baber/WOPTO huggingface dataset:
Patent GB-1349689-A (GB)
Title: Method and apparatus for separation of particulate material by the application of electric fields
IPC: B03C7/02
Filed: 1971-05-25
Abstract: 1349689 Electrostatic separators FMC CORP 25 May 1971 [9 July 1970] 16812/71 Heading B2J  Fine particulate material moving in a path with a horizontal component is separated by applying an electric field across said path between electrodes spaced above and below said path and extending transversely to said path. As shown, particulate material M such as mixed mineral ores to be separated is fed by a vibratory feeder trough and hopper combination 22 which may be heated into one end of the electrostatic separator 20 through which it is propelled by a vibratory feeder 46. The separator comprises top and bottom electrode plates 42, 40 which have matching electrode grids 60 (62) painted or sprayed on their upper and lower surfaces respectively in a herring- bone pattern. The electrodes are connected to an AC supply with a higher potential being supplied to the central portions 60a, b (62a, b) than to the outer portions 60c, (62c). Particles which are influenced by the electric field tend to move laterally across the plate 40, past deflector members 80 and barrier structures 90 to pass through apertures 97 into a collecting trough 26. Those particles which pass through deflector members 80 but do not reach the barrier structures 90 are guided at 103 into middling containers 28 for re-cycling. Material which is not influenced is discharged by chute 54 onto a conveyor 24. The matching electrode grids on plates. 42, 40 are preferably staggered longitudinally (Fig. 8, not shown). Several electrodes may be stacked on top of each other. Different frequencies in the audio range may be supplied depending on the response characteristics of the material to be separated.. Different frequencies may be supplied to different longitudinal portions of the electrode grid structure to separate different materials sequentially. The electrode plates may be tilted sideways and/or be rifled to assist the separation.
Patent GB-928399-A (GB)
Title: Improvements relating to crystal valves
Inventor: SCOTT WILLIAM JOSEPH
IPC: H01Q19/12
Filed: 1960-05-12
Abstract: 928,399. Semi-conductor devices. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 11, 1961 [May 12, 1960], No. 16830/60. Class 37. [Also in Group XL (b)] A crystal valve to be connected in a coaxial line has means for tuning the cavity containing the cat's whisker and the crystal independently of the setting of the cat's whisker contact with the crystal. In the arrangement shown in Fig. 1 the crystal 3 is supported on a conductor 2 itself supported in a glass disc 6 which forms a glass-to-metal seal with a metal collar 4 soldered to the casing 1. The cat's whisker is carried on a plug 9 which may be adjusted to or from the crystal in a barrier member 11 and then clamped in position possibly by being made a force fit. The barrier also carries plugs 13 of metal or dielectric material coupled together at 14 so as to be adjustable together to tune the cavity. A further arrangement (Figs. 3 and 4, not shown) uses screwed plugs while in the arrangement of Figs. 5 and 6, not shown, a U-shaped member carries the cat's whisker at the bottom of the U while a further U inverted with respect to the first and at right angles to it tunes the cavity when its limbs are advanced into it. In the arrangement of Fig. 7 tuning is effected by plugs 24 which are adjusted by a screw 27. This deforms a diaphragm 28 carrying the plug and sealing the cavity and the diaphragm remains permanently deformed. In the arrangement of Figs. 8 and 9 the crystal is mounted on a plug 30 the connection of which is shown in Fig. 9. The plug is adjustable and is then clamped against a resilient strip 33 by grub screw 32. This strip may be adjusted to tune the cavity by flexing it about a longitudinal axis.
Patent GB-1084418-A (GB)
Title: Improved tie-bar and bushings therefor
IPC: F16C7/00
Filed: 1965-04-21
Abstract: 1,084,418. Helicopter rotors. BENDIX CORPORATION. April 21, 1965 [April 24, 1964], No. 16889/65. Addition to 1,045,723. Heading B7W. [Also in Division F2] The tie-bar of the parent Specification, comprising layers of tape formed by spaced parallel filaments, e.g. wire, bonded together and encased in an elastomeric substance, e.g. polyurethane, encircling a pair of end bushes, is provided with modified bushes. Each comprises a flanged member 44, formed by cutting away part of a flanged cylindrical bush, the cuts 48 being non-radial, with two flanged elastomeric pieces 50 bonded to the laminated portions 10 of the tie-bar and to the surfaces 48 of the member 44. The tie-bar is used to connect a helicopter rotor blade to a rotor hub.
