baber/WOPTO huggingface dataset:
Patent GB-265141-A (GB)
Title: Process for the production of persulphuric acid and its soluble salts from sulphuricacid by electrolysis
IPC: C25B1/28
Filed: 1926-10-27
Abstract: 265,141. Oesterreichische Chemische Werke Ges. Jan. 28, 1926, [Convention date]. Persulphuric acid and its soluble salts, obtaining.-A current strength of over 200 amps. per litre of anolyte is employed. In an example, a solution containing 500 grams H2 SO4, per litre is electrolysed in a diaphragm cell having a platinum anode and a lead cathode at a temperature of 20-21‹ with a current strength of 400 amps per litre. The diaphragm may be of porcelain or of a combination of fabrics with artificial resin, or of " gurocel," i.e. a composition of diatomacea slightly burned with suitable binding agents. For the production of salts the electrolyte may contain 20 per cent ammonium sulphate, 2 per cent sulphuric acid, and 7.5 per cent potassium sulphate, the temperature being 30-35‹ C. The solution is cooled after withdrawal from the cell for separation of the salts.
Patent GB-1320590-A (GB)
Title: Gas-discharge lamps
IPC: H01J61/20
Filed: 1971-04-19
Abstract: 1320590 Amalgam composition SPETSIALNOE KONSTRUKTORSKO-TEKHNOLOGICHESKOE BJURO ISTOCHNIKOV SVETA 19 April 1971 [25 May 1970] 27042/71 Heading C7A [Also in Division H1] An amalgam contained in a low-pressure mercury-vapour discharge lamp comprises: mercury 15-20 atoms per cent, lead 45-75 per cent, and bismuth 5-40 atoms per cent. The amalgam has a melting point in the range 200- 220 C.
Patent GB-418327-A (GB)
Title: Improvements in and relating to elastic fluid generators
IPC: F22B3/02
Filed: 1933-10-02
Abstract: 418,327. Mercury-vapour generators. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Coulson, B. P. ; 11, North Church Street, Schenectady, New York, U.S.A.) Oct. 2, 1933, No. 27058. Convention date, Oct. 1, 1932. [Class 122 (iii).] A mercury vapour generator for use in a mercury-steam turbine power plant comprises drums 10 and primary and secondary liquid preheating and evaporating elements 21 consisting of horizontal headers connected by longitudinal tubes. The drums are connected by liquid-equalizing pipes, means are provided for separating the liquid and vapour in the secondary elements, and liquid pools are provided in connecting pipes to act as liquid seals. The drums 10 are provided with filling blocks and tubes 13 as described in Specification 319,220, [Class 122 (iii)]. The liquid equalizing pipes 16 are connected to the drums at points above the cold liquid level and below the hot liquid level. The pipes are arranged at a slight inclination to ensure absence of mercury when cold. Two units 21 are arranged between adjacent drums. These comprise primary parts 22 and secondary parts 23 with lower and upper headers 24, 25, 27, 28 respectively connected by pipes of large and small diameter. The headers 24 are connected by pipes 31 to a liquid-supply header 33. One of the large vertical tubes at the front end of the secondary part of each unit is connected to a device 36, Fig. 3, for separating the liquid from the vapour. The vapour passes to a consumer from the pipe 37. The device permits a rise of the liquid level in the secondary unit during the operation of the generator. At starting only a small quantity of liquid escapes passing through the aperture 44 in the bottom of the inner tube 43 to the drums by way of pipe 38. When the mercury rises outside the tube owing to expansion, it finally passes by way of V-notches 45 to the drums. The upper headers of the primary units are connected by small pipes 49 to intermediate parts of the tubes 34 down which the mercury normally flows to empty the headers when the generator is shut down. The mercury supply conduits 32 are connected by pipes 48 to equalize the supply to the heating units at starting. During operation, the expansion of the liquid causes the level in the secondary parts to rise until the units are substantially filled. The units preheat the turbine-exhaust condensate and supply it to the drums. The pools 20, Fig. 3, prevent wear of the piping and constitute a vapour seal between the drums and heating unit at starting.
Patent GB-1514042-A (GB)
Title: Acidic cation exchange fibre
IPC: B01J47/12
Filed: 1976-06-29
Abstract: 1514042 Sulphonating fibrous polyethylene SUMITOMO CHEMICAL CO Ltd 29 June 1976 27062/76 Heading C3L Acidic cation exchange fibres are obtained by sulphonating fibrous polyethylene with gaseous sulphur trioxide in admixture with an inert gas, e.g. nitrogen, in a reactor which is rotated to effect agitation of the fibres.
