baber/WOPTO huggingface dataset:
Patent GB-1107523-A (GB)
Title: Control circuit for servo mechanisms
IPC: H02P23/00
Filed: 1965-06-04
Abstract: 1,107,523. Electric control. UNITED AIRCRAFT CORPORATION . June 4, 1965 [June 10, 1964], No. 23835/65. Heading G1N. [Also in Division G3] A required speed for a turbine is preset at 44, Fig 3, by a circuit including a transistor T4, and compared with a measured speed signal, from 38, in a differential amplifier 46, the error signal being used to control fuel valve apparatus 52, 54, 56; and overshoot of engine speed is avoided by subtracting from the present signal, if the error signal exceeds a signal representing some other parameter of operation, a fixed bias voltage derived from a circuit including transistors T2, T3, this fixed voltage being gradually reduced after the error signal has dropped below the said other signal. In the turbine (10), Fig.1 (not shown), transducers (33, 36) measure the temperature of inlet and exhaust, pulse pick-ups (38, 40) measure the speeds N2 and N3 of the main turbine shaft and "free turbine" shaft, and transducer (42) measures pressure at the burner (16) inlet. The temperature signal from 33 (see Fig.3) is used to modify the speed signal from 38 in the error signal producing section 35, and the other three signals from 36, 42, 40 are supplied, together with the output of the differential amplifier 46, to a gating circuit 50. This circuit 50 allows the fuel valve to be controlled by the most positive signal, this being the one requiring least fuel so that a large desired increase in speed, as required by the preset circuit including the transistor T4 cannot impose demands on the turbine in excess of its safe working limits, as dictated by the temperature, speed and pressure signals from 36, 40, 42. When the error signal, supplied via a transistor T1 to the diode 60 in the gating circuit 50, is rendered inoperative due to one of signals from 36, 40, 42 being more positive, then transistor T1 ceases to conduct, transistor T2 turns off, and transistor T3 conducts to charge a capacitor C1, which applies a fixed voltage Vc3 to a summing device 53, thereby reducing the preset signal from transistor T4. When turbine speed has increased, to say 95% of its required value, T1 again conducts, and the transistor T3 is turned off, so that the capacitor C1 slowly discharges, and allows the output of the summing device 53 to increase slowly to the preset voltage from T4. Stability of the system is achieved by means of a derivative feedback loop 51. Safety circuits are incorporated in the lines from transducers 36, 40, 42 to limit fuel flow if any of the measured operating conditions approach critical values.
Patent GB-501542-A (GB)
Title: Improvements in process of glutamic acid production
Filed: 1937-08-31
Abstract: 501,542. Glutamic acid. STANDARD BRANDS, inc. Aug. 31, 1937, No. 23848. Convention date, Sept. 2. 1936. [Class 2 (iii)] Glutamic acid is prepared by mixing undried wheat gluten with so much concentrated hydrochloric acid that an approximately 10 per cent solution thereof is formed in the resulting mixture which is heated to give glutamic acid until sufficient of the hydrogen chloride has combined with the reaction products to reduce the concentration of the former to about 4 per cent, glutamic acid then being recovered. Wet wheat gluten containing about 66 per cent water is mixed with <2>/5ths. of its weight of about 30 per cent hydrochloric acid giving a final concentration of about 10. per cent. The mixture is heated for about 6 hrs. at 125‹ C. and 20 lb. / in<2>. The glutamic acid, other amino-acids, and ammonia formed combine with part of the hydrochloric acid, the resulting concentration of which is about 4 per cent. The product is filtered, the filtrate preferably extracted with, e.g., benzene or carbon tetrachloride, and treated with decolorizing carbon, and then heated, preferably under reduced pressure, to distil free HCl and water in the form of a constant-boiling acid which can be used for treating more gluten. The syrupy residue can be mixed with concentrated hydrochloric acid and cooled to 0‹ C., .when glutamic acid hydrochloride crystallizes. The mother liquid can be further worked up if desired. The free acid or its salts are obtained in known manner.
Patent GB-732326-A (GB)
Title: Bricks and methods of employing same in building constructions
IPC: E04C2/04
Filed: 1953-08-28
Abstract: Waterglass admixed with fine brick dust is used for cementing together light-weight bricks.
