baber/WOPTO huggingface dataset:
Patent GB-851890-A (GB)
Title: An arrangement for controlling multimotor drives
IPC: H02P5/50
Filed: 1957-03-15
Abstract: 851,890. Automatic speed control systems. KRIZIK-KARLIN VYVOJOVY ZAVOD NARODNI PODNIK, TOMANEK, E., and JANECKA, Z. March 15, 1957, No. 8620/57. Class 38 (4). In a system for maintaining a predetermined speed relationship between motors I, II, III in a multi-motor drive, a generator G driven by motor I produces a three-phase output Uv, fv which is applied to create rotating fields in the stators of tacho-dynamos TD1, TD2, driven by motors II, III, whereby signals of amplitude proportional to the speed errors are induced in the armatures of tacho-dynamos TD1, TD2, commutators on the armatures resulting in control voltages having the same frequency fv as the output from G. An auxiliary A.C. component adjustable by potentiometer P1, P2, is introduced into each control circuit by transformers T1, T2, the two voltages in each circuit actuating a controller R1, R2. Arrangements for interconnecting the control circuits and thus maintaining the speed ratios are provided. The motor armatures and fields are fed from sources Uk, Ub, and a source Up provides a reference voltage.
Patent GB-268783-A (GB)
Title: Process of treating after spinning artificial silk made from viscose
IPC: D01F11/02
Filed: 1927-03-29
Abstract: 268,783. Deutsche, Zellstoff-Textilwerke Ges., (Assignees of Spinnstofffabric Zehlendorf Ges.). March 30, 1926, [Convention date]. Apparatus for making filaments; cellulose - xanthates, processes for making filaments from.- In the manufacture of viscose silk, transference - of the material from the original collecting spools is avoided by employing a foraminated spool made from a material which resists the action of the desulphurizing-mechanism, and by subjecting the silk while on this spool to the several baths required for the purpose of removing acid, bleaching, desulphurizing, soaping, &c., the baths being caused to flow through the material. Suitable materials for the spools are stainless steel and ceramic materials. As a modification, the silk is partly treated on the original foraminated spool and then transferred to a foraminated twisting spool, the treatment being completed while the silk is on the second spool. By forcing the baths through the silk the duration of the treatment is appreciably shortened. Specification 250,303 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes an arrangement, for use in carrying out the treatment, comprising a spool a of stainless steel covered with a layer b of felt, on which a mass c of silk is spun. The treatments are carried out in a vat d provided with pipe connections f to an exhaust pump, the pipes leading from seatings i; the spools are piled up on the seatings, packing pieces g being placed between their ends, and the exposed end of the uppermost spool being closed by a stopper h. The Specification refers also to the creation of a vacuum within the spool for the purpose of causing the passage of the liquid therethrough. This subject-matter does not appear in the Specification as accepted.
Patent GB-1170615-A (GB)
Title: Alternating Current Control Switch
IPC: H01H21/42
Filed: 1967-02-23
Abstract: 1,170,615. Snap-action switches. LODZKIE ZAKLADY APARATURY ELEKTRYCZNEJ. 23 Feb., 1967 [23 Feb., 1966], No. 8703/67. Heading H1N. In an alternating current switch a handle 8 on a shaft 3 actuates a frame 2 through an over-centre spring 6 and causes lateral movement of a pin 20. This slides in an inclined slot 18 in a contact carrying member 16 to raise or lower it in accordance with the direction of movement of the handle. Spring-loaded contacts 19 are mounted on the frame 16 for engagement with fixed contacts 23. The inclined slot 18 may be replaced by a cam surface in which case the member 16 is spring biased in a downward direction.
Patent GB-622099-A (GB)
Title: Improvements in and relating to radio receiving apparatus
IPC: H03G11/04
Filed: 1945-04-09
Abstract: 622,099. Radio receiving sets; frequency modulation. BRITISH THOMSON-HOUSTON CO., Ltd. April 9, 1945, No. 8725. Convention date, April 12, 1944. [Class 40 (v)] in a frequency-modulation receiver, amplitude limiting is effected by a rectifier which passes only the positive half-cycles of the incoming wave to the grid of a further valve which limits these positive half-cycles by plate current saturation. The I.F. output is fed through a transformer 12 tuned to the mean I.F. and having the centre tap of its secondary winding 13 grounded. Positive half-cycles of the I.F. wave appearing across the upper half of the secondary 13 are fed through a rectifier 14 and appear across a load resistor 15. The lower end of the secondary winding 13 is coupled through a condenser 17 to the diode cathode. The condenser 17 has a capacitance equal to the inter-electrode capacitance 16 of the diode and serves to neutralize the effect thereof. The positive half-cycles appearing across the load resistor 15 are applied through a resistor 18 to the control grid 19 of a pentode 20 the anode circuit of which is coupled through a tuned transformer 31 to the discriminator 33. The control grid 19, being grounded through resistors 15, 18 is maintained at a slight negative or contact potential and the valve 20 operates in the region of plate current saturation to limit the positive half-cycles, Fig. 2 (not shown).
