baber/WOPTO huggingface dataset:
Patent GB-672664-A (GB)
Title: Improvements relating to projection type image-forming optical systems
IPC: H04N17/00
Filed: 1947-01-24
Abstract: 672,664. Optical - projection apparatus. PHILCO CORPORATION. Jan. 24, 1947 [Feb. 21, 1946], No. 2283/47. Class 97 (i). [Also in Group XL (b)] The apparatus comprises a primary image source, a screen, and a wide aperture optical system for projecting an image from said source on to said screen, the light transmission across a cross-section of the optical path of said system being non-uniform, said screen having a surface shaped to provide a light-directional characteristic affording compression in one direction of the light projected therefrom, a plurality of elongated elements on said screen effective to spread the projected light in a direction approximately at right angles to the first direction and a multiplicity of weak lightdispersive elements co-operating with said screen for spreading the light slightly in at least said one direction. The screen is preferably as described in Specification 6077/48 (as open to inspection under Sect. 91). In the television receiver shown, the image formed on the screen 14 of the cathode-ray tube 13 is projected optically by a Schmidt system with mirror 15 and correcting plate 16, the light beam being reflected from the mirror 17 on to the screen 18 in the hinged lid 11 of the cabinet 10. The cathode-ray tube is inclined to the axis of the mirror 15 to secure focusing all over the projected picture. Keystone distortion in the projected picture is avoided by pre-distorting the cathode-ray tube image. Geometrical data are given. An alternative optical system is that described in Specification 643,658. Specification 672,661 also is referred to.
Patent GB-959055-A (GB)
Title: 8-methylquinolyl-5-oxoarsine and method of producing the same
IPC: C07F9/80
Filed: 1962-01-22
Abstract: The invention comprises 8-methylquinolyl-5-oxoarsine of formula: <FORM:0959055/C2/1> and its acid addition salts.  It may be prepared by reducing 8-methylquinolyl-5-arsonic acid in an aqueous solvent at a temperature below 100 DEG C. with sulphurous acid or sodium thiosulphate. Preferably the reduction is carried out in acid aqueous solution using sulphur dioxide and potassium iodide. Suitable acid salts specified are the hydrochloride, hydrobromide, hydroiodide, sulphate, phosphate, acetate, benzoate, citrate, maleate, phthalate, tartrate, benzene-sulphonate, p-toluene sulphonate and sulphamate. The compound and its non-toxic addition salts may be orally in any of the usual pharmaceutical forms, if desired, in association with a pharmaceutical diluent or carrier, or mixed in animal feed.
Patent GB-889728-A (GB)
Title: Improvements in or relating to electrolytic capacitors
Inventor: EVERITT RONALD JOHN
IPC: H01G9/10
Filed: 1960-01-22
Abstract: 889,728. Electrolytic capacitors. DUBILIER CONDENSER CO. (1925) Ltd. Dec. 8, 1960 [Jan. 22, 1960], No. 2419/60. Class 37. A terminal and closure fitting for an electrolytic capacitor comprises a disc shaped member E3 of insulating material, e.g. a thermoplastic or thermosetting resin carrying a central conducting rivet E1. This rivet connects externally to a solderable wire E2 and internally to the anode wire C1 of the capacitor. The closure member carries a flange F to prevent arcing between the doubled-up wire C1 and the case (to which the cathode of the capacitor is connected), and a flange G to prevent short-circuiting between the rivet E1 and the capacitor roll. The closure member is fitted to the capacitor container by spinning over the edge B2, which grips the member E3 against projections B1, as shown.
