baber/WOPTO huggingface dataset:
Patent GB-408273-A (GB)
Title: Manufacture of carbocyanine dyes
IPC: C09B23/12
Filed: 1932-06-30
Abstract: Carbocyanine dyes.--By condensing an alkyl quaternary salt of a 2-methylthiazole with an ester of an orthoaliphatic carboxylic acid other than orthoformic acid, thiazolocarbocyanines substituted on the central carbon of the trimethine chain by an alkyl residue, are obtained.  By using an orthoformic ester in this reaction and working under certain conditions a neothiazolocarbocyanine dye may be obtained; this product appears to be a thiazolocarbocyanine dye substituted at the central carbon atom of the trimethine chain by a further quaternary alkylthiazyl-vinyl group (structural formul  are given).  An excess of the orthoformic ester and the use of a quaternary salt of the 2-methylthiazole formed from a dialkylsulphate or an alkyl-p-toluenesulphonate gives a preponderating yield of the neothiazolo dye admixed with the normal thiazolocarbocyanine dye; where separation is required this is effected by the use of suitable organic solvents followed by crystallization therefom. In examples: (1) 2 - methylthiazolemethyl - or ethyl-p-toluenesulphonate is refluxed in pyridine with triethyl orthoformate and the product treated with excess potassium iodide; extraction with acetone or acetone-methylalcohol removes the normal dye and the neothiazolo dye can be crystallized from the residue taken up in methyl alcohol; (2) 2.4-dimethylthiazole methyl-p-toluenesulphonate on similar treatment and separation yields a neothiazolo dye; using the quaternary salt formed from dimethylsulphate in this reaction, the normal dye is extracted with methyl alcohol and the neothiazolo dye recrystallized from the same solvent; using the quaternary salt formed from ethyl-p-toluenesulphonate in this reaction, the product is boiled in methyl alcohol, cooled to crystallize out the less soluble normal dye and the mother liquor further concentrated to yield the neothiazolo dye; (3) 2-methyl-4-phenylthiazole methyl and ethyl-p-toluenesulphonates on similar treatment and separation treatments to those above yield neothiazolo dyes; (4) 4 - phenyl - 2 - methylthiazole methyl - p - toluenesulphonate is boiled in pyridine with trimethyl orthoacetate and the product precipitated with potassium iodide to give 4 : 4<1> - diphenyl - 3 . 3<1> . 7<1> - trimethylthiazolocarbocyanine iodide; using instead of the orthoacetate trimethyl orthopropionate the corresponding 7-ethyl substituted dye is obtained. Specifications 232,740, [Class 2 (iii)], and 378,870 are referred to.
Patent GB-1501668-A (GB)
Title: Generation of permanent phase holograms and relief patterns in durable media by chemical etching
IPC: G03F7/26
Filed: 1975-05-02
Abstract: 1501668 Etching RCA CORPORATION 2 May 1975 [22 May 1974] 18553/75 Heading B6J [Also in Division G2] A material comprising a photosensitive layer coated on an etchable substrate is imagewise exposed and then developed and etched; the development and etching take place simultaneously or in a series of alternate incremental steps. The exposed material is either immersed in a bath which contains both developer and etchant or is repeatedly immersed alternately in a developer bath and in an etch bath. The development and etch rate may be selected to be equal so that there is a linear transfer of the pattern in the exposed photosensitive layer to the substrate. The method is useful for making durable holographic masters which can be used for replicating the hologram. The substrate may be glass coated with a metal or metal oxide, e.g. chromium or iron oxide. The photosensitive layer is a Shipley AZ 1350 photoresist and may be baked prior to exposure. The developer is Shipley AZ 303 developer and the etchants hydrochloric acid, sulphuric acid plus ceric sulphate, and hydrofluoric acid. The combined developer etch comprised the above developer and potassium ferricyanide. The above developer alone was used for an aluminium coated substrate, the sodium hydroxide content of the developer acting as the etchant.
