baber/WOPTO huggingface dataset:
Patent GB-815328-A (GB)
Title: Improvements in the manufacture of pigments
Inventor: COLLIER OWEN NEVILLE
IPC: C09C1/12
Filed: 1956-04-05
Abstract: Pigments consisting of cadmium sulphide and mercuric sulphide are produced by co-precipitation from a mixture of soluble salts of cadmium and mercury by the addition of a soluble sulphide followed by calcination in a gas-tight sealed vessel at a temperature of 500-600 DEG  C. and a pressure sufficiently high to prevent sublimation of mercuric sulphide.  If the soluble sulphide is barium, sulphide, and the soluble salts are, or contain, sulphates, barium sulphate is also precipitated and is present in the final pigment.  The solution of salts may also contain aluminium sulphate.  Large batches may be calcined in a rotary and tiltable tubular container or furnace, which may be freed of air and filled with an inert gas such as nitrogen before firing. Specification 791,098 is referred to.
Patent GB-638868-A (GB)
Title: Improvement in electrodeposition of nickel from an acid bath
IPC: C25D3/18
Filed: 1947-04-19
Abstract: 638,868. Electrodeposition of nickel. UDYLITE CORPORATION. April 19, 1947, No. 10479. Convention date, April 20, 1946. [Class 41] A bath for use in the electrodeposition of bright nickel comprises an aqueous acid solution containing one or more nickel salts, a minor proportion of an alpha or beta unsaturated aliphatic sulphonic acid, sulphonamide, or sulphonimide, and a minor proportion of a soluble alkyl pyridinium, quinolinium or isoquinolinium quaternary salt in which the alkyl radical contains from 1 to 18 carbon atoms. The nickel salts may be chosen from the following : nickel chloride, nickel sulphate, nickel sulphamate, nickel fluoborate, a mixture of nickel chloride with nickel sulphate, nickel sulphamate or nickel fluoborate, a mixture of nickel fluoborate with nickel sulphate or nickel sulphamate, or a mixture of nickel chloride, nickel sulphate and nickel fluoborate. The aliphatic compound may be allyl or vinyl sulphonic acid, allyl or vinyl sulphonamide, allyl or vinyl sulphorimide, or a nickel, cobalt, iron, sodium, potassium or magnesium salt of a sulphonic acid. The pH value of the solution is preferably between 3 and 5. The bath may also contain a limited amount of the chloride or sulphate of cobalt or iron. It may also contain as a buffer boric acid or citrates or formates, preferably associated with boric acid. Specifications 525,847, 611,483 and 638,867 are referred to.
Patent GB-369024-A (GB)
Title: Improvements in or relating to methods for developing photographic copying paper
IPC: G03D7/00
Filed: 1931-04-09
Abstract: 369,024. Developing-apparatus. KALLE & CO. AKT.-GES., 23, Rheinstrasse, Biebrich-on-Rhine, Wiesbaden, Germany. April 9, 1931, No. 10557. Convention date, April 9, 1930. [Class 98 (ii).] For developing prints with gaseous ammonia, an exactly predetermined quantity of ammonia solution is continuously fed to a small evaporating device within the developing chamber. The evaporating device may be a hot plate on to which the solution falls drop by drop; or alternatively a wick 2 dipping into a supply trough 3 may extend over a heated cylinder 1 within the developing chamber 5.
Patent GB-376352-A (GB)
Title: Improvements in or relating to wood block floors
IPC: E04F15/02
Filed: 1931-04-10
Abstract: 376,352. Floors. HART, C. H., 8, Charlton Drive, Sale, Cheshire. April 10, 1931, No. 10561. [Class 20 (iv).] The blocks 2 of a wood-block floor are resiliently urged towards each other by curved metal blade springs 3, which are formed with pressed-out tongues 5 extending under a shoulder 6 formed in the blocks 2.
Patent GB-153232-A (GB)
Title: New or improved bust support
IPC: A41C3/00
Filed: 1920-04-15
Abstract: 153,232. Negri, T. M. Feb. 14, 1920, [Convention date]. Bust supports.-A bust support consisting only of fabric is composed of three pieces for each side, viz., upper and lower front parts, Figs. 4 and 5, sewn together at ABC to form a breast pocket and a back part, Fig. 3, sewn to the pocket along the line HA. The lower edges KH, HG of the back part and the lower part and the edge AB of the upper part are cut on the straight.
