baber/WOPTO huggingface dataset:
Patent GB-743915-A (GB)
Title: Improvements in or relating to the manufacture of electrical resistances for domestic heating
Inventor: DICKINSON GEORGE ALFRED
IPC: H01B1/00
Filed: 1953-03-02
Abstract: 743,915. Electric heating resistances; radiators. PILKINGTON BROS., Ltd. Feb. 17, 1954 [March 2; 1953], No. 5817/53. Drawings to Specification. Class 39(3). A heating resistance is produced on a toughened glass sheet or other refractory surface by coating the whole of the surface to be covered with the resistance in molten form e.g. by a spray, covering the deposited metal with a resist through a silk screen to produce on the metal the desired pattern for the resistance, chemically removing the uncoated metal by a solution of an inorganic acid and a salt of a metal lower in the electromotive force series than aluminium and then removing the resist. The resistance metal e.g. aluminium or an aluminium alloy is removed by hydrochloric acid containing a salt of a metal lower in the electromotive force series of elements than aluminium e.g. about 5 per cent of copper sulphate. The resist may be a bituminous paint. The pattern is a narrow zigzag ribbon or may be ornamental e.g. a regimental crest. Terminal pads are sprayed on where required, so that only part of the resistance need be used. A radiator may comprise two parallel plate glass sheets, one having the resistance on its inner surface mounted on a base in a frame completely surrounding the edges of the glass. The frame is of sheet metal or thermosetting plastic and is perforated at the top. According to the Provisional Specification, a solution of caustic soda is used to remove the metal in the uncoated areas. Specifications 455,152 and 602,492 are referred to.
Patent GB-1378651-A (GB)
Title: Nozzle mixing burners
IPC: F23D14/22
Filed: 1972-03-02
Abstract: 1378651 Gas burners BRITISH GAS CORP 2 March 1972 [2 March 1971] 5819/71 Heading F4T A burner comprises an air inlet tube 1 surrounding a gas inlet tube 2 which is heated at an end having adjacent gas outlet apertures 4, and a dished air baffle 5 with a castellated rim and air holes 8 extending radially outwards from tube 2 to partially restrict the air inlet tube 1. The gas apertures 4 register with the castellations 6. A gas pilot tube 9 runs coaxially up tube 2 and passes through the end 3, a circular baffle plate 10 seals the end of the tube 9 which has gas aperture 11 in its wall between the baffle plate 10 and 3. A spark ignition device 12 held by a clamp 14 passes through one air hole 8 in the baffle 5 and is positioned so as to arc to baffle plate 10. A flame probe 16 attached to the tube 2 passes through another air hole 8 and projects down stream of the baffle plate 10.
Patent GB-1254061-A (GB)
Title: Optical separation of methionine nitrile
IPC: A47B3/00
Filed: 1969-02-04
Abstract: 1,254,061. Optically active methionine nitrile. STAMICARBON N.V. 4 Feb., 1969 [8 Feb., 1968], No. 5958/69. Heading C2C. Optically active methionine nitrile is prepared by converting a mixture of L- and D- methionine nitrile (which may be the racemate) wholly or partly into a salt of methionine nitrile with optically active γ-phenoxy propionic acid and subsequently separating, by a method utilizing the differential solubility of the diastereoisomers, e.g. by crystallization, a fraction mainly consisting of one of the diastereoisomers of the salt. The nitrile salt can be split into its components by basification with ammonia, or hydrolysed to the corresponding optical form of methionine or methionine amide.