Patent GB-1130319-A (GB)
Title: Device for applying a substance to slides in thin layer chromatography
Inventor: KORMENDI FERENC
IPC: G01N30/93
Filed: 1966-04-27
Abstract: 1,130,319. Coating apparatus. LABOR MUSZERIPARI MUVEK. 27 April, 1966 [13 May, 1965], No, 18560/66. Heading B2L. A device for applying a substance to slides is characterized by the provision of a guide way consisting of upper guide rails 10a, 10b defining a basic plane and deformable lower guide rails 12 elastically biased towards said upper guide rails, a feed hopper 13 having an outlet passage 13a for supplying substance on to a slide moving along said basic plane, the outlet passage 13a .being flush with respect to said basic plane, and actuating means advancing slides between the upper guide rails 10a, 10b and the lower guide rails 12 along said basic plane at uniform speed. The outlet of the feed hopper 13 is adjustable by a movable slider 15 actuated by pairs of eccentrics against biasing springs. The actuating means is preferably formed by a pressure fluid operated system comprising a piston 20 slidably arranged in a cylinder 21 and control means such as a four-way valve 22 for admitting and exhausting pressure fluid to and from, alternately, opposite sides of said piston. The piston 20 is connected to an advancing head 55 which advances slides 40 one at a time between the upper guide rails 10a, 10b and lower guide rails 12, from a stock of slides. The head 55 has cams which actuate, through lever systems, clamping jaws which clamp the lowermost but one slide 40<SP>1</SP> and raises it and all the slides above it slightly so that the lowermost slide is free to be fed into the guides. The stock of slides is then lowered and at the next operation of piston 20 the next slide is fed into the guides. Narrow auxiliary slides 60 are placed between slides 40 to close the outlet passage 13a of the hopper 13 between the passings of two subsequent slides 40.
Patent GB-1493595-A (GB)
Title: Radiography
IPC: G06T11/00
Filed: 1975-01-15
Abstract: 1493595 Radiography EMI Ltd 15 Jan 1975 [31 Jan 1974] 18618/77 Divided out of 1493594 Heading H4F The subject-matter of this Specification is identical with that described in Parent Specification, but the claims are concerned with the production of beam data signals representing the absorption along beam paths of substantially uniform width by combining the beam data signals relating to the narrow but divergent beams at angular positions 180 degrees apart.
Patent GB-751179-A (GB)
Title: Multichannel radio signalling system
IPC: H04B1/69
Filed: 1954-06-25
Abstract: 751,179. Radio signalling; radio navigation. STANDARD TELEPHONES & CABLES, Ltd. June 25, 1954 [June 29, 1953], No. 18683/54. Classes 40 (5) and 40 (7). In a multichannel system, stated to be applicable to providing a plurality of radio beacons of the type described in Specification 631,172, a spectrum of spaced carriers, all bearing the same signal, is transmitted for each channel, the spectra of frequencies corresponding to the respective channels being so interleaved that between each pair of adjacent frequencies of each channel there lies a frequency belonging to each of the other channels. Each transmitter comprises a carrier oscillator of the lowest frequency to be transmitted modulated by a harmonic-producing oscillator of the frequency by which the transmitted frequencies are to be spaced in a single side-band modulator of the type described in Specification 260,067, [Class 40 (v)]. The resulting sum frequencies are fed to a limiter to equalize their amplitudes, a wide-band filter to remove unwanted frequencies, and thence to the transmitter output stages, Fig. 2 (not shown). In one receiver embodiment, the incoming signals from aerial 12 and filter 13 are fed to mixers 14 ... 21 supplied by local oscillators 22 ... 29 respectively which may be jointly adjusted by dial 31 to give the same intermediate frequencies from the mixers whichever transmitter is being received. The intermediate frequencies are selected by filters 32... 39 respectively, the combined outputs of which are detected in circuit 41 and fed to the utilization device. In a second receiver embodiment a single variable local oscillator is used and the heterodyning frequencies are derived from the series of cascaded auxiliary mixers and filters, Fig. 4 (not shown). When used as beacon channels, the transmitters are stated to reduce error due to night effects and wave reflections.
Patent GB-751010-A (GB)
Title: Improvements in or relating to the cooling of turbine blades
Inventor: CHAMBERLIN REGINALD HENRY DOUG
IPC: F01D5/08
Filed: 1953-07-06
Abstract: 751,010. Turbine blade cooling. NAPIER & SON, Ltd., D. June 23, 1954 [July 6, 1953], No. 18735/53. Class 110(3) In a turbine blade for a gas turbine engine rotor, the root portion is so formed that a cavity is provided between it and the adjacent side of the root portion of an adjacent blade mounted in the rotor disc, the cavity having inlet and outlet passages by which cooling air (or other gas) can enter and leave continuously during operation. The inlet and outlet passages are situated at points in the cavity such that air will tend to circulate or swirl around the cavity before passing out through the outlet passage. The blade shown has a vane portion 11, a platform 12, a fir-tree root portion 13 and a part 14 between the root 13 and the platform 12. Square-shaped recesses 22 are formed in the two faces of the part 14, the adjoining recesses of a pair of adjacent blades forming a cooling air cavity. Air is supplied to the cavity through a passage formed by a cutaway portion 24 and leaves by a passage formed by a cutaway portion 26, the air moving through the cavity with a swirling motion. The upstream face of the part 14 is formed with inclined flanges 20 which together with flanges of adjacent blades form a series of spiral-shaped cooling air passages as described and claimed in Specification 751,011.
