baber/WOPTO huggingface dataset:
Patent GB-1034925-A (GB)
Title: Improvements in or relating to bridge circuit arrangements
IPC: H03H7/48
Filed: 1963-02-08
Abstract: 1,034,925. High-frequency bridges. TELEFUNKEN PATENTVERWERTUNGSGELLSCHAFT m.b.H. Feb. 8, 1963 [Feb. 9, 1962], No. 5202/63. Heading H1W. [Also in Division H4] A bridge circuit is used to couple the unbalanced outputs of two generators, which operate at the same frequency, to a common load or to a pair of loads, e.g. aerials. The circuit is based upon a known type of bridge having identical reactances, e.g. capacitors C, Fig. 2, in two adjacent arms and identical impedances, e.g. R and L, in the other two arms. Of the two identical resistances R, one (RA) provides the load and the other (LAW) provides a balancing impedance. In the known bridge (Fig. 1), generator G 1  is connected between terminals I and II, generator G 2  between terminals III and IV, neither of which are at earth potential. According to the invention, generator G 2  is connected to terminals III, IV through a coaxial line LK<SP>1</SP> 13  whose outer conductor provides an inductance equal to L. The Specification explains how the two generators may be matched to the bridge over a range of frequencies by the addition of further components to build up matching #-sections. The general form of the resulting circuits of the two generators G 1 , G 2  is depicted in Figs. 5, 7 (not shown). These circuits have the disadvantage that the generator G 1  works into a resistive load R/2 whilst generator G 2  works into a load 2R. In a modification, the symmetrical bridge circuit shown in Fig. 8 is used, some or all of the reactances being replaced by lengths of coaxial line in the above-described manner to obtain the results depicted in Fig. 11 or Fig. 12 (not shown). A structural realization of the invention for use at higher frequencies (Fig. 13, not shown) uses a symmetrical double-resonant circuit in the form of a totally-enclosing outer conductor with axiallyaligned inner conductors forming quarterwave resonators.
Patent GB-251720-A (GB)
Title: Improvements in or relating to stoves, air heating-apparatus
IPC: F26B21/00
Filed: 1925-02-25
Abstract: 251,720. Wells, G. F. Feb. 25, 1925. Air-heating furnaces. - Apparatus for heating air, particularly for use in drying, japanning and enamelling, is carried on a wheeled frame g and comprises a fire-box a adapted to heat the ends of Perkins tubes e which extend, in an upwardlyinclined direction, into a chamber d having vertical baffles n, o, p, and through which air is drawn from a chamber k by a fan f. When long tubes are used, they are exhausted of air, before being finally sealed, by boiling the contained water, the air escaping through a small hole which is subsequently plugged.
Patent GB-1261442-A (GB)
Title: Speed control circuits for electric motors
IPC: H02P7/293
Filed: 1969-01-30
Abstract: 1,261,442. Control of D.C. motors. HEBERLEIN & CO. A.G. 30 Jan., 1969 [1 Feb., 1968], No. 5253/69. Heading H2J. [Also in Division G3] An electric motor control circuit comprises means 2 for deriving a control voltage E representative of the speed of the motor and means responsive to the control voltage-to provide an energizing voltage U to the motor said energizing voltage increasing with increase in speed below a first predetermined speed n 1 ; being constant between said first and a second predetermined speed n 2  and decreasing with increase in speed above the second speed. Thus normal speed regulation occurs above n 2  but below n 1 , the motor cannot draw excessive current. In simple arrangements (Figs. 3, 4, not shown) individual voltages V 1  and V 2  inversely and directly proportional to the control voltage E and a constant voltage U max  are generated and fed to low value gates which select the lowest value which is then applied to the motor. Alternatively individual firing pulses can be generated and gates select the later pulses for application to a thyristor to control the motor. In Fig. 5 the motor is energized by a thyristor 11 fired by a unijunction transistor 41 when a capacitor 43 reaches a predetermined value. The capacitor 43 is charged to a pedestal voltage rapidly at the beginning of each half cycle of the supply through resistor 45 and subsequently more slowly through a resistor 44. The pedestal voltage is dependent upon the value of the control voltage E from a tachometer generator 2 so that as the voltage E increases the thyristor is fired later as described in Specification 1,139,320. As voltage E decreases the pedestal voltage increases, the thyristor firing earlier, until it is great enough to fire the thyristor immediately and maximum voltage is applied. At lower values of voltage E a transistor 50 is rendered conducting at the start of each half cycle of the supply so that the charging of the capacitor 43 is delayed and the thyristor fires later. The control voltage E may be derived from the motor back-E.M.F. instead of the tachogenerator 2.