Patent GB-679746-A (GB)
Title: Improvements in magnesium base alloys
IPC: C22C23/06
Filed: 1950-03-09
Abstract: A magnesium-base alloy consists of 0.5-10 per cent of Nd either alone or with Pr, the balance being Mg of at least 99.7 per cent purity, the ratio of the contents of Nd and Pr, when both are used, being between 10 : 1 and 1 : 10.  The alloys may also include amounts of other rare earth metals as impurities, particularly La up to 10 per cent of the total rare earth metal content.  Examples are given of alloys according to the invention containing small specified quantities of Ce, La, Al, Fe, Mn, Pb and Si as impurities.  The alloys may be made by melting Mg in a crucible using a thickening foundry flux, such as one containing 20 per cent KCL, 50 per cent MgCl2, 15 per cent CaF2 and 15 per cent MgO, in amount from 1 to 3 per cent by weight of the melt.  Before the crust-like cover of dried flux forms the rare earth metals are added in a ladle which is moved about in the melt and the resulting alloy is cast as soon as possible.  Reference has been directed by the Comptroller to Specification 637,040.
Patent GB-889281-A (GB)
Title: Improvements in and relating to objectives
IPC: G02B13/00
Filed: 1958-02-25
Abstract: 889,281. Optical objectives. FARRAND OPTICAL CO. Inc. Feb. 25, 1958 [Feb. 25, 1957], No. 6073/58. Class 97(1). A wide aperture objective comprises, in front of the stop, a compound collecting member M 1  made up of two simple meniscus lenses, and a negative meniscus component C, and, behind the stop, a second negative meniscus component C 2  which like the first negative meniscus component is concave to the stop, a negative component C 3  of unequal surface curvatures and a second compound collecting member M 2 . In this objective the sums of the surface refractive powers of the members and the components are related to the power of the objective as follows:- while the sum #  (C 1 , C 2 ) of the powers of the surfaces bounding the stop are related to the objective power by the relation 2.5# < -# (C 1 , C 2 ) < 4.5#. The component C 1  is made up of two elements of opposite power which may be cemented together or, as shown, slightly spaced apart. The front elements of member M 2  may be spaced from the negative component C 3  or cemented thereto. Preferably a field flattening lens L F  is added to the objective. Optical data are given in the Specification for two examples. Specification 439,142 is referred to.
Patent GB-1210391-A (GB)
Title: Improvements in or relating to the coating of paper
Inventor: WINDLE WILLIAM
IPC: D21H19/40
Filed: 1967-02-08
Abstract: 1,210,391. Coating paper. ENGLISH CLAYS LOVERING POUCHIN & CO. Ltd. 29 Jan., 1968 [8 Feb., 1967], No. 6114/67. Heading B2E. [Also in Divisions C3 and C4] Paper is coated with an aqueous composition containing an adhesive and dispersed pigment, the pigment comprising (a) clay, at least 50% by weight of which is #2Á, and (b) at least 25% by weight natural chalk whiting, at least 30% 'by weight of which is <2Á. The adhesive may be starch, gelatin, casein and/or a synthetic resin latex. The paper is coated by a trailing, blade apparatus and then lightly supercalendered to give a matt finish, i.e. a gloss of not more than 15 Tappi units. In a microcontour test, excess of a non-absorbent ink is applied to the coated paper by means of a bar applicator and the inked paper is then wiped with a soft cloth and the ink is only left in surface holes and irregularities.
Patent GB-587575-A (GB)
Title: Improvements in fluid (e.g. water) volume control devices
IPC: G05D16/10
Filed: 1944-04-03
Abstract: 587,575. Fluid-actuated valves. BRITISH THOMSON-HOUSTON CO., Ltd. April 3, 1944, No. 6192. Convention date, April 7, 1943. [Class 135] A valve for controlling a constant flow from an inlet 13 to an outlet 14, despite variations of inlet pressure comprises a piston 16 which is loaded by springs 20, 21 to bring a port 29 in the skirt of piston 16 in line with the outlet port 12: The port 29 is of the form shown in Fig. 3, having wide, tapering, and narrow, sections 32, 33, 34 respectively, whilst the outlet port 12 has a straight edge 30 at the top coincident with the top edge of port 29 when the valve is in the full open position. Any increase in inlet pressure moves the piston 16 against the springs to effect a corresponding closing movement of the ports 29, 12. A gasket 19 seals the top edge of the piston 16 and the spring 21 is made lighter than spring 20, so that movement of the valve on charges of inlet pressure is greater on low pressures than on higher pressures.
