baber/WOPTO huggingface dataset:
Patent GB-425025-A (GB)
Title: Improvements in and relating to electric converting apparatus
IPC: H02H7/127
Filed: 1934-11-26
Abstract: 425,025. Converting. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. Nov. 26, 1934, No. 33940. Convention date, Nov. 25, 1933. [Class 38 (ii)] Relates to an arrangement for protection against back ignition in a converting arrangement. The valves 14-16 are each provided with a conductive member 18, which may be the casing in a metal cased rectifier, which is connected to the cathode through a rectifier 25 and transformer 28. Under normal operation the member 18 is positive with respect to the cathode, but no current flows due to the rectifier 25. On the occurrence of a back-arc or incipient back-arc, the potential of this member reverses and a current impulse flows through the transformer winding. The transformer secondaries are connected in parallel through resistances 31 and to the control grid of a valve 32 which controls the saturation of the grid transformers 21-23. Under normal conditions this valve is nonconductive, but when an impulse is applied to its grid from any of the transformers 28-30 becomes conductive and renders the control transformers inoperative by saturation so that the negative bias 20 becomes effective to block the valves 14-16. Since the valve 32 is vapour filled the main valves remain blocked until the switch 36 is opened. The grid transformers are of the self-saturating type which give control potentials of peaked waveform.
Patent GB-1509100-A (GB)
Title: Metallic catalyst support
IPC: B01J23/89
Filed: 1976-08-16
Abstract: 1509100 Catalyst support E C BETZ 16 Aug 1976 [2 Sept 1975] 34069/76 Heading B1F A metallic catalyst support has the shape of a Lessing ring which has perforations, e.g. as shown in Figs. 1 and 2 and may be made from a ribbon formed of an alloy of nickel, chromium and iron, aluminium, chromium and iron or chromium, silicon or iron. The support may be coated with platinum and or palladium, and a bed of such coated supports may be used to convert ethylene or naphtha based compounds in waste gas streams to carbon dioxide and water.
Patent GB-1020342-A (GB)
Title: Improvements in or relating to amplifiers
IPC: H03F3/387
Filed: 1962-09-05
Abstract: 1,020,342. Transistor amplifying circuits. BAILEY METER CO. Sept. 5, 1962 [Sept. 6, 1961], No. 34090/62. Heading H3T. In a D.C. amplifier the signal is first modulated on to a carrier which is amplified and demodulated and is then further amplified in a direct-coupled amplifier. Modulation occurs in a modulator 14 comprising series resistive arms 60, 62 and shunt diodes 70, 72 which are driven in antiphase with the carrier frequency, comprising a rectangular waveform from oscillator 12. The following amplifier 16 comprises an emitter-follower input stage 90 direct-coupled to three cascaded direct-coupled earthedemitter stages 92, 94, 96, the input and output being derived over blocking capacitors 86, 155 respectively. The emitter follower 90 derives base bias from a resistive feed-back network 98, 104, 106, 102, the latter resistor being returned to resistor 116 in the emitter circuit of the second stage 92 to provide overall D.C. feedback; the input impedance is increased by means of A.C. feed-back over capacitors 108, 118. The final stages 94, 96 are also provided with a stabilizing negative feed-back bias network comprising resistors 136, 138, 112. The modulated carrier is demodulated in a synchronous demodulator 18 comprising series resistor 160 and shunt diodes 142, 144 which are driven in antiphase with the carrier frequency also from oscillator 12. The demodulated signal is amplified in a direct-coupled amplifier 20 comprising transistors 166, 168, the final output being taken from the collector of transistor 168. The emitter circuit bias of this transistor is derived from resistor 176 and diode 178 and an overall stabilizing D.C. negative feed-back is applied over resistor 180; there is in addition A.C. negative feed-back over capacitor 188. The oscillator 12 comprises a pair of transistors 38, 40 operating in push-pull, their base and collector circuits being back-coupled by means of windings 28, 30, 32 on a transformer with a saturable core. The transformer also carries windings 34, 36 feeding the modulator and demodulator respectively, and a further winding 37, the output of which is rectified by bridge rectifier 50 and smoothed by capacitor 58, being used as H.T. supply for the amplifiers 16, 20.
