baber/WOPTO huggingface dataset:
Patent GB-1111021-A (GB)
Title: Improvements in frequency converter systems
IPC: H02M5/48
Filed: 1966-07-19
Abstract: 1,111,021. Semi-conductor circuits. GENERAL ELECTRIC CO. 19 July, 1966 [13 Sept. 1965], No. 32358/66. Heading H3T. [Also in Divisions G3 and H2] A cyclo-converter having controlled rectifiers 18, 20, 22, Fig. 1, supplies a polyphase load 56 from a polyphase source 4 which may be a variable frequency generator. The controlled rectifiers are driven by " modulators " 12, 14, 16 which are arranged together with the blanking circuit 24 so that no firing signal is applied to any controlled rectifier when it is reverse biased. A reference oscillator 32 of fixed or variable frequency determines the output frequency, which is always less than the input frequency. The control circuitry for one controlled rectifier is shown in more detail in Fig. 3. Transformer 58 has its primary connected to the converter input. The voltage induced in winding I.P. of secondary 62 switches on transistor 98 when controlled rectifier AIP is forward biased to energize the modulator circuit 12, this includes pulse transformer 72, 68, 74 and silicon controlled switch 66 which is fired by a voltage 90 degrees displaced to the voltage in winding I.P. of secondary 62 derived from winding I.P. of the phase shifting secondary 64 combined with the reference voltage received at 86 and a bias voltage at 95. The reference oscillator and current limiting circuit are shown in Fig. 4. A signal proportional to the current to the converter is fed to the cathode-gate of the silicon controlled switch 116. The anode is connected to the output of the reference oscillator 134. If the converter current becomes excessive the silicon controlled switch fires and short-circuits the oscillator output for a few cycles until capacitor 132 becomes charged. After this the cathode-gate, anode-gate and anode act as an NPN transistor and convert the voltage regulator unit 140 to current regulating operations. In normal operation signals from the reference oscillator 134 and phase-splitter 136 are clipped at 138 to the magnitudes required for each phase by the voltage regulators which compare the output voltage received through lines 34, 36, 38 with the reference voltage across Zener diode 166. The clipped signals are fed to the modulators (Fig. 1) (through filters 142 if a sine wave output is required).
Patent GB-631116-A (GB)
Title: Improvements in or relating to boring bars
IPC: B23B29/034
Filed: 1946-11-01
Abstract: 631,116. Boring-bars. ZBROJOVKA BRNO, NARODNI PODNIK. Nov. 1, 1946, No. 32503. Convention date, Nov. 4, 1945. [Class 83 (iii)] Relates to a boring-bar in which the cylindrical arbor 2 of an interchangeable tool-holder is mounted in a transverse bore 4 of the bar and contains the means for setting the tool 5 in the holder head 3. According to the invention, the head 3 is partly housed in a groove 6 in the bar in such a manner that it does not completely fill the groove and is guided therein by at least two lateral surfaces, the holder being clamped in position by an element which has a part 11 arranged in the free space of the groove for engagement with the holder head. The clamping means takes the form of a rotatable screw 7, the head 9 of which is arranged in the free space of the groove and has a catch 11 co-operating with a catch 12 on the holder head. The catches may be in the form of claws or the catch 11 may engage in a recess in the holder head. Further, one or both of the catch-engaging surfaces may be enclosed.
Patent GB-485873-A (GB)
Title: Improvements in or relating to hats
IPC: A42C5/04
Filed: 1936-11-30
Abstract: 485,873. Hats. FEIGE, R. Nov. 30, 1936, No. 32742. [A Specification was laid open to inspection under Sect. 91 of the Acts, June 14, 1937.] [Class 63] A helmet or other hat has large unobstructed ventilating openings at the junction of the crown and brim. Entering air either plays directly on the forehead or passes between crown and an inner cap to cause a suction through an opening in the crown which draws air past the forehead. The crown 1 may be spaced from the brim by metal straps 6, the sweat-band 4 being also spaced from the brim by blocks 5 of cork. In a modification, the straps 6 are substituted by hinged links, so that the ventilating space may be adjusted.. In another modification, the ventilation openings are at the front and rear only. The crown 10 may be supported from an inner cap by spacing diaphragms 11 radiating from an opening controlled by an iris diaphragm adjusted by a button 17. The flow of air through the contracting and expanding passages causes suction at the opening and draws air past the forehead of the wearer. In another modification, the front of the crown of the helmet is hinged at 1 so that it can be raised or lowered, bellows or sliding blades being provided at the sides of the hinged portion. A perforated metal cylinder 21 may surround the suction opening. The part of the sweat-band. at the forehead may be removed.