Patent GB-1181437-A (GB)
Title: Process for the preparation of 2,3,5-trimethyl phenol.
Inventor: WEGHOFER HANS JOHANN MATTHIAS
IPC: C07C37/16
Filed: 1967-02-09
Abstract: 1,181,437. 2,3,5-Trimethyl phenol. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 20 Dec., 1967 [9 Feb., 1967], No. 6269/67. Heading C2C. A process for the preparation of 2,3,5- trimethyl phenol comprises reacting isophorone with a methylating agent, e.g. methanol in the gas phase at a reaction temperature of at least 500‹ C. in the presence of a catalyst comprising either (a) alumina, chromium (III) oxide and, based on chromium (III) oxide, 15 to 40 mole per cent of an alkali metal oxide, preferably potassium oxide or (b) 35% to 45% by weight of chromium (III) oxide and 45% to 60% by weight of copper (I) oxide if desired together with 7% to 15% by weight of barium oxide. A fixed or fluid bed reactor may be used. An example is furnished.
Patent GB-278583-A (GB)
Title: Improvements in or relating to oil engines
IPC: F02M59/02
Filed: 1927-03-08
Abstract: 278,583. Senior, H. V., and Bell, W. T. March 8, 1927. Cam-actuated pumps; relief devices; multipledelivery piston pumps; valve-gear; valves, arrangement of.-Fuel is fed to a multi-cylinder internal-combustion engine by a single pump 1, 2 and a multiple-valve distributor 7 connected by pipes 11 to the cylinders. The pump plunger 2 is operated by a sliding cap 6 on the cylinder reciprocated by a cam 25, and draws fuel into the barrel 2 through inlet valves 5, and delivers it past valves 9<a> into a distributing chamber R cut off from the pipes 11 by lift valves 10. The valves 10 are held to their seats by springs 12 and are opened in succession by a. rotating cam 17 driven by the pump shaft 21 and engaging balls 16 which are in contact with caps 15 on the stems of the valves. The chamber 8 has a relief valve 26. The plunger 2 makes two strokes for each rotation of the cam 17. The valves 9<a> may be omitted. Specification 266,407 is referred to.
Patent GB-499078-A (GB)
Title: Improvements in control devices for change-speed gears
IPC: F16H61/02
Filed: 1938-03-01
Abstract: 499,078. Controlling change speed gearing. TENNANT, W. J. (Maybach- Motorenbau Ges.) March 1, 1938, No. 6447. [Class 80 (ii)] In a control device for the power operation of change-speed gears wherein several transmission stages must be changed to vary the speed ratio, the transmission stages are controlled by members combined into two groups, requiring respectively a retardation or an acceleration of the driving clutch members. These two groups are prevented from operating simultaneously, although the control members of each group are combined to form a common main control member. The gear-clutch. shiftlevers are connected to shafts 22, 24, 27, Fig. 1, with arms 35, 45, 55 coupled to pistons 38, 48, 58 in cylinders 37, 47, 57, the indications B, V denoting that a transfer of a piston to that end is accompanied by an acceleration or retardation gear change. The conduits 140, 150, 160 are controlled by a valve 190 and 139, 149, 159 by valve 200, the pressure main 187 being connected to both valves. The housing 210 has slide valves- 151, 161 connected to cylinders 37, 47, 57 by conduits 207, 208, 209 and by conduit 192 to the piston 181 of a shut-off valve 180 in the supply main to valve 190. As shown, the pistons are set for second speed but valves 190, 200 have been set ready for changing to third speed. For this, pistons 38, 48 must be moved to the left, as by the gear shown in Specification 496,828; thus in valve 190 conduit 150 is connected to passage 191 and in valve 200 conduit 139 is connected to main 187. Valve 151 is first moved to the right to connect conduits 139, 207, 192 to close valve 180, piston 38 then moves to the left to break this connection and allow valve 180 to open which causes piston 48 to move to the left, but movement of piston 58 is prevented by valves 151,161. Fig. 3 shows a control for a gear having at least six transmission stages. The control valves 241 ..246 are loaded by springs and are moved by levers 247..249 actuated by cam discs on a common hand-operated spindle, each valve being open when engaged by a lever. A shut-off valve 264 is provided. The conduits 281 .. 286 lead to the gear-changing cylinders, and 261 to the pressure main, conduits 281, 283, 285 corresponding to 140, 150, 160 of Fig. 1, and 282, 284, 286 to 139, 149, 159. In an electrically operated gear-change, the valves are replaced by electromagnets, the conduits by leads, and the distributer valves by contact plates.