Patent GB-501745-A (GB)
Title: Improvements in or relating to the manufacture of chloroderivatives of alkyldiphenyls
IPC: C07C17/12
Filed: 1937-09-04
Abstract: 501,745. Chlorinated alkyldiphenyls; lubricants. DU PONT DE NEMOURS & Co., E. I., LEVINE, A. A., and CASS, O. W. Sept. 1, 1937, No. 23878. [Class 2 (iii)] [Also in Group III] Chlorinated alkyldiphenyls are prepared by the action of gaseous chlorine at a moderately low temperature, such as atmospheric temperature or below, on alkyldiphenyls which are liquid at the reaction temperature, the process being effected in the absence of a solvent and in the presence of iron as a catalyst, and preferably with the exclusion of light. Examples are given in which ethyldiphenyl, diethyldiphenyl, isopropyldiphenyl, diisopropyldiphenyl and methyldiphenyl are chlorinated, the specified products including pentachloro-ethyldiphenyl, a mixture of tetra and penta-chloro-diethyldiphenyls, pentachloro-isopropyldiphenyl, octachloro-isopropyldiphenyl, pentachloro-diisopropyldiphenyl, and pentachloro-methyldiphenyl; . pentachloro-ethyldiphenyl is stated to have lubricating properties. The alkyldiphenyls used as starting materials are obtainable by reacting diphenyl with the appropriate alkyl halide in the presence of aluminium chloride. Specification 410,008 is referred to.
Patent GB-1039789-A (GB)
Title: Improvements in and relating to tunnel diodes
IPC: H01L23/485
Filed: 1963-06-17
Abstract: An alloy used in the manufacture of tunnel diodes (see Division H1) contains by weight .1-5% arsenic, .1 - 10% antimony 15 - 80% tin and the balance lead. The preferred ally consists of 2% arsenic, 5% antimony, 58% tin and 35% lead.
Patent GB-302297-A (GB)
Title: Improvements in the recovery of volatile organic solvents
IPC: C10K1/18
Filed: 1927-09-12
Abstract: 302,297. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Sept. 12, 1927. Volatile solvents, recovering.-Volatile organic solvents such as are vaporized in the production of lacquers, artificial silk, and in cleaning fabrics, &c. are recovered from the gases containing them by washing the said gases with the products having a boiling point above 200‹ C. obtained as by-products in the catalytic hydrogenation of oxides of carbon to methyl alcohol. A current of air saturated with benzene at 20‹ C. is treated in an absorption tower on the counterflow principle with a washing oil obtained as set forth above. The oil absorbs 59 per cent of its weight of benzene at 20‹. C. The by-products referred to consist of a preponderating proportion of alcohols of high molecular weight together with a heterogenous mixture of ketones, aldehydes, esters, and other organic compounds of a non-identified structure containing oxygen.
Patent GB-757725-A (GB)
Title: Improvements in or relating to silent chain
Inventor: BREMER NORMAN CHARLES
IPC: F16G13/04
Filed: 1953-08-31
Abstract: 757,725. Driving-chains. MORSE CHAIN CO. Aug. 31, 1953, No. 24007/53. Class 24. Chordal action in an inside contact inverted tooth driving chain is eliminated by providing each joint pin 30 with a flat bearing surface 32 which rocks on an arcuate bearing surface 34 forming part of the pin-receiving aperture in alternate links 22 so as to provide a progressive elongation of the chain pitch as the chain is bent around a sprocket. The intervening links 221 have apertures 35 in which the pins 30 are fixed. The arcuate bearing surface 34 is inclined with respect to the longitudinal pitch line to prevent reverse bending of the chain, which is further prevented by providing certain of the links with abutting portions 50 and 51. The teeth of the chain and sprocket are generated for conjugate relationship, one or the other being involute.
Patent GB-865372-A (GB)
Title: Improvements in or relating to apparatus for handling business transactions
IPC: H04M1/656
Filed: 1958-07-25
Abstract: 865,372. Telephone interconnection systems. UNIVERSAL CONTROLS Inc. July 25, 1958, No. 24060/58. Class 40 (4). Telephone calls relating to betting, credit, or other business transactions involve recording and reproducing the speech as an essential step in transmission. At a totalizator office incoming speech is recorded in and reproduced from one channel A of a magnetic tape, the other channel B handling outgoing speech. Code signals identifying the machine 42 issuing a ticket may also be recorded in channel B. In the event of a dispute the tape may be played back. The better uses dial 12 to indicate the amount of the bet he wishes to place and so gets through to an attendant and machine handling that size of bet.
