baber/WOPTO huggingface dataset:
Patent GB-1392511-A (GB)
Title: Flyback eht and sawtooth current generator
IPC: H03K4/62
Filed: 1972-04-17
Abstract: 1392511 EHT supplies PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 17 April 1972 [20 April 1971] 17596/72 Heading H2F [Also in Division H3] A flyback EHT and sawtooth current generator for TV apparatus includes switching means which is periodically non-conducting during flyback periods # and conducting during scan periods T-# and a sixth order network connected to the switching means and comprising a transformer having at least one primary winding and a secondary winding feeding a rectifier for generating said EHT from voltage pulses occurring during the flyback periods, said network having three resonant frequencies substantially equal to: where K = 1, 5 and 7 and S is a correction factor based on the extent of S-correction. The invention reduces the internal resistance of the EHT generator by providing voltage pulses having wide, flat tops. Fig. 4 shows a line output stage in which the switching means is transistor 12, coupled to balanced primary windings 2a, 2b of transformer 1 feeding deflection coils 9 via an S-correction capacitor 11 and linearizing components 10. The sixth order network is provided by a tertiary winding 5 and a parallel resonant circuit 16, 17, together with self-capacitance and leakage inductance. A voltage-multiplying EHT rectifier 14 may be employed. The balanced arrangement minimizes radiation. An inductor 19 is arranged to speed up turn-off of transistor 12. Diode 20 and the base-collector diode of transistor 12 provide damping. In Fig. 5 (not shown), the emitter is earthed and the supply E connected between earth and a tapping on the primary winding. Resonant circuit 16, 17 is connected between the upper end of the primary and the lower end of the EHT secondary 4. In Fig. 7 (not shown), the resonant circuit 16, 17 is connected into series with capacitor 13 and the tertiary winding 5 is omitted. Detailed equivalent circuits are provided. Expressions are given for optimum relationship between various parameters. Reference is also made to values of K equal to 1, 3, 5 or 1, 3, 7, but such arrangements are stated to be impracticable and outside the scope of the invention.
Patent GB-110059-A (GB)
Title: Improvements in or relating to the Vulcanisation of Rubber and similar Materials.
IPC: C08K9/02
Filed: 1916-10-09
Abstract: 110,059. Dunlop Rubber Co., and Twiss, D. F. Dec. 9, 1916. Vulcanizing-materials.-A vulcanization accelerator consists of caustic alkali (sodium or potassium hydroxide) in conjunction with quicklime, glycerol, glycol, or other finely divided mineral compound which is inert towards the alkali or organic compound which without decomposition absorbs or dissolves the alkali to produce a homogeneous mass.
Patent GB-184650-A (GB)
Title: Gauge and marker for use in connection with knitting and crochet
IPC: D04B3/00
Filed: 1921-06-30
Abstract: 184,650. Davidson, E. J. June 30, 1921. Crochet-wort.-A scoring device for use in connection with knitting and crochet work, combined with a scale of inches and holes for gauging the size of knitting needles, comprises a triangular piece of metal f graduated along the edges, carrying clock dials a, b, c with manually moved pointers and perforated with graded holes e.
Patent GB-461742-A (GB)
Title: Improvements in or relating to the production of polyhydric alcohol-polybasic acid resin
IPC: C08G63/48
Filed: 1935-06-21
Abstract: Oil-soluble resinous compositions are prepared by condensing a polyhydric alcohol such as glycerol, a volatile monobasic aliphatic acid having up to five carbon atoms, an acid or acids obtainable by hydrolysis of an oil or fat in a quantity sufficient to esterify some but not all of the hydroxyl groups in the polyhydric alcohol molecule, and a polybasic aliphatic acid such as maleic, succinic, malic or fumaric acids and continuing the reaction in the presence of a solvent until the volatile acid has been expelled.  The glycerol may be first reacted with the volatile acid and the dibasic acids may be replaced in part by phthalic acid.  The products, which are oil-soluble, are compatible with varnish bases such as ester gums, wood oil, fossil gums, phenol-aldehyde condensates, coumarone resins, asphaltums, pitches and waxes and may be used in the manufacture of varnishes, lacquers, enamels and paints.  In examples, an interaction product of glycerol and acetic acid is condensed with maleic anhydride and linseed-oil fatty acids in the presence of solvent naphtha, the solvent being added, if desired, after the initial condensation has been effected.  Specifications 352,981 and 395,894 are referred to.
