baber/WOPTO huggingface dataset:
Patent GB-1089412-A (GB)
Title: Reprographic apparatus
Inventor: LAWES LOUIS FREDERICK WILLIAM
IPC: G03G15/08
Filed: 1965-06-02
Abstract: 1,089,412. Developing electro-static images. ARLSIDE Ltd. May 25, 1966 [June 2, 1965], No.23539/65. Heading G2H. In a cascade developing apparatus an electrostatic latent image on a drum 1 is developed by developer discharged from a hopper 10 under the control of a shutter 12 opened by an electromagnet 11 against the action of a spring (36) Fig. 4 (not shown). A rotary elevator (7), driven by a shaft 8 has spaced apart scoops (9) which return unused developer to the hopper 10, Fig. 1. A spreader 16, which may be a screw oppositely threaded from its centre outwards, distributes developer across a plate 15. A device 17 dispenses toner to replenish that used in development. The device may have an agitator (20) Fig. 3 (not shown) above a dimpled metering roller (19) and a brush (22) which produces a cloud of powder (24).
Patent GB-168238-A (GB)
Title: Improvements in and relating to electric resistance devices
IPC: H01C7/04
Filed: 1920-08-11
Abstract: 168,238. British Thomson - Houston Co., Ltd., (General Electric Co.). Aug. 11, 1920. Powdered and granular resistances, particularly of the kind having a negative temperature, characteristic, have a metallic shell and a metallic core with a layer of powdered or granular material between. In the construction shown in Figs. 1 and 2, an iron tube 1 is provided with an iron core 2, between which is a layer of copper oxide or other like material 3. The tube is rolled or swaged to compress the resistance and a portion may be cut away as shown so that the two sections of resistance are in series when the tube is placed in terminals 4, 5. The device may be employed as a starting resistance for a motor.
Patent GB-437549-A (GB)
Title: Improvements in or relating to electric discharge devices
IPC: H01J5/46
Filed: 1934-08-15
Abstract: 437,549. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Patent - Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) Aug. 15, 1934, No. 23543. [Class 39 (i)] In discharge devices such as high - pressure metal - vapour lamps wherein the lead - in wires become so hot as to be liable to oxidation, these leads 9 are carried through an auxiliary vessel 8 which is evacuated or filled with a neutral gas, one wall of this vessel being formed by the end of the main envelope 1. A flexible part 26 is included in each lead or the stud 12, Fig. 2, to which the lead 9 is attached may have a flexible mounting 18. Specifications 21574/13, 187,992, [both in Class 39 (i)], and 363,775, [Group XI], are referred to.
Patent GB-154749-A (GB)
Title: Improvements in means for guiding and clearing yarns and threads of cotton and like material in winding machines
IPC: B65H63/06
Filed: 1919-09-25
Abstract: 154,749. Stapleton, F. W. Sept. 25, 1919. Clearing-apparatus. -The pins of a guide of the type comprising pins spaced so as to form a comb for guiding and clearing yarns and threads in winding- machines are of round section and parallel where the yarn passes and are flattened as shown at A1, Fig. 1, and pointed, so that when a lump attempts to pass between the pins it is flattened and is caught by the sharp corners of the flattened portions and the yarn is broken. The pins are mounted in a holder, which may be cast around the pins or may comprise two grooved plates clamped together, and is mounted in a carrier C, provided with projections F, Fig. 2, to prevent the yarn from being passed other than through the comb and with pot or steel rollers E for guiding the yarn through the comb.
Patent GB-635974-A (GB)
Title: Improvements in or relating to means for producing pulses of ultra-short waves
IPC: H03K3/78
Filed: 1946-08-09
Abstract: 635,974. Pulsing carrier frequencies. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Aug. 9, 1946, No. 23718. Convention date, June 9, 1944. [Class 40 (v)] [Also in Group XL (b)] Ultra high-frequency energy is stored in a section of a wave-guide and emitted as short pulses by detuning a lateral resonator which produces zero reactance across the guide at resonance. As shown, a source S of ultra highfrequency energy feeds a guide G connected to a horn C through an apertured diaphragm and wave-guide sections G1, G2. The sections G1, G2 are separated by a virtual reflecting wall caused by a lateral resonator R coupled to the guide, and the section G1 forms a resonator at the frequency of the source S. When the resonator G1 is fully charged, the lateral resonator R is detuned by firing a gas-discharge tube T. This removes the virtual reflecting wall between G1 and G2 and allows the energy stored as standing waves in G1 to be emitted as a short pulse from the horn C.