Patent GB-479268-A (GB)
Title: Improvements in or relating to external combustion air or gas engines
IPC: F02G3/00
Filed: 1937-07-07
Abstract: 479,268. Hot air and gas engines. NEW ENGINE CO., Ltd., and MALONE, J. F. J. July 7, 1937, No. 18882. [Class 7 (i)] [Also in Group XXVI] In a hot air or gas engine having a number of cylinders 4 to which the air or gas is admitted at substantially equal pressures, the cylinder spaces 4a at the back of the engine pistons 9 communicate with each other by ducts 11 in a junctiom member 1, which may serve to support the cylinders and is mounted on upright columns 2. As shown, the engine comprises high-pressure cylinders 4 and low-pressure cylinders 5, the cylinder spaces behind the pistons of each stage being connected by ducts 11 in the member 1 as shown in Fig. 4 ; the member 1 may contain a balancing gas which may be kept at a suitable pressure by connecting the spaces 4a, 6a, and 11 to the inlet pipe of the expansion or the compression cylinder, and the gas may be cooled by water or a gas circulating in a jacket 1a. A power piston 9 in each cylinder 4 or 5 is connected by a hollow member 16 to a compressor piston 10 in a cylinder 6 or 7 mounted on the junction member 1. The compressor cylinder may be cooled by a water or other jacket 30 and pipes 31. The pipes 31 may be wound to form pads each encircling only a part of the cylinder. A jacket 18 mounted on the piston 9 is provided with piston rings 19 mounted, as shown in Fig. 6, on either side of an arm 27 on an annulus 26 carried by a stud having a portion 25 of pear-shaped section. The piston rings 17 on the compressor piston 10 are similarly mounted. The piston rod 12 is sealed by a gland 15 comprising frusto-conical sealing rings 21, Fig. 5, on either side of a member 22 for the admission of lubricant, and between bushes 23 held against axial movement by a gland flange 24 and serving to prevent damage to the rings 21 on the rolling of a ship on which the engine may be used. The upper part of each cylinder 4, 5 may be covered with a heat-insulating layer of magnesia and the lower part cooled by an air jacket 32.
Patent GB-781584-A (GB)
Title: Manufacture of vinegar
Inventor: SHIMWELL JOHN LESTER
IPC: C12J1/00
Filed: 1954-06-28
Abstract: In making vinegar by acetification of alcoholic liquid, there is used a pure culture of Acetobacter operans prepared by plating out acetic acid bacteria in an actively multiplying condition, obtainable for example from a trickling process acetifier, on a solid medium such as beer wort agar or yeast extract-calcium lactate agar to separate the individual cells, incubating until visible colonies appear, selecting colonies of bacteria having the morphology and cultural characteristics described in the Specification, and selecting therefrom the strains capable of producing acetica acid from an alcoholic liquid at outstandingly high rate, e.g. capable of attainment of 9 per cent concentration of acetic acid in 24 hours at 30 DEG  C. from an alcohol initially of up to 7 per cent strength fed over beech wood shavings at the rate of not less than 20 kg./cubic metre under conditions of adequate aeration.
Patent GB-295812-A (GB)
Title: Improvements in or relating to filters or percolators
IPC: A47J31/053
Filed: 1927-07-18
Abstract: 295,812. Brooks, C. G. July 18, 1927. Infusers.-A filtering device for use with coffee percolators, tea strainers, &c., comprises a flat circular perforated base 1 having an upstanding member 2 on which is successively fitted a filter paper or the like 5 and a flat circular perforated plate 6 both apertured at the centre to pass over member 5 and rest on the base 1. The plates 1, 6, may be of porcelain or china, or of porous material which may be glazed or partly glazed, and may have grooved surfaces. Gripping means, such as a groove 2 , may be provided on member 2. The device may be placed in the funnel 8, Fig. 4, of a coffee percolator and the coffee and finally the hot water added, the infusion passing to a receptacle 9.