Patent GB-343125-A (GB)
Title: Improvements in or relating to the manufacture of phosphatic manures
IPC: C05B17/00
Filed: 1929-11-08
Abstract: A colloidal sulphur solution comprises a mixture of water and sulphur previously made wettable e.g. by means of a 5 per cent solution of sodium nitrate, by using sulphuric acid in the proportion of 5 per cent, by treatment with water and intense stirring, or by the action of an electric current.ALSO:A fertilizer is manufactured by incorporating finely powdered tricalcium phosphate into a colloidal sulphur solution to obtain a finely powdered or granular product. The colloidal sulphur solution comprises a mixture of water and sulphur previously made wettable e.g. by means of a 5 per cent solution of sodium nitrate, by using sulphuric acid in the proportion of 5 per cent, by treatment with water and intense stirring or by the action of an electric current.
Patent GB-807449-A (GB)
Title: An adjustment device for weighing scales
IPC: G01G1/00
Filed: 1954-11-25
Abstract: 807,449. Weighing apparatus. BERKEL AUTO SCALE CO. Ltd., (Maatschippij van Berkel's Patent N. V.). Nov. 25, 1955 [Nov. 25, 1954], No. 34160/54. Class 143 A weighing scale of the kind having means mounted for load responsive pivotal movement against the action of loadcounterbal- - ancing means, has an adjustment device comprising spring means so connected to the pivotal means that during said pivotal movement from the half load position of the pivotal means, the spring tension varies in accordance with the second power of angular measure of the pivotal movement, and the power arm of the movement exerted by the spring means on the pivotal means also varies, so that third power errors are counteracted, by third power corrective influences during the weighing operation. Pendulum scales. As shown in Fig. 1a hook members 20, 21 rigidly secured to the sectors of a pair of fixed axis pendulum assemblies (not shown) engage plates 22, 23 attached to springs 24, 25, the effective lengths of which are adjustable by means of a screw actuated slide 28. In a modification (Fig. 2, not shown) a similar spring device is attached to the ends of a pair of arms adjustably secured to a pair of rolling sector type pendulum assemblies. As shown in Fig. 4 a resilient wire 316 provided with knife edge bearing blocks 314, 315 extends between a knife edge 313 on pendulum assembly 306 and a knife edge 312 on an arm 309 which is adjustably secured to pendulum assembly 305. In Fig. 8 a coil spring 415, the effective length of which is variable by means of an adjustable connection 414, is connected between a pair of arms 407, 408 secured to pendulums 403, 404. Spring balances. Fig. 3 illustrates a spring scale in Which a spring 222 is riveted to the scale frame at 223, is adjustable in effective length by a screw actuated slide 226 and engages, through a knife bearing 221 one end of a link 220 the other end of which is connected to the scale pan support 205 through a bracket 218 and a knife bearing 219. The Specification sets out the mathematical theory of the above arrangements. Specifications 654,104 and 794,504 [Group XXXVI] are referred to.
Patent GB-1204481-A (GB)
Title: Improvements relating to take-off director systems for aircraft
Inventor: SLEIGHT GEORGE ROBIN
IPC: G05D1/06
Filed: 1966-07-29
Abstract: 1,204,481. Aircraft instruments. ELLIOTT BROS. (LONDON) Ltd. 11 July, 1967 [29 July, 1966], No. 34263/66. Addition to 1,086,211. Heading B7W. An aircraft take-off instrument as in Specification 1.086,211 modified to produce a single composite demand signal which suffices throughout the take-off manoeuvre from rotation.
Patent GB-1259710-A (GB)
Title: Oscillators
IPC: H03C3/00
Filed: 1969-07-08
Abstract: 1,259,710. Transistor oscillators; pulse modulation circuits. INTERNATIONAL BUSINESS MACHINES CORP. 8 July, 1969 [12 July, 1968], No. 34265/69. Headings H3T and H4L. A pulse oscillator suitable for use in pulse frequency modulation video recording system comprises a pair of alternately conducting transistors 11, 21 having a common supply of collector emitter current (shown as an emitter supply 30), a capacitor 60 which is charged when one transistor (21) is on and discharged through the other (11) when it is conducting and a tunnel diode 41 responsive to the capacitor voltage to switch the conducting conditions of the transistors. As shown, charging is effected by a source 50, modulatable by a signal 52 to control the oscillator frequency. The tunnel diode is controlled by a transistor 42 to switch the diode to its low voltage state when the capacitor changes to one voltage and to its low voltage state when it discharges to another. The output may be fed to a bi-stable frequency divider and wave shaper.