Patent GB-924323-A (GB)
Title: ª ,ª -(dibromo-phenylene-dioxy)dialkanols and polyesters thereof
IPC: C08G63/682
Filed: 1961-06-30
Abstract: Flame-retarding polyester resinous compositions are obtained by esterification of dialkanols of the formula <FORM:0924323/IV(a)/1> wherein R is hydrogen or an alkyl group having 1 to 4 carbon atoms (see Group IV(b)).  Part of the dialkanol may be replaced by another polyhydric alcohol and several suitable glycols are specified. Representative of the carboxylic acids specified for use in ester formation are maleic, fumaric, aconitic, itaconic, phthalic, succinic and linoleic acids.  Cross-linking monomers specified for use in the compositions include styrene optionally with alkyl and halogen substituents on the ring or side chain, esters of olefinic monocarboxylic acids, vinyl esters, allyl esters and triallyl cyanurate.  Curing agents specified for use in the compositions include benzoyl and methyl ethyl ketone peroxides and tertiary butyl hydroperoxide.  Promoters specified include cobalt naphthenate, diethyl aniline and mercaptans.  Examples are furnished.ALSO:The invention comprises a dialkanol of the formula <FORM:0924323/IV(a)/1> wherein R is hydrogen or an alkyl group having 1 to 4 carbon atoms. b ,b 1-(4,6-dibromo-1,3-phenylenedioxy) diethanol is prepared by the bromination of 1,3-bis(b -hydroxyethoxy) benzene which is obtained by reacting ethylene oxide or ethylene chlorohydrin with resorcinol. Other compounds of the above general formula may be produced similarly using the oxides or chlorohydrins of propene-1, butene-1, pentene-1 and hexene-1.  The dialkanols of the invention are converted to unsaturated polyesters which may be polymerized with a cross linking monomer (see Group IV(a)).  Various saturated and unsaturated acids are specified for use in ester preparation including maleic, phthalic, succinic and the corresponding anhydrides may be employed where available.  Examples are furnished.
Patent GB-226137-A (GB)
Title: Improved means for increasing small differences of fluid pressure
IPC: G01L19/00
Filed: 1923-09-20
Abstract: 226,137. W³nsch, G., and Askania- Werke Akt.-Ges. vorm. Centralwerkstatt-Dessau und C. Bamberg-Friedenau. Sept. 20, 1923. Pneumatic relays. - Apparatus for transmitting and increasing small differences of fluid pressure for purposes of measurement or of effecting movement comprises a pipe 44 to which the pressure difference is transmitted, e.g. by means of a rod 43 connected to a diaphragm 42 subject to the pressures, and which conveys a fluid under pressure. The pipe is moved by the variations of pressure differences so that its outlet nozzle is brought more or less nearly opposite the inlet opening 47 of a cylinder 48, the piston of which causes the return movement of the pipe until the pressure in the cylinder becomes proportional to the pressure difference. The return movement may be effected through a lever 50 having an adjustable pivot 51, and connected at its ends with the piston and with a rod 52 secured to the pipe. Specification 224,655 is referred to.
Patent GB-467259-A (GB)
Title: Improvements in and relating to welding electrodes
IPC: C22C9/00
Filed: 1935-09-09
Abstract: Welding-electrodes are made of a copper alloy containing at least 0,5 per cent each of cadmium and silver and the balance copper which has been completely deoxidized by phosphorus or silicon, the alloy having been cold rolled after annealing at 600-700 DEG  C.  A residue of phosphorus may be present up to 0,05 per cent of the amount of copper.  The proportions of cadmium and silver are preferably about equal, and their sum preferably 2-10 per cent.
Patent GB-1034879-A (GB)
Title: Lower alkoxy pyridyl acetones
IPC: C07D213/65
Filed: 1965-06-03
Abstract: The invention comprises (3-lower alkoxy-2-pyridyl)-acetones and their preparation by treating 3-lower alkoxy-2-methylpyridine with n-butyl lithium in the presence of an inert solvent such as absolute ether or dry hexane, under an inert atmosphere, adding acetonitrile and acidifying with an aqueous acid solution, treating the aqueous phase of the mixture with an alkali metal hydroxide and methylene chloride, separating the aqueous phase from said mixture and recovering the acetone product from the organic phase.  The products of said process may be converted to (3-lower alkoxy-2-piperidyl) acetone by selective reduction of the pyridino ring with hydrogen over rhodium catalyst in acidic solution.  The latter compounds are useful for preparing antimalarial quinazolones.  The examples describe the preparation of (3-methoxy-2-pyridyl)-acetone, (3-ethoxy - 2 - pyridyl) - acetone, (3 - methoxy - 2-piperidyl) - acetone, (3 - ethoxy - 2 - piperidyl)-acetone.  2 - Lithomethyl - 3 - methoxy pyridine is prepared as in the first stage of the above process in solution, for example, in hexane.