Patent GB-268204-A (GB)
Title: Improvements in or applicable to clay bodies or material for making tiles, slabs, sanitary, and other ware
IPC: C04B33/13
Filed: 1926-07-30
Abstract: 268,204. Gourdjian, W., and Jones, G. L. July 30, 1926. Patent abandoned on opposition. Clay compositions.-Gum arabic is incorporated with clay for making tiles, bricks, slabs, pottery and like articles. For tiles, 1¢ lbs. of gum arabic is mixed with 100 lbs. of tile clay and 9 gallons of water, the gum being dissolved prior to mixing in a small quantity of water. For sanitary ware 1“ lbs. of gum is used to 100 lbs. of clay, while for pottery 1“ lbs. of gum is used to 100 lbs. of potters clay. The proportions may be varied slightly.
Patent GB-239341-A (GB)
Title: Rotary detector for use with crystal wireless receiving sets
IPC: H01L29/00
Filed: 1924-08-14
Abstract: 239,341. Stuart, W. Aug. 14, 1924. Crystal detectors.-The contact member of a crystal detector is in the form of a wheel or disc A with teeth or points round its outer edge and mounted to rotate on an adjustable arm F so that it can be rolled over the surface of the crystal E. The arm; F is guided by a fixed bracket Hand is notched to engage a sliding bracket I. A screw K working in a nut J adjusts the position of the bracket I and arm F. The pressure of the contact A on the crystal is varied by a jockey weight M. The crystal E is held against one side of the cup B by a three-armed member C. The arms slide in slots in the walls of the cup and the crystal is gripped by the central arm under the tension of a spring N embracing the cup.
Patent GB-680678-A (GB)
Title: Improvements in or relating to drying apparatus
Inventor: FLETCHER LOUIS ROBERT
IPC: F26B9/06
Filed: 1950-08-02
Abstract: 680,678. Drying-apparatus. CURRAN ENGINEERING, Ltd., E. Aug. 2, 1950. No. 19284/ 50. Class 34 (ii) In drying-apparatus having a blower arranged to force a gaseous drying medium through a duct A to a space below the perforated flow of a drying chamber so that the drying medium passes through the material supported on the floor, a partition 8 is disposed longitudinally of and substantially centrally in the duct. The walls of the duct diverge from the inlet end thereof.
Patent GB-299082-A (GB)
Title: Automatic photographical washer and drier for plates, films and prints
IPC: G03D15/02
Filed: 1927-07-20
Abstract: 299,082. Broder, J. S. July 20, 1927. Washing and drying apparatus, with revolving holders.- A carrier f, Fig. 1, for plates, films or papers, alternative constructions for which are described, is mounted on a vertical spindle e which is rotated within the tank a by a water reaction turbine comprising radial tubes h having tangential discharge outlets h<1> over the carrier, and mounted on a rotatable hollow sleeve connected to the spindle e. The sleeve g passes through a bearing c on a bridge piece d spanning the tank a, and through a stuinng-box g<1> at the upper end of which is a fixed water connection g<2>. The lower bearing b of the spindle e is packed with grease. A fan l for drying purposes, is mounted on the tank and driven from the sleeve g by bevel gearing p, o, which can be disengaged, when the fan is not required by shifting the fan shaft m. The tank a has upper and lower discharge outlets j, j<1> and an outlet regulating tap. In one construction of carrier the lower and upper plates i, i<1> are adjustably spaced by threaded rods i<2>; the upper surfaces of the lower plate has radial grooves; the upper plate i<1> has corresponding slots; and a plate i<4>, also radially slotted, is rotatably mounted on the upper plate by lugs and can be rotated to contract the upper slot. Stepwise slots may be formed in the upper plate i<1> for plates or carriers of different sizes. A modified cylindrical carrier q, Fig. 4, for films has perforated walls, the central hub q<1>, and the outer wall being formed with vertical grooves q<3> to maintain films q<2> in arched formation. A further modified carrier for films and prints comprises a series of connected perforated drums r, Fig. 6, fitted with lugs r<1> or other means for holding the films or prints, and a different number of films can be mounted on each drum.
