baber/WOPTO huggingface dataset:
Patent GB-489282-A (GB)
Title: Improvements in or relating to mosaic electrodes for electron discharge devices
IPC: H01J29/43
Filed: 1937-01-22
Abstract: 489,282. Electrodeposition of metal; depositing metals by electric discharge. BAIRD TELEVISION, Ltd., JONES, V. A., and NUTTALL, T. C. Jan. 22, 1937, No. 1927. Drawings to Specification. [Class 41] [Also in Groups XL and XXII] In the manufacture of mosaic electrodes for use in electron-discharge devices for television, &c. purposes, an open helix of wire or strip material is wound on an insulating rod, metal is deposited thereon, and the helix removed leaving discrete areas of metallized surface. The turns of metallized surface so formed are broken up by scribing a line so as to remove the metal. Alternatively, the metal may be deposited on one side only of the rod. Where it is desired to incorporate a common signal plate, the rods may be metallized before winding on the helical strip which is subsequently provided with an insulating layer, e.g. silica and the metal forming the base of the mosaic elements. A number of rods are then associated side by side in a frame to form a two dimensional mosaic surface. The metal may be deposited by sputtering or electrolytic deposition.
Patent GB-964692-A (GB)
Title: Improvements in voltage control apparatus
Inventor: MARTIN LEONARD JOHN
IPC: H01F29/04
Filed: 1960-01-19
Abstract: 964,692. Transformers. BRENTFORD TRANSFORMERS Ltd. April 7, 1961 [Jan. 19, 1960], No. 1934/60. Heading H1T. [Also in Division H2] In a voltage control apparatus, stepless variation between the taps of the tapchanging autotransformer VR1  is provided by the control transformer T2, the voltage across the secondary SS of which is varied by the silicon controlled rectifier SCR switched by the transistor gate circuit. The rectifier bridge controls the distribution of the voltage operating across secondary winding AS between the primaries of the transformers T2, T3, the secondaries SA, SB being connected to the two halves of secondary SS, whose centre tap is connected to the output L<SP>1</SP>. The variable resistor VR2 which controls the phase of the transistor gate is mechanically coupled to an eight-channel selector switch (not shown) operating the tap changing. When the contact 1 is closed the rectifier SCR is arranged to fire at 0 degrees, the tap voltage then being bucked by a voltage equal to half the intertap voltage. As the gating is retarded towards 180 degrees, the degree of buck decreases until there is no voltage difference between the lines A and B and contact 2 is closed as contact 1 is opened. Further movement of the driving gear advances the gating phase to 0 degrees, and there is then a voltage between the lines A and B equal to the intertap voltage and the voltage on the lead L<SP>1</SP> is boosted by half the intertap voltage and contact 3 may then be closed as contact 2 is opened. In an alternative arrangement (Fig. 2, not shown), two silicon controlled rectifiers are provided each having a separate gating circuit arranged such that at least one of the rectifiers is always conducting.
Patent GB-193625-A (GB)
Title: An improved method and apparatus for manufacturing expanded metal
IPC: B21D31/04
Filed: 1922-01-23
Abstract: 193,625. Tickle, L. B., and Dell, R. V. J. Jan. 23, 1922. Cutting and making expanded metal; shearblades.-Expanded metal is made by slitting a sheet in the manner shown in Fig. 1, then pressing it to raise alternate longitudinal uncut strips and finally stretching the sheet laterally. The expanded metal may be used as a reinforcement for concrete &c. The sheet metal is fed intermittently, by ratchet-operated rolls 12, between coacting curved-edge cutters 4, and dies 2, the ratchet-wheels being rotated by pawls on links 15 reciprocated by a crank disc 22<a> on the shaft 7. The fee d-rolls are connected by a chain 13 and adjustment of the feed is provided for by a diametral slot 22 in the crank-disc 22<a> and a slot 18 in the link 15.