Patent GB-145663-A (GB)
Title: Improvements in or relating to suction cleaners
IPC: A47L9/04
Filed: 1920-06-30
Abstract: 145,663. Hoover Suction Sweeper Co., (Assignees of Hoover, H. E.). Oct. 8, 1917, [Convention date]. Carpet - sweepers. - In a vacuum-cleaner, a series of guardfingers extend rearwardly from the forward end of the suction mouth and terminate short of the rear wall. Fig. 2 shows the suction hood of a vacuum-cleaner having guard-fingers G secured to a bar F connecting pivoted plates B mounted on the end walls of the suction hood; the fingers terminate short of the rear wall and are turned up at their ends. The plates B support plates C pivoted on them in adjustable position and supporting the brush shaft D. Specification 112,729 is referred to.
Patent GB-1124431-A (GB)
Title: Straddle carriers
Inventor: GORDON RICHARD OSCAR
IPC: B66C19/00
Filed: 1967-04-19
Abstract: 1,124,431. Straddle carriers. CLARK EQUIPMENT CO. 19 April, 1967 [14 July, 1966], No. 17932/67. Heading B8H. The load supports 20, 22 of a straddle carrier are secured to the cylinders of four hydraulic rams, the piston-rods of which are suspended from the frame 12, each cylinder being connected by a linkage 130 to an associated control valve mounted on the frame 12 to allow flow of fluid when the cylinder has moved through a predetermined distance, to synchronize the operation of the rams. The hydraulic circuit of the system is described in detail, Fig. 2 (not shown).
Patent GB-504683-A (GB)
Title: Improvements in apparatus for grading objects according to their effects on a light beam
IPC: B07C5/34
Filed: 1938-06-16
Abstract: 504,683. Photo -electric. sorting apparatus. BOTH, E. T. June 16, 1938, No. 17949. Convention date, June 19, 1937. [Class 40 (iii)] Relates to apparatus for sorting objects according to their effects on a light beam by means of an air jet controlled by a photoelectric device. According to the invention, a movable shutter 16 is arranged to operate in a plane between the end of the nozzle 15 and the scanning area. As shown in Fig. 1, the objects to be sorted are carried on a belt 1 to the scanning area between a lamp 7 and a photo-cell 9, which is carried by a sliding member 10 secured in adjusted position by clamping means 12. Selected objects are blown off the belt by the jet 15. In another form, Fig. 4, the objects are fed down a channel 30 to a scanning slot 32 between a lamp 7A and a photo-cell 9A, and selected objects are blown over a wall 35. The channel 30 is reciprocated longitudinally to cause the feed of the objects. The objects may be fed in any other suitable way, for example by a rotating disc, or may fall freely through the scanning area. The shutter shown is a flexible blade constituting the armature of an electromagnet. The adjustment may be such that normally the shutter is in an intermediate position just sufficient to cut off the jet and moves in one direction or the other according to the optical effect of the object. This may be obtained by an adjustment of the bias of the photo-cell. Filters may be used for selection according to colour.
Patent GB-906714-A (GB)
Title: Improvements in or relating to pressure rollers
Inventor: PICKLES JOHN
IPC: D06C15/02
Filed: 1958-06-05
Abstract: 906,714. Preparing fibres for spinning. CARDING SPECIALISTS (CANADA) Ltd. May 21, 1959 [June 5, 1958], No. 18000/58. Class 120 (1). Means for loading a roller that has its shaft ends movably guided comprises a pair of pivoted doublearm members, one arm of each member supporting a weight 13 and the other engaging a guided ball 19 through which pressure is applied to the roller shaft. The weight may consist of a bar 13 extending between and adjustably carried by the arms 12. Alternatively, the loaded arms 12 may be adjustable in pivoted members 11, or the arms may be connected to a central arm carrying an adjustable weight. Specification 697,106 is referred to.
Patent GB-712323-A (GB)
Title: Improvements in or relating to methods for use in the growing of crystals
IPC: C30B7/00
Filed: 1951-07-30
Abstract: Surface cracking of crystals, due to cooling after removal from the tank in which they have been grown at a raised temperature, is prevented by immersing the crystals, as soon as they have been removed from the tank, in a liquid which is immiscible with the solvent of the growing solution, in which the crystals are insoluble, and which has a relatively low volatility and latent heat of evaporation at the ambient temperature, the temperature of the liquid being initially the same as that of the crystals and then being brought or allowed to alter gradually to the ambient temperature. The crystals are then removed from the liquid and dried.  The apparatus described in Specification 707,977 may be used to carry out the operation, viz; a temperature controlled oven with a sliding door in its underside and having humidifying means inside.  The oven is first positioned over the growing tank, the crystals are lifted up and the oven then positioned over a tank of the liquid into which the crystals are lowered.  The operation is described with reference to ethylene diamine tartrate crystals using paraffin oil as the liquid. Specifications 707,976 and 707,978 also are referred to.