Patent GB-247423-A (GB)
Title: An improved means for illuminating the dials of switch board instruments
IPC: B60Q3/04
Filed: 1925-04-01
Abstract: 247,423. Rotax (Motor Accessories), Ltd., Sparkes, T., and Hill, E. April 1, 1925. Dials and scales, illuminating.-Means for illuminating the dials of switch-board &c. instruments consists in providing the instruments a, b with glass fronts c proj.ecting beyond the bezels of the instruments and mounting them in a case d with a front e having apertures f in register with the glass fronts of the instrument. An electric lamp g is mounted in a holder h within the case to illuminate the dials by internal reflection through the projecting edge portions of the glass fronts. When mounted on a vehicle the rear lamp is connected in series with the lamp g, which will serve as an indicator to show whether the rear lamp is functioning.
Patent GB-609759-A (GB)
Title: Improvements in or relating to key drive
IPC: F16D1/08
Filed: 1946-03-21
Abstract: 609,759. Securing elements to shafts. EATON MANUFACTURING CO. March 21, 1946, No. 8759. Convention date, March 31, 1945. [Class 80 (ii)] [Also in Group XXV] A key connection between a shaft 10 and a member 12 comprises a spherical key 16 received in a hole 14 in the shaft 10, and engaging a slot 18 in the member 12. Endwise movement of the member 12 is limited by an end wall 20 of the slot.
Patent GB-552611-A (GB)
Title: Improvements in and relating to electric controllers
IPC: H01H7/02
Filed: 1941-07-11
Abstract: 552,611. Dashpots. ENGLISH ELECTRIC CO., Ltd., CARNEGIE, H. S., and HASSLER, E. H. H. July 11, 1941, Nos. 8796/41 and 5669/42. [Class 108 (iii)] [Also in Group XXXVII] A controller 6 Fig. 1 is operated to "Forward" or " Reverse" positions by movement of a lever 1 from a mid "off " position, under the action of a dash-pot 9 which effects different retardations according to the position and direction of movement of the lever 1. One form of dash-pot is drawn in Fig. 7. Upon movement of the piston 15 outwards, one of the valves 35, 36 opens and liquid flows through duct 17c and port 17a, being restricted by needle valve 33. Upon return movement of the piston towards the mid-position, one of the valves 37, 38 opens and liquid flows through port 17b and duct 17d, being restricted by needle valve 34. Various modifications are described. Free movement away from or towards the mid-position can be allowed. Separately adjustable retardations on either side of the mid-position can be provided. Retarded movement can be limited to a selected part of the travel of the piston. The needle valve can be by-passed by a valve which is closed electromagnetically when the motor current is above a certain value. The non-return valves 35-38 can be replaced by a piston-valve actuated by the pressure of the fluid in the dash-pot. Specification 519,887, [Group XXXVII], is referred to.
Patent GB-933303-A (GB)
Title: Electrically operated industrial trucks
IPC: B60T11/10
Filed: 1962-03-08
Abstract: 933,303. Controllers. YALE & TOWNE MANUFACTURING CO. March 8, 1962 [April 11, 1961], No. 8906/62. Class 38 (3). An electrically operated industrial truck has an electrical traction motor 20 and includes a fluid pressure operable braking unit 24 and a fluid pressure operable speed control unit 25 which are connected by flexible conduits 27, 28, respectively, to a master cylinder 26 whereby operation of the master cylinder supplies fluid pressure to both said units to first release the brake and then operate the controller. When the master cylinder is released, the controller is returned to neutral position and the brake then applied. The piston of the braking unit 24 is urged by a spring in a direction to apply the brake shoes 39, 40 to a brake drum 22. The piston of the speed control unit 25 operates a control rod 53 to actuate in sequence a plurality of switches 52 to vary the motor speed, the piston being spring-urged in the neutral direction of the controller. Depression of a spring- biased pedal 29 operates the master cylinder 26 via rod 30, bell-crank lever 31 and cylinder rod 32. When fluid pressure reaches controller unit 25 to release the control rod 53, springs 54 move the rod toward high speed position under the control of a dashpot 57.