Patent GB-333011-A (GB)
Title: Improvements in thermionic cathodes of vacuum electric tube devices
IPC: H01J1/24
Filed: 1929-01-24
Abstract: 333,011. Cachemaille, A. S., (Westing- house Lamp Co.). June 24, 1929. Vacuum tubes.-In the construction of indirectly heated cathodes containing a heating element surrounded by an insulator, e.g. quartz, porcelain thoria, or the material known under the registered trade mark " Isolantite," erosion and consequent failure of the heating filament, due to deleterious gases, such as water vapour and oxides of carbon, evolved by the insulator, are prevented by the provision of a protecting material between the filament and the insulator'which absorbs and retains these gases. As protecting material, elements such as chromium, thorium, zirconium, uranium, tantalum, boron, silicon, vanadium and titanium are employed with a heater filament of tungsten, molybdenum or tantalum. Preferably, chromium is the element employed and this may be plated on the filament but, to prevent the wire from being rendered brittle, chromium powder is mixed with a binder and the wire is coated by applying or spraying, the binder being a cellulose derivative dissolved in amyl acetate. As shown in Figs. 1 and 3, a filament 5 is coated with a layer 12 of the chromium powder and binder, bent to hair pin form and inserted in holes 8, 9 in. an insulator 10 which is enclosed in a metal tube 11 coated , with emissive material 11<1>. The cathode is then assembled in the valve which is exhausted and the filament heated, the heated chromium uniting with the gases evolved from the insulator. In some cases the chromium compounds formed are fused to the wall of the insulator thus allowing freedom of movement to the filament. The chromium powder may be in a partially oxidized condition, and the protective material may be applied in the first instance to the wall of the insulator.
Patent GB-147461-A (GB)
Title: Improvements in methods of preserving perishable products
IPC: A23L3/3418
Filed: 1920-07-07
Abstract: 147,461. Clinton, T. J. Aug. 7, 1914, [Convention date]. Void [Published under Sect. 91 of the Act]. Air, cooling; ventilating conduits and inlet and Outlet ports, arrangements of. - Relates to arrangements in connexion with refrigerator-cars or other cooled preserving-chambers for discharging foul air or gases from the storage space and admitting fresh air in small quantities. The invention is described as applied to a refrigerator-car having double walls 8 9 lined on the inner surface, and ice bunkers 3, 4 extending across each end of the storage space 1. An air space 11 is formed at each end between the inner insulated wall 9 and a third wall 10 cooled by the ice. The fresh air is admitted through a small opening 12 to the air space 11, and is cooled before passing into the storage space through an opening 15 slightly above the opening 12. The foul air rises in the storage space and passes between a false ceiling 16 and the ceiling proper 13 to openings 19 leading to outlets 20 in the roof of the car. The outlets 20 and preferably the inlets 12 are screened to exclude dust. The false ceiling is provided with staggered longitudinal strips 17 to form flues, and with a central cross division 18. The arrangement may be applied to chambers having cooling- coils instead of ice. bunkers.
Patent GB-1119694-A (GB)
Title: Improvements relating to lithographic printing plate image lacquers
IPC: C09D127/08
Filed: 1966-05-03
Abstract: A lithographic printing plate image lacquer comprises a coloured two-phase liquid composition, having an aqueous phase containing a water-soluble thickener and a non-aqueous phase containing a vinylidene chloride-acrylonitrile copolymer in a water-immiscible volatile solvent.  The thickener may be a maleic anhydride-vinyl methyl ether copolymer in the amide or half amide-ammonium salt form, polyacrylic acid, polysaccharides or gum arabic; sodium lauryl sulphate, sorbitan monooleate or palmitate, or the coconut oil acid ester of sodium isothionate may be added as a wetting agent.  The copolymer may be extended with dioctyl phthalate or para toluene sulphonamide formaldehyde condensate.  The colour is preferably a phthalocyanine blue pigment. The polymer solvent is 3-heptanone, methyl isobutyl ketone or methyl isoamyl ketone.
Patent GB-280267-A (GB)
Title: Rotary steam engine
IPC: F01C1/344
Filed: 1926-08-06
Abstract: 280,267. Bonham, J. Aug. 6, 1926. Fixed-abutment type; valve-gear.-A rotary engine of the type comprising a peripherally grooved rotor h with radially-sliding vanes j pressed outwardly by springs and withdrawn to pass an abutment g on the casing which projects into the groove, is provided with eccentric guide rails m situated on the casing and within the working space which press back the vanes j into the rotor when passing the abutment g and then allow the vanes to extend again into the working space. Inlet and exhaust ports n, o are provided for one direction of rotation and ports n<1>, o' for the reverse direction, a valve controlling the connection of the ports to the supply and exhaust pipes. For compound working a number of engines of increasing dimensions are arranged in series.