Patent GB-638309-A (GB)
Title: Detachable couplings
IPC: F16D1/06
Filed: 1947-06-26
Abstract: 638,309. Securing knobs on shafts. PHILCO CORPORATION. June 26, 1947, No. 16894. Convention date, Aug. 22, 1946. [Class 80 (ii)] A coupling assembly suitable for connecting the operating knob 8 of electrical. apparatus with its associated shaft 5 is disconnected by a small relative rotation of the knob and shaft. A collar portion 10 of the knob which is bored to receive the shaft 5 has a resilient coupling member 7 attached by one end 11 to the interior thereof. The blade portion 12 of coupling member 7 bears backwardly at approximately 45 degrees with respect to the axis of the knob to allow the latter to be pushed on to the shaft 5, the end of the blade 12 then pressing against the surface of a flattened portion 6 of the shaft. Due to the relatively sharp lower edge of blade 12 the knob may not be removed by an outward pull but a slight rotation of the knob relative to the shaft makes an upwardly curled comer 15 contact the surface 6 to allow ready removal. In a modification the coupling element 7 is secured to the shaft 5 and bears against a flattened surface on the interior of collar 10.
Patent GB-1346958-A (GB)
Title: Heterocyclic compounds their production and use
IPC: C07D213/74
Filed: 1972-04-12
Abstract: 1346958 1-Pyridyl-2-benzyl-isothioureas SUMITOMO CHEMICAL CO Ltd 12 April 1972 [30 April 1971] 16934/72 Heading C2C [Also in Division A5] Novel compounds of Formula (I) wherein M is a group of the formula -NR 1 R 2  in which R 1  is a hydrogen atom, a C 1-20  alkyl, cyano (C 1-5 )alkyl, C 1-5  alkenyl, C 1-5  alkynyl, or phenyl (C 1-5 ) alkyl group wherein the benzene ring is optionally substituted by one or more identical or different C 1-5  alkyl groups, one or more nitro groups and/or one or more identical or different halogen atoms, and in which R 2  is a C 1-20  alkyl, cyano (C 1-5 ) alkyl, C 1-5  alkenyl, C 1-5  alkynyl or phenyl (C 1-5 ) alkyl group wherein the benzene ring is optionally substituted by one or more identical or different C 1-5  alkyl groups, one or more nitro groups and/or one or more identical or different halogen atoms; or wherein M is a 3-6 membered heterocyclic group containing nitrogen as a heteroatom and optionally one or more further heteroatoms, the aforesaid heterocyclic group being bonded to the remainder of the isothiourea molecule by the said nitrogen heteroatom thereof; wherein X is a hydrogen atom, a halogen atom or a C 1-5  alkyl group; and wherein Y 1 , Y 2  and Y 3  are, each independently, a hydrogen atom, a nitro group, a halogen atom or a C 1-5  alkyl group, are prepared by reacting a thiourea of Formula (III) with a benzyl halide of Formula (IV) wherein Z is a halogen atom The preparation is preferably carried out in an inert solvent (e.g. MeOH, EtOH, THF, dioxane, DMSO or DMF) in the presence of a basic substance (e.g. NaOH, KOH, NaOMe, KOMe, NaOEt, Ca(OH) 2 ) generally using a molar ratio of base to benzyl halide to thiourea of 1-1À5: 1-2 : 1 respectively. The examples describe the preparation of many 1-(3<SP>1</SP>-pyridyl)-isothioureas which are effective against phyto-pathogenic bacteria or fungi or acarids.
Patent GB-318679-A (GB)
Title: Improvements in or relating to variable condensers and to radio receiving and the like apparatus incorporating variable condensers
Filed: 1928-06-12
Abstract: 318,679. Wyborn, E. J. June 12, 1928. Condensers of the variable type, for incorporation in a radio receiver or the like, comprise a preferably solid dielectric and, associated therewith, a plurality of relatively movable plates carried by insulating carrier members into which the plates are fixed, one of the carrier members forming part of the panel of the said radio receiver or the like. One face of each of the moulded insulating members 1, 2 carries a pair of brass plates 3, 4, which are either fixed during the moulding process, or subsequently by means of screws 3a, 4a. The adhesion may be reinforced by tags bent at right angles to the surface. The plates are shaped to leave a circular space 5 and a space 6, and the member 1 has a projection extending through the space 5 by an amount equal to the thickness of an annulus 7 forming the dielectric. A screwed rod 8 fixed in the member 1 extends through a hole in the member 2 and is connected to the plate 3 on the member 1 by a tongue 11. The plate 4 on the member 1 is connected to a pin 12 extending through a slot 13 in the member 2 to limit the travel of the member 1 to a half-turn, the rod 8 and pin 12 being connected by flexible conductors to the screws 3<a>, 4a or other terminals. The fixed member, Fig. 5, forming part of the panel 15 may be adapted to receive the fixed plates of a number of condensers in a radio receiver. The panel may have an earthed screen 16 having windows 17 through which a scale 18 may be viewed. The member 1 may be rotated directly or through friction or gear wheels 20.