Patent GB-439083-A (GB)
Title: Improvements in or relating to devices for the counter-pressure filling of vessels or containers, particularly bottles, with liquids
IPC: B67C3/06
Filed: 1935-01-24
Abstract: 439,083. Filling bottles &c. SOKAL, S., 1, Great James Street, Bedford Row, London.-(Holstein & Kappert Maschinenfabrik Phonix Ges. ; Dortmund, Germany) Jan. 24, 1935, No. 2439. [Class 125 (ii)] In counter-pressure apparatus for filling vessels, particularly bottles with liquid provided with a plug-cock for the control of liquids containing gas, wherein separate passages are provided for the admitted air, return air and liquid, and the return air passage is emptied into the filled vessel, the apparatus is arranged so that the passage for the liquid is opened earlier than the return air passage whereby frothing is prevented during the initial filling. The plug-cock 4 is provided with two crossing bores 14, 15 for the return air, or the return-air passage 9 is provided with branches 20, 21, so arranged that, as the plug-cock is turned for filling purposes, the liquid passage 10 is open before the returnair passage 9 is open to an extent determined by the overlap X between the bores or the offset of the passages 20, 21. A recess is provided in the plug-cock or the segment 16 is removed, to ensure complete draining of the return-air passages into the bottle. The sequence of operations is illustrated in Fig. 2 (not completely shown herein). The action of the plug-cock may be assisted by so constructing the operating means that the turning of the plug-cock is retarded after the opening of the liquid passage ; for example, in a machine in which the liquid container rotates the stops for operating the plugs are suitably shaped and may be resiliently mounted to impart the desired movement.
Patent GB-453328-A (GB)
Title: Improvements in pocket weighing scales
IPC: G01G19/00
Filed: 1936-01-27
Abstract: 453,328. Spring-balances. EXACT WEIGHT SCALE CO., 944, West 5th Avenue, Columbus, Ohio, U.S.A. Jan. 27, 1936, No. 2528. Convention date, Jan. 26, 1935. [Class 143] A pocket weighing-scale having the appearance of a fountain pen or a pencil comprises a hollow casing 1, a coil spring 16 supported by a vertically-adjustable screw 11, a clip 21 or other member for supporting a letter or other article to be weighed, and a nut 14 with ears 15 projecting between the convolutions of the spring so that the effective length of the spring may be varied. The clip is suspended from the spring by a calibrated strip 17 preferably rectangular in cross-section and slidable without rotation through a similar opening in the casing. The downward movement is limited by a stop 17a- A knob 10 formed on the screw 11 may be rotated to move the spring and calibrated strip bodily in a vertical direction for zero adjustment. A cap 7, when afterwards applied, bears upon the knob 10 and retains it in adjusted position. A cap 27 is placed over the lower end of the device before placing the same in the pocket.
Patent GB-1340638-A (GB)
Title: Skimming mechanisms
IPC: F27D3/15
Filed: 1972-01-19
Abstract: 1340638 Slag skimming apparatus LOUIS A GRANT Inc 19 Jan 1972 [19 Jan 1971 11 Jan 1972] 2630/72 Heading F4B A slag skimming apparatus comprises an extensible boom movably mounted on the support, a skimmer paddle on the end of the boom and drive means for extending the boom. The apparatus comprises a telescopic boom 12, Fig. 1 mounted to pivot in a vertical plane about an axis 15 mounted on a turntable 10. The inclination of the boom 12 is controlled by two pairs of hydraulic cylinders 22, one pair being arranged on either side of the boom and connected to the outer section of the boom to move it to its desired position and hold it there. A skimming paddle13 is pivoted to the end of the inner section 18 of the boom, which runs on rollers 20 within the outer section 17. The inner section carries racks 29 engaging driven pinions mounted on the outer section and driven by individual motors 31. The paddle 13 is moved by a rod 36 connected to a piston and cylinder 35 at the opposite end of the inner section 18, supply pipes to the cylinder being wound on to an automatic reel 38. A stop on the boom engages a piston 44 to prevent over extension of the inner boom, cylinder 43 cushioning the stop. In another embodiment, Figs. 2A and 8, the inner boom 17<SP>1</SP> runs on flanged rollers 20<SP>1</SP> adjustably mounted in bracket 26<SP>1</SP> to project into the outer boom. One roller at the front and one at the back can be adjusted in height by means of screws 29<SP>1</SP>, these rollers, and the intermediate rollers being secured at the desired level by screws 28<SP>1</SP> engaging the brackets 26<SP>1</SP>. Roller chains 33<SP>1</SP> are secured to the upper face of the inner boom and co-operate with pinions 37 mounted on the outer boom section. Rollers 22<SP>1</SP> at the front of the outer boom prevent the inner boom 17<SP>1</SP> from rising from the rollers 20<SP>1</SP>, and stops cushioned by cylinders 87, 88 limit the travel of the boom section 17<SP>1</SP>. The skimming paddle is formed in two parts, the blade part 47 having channels engaging bars 57 on the pivot part. The automatic reel for the hoses for the pneumatic cylinder operating the paddle through links 68, 69 is mounted on the outer boom section, and the hoses enter the inner beam section through its side wall. By extending and retracting the boom and pivoting the skimmer paddle slag can be gathered and flicked from a ladle or furnace into a container, and the skimmer can be retracted and rotated on the turntable to allow easy access to the slag container, ladle or furnace.