Patent GB-229622-A (GB)
Title: Improved manufacture of cathoders for electric discharge tubes
IPC: H01J9/04
Filed: 1924-07-28
Abstract: 229,622. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Feb. 18, 1924, [Convention date]. Drawings to Specification. Vacuum tubes.-A process of making an oxide cathode for a thermionic valve consists in coating with one or more alkaline earth metals a core having at least part of its surface consisting of an oxide of one or more metals, for instance, copper or nickel, capable of alloying with the alkaline earth metals, and heating the coated core in a non-oxidizing atmosphere so that the coating melts; the coating is oxidized by the reaction between the alkaline earth metal and the oxide or by a subsequent process. Copper or other metal may be applied by electrolysis to a core of a metal or alloy, for instance molybdenum or nickel-chromium, which does not alloy with alkaline-earth metals, and the copper is partly or wholly oxidized by heating in air; or a core of a refractory metal such as palladium, nickel, or platinum or platinum alloy may ba used. The treated core is coated. with alkaline earth metal by distillation, by applying the metal to the surface and fusing, or by coating with a compound of the metal which decomposes by heat. For instance, wire may be coated evenly with barium azide and mounted in the bulb of a valve, and the bulb heated in a furnace, the nitrogen evolved being evacuated. The coating may be oxidized by exposure to dry air, but in some cases this operation may be unnecessary owing to oxidization by the copper oxide or impurities. Some of the barium may be left unoxidized so as to act as a gas-purifying agent. An improved electron emission is obtained by heating the electrode subsequently in a reducing atmosphere such as hydrogen or magnesium vapour; for this purpose magnesium may be applied to the anode and evaporated by electron bombardment. A wire may be treated in the manner described above by a continuous process. Specification 209,730 is referred to.
Patent GB-594341-A (GB)
Title: Improvements in or relating to heat exchangers
IPC: F28F9/02
Filed: 1943-11-01
Abstract: 594,341. Tubular heat-exchangers. CLIFFORD MANUFACTURING CO. Nov. 1, 1943, No. 18040. Convention date, Oct. 12, 1942. [Class 64 (iii)] In a heat-exchanger comprising a large number of closely spaced tubes 8 of small diameter each having a ferrule 11 with a cylindrical part 12 engaging the end of the tube and a polygonal end part 14, the sides of which are in contact along their whole lengths with the sides of adjacent ferrules, the tube ends protrude beyond a header plate 6 and each ferrule has an intermediate constricted portion 16 abutting against the tube end and projecting into the interior of the ferrule an amount substantially eaual to the wall thickness of the tube. The ferrules may be secured in position after assembly by dipping the ends of the unit in a bonding agent of high melting point or a plastic compound or varnish. The Specification as open to inspection under Sect. 91 comprises also a form in which the tubes are flush with the header plates, and the cylindrical portions of the ferrules are inserted into the tubes, and a modification in which the cylindrical portion has an integral extension of S cross-section to extend across the tubes and bear at its edges against the tube wall. This extension both holds the ferrule in place and acts as a heat-conducting web. This subject-matter does not appear in the Specification as accepted.
Patent GB-334303-A (GB)
Title: Improvements in and connected with carburettors for internal combustion engines
IPC: F02M37/02
Filed: 1929-06-13
Abstract: 334,303. Kerruish, T. June 13, 1929. Vacuum apparatus.-In a fuel supply system for a car. buretter, in which fuel is drawn through a pipe 10 into a float chamber 8 from a low-level tank by engine suction acting through a pipe 9, the float 11 relieves the suction by opening an air valve 13, and a non-return valve 15 enables the fuel to flow into the main chamber which supplies the nozzle 4. The chamber 7 is formed as a unit with the carburetter body. Lost motion may be provided between the float and the stem of the valve 13, which may be held open by balls engaging an annular groove in the valve stem. The valve 13 may be replaced by a ported plug valve.