Patent GB-1017662-A (GB)
Title: Improvements in and relating to sensitive weighing apparatus
Inventor: BRADFIELD GEOFFREY
IPC: G01G3/00
Filed: 1961-06-30
Abstract: 1,017,662. Measuring weight electrically. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 1, 1962 [June 30, 1961], No. 23820/61. Heading G1N. A load cell for measuring e.g. weight, comprises a block of quartz crystal 14 with a thin longitudinal slot 11 parallel to the larger sides, the surface 15 exposed by the slot being silver plated to produce a capacitance which varies with force applied at the centres 18 of the larger sides by polished sapphire applicators 18. The capacity change may be measured in a bridge circuit by comparison with a similar unstressed crystal, or in a beat frequency arrangement. The crystal block is cut so that its temperature coefficient is a minimum, and is supported on its neutral bending plane by sapphire needles 16 in depressions 17. The relative movement between the upper and lower parts may alternatively be measured by a differential inductance.
Patent GB-1256416-A (GB)
Title: RECOVERY OF alpha-AMINO-epsilon-CAPROLACTAM MONOHYDROCHLORIDE OF ENHANCED OPTICAL PURITY
IPC: C07D223/12
Filed: 1969-05-09
Abstract: 1,256,416. Aminocaprolactam hydrochloride; lysine. STAMICARBON N.V. 9 May, 1969 [14 May, 1968], No. 23827/69. Heading C2C. α - Amino - # - caprolactam monohydrochloride of enhanced optical purity is obtained from the relatively optically impure salt by (1) subjecting the relatively impure monohydrochloride to fractional crystallization arid recovering the pure salt as crystals or (2) subjecting the impure monohydrochloride to extraction with a solvent whereby the pure salt remains as a solid after extraction. Specified solvents for both processes are water and aqueous ethanol and methanol. Crystallization and extraction are conducted at 15-65‹ C. when water is used. Examples describe the recovery of the pure L- and D-salts. The L-salt may be hydrolysed to L-lysine.
Patent GB-667051-A (GB)
Title: Improvements in or relating to self-tapping screws
Inventor: BLICK ELI
IPC: F16B25/00
Filed: 1949-09-16
Abstract: 667,051. Self - tapping screws. G.K.N. GROUP SERVICES, Ltd. Sept. 15, 1950 [Sept. 16, 1949], No. 23884/49. Class 83 (iii). A self-tapping screw comprises a head 10, a shank 11 having an entering end portion 15 of plain truncated conical form, a screwthread 13 extending from the larger end of the portion 15 to or near the head 10, and one or more grooves 16 extending longitudinally or helically for the full length of the threaded part and intersecting the thread so that one side 18 of each groove constitutes a tapping surface and, as shown in Fig. 2, is disposed approximately radially to the axis of the screw. The inclination of the side 18 from a true radius may be up to 5 degrees in a direction opposite to the direction of rotation of the screw. The side 19 of the groove is backed off or curved away from the radial side. The thread 13 may extend partly along the end portion 15, and the depth of the grooves 16 may be equal to.or slightly greater than that of the thread groove. The thread 13 may be formed by rolling, and the groove or grooves 16 by relative axial movement between the screw and a tool having one or more cutters disposed radially around the axis of the screw.