Patent GB-309733-A (GB)
Title: Improvements in or relating to electric discharge tubes
IPC: H01J61/92
Filed: 1928-04-10
Abstract: 309,733. Dicker, S. G. S., (Naamlooze. Vennootschap Philips' Gloeilampenfabrieken). April 10, 1928. Vacuum tubes; lowpressure metallic-vapour apparatus.-In incandescent - cathode discharge lamps for the emission of ultra-violet or other rays, screens are arranged to prevent the deposition of disintegrated cathode material on that part of the tube wall intended for the transmission of rays. In the device shown in Fig. 1 a screen 5 above the cathode 4 protects the wall 1, and in the device shown in Fig. 2, which is provided with an inner tube 12 for the circulation of a liquid to be sterilized, a cylindrical screen 22 around the cathode 19 protects the end of the tube 12. The screens may be connected to leading-in wires to enable them to be used as auxiliary starting-electrodes. The filling may consist of argon and mercury vapour.
Patent GB-269906-A (GB)
Title: Music roll for player pianos
IPC: G10F5/04
Filed: 1927-04-20
Abstract: 269,906. Foss, O. April 20, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Drawings to Specification Tune sheets.-A tune sheet for player-pianos has the corresponding, or accompanying, music printed transversely thereon, each bar being stepped against the travel of the sheet, and the transverse lines being read from bottom to top successively. Music for a duet may be arranged similarly in the two longitudinal halves of the sheet.
Patent GB-896223-A (GB)
Title: Fuel induction through the rotor shaft of a gas turbine
IPC: F02C7/232
Filed: 1960-03-25
Abstract: 896,223. Gas turbine plant. BMW TRIEBWERKBAU G.m.b.H. March 25, 1960 [May 22, 1959], No. 10661/60. Class 110 (3). [Also in Group XI] A gas turbine plant in which fuel is fed through the hollow rotor shaft to a centrifugal atomizer by the axial thrust generated in the paraboloid of revolution of the rotating fuel has the feed path from a central entry orifice to the atomizing nozzles divided into at least three consecutive sections of progressively increasing diameter, the individual sections being separated by liquid seals and the interior of the rotating cylindrical column of liquid being connected to the outside atmosphere or with a chamber in which a suction head is maintained. The plant shown comprises a shaft 1, a compressor rotor 2, atomizing disc 3 and a turbine rotor 6. The rotors and shaft are held together by a tension-rod 7 the bottom of which is formed with a head 8 containing a chamber 9 to which fuel is fed from a conduit 20 through an orifice 10. The fuel leaves the chamber 9 through ducts 11 and enters a recess 12. The fuel passes through the bores 13, 14, to a recess 15 in the atomizing disc 3, and finally passes through duet 16 and nozzles 19 into the combustion chamber. The flange 18 which enters the recess 15, and the shoulder on the rod 7 in the recess 12 forms liquid seals which prevent access of the ambient air or combustion pressure to the space inside the hollow column of rotating liquid. To prevent the build-up of pressure by fuel vapour in this space, the wall of the compressor rotor has a radial duct 22 which communicates with the suction side of the compressor.
Patent GB-559815-A (GB)
Title: Method of producing finely divided material
IPC: C09D5/22
Filed: 1942-07-31
Abstract: 559,815. Grinding by the aid of special solutions. MARCONIS WIRELESS TELEGRAPHCO., Ltd., July 31, 1942, No. 10704. Conventiondate, Jan. 18, 1941. [Class 59] [Also in Group XL] Finely divided material, such as is used in pig-. ments or as luminescent material in fluorescent screens, is produced by dissolving the material in a solvent to form a solution capable of being solidified by cooling, quenching the solution to solidify it and leaching the solvent from the solidified, mass to leave the material in finely divided form. The solvent may be solid at normal temperature and the material may be mixed with it before or after it is melted. The rate of cooling of the solution is controlled to control the size of the particles of the material. The solution may be quenched by pouring it into the quenching medium in the form of a sheet or ribbon. When zinc oxide is to be reduced to a finely divided state, it may be mixed with potassium hydroxide as a solvent which is then heated to above the melting point of the solvent to dissolve the zinc oxide which is dispersed in molecular subdivision throughout the solvent and upon cooling is retained in a state of very fine subdivision. Water at room temperature is preferably used as the quenching medium. The leaching operation is effected by water. Zinc sulphide may be divided by mixing it with sodium chloride, heating to above the melting point of the mixture and rapidly cooling, leaching being effected by water. A mixed solvent of sodium chloride and potassium sulphide may be employed for dissolving zinc sulphide and it is found that a solvent containing an ingredient having an element or radical in common with an element or radical of the solute produces superior results. Cadmium oxide may be dissolved in borax and quenched in water, water being also utilized to leach the borax from the finely divided cadium oxide. Peroxides of sodium and barium may be used as constituents of solvents. Luminescent materials such as zinc sulphide activated by a metal activator such as magnanese, silver, copper or other metal or by a copper compound such as copper sulphide may be subdivided as described above. Subdivided materials such as zinc sulphide may be recrystallized at temperatures of 850‹C to 1300‹C with or without the introduction of an activator to improve the luminescent properties of the materials by floating the finely divided material in a hot gaseous atmosphere.