Patent GB-389454-A (GB)
Title: Improvements in apparatus for concentrating solutions and acids
IPC: B01D1/00
Filed: 1931-06-12
Abstract: <PICT:0389454/III/1> In apparatus for concentrating solutions, acids, &c. comprising a number of bell seals l and trays h down which the liquid admitted by a pipe o trickles in countercurrent to a stream of furnace gases admitted from the flue b of a furnace a; the upper parts n of the bell seals l are recessed to form trays.
Patent GB-568818-A (GB)
Title: Improved process for the production of diolefins
IPC: C07C7/156
Filed: 1942-12-02
Abstract: Diolefines are separated from hydrocarbon mixtures by selective extraction with cuprous salts solubilized with pyridine or alkyl pyridines, e.g. picolines.  Butadiene, isoprene or piperylene may be separated from butenes or pentenes with solutions of pyridine-cuprous acetate or lactate, and particularly pyridine-cuprous sulphate complexes.  These can be prepared by adding cuprous oxide to aqueous solutions of pyridine and pyridine sulphate in absence of air. Optimum results are obtained with a solution 2N in cuprous content and of pH=4, the temperature of extraction being between -10 and +10 DEG  C.  Diolefines are recovered from the solutions by heating to about 70-80 DEG  C., by reducing the pressure, contacting with a higher or lower boiling hydrocarbon or stripping with an inert gas. Examples compare the solvent action of pyridine-cuprous acetate, lactate, and sulphate solutions on butadiene, isoprene, and piperylene with that of ammoniacal cuprous solutions, and describe the extraction of the diolefines from mixtures, e.g. with trimethylethylene, at temperatures of 0 and 10 DEG  C.  Desorption may be effected in two stages, impurities being flashed off in the first.  The effect of varying pH on the solvent action is also shown. Specification 540,209 is referred to.
Patent GB-1456604-A (GB)
Title: Electronic musical instruments
IPC: G10H5/00
Filed: 1974-04-19
Abstract: 1456604 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 19 April 1974 [19 April 1973 1 June 1973 14 June 1973] 17228/74 Heading G5J An electrophonic musical instrument in which tone generator frequency and formant filter characteristics are varied as a note progresses from attack through sustain to decay as described in Specification 1,442,063, is provided with two parallel channels which may be used to provide different footages. The instrument may be simply monophonic, having one circuit 13a, Fig. 4, but as described, five circuits are provided each assigned to one of the first five keys actuated by a key assigner 11. The two channels 131, 132 in circuit 13a operate as described in Specification. 1,442,063 with the addition of pitch control circuits 22a, 22b which determine the footages produced by the two channels. Circuits 22a, 22b are controlled by two pitch setters 21c, 21d which are in effect couplers. The key assigner, Fig. 7, comprises an array of circuits such as 27, 28, 29, 30a, 31, 32a, five for each key. When key 12c is actuated, transistors 27, 28 and 29 conduct. The reduced potential on line 26a indicates to the waveform generators of Fig. 4 that a key has been depressed, and closure of relay contact 32a connects the tone pitch signal derived from the voltage divider R, R, ... R to the VCOs 14a, 14b of Fig. 4. Transistor 31 is cut-off by conduction of 29 so that the other relays 30b-30e are not energized. If now another key is actuated, the corresponding transistor 27 in the section 11a associated with circuit 13a cannot turn on because of the reduced potential on line 26a, but since the transistor 31 is turned on by a small bias current through the unenergized relay 30a, the corresponding circuit in section 11b is turned on and so the newly operated key is assigned to the circuit 13b (not shown in Fig. 4). Further keys up to a total of five can be assigned.
Patent GB-399281-A (GB)
Title: Improvements in the production of alcohol free from fusel oil
IPC: B01D3/00
Filed: 1932-06-18
Abstract: In a process for obtaining dehydrated alcohol free from fusel oil from crude aqueous alcohol by contacting the crude spirit with dehydrating material capable of increasing the alcohol content of the spirit in the vapour phase to about 95 per cent, and driving off the alcohol face from fusel oil by distillation, the fusel oil is prevented from accumulating in the system by withdrawal from the distillation column or by removal from the residual liquid. The dehydrating agent employed is preferably a fatty acid salt or salts, e.g. potassium acetate as described in Specification 368,793 or mixtures of potassium and sodium acetates. and the apparatus described in the above Specification may be used.