Patent GB-682098-A (GB)
Title: Improvements in or relating to an appliance for passing a double strand of flexible material through fabric or other piercable material
IPC: D04G3/02
Filed: 1950-03-02
Abstract: 682,098. Hand shears. MOSS, D. J. March 2, 1951 '[March 2, 1950], No. 5313/50 Class 30 [Also in Group VII] A pair of tufting scissors (comprises two members 1, 2 hinged together, in which at least one of the members has a notch therein. One member is preferably longer than the other and has a pointed end which overlies and forms a continuation of the end of the other member. A spring-actuated stop determines the relative position of the blades when engaging a' thread therebetween and a stop 14 limits the penetration of the blades into the material. The blades may be mounted on the ends of the limbs of a U-shaped member or formed integral therewith or pivoted together at their base.
Patent GB-556208-A (GB)
Title: Arrangement for conversion of frequency modulation to phase modulation and the application thereof to the production of a frequency modulated wave from a frequency stable oscillator
IPC: H03C3/00
Filed: 1941-04-25
Abstract: 556,208. Frequency and phase modulation. STANDARD TELEPHONES & CABLES, Ltd., and EARP, C. W. April 25, 1941, No. 5358. [Class 40 (v)] Converting phase modulation to frequency modulation. A loop circuit comprises two modulators M3, M4, Fig. 2, and two tuned filters X3, X4 with or without a delay network D2. The filters are tuned respectively f and F  f. A stable frequency source O applies the frequency F directly to the modulator M4, and through a phase modulator PM to the modulator M3. The filters and/or the delay network are arranged to give a phase shift proportional to frequency deviation, and the loop generates oscillations of mean frequencies f and F tf with a frequency deviation proportional to the phase shift in the modulator PM. The loop may be caused to oscillate initially by switching in a source OS. The phase modulator PM may be of the kind described in Specification 534,955 and as shown in Fig. 1. In this diagram a frequency-modulated wave from A of mean frequency f is combined in a modulator M1 with waves of stable frequency F from a source O. The sum (or difference), frequency is selected by a filter X1 and passed through a delay network D1 to a modulator M2 where it is combined with the original frequencymodulated wave from A. The resulting difference (or sum) frequency is selected by a filter X2, and consists of a phase-modulated wave of the stable frequency F. The filter X1 and/or the network D1 are designed to give a phase shift proportional to frequency.
Patent GB-807596-A (GB)
Title: Improvements in or relating to refrigeration systems
IPC: F24F5/00
Filed: 1957-02-18
Abstract: 807,596. Compressors. CARRIER ENGINEERING CO. Ltd. Feb. 18, 1957 [Sept. 17, 1956(2)], No: 5479/57. Class 8(1). [Also in Group XIII]. A compression refrigerating system comprises a reciprocating compressor 2a, prime mover 3a, condenser 4a, evaporator 6a and a control device, preferably a constant pressure valve 8a, set between the condenser and evaporator to maintain a constant suction pressure, the compressor having a predetermined cylinder clearance adequate to contain a sufficient amount of compressed refrigerant that the total weight of refrigerant entering the cylinder is varied an amount to maintain the work load on the prime mover constant. The cylinder clearance is between 7 and 15 per cent. of the cylinder volume, preferably 11 per cent. In Fig. 2 the prime mover is an electric motor having a common shaft 18a with the compressor 8a, both being enclosed in a hermetically sealed casing refrigerant gas passing from an entry manifold 24a over the motor before entering the cylinder head.
Patent GB-1503572-A (GB)
Title: Horticultural conditioning plant
IPC: A01G9/24
Filed: 1975-02-10
Abstract: 1503572 Treating plants INTREPRINDEREA METALUL ROSU 10 Feb 1975 [1 March 1974] 5503/75 Heading A1E Apparatus for controlling the environment in a greenhouse comprises a water tank I having a connection 3 to an irrigation network (not shown), an axial flow fan 15 operable to draw air through controllable louvres 7, 8 from outside and inside the greenhouse respectively, air recirculated through louvres 8 being heatable by a heater 9, and means for selectively supplying water for humidification or cooling, carbon dioxide, fertilizers and pesticides through spray nozzles 28 for dissemination by the fan 15. Drops of water are removed by a separator 54 downstream of the fan and are discharged to the irrigation tank 1.