Patent GB-369983-A (GB)
Title: Improvements in wireless receiving sets
IPC: H03D11/02
Filed: 1930-11-01
Abstract: 369,983. Valve amplifying circuits. DEAN, C. L. P., 73, Drayton Gardens, West Drayton, Middlesex, and BEGBIE, C. W. H., 5, Easter Terrace, Brighton. Nov. 1, 1930, No. 32944. [Class 40 (v).] In a super-regenerative wireless receiving circuit of the type described in Specification 182,135, [Class 40 (v), Wireless signalling &c.], variable or fixed resistances are inserted in series with and on the high frequency side of the quenching unit in the input and/or the plate circuit of the valve, in order to stabilize the circuit. By this means a receiver embodying the circuit can be made small enough to be carried in the pocket. The Figure shows the usual Armstrong circuit with resistances 16, 14 in series with the quenching units 10, 11 ; 12, 13, which may be constructed as plug-in units. The circuit may be adapted for use with a pentode valve as in the drawing accompanying the Provisional Specification (not shown). Suitable values of inductance, resistance and capacity for the various components are given.
Patent GB-630697-A (GB)
Title: Improvements in electric discharge tubes with transverse deflection
IPC: H01J21/14
Filed: 1946-11-06
Abstract: 630,697. Electron beam apparatus. AKTIEBOLAGET SVENSKA ELECTRONROR. Nov. 6, 1946, No. 33000. Convention date, July 7, 1945. [Class 39 (i)] A beam deflection valve comprises a cathode 1, control grid 2, accelerating electrode 3, concentrating electrodes 4, 16, deflecting electrodes 5, 15, auxiliary electrodes 6, 14, anodes 7, 13, all enclosed within the reflecting electrode 12. The latter may be as shown in the Figure or may comprise a concave portion with a rod placed close to it in the plane of symmetry. Secondary emitting electrodes may be placed in front of the anodes. Electrodes 6 and 14 may be positive with respect to the other electrodes to increase the deflection.
Patent GB-341584-A (GB)
Title: Improvements in and relating to the purification of hydrogen, hydrogen containing gases, air and other gases
IPC: C01B3/52
Filed: 1929-10-31
Abstract: Sulphur compounds such as carbon bisulphide and carbon oxysulphide, are removed from industrial gases such as coal gas and hydrogen, by passing the gas in contact with piperidine or its homologues.  The piperidine may be dissolved or suspended in water, pyridine or in organic solvents such as hydrocarbon oils, alcohols, ketones or it may be used together with ammonia and copper salts in the absorption of carbon monoxide from gases, or with gas oil in the recovery of benzol, or it may be used in the form of vapour.  Piperidine compounds such as the carbonate may be used either in the dry state or in suspension or solution. Piperidine and sulphur compounds may be recovered from the complex compounds obtained in the purification by treating the latter in water to the action of carbon dioxide under pressure when piperidine carbonate is formed and the sulphur compound liberated; or the compounds may be decomposed by acid.  The treatment of air is mentioned in the second Provisional Specification. Specifications 203,218 and 309,300 [both in Class 1 (i), Chemical processes &c.], are referred to.ALSO:Piperidine and its homologues are used to remove sulphur compounds such as carbon bisulphide, carbon oxysulphide, from industrial gases such as coal gas and hydrogen.  The piperidine may be dissolved or suspended in water, pyridine or in organic solvents such as hydrocarbon oils, alcohols, ketones, or it may be used together with ammonia and copper salts in the absorption of carbon monoxide from gases, or with gas oil in the recovery of benzol, or it may be used in the form of vapour. Piperidine compounds such as the carbonate may be used either in the dry state or in suspension or solution.  Piperidine and sulphur compounds may be recovered from the complex compounds obtained in the purification by treating the latter in water to the action of carbon dioxide under pressure when piperidine carbonate is formed and the sulphur compound liberated; or the compoounds may be decomposed by acid.  The treatment of air is mentioned in the second Provisional Specification.  Specifications 203,218 and 309,300, [both in Class 1 (i), Chemical processes &c.], are referred to.