Patent GB-660837-A (GB)
Title: Improvements in or relating to decaffeinated coffee
IPC: A23F5/22
Filed: 1949-01-25
Abstract: 660,837. Coffee. AMERICAN HOME FOODS; Inc. Jan. 25, 1949, No. 2007/49. Class 129. In the production of decaffeinated coffee, an aqueous extract of ground roasted coffee beans containing at least 40 per cent by weight of coffee solids is brought into contact with a water-immiscible organic solvent for caffeine, the decaffeinated extract being subsequently separated from the caffeine-laden solvent. Hot water at 190‹-200‹ F. is passed through extractors 1 containing ground roasted coffee, and the resultant extract leaves at 80‹-90‹ F. The extract may contain about 35 per cent solids, in which case it is passed through an evaporative concentrator 4 to bring its solids content to 40-50 per cent. A pump 7 forces the extract through a nozzle 8 in the bottom of a decaffeinating column 9 under a pressure of 2<SP>2</SP>/ 3  atmospheres, in the form of fine droplets which rise through a layer 10 of methylene chloride (which has a higher density) and collect in a layer 11. The latter overflows into a pot 12 and is forced by a pump 14 to a vacuum drum drier 16. Solid decaffeinated coffee is discharged to a bin 16a and the separated vapours are condensed in a condenser 18. The solvent is separated out from the condensate in a decanter 19 and is returned by a pump 22 to a storage tank 24 from which it returns to the column 9. Caffeine-laden solvent leaving the column 9 passes up a standpipe 26, which is vented at 27, and thence through an overflow 28 to an evaporator 30 in which the solvent is removed from the caffeine. The solvent returns by way of a condenser 32 to the tank 24. The caffeine is purified at 35 by carbon treatment and recrystallization from water. The temperature of the column 9 may be maintained at 40‹-50‹ F. by means of a cooling jacket. To avoid the tendency of extract droplets to coalesce into larger drops half-way up the column 9, the latter may be replaced by two shorter columns connected in series. Instead of methylene chloride, the caffeine solvent may be benzene or such chlorinated hydrocarbons as di- or tri-chlorethylene or ethylene chloride. The solvent may be lighter than the extract instead of heavier. The decaffeination may be carried out in batches instead of continuously, the extract and solvent being stirred together in a shallow vessel and then allowed to separate. Specifications 625,349 and 635,185 are referred to.
Patent GB-130373-A (GB)
Title: Improvements in or relating to Projectiles.
IPC: F42B12/64
Filed: 1918-02-04
Abstract: 130,373. Vickers, Ltd., and North, T. R. Feb. 4, 1918. Projectiles. - Relates to shrapnel shells of the kind comprising a light casing containing the bullets and a base which carries the driv-. ing-band and to which the casing is attached. According to the invention, the shell comprises an ignition device C and an explosive charge disposed in the 'base B, and a nose A<1> which is so formed or secured to the casing A that it is broken off or detached by the forward movement of the bul. lets when the charge in the base is exploded. In the shell ehown in Fig. 2, the nose is integral with the casing A, but weakening. slits are formed circum. ferentially at a. The cap is, in a modification, formed separately and attached by pressing its rear edge into a groove in the body, and, in this construction also, the base is attached to the casing by an ordinary screw-thread, instead of such a thread as is shown in Fig. 2. A lead or other disk A<2> in the front of the shell' is provided with projections a<2> to keep the bullets in straight columns, and the bullets may be slightly flattened by pressure when in the shell. The ignition device C shown is the time-fuse described in Specification 130,384. The Provisional Specification refers also to incendiary and other shells.
Patent GB-259808-A (GB)
Title: Improvements in or relating to stencil sheets
IPC: B41N1/24
Filed: 1926-01-23
Abstract: 259,808. Horii, S. Jan. 23, 1926. Pulp, adding special substances to; paper, treating with special materials.-Stencils for use on duplicating-machines are formed from coated sheets comprising a base of fibrous material, such as Yoshino paper, coated with a colloidal composition including a Japanese seaweed known as Funori, alkali soaps of solid fats, such as hardened oils, tallow, or Japan wax, and glycerine. Agar-agar or gelatine may also be added. The composition may be added to the paper pulp in a mixing hollander.
Patent GB-104179-A (GB)
Title: Improvements in Gas Analyising Apparatus.
Inventor: GEORGE A BURRELL
IPC: G01N7/06
Filed: 1917-02-12
Abstract: 104,179. Burrell, G. A. Feb. 11, 1916, [Convention date]. Void [Published under Sect. 91 of the Act]. Drawings to Specification. Gas analysis.-An apparatus for testing for and estimating combustible gases consists of a U-tube of which one limb is a stout but somewhat narrow glass tube, and the other a wide metal tube, each limb having a chamber at the top. An ignition filament is arranged in the chamber at the top of the wide limb, this chamber having a valved outlet. To use the apparatus, water is introduced to the zero level of a scale, and air is blown, for instance by the mouth, into the narrow limb, so that the water rises to the valved outlet of the combustion chamber. On releasing the pressure, the water-level becomes equalized, thus drawing in a sample of gas. The valve is closed and combustion is effected by an electric current, the diminution of volume, after cooling, being read off on the scale, which is selected to correspond with the combustible gas to be tested. The instrument is calibrated by means of gas mixtures of known composition. The apparatus is intended to be worked from a miner's cap-lamp battery or other portable battery, but a form is described in which batteries are enclosed in the wide limb of the apparatus.
