or, if only one pair of electrodes are employed. the ring is polarized in a thickness direction, poled one way in an inner, the other way in an outer, radial segment. The crystal may have the composition Pb 0 . 95 Sn 0 . 05  (Zn 0 . 45-0 . 53 Ti 0 . 55 - 0 . 47 ) O 3 +0À7<SP>w</SP>/0 Ca 2 O 3 . The crystal may be suspended by the leads (20, 22, Fig. 1) secured to pins (26) which are held in an insulating base (24) and top plate (30), surrounded by cushioning materials (32, 34) and removable case (35).
Patent GB-1489135-A (GB)
Title: Colour video signal processing system
IPC: H04N9/45
Filed: 1975-04-17
Abstract: 1489135 Video signal processing systems SONY CORP 17 April 1975 [23 April 1974] 15959/75 Heading H4F The system includes a variable frequency oscillator in a phase lock loop containing a phase comparator fed by a reference signal and a chrominance sub-carrier. The v.f.o. output is used to provide a signal to a frequency converter which receives a chrominance signal, e.g. from a magnetic tape recorder, and converts it to the sub-carrier frequency. To prevent or reduce hue errors at the start of a field the gain of the phase lock loop is greater during the vertical blanking period than during the trace period. In one embodiment, Fig. 5, which can process both PAL and NTSC signals, video signals from a magnetic tape 1 are separated into luminance and chrominance components by filters 4, 11. The luminance component passes via limiter 5 and frequency or phase demodulator 6 to adder 7. The chrominance component, which was recorded on a frequency lower than that of the luminance component, passes to frequency converter 12 where it is returned to the normal chrominance sub-carrier frequency prior to being passed to adder 7. The normal composite video signal appears at the output of the adder. The converter 12 forms part of a phase lock loop including burst gate 24, phase comparator 25, v.f.o. 23 and a frequency converter 22. An oscillator 21 feeds converter 22 and also feeds the comparator either directly or via an attenuator 32 via switch 31. When a vertical sync. signal is detected (33) in the composite video signal the switch is set to pass the signal from oscillator 21 direct to comparator 25 so that the loop gain is high and consequently the error voltage, if any, reaches its full value before the end of the vertical blanking period. At the end of this period the switch reverts to the position shown if the video signal is PAL, so that loop gain is relatively low during the trace period, preventing chrominance frequency mislock. If the video signal is NTSC, as detected by unit 35, the switch 31 is held so that the attenuator is never in circuit. A variable attenuator may replace attenuator 32 and switch 31, Fig. 3 (not shown), or the attenuator may be omitted and the loop gain adjusted by direct control of the v.f.o., Fig. 4 (not shown).
Patent GB-222444-A (GB)
Title: Improvements in or relating to toothed gearing
IPC: F16H1/22
Filed: 1924-07-03
Abstract: 222,444. Jensen, R. Sept. 29, 1923, [Convention date]. Toothed gearing.-In double-helical double reduction and other toothed gearing of the kind in which a driving-wheel 1 drives two or more wheels 2, 3, each wheel is connected to its shaft 5 by a torsion shaft or spring 9, which passes through the shaft 5 and is at one end 7 secured to the wheel and at the other end rigidly or slidably secured to the shaft end. The wheel is keyed so as to slide on the shaft 5 with rotary lost motion so that it can adjust itself axially and rotatably to the driving-stress, strain of the torsion shaft or spring being limited. The spring end 7 may slide axially on pins secured in the wheel body 4, or may be secured to the wheel rim 2, which has limited rotary freedom on the body 4. The shaft slides freely in its bearings 8 to permit correct engagement of the low-speed wheels 12, 14, and one bearing may be arranged between the wheels 2, 12 so that the wheel 2 is overhung.