Patent GB-343370-A (GB)
Title: Improvements in mercury vapour rectifiers
IPC: H01J13/14
Filed: 1930-04-04
Abstract: 343,370. Mercury-vapour rectifiers. AKT.-GES. BROWN, BOVERI ET CIE, Baden, Switzerland. April 4, 1930, No. 10718. Convention date, April 6, 1929. [Class 39 (i).] In a mercury-vapour rectifier having the cathode mercury cooled by a circulatory process, the cooled mercury is conveyed through the arc space in the form of a continuous jet on which the cathode spot is formed. As shown, mercury is forced by a pump through a cooler g and a nozzle d which, with a mercury collector e, is insulated from the casing. An ignition anode c is provided. In a modification, (Fig. 2, not shown), the pump is housed within the rectifier.
Patent GB-108480-A (GB)
Title: Improvements in Roller Bearings.
Inventor: STRONG WILLIAM JAMES HENRY
IPC: F16C9/04
Filed: 1917-07-26
Abstract: 108,480. Strong, W. J. H., (Assignee of Freeland, L. D.). Aug. 3, 1916, [Convention date]. Antifriction-wheel bearings.- A journal bearing, particularly for the crank-shafts of motor-driven fans, comprises a flat resilient sheet-metal frame B with three radial arms or forks D carrying antifriction wheels F. The frame has a gap C fitted with a tension screw for the purpose of inserting the shaft M and for adjusting the play of the wheels F against the shaft. For the shaft bearings, the frame B is fastened by screws to the casing of the machine, and for connecting-rod bearings, it has an extension G for attaching to the connecting-rod T. Collars on the shaft bear against the sides of the wheels F in one of the bearings to take end thrusts.
Patent GB-1536717-A (GB)
Title: Surface acoustic wave devices
IPC: H03H9/02
Filed: 1976-03-17
Abstract: 1536717 Surface wave devices MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 17 March 1976 [18 March 1975 (2) 18 June 1975] 10791/76 Heading H3U A surface wave device comprises a base 14, a piezoelectric layer 12 and an intermediate layer 33, in which the temperature coefficient of surface wave velocity in layer 33 has a different sign from that in layer 12 or in base 14. Layer 12 has a thickness less than the wavelength of a surface wave and may be of zinc oxide. Layer 33 may be of silicon oxide or glass, and base 14 may be of silicon. Interdigitated electrodes 71 are provided on or below layer 12, and to obtain a particular temperature characteristic a metal film 91 may also be provided.
Patent GB-243978-A (GB)
Title: An improved method of producing anhydrous magnesium chloride
IPC: C01F5/34
Filed: 1925-04-27
Abstract: 243,978. Arnold, C., (Dow Chemical Co.). April 27, 1925. Magnesium chloride.-The dehydration of magnesium chloride crystals is effected by mixing the normal crystal with partially dehydrated magnesium chloride (preferably MgCl22H2O) both insolid form, and then heating the mixture in a current of hot combustion gas and air to a temperature of 115‹ C. gradually rising to 350‹ C., thus avoiding fusion. The product at this stage is mainly the dehydrated salt, MgCl22H2O, and a part of this is used to mix with the next quantity of normal crystals. The second stage of the dehydration is effected in hydrochloric acid gas at a temperature of 200‹ C. gradually rising to 500‹ C. The first stage may be effected in a shelf drier, Fig. 1, the salt entering at 5 and leaving at 6, while flue gas enters at 7 and air at 9 and the gases leave at 8. The second stage may be effected in a rotary tube 12 which receives dry hydrochloric acid gas from a pipe system 14 including in its circuit two drying towers 13 for use alternately for drying the gas. The sulphuric acid from the towers is concentrated in a concentrator 16 and used again. Specification 4417/89 is referred to.