Patent GB-344604-A (GB)
Title: Improved device for separating light liquids
IPC: B01D17/02
Filed: 1930-01-21
Abstract: 344,604. Centrifugal machines. LINNMANN, W., 37, Bischoffstrasse, Altenessen, Essen, Germany. Jan. 21, 1930, No. 2128. [Class 23.] Density separators.-A centrifugal device for separating light liquids, such as benzol and water, having a tangential supply pipe, consists of a tank surrounded by a gutter, open towards the interior and connected to the supply pipe. The mixture flows into a cylindrical separating tank b through a tangential inlet pipe a at some height above the base. The pipe a opens into a gutter c surrounding the chamber where the mixture is partially separated by centrifugal action. The lighter liquid rises over the top edge of the gutter c while the waste water sinks and flows out through the pipe e. The cross section of the gutter c may decrease towards its extremity. In an alternative form the tank is of rectangular cross section.
Patent GB-1420185-A (GB)
Title: Nitrile-substituted o-ethyl-s-n-propyl-o-vinylthionothiol phosphoric acid esters a process for their preparation and their use as insecticides or acaraicides
IPC: A01N57/12
Filed: 1974-01-17
Abstract: 1420185 Unsaturated dithiophosphate esters containing a nitrile group; ketonitriles and their enolates BAYER AG 17 Jan 1974 [18 Jan 1973] 02150/74 Headings C2P and C2C The invention comprises compounds of the formula in which R is alkyl with 1 to 4 carbon atoms or carbalkoxy with 1 to 6 carbon atoms in the alkyl moiety or a phenyl or naphthyl radical which is optionally monosubstituted or polysubstituted by halogen, nitro, nitrile, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 3 carbon atoms or haloalkyl with 1 to 3 carbon atoms, and R<SP>1</SP> is hydrogen or alkyl with 1 to 6 carbon atoms. They may be obtained by reacting with a ketonitrile: NC-CH(R<SP>1</SP>)(C=O)(R) (V) or its enol salt: NC(R<SP>1</SP>) C=C(R)OM (Va) where M is one equivalent of alkali metal, alkaline earth metal or ammonium, the reaction being suitably carried out in the presence of an acid acceptor when the ketonitrile is used. The products have insecticidal and acaricidal properties and may be used as active ingredients in conventional pesticidal compositions. The ketonitriles (V) and their enolates (Va) may be prepared by a variety of defined methods and detailed examples are given for preparing: (1) by reacting benzoic acid ethyl (or methyl) ester with acetonitrile in the presence of sodium methylate at 120-140 C. and then treating the mixture with cone. HCl; (2) by a process as in (1) but without the addition of acid, the sodium salt being formed as a precipitate on cooling the reaction mixture to - 10 C.; (3)  by reacting p-dichlorobenzene with acetyl chloride by the Friedel-Crafts method and subsequent bromination to form 2<SP>1</SP>,5<SP>1</SP>-dichloro-2- bromoacetophenone and then reacting the latter with NaCN which is added dropwise in the form of a solution in water and ethanol; (4) by reacting propionitrile with oxalic acid diisopropyl ester in the presence of potassium tert-butylate and i-propanol at 80-90 C.; and (5) by nitrating 2-cyanoacetophenone with fuming nitric acid. Several other products of Formula V and Va are also specified and are stated to be obtained by an appropriate specified method of the above type.
Patent GB-1438073-A (GB)
Title: Sealing devices for leak-tight shaft ends
IPC: F16J15/34
Filed: 1974-01-17
Abstract: 1438073 Seals COMMISSARIAT A L'ENERGIE ATOMIQUE 17 Jan 1974 [29 Jan 1973] 02162/74 Heading F2B In a sealing arrangement for a rotary shaft 1, leakages of L and G from two end face seals 6, 7 and 10, 12, towards compartments III and II of an intervening buffer chamber, are kept segregated and swept separately from outlets 25 and 28, by a single scavenging fluid A. Fluid A, which may be air at atmospheric pressure or nitrogen enters the central region of the buffer chamber through duct 23. Various ring- shaped structures (Figs. 2-10, not shown) divide fluid A into two thin annular streams moving in countercurrent to the leakages. One example of such a structure is grooved checks 17, 18. In one form, the inlet duct for fluid A (57, Fig. 9, not shown) is formed in shaft 1. The sealing arrangement may be used with a compressor 3, for UF 6 , driven by a motor 5. L may be a vapour or aerosol lubricant.