Patent GB-670575-A (GB)
Title: Improvements relating to viewing screens or lenses for optical projection systems
Inventor: HOLMAN HERBERT EDWARD
IPC: G03B21/60
Filed: 1947-10-09
Abstract: 670,575. Optical apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 8, 1948 [Oct. 9, 1947], No. 27094/47. Class 97 (i). A viewing screen or lens for optical projection systems comprises several rigid sections arranged edge to edge, the sections being each formed with light refracting grooves or indentations and being secured together with the aid of complementary projections and recesses provided respectively on adjacent edges of the sections, each projection fitting into a corresponding recess. As shown, the screen is built up of squareshaped sections, two adjacent edges of each of which have dovetail projections 4 whilst the other two edges have dovetail grooves 5 therein in which the projections 4 of another section fit. Preferably, a cement having the same refractive index as the material of the sections is used between the surfaces of the co-operating projections and grooves. The sections are made from a transponent or translucent synthetic resin as by moulding and the rear surface of each section may be metallized. Mutually perpendicular grooves 3 are formed on one or both surfaces of the sections, and the grooves on each section may have side faces of different inclination as described in copending Specification 670,605. The Provisional Specification describes also an arrangement for maintaining the screen dustfree and comprising two metal meshes, one of which is connected to the positive terminal of a high voltage source and the other to the negative terminal thereof so that a potential difference is established between the meshes.
Patent GB-1514805-A (GB)
Title: Photographic silver halide developer compositions
IPC: G03C5/42
Filed: 1975-06-26
Abstract: 1514805 Developers containing ruthenium complexes EASTMAN KODAK CO 26 June 1975 [26 June 1974 9 Sept 1974] 27127/75 Heading G2C A photographic silver halide developing composition contains at least one silver halide developing agent, and a ruthenium (III) or ruthenium (II) cationic complex wherein all or a majority of the co-ordinating atoms are nitrogen atoms of amine or ammine ligands, each developing agent exhibiting in the absence of other developing agents and the ruthenium complex a silver halide development induction period of at least five seconds and at least one developing agent exhibiting a rate of reduction of ruthenium (III) in said ruthenium III complex or produced by oxidation of said ruthenium (II) complex greater than its rate of reduction of silver halide in the absence of the ruthenium complex. The invention also includes a method of increasing the developing activity of a photographic developing composition whereof each silver halide developing agent is polyhydroxybenzene, ascorbic acid, hydroxylamine, hydroxyurea or pyrimidine developing agent which comprises incorporating in the composition a development accelerating amount of at least one ruthenium (II) or ruthenium (III) cationic complex wherein all or a majority of the co-ordinating atoms are nitrogen atoms of amine or ammine ligands. The ruthenium complex acts as a catalyst for silver halide by forming a redox couple between the developing agent and the silver halide. Ligands in the ruthenium complexes include acyclic aliphatic amines, e.g. comprising alkyl, alkylene and alkanonal moieties. Examples are ammonia, ethylene diamine, triethylene diamine, alkyl tetramines, pyridine, morpholine, pyrrole, pyrazole, pyrazine, pyrazoline, oxazole and thiazole. The complexes may contain 1 or 2 monodentate ligands such as water, halogen, thiocyanate, methylcarboxylato, isonicotinamido. Suitable anions are listed. Developing agents are also listed. With hydroquinone a carbonylbisulphite-amine condensation product is preferably present, amines for their preparation being given. The effect of the complexes with developing agents having the specified induction period and with others, not according to the invention, is illustrated.
Patent GB-926286-A (GB)
Title: Improvements in or relating to apparatus for making hollow objects of organic plastic material
IPC: B65D1/02
Filed: 1960-08-05
Abstract: 926,286. Plastic containers. E. I. VALYI. Aug. 5, 1960 [Nov. 3, 1959], No. 27167/60. Class 66. [Also in Group V] A blow-moulded (see Group V) bottle of e.g. polythene may have a recessed bottom, Fig. 25. Alternatively the bottle may be as shown in Fig. 23, or of outwardly tapering bi-conical form, Fig. 32 (not shown).
Patent GB-441223-A (GB)
Title: Improvements in or relating to the production of precipitated calcium carbonate
IPC: C01F11/18
Filed: 1934-09-22
Abstract: Precipitated calcium carbonate and ammonium nitrate are obtained from impure limestone, ammonia, and nitric acid by first dissolving the limestone in nitric acid, purifying the solution of calcium nitrate obtained, reacting the pure solution with ammonium carbonate, removing the precipitated carbonate and evaporating the remaining solution of ammonium nitrate.  The ammonium carbonate solution may be obtained by collecting the carbon dioxide evolved in the first step of the process in an aqueous solution of ammonia.