Patent GB-985381-A (GB)
Title: Phototube
IPC: G01J1/42
Filed: 1962-04-26
Abstract: 985, 381. Photo-electric devices. RADIO CORPORATION OF AMERICA. April 26, 1962 [May 10, 1961], No. 16051/62. Drawings to Specification. Heading G1A. [Also in Divisions H1 and H4] A photo-cell let into the end of a light conducting rod is used in an automatic contrast or brightness control system for a television receiver. In an embodiment one end of a "Lucite" rod, moulded with venetian blind-like ridges to widen the acceptance angle, receives ambient light at a position near the CRT face and pipes it to a photoconductive cell embedded in silicone resin partially filling a cavity at the other end of the rod. The cell consists of an alumina substrate bearing a sprayed and sintered layer of cadmium sulphide or selenide upon which are evaporated interdigitated tin electrodes. The cell leads project through an epoxy resin layer sealing the cavity, and plug directly into a chassis adjacent the tube base and containing the circuitry for the system. To assist in locating the socket when plugging in the cell/light guide assembly from the front of the receiver, an indexing portion is provided at the light gathering end of the "Lucite" rod. This rod may be made megaphone shaped to gather more light, or can be made in curved or cranked form for particular applications.
Patent GB-1483327-A (GB)
Title: Extraction of sugar from molasses
IPC: C13B35/06
Filed: 1976-04-21
Abstract: 1483327 Extraction of sugar from molasses BAYER AG and SUDDEUTSCHE ZUCKER-AG 21 April 1976 [24 April 1975] 16108/76 Heading C6B  Molasses is separated into sugars and non-sugar constituents by ion exclusion or liquid distribution chromatography on acid cation exchangers based on cross-linked copolymers of monovinyl compounds and divinyl compounds, in which the cation exchangers used are two different resin types A and B, whereof resin type A is a macroporous, acid cation exchanger which contains 8 to 20 wt. per cent of polyvinyl compounds and has an inner surface area of 5 to 150 m2/g of solids, whilst resin type B is an acid cation exchanger in the form of a gel, which contains from 2 to 6 wt. per cent of polyvinyl compounds and in which these resin types are so arranged in a separating column, or in several separating columns arranged in series, that the molasses to be separated first flow through resin type A, and that resin type A accounts for 5 to 35% by volume of the total resin through which the molasses flow. Resin type A may contain 30 to 50 wt. per cent of swelling water and resin type B may contain 55 to 65 wt. per cent of swelling water. The cation exchangers of types A and B may be present in the salt e.g. potassium, sodium, calcium, iron or aluminium form. Preferably the total volume of the bed of the cation exchangers is divided amongst two or more columns arranged in series. Resin types A and B are preferably strongly acid cation exchangers. The separation may be carried out at from 50 to 99‹C.
Patent GB-713232-A (GB)
Title: Improvements in and relating to the production of lacquer resins
IPC: C09F1/04
Filed: 1952-06-26
Abstract: Lacquer resins of high melting point are obtained by melting one or more natural resins, such as copal, colophony or amber, or mixtures thereof, together with one or more polymers and/or copolymers of acrylic and/or methacrylic acid and/or carboxy derivatives thereof, this melting together resulting in chemical reaction between the natural and synthetic resin, the resulting product being subsequently esterified with a polyhydric alcohol, such as diethylene glycol, glycerine, 1:2:4-butanetriol and pentaerythritol.  Carboxy derivatives of acrylic and methacrylic acids specified are their esters, amides, and nitriles, for example methyl acrylate, ethyl acrylate, and butyl methacrylate. The acrylic and methacrylic acids and derivatives may be used in the form of their homopolymers or as copolymers with each other or other polymerisable monomers such as styrene, vinyl esters, or vinyl ethers.  Pre-treated natural resins such as polymerised colophony or colophony treated with formaldehyde may be used alone or together with untreated natural resins.  Also present in the reaction mixture may be drying oils.