Patent GB-1134831-A (GB)
Title: Improvements in or relating to optical depth assessing apparatus
Inventor: GREGORY RICHARD LANGTON
IPC: A61B3/032
Filed: 1965-03-02
Abstract: 1,134,831. Eye examining apparatus. NATIONAL RESEARCH DEVELOPMENT CORP. May 12, 1966 [March 2, 1965], No.8912/65. Heading G2J. The apparatus presents to one eye of an observer a first object and to his two eyes a second object which can take up different positions spaced from the observer. The indication of the distance of the second object obtained by binocular vision can be used to assess the distance of the first object. As shown, the apparatus is in the form of a box having electro-luminescent panels 11, 12, the latter being on a hinged door, and containing a partial reflector 18 so that the observer's eyes 13, 14 can view the two panels in super-position. In use panel 12 is swung out of the way, illuminated disc 21 is supported on rods so that its distance away from the observer can be varied and measured and a three-dimensional representation 15 is supported on panel 11. In addition, a polarizer covers the representation 15 and a crossed analyser 25 is disposed in front of the observer's eye 13. The apparatus can also be used to determine an observer's response to changes in illumination intensity by removing the illuminated disc 21, representation 15 and the polarizer and analyser and instead disposing apertured masks over the panels 11, 12 which are energized through a transformer so that the intensities may be varied while keeping constant the ratio between the difference in their intensities to the intensity of panel 11. Flicker phenomena may similarly be investigated. The apparatus may also be used as a stereoscope or a tachnistoscope.
Patent GB-1160312-A (GB)
Title: Driving Systems for Lift Doors
IPC: G05D3/00
Filed: 1966-03-01
Abstract: 1,160,312. Control of D.C. motors. HAMMOND & CHAMPNESS Ltd., and T. J. RIDDLESTONE. 20 Feb., 1967 [1 March, 1966], No. 8930/66. Heading H2J. [Also in Divisions E2 and G3] A shunt-wound motor 1a, which drives a liftdoor in a constant speed ratio, has its speed regulated continuously in accordance with the position of the door by means of transformer 4 whose coupling is varied by a cam-operated armature. The motor is supplied from a source of unsmoothed full-wave rectified current through silicon-controlled rectifier 14, the firing- angle of which is determined by the output from the transformer 4. This output is rectified and smoothed to control transistors T 1 , T 2 , the latter receiving a signal from resistor 20 representing the back-E.M.F. of the motor so that the amplitude of the output from transistor T 2  varies both in dependence on the signal from transistor T 1  and on the motor speed. The combined signal is amplified by transistor T 3  and then applied to the base of transistor T 4  having capacitor 22 in its emitter circuit. The signal passed on by the transistor T 4  controls a bistable circuit comprising transistors T 5 , T 6 , associated with transistors T 7 , T 8 , which effect inversion and amplification. The cam may be shaped to produce from the transformer 4 a simple harmonic output relative to the linear travel of the door, and the speed of the motor will vary in a similar manner with the shift of the firing-angle of the rectifier 14 during the door travel.
Patent GB-1422720-A (GB)
Title: Production of aryl-4,4-bis dialkylamino- benzhydryl- sulphones
IPC: B41M5/136
Filed: 1973-02-23
Abstract: 1422720 Aryl - (4,4<SP>1</SP> - bis - (dialkylamino)- benzhydryl)-sulphones BADISCHE ANILIN- & SODA-FABRIK AG 23 Feb 1973 [24 Feb 1972] 8935/73 Heading C2C A process for the production of a compound of the general formula in which R is methyl or ethyl and R<SP>1</SP> is phenyl or naphthyl optionally substituted with alkyl, chloro, nitro, hydroxy, amino or alkoxy comprises condensing a compound of the general formula wherein R is as defined above in acid solution at a pH of less than 6 with an aryl sulphinic acid or a water-soluble thereof, the acid having the general formula R<SP>1</SP>-SO 2 H where R<SP>1</SP> is as defined above. Examples are furnished.