Patent GB-1163695-A (GB)
Title: Improvements in or relating to Converter Hoods.
IPC: F22B1/18
Filed: 1968-01-16
Abstract: 1,163,695. Converter hoods. BABCOCK & WILCOX CO. 16 Jan., 1968 [16 Jan., 1967], No. 2283/68. Headings F4B and F4J. A converter hood 12, which defines a tubelined duct through which gases discharged from the converter 10 are conveyed away from the converter to a gas quencher 26, comprises an upright upper part 16 which merges with an inclined lower part 15, means 50 for supporting the dead weight of the hood at a location between the ends of the upper part, and additional means ensuring that the hood is maintained in a predetermined orientation with respect to the vertical whilst permitting longitudinal thermal expansion of the hood. As shown, the walls of the portion 16 are lined with panels of co-planar tubes joined at their corners to form a closed octagonal cross-sectional structure, the hood 12 being pendantly supported from beams 40 at a level between the ends of the portion 16 by an encircling support 50. The additional means required to maintain the hood in position when expansion occurs include first guide means 74 co-operating with the lower part of the duct to restrain lateral movement of the duct in one plane and second guide means 70 co-operating with the upright part of the duct to restrain lateral movement in a plane normal to the restraint imposed by the first guide means. The guide assembly 70 comprises a buckstay 71 which encircles the hood and has diametrically opposite slots on either side of the hood, and supporting beams 73 with elongated fingers 72 which engage said slots to restrict side-to-side horizontal movement. The buffer structure 74, located beneath the inclined portion 15, comprises an upright of H-cross-section rigidly attached to a structural steel supporting assembly 76, the innermost flange of the H-section being embraced by a vertically extending flanged member attached to a backstay 81 connected to the hood portion 15 (see Fig. 3, not shown), such that all movement of the hood 12 will be guided in a vertical direction. The gases discharged from the upper end of the hood 12 are passed through a fluid cooled gas turning chamber 25 where the gases pass through a 180 degree turn to discharge downwardly to the open upper end of the gas quencher 26.
Patent GB-731193-A (GB)
Title: Improvements in and relating to centrifugal switches
IPC: H01H35/10
Filed: 1953-01-27
Abstract: 731,193. Ratchet clutches. ETABLISSEMENTS MERLIN & GERIN SOC. ANON. Jan. 27, 1953 [Jan. 29, 1952], No. 2302/53. Class 80 (2). [Also in Groups XXX and XXXVII] The drive to a centrifugal switch controlling a conveyer is adjustable so as to permit of rotation in both or only one direction. The roller 1 is driven by the conveyer and thus rotates a plate 2 fixed thereto. The centrifugal weights 20 are attached to a driven plate 5 having raised segments 14, 15 adapted to be engaged by a pawl 8 on plate 2. The pawl 8 is biased by a spring 10 and is pivoted at 9. In the position shown, rotation of plate 2 in either direction causes the side face of pawl 8 to abut the end face of segment 14 or 15 so that the plate 5 is also rotated in the same direction. If the pawl is turned through 90 degrees by a pin 6, the outer end face of pawl 8 will engage, e.g., segment 14, and will drive the plate 5. Reverse rotation, however, causes the sloping face of pawl 8 to abut segment 15 so that the pawl rides up over the segment and does not drive the plate 5. Adjustment of pawl 8 through a further 180 degrees ensures one-way rotation of plate 5 in the reverse direction. The pin 6 is located axially by means not shown, and angularly by a spring ball engaging recesses 17.