Patent GB-706701-A (GB)
Title: Treatment of fibrous plant material for the manufacture of surgical wadding and surgical wadding made therefrom
IPC: D06M11/38
Filed: 1951-02-02
Abstract: Fibrous plant material other than cotton is rendered suitable for the manufacture of surgical wadding by treating it at atmospheric temperature with an aqueous solution of a water-soluble metallic salt neutral to phenolphthalein, the treatment being sufficiently prolonged to extract at least the greater part of the non-cellulosic cementitious material from the fibres.  The plant material may be flax (or flax waste), widoeri (Catatropis Procera), or rosella (Hibiscus Sabdaraffia).  The salt is preferably a salt of an alkali metal or an alkaline earth metal.  In the example, flax waste is immersed in a 5 per cent. aqueous solution of magnesium sulphate or of sodium bicarbonate for 72-120 hours at atmospheric temperature. The waste is then rinsed for a few hours in ordinary water at atmospheric temperature.  In order to remove any remaining non-cellulosic cementitious material, the waste is finally boiled for 2.5-3 hours in a 6-8 per cent. aqueous sodium hydroxide solution. Specifications 493,125 and 706,699 are referred to.
Patent GB-628189-A (GB)
Title: Improvements in or relating to safety control systems for fuel burners
IPC: F23N5/20
Filed: 1947-01-28
Abstract: 628,189. Lighting burners. MAY, P. (Robertshaw Thermostat Co.). Jan. 28, 1947, No. 2701. [Classes 75(i) and 75(iii)] A safety control system for a fuel burner of the kind described in Specification 589,873, in which the variation in resistance of a flame sensitive resistor causes variation in the current to a solenoid valve and thus controls the supply of fuel to a burner responsive to the presence or absence of a burner flame, is modified in that the solenoid valve 18 is operated by a control relay 22 instead of being operated directly by a variation of the current therethrough. Current from the secondary of a transformer 30 energized by manual or thermostatic opening of a main fuel valve 14 is supplied to a bridge circuit comprising an arm CD including a resistor 50 located for heating by a pilot burner 24, an arm CB containing the operating coil 42 of a relay 22 adapted to be short-circuited by a switch 56, an arm AB containing a resistor 29, an ignition coil 27, and a switch 58, an arm AD containing a resistor 52, and a detector arm containing a cutout 54. On initial closing of the main switch of valve 14 the relay coil 42 is short circuited by the switch 56 for a short period, of say 5 seconds, during which the ignition coil 27 ignites the pilot burner 24. At the end of said period the switch 56 is opened by the relay coil 60, and the relay coil 42 retracts its core 40 from a spring pressed arm 44 to permit closing of contacts 46, 48 to energize the solenoid valve circuit through a resistor 64 provided with a pilot lamp 62. At the end of a longer period, say 18 seconds, the relay coil 60 opens the switch 58 to de-energise the igniter 27 so that the bridge circuit ceases to exist, and the thermal resistor 50 is connected in parallel with the cutout 54 and the relay coil 42. An alternative system is described in which the fuel supply to the pilot burner 24 is also controlled by the solenoid valve 18 and the latter is energised by the primary of the transformer 30. Specification 594,606 also is referred to.