Patent GB-980944-A (GB)
Title: Klystrons
IPC: H01J25/24
Filed: 1960-07-08
Abstract: 980,944. Reflex klystrons. SPERRY RAND CORPORATION. July 8, 1960 [July 21, 1959], No. 23891/60. Heading H1D. A klystron comprises a housing 9, 58 containing a resonant cavity 7 having two parallel grids 16, 17 and a reflector electrode 8, a rigid column 54, 56 connected at one end to one, 16, of the grids and extending along the electron beam axis, and actuating means connected to the column for imparting axial movement thereto whereby the grid 16 is moved and the cavity tuned, the housing having as a part thereof means 59, 62, 63 for applying an adjustable pressure axially to the rigid column to resist tuning movement thereof in one sense. The actuating means has a tuning screw 36, an actuating nut 37 and a forked input lever 34 connected through a movable bearing 51 to a forked output lever 35 operating on the rigid column 54, 56, the movable bearing providing a non-linear movement of the output lever with respect to that of the input lever, the non- linearity being such as to compensate for the non-linearity in frequency of the cavity resonance with respect to movement of the movable grid 16. The means for applying adjustable axial pressure to the rigid column 54, 56 comprises an axially extending screw 62 having direct or indirect threaded engagement with a resilient member 59, the screw 62 engaging with a spacer bar 63 bearing on the threaded rod 56. The tubular member 54 engaging with the rod 56 can be adjusted through a slot 57 to adjust the effective length of the column 54, 56. The member 59 is attached by bolts 61 to a circular plate 29 engaging with the input lever 34 by balls 32, 33 supported in an annular V-groove 31 in the plate. A spring 64 is located between the plate 29 and a flange 65 attached to the rod 56. The screw 62 can be turned downwards so far as to lock the tuning assembly 36 &c., or can be adjusted to a position where the column assembly 54, 56 is firmly held while still permitting a low torque servomotor to turn the tuning screw 36. A modification is described in which the tuning screw is coaxial with the rigid column assembly.
Patent GB-1218869-A (GB)
Title: Dehydrohalogenation process
Inventor: CRARY JAMES WALTER
IPC: C07C17/25
Filed: 1968-05-20
Abstract: 1,218,869. Dehydrohalogenation of halogencontaining hydrocarbons. E. I. DU PONT DE NEMOURS & CO. 20 May, 1968 [19 May, 1967], No. 23980/68. Heading C2C. [Also in Division C5] Halogen-containing aliphatic or alicyclic hydrocarbons are dehydrohalogenated to give products which themselves contain halogen (e.g. chloroprene and 2,3-dichlorobuta-1,3-diene) by reaction in the presence of a catalyst with an alkali metal hydroxide, generally NaOH, in an aqueous medium, the hydroxide being in an initial concentration of at least 30% and not more than 60% and in stoichiometric excess sufficient to be able to react with all the starting material and still leave a final concentration of at least 25%, calculated with respect to the weight of hydroxide and water only. The catalyst may be, e.g. a quaternary ammonium compound or a polyethylene glycol or other alcohol or ether-alcohol. The reaction temperature is generally 40-70‹ C. In the examples, chloroprene is prepared from 3,4-dichlorobut-1-ene using phenothiazine as a polymerization inhibitor. It is stated that 2,3- dichlorobutadiene-1,3 may be prepared from 2,3,4-trichlorobutene-1 or 1,2,3,4-tetrachlorobutane. Other specified starting materials include di-, tri-, tetra- and penta-chloroethane and tetrachlorobutene.
Patent GB-904351-A (GB)
Title: Vascular positioning device
IPC: A61B17/11
Filed: 1960-07-08
Abstract: 904,351. Turning inside out. NATIONAL RESEARCH COUNCIL. July 8, 1960 [Sept. 14, 1959], No. 23991/60. Class 112. [Also in Group VI] A device for everting the cut end of a blood vessel over a suturing apparatus bushing 1 through which the blood vessel is passed, comprises a cylinder 7 having a closed end and an open end, a piston 11 and piston-rod 15 reciprocable within the cylinder, a nozzle 12 projecting from the piston through the open end of the cylinder when the piston is in forward position, a passage connecting the nozzle with the cylinder interior by way of the piston, means for admitting fluid under pressure into the cylinder and a flexible collar 25 seated on the nozzle and extending outwardly to the open edge of the cylinder where it is secured by a peripheral rib 29. In use, the cut end of the blood vessel in a clamp 3 is applied to one side of the bushing through which it is drawn by a flexible suction tube (not shown) applied to the other side of the bushing. With the piston retained in forward position by finger pressure on a screw 18 at the rear end of the piston-rod, the nozzle 12 is inserted in the blood vessel and fluid under pressure, e.g. gas or saline solution, is admitted to the cylinder through a passage 22 in a tube 21 attached to the cylinder, and thence to the nozzle and the blood vessel so that the latter expands over the nozzle and a portion of the collar 25. The cylinder is then moved by hand forwardly over the piston, thus folding the collar and the cut end of the blood vessel over the bushing. The collar is torn away and discarded when the suturing operation has been completed. Specification 840,920 is referred to
Patent GB-1114304-A (GB)
Title: Method and device for forming a hollow plastic article
IPC: B29C49/02
Filed: 1965-06-04
Abstract: 1,114,304. Blow moulding hollow article with thickened wall portions. AMERICAN CAN CO. 4 June, 1965 [12 June, 1964], No. 24025/68. Heading B5A. A thermoplastic parison is formed on a hollow core rod, introduced into a mould and inflated to form a hollow article, the parison having thickened wall zones at locations which correspond to the parting surfaces of the mould. Three grooved hollow core rods 12 are mounted on a rotatable turret 10. At station A mould sections 13 are closed around the core rod and thermoplastic material is injected into the moulding cavity to form a tubular parison having ribs 24 formed in the grooves 23 of the core rod, at positions corresponding to the parting lines of the mould sections. At station B the parison is isolated between mould halves 18 by air pressure entering the parison from the bore of the core rod from a source (not shown). The hollow article so formed has thickened ribs 24. At station C the finished article is ejected by blowing or by mechanical stripping.