Patent GB-944013-A (GB)
Title: Improvements in paper
IPC: C09J7/21
Filed: 1960-02-24
Abstract: Gum karaya is diacetylated partially or completely by adding it slowly with rapid mixing to a dilute aqueous solution of ammonia. The mixture is aged for three hours at room temperature and is then a ropey, syrupy liquid.ALSO:Pressure-sensitive adhesive tape, e.g. for masking or for labels, is made from a paper which has a superfine cr<\>zepe structure, one side having rounded cr<\>zepe ridges and the other side being flatter and having minute cup-shaped pockets.  The paper is made from a furnish containing deacetylated gum karaya, is cr<\>zeped while still wet, dried, calendered and impregnated with a butadiene-acrylonitrile copolymer.  It may then be backsized with urea-formaldehyde plasticized with a castor-oil-modified alkyd resin, followed by a further low-adhesion backsize of octadecyl acrylate-acrylic acid copolymer.  The other side may be primed with polychloroprene and phenol-aldehyde resin, and then coated with a pressure-sensitive adhesive of the rubber-resin type.ALSO:A porous creped paper is made from a furnish containing water-dispersible, deacetylated karaya gum, and creped while still wet, e.g. at a wet press.  It has a superfine crepe structure, one side having rounded crepe ridges and the other side being flatter and having minute cup-shaped pockets.  The paper may be calendered after creping, and may then be impregnated with a butadiene-acrylonitrite copolymer. The product may be used for making pressure-sensitive adhesive tapes for masking or labels.
Patent GB-645290-A (GB)
Title: Liquid level indicator for hydraulic operating mechanisms
IPC: G01F23/70
Filed: 1948-03-02
Abstract: 645,290. Hydraulically operated brakes. HILLCOAT, E. March 2, 1948, No. 6567. [Class 103 (i)] [Also in Group XVIII] A hydraulically operated braking system having an electrical low level warning device in a liquid storage tank 2 [see Group XVIII], comprises a cylinder 3 communicating through orifices 34 and 35 with the tank 2. Pressure exerted on a head 14 advances a piston 4 against a spring 22 to force liquid in the cylinder 3 to open a valve 26, whereby the liquid is delivered to the brake cylinders via a conduit 30. Upon release of pressure at 14, the spring 22 returns the piston 4 and liquid passes through orifices 8, 9 in it and past a flexible element 21 to enter the part of the cylinder 3 in front of the piston head. Liquid returning from the conduit 30 forces open a valve 23 against a spring 27 and excess liquid in the cylinder 3 is returned to the tank 2 via the orifice 34.