Patent GB-234897-A (GB)
Title: Improvements in chain grate and the like stokers
IPC: F23H11/04
Filed: 1924-03-04
Abstract: 234,897. Bennis, A. W. March 4, 1924. Grates.-In a link for a chain grate of the kind in which the eye portions of the links are half the width of the body portion and lie on opposite sides thereof, the pivot holes 2. Fig. 3, are arranged below the middle of the link. Dowels 11 and sockets 12 are arranged on the sides of the link and engage with sockets and dowels on adjacent links. The body portion of the link is extended at 5 to overlap the end of an adjacent link while the links are horizontal. During the passage of the links around the drums a space 6 is formed between the links to allow for the passage of ash. The intermediate, and side driving links as shown in Fig. 1 are of greatest width at their upper and lower portions 9, 10. Fig. 6 shows a link of the renewable locking type adapted to engage with its pivotal supporting rods by slots 2<d> arranged at right angles, although the slots may be arranged at other angles or may be parallel. Specifications 15222/14, 222,537, and 232,666 are referred to.
Patent GB-658337-A (GB)
Title: Improvements in apparatus for freezing ice cream and other fluent materials
IPC: A23G9/16
Filed: 1949-03-01
Abstract: 658,337. Ice-cream freezers. CREAMERY PACKAGE MANUFACTURING CO. March 1, 1949, No. 5580. Convention date, March 13, 1948. [Class 29] [Also in Group II] Apparatus for freezing ice-cream or other fluent material comprises a cylinder 1 having a freezing jacket 3, 4 and containing a longitudinally-extending dasherbody 21 formed with from three to six plane or slightly concave or convex faces 22 meeting in corners 23, each face carrying a pivoted scraper blade 34. The irregular form of the dasher-body aids the mixing and, since the body is closed, no central stagnant area is formed in the mix. Ice cream mix and air are pumped into the cylinder through pipes 19, 20 respectively and the frozen product is withdrawn by a pump through a pipe 12. The entry end of the dasher-body 21 carries four scrapers sweeping the same area of cylinder wall but slightly staggered and the exit end carries four scrapers staggered so that the cylinder wall is traversed by two scrapers only. The scrapers 34, which have sharpened edges, are reversible so as to be self-sharpening. The dasher may be removed after removal of a plate 14 secured by screws 15. In modifications, the dasherbody 21 may have three faces or may taper from one end to the other. The cylinder is provided with an inspection opening 16.
Patent GB-808432-A (GB)
Title: Process of making fermented malt beverages
IPC: C12H1/04
Filed: 1956-02-23
Abstract: In the manufacture of fermented malt beverages such as beer and ale, the beverage is brought into contact with an ion-exchange resin insoluble in the beverage for a limited time such that the protein content of the beverage is reduced by not more than 15 per cent, preferably 5 to 15 per cent, of its initial weight. Cationic-exchange resins exemplified are the copolymers methacrylic acid-divinyl benzene and sulphonated polystyrene-divinylbenzene.  Anionic-exchange resins may be weakly or strongly basic and are exemplified respectively by the reaction products of primary and secondary amines with a halomethylated vinyl aromatic resin and the reaction products of tertiary amines with a halomethylated vinyl aromatic resin. Various vinyl aromatic resins and amines are specified as starting materials.  A mixture of anionic and cationic exchange resins may be employed to treat the beverage.  The treatment may be carried out batchwise or continuously, the time of contact between beverage and resin lying preferably between 10 seconds and 10 minutes, and the proportion of resin in the batch treatment being preferably within 0.01 to 1 per cent by weight of the beverage treated.  The ion-exchange resin is preferably conditioned before use by treatment with a beer or suitable salt or buffer solution, e.g. sodium dihydrogen phosphate in water, having a pH within the range 4.0 to 4.4 and approximately equal to the pH desired in the treated beverage. Examples describe both batch and continuous treatments of beer by stirring it with resin and by passing it up a copper tube containing the resin at a rate of flow regulated by carbon dioxide pressure differences between starting and receiving barrels.  The treatment may be applied at various stages of production such as after fermentation, during filtration or just prior to bottling. It is said to improve the stability of beverages with regard to haze, odour, and flavour, to lighten the colour of dark beers and to effect ageing of freshly fermented beer without storage being necessary. Specification 732,543 is referred to.