Patent GB-533285-A (GB)
Title: A process for producing liquid saturated benzine hydrocarbons with high octane numbers
IPC: C07C2/60
Filed: 1939-06-01
Abstract: 533,285. Production of liquid saturated benzine hydrocarbons. FIFE. J. G. (Naamlooze Vennootschap De Bataafsche Petroleum Maatschappij). June 1, 1939, No. 16184. Drawings to Specification. [Class 2 (iii)] [Also in Group III] Liquid saturated benzine hydrocarbons are made by the interaction of low molecular weight paraffin hydrocarbons and low molecular weight alkenes in the presence of a small proportion of an aluminium halide and an aluminium chloride slop oil. Paraffins mentioned include the lower isoparaffins such as isobutane. Mixtures may also be used such as cracking fractions. The low molecular weight alkenes may be derived from compounds of high molecular weight such as polymerization products by decomposition during the reaction, which preferably takes place in the liquid phase and in some cases in the presence of inert gases such as hydrogen, nitrogen and carbon dioxide. Temperatures up to about 100 ‹C. may be used, suitably with a contact time of the order of 10 minutes. It is stated that the aluminium chloride slop oil in the presence of a small amount of aluminium chloride and particularly with the addition of an activating substance such as hydrochloric acid, propyl chloride or tertiary butyl chloride has the effect of a large amount of aluminium chloride. The aluminium halides may be used alone or with a carrier substance such as kaolin, silica gel and active carbon. They may also be employed in the form of Gustavson compounds, that is, complex compounds of the aluminium halide with aromatic hydrocarbons, particularly those containing alkyl radicals. Specification 473,935, [Group III], is referred to.
Patent GB-581293-A (GB)
Title: Improvements in motor vehicle and like radiators
IPC: F28D1/03
Filed: 1944-08-28
Abstract: 581,293. Tubular heat-exchange elements. BOWMAN (BIRMINGHAM), Ltd., E. J., and BOWMAN, E. J. Aug. 28, 1944, No. 16235. [Class 64 (iii)] A radiator having upper and lower tanks connected by stream-lined metal tubes 12 passing through a plurality of gill plates 10, has the tubes at the side of the assembly strengthened at top and bottom by liners 13, which may be separate or made integral with the tubes, as by folding over the ends of the metal blanks from which the tubes are formed. Specifications 471,553 and 561,026 are referred to.
Patent GB-761607-A (GB)
Title: Improvements in or relating to rotary perforating, creasing, and slitting machines
Inventor: HILL JAMES
IPC: B26F1/20
Filed: 1954-06-02
Abstract: 761,607. Slitting &c. machines. ROLLEM PATENT PRODUCTS, Ltd. June 2, 1955 [June 2, 1954], No. 16261/54. Class 31 (1). [Also in Group XVI] A rotary perforating, creasing or slitting machine of the type in which sheets of paper are fed individually between a pair of rolls, one with spaced cutting or creasing discs and the other with pairs of plain discs for each cutting or creasing disc, and resilient rings on one roll to nip the sheets against the other roll, is provided with two oppositely facing deflectors bearing transversely on the sheet to be fed and disposed one before the other in advance of the roll nip, the deflector nearer the nip projecting beyond the plane extending from the operative edge of the other deflector to the nip. As shown in Fig. 2, a sheet 7 is deflected by a metal straight-edge 10 fitted to the upper surface of a board 11 positioned slightly above the horizontal plane through the nip formed by rolls 3 and 4 and then by a bar 12 having a bevelled surface 13. The downward deflection of the sheet 7 from the board 11 and then the reverse deflection caused by the surface 13 counteract the tendency for the sheet to buckle. The rolls 3, 4 carry ring cutters 5, 6, the faces of which overlap to slit the sheet 7. Creasing rolls 15, 16, mounted on shafts 1, 2 carrying the cutters 5, 6, have creasing ribs 17 and grooves 18. Perforating rolls 19, 20 having a perforating disc 21 engaging discs 22 are mounted on the shafts 1, 2. The rolls 3, 15, 19 each have one or more rubber rings 9 engaging plain cylindrical surfaces on the cooperating rolls 4, 16 and 20 for frictionally feeding the sheets. A stripper on the roll 19 frees the sheet 7 from the disc 21 after perforation and a clearer between the discs 22 removes punchings from the disc 21. In a modification, Fig. 4 (not shown), the second deflector is in the form of a roller.