Patent GB-880940-A (GB)
Title: Improvements relating to flow regulating devices
Inventor: BRAHM CHARLES BERNARD
IPC: G05D23/185
Filed: 1959-02-25
Abstract: 880,940. Gas-turbine plant. UNITED AIRCRAFT CORPORATION. Feb. 25, 1959, No. 6567/59. Class 110 (3). [Also in Group XXIX] A gas-turbine fuel control comprises a flow regulating valve operated by a double-acting piston the pressures on both sides of which are controlled by variable orifices responsive to variable conditions and the pressure on one side of which is controlled by a variable orifice responsive to the position of the piston. In the gas-turbine fuel control unit 40, fuel enters at 24 and leaves through an outlet 34 at a rate determined by the position of a regulating valve 62, 64 operated by a double-acting piston 58. The pressure on the left side of the piston 58 is, for steady state conditions, a function of the ratio of the orifice areas A1 and A2 and that on the right side of the piston is a function of the ratio of the orifice areas A3 and A4. The orifice A1 is controlled by a turbine speed governer 84 the speeder spring of which is manually adjustable. The orifice A2 is controlled by compressor inlet temperature-sensing means 90, 28, 92; the bellows 98 providing a temperature connection. The orifice A4 is controlled by compressor discharge pressuresensing means 102, 106 and the orifice A3 is controlled by a valve member 62 on the pistonrod 60. The pressure drop across the valve 62, 64 is kept constant by a diaphragm actuated regulating valve 110.
Patent GB-930331-A (GB)
Title: Apparatus for collecting lint
IPC: D01H11/00
Filed: 1960-02-25
Abstract: 930,331. Textile cleaning machines. AMERICAN MONORAIL CO. Feb. 25, 1960 [Aug. 6, 1959], No. 6659/60. Class 120 (3). [Also in Group XXVIII] A lint-collecting apparatus comprises floorengaging suction nozzles 19, Fig. 2, at the ends of vertical hoses 17 flanking a row of spinning machines 1, and connected at their upper ends by inclined tubular branch ducts 16 to a suction fan casing 12 carried by trucks 8 driven along overhead rails 7, and each duct 16 has a transverse lint-collecting screen 30 and a hinged door 35 which when the trucks pass a fixed cam bar 40 are opened to allow engagement with the dust-laden side of the screen of the upper end of a fixed vertical suction hose 53 connected at its lower end to the header 52 of a vertical hose 51 connected to a combined lint storage and fan chamber 50. Door operation is effected by engagement of the cam 40 with a roller 39, Fig. 4, at the end of a lever 37 pivoted to the branch duct 16 and connected by a link 36 to the door 35. In a modification lint is collected on the uppermost face of the screens 30<SP>1</SP>, Fig. 6 (not shown) and reverse flow suction air is provided through upwardly extending branch ducts 53 (not shown) connected to the header of a vertical hose 51 disposed at the side of the row of machines and beyond the adjacent movable hose 17. Specification 930,332 is referred to.
Patent GB-510144-A (GB)
Title: Improvements relating to locking nuts
IPC: F16B39/12
Filed: 1939-03-01
Abstract: 510,144. Locking nuts. CHURCHILL MACHINE TOOL CO., Ltd., and ASBRIDGE, H. H. March 1, 1939, No. 6725. [Class 89 (i)] A self-locking fastening comprises two nuts spaced apart by bolts passing through one into the other. An adjustable roller bearing is shown with spaced nuts a, b which after adjustment are locked by bolts c passing through the nut a into the nut b.
Patent GB-830954-A (GB)
Title: Improvements in and relating to photographic projection printers
IPC: G03B21/20
Filed: 1958-03-04
Abstract: 830,954. Photographic projection printers. EASTMAN KODAK CO. March 4. 1958 [March 4, 1957], No. 6870/58. Class 98(1) A photographic projection printer comprises means for illuminating a transparency, the illuminating system being adapted to project a predetermined pattern of light on to the plane of the extrance pupil of the projection objective, said pattern including a predetermined amount of light inside the entrance pupil and a ring of light surrounding it, whereby optimum elimination of shadows on the image due to scratches on the transparency is obtained; a plurality of interchangeable objectives are mounted on a turret. As shown, several objectives such as 16 or 26, for different degrees of magnification, are mounted on a turret 50, 51, and can be rotated into the operating position, in which position the entrance pupils always lie in the same fixed plane. The transparency, mounted in a gate 13, is positioned in a plane conjugate to the image plane 17. Light from a source 10 passes through a system of condenser and field lenses 11, 12, 14, in which is incorporated the'transparent screen 19 shown in more detail in Fig. 3. The screen is embossed with tiny conical dots 31-37, of the order of a million per sq. in. These cones have a very obtuse apex angle, so that light rays passing through their sides are deviated by about 10 degrees, as shown by rays 30<SP>1</SP>, 30<SP>11</SP>. The cones are separated by flat areas 38 through which rays pass undeviated, as at 30. The effect of the screen is to allow part of the rays, shown by full lines, to proceed undeviated to the projection lens 16, and to deviate others, shown by broken lines, to form the surrounding ring of light required for scratch-mark elimination. Between 4% and 20% of the light proceeds directly into the lens 16, the remainder being deviated. The diameter of the light nng may be varied by axial movement of the screen, and the film gate is also movable axially. A formula is given relating the focal length of the objective lens with the magnification and other constants of the system.