Patent GB-759915-A (GB)
Title: Improvements in joints in systems for transmitting fluid pressure
Inventor: COCKRAM REGINALD WILLIAM JAMES
IPC: G08B17/04
Filed: 1953-08-31
Abstract: 759,915. Temperature-responsive actuating- elements. PYRENE CO., Ltd. Aug. 31, 1954 [Aug. 31, 1953], No. 24062/53. Class 64(2). [Also in Group XXIX] A joint between tubes 2, 8 enabling pressures to be transmitted from one to the other but preventing flow therebetween comprises a cylinder 6 secured to the tube 2 and having fixed thereto a bellows 16, the free end of which is closed by a plate 22 and diaphragm 28. Tube 8 is fixed to a cover 10 to which is secured a bellows 18 closed at its free end by a diaphragm 30 and a ring 24 which abuts plate 22. The cover 10 is held in place by a ring 14 screwing on to the cylinder 6. Thermal expansion of liquid in the tube 2 due to fire compresses both bellows and produces a corresponding rise in pressure in tube 8 to operate control apparatus. If the rise in pressure is excessive the diaphragms are ruptured, e.g. by a piercer 32. Several tubes 2 may be connected in series or parallel by the bellows joints to one tube 8. For test purposes the free end of a tube 2 may terminate in a small bellows which can be compressed to check the sensitivity of the detector. Specification 700,504 is referred to.
Patent GB-1299142-A (GB)
Title: Improvements in or relating to self-gripping fastening device
Inventor: BRUMLIK GEORGE CHARLES
IPC: A44B18/00
Filed: 1971-04-19
Abstract: 1299142 Strip fastenings G C BRUMLIK 19 April 1971 [16 March 1970] 24079/71 Heading E2S A self-gripping fastener for connecting a pair of articles comprises a plurality of fastening elements 10 Fig. 2, secured to a surface of one of the articles, each element being an elongated strip, notched along its length to form undercut barbs 20, and having a portion extending perpendicular from said surface, the portion penetrating the other article and effecting the adhesion between the articles. The barbs, which may extend in both directions along the strip e.g. 130, 128 Fig. 5, can be arranged in one or more rows along the strip. The elements, which may have a uniform cross section e.g. circular, elliptical or triangular, may be attached to the surface at one of their ends or at their central portion, and may extend from one surface Figs. 6, 19 (not shown) or two opposite surfaces Figs. 8, 20 (not shown).
Patent GB-1254837-A (GB)
Title: Dry cleaning process
IPC: D06L1/08
Filed: 1970-05-19
Abstract: 1,254,837. Dry cleaning process. F. W. MEANS & CO. 19 May, 1970, No. 24092/70. Heading D1P. A process for cleaning soiled textile articles, comprises contacting the soiled articles with a petroleum mineral oil, agitating the oil and removing the excess oil from the cleaned articles. The soiled textile articles may be soiled oil-impregnated cleaning utensils and the process temperature may be 60-250‹F., 20-40% by weight petroleum mineral oil being left on the cleaned oil impregnated utensil. The used oil is continually removed and clean oil added, the former being cleaned and recycled. The oils have a viscosity of 38-60 SUS at 210‹F and 100-800 SUS at 100‹F. Excess oil can be removed from the article by centrifuging and if desired essentially all of the oil is removed by contacting the article with a dry cleaning solvent selected from hydrocarbons halogenated hydrocarbons or mixtures thereof. The Specification includes a flow diagram for a continuous process.
Patent GB-390713-A (GB)
Title: Improvements in and relating to refrigerating machines
IPC: F25B43/04
Filed: 1932-08-29
Abstract: 390,713. Refrigerating. AKT.-GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. Aug. 29, 1932, No. 24125. Convention date, Sept. 22, 1931. [Class 29.] Vacuum machines.-In refrigerating-machines working with internal pressures below atmospheric, the air which has leaked into the machine together with some vapour passes from the condenser 9 through a pipe 10 provided with a cooling coil 11 in the evaporator 7 into a vessel 13 and indicates its presence by bubbling through the liquid therein, then accumulating in the space 13a from which it is removed periodically by a pump 1. The space 13a may be in permanent open connection with the evaporator. The vessel 13 may communicate with the evaporator 7 at its lower end so that the accumulating air can force down the liquid in the vessel and operate the pump 1 automatically through a float device. The observation window 14 is hollow and evacuated to prevent deposition of hoar frost thereon.