Patent GB-1415081-A (GB)
Title: Printing inks for sublimation transfer printing
IPC: C09D11/02
Filed: 1973-04-05
Abstract: 1415081 Dispersed dye-stuff compositions CIBA-GEIGY AG 5 April 1973 [17 April 1972 8 March 1973] 16323/73 Headings C3F C3P and C3R [Also in Division C4] A printing ink composition comprises: (a) a dyestuff which sublimes (as defined) at 160 to 220 C.; (b) one or more synthetic resins; (c) at least one organic solvent of molecular weight up to 200 in which the dye has a maximum solubility of 0À2% by weight and the resin or resins a minimum solubility of 5%. The dye-stuff is dispersed in the ink, no water soluble dispersants being used. The viscosity of the ink is no more than 30 seconds (as herein defined). Preferred organic solvents are methanol/ isopropanol mixture with or without petroleum spirit, isopropanol and white spirit or petroleum spirit, isopropanol/ethanol and isopropanol itself. Dyestuffs exemplified are of the general types, anthracene, azo, anthraquinone and phthaloquinone. Synthetic resins specified are ethyl cellulose, polyvinyl pyrrolidone, cellulose acetopropionate, cellulose acetobutyrate, a pentaerythritol resin, a ketonic resin derived from formaldehyde and cyclohexenone, alkylphenol resin, colophonium maleinate, an acrylic acid-modified colophonium resin, a non-drying alkyd, polyvinyl acetal, a phenol resin modified with colophonium, a diphenol terpene resin and calcium resinate.
Patent GB-724187-A (GB)
Title: Improvements in and relating to polymerizable compositions
IPC: C08F283/01
Filed: 1951-07-10
Abstract: Solid polymeric materials are prepared by forming a mixture of (a) an oxygenated ester derived from methacrylic acid and a glycol, containing at least two methacrylate groups and having one or more ether linkages in the glycol portion, prepared by the process disclosed in Specification 724,188; and (b) one or more polymerizable organic monomers containing unsaturated bonds, and subjecting the mixture to polymerizing conditions.  Polymerizable monomers specified are butadiene, isoprene, 2,3-dimethylbutadiene, piperylene, hexadiene-1,5, cyclopentadiene, chloroprene, 2-cyano-butadiene-1,3, vinyl acetate, propionate, and butyrate, diallyl and dimethallyl phthalates, diallyl succinate, allyl diglycol carbonate, triallyl citrate, vinyl methyl ketone, vinyl methyl, vinyl ethyl, and divinyl ethers, ethylene, styrene, methyl styrene, p-chlorostyrene, di- and tri-chlorostyrenes, divinyl benzene, divinyl biphenyl, vinyl fluorene, chlorinated divinyl benzenes, chlorinated vinyl naphthalenes, acenaphthylene, acrylic and methacrylic acids, methyl, ethyl, butyl, amyl, lauryl, benzyl, p-chlorobenzyl, allyl, and methallyl acrylates, ethylene diacrylate, glyceryl diacrylate, methyl, butyl, hexyl, benzyl, and allyl methacrylates, diethylene dimethacrylate, methyl and propyl chloroacrylates, ethyl bromoacrylate, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, dimethyl fumarate, diethyl maleate and itaconate, diallyl fumarate and citraconate, dimethallyl maleate and itaconate, triallylaconitate, diethylene glycol maleate, dipropylene glycol maleate and fumarate, methylene methyl malonate, methylene ethyl malonate, vinyl and vinylidene chlorides, fluoroethylenes, chlorofluoroethylenes, tetra-allyl silane, and polyallyl esters of inorganic polybasic acids.  The oxygenated esters may be employed in small quantities in admixture with the polymerizable monomers to act as polymerization catalysts, or may be employed in larger quantities to form copolymers with the polymerizable monomers. Polymerization may be carried out in bulk, in solution, for example in acetone, or in aqueous emulsion using an emulsifying agent such as an alkyl aryl polyether alcohol; also present during polymerization may be plasticizers and fillers.  The polymers produced may be used alone or with other insulating material in electrical insulation, and as dielectric materials.  The device to be treated may be impregnated with monomeric material which is then polymerized in situ.