Patent GB-852793-A (GB)
Title: Improvements relating to the design and construction of jigs and fixtures
Inventor: WHARTON JOHN
IPC: B23Q1/01
Filed: 1958-08-26
Abstract: 852,793. Work-holders. WHARTON & WILCOCKS Ltd. July 13, 1959 [Aug. 26, 1958], No. 27313/58. Class 83 (3). The angle-setting unit as described in Specification 587,448, having a base and body secured together by a bolt, comprises additional means, other than the bolt, for securing the body in the required angular position. A body 2 is angularly adjustable about a base 1 and is clamped in the adjusted position by clamps 3 pivoted at 15, and located by keys 12 on a table 7, the base being located in a member 2a. The base may be located directly in the table with the axis of the body 1 perpendicular to the table, the clamp being parallel to the table with a T-bolt replacing the pivotable bolt 16. In a modification, a member 2a, Fig. 4, is located on a table at various angles by bases 1b, 1c, &c., the relative positions of the keyways 31-33 of each base being arranged to provide any angle between 0 degrees and 360 degrees in increments of <1>/2 degrees. The member 2a is secured to the final base 1c by a key 34, and all of the bases are concentrically located by a bush 30.
Patent GB-706324-A (GB)
Title: Improvements in or relating to photographic contact printing apparatus
IPC: G03B27/02
Filed: 1950-11-10
Abstract: 706,324. Photographic contact printing apparatus. STASSE, R. Oct. 9, 1951 [Nov. 10, 1950], No. 27552/50. Class 98(2) The apparatus comprises a mask and means operated by the movement of the paper in its own plane to its correct printing position with respect to the edges of the mask to initiate a printing operation. As shown, an edge-locating member 1 is slidably mounted on a masking frame 2 by means of screws 7 and slots 8. A lever 4 pivoted at 3 to member 1 has a turned-over end 4a urged to grip the paper by means of a spring 13 but normally held away from frame 2 by a latch 6 mounted on a springy arm 9. The paper 5 is placed over the mask and slid along the edge of member 1 until it meets a lug 9a on arm 9, which is thereby moved to remove latch 6 from lever 4, which is released to clamp the paper against frame 2. A lug on lever 4 closes contacts 10 which close a circuit to start the exposure and to start an electric motor (not shown) which drives a shaft 11 carrying a cam 12. At the end of its revolution, cam 12 rocks lever 4 to release the paper 6, which falls out of the frame, owing to the tilt of the latter. Latch 6 then reengages under the end 4a of lever 4 and the apparatus is ready for another exposure. In modifications, the motor may be clockwork and contacts 10 are replaced by a brake mechanism, or cam 12 may be replaced by an electro-magnet co-operating with an armature on lever 4.
Patent GB-1300775-A (GB)
Title: Apparatus for beading, knurling, flanging, trimming or similarly machining sleeves or similar workpieces
IPC: B21D53/58
Filed: 1970-06-08
Abstract: 1300775 Making hollow-ware; shearing; rolling; flanging; corrugating tubes L SCHULER GmbH 8 June 1970 [13 June 1969] 27614/70 Headings B3A B3E B3M and B3W Apparatus for knurling, beading, flanging or trimming &c. hollow work 12 on a freelyrotatable spindle 4 comprises an annular tool 5, 6 on the spindle, a co-acting tool 16, 17 on a carrier 14 and having an elongated working surface against which the work is rolled during the forming &c. operation, and positive engagement means 7, 18 on the spindle and carrier. The forming &c. operations may be performed simultaneously or in succession and as shown the tools form an annular bead and simultaneously trim the work. Three spindles 4 are mounted in a holder 3 which is rotated intermittently to roll the spindles along stationary, circular and radially-adjustable tools 16, 17. An arcuate rack 18 on the carrier engages a seat 7 on the spindle 4 to effect its rotation and may be preceded by a frictional drive section 23, Fig. 2. The work is held on the spindles by pressers 11 and may be stripped therefrom by lugs 21 during retraction of the spindles.