Patent GB-173221-A (GB)
Title: Improvements in ignition devices for internal combustion engines
IPC: F23Q7/00
Filed: 1921-12-09
Abstract: 173,221. Tartrais, E. H. Dec. 22, 1920, [Convention date]. Cylinders receiving liquid fuel. -In an engine receiving heavy liquid fuel, ignition is effected at starting by an incandescent filament 11, which is mounted within a pocket so as to receive directly the jet of liquid fuel, but is protected from the whirling gases. The piston 2 carries an extension 3 such that, during the latter part of the compression stroke the air within the space 34 is violently expelled through the annular space between the extension 3 and cylinder wall 4. This produces a whirling movement within the annular chamber 35, promoting the vaporization of the fuel injected through the atomizing-device 8. During normal running the filament is not used for igniting, and the current thereto mav be cut off conjointly with the closing of the relief cock 20. The disconnection may consist in opening a switch or actuating the clutch through which a geuerator is driven. The filament may be made from a platinum-iridium alloy or the like, and is secured to tapered plugs 12 which enter socketa in the casing 10 of the plug and in the head 37 of the central conductor 13. A spring 18 serves to keep gastight the joints between the members of the plug and allows for thermal expansions. The current lead may engage directly with the split end of the terminal 19, or be clamped by a nut which engages a bridle-piece fitting the split terminal and retained by a gland within the casing of the plug. By this means any twist due to the lead is not transmitted to the filament 11.
Patent GB-1066138-A (GB)
Title: Electromagnetic stirrer
Inventor: KARLSSON GOSTA
IPC: F27D27/00
Filed: 1965-08-03
Abstract: In an electro-magnetic stirrer for a metallurgical furnace the ends of the polyphene stirring windings are cast into a mass with a permeability substantially the same as that of air, and consisting of a filled and a binding agent, e.g. a coarse or fines and with a polyester, asphalt or cement.  Distance pieces and cooling conduits may be cast into the mass.  The ends of the windings may be circulated by first casting a polyester round them.  A ceramic cover may be situated between the windings and the furnace.
Patent GB-1402212-A (GB)
Title: Vibratory finishing machine with reversible eccentric drive
IPC: B24B31/067
Filed: 1973-07-11
Abstract: 1402212 Vibratory finishing J F RAMPE 11 July 1973 [27 Sept 1972] 33123/73 Heading B3D [Also in Division F2] A vibratory finishing machine comprises a receptacle 12 adapted to receive finishing media and workpieces to be finished, and a drive system 14 for vibrating the receptacle at two different amplitudes, the system having a plurality of eccentric weights 54, 55, 56 and power drive means 16 operable to rotate the weights selectively in a first co-ordinated mode such that the weights have an additive drive effect for vibrating the receptacle at a first amplitude, and in at least one other co-ordinated mode such that the weights, when rotated at substantially the same speed as in the first mode, have a lesser additive drive effect for vibrating the receptacle at a lesser amplitude. The receptacle is in the form of a tub 12 supported by elastomeric spacers 25 from a supporting structure 11, the tube having a door 31 for discharging workpieces and finishing media into a shoot 32. As described, the machine has two identical drive systems 13, 14 mounted on channels on the sides of the tub, each system being supported by brackets 50, 51 from its channel and being driven by a motor 15, 16 through a flexible coupling 43, 44. The motors 15, 16 are connected to a control panel 19 for synchronous operation and control of their direction of rotation. Each motor drives, through its flexible coupling, a shaft 52 rotatably mounted in the brackets 50, 51. A central portion 63 of the shaft is enlarged and has a flat 65 to which is secured a weight 54. The end parts of the shaft having driving pins 82, 83 located in notches 78, 79 in blocks 74, 75 mounted on the shaft and secured to weights 55, 56, the notches permit the blocks to rotate 180 degrees relative to the shaft. When the shaft is rotated in one direction, the weights 55, 56 are aligned with weight 54 whereby the tub is vibrated at a maximum amplitude. When the shaft is rotated in the opposite direction, the weights 55, 56 rotate 180 degrees relative to the shaft so as to be diametrically opposite weight 54 and the tub is vibrated at a smaller amplitude but at the same frequency.