Patent GB-173229-A (GB)
Title: Endless band for cigarette machines and process and device for making the same
IPC: D03D35/00
Filed: 1921-12-20
Abstract: 173,229. Fischer, W. [Firm of], (Assignees of Petzold, W.). Dec. 20, 1920, [Convention date]. Drawings to Specification. Endless fabrics.-An endless band for use in machines for the manufacture of continuous and filled cigarettes is woven in a needle loom and has the weft-thread loops on one side of the band interlaced by a selvedge thread from a selvedge shuttle. The last part of the band is woven by hand or otherwise. The loom for making the band is preferably provided with adjustable means for feeding a length of weft to the needle equal to double the width of the band for each shot and for tightening the weft.
Patent GB-341176-A (GB)
Title: Process and apparatus for filtering suspended sediments (sludge)
IPC: B01D35/12
Filed: 1929-11-11
Abstract: 341,176. Filters. PONTOPPIDAN, C., 48, Vejlesovej, Holte, Denmark. Nov. 11, 1929, No. 34389. [Class 46.] Sludge &c. is filtered by inserting a hollow filter body in a pressure tank containing the sludge and after a filter cake of the suspended material has been deposited on the filter body the filter body is withdrawn from the pressure tank through an opening the wall or edge of which fits like a stuffing- box around the filter body and the cake deposited thereon. A filter body comprising a perforated pipe 1, Fig. 1, covered with filter cloth is inserted in a tank 3 by means of a piston-rod 2. Sludge enters by a pipe 4 and the tank is exposed to pressure whereby liquid is expressed through the filter body and escapes through the end of the pipe. When the filter cake formed on the filter cloth is of sufficient thickness the filter body is withdrawn from the tank through the packing 5. The filter cake is scraped off as the pipe passes the scraper 6. The filter body together with the filter cake deposited thereon may be passed through another closed chamber and therein treated with heated air &c. Two pressure tanks may be placed in series, the filter body passing from one to the other. The pressure tank may have a packing at both ends and the filter body be moved to and fro through the tank. The filter body may comprise an endless member 1, Fig. 5, supported and driven by drums 13, the pressure tank 3 being fitted with packing devices at the points where the filter body enters the tank as well as where it leaves. Various forms of stuffing-box are described e.g. the stuffing-box may comprise an annular collar 7, Fig. 2, fitted on the inside with a rubber ring 8 which by means of a pipe 9 may be subjected to pressure; the collars 7 may have a number of openings 10, Fig. 3, so that the pressure in the tank itself acts on the rubber ring 8; or the stuffing-box may comprise a device somewhat resembling an iris stop.
Patent GB-605290-A (GB)
Title: Improvements connected with display stands
IPC: A47F7/08
Filed: 1945-12-19
Abstract: 605,290. Display stands. PARNALL & SONS, Ltd., and GABB. A. H. Dec. 19, 1945, No. 34407. [Class 52(iii] A display stand comprises a branching support for display brackets 5 the support 1 being mounted for angular and vertical adjustment by means of a stem 2 carried by a base 3 or other relatively fixed part of the stand. As shown the stem, of rectangular cross section, is tapered and held in vertical adjusted position by means of a grub screw 4, the branching support being mounted for angular adjustment by means of a socket in part 1a engaging a peg upstanding from the stem 2. The display brackets 5 are adjustably secured to the support 1 by distance pieces 6 and screws 7.
Patent GB-973038-A (GB)
Title: A process for purifying gas containing acetylene,ethylene and impurities obtained by thermal cracking of hydrocarbon
IPC: C07C7/00
Filed: 1962-09-11
Abstract: Acetylene-containing gases obtained from the pyrolysis of hydrocarbons are purified to remove C3 and higher unsaturated hydrocarbons by contact with an organic solvent immiscible and unreactive with sulphuric acid and the resultant solution of unsaturated hydrocarbons in the solvent is contacted with sulphuric acid to remove C3 and higher materials and the solvent recycled to the acetylene purification step.  The pyrolysis gas is first washed with heavy oil and carbon dioxide may be removed with ethanolamine and water by freeze drying or by washing with methanol.  The gas is countercurrently contacted with the solvent, preferably under normal conditions; suitable solvents are hexane, heptane, octane, nonane, decane, cyclohexane, decahydronaphthalene, petroleum naphtha freed of unsaturates, kerosene, nitromethane, nitroethane, nitropropane, ethylene dichloride, ethylidene dichloride, trichloroethane, carbon tetrachloride, dihexyl ether, dioctyl ether, and carbon disulphide. Thereafter the solvent is purified for reuse, without removing dissolved acetylene, by countercurrent contact with 40-95% sulphuric acid which may contain a dehydrating agent, e.g. sodium sulphate or phosphorus pentoxide, a reaction accelerator, e.g. aluminium sulphate or potassium bichromate, or a specific gravity increasing agent, e.g. sodium or potassium sulphate.