Patent GB-250522-A (GB)
Title: Improved purification of iron
IPC: C21C1/02
Filed: 1925-07-06
Abstract: 250,522. Mathieson Alkali Works, (Assignees of Evans, G. S.). April 10, 1925, [Convention date]. Discharging.-In a process for desulphurizing and refining iron, molten iron is discharged continuously or periodically from a cupola or melting furnace into a bull ladle containing a pool of molten iron on the surface of which is maintained an alkaline refining slag, refined iron being withdrawn from the ladle independently of the discharge of molten iron from the furnace but in amounts as will maintain always a relatively large pool of iron in the ladle during the whole heat. Fig. 1 shows one form of apparatus in which the molten iron is discharged periodically from a cupola 1, the tapping hole 17 being stopped up until a substantial quantity of molten iron has collected in the bottom of the cupola, the slag collecting on the top of the iron passing off through the outlet 18. The tapping hole 17 is then opened and iron allowed to flow into the ladle 19, the refining agent being dumped into the cupola spout or directly Into the ladle. When slag begins to come out of the hole 17 the latter is stopped up and the cupola allowed to fill up again until slag passes off again through the aperture 18 when the operation is repeated. In a modification, Fig. 2, molten iron is withdrawn continuously through the tapping hole 20, the slag and impurities being skimmed off by a slag bridge 23, the metal flowing through the trap 22 into the ladle 21 and the slag through a spout 24. The refining material may be added to the molten iron flowing through the spout or dumped into the ladle.. Specifications 3072/83 and 232,963 are referred to.
Patent GB-1038175-A (GB)
Title: Process of and apparatus for the manufacture of sodium sulphate from viscose coagulation baths
IPC: C01D5/18
Filed: 1963-05-02
Abstract: <PICT:1038175/C1/1> Anhydrous Na2SO4 is recovered from a viscose coagulation bath by cooling the coagulation bath in a crystallizer by expansion under vacuum, allowing the water vapour produced to pass into an absorber in which it undergoes exothermic reaction with CH2SO4, passing the hot acid into a heat exchanger to which is supplied sodium sulphate decahydrate originating in the vacuum crystallizer, and thus dehydrating the hydrous salt.  Additional heat from a separate source may be supplied to the heat exchanger.  A viscose coagulation bath enters vacuum evaporator or crystallizer 1 by conduit 2 and is withdrawn therefrom, cooled and containing Na2SO410H2O, by conduit 3 opening into the casing of heat exchanger 4. Water vapour from 1 is withdrawn by conduit 5 into absorber 6 where it condenses and is absorbed by sulphuric acid introduced by conduit 7.  Sulphuric acid is continuously cycled in the circuit consisting of absorber 6, pump 8, serpentine 9 of exchanger 4 and conduit 7.  Concentrated H2SO4, e.g. at 66 DEG  B<\>ae, is introduced into the circuit by conduit 10 connected to conduit 7 and dilute acid may be removed by conduit 11 as necessary.  Sodium sulphate entering as the decahydrate into exchanger 4 is dehydrated therein and withdrawn by conduit 12.  Steam is removed from 4 by conduit 13 and condensed elsewhere. Additional heat if required may be supplied to 4 by means of auxiliary serpentine 15.
Patent GB-530012-A (GB)
Title: Floating toy
IPC: A63H23/06
Filed: 1939-06-14
Abstract: 530,012. Floating toy. HOLLDAMPF, H. A. June 14, 1939, No. 17385. [Class 132 (iii)] A floating toy 2 is propelled by the reactive force of air issuing from a bladder concealed inside the toy, the outflowing air being subjected to strong throttling by the insertion in the outlet 4 of a capillary tube or a piece of finely porous material such as spongy rubber. The latter insert may be terminated in an outwardly flaring tube which discharges the air into a guide channel 6. The inlet 20 and outlet 4 are arranged at the same end of the bladder The air displaced from the floating body on inflation of the bladder is released through a vent at some elevated point, which in the illustrated embodiment is the hollow flagstaff 23. Reference has been directed by the Comptroller to Specifications 167,221, [Class 132 (iii)], and 417,317.