Patent GB-1198923-A (GB)
Title: Process for the Preparation of the Dextrorotatory 2, 2', (Ethylenediimino)-di-1-butanoldihydrochloride
Inventor: ZOJA GIORGIO
IPC: C07C215/14
Filed: 1968-04-18
Abstract: 1,198,923. Ethambutol salt preparation. LABORATORIO CHIMICO FARMACEUTICO GIORGIO ZOJA S.p.A. 27 Feb., 1969 [18 April, 1968], No. 18491/68. Heading C2C. Ethambutol dihydrochloride is prepared by reacting racemic 2-aminobutanol with (+) tartaric acid in aqueous solution, separating the resulting diastereoisomers by fractional crystallization with boiling MeOH, reacting the ( + ) 2-aminobutanol (+) hydrogen tartrate with ethylene dichloride in the presence of an inert organic solvent and CaO or Ca(OH) 2  under reflux, concentrating the solution, removing the insoluble calcium salts and saturating with HCl
Patent GB-1498772-A (GB)
Title: Pigment suspending agents in paint systems
IPC: C09D7/45
Filed: 1976-05-05
Abstract: 1498772 Pigment suspending agents for paints NL INDUSTRIES Inc 5 May 1976 [15 May 1975] 18506/76 Headings C3F C3P C3Q and C3R A combination of an emulsifiable polyethylene wax and a sulphated-sulphonated castor oil is used to suspend pigments in a non-aqueous paint system. The composition is preferably added in the form of a creamy paste which is prepared by dissolving the sulphated-sulphonated castor oil in a solvent, adding the polyethylene, heating to melt and cooling under high shear. Suitable paints include alkyd baking enamel, vinyl primer, chlorinated rubber primer and nitrocellulose lacquer.
Patent GB-418074-A (GB)
Title: Improvements in or relating to the manufacture of dyestuff pastes for copying papers, typewriter ribbons, duplicating stencils and the like
IPC: B41M5/10
Filed: 1933-06-29
Abstract: Dyestuff pastes for copying purposes contain as solvent or dispersing medium or base material one or more saturated or unsaturated mono- or polyvalent fatty alcohols containing more than six carbon atoms, or naphthenic alcohols, or their corresponding simple or mixed ethers, or mixtures of such substances.  Stearyl alcohol, cetyl alcohol, oleic alcohol, ricinoleic alcohol, coco-nut oil fatty alcohol, linseed oil alcohol, naphthenic alcohols, a commercial mixture of any of these alcohols, dicetyl ether, didecyl ether, didodecyl ether, cetyl octyl ether, dodecylbutyl ether, and dinaphthenyl ether are specified for use.  One or more sulphuric acid reaction products of the said alcohols or the products obtained by their complete or partial neutralization with organic or inorganic bases may be added as emulsifying or dispersing agents, and hydrocarbons, waxes, fats, oils and fatty acids may also be added.  In one example, copying papers are prepared by applying a mixture of crystal violet, alcohol, dicetyl ether, oleic alcohol and paraffin oil to "Japan" paper.  In a second example, a mixture of nigrosine, lauryl or ricinoleic alcohol, stearyl alcohol, montan wax or spermaceti, or hydrogenated sperm oil, and paraffin oil is used.  In a third example, typewriter ribbons are prepared from a mixture of Berlin Blue, a neutralized aqueous paste of oleic alcohol sulphonate, stearyl alcohol, and oleic alcohol.  In a fourth example, a paste for application to permanent matrices or duplicating stencils consists of carbon black, naphthenic alcohols, cetyl alcohol, oleic alcohol, and beeswax or tragacanth. p Reference has been directed by the Comptroller to Specification 395,225, [Group XVI].
Patent GB-809085-A (GB)
Title: Improvements in or relating to plug type connector sleeves for gas appliances
Inventor: BURKE PATRICK HERBERT
IPC: F16L37/252
Filed: 1956-06-15
Abstract: 809,085. Pipe connectors. GAS COUNCIL. Sept. 3, 1957 [June 15, 1956], No. 18653/56. Class 99(1). A connector for detachably connecting a  flexible pipe to a gas tap 15 comprises a male, tubular member 3 adapted to be pressed into a female seating 14 in the tap by a spring 4 acting between the member and a sleeve 1 longitudinally movable relatively to the member. One end of the sleeve is releasably attachable to the tap, and the other end is attachable to the pipe and has a bore connected in gas-tight manner to the bore of the member. As shown in Fig. 2, the member 3 is provided with a spherical seating 13 and is axially slidably in the bore 2 of the sleeve 1 ; the spring 4 urges the flange 8 of the member against pins 7 of the sleeve when the latter is uncoupled. The member also has an annular groove 10 in which is located a synthetic rubber 0-ring 9. The connector is coupled to the tap by engaging the seating 13 with a conical seating 14 of the tap and moving the pins 7 into bayonet slots 16, rotation of the sleeve relative to the tap completing the coupling operation. In modifications, the gas-tight joint between the sleeve and the member 3 is formed by (a) a packed gland, the packing of which is compressed by a spring disposed between the flange 8 and the gland, and (b) a flexible tube 75, Fig. 4, connected to the member 53 and a spigot 73 in the sleeve and tensioned by a spring 54, the flange 58 of the member being slidable in the bore of the sleeve.