Patent GB-569050-A (GB)
Title: A method for precipitation or separation of dispersed substances
IPC: C02F1/52
Filed: 1943-04-08
Abstract: 569,050. Water purification. SCHONFELDT, N. April 8, 1943, No. 5632. Convention date, April 29, 1942. [Class 46] [Also in Group III] Waste water is purified by added milk, for example, common cow milk, thereto, in order to precipitate or separate dispersed substances. The volume of milk used may be less than 0.1 per cent of the liquid treated. Specification 471,554, [Group III], is'referred to.
Patent GB-1468232-A (GB)
Title: Copy sheets
IPC: B41M5/124
Filed: 1975-02-12
Abstract: 1468232 Record sheet EUREKA MARKETING SYSTEMS Ltd 12 Feb 1975 [7 Feb 1974] 5637/74 Heading D2B [Also in Division G2] A pressure-sensitive record sheet comprises a sheet coated with a pigmented layer and an opaque masking layer over the pigmented layer, the masking layer having been formed by applying a solution containing a cellulose compound in a solvent mixture comprising a low boiling point compatible organic solvent and a high boiling point non-compatible solvent, which solvents are mutually compatible, and then evaporating the solution to dryness so as to precipitate the cellulose compound. The cellulose compound may be a cellulose ether and the solvent mixture may comprise methanol and water. A resin such as polyvinyl pyrrolidine may be included in the formulation from which the opaque layer is derived.
Patent GB-513055-A (GB)
Title: Improvements in regenerative coke ovens
IPC: C10B21/10
Filed: 1938-02-23
Abstract: 513,055. Coke ovens. OTTO, C. Feb. 23, 1938, No. 5733. [Class 51 (ii)] In an underfired vertically-flued regenerative coke oven having in each heating-wall flue groups, each with one or more upflow and downflow flues, the ducts for supplying rich gas to the heating-flues are so situated that, at such times as the ducts are in use for the supply of gas, they are flanked by regenerators which are also supplying combustion media to the heating-flues. In the twin-flued oven, shown, which is adapted for firing alternatively by rich and lean gas, there is a pair of regenerator chambers 3, 4 beneath each oven 7 and each of these chambers is connected with alternate heating-flues 2 in both of the heating- walls of the oven situated above them, the remainder of the flues being connected to the chambers beneath the adjacent ovens. The rich gas ducts 15 formed in walls 18 between the chambers 3, 4 are connected to the flues by the inclined ducts 16, and these ducts may be formed of tubular stones such as 19a or 19b, Fig. 3, with expansion gaps between their abutting ends and between their outer faces and the surrounding brickwork. The gas passage in the stone 19a may be widened to allow for its partial reduction by relative movement between the stones. Where there are three or four chambers beneath each oven, the inner one or two for preheating gas and the outer ones . for air, the rich gas ducts are formed in the walls between the gas and air chambers. Both rich and lean gas may be supplied through the same pipe 22 which is in communication with the ducts 15 and the gas regenerators 3, and the reversing-valves which are situated in the oven side of the pipes 22 may be coupled for simultaneous operation. The inlet openings for the supply of air for decarbonizing the gas passages are on the oven side of the flow regulating valves or devices.
Patent GB-1010400-A (GB)
Title: The production of semi-conductor components
IPC: H01L21/24
Filed: 1964-02-11
Abstract: 1,010,400. Semi-conductor devices. SIEMENS - SCHUCKERTWERKE A.G. Feb. 11, 1964 [March 13, 1963], No.5759/64. Heading H1K. When a semi-conductor crystal 2, Fig. 3, has alloyed to it a metal foil 3a consisting of or containing a doping element which, as a result of the alloying, forms a PN junction 6 in the crystal, the junction tends to have sharp corners, as indicated by the arrow, which may cause breakdown of a rectifying junction at comparatively low reverse voltages. The invention provides for such shaping of the foil that the PN junction formed will not have the above defect. The foil 13, Fig. 4, tapers from its central region to an edge not more than 5 Á thick. This foil is laid on the crystal 12 and alloyed thereto by heating to a temperature above the foil-crystal eutectic, e.g. by the method of Specification 840,241. The crystal may be of P-type silicon or germanium and the foil of antimony-doped gold or of pure aluminium so that during alloying it produces the N region 15 of Fig. 5 and also serves as an electrode 13a therefor. The diode of Fig. 5 is completed by conventional ohmic electrode 14a, but the invention is also applicable to transistors and to four-layer semi-conductor thyratrons.