Patent GB-1033036-A (GB)
Title: Improvements in and relating to devices for removing or neutralising static electricity charges
IPC: H05F3/04
Filed: 1965-01-21
Abstract: 1,033,036. Discharging static electricity. MARCO Inc. Jan. 21, 1965 [April 3, 1964], No. 2766/65. Heading H1X. The discharge points 41 of a static electricity discharger are integral parts of members 27 which hold the points in spaced positions along a bar 20, the points being surrounded except at their tips by a dielectric material 40. The channel-shaped casing 15 is provided with supporting lugs 18 and 19 for connection to ground, and the bar 20 is connected via conductor 21 to a transformer. The bar 20 may be of brass and is supported in the casing 15 by plastic blocks 23. The material 40 is preferably an epoxy resin.
Patent GB-677835-A (GB)
Title: Improvements relating to rotary compressors
Inventor: WHITTLE SIR FRANK
IPC: F04D17/12
Filed: 1949-03-01
Abstract: 677,835. Centrifugal and axial-flow compressors; gas turbine plant. POWER JETS, (RESEARCH & DEVELOPMENT), Ltd. March 13, 1950 [March 1, 1949; March 14, 1949], Nos. 2792/49, and 6986/49. Classes 110(i) and 110(iii) Pre-whirl is imparted to the gas in the annular intake passage of a centrifugal compressor by means of a bladed rotor which is driven at a substantially lower rotational speed than the centrifugal impeller, and is arranged with its blading sweeping a duct area substantially greater than that at the impeller entry. An air compressor forming part of a jet propulsion plant comprises a centrifugal impeller 1, Fig. 1, driven by a gas turbine (not shown) and connected by gearing 5 to a pre-whirl rotor 3 so that the latter is rotated in the same direction but at say, 1/3 of the rotational speed of the impeller 1. Desirably, the mean diameter of the pre-whirl blading 4 is, as shown, greater than that of the impeller eye, and is at least as great as the external diameter of'the impeller eye. The blading is twisted to impart, either alone or in conjunction with the boundary layer and viscosity effects of the intake passage 9, free vortex flow. The impeller vanes are twisted at 1a to give shockless entry. The inner wall 10 of the passage 9 is either mounted for free rotation or, as shown, is attached to the rotor 3. Struts 8 support the gearing 5. In a modification, Fig. 2, the air passes radially inwards through the blading 4, which is not twisted, the free vortex flow being imposed entirely by the curvature of the passage 9. The pre-whirl rotor may be driven by a separate turbine, which may be a low pressure turbine in series with the main turbine. The centrifugal impeller may be double-sided, and there may be more than one centrifugal stage. The prewhirl may be imparted by the last set of rotating blades of an axial-flow compressor. According to the first Provisional Specification, the compressor may be of the axialflow type, and the pre-whirl may be imparted by a combination of rotor and stator means. The pre-whirl rotor may rotate at 55 to 75 per cent of the impeller speed. According to the second Provisional Specification an annular slot may be provided in the outer wall of the intake passage to remove the boundary layer of air, together with suspended foreign particles. Specifications 579,780, and 587,509 are referred to.
Patent GB-999249-A (GB)
Title: Low voltage alkaline dry cell
IPC: H01M6/06
Filed: 1962-01-25
Abstract: 999,249. Batteries. MALLORY BATTERIES Ltd. Jan. 25, 1962 [Feb. 1, 1961], No. 2798/62. Heading H1B. An alkaline dry cell has a zinc anode and a cadmium oxide cathode. The anode may be in the form of (1) a tube made by rolling zinc foil and a sheet of electrolyte absorbent paper together, (2) a tube of perforated or corrugated zinc foil impregnated or coated with gel electrolyte, (3) a zinc disc impregnated with gel electrolyte, (4) amalgamated zinc powder dispersed in a gel electrolyte, (5) a hollow or solid cylinder or a flat circular or rectangular pellet made by compressing powdered amalgamated