Patent GB-168533-A (GB)
Title: Improvements in devices for raising sunken vessels and like bodies or for supportingvessels and like bodies in the water
IPC: B63C7/06
Filed: 1920-09-29
Abstract: 168,533. Willis, O. M., and MacGregor, R. S. Sept. 29, 1920. Sunken ships, raising.-A pontoon for raising sunken ships &c. consists of two or more sections arranged to telescope one within the other, and provided with means to extend the sections before expelling the water. The sections 1, 2, Figs. 1 and 3, are furnished with flanges 3, 4, with packing 5, so that when extended a water-tight joint is formed. A skirt 6 of canvas may also be provided for the same purpose. A cylinder formed in two telescoping sections 10, 11, with flanges 12, 13, is located within the pontoon, and from this cylinder air-supply pipes 14 with non- return valves 15, 16, extend to the exterior. The pontoon is sunk in the collapsed position by opening the valve 20, allowing water to enter through apertures in the bottom, and is attached to the sunken ship &c. by means of shackles 24. Compressed air is then admitted to the cylinder 10 through the pipe 14, extending the pontoon, the extension being limited by cables 26, which also transmit the lifting-strain to the top wall of the pontoon. The valve 18 is then opened, allowing air to pass into the pontoon through the pipe 17 and expel the water through the bottom openings. The pontoon is strengthened and its buoyancy increased by means of a number of closed chambers 21, reinforced by longitudinal plates 22, disposed on the exterior and bottom of the lower section 1 and in the interior and on the top of the upper section 2, and so proportioned that the pontoon just sinks when filled with water.
Patent GB-488907-A (GB)
Title: Improvements in resinous reaction products of inner ethers and natural resin acids: and methods of making the same
IPC: C09F1/00
Filed: 1937-10-12
Abstract: A rosin is esterified by heating with a polyhydroxy inner ether derivable from a straight chain hexahydric alcohol in the absence of air, volatiles being removed from the reaction mixture, the number of acid equivalents being not more than about three per mol. of ether. The inner ether may be prepared from the alcohol during the reaction. Suitable reactants include: rosin-common rosin, colophony, pure or crude abietic acid; hexahydric alcohols-sorbitol, mannitol, dulcitol, iditol, mono- or di-benzyl sorbitol, mono- or di-ethyl mannitol or syrups obtained by catalytic hydrogenation or electrolytic reduction of sugars.  Part of the rosin may be replaced by other organic acids. Softening agents such as castor oil may be added to the product. German Specification 500,504 is referred to.
Patent GB-444641-A (GB)
Title: The preparation of non-skid road surfaces
IPC: E01C7/35
Filed: 1934-09-27
Abstract: 444,641. Roads. TERREY, A. G., 2, Carlisle House, Lansdowne Court, Lansdowne Road, Worthing. Sept. 27, 1934, No. 27709. [Class 107] A method of making non-skid road surfaces comprises laying and consolidating a thin carpet of asphaltic material and thereupon applying a wearing layer of chippings which are of a gauge greater than the thickness of the carpet, so that after consolidation by rolling and by the subsequent traffic, the chippings will protrude above the carpet material. The chippings, which may be ¥" gauge, may be coated, prior to laying, with approximately 1¢ to 2 per cent of bituminous binder which has a flow point of at least 120‹ F. so that under the action of heat or traffic it does not flow off the projecting portions of the chippings. The coating may be applied hot or as a solution or aqueous dispersion, and it may contain micro-asbestos, casein, &c. to reduce the tendency of the coating to flow with increase of temperature. The carpet may comprise crushed stone or pit sand, and stone flour, together with 5 to 7 per cent of bituminous binder. If it is desired to produce a more rapid set of the carpet, the mineral materials may be first mixed with 3 to 4 per cent of flux oil and 2 to 3 per cent of a powdered bitumen is then added. The coating of the ohippings may be omitted, in which case the carpet is surface-painted with a bituminous material and the uncoated chippings are rolled in so that they carry with them a certain amount of the bitumen accumulated from the surface painting. To produce a non-skid surface on an existing road, the surface is painted with a thin coat of bituminous material and an asphaltic carpet is then applied to a consolidated thickness of ¢" and covered with a layer of chippings which may be previously coated with bituminous material.
Patent GB-603511-A (GB)
Title: Improvements in hairpins
IPC: A45D8/08
Filed: 1945-10-22
Abstract: 603,511. Hair pins. GAYLORD PRODUCTS, Inc. Oct. 22, 1945; No. 27795. Convention date, Oct. 21, 1944. [Class 131] A hair pin comprises a loop 11 with a pair of depending legs 12 each with relatively long outwardly diverging portions 13, 14, 16, the inner ends of the pair 13 terminating at the loop, joined by relatively short inwardly converging portions 17, 18, 19 disposed at an angle of 35 to 90 degrees to the longitudinal axis of the hair pin to form abutment shoulders in three hair-receiving pockets 21, 22, 23, and free ends 24 which are substantially parallel, the abutment shoulders 18 of the intermediate pocket 22 being longer than the shoulders 17 and 19 to provide a restricted passage 27. Specification 1300/02, [Class 131], is referred to.