Patent GB-998717-A (GB)
Title: Photographic type composing apparatus
IPC: B41B27/28
Filed: 1961-06-28
Abstract: 998,717. Photographic type - composing. HARRIS - INTERTYPE CORPORATION. June 28, 1961 [June 30, 1960 (2)], No. 8943/65. Divided out of 998,713. Drawings to Specification. Heading B6W. A photographic type-composing machine comprises a character matrix including data thereon relating to the relative width of each character, means for projecting the character images in succession on to a sensitized surface and adjusting the image sizes in accordance with a selected point set factor, the projecting means being operated by record-controlled selector means which also operates scanning means to record the relative width data on the matrix for each character upon photographing thereof, and computing means for multiplying the relative width by the point set factor to provide a digital output for the actual width. The subject-matter is the same as that of Specification 998,713. Specifications 768,374, 891,142, 912,201 and 989,626 also are referred to.
Patent GB-564734-A (GB)
Title: Improvements in or relating to a process for recovering sulphur dioxide from a gas mixture containing the same
IPC: C01B17/60
Filed: 1942-06-29
Abstract: 564,734. Recovering sulphur dioxide. STEVENS, A. H. (American Smelting & Refining Co.). June 29, 1942, No. 8955. Drawings to Specification. [Classes 1 (i) and 1 (ii)] In the recovery of sulphur dioxide from gas mixtures by scrubbing with an aromatic amine, the exit gases from the absorber are treated first with sodium carbonate solution and then with sulphuric acid to remove entrained amine. The acid and alkali solutions are preferably mixed and treated with steam, and the vapour phase is passed into the used amine reagent to expel the sulphur dioxide therefrom, whereupon the stripped reagent is returned to the absorber. The liquid phase is separated into an amine phase, for return to the absorber, and an aqueous phase, which may be partly returned to the mixed solutions.
Patent GB-537594-A (GB)
Title: Improvements in and relating to apparatus for covering rollers for textile machinery
IPC: B27J5/00
Filed: 1940-05-21
Abstract: 537,594. Covering textile rollers. SCRAGG & SONS, Ltd., E., and LLOYD, R. A. May 21, 1940, No. 8994. [Class 42 (ii)] [Also in Group IX] A mould for use in applying cork &c. coverings to rollers consists of two complementary semicircular members 4, 6 hinged at one side 5 and clamped at the other side 7. The covering 8 is laid in the member 6. with its cemented face inwards, the roller 9 is inserted and the cover bent over it by means of the member 4 and clamped until the cement is set.
Patent GB-1382575-A (GB)
Title: Casting of shaped articles from inverted emulsions
IPC: B29C33/00
Filed: 1971-04-08
Abstract: 1382575 Lubricating moulds IMPERIAL CHEMICAL INDUSTRIES Ltd 30 March 1972 [8 April 1971] 9045/71 Heading B5A A method of casting articles which require relative sliding movement between the article and the mould to effect their separation comprises applying a softenable coating, e.g. a wax, to the mould, casting a curable emulsion in the mould, curing to form a water extended polymer, and softening the coating either by externally applied heat or the exotherm of the curing resin to facilitate separation of the article from the mould. In an example, a fence post having holes extending therethrough is produced from polymethylmethacrylate by casting a methylmethacrylate emulsion in a rectangular mould containing wax coated steel tubes as formers, the wax being applied by dipping. The heat evolved during the curing reaction is sufficient to melt the wax, the formers then being removed. Suitable monomers for use in the invention include styrene, methacrylate or aerylate esters, vinyl acetate, vinyl chloride, vinylidene chloride and butadiene. Fillers, colouring agents, reinforcing fibres may be employed.
Patent GB-469263-A (GB)
Title: Improvements in and relating to the nozzles of vacuum cleaners
IPC: A47L9/06
Filed: 1936-03-27
Abstract: 469,263. Vacuum cleaners. CO-OPERATIVE WHOLESALE SOCIETY, Ltd., and LINE, R. H. March 27, 1936, No. 9099. [Class 8 (i)] The suction nozzle a, is hinged to the socket el which is in connection with the suction side of the cleaner by providing the back of the nozzle with a longitudinal ridge b of semicircular transverse crosssection. The socket e is provided with a saddle piece f which fits on the ridge b, screws h located in caps g pass through slots d in the ridge and are secured by internal nuts i. The screws may be provided with loading- springs j.