Patent GB-1361326-A (GB)
Title: Hydrogen oxygen combiner
IPC: G21D3/08
Filed: 1972-07-25
Abstract: 1361326 Apparatus for preparing water WESTINGHOUSE ELECTRIC CORP 25 July 1972 [9 Sept 1971] 34663/72 Heading C1A [Also in Division G6] Apparatus for combining hydrogen and oxygen, particularly in a nuclear reactor installation, comprises a housing having inlet and outlet openings and containing an electrical heater element over which gas is intended to pass during its passage from the inlet to the outlet openings. In one embodiment (Fig. 3) the openings are afforded by respective sets of louvres 17, 18. The heater element comprises a stack of units 19 disposed in an inner shroud 20 within the housing 16 so as to define a preheating section 31 and a combination section 20a. A fan 25a improves gas circulation. A partition 23 separates the lower chamber in the housing from an upper, cooling chamber 28. In another embodiment (Fig. 5) a vertical, sheathed heater element 32 is surrounded by a shroud 31 so as to define a preheating section 30a. In certain cases, the combiner is water cooled.
Patent GB-498270-A (GB)
Title: Improvement in expansible pulleys
IPC: F16H55/54
Filed: 1937-12-15
Abstract: 498,270. Expanding pulleys. DICKERSON, H. W. Dec. 15, 1937, No. 34702. Convention date, Dec. 18, 1936. [Class 80 (ii)] Pulleys with expanding segments adapted to carry single or multiple V-belts, for use in the drives of cigarette-making machines, &c., have the segments 18 provided on adjacent sides with non-radial faces 55 so as to reduce the scraping effects on the belt sides as it leaves the pulley. The segments slide on splines on the coned faces of discs 11, 12 which are simultaneously forced together, to raise the segments 18 against the action of encircling springs 23, by differential screw means. A screw thread 41 and another 42 of half the pitch are formed on a shaft 40 and engage respectively with nuts 43, 44 splined together and prevented from rotation. On rotation of the shaft 40, it actuates the disc 11 through a spider 25 and bolts 29, while the disc 12 is actuated by the nut 43 through a spider 35.
Patent GB-1260672-A (GB)
Title: Improvements relating to targets and inertia switch type transducers in combination therewith
Inventor: KNIGHT LINDSAY CHARLES
IPC: F41J1/10
Filed: 1968-02-08
Abstract: 1,260,672. Clamps. AUSTRALASIAN TRAINING AIDS PTY. Ltd. 5 Feb., 1969 [8 Feb., 1968], No. 34777/71. Divided out of 1,260,671. Heading E2B. [Also in Divisions F3 and F4] The subject matter of the Specification is as that in Specification 1,260,671, but the claims relate to a target and the target in combination with a transducer.
Patent GB-516756-A (GB)
Title: Improvements in regulators for dynamo-electric machines
IPC: H02P9/18
Filed: 1938-11-29
Abstract: 516,756. Automatic control systems and regulators. MASCHINENFABRIK OERLIKON. Nov. 29, 1938, Nos. 34812 and 34813. Convention dates, Dec. 17, 1937 and Oct. 19, 1938. [Class 38 (iv)] Voltage &c.-In a regulator of voltage, or other characteristic of a dynamo-electric machine, which comprises a resilient restoring and damping system having contacts engaged when the rate of change of the magnitude controlled is excessive, whereby over-regulation is produced, the contacts are arranged on the regulating system and on the restoring device respectively so that the relative positions of those alone determines contact making and the overregulation is terminated before a full correction is attained. As shown in Fig. 2 the regulating system comprising the shaft 1, actuated by a measuring system, and the rolling sector 4 controlling the exciter field resistance 15 is damped and restrained by an eddy current disc 7 geared to a segment 5 loose on the shaft 1 and coupled to it through springs 9 and an adjustable pin 20 in an arm 10 fixed to the shaft. The segment 5 and the arm 10 carry contacts 12, 13 and 14 whereby relay coils 17, 18 arc selectively energized according to the sense of a rapid change in voltage to excite in appropriate sense an auxiliary field winding 32 on the exciter, of the controlled alternator 21. An arrangement is described wherein two resistances in series with the resistance 15 are respectively cut out and in by relays selectively controlled by the contacts 12, 13, 14. The Specification as open to inspection under Sect. 91 describes a relay responsive to alternator voltages which on fall or rise of say 5 per cent. in voltage short circuits or cut-in resistances in the exciting circuit and modifies the resistance of its energizing circuit so that it is restored before full correction of alternator voltage. A plurality of such relays with different response values and controlled resistances might be employed. The arrangement according to Fig. 2 might be modified by placing the winding 32 on the alternator field by exciting it directly from the exciter. This subjectmatter does not appear in the Specification as accepted.