Patent GB-1267350-A (GB)
Title: Detection system for indicating the passage of bodies
Inventor: SELLWOOD RAYMOND ERNEST
IPC: G08B13/24
Filed: 1968-07-26
Abstract: 1,267,350. Inductive signalling. M.L. AVIATION CO. Ltd. 24 Oct., 1969 [26 July, 1968; 12 May, 1969], Nos. 35865/68 and 24134/69. Heading H4U. [Also in Division G4] A system for indicating the passage of articles past a given point comprises an inductive loop 2 surrounding the expected path of the article a pulse generator 10 for providing pulses of oscillatory current in the loop 2, a resonant oscillating circuit 12' mounted on the article and a receiver 11 arranged to be inhibited during the pulses from generator 10 but to; receive signals retransmitted from circuit 12 as the article passes through the loop 2. As described, pulses from generator 8 are fed to a Schmitt trigger 9 which turns on a 16 kHz oscillation generator 10-for 5 ms. once every 20 ms. so as to feed pulses of 16 kHz current into the loop 2. Pulses from 8 are fed to a further Schmitt trigger 14 which renders a receiver 11 operative for 8 ms. during each interval of 15 ms. between pulses from circuit 10. Protected articles (e.g. radio or television receivers in a shop) are each fitted with a small pick-up circuit 12 comprising a pair of ferrite rods mounted at right angles to one another, each carrying a pair of windings, one of which serves as a pick-up coil while the other serves as a radiator. Each -pair of coils is associated with a transistor amplifier having positive feedback such that upon reception of a pulse from loop 2, the circuit 12 oscillates for a period at least as great as that during which the receiver 11 is operative. The operative receiver 11 may operate an acoustic alarm 16 or, as in Fig. 3 (not shown), may be arranged to inhibit a photo-electric alarm situated further along the path of the article. Such a system may be used to prevent unauthorized persons (i.e. those not carrying a pick-up circuit (transponder)) 12 from entering a hazardous zone.
Patent GB-388441-A (GB)
Title: Improvements in or relating to coke-oven doors
IPC: C10B25/12
Filed: 1931-08-27
Abstract: 388,441. Coke-oven doors. KOPPERS CO. OF DELAWARE, Koppers Building, Pittsburg, U.S.A.-(Assignees of Huffmann, G.; Koppers Building, Pittsburg, U.S.A.) Aug. 27, 1931, No. 24154. Convention date, Sept. 6, 1930. [Class 123 (i).] The leveller door 8 of a coke oven is moved vertically by a lever 28 so that a latch bar 19 is clear of inclined hooks 20 before the door can be swung open on its hinges 15 which are segmented to prevent the door from being opened until it is raised. The latch bar 19 engages the hooks 20 when the door is closed and lowered, and automatically forces the door against the frame 11. The door 8 is tightly clamped against the frame 11 by a lever 25 and cam 24 which coacts with a bolt 22 projecting through the door.
Patent GB-641779-A (GB)
Title: Improvements relating to the support of the roofs in mine workings
IPC: E21D15/48
Filed: 1947-07-22
Abstract: 641,779. Mine props. NOUVELLE SOC. DE CONSTRUCTIONS METALLIQUES COMETAL, and HUGHES, R. M. July 22, 1947, No. 24170/49. Divided out of and addition to 641,727. Drawings to Specification. [Class 20(ii)] Various modified cross sections are shown of the hollow metal mine prop having hollow reinforcing ribs of the parent Specification.
Patent GB-371732-A (GB)
Title: Improvements relating to imitation fires
IPC: F24C7/00
Filed: 1931-08-28
Abstract: 371,732. Imitation fires. FALKIRK IRON CO., Ltd., KENNARD, H. J., KINNES, A., and ERSKINE, J. H., Falkirk, Stirlingshire. Aug. 28, 1931, No. 24204. Addition to 361,608. [Class 126.] In an imitation fire comprising two or more spaced zones of imitation fuel, as described'in the parent Specification, the fuel is illuminated both by steady and by flickering light. In the construction shown steady light is provided by lamps f, and flickering light by lamps d provided with flicker devices. One or more of the fuel zones may have translucent portions b in addition to the apertures c through which the lower zones are visible. The upper zone indicates burning fuel, and the lower zones burnt fuel or ash. A screened lamp, such as that shown at h, may illuminate the front of the fuel with steady or flickering light.
Patent GB-884052-A (GB)
Title: Sheet-metal wall for a self-supporting blast furnace
IPC: C21B7/00
Filed: 1960-07-12
Abstract: 884,052. Blast furnace walls. ACIERIES DE PARIS ET D'OUTREAU. July 12, 1960 [Aug. 25, 1959], No. 24205/60. Class 51 (2). In a blast furnace without a ring girder supporting the shaft, a cast steel ring 3 disposed between the shaft shell 2 and the shell of the boshes 1 is welded thereto at 4 and 5 respectively and has substantially greater wall thickness. Typical measurements are 40 mms. for the shell of the boshes, 60 mms. for the ring, and 30 mms. for the lower shaft shell. The centre portion of the ring is rounded and an angle of about 150 degrees is enclosed between the generatrices of the frusto-conical end portions.