Patent GB-1335293-A (GB)
Title: Apparatus for winding weft thread onto the bobins of shuttles of  looms with a travelling-wave shed and with a plurality of  consecutively progressing shuttles
IPC: D03D47/26
Filed: 1971-04-23
Abstract: 1335293 Travelling wave-shedding looms VYZKUMNY USTAV BAVLNARSKY 23 April 1971 [28 April 1970] 10929/71 Heading D1E A travelling wave-shedding loom has a plurality of shuttles 24, with pivoted bobbins mounted on a chain 21 circulating in an endless path, a loop of which is outside the shed, and a plurality of bobbin winding heads 30 on a second chain 10 arranged outside the shed in coincidence with the shuttle chain 21, so that the shuttle bobbins may be rewound during that portion of their travel when they are outside the shed. The chains 10, 21 are driven by sprockets 23, 12 on a motor driven shaft 13 which also drives a shaft 50, supporting a weft creel that is rotated in synchronism with the winding heads 30, and having a sprocket 46 which drives, at a faster rate than the chains, a winding head driving belt 47. The shaft 13 is mounted in upper and lower plates 3, 2 having guideways for the chains, the lower plate 2 also having a cam 34 that operates to raise and lower the winding heads 30 into the shuttles 24. A guide 36 is provided having a cam groove 37 operating clamps 39 on the winding heads 30. In use, as a shuttle emerges from under the warp sheet and enter the path of movement of the heads 30, a head is lowered by the cam 34 so that a clamp 39 holds the weft end and the driving belt 47 rotates a bobbin winder 35 so that weft is wound onto the bobbin. Winding proceeds as the shuttles progress around the coincident path of the chains and, as the shuttles enter the shed, the winding head is raised and scissors 54 operate to sever the weft trail extending between the shuttle 24 and winding head 30.
Patent GB-551533-A (GB)
Title: A method of and means for dehydrating organic solvents, petrols, oils and the like
IPC: C10G33/04
Filed: 1941-08-27
Abstract: 551,533. Polygalacturonic acid. AFRICAN SISAL & PRODUCE CO., Ltd., WALSH, C. L., and BROWNE, R. J. Aug. 27, 1941, No. 10941. [Class 121] [Also in Group XIII] Polygalacturonic acid and its salts which may be used to dehydrate organic solvents and petrols which are not ordinarily miscible with water (see Group XIII) may be prepared by extracting plants of the agave type, after treatment with hot water, with an alkali, the resultant salt being isolated or precipitated with an acid. Specifications 517,729 aud 532,877 are referred to.
Patent GB-276274-A (GB)
Title: Improvements relating to yarn reels
IPC: B65H49/30
Filed: 1927-04-25
Abstract: 276,274. Kohorn, Oscar, Freiherr von, (trading as Kohorn & Co., 0.), and Perl, A. G. March 29, 1927, [Convention date]. Skein holders.-The yarncarriers 1, of hard rubber or the like, are secured to radial levers 2 pivoted at 3, at about the middle of their length, in a casing 4 connected to the driving disc 5. The other ends 6 of the radial levers engage in an annular groove 7 on a disc 8 which is axially adjustable in the casing 4 under the control of a spring 11 to vary the position of the members 1. A spring pressed pawl 12 engages in a notch 13 to hold the device in the end position.
Patent GB-793399-A (GB)
Title: Improvements in or relating to apparatus for charging electric fences
IPC: H01H51/34
Filed: 1956-04-11
Abstract: 793,399. Supply systems for electric fences; charging and discharging condensers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 11, 1956 [April 14, 1955], No. 11016/56. Class 38 (4). To limit the voltage of the transformer 6 in the event of short-circuiting of the switching tube 5 and rectifier 2 of a supply system for an electric fence 8, comprising a condenser 4 maintained on charge over a resistor 3 and rectifier 2 from an A.C. source 1 and periodically discharged by a tube 5 into a transformer 6 feeding the fence, the transformer core is formed with an air gap 11, of at least 0.5 mm. and, preferably, 1.0 mm. or more. The circuit parameters are preferably such that upon failure of the tube 5, or rectifier 2, the fence voltage does not exceed 24 R.M.S.
Patent GB-129113-A (GB)
Title: Improvements in or relating to the Manufacture of Artificial Teeth.