Patent GB-947988-A (GB)
Title: A method of producing porous vitreous mouldings
IPC: C22C32/00
Filed: 1962-09-12
Abstract: 947,988. Porous glass. WASAG-CHEMIE A.G. Sept. 12, 1962 [May 12, 1962], No. 34885/62. Addition to 904,509. Heading C1M. The method of producing a porous glass moulding according to the parent Specification is modified by the addition to the intermediate particle size mixture of metal in a size-reduced form prior to the heating step. Steel wool or granular aluminium are the preferred metals. The metal may be added to only a part of the mixture so as to be present in at least one face of the moulding. Instead of being mixed in with the particles of glass, a layer of steel chips may be scattered into a mould and the particle mixture added, to give a layer of metal chips firmly embedded in the porous glass.
Patent GB-1212630-A (GB)
Title: Torque transmitting connection and method of making the same
Inventor: LAING JAMES
IPC: F16D67/00
Filed: 1969-07-10
Abstract: 1,212,630. Making shaft couplings. BORGWARNER Ltd. 10 July, 1969, No. 34900/69. Heading B3A. [Also in Division F2] A coupling is formed from two cup-shaped sheet metal members, the peripheries of which are provided with inter-engaging axial toothlike indentations, formed for example by a combined drawing and shearing operation, the indentations providing a spline-like connection As applied to the planet carriers of a changespeed vehicle transmission, Fig. 1 (not shown), one of them consists of an outer cup-shaped member 28 and a sheet metal carrier member 26 welded to the annulus 24. A spacer 38 and outer support plate 40 carry the planet pins 41. Axial edge indentations 32 engage similar indentations 46 on a second cup-shaped member 48 formed with holes 60 for receiving the planet  pins of a second gear assembly. Peripheral openings 36 may also be provided in member 28 for engagement with the locking pawl of a parking brake, Fig. 6 (not shown).
Patent GB-1036708-A (GB)
Title: Photographic camera supports
IPC: F16M11/04
Filed: 1964-08-26
Abstract: 1,036,708. Stand heads. MEOPTA, NARODNI PODNIK. Aug. 26, 1964 [Aug. 27, 1963], No. 34902/64. Heading A4H. A stand head for holding the guide rod 1 of a camera having a carrier of photosensitive material and a lens carrier traversable independently along the guide rod comprises a bed 2 having a clamp 4 with a pivoted lever of which one arm 41 clamps the rod 1 under the influence of a screw 3 acting in the other arm 42;
Patent GB-1525702-A (GB)
Title: Electrostatographic developer compositions
IPC: G03G9/113
Filed: 1975-08-22
Abstract: 1525702 Electrostatographic developers XEROX CORP 22 Aug 1975 [26 Aug 1974 (2)] 34944/75 Heading G2C An electrostatographic developer comprises carrier and toner particles at least one of which contains a styrene/alkyl (meth)=acrylate copolymer in which some of the pendent ester groups have been aminolyzed to modify the triboelectric properties. Preferably the copolymer contains up to 25 per cent of units of the Formula wherein X is NH2, OH or H. These copolymers may be used to coat steel beads and may also be cross-tested with tolylene diisocyanate after coating and are then used as coated carriers. Alternatively, the copolymer of the Formula may be mixed with styrene/n butyl methacrylate copolymer, the toner as a toner with a steel or nickel carrier. When the carrier contains the desired copolymer, the toner may be a natural resin, polystyrene, acrylic resins, polyalkylenes, polyesters, epoxy resins or phenolformaldehyde resins. When the toner contains the desired copolymer, it may be admixed with a dye or carbon black and may be used with a magnetic or non-magnetic carrier.