Patent GB-1072153-A (GB)
Title: Improvements in and relating to printing plate moulds and process for producing the same
IPC: B29C70/08
Filed: 1964-06-11
Abstract: A printing plate mould is produced by spraying an original with a metal or metal alloy, stripping the sprayed layer from the original and applying a backing of a plastic material, such as a polyester or epoxy resin, to the sprayed metal &c., layer. Reinforcing material in the form of lamina or powder may be applied during the spraying of the original.  The operative surface of mould may be provided with a layer of tin or nickel and/or copper by electrodeposition.  Printing plates may be produced from the mould by spraying with bismuth, tin, cadmium, or an alloy, and then applying thereto a layer of tin or zinc which may contain a hard metal such as antimony.
Patent GB-361892-A (GB)
Title: Improvements in or relating to hay rakes
IPC: A01D76/00
Filed: 1930-08-14
Abstract: 361,892. Rakes. NICHOLSON, A. C.. Trent Iron Works, Newark-on-Trent. Aug. 14, 1930, No. 24304. [Class 6 (iii).] In a horse rake, a link 9 is mounted on the tinecarrying frame 4 and is pivotally connected to a link 10 which is provided at its other end with a pin 11 which slides in a slot 12 in a casting 13 secured to the main frame 2. A spring-pressed catch 15 pivoted on the casting 13 presses against the end of the link 10 and holds the frame 4 in position. To operate the tines a pedal on the catch 15 is depressed and moves the latter out of engagement with the end of the link 10. In a modification, the catch 21 is pivotally mounted on a pin carried on a bracket 22 and is held in position by a spring-pressed plunger 23, a foot pedal 24 being attached to or formed integrally with the catch. A hand-lever 25 is pivoted at 29 to a bracket 26 mounted on the frame 2 and is pivoted at 28 to a bracket 27 mounted on the lever 10, the pivots 30, 28, 29 being in a straight line. When applied to a self-acting rake, in which ratchet wheels 33 are attached to the wheels at each end of the main axle and pawls 34 are moved by the operator into mesh with the wheels 33, the catch 21 must be released when the pawls 34 mesh with the ratchets 33 so that the rocking frame may be tilted. To accomplish this, the pawls 34 are pivoted in journals at each end of the bar 5 and are supported by the cranked ends 37 of a pawl rod 38, said ends 37 passing through sockets 39 on the pawls 34. The rods 38 are carried in bearings 40 fixed to the bar 5. In the working position, the inner ends 37 rest on ledges 41 of a rocker 42 pivotally mounted at 43 on the link 10, and the rocker 42 is displaced at will by the operator through the link 44 and pedal 45, the latter being pivoted on a pin 46 supported on the frame 2 by a lug 47 and part 26. When the pedal 45 is depressed, the ledges 41 are withdrawn from below the inner cranked ends 37 of the rods 38, the weight of the pawls 34 causing the latter to swivel in their bearings 40 and the pawls themselves to mesh with the wheels 33. Simultaneously the push rod 48, which is pivoted to the rocker 42, and slides in a block 49 secured to the link 10, slides through the block 49 and contacts with a wing 51 of the catch 21 pushing the latter out of contact with the link 10. As the rod 48 moves through the block 49, a spring 50 is compressed and tends to return the rocker 42 to its position of rest, determined by a stop 52 on the rocker. To prevent the return of the latter until the tilting of the frame has begun a skirt 53 on the rocker 42 contacts with the ends 37 after the pawls 34 are in mesh with the wheels 33 and holds the rocker in its displaced position until the catch 21 no longer contacts with the end of the rod 10. In another . modification, the locking catch is mounted in the end of the rod 10 and engages a portion of the frame 2. Means are also provided for retaining the rocking frame 4 in the tilted position for travelling or turning the machine.
Patent GB-674991-A (GB)
Title: Steam generator
IPC: F22B1/06
Filed: 1949-09-22
Abstract: 674,991. Steam boilers. BOWLES, C. V. Sept. 21, 1950 [Sept. 22, 1949], No. 24363/49. Class 123(ii). A steam boiler comprises a heated annular chamber 1, containing mercury, &c, and a vertical axial mixing tube 3, which extends between the lower ends of mercury feed tubes 2, depending from the top of the chamber 1, and an upper steam separator 6 and into the lower end of which water from a supply pipe 9 is injected through a non-return valve 10 and nozzle 8. The separator consists of a helical tube having inner peripheral orifices 5<SP>1</SP> and it is provided with a steam outlet 7 and mercury return tubes 11, the latter leading back to the bottom of the chamber 1.