Patent GB-272858-A (GB)
Title: Method for indicating the exhaustion of substances used for cleaning gases
IPC: C10K1/32
Filed: 1927-03-01
Abstract: 272,858. Deutsche Gasgluhlicht Auer- Ges. June 17, 1926, [Convention date]. Materials and compositions for purifying.-To indicate when purifying material is spent, substances which will react with the impurities and form an easily discernible substance when the purifier becomes inactive are added to the mass. Traces of hydrocyanic acid can be indicated by the characteristic odour obtained by adding nicotine. For catalytic filters which become inactive when moisture is present, the addition of carbide results in the generation of acetylene as a signal. Specification 272,855 is referred to.
Patent GB-1076693-A (GB)
Title: Improved toe-pieces for shoes
Inventor: ALLEN BARRIE ALISTAIR JAMES
IPC: A43C13/02
Filed: 1963-02-13
Abstract: 1,076,693. Toe pieces for shoes. HIDE & HIDES Ltd. Feb. 13, 1964 [Feb. 13, 1963], No. 5783/63. Heading A3B. A moulded toe piece 1 to be stuck to the toe portion of a shoe sole and shaped and dimensioned to fit the toe portion only, has a locally thickened leading portion 7 extending across a major portion of the t.p., and chamfered margins 6. The toe piece is laterally convex at the thickened portion 7, and laterally concave at the immediately rearward portion 8, and has longitudinal ribs of varying depth. The sticking surface may be roughened.
Patent GB-932744-A (GB)
Title: Improvements in furnaces for the combustion of solid fuels
IPC: F23J1/00
Filed: 1961-02-16
Abstract: 932,744. Air supply for combustion; solid fuel furnaces. H. VORKAUF. Feb. 16, 1961 [March 2, 1960; March 17, 1960], No. 5790/61 Class 51 (1). In a solid fuel fired furnace, a continuously moving layer or column of fuel is burnt to form gases which pass to an adjacent combustion chamber, and air supply spaces from which air is fed to the fuel at a number of spaced points along the side of the fuel column from which gases are evolved, are at least partly defined by means to support the fuel column or separate it from the combustion chamber. In one embodiment, Fig. 1, fuel columns 2 are separated from the combustion chamber 6 by finned water tubes 4 having bent-out parts 8, forming air supply spaces sealed from the combustion chamber by plates 10. The lower ends of the fuel columns are supported on grate 5<SP>1</SP> formed by extension of water tubes lining the outer wall of the furnace, and ash removing rollers 11 are arranged at the bottom of the furnace. The rollers may be replaced by pivoted sectors each operating between the tubes of the grate supporting one fuel column. Additional air may be supplied through the lower part of the outer furnace wall. In the embodiment of Fig. 3, the fuel layer is supported by an inclined grate 15, which may be water cooled. Air supply spaces 17 are separated from the combustion chamber 16 by plates 18, which may be supported by water tubes 21 and headers 19, 20. The headers 19, 20 enable the depth of the fuel bed to be regulated. Instead of individual headers for each air supply space, continuous tubes may extend over the whole upper surface of the fuel, with bent-out parts forming the air supply spaces. Guide plates supported by water tubes may form air supply spaces above a travelling grate, Fig. 4 (not shown). In another embodiment, Fig. 6, the fuel column 26, supported on a water tube grate 30 with ash clearing sectors 46 is separated from the combustion space 36 by a number of inclined supporting elements 31 each forming an air supply box. The air supply boxes 31 may be water-jacketed. Several fuel columns may be arranged alternately with combustion spaces, and the combustion spaces may be connected over the top of a side wall with a flue containing water heating spaces, Fig. 5 (not shown).
Patent GB-239165-A (GB)
Title: Bearing device for motors with high-speed vertical shafts
IPC: F16C23/04
Filed: 1925-03-03
Abstract: 239,165. Maschinenfabrik Oerlikon, Aug. 28, 1924, [Convention date]. Self -aligning bearings; spring supports. -A motor having a high speed vertical shaft is suspended from a fixed support 6 by a ball-and-socket bearing 4 placed between the driven object 3 and the motor casing 1, the motor shaft being supported by a thrust bearing at the foot of the motor casing and guided by a journal bearing above the ball- and-socket bearing 4. The ball of the ball- and-socket bearing may be secured to the motor casing so that the height of the latter may be adjusted. Oscillations of the motor are damped by flat springs 7 or by an elastic plate in the form of a ring or star or the like. Alternatively, spiral springs may be placed between the motor casing 1 and the support 6. The resilient motor supporting arrangement may be adjustable.