Patent GB-1242935-A (GB)
Title: Method of converting heat energy to mechanical energy on a rankine cycle
IPC: F01K25/08
Filed: 1969-07-01
Abstract: 1,242,935. Turbines; vapour engine power plant. MONSANTO CO. July 1, 1969 [July 2, 1968], No.33126/69. Headings F1Q and F1T. A closed cycle vapour power plant comprising a vapour generator, turbine and condenser uses as the working fluid an organic compound selected from cycloaliphatic, heterocyclic and fused ring compounds having an entropy change not greater than about 0À10 B.T.U. per pound per ‹R between the entropy at the maximum saturation enthalpy point on a Mollier diagram and the entropy of the saturated vapour at atmospheric pressure. Examples of such compounds are 1, 3, 5-triazine, 1, 4-diazine, furan, cyclopentane, pyridine, pyrrole, pyrazole, imidazole, cyclopentadiene, pyrrolidine, cyclopropane, caprolactone, cyclohexane, piperidine, trimethyl triazine, benzofuran, and morpholine. The compounds may include alkyl, aryl, aralkyl, alkoxy, acyloxy, nitro, nitrile, amino, hydroxy, alkenyl and aryloxy radicals as substituents. In the case of the heterocyclic compounds one or more of the hetero atoms can be nitrogen, oxygen, boron, phosphorus or silicon. The fused ring organic compound may have 2 to 6 fused rings. A mixture of compounds may be used. The compounds may be sulphur free and non-halogenated. The plant may operate on a supercritical regenerative cycle or on a saturated or super-heated binary cycle. The heat source of the plant may be waste heat, e.g. hot stack gases from industrial processes, exothermic heat from chemical reactions, natural thermal wells, and exhaust gases from gas turbines or other engines.
Patent GB-1268468-A (GB)
Title: Improvements in or relating to mine roof support arches
IPC: E21D11/18
Filed: 1970-07-08
Abstract: 1,268,468. Mine arches. BERGWERKSVERBAND G.m.b.H. 8 July, 1970 [1 Aug., 1969], No. 33141/70. Heading E1E. A mine arch support comprises a straight section 1 having curved ends 3, each of which is connected at 3 to a support prop formed by two arch-sections 2 which have the same length and radius of curvature and are interconnected by non-rigid joints 4. In a modification, see Fig. 2 (not shown), the member 1 is constituted by two portions interconnected by a non-rigid joint.
Patent GB-1145239-A (GB)
Title: Binding agent for plaster and/or mortar, and mortar mixtures produced therefrom
Inventor: JOHANSSON HARRY
IPC: C04B28/02
Filed: 1966-03-24
Abstract: 1,145,239. Cement composition. GULLHOGENS BRUK, A.B. 24 March, 1966 [25 March, 1965], No. 33148/68. Divided out of 1,144,024. Heading C1H. A binding agent for plaster or mortar comprises an hydraulic cement, from 5 to 50% wt. of a mixture of a finely divided inorganic filler and a coarser inorganic filler and 0À005- 0À3% by wt. of a water-soluble cellulose derivative, the finely divided filler having a range of particle sizes finer than the particle size distribution curve defined by the following points: 90% < 10 Á, 50% < 2 Á, 30% < 1 Á and 1% < 0À1 Á, by weight, and the coarser filler having a particle size of less than 500 Á and providing up to 95% of the weight of the mixture of inorganic fillers. The hydraulic cement may be Portland, aluminous, slag, and/or gypsum-slag cement. The fillers may be limestone, gypsum, sand, quartzite, kieselguhr, marble, dolomite, felspar, pyrophyllite, perlite, granite or gneiss. A watersoluble chlorophenol salt may also be present in amount 5-50% by wt. of the cellulose derivative. A surface-tension influencing airentraining agent may be present in amount up to 0À5% by wt. of the composition, e.g. tall oil or sulphonated or sulphated resins or fats.
Patent GB-506794-A (GB)
Title: Improvements in or relating to electrode constructions for electron discharge tubes
IPC: H01J29/34
Filed: 1937-12-01
Abstract: 506,794. Cathode-ray tubes. EHRENBERG, W., and HILL, S. Dec. 1, 1937, No. 33175. [Class 39 (i)] A focusing anode consists of a framework or mesh of fine lines 5 of a substance of high conductivity formed on the inner wall of the tube ; these may consist of liquid gold connected to bands 3, 4 also painted on the wall. The anode is connected by tungsten springs to a ring 6 forming part of the cathode gun. The fluorescent screen 8 has a gold mask 9, in contact with the mesh anode. A coating of black lacquer as described in Specification .500,119 is provided on the outside of the tube. The mesh framework may be of helical form. Specification 415,411 also is referred to.