Patent GB-651445-A (GB)
Title: Improvements relating to the preparation of di-acid bases
Inventor: COPP FREDERICK CHARLES
Filed: 1948-09-14
Abstract: Bases of the formula <FORM:0651445/IV (b)/1> where R1 and R2 are hydrogen, alkyl or alkenyl, or form a ring with the nitrogen atom, A and B are alkyl, aryl or aralkyl, and C and/or D or any aromatic rings in A and/or B may contain alkyl or alkoxy substituents (other than an alkyl group ortho to the methylene group), are obtained from ketones <FORM:0651445/IV (b)/2> by known methods.  Specified methods are (1) conversion into oximes or hydrazones, followed by catalytic reduction, preferably in the presence of ammonia; (2) catalytic reduction in the presence of ammonia; (3) catalytic reduction in the presence of a primary or secondary amine (not suitable when A and/or B is aryl); (4) reduction to the dicarbinols, treatment with hydrogen bromide to give the dibromides and reaction of these with ammonia or a primary or secondary amine (not suitable when A and/or B is aralkyl).  In the case of (1) and (2) compounds are formed where R1 and R2 are both hydrogen, and in these and other cases, the free hydrogen atoms attached to the nitrogen atoms may be replaced by alkyl groups, e.g. by treatment with formic acid and formaldehyde. The bases may be converted into salts with acids, e.g. hydrochloric, but the formation of quaternary salts is p  covered by Specification 651,433.  Examples are given of various methods for obtaining the products, including purification via the picrate.  The preparation of the dioximes of the following substituted diphenyl ethers is described: 4 : 41-dipropionyl-, 4 : 4-dibutyryl0, 4 : 41-divaleryl-, 4 : 41-dicaproyl-, 4 : 41-diheptoyl-, 4 : 41-dioctanoyl-, 4 : 41-di-p-toluyl-, 2-methoxy-41 : 5-diacetyl-, 2 : 21-dimethoxy-5 : 51-diacetyl- and 2 : 21-dimethoxy-5 : 51-di-phenylacetyl-, and also the dihydrazone of 4 : 41-diacetyl-diphenyl ether.  Diacyl-diphenyl ethers are obtained by condensing diphenyl ether (or alkyl or alkoxy substitution derivatives thereof) with acyl chlorides in the presence of aluminium chloride.  The following substituted diphenyl ethers are mentioned: 4 : 41-dipropionyl-, 4 : 41-dibutyryl-, 4 : - divaleryl-, 4 : 41 - dicaproyl-, 4 : 41 - diheptoyl-, 4 : 41-dioctanoyl-, 4 : 41-di-p-toluyl-, 4 : 41 - di - phenylacetyl-, 2 - methoxy - 41 : 5 - dibenzoyl-, 2 : 21 - dimethoxy - 5 : 51 - diacetyl-, and 2 : 21 - dimethoxy - 5 : 51 - di - phenylacetyl.  Dicarbinols of the formula <FORM:0651445/IV (b)/3> where A, B, C and D are defined above, are obtained by reduction of the corresponding diketones.  The preparation of 4 : 41-bis-(a -hydroxyethyl)-diphenyl ether and 4 : 41-bis-(a -hydroxy-hexyl)-diphenyl ether is described.
Patent GB-357945-A (GB)
Title: Improvements in or relating to air vents for show cases and the like
IPC: A47F3/00
Filed: 1930-06-14
Abstract: 357,945. Showcases &c. ANSELL, A., 29, Effingham Road, Surbiton, Surrey. June 14, 1930, No. 24168/31. Divided on 18289/30. [Class 52 (i).] Glass showcases or covers are provided with air vents consisting of a metal or other casing f holding a perforated screen and fitted externally with a rubber or cork band 61 to form a seating in an aperture in the glass b.