Patent GB-273558-A (GB)
Title: Improvements in pencils
IPC: B43K21/14
Filed: 1926-11-05
Abstract: 273,558. Hasselquist, H. S. Nov. 5, 1926. Pencil holders. - In a pencil holder of the type in which feedfingers are forced into engagement with the lead bv relative rotation of two parts of the holder, the whole of the feed-fingers are maintained in, or are released from engagement with the lead according to the direction of rotation of the parts of the holder. The barrel 10 is bored to receive a non-circular, preferably triagular, lead holding tube 13, Fig. 5, formed with slots 29 in each face and rearwardly-inclined projections 30 at the lower end of the slots. Beyond the slots, the tube 13 is circular and is tapered and split to form a grip for the lead. The upper end of the bore of the barrel is widened to serve as a magazine from which leads are fed automatically to the tube 13, a conical annulus being secured in the magazine to facilitate the passage of the leads into the tube. The outer end of the barrel is closed by an eraser. Mounted on the tube 13 by means of a correspondinglyshaped split portion 36, Fig. 7, is a member 33 provided with a number of feed-fingers 37 adapted to project through the slots 29 into engagement with the lead. The fingers are formed with inclined front and rear faces 40, 41, and are constructed so as normally to spring apart from the lead. The rear faces 41 of the fingers are engaged by the circular front end of a sleeve 34, Fig. 2, mounted by means of the triangular rear end 45 on the tube 13. A screw-thread 44 on the sleeve 34 is engaged by the screw-threaded ends of fingers 49, Fig. 11, on a sleeve 48 rotatably but not longitudinally movable on the end of the barrel 10. A ferrule 12, Fig. 2, forming the point of the pencil holder, is secured to the sleeve 48. the outer end of the ferrule being bored to act as a guide for the lead. In order to project the lead, the ferrule 12 is rotated in a counterelock direction, thus rotating also the sleeve 48, and by the engagement of the fingers 49 with the screw 44, retracting the sleeve 34. The leadgripping fingers 37 are thus allowed to spring apart from the lead. Further movement of the sleeve 34 causes a projection 46 thereon to engage a lug on member 33 to retract the fingers. Rotation of the ferrule in the opposite direction causes the sleeve 34 to move forward and engage the faces 41 of the fingers 37, which are thus forced into engagement with the lead, the part 36 engaging sufficiently tightly with the tube 13 to enable this to be effected without, first moving the fingers forward. The fingers are moved forward with the sleeve after gripping the lead, until the faces 37 engage the projections 30 in the tube 13, this engagement serving to cause the fingers to engage the lead more tightly. The fingers 49 on the sleeve 48 are resilient, so that, should the ferrule 12 be further rotated after the sleeve 34 has reached the limit of its travel, the fingers will spring out of the screw-thread 44.
Patent GB-1038463-A (GB)
Title: Method of manufacturing synthetic ramsdellite
IPC: C01G45/02
Filed: 1963-07-15
Abstract: Synthetic ramsdellite, which has the same crystallographic properties as the natural mineral ramsdellite, is produced by slowly oxidizing natural or synthetically produced a -MnO(OH) (groutite) to form MnO2 in the form of ramsdellite.  The oxidation of the groutite is effected by oxidizing agents, e.g. solutions of perchloric acid, perchlorates, nitric acid, chromic acid, hypochlorites, hypobromites and hypoiodites.
Patent GB-673708-A (GB)
Title: An improved nozzle for controlling the discharge of liquids
IPC: F16K31/58
Filed: 1949-11-01
Abstract: 673,708. Spray-producers; valves. NU-SWIFT, Ltd., and HENSHAW, T. A. Jan. 29, 1951 [Nov. 1, 1949], No. 27904/49. Classes 69 (iii) and 135. A nozzle b is held in its forward position by a spring g acting on a valve member b<SP>2</SP> engaging with a washer d. The nozzle end is closed by a screwed plug c with a reduced part c<SP>1</SP>, the latter extending to about midway of a series of inlets f. A manually operated pivoted lever h acts on a ring i to force the nozzle inwardly and to allow liquid to flow through the inlets f and strike the part c<SP>1</SP> before leaving the nozzle. With the nozzle in its innermost position parts of the liquid streams entering the inlets f impinge against one another to produce a spray.