Patent GB-914136-A (GB)
Title: Door latch construction for cooker ovens
Inventor: WARD ALBERT WALTER
IPC: E05C7/02
Filed: 1960-09-28
Abstract: 914,136. Latch fastenings. PARKINSON COWAN Ltd. Sept. 28, 1961 [Sept. 28, 1960], No. 33280/60. Class 44. A latch construction for the doors of a cooker oven having inner and outer doors comprises a handle for the outer door 2 arranged to have a pivotal movement to release the outer door and associated with the handle a manually movable member 13 which in one position allows the outer door to open alone and in another position causes an opening movement of the outer door to open also the inner door 21. As shown the handle comprises two arms 3, 4 which are joined by a handgrip 5; the arms are pivoted to a base 1 about an axis 6 and the arm 4 has an integral cam surface 7 which engages a cam surface 8 on a latch member 9 pivoted on the base 1 about a second axis 10. The latch member 9 is biased in a counter-clockwise direction as shown in Fig. 2 by a spring 11 which also urges the arm 4 in a clockwise direction. The latch member 9 co-operates with a keeper 12 secured to the frame of the oven and when the handgrip 5 is pulled to open the door the arm 4 turns about its axis and disengages the latch member 9 from the keeper 12. The manually movable member 13 is a plunger which is contained in the arm 3 and which is capped by a push button 14. The plunger and push button are biased upwardly by a spring 15. Pivoted in the base 1 on the axis 6 is a latch member 16 which is urged in a clockwise direction as shown in Fig. 3 by a spring 17, its movement in the clockwise direction being limited by the engagement of an abutment portion 18 with a surface 19 on the inside of the base 1. The latch member 16 cooperates with a keeper 20 secured to the inner door 21 of the oven. Normally when the handgrip 5 is pulled the engagement of the latch member 16 with the keeper 20 causes the inner door to open with the outer door but if the push button 14 is depressed the lower end of the plunger 13 engages a detent 22 formed on the latch member 16 so that the latch member is turned when the hand grip 5 is pulled to disengage it from the keeper 20 and only the outer door is opened.
Patent GB-1195556-A (GB)
Title: Hydrocarbon Oxidation Process
Inventor: STEIN THEODORE WOLFLIN
IPC: C07C29/52
Filed: 1967-07-20
Abstract: 1,195,556. Oxidation of hydrocarbons. HALCON INTERNATIONAL Inc. 20 July, 1967 [25 July, 1966], No. 33344/67. Heading C2C. In a process for the oxidation of cycloaliphatic and paraffin hydrocarbons with molecular oxygen in the presence of a boron compound adjuvant wherein a vapour stream containing hydrocarbon, water and orthoboric acid, metaboric acid or hydrocarbon oxidation product borate ester is produced and is cooled by indirect heat exchange to condense the condensible materials, water is added to the vapour stream prior to the condensation of the condensible materials, the water being added in an amount such that the resulting gas mixture contains water in an amount of at least 60%, preferably more than 90%, of the saturation amount, whereby decrease of the heat transfer characteristics of the condenser is overcome. In an example, cyclohexane is oxidized to cyclohexanol, chiefly, and cyclohexanone.
Patent GB-690329-A (GB)
Title: Improvements in and connected with refractory bricks and the moulding thereof
IPC: B28B23/00
Filed: 1948-12-29
Abstract: The brick moulding apparatus described for producing a basic refractory brick having lateral faces covered by oxidizable metallic spacer devices which are applied at the time of forming the brick is substantially the same as that shown and described in Specification 546,220 which is referred to.  Specification 690,356 also is referred to.
Patent GB-758430-A (GB)
Title: Electroplating apparatus
IPC: C25D17/06
Filed: 1954-11-18
Abstract: 758,430. Electroplating. MACLEAN, W. D. Nov. 18, 1954, No. 33442/54. Class 41. An electroplating apparatus comprises a tank 1 having a pot 3 for electrolyte mounted at each end, and a removable rack 9 with means for mounting workpieces 22 with a conductor 33 fixed at each end of the rack, each conductor 33 being received in the appropriate pot 3 when the rack 9 is in operative position in the tank 1. Each conductor 33 is suspended from a portion 32 of an electrode bar 14 bolted at 12 through insulation 13 to a channel member 10 which, with an interconnecting beam 11 and the opposite member 10, forms the rack 9. The bolts 12 further secure plates 15, 16 to the member 10, rods 23 threaded in the plate 15 and bolts 30 secured to the plate 16 receiving hooks 27 which hook into the workpieces 22. The side edges of the plate 16 carrying the bolts 30 are notched to form resilient lateral fingers, and the rods 23 are adjustable in the plate 15. The pots 3 are disposed in bus-bars 5 on the end walls 6 of the tank 1. Anodes 2 lie along each side of the tank 1, and additional anodes 37 may be suspended from a bar 35 attached to the beam 11.