Patent GB-783340-A (GB)
Title: Improvements in or relating to rotary air compressors
IPC: F04C28/24
Filed: 1954-07-20
Abstract: 783,340. Rotary compressors. LEAD WOOL CO., Ltd., and BALL, E. F. Sept. 26, 1955 [July 20, 1954; Oct. 25, 1954], Nos. 2341/57 and 2342/57. Divided out of 783,339. Class 110 (2). A rotary compressor as described in Specification 783,339 has an unloading valve 24 in the inlet, and means to maintain oil circulation in the unloaded state. When the compressed air in the receiver 36 reaches a predetermined pressure a valve 103 allows compressed air to be admitted through a port 89 in the valve 24 to the right of a piston 87 to force a valve 84 on to its seat 82 to close the air intake passage 81 against the action of a spring 86. The valve 84 may be closed manually by a wheel 98 so that the compressor can be started under no load. A relief valve 93 is opened by a projection 92 on a stem 85 of the valve 84, allowing air which bypasses the valve 84 through a passage 90 to be circulated through the compressor and returned from a port 102 in the separator through a port 91 and a passage 97 to the air intake 81, and distributing some pressure air through a port 95 to shaft seals and bearings, the small amount of oil still entrained in the air lubricating the bearings.
Patent GB-1299371-A (GB)
Title: Improvements in and relating to clamping devices
IPC: F16L3/12
Filed: 1969-01-15
Abstract: 1299371 Clamps QVF Ltd M E DODD and P E AUSTIN 24 March 1970 [15 Jan 1969] 2342/69 Heading E2B A clamping device 1 has arms 2, 3 connected together by an integral portion 9 which has a reduced cross-section and serves as a hinge. The arms 2, 3 have ends 4, 5 respectively, each having a socket or slot 6 to receive a clamping member 7 therein. The member 7 may be a bolt, for example, which may have a nut (not shown) or may screw into one of the arms. The device may be made of steel or of synthetic plastics material such as polypropylene or nylon. The cross-section of the device may be circular or square and the cross section of the portion 9 may be circular, oval or square. The arm 2 is provided with a boss 10 for connecting the device to a rod (not shown), for example, the boss being mounted on the arm by a member 11.
Patent GB-206758-A (GB)
Title: Device for use in the manufacture of rear axle casings or structures for motor road vehicles
IPC: B21D53/90
Filed: 1923-01-27
Abstract: 206,758. Scott, A. C. Jan. 27, 1923. Shafts.-Rear axle casings for motor-road vehicles are made from a heated tube S, Fig. 1, with its central and larger portion longitudinally slit, by enlarging and shaping the slit portion. The slit is enlarged by fixed and movable blades U<1>, U<2>, Fig. 7, and then the tube is placed between fixed and detachable dies A, B, Fig. 9, and smaller internal dies L, M carried by slides N, P which are expanded by a wedge to give the form T, Fig. 5, to the tube.
Patent GB-1414113-A (GB)
Title: Air duct and method of making same
IPC: F16L59/18
Filed: 1974-01-19
Abstract: 1414113 Pipe couplings JOHNS-MANVILLE CORP 19 Jan 1974 02607/74 Heading F2G In an air duct, a tapering sheet metal spigot 44 has resilient punched up tabs 50 to form a snap engagement with the inner rim of ring 24. After coupling, the joint may be sealed with conventional ducting tape. In forming the duct, the ends of helical reinforcement 26, of wire or glass filaments, are secured in loops 28 and 30 and scrim cloth is secured by adhesive to members 24, 26 and 42. A layer 34 of glass fibre insulating material is placed over the scrim and covered with a sleeve 36 of vinyl material.
Patent GB-1171211-A (GB)
Title: Improvements in and relating to Holders for Gem Stones
IPC: B23B31/20
Filed: 1967-01-18
Abstract: 1,171,211. Polishing gems. SPECTRUM DIAMONDS (PROPRIETARY) Ltd. 18 Jan., 1967 [2 Feb., 1966], No. 2644/67. Heading B3D. A holder for supporting a gem stone during polishing comprises a compartment 2 at its forward end adapted to hold a gem stone carrying pot 10 inserted therein, an outer ring 8 of electrically conducting material whose forward end 11 can be used as a guide for terminating polishing when it contacts a polishing surface, and means 7 for insulating the outer ring from a press pot inserted into the compartment. The ring 8 is axially adjustable along the wall 6 of the holder which receives the insulating means in the form of a nylon sleeve 7. A metallic sleeve is disposed in the sleeve 7 and is formed with the compartment 2 for receiving the press pot 10 which has fingers a, b, c for gripping a gem in a cavity at its end. The ring 8 is adjusted so that when polishing of the gem has been effected to a predetermined extent, its edge 11 contacts the polishing surface to make an electric circuit and terminate polishing. The length of the holder can be adjusted by a nut so that the variations in the projection of the gem from the press pot can be accommodated when the holder is mounted in a clamp. A tool may be passed through bores 1 and 9 to eject the press pot from the holder.