Inventor: FLINTOFF THOMAS
IPC: A61C13/10
Filed: 1918-07-04
Abstract: 129,113. Flintoff, T. July 4, 1918. Teeth, artificial. - An artificial tooth for vulcanite or other plastic work is formed with a longitudinal groove within which slides a flat retaining-key provided with two or more projecting studs which become embedded in the vulcanite &c. The keys may be manufactured as continuous studded strips or sheets to be divided by the dentist. In the form shown in Figs. 2 and 3, the tooth a is formed with a groove b open towards the root of the tooth and closed towa.rds the biting- edge, and with lateral recesses e to receive part of the vulcanite. The flat key d slides freely in the groove band is formed with rigidly attached studs d<1> which project through the groove into the vulcanite and may be arranged horizontally, as shown, or vertically. In modifications, the groove b may be open at both ends or at the lower end only. Fig. 5 shows a continuous strip d with studs d' arranged in pairs, from which separate keys may be cut. In modifications, pairs or sets of studs are arranged longitudinally on the strip, or a studded sheet to be cut in two directions at right-angles may be provided.
Patent GB-539694-A (GB)
Title: Improvements relating to clutch mechanism for intermittently-operated power-driven machines
IPC: F16D11/02
Filed: 1940-06-29
Abstract: 539,694. Operating clutches. BAXTERS (BOLTS. SCREWS & RIVETS), Ltd., and DENT, W. C. June 29, 1940, No. 11050. [Class 80 (ii)] In clutch mechanism wherein a bolt or movable member is withdrawn to permit of clutch engagement and is afterwards moved into the path of a rotating control part of the clutch to cause clutch disengagement after the completion of a working stroke, there is provided a secondary release bolt mechanically connected to the primary bolt so as to move therewith but in reverse direction, so that should the main bolt fail to return to clutch-releasing position, the secondary bolt will be in an operattive position for effecting release. As applied to a dog-clutch, one end of a bolt 2 sliding in a block 1 is adapted to co-operate with a cam 4 on the driven member 5 of the clutch in order to withdraw the member and release the clutch. The opposite end of the bolt has a lateral projection 6 slidable in a slot 7 and adapted to be engaged by a pawl 8 on a lever 9, actuated by the starting treadle, to withdraw the bolt from the cam. A second bolt 10 parallel to the bolt 2 acts as a safety bolt and is loaded by a spring 13 which tends to retract the bolt but it may be moved forward to engage a cam 15 on the clutch member 5. A lever 18 pivoted on a pin 17 carries adjustable pins 19, 20 adapted to engage the rear ends of the two bolts. When the starting pedal is operated, the main bolt 2 is withdrawn by the pawl 8 acting upon the extension 6 and this movement projects the bolt 10 forwardly, but before this bolt can engage the cam 15, the pawl 8 is tripped by a pin 21 to release the bolt 2. The spring 13 then retracts the bolt 10 and through the lever 18 returns the bolt 2 forwardly ready to engage the cam 4. Should the main bolt, however, fail to return, the bolt 10 will remain in its forward position to engage the cam 15 and effect release of the clutch. Thus the clutch will always be released after one revolution. The bolt 2 may be releasably held in its projected position by a spring-pressed ball or plunger 22 and recess 23. The member 5 and cams 4, 15 may be prevented from rotating when the clutch is disengaged by a spring- loaded plunger 24 having a bevelled nose 26 engaging a groove 27. In a modification, the bolts 2, 10 are arranged to co-act with a single cam. In a further modification, Fig. 6, the bolts 2, 10 are adapted to act upon an arm 35 of a rotatable key lying in a groove in the driven shaft 32 and adapted to be rotated to engage one of a number of key-ways in a driving member. In a still further modification, the main bolt is loaded by a spring and withdrawn by a cable.
Patent GB-1005610-A (GB)
Title: Preparation of telomers of tetrafluoroethylene
Inventor: ROBERTS HUGH LEITHEAD
IPC: C07C17/281
Filed: 1963-03-20
Abstract: Telomers of tetrafluoroethylene having the general formula Cl(C2F4)nCl, where n is one or more, are produced by heating tetrafluoro-ethylene with phosphorus pentachloride at 100 DEG  to 200 DEG  C. and under autogenous pressure under anhydrous conditions and subsequently recovering the telomers.  The reaction pressure may be from 20 to 75 atmospheres. The molar ratio of tetrafluoroethylene to phosphorus pentachloride may be from one to five when a high proportion of telomers in which n is 1 to 4 is required and may be at least 12 when telomers in which n is 5 or more are required.