Patent GB-1517918-A (GB)
Title: Ventilator
IPC: F04B39/10
Filed: 1975-07-01
Abstract: 1517918 Valves KASON HARDWARE CORP 1 July 1975 [22 Nov 1974] 9102/75 Heading F2V [Also in Division F4] A ventilating device for use in equalizing the pressure between a cold store room and the ambient, comprises within a ventilating duct 11, an apertured fluid-impervious plate 28. Closure elements 35, 36 are mounted on either side of the plate 28; element 35 being adapted to close apertures 29, 30, and element 36 to close apertures 31, 32. In operation, if the pressure on one side of the plate 28 should increase by an amount sufficient to overcome a helical biasing spring 44, then the respective closure element will be forced away from the plate 28. The spring 44 is mounted on a guide shaft 38 which passes through the plates 35, 36 and the plate 28: the shaft being rectangular in crosssection to hold the plates in their correct position. Electrical heating means 45 are provided to keep the valve at a constant operating temperature. A junction box 16 for the electrical connections is positioned above the ventilator duct. Louvered cover plates 53, 60 and filter meshes 52, 59 are disposed at either end of the duct.
Patent GB-697716-A (GB)
Title: Method of operating directly heated tunnel kilns
IPC: F27D5/00
Filed: 1949-07-07
Abstract: 697,716. Tunnel kilns. CREMER, G. July 7, 1949 [Dec. 27, 1948], No. 9132/52. Divided out of 697,644. Drawings to Specification. Class 51(ii) The subject-matter of this Specification comprises part of that of Specification 697,644 as open to inspection under Sect. 91.
Patent GB-566096-A (GB)
Title: Method of widening on a straight bar knitting machine, and the product thereof
IPC: D04B11/00
Filed: 1943-06-07
Abstract: 566,096. Knitting. COTTON, Ltd., W., and OAKLEY, W. June 7, 1943, No. 9138. Drawings to Specification. [Class 74 (ii)] Widening without loop transference is effected upon a straight-bar machine by employing two yarn carriers each feeding a yarn to the needles, controlling their draw so that one traverses two needles beyond the other, and increasing their draw at each edge to be widened by two needles at intervals of not less than four courses. The carrier which traverses beyond the other may be the main carrier, the other carrier feeding a splicing or plating yarn. The two needle difference in traverse may be employed during the knitting of an unwidened or parallel part of the fabric prior to the widening. Each carrier stops over a dividing sinker.
Patent GB-236661-A (GB)
Title: Improvements in and relating to apparatus for duplicating with the aid of stencils
IPC: B41L13/04
Filed: 1924-04-10
Abstract: 236,661. Gestetner, D. April 10, 1924. Stencilling. - In duplicating-machines of the type wherein a composite representation is produced by applying a number of inks in succession through a corresponding number of stencils, each stencil is mounted on a carrier comprising flexible metallic bands between which a sheet of gauze is secured, each carrier being mounted on non-absorbent inking cylinders associated with means for distributing an oily or greasy ink over the surfaces thereof. As shown, the machine consists of a series of duplicators of known type, each comprising a frame 2, supporting inking cylinders 3, waver roller 4, stencil-carrying bands 5, and impression roller 6, the cylinders being driven by chains 14 from a hand-crank 15. To adjust the alignment or register of the several impressions, the frames 2 may be capable of longitudinal, lateral, and angular adjustment. The machine may operate on sheets or a web, means being provided, in the case of a web, to take up the slack and to adjust the web for register.
Patent GB-696469-A (GB)
Title: Silencers for gaseous currents
IPC: F01N13/00
Filed: 1952-04-10
Abstract: 696,469. Exhaust-silencers. MAXIM SILENCER CO. April 10, 1952 [June 23, 1951]. No. 9203/52. Class 7 (ii). A cylindrical casing 10 is divided by a partition 19 into an outer annular chamber 20 and an inner cylindrical chamber 21, and a number of outlet conduits 24, which may be provided with flared ends 26 and holes 27 to prevent shock exitation, pass through the wall of the casing and the partition into the chamber 21. The gases flow from an inlet conduit 22 entering the chamber 20 and through apertures 25, which may surround the conduits 24, into the chamber 21. There may be a recess in one of the end plates of the casing to accommodate the housing of a cooling fan.
Patent GB-1525093-A (GB)
Title: Process for the production of poly-n-butenes
IPC: C08F4/14
Filed: 1977-03-04
Abstract: 1525093 Liquid butane polymer preparation COSDEN TECHNOLOGY Inc 4 March 1977 [5 March 1976] 9269/77 Heading C3P [Also in Division C5] A liquid polybutene of molecular weight 335-1300 having an increased poly n-butene content is prepared by polymerizing a C 3 -C 5  liquefied feed containing at least 3% butylenes at 65-115 F. in the presence of 0À035-0À1 wt. per cent dry AlCl 3  particles promoter with a minor amount of promoter, e.g. HCl.