Patent GB-256770-A (GB)
Title: Improvements relating to metal milling machines
IPC: B23Q1/54
Filed: 1925-07-22
Abstract: 256,770. Ord, L. C. July 22, 1925. Milling-machines. - An automatic milling- machine comprises a pivotally mounted cutterframe supported in the operative position on abutments and having fluid-operated means under the control of the work-table for swinging the cutterframe into and out of operative position. As applied to a machine of the planer-type the cutters d are mounted on an arbor carried bv a frame comprising arms h and a boss c pivoted at g on a pair of uprights d. The arbor is rotated by gearing carried by the frame and supported on a bracket extending from the latter. The frame is oscillated to carry the cutters to and from the work t by means of pneumatic or hydraulic cylinders k, l, and a bell-crank lever m, the working position being determined by stops n. For varying the depth of cut the stops are simultaneously adjustable by vertical screws wormdriven from a hand-wheel r. Tappets p, q, on the table f are adapted to actuate a valve or valves to control the fluid supply to the cylinders so as to raise the cutters during the idle stroke and lower them during the catting stroke, the action being such that the cutting resistance of the tools forces the frame on to the stops n. The table f is reciprocated by a rack and worm or other gears and is reversed by adjustable stops of known kind. A plurality of cutter-frames may be employed on the same or separate pivots and the cutters may operate on horizontal, vertical or inclined surfaces of the work. The tools may be lifted from the work at intermediate points as well as at the end of the travel of the table if portions of the work are not to be operated upon.
Patent GB-496196-A (GB)
Title: Improvements in colour development and colour forming developers
IPC: G03C7/34
Filed: 1937-05-24
Abstract: 496,196. Colour photography. KODAK, Ltd. (Eastman Kodak Co.) May 24, 1937, No. 18741/38. Divided out of 496,245. [Class 98 (ii)] A colour forming developer comprises an aromatic amino developing agent and a colour former consisting of a compound containing the grouping where N<(1)> and N<(2)> may be linked to C<(1)> and C<(2)> or N<(1)> and N<(2)> may be linked to hydrogen while C<(1)> and C(2) are linked to O Alkyl. Examples of such compounds are 1 :4-phenylene-di-3-( 1:phenyl-5-pyrazolone) and 1 : 4-di-(carbethoxyacetyl)-benzenediphenylhydrazone. The developing agents may be mono-, di-, and tri-amino aryl compounds, such as aminophenols and aminocresols and their halogen substituted derivatives, aminonaphthols, p-phenylenediamine, alkylphenylenediamines such as diethyl-p-phenylenediamine, monomethyl-p-phenylenediamine, dimethyl-pphenylenediamine, and o-aminodiethylaniline, toluylenediamine, alkyltoluylenediamines and aminodiphenylamines, including the hydrochlorides and sulphates. An example of a suitable developing formula containing the colour formers is given. The colours formed are shades of magenta. The colour formers may also be incorporated in the emulsion before or after exposure, and may be adsorbed upon the silver halide grains. The emulsion may be on films, plates, or paper, and gelatine or other colloid may be employed in the emulsion. Material comprising several differently sensitized emulsions on one or both sides of the support or comprising emulsions of the mixed grain type may be used. The dyes formed may be decolourized by an oxidizing agent such as chromic acid. Specifications 427,472, 427,516, 427,518, 427,520, 440,032, 440,089, and 447,092 are referred to.
Patent GB-812435-A (GB)
Title: Improvements relating to vehicle road wheel suspensions
IPC: B60G21/04
Filed: 1956-06-18
Abstract: 812,435. Controlling motor vehicles. DAIMLER-BENZ A.G. June 18,1956 [June 24, 1955], No. 18807/56. Class 79(5) [Also in Group XXXII] The relative stiffnesses of the respective spring suspensions on each side of a motor vehicle, are varied by the driver tilting the steering wheel 39 laterally about pivots 40, 40, on the steering column. Rollers 37 carried by the hub 38 of the steering wheel 39, engage a grooved track in a member 37a rigid with a rod connected to a valve controlling a hydraulic cylinder which acting upon the suspensions (see Group XXXII).