Patent GB-789643-A (GB)
Title: Improvements in methods of cladding metals
IPC: B23K20/02
Filed: 1956-03-06
Abstract: 789,643. Making composite metal sheet; welding by pressure. LUKENS STEEL CO. March 6, 1956 [Aug. 5, 1955], No. 6954/56. Classes 83 (2) and 83 (4). In a method of cladding metals the assembled plates 16, Fig. 1, are tack-welded together at the edges and heated in a furnace 6 with an inert atmosphere such as nitrogen to a temperature of approximately 2200‹ F. and are then passed through an oxygen-free chamber 12 to a press 14 in which the parts are pressure-welded together. Steel or alloy parts to be bonded may be painted with nickel paint or be plated with nickel. The press dies 38, 40 may form the composite plates 16 to any required shape. Hinged doors 44 are provided at the ends of the furnace and at the exit from the chamber 12.
Patent GB-1091503-A (GB)
Title: Improvements in and relating to vapour generators
Inventor: CULVER LEONARD JAMES
IPC: F22B1/18
Filed: 1964-02-19
Abstract: 1,091,503. Steam generators. FOSTER WHEELER Ltd. Feb. 15, 1965 [Feb. 19, 1964], No. 6974/64. Heading F4A. A water-tube boiler adapted to be heated by waste gases entering at 17 or by a burner 21, or by both, comprises a stack of tubes 12 surrounding a central passage 14 to form a furnace, the tubes at the lower part of the furnace being spaced apart at 23 to form passages for the furnace gases to pass through the bank to the outlet 18. The bottom of the passage 14 is closed by a plug 16 so that the waste gases pass upwards through the bank to the outlet, the tubes being arranged close together at 22 to form a wall impervious to the gases. When the burner 21 is used the wall 22 is heated by radiation and the gases from the burner pass through the passages 23 and upwardly through the bank to the outlet 18. The tubes forming the impervious wall 22 are of flat spiral form spaced apart by circular tubes with outer and inner convolutions of diameter equal to the outer and inner diameters of the spiral tubes. The passages 23 are formed by circular tubes equal in diameter to the outer diameter of the spiral tubes. Radial supports 28 are provided for the tubes. Each tube is connected to a feed header 24 and a vertical steam and water separator drum 30, or the feed header may comprise a partitioned section of the drum 30. The separated water is returned to the feed header by  a pump. The tubes 12 may be all evaporating tubes or several banks of tubes arranged one on top of the other may serve as the evaporator, the superheater, and the economizer
Patent GB-237834-A (GB)
Title: Improvements in bowing guides for stringed musical instruments
IPC: G10D3/16
Filed: 1925-03-14
Abstract: 237,834. Schmidt, L. March 14, 1925. Violins &c., bow-guides for.-A bowing guide consists of two parts, one part 6 being of U- form and being attached to the end of the fingerboard, and the other part 9 projecting over the bridge 2 and being attached to the tailpiece. The part 9 consists of a tapering semi-cylindrical shell of celluloid, leather &c., attached to the tailpiece by a band 10 and press button.