Patent GB-1072693-A (GB)
Title: Aqueous dispersions of acrylamide copolymers freed from monomeric acrylamide
Inventor: CORRY ALFRED REGINALD
IPC: C08F6/00
Filed: 1963-05-02
Abstract: Aqueous dispersions of water-insoluble acrylamide copolymers are freed from residual monomeric acrylamide by adding ammonia or a primary or secondary amine, in an amount of at least 1 mole per mole of monomeric acrylamide, to the dispersion and allowing reaction to proceed until substantially all the free monomeric acrylamide has reacted.  The acrylamide copolymer may contain as the comonomer component(s) one or more of the following:-styrene and its substituted derivatives, e.g. vinyl toluene, acrylic and methacrylic esters, vinyl and vinylidene chloride, acrylonitrile and vinyl esters.  Amine reactants specified are methyl-, ethyl-, n-propyl-, isopropyl-, n-butyl-, isobutyl-, monoethanol-, diethanol-, cyclohexyl- and benzyl-amine, and morpholine.
Patent GB-545812-A (GB)
Title: Improvements in or relating to the manufacture of hot and cold water soluble cellulose ethers
IPC: C08B11/20
Filed: 1940-12-11
Abstract: 545,812. Cellulose ethers. HOUGHTON, A. A., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Dec. 11, 1940, No. 17542. [Class 2 (ii)] Cellulose hydroxyalkyl ethers or salts of cellulose hydroxycarboxylic acids which are soluble in both hot and cold water but insoluble in methyl or ethyl alcohol are obtained by etherification of cellulose with etherifying agents having reactive chlorine atoms, in presence of aqueous sodium hydroxide. The alkaline reaction mixture containing the fibrous cellulose ether is approximately neutralized, or acidified insufficiently to insolubilise the cellulose ether in water, with an acid having a sodium salt freely soluble in aqueous ethyl or methyl alcohol, or an ammonium salt of such an acid. If the neutralized reaction mixture is not already unsaturated with respect to sodium chloride it is rendered so by addition of water, sufficient alcohol being present to maintain the fibrous form of the cellulose ether. The liquid content of the mixture is then reduced by pressure, and the fibrous residue is purified by alternate admixture with aqueous alcoholic media and expression of liquors, the alcoholic content of the media being so chosen that the expressed liquors are not saturated with respect to sodium chloride but maintain the fibrous condition of the cellulose ether. The process is applicable to the isolation of water soluble salts of cellulose hydroxycarboxylic acids or water soluble hydroxyalkyl celluloses. The loss bf salts which occurs at each pressing necessitates the use of media stronger in alcohol at the later stages of the isolation. For neutralizing at least part of the caustic soda there may be used hydrochloric acid, ammonium chloride, or inorganic or organic acids, or ammonium salts thereof, having sodium salts more freely soluble in aqueous alcohol than sodium chloride e.g. nitric, acetic, propionic, chloracetic, formic, citric, tartaric, or oxalic acid, or phthalic anhydride, or ammonium salts of these. Neutralization may be carried out by adding an aqueous alcoholic solution of the acid or ammonium salt. Expression of the aqueous alcoholic liquors from the fibrous cellulose ether may be effected by a mechanical press or by a centrifuge. In an example, sulphite wood-pulp is shredded and mixed with a mixture of caustic soda, water and alcohol. A solution of sodium chloracetate is added and the mixing is continued. The mixture is placed in bins and the temperature is allowed to rise to about 60‹C. in three hours time. It is kept warm for several hours. A mixture of'acetic acid, water and alcohol is then added to neutralise the reaction mass. The cellulose ether is pressed and then mixed with water and alcohol and again pressed. The extraction is repeated. In other examples, the neutralization is effected with nitric acid or the mixture is brought nearly to neutral by nitric acid and then acetic acid is added until the mixture is just acid.
Patent GB-182138-A (GB)
Title: Improvements in imitation jewelry and like ornamental objects
IPC: A44C17/00
Filed: 1922-06-26
Abstract: 182,138. Kolßr, B. June 25, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Ornamenting. - Transparent, translucent, and like objects are combined with a substance capable of absorbing and reemitting luminous energy whereby the objects are made to sparkle like precious stones. The luminous substance may be combined with the material of the object when this is being melted or crystallized. Or the luminous substance may be applied as a coating or filling and may be combined with substances resisting deteriorating influences or may be covered over with such substances. The covering substances may be melted, or may contain constituents some of which evaporate, or may be of such a nature as to solidify slowly. For example, the luminous substance may be worked into porous unfinished articles before they are glazed, such as porcelain, or into surface cracks produced by rapid cooling. Glass prisms, rings, knobs, pin-heads, studs, and the like may be ornamented by internal or external applications of such luminous substances alone or alternated or backed with other materials, such as metallic reflectors. As shown in Figs. 25 and 26, a stone i is placed over a mirror z, surrounded by a luminous layer s.