Patent GB-926299-A (GB)
Title: Improvements in or relating to automatic feed regulators
Inventor: ROBINSON KENNETH ARTHUR
IPC: H02P29/00
Filed: 1960-05-09
Abstract: 926,299. Control of two motors. LANCASHIRE DYNAMO ELECTRONIC PRODUCTS Ltd. May 9, 1961 [May 9, 1960], No. 16337/60. Class 38 (3). [Also in Group XXXV] The speed of a feed motor M 2  is controlled in accordance with the load on a grinder motor M 1 , the load being measured by means of resistor R 2  which produces a signal for comparison with a reference signal in comparator D, the difference between the signals tending to zero. Between the unit D and regulator F for the motor M 2  is inserted an integrating circuit comprising resistor R 1  and capacitor C, an amplifier A feeding energy back to the capacitor so as to magnify the potential difference across the capacitor due to current in the resistance. Small variations of load current cause gradual variations in the speed of the feed motor until the load is restored to its normal level. If a sudden increase in load causes the output of unit D to overcome the bias voltage of source H, the resistor R 1  is by-passed through rectifier G, so that the control signal passes directly to the regulator F and slows down or stops the motor M 2  immediately.
Patent GB-457798-A (GB)
Title: Production of fast dyeings
IPC: D06P3/82
Filed: 1935-06-05
Abstract: Fast even dyeings on half-wool or mixtures of wool and linen are produced by first treating the material with an agent yielding oxygen, then grounding with an alkaline solution of an o-hydroxyaryl carboxylic acid arylide which advantageously contains a highly active wetting agent, dehydrating by squeezing and developing with a diazo solution.  According to examples: (1) half-wool is treated over-night in aqueous hydrogen peroxide containing sodium pyrophosphate, rinsed, dried, padded with 1-(2<1> : 3<1>-hydroxynaphthoylamino) - 2 - methyl - 4 - chlorobenzene, alcohol, caustic soda, formaldehyde, oleylmethyltaurine, sulphite cellulose waste liquor and sulphonated oleic acid ethylanilide, squeezed, developed with diazotized 1-amino-2-methyl-4-chlorobenzene containing the reaction product of ethylene oxide (20 mols.) and octodecyl alcohol (1 mol.), passed through air, rinsed, after-treated with a solution containing oleylmethyltaurine and acetic acid and rinsed; an even bright red is obtained; a fabric from wool (25 per cent) and linen (75 per cent) may be similarly dyed; (2) half-wool is bleached as in (1), grounded with a solution of 1-(2<1> : 3<1>-hydroxynaphthoylamino) - 4 - methoxybenzene, alcohol, formaldehyde, caustic soda, oleylmethyltaurine and sodium chloride, squeezed, developed with a solution of diazotized 1-amino-2-methoxy-4-nitrobenzene containing the above ethylene oxide-octodecyl alcohol condensation product and acetic acid and finished as above (even bordeaux-red); (3) an even brown shade is obtained using 1-(2<1> : 3<1>-hydroxycarbazolecarboylamino)-4-chlorobenzene as in (2).
Patent GB-292501-A (GB)
Title: Mineral tanning process
IPC: C14C3/04
Filed: 1928-06-06
Abstract: 292,501. Rohm, O. June 20, 1927, [Convention date]. Chrome, iron, and like mineral tanning.-The salts of iron, chromium or aluminium are employed in conjunction with orthophosphoric acid or salts or esters of this acid. Examples describe the use of (1) iron sulphate chloride, orthophosphoric acid, and sodium carbonate; and (2) alum, glycerine phosphoric acid, and salt. The phosphoric acids or salts may be applied during greasing. Specification 270,267 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes also the use of phosphoric acids in general and of arsenic acid and of salts or esters of these acids. This subjectmatter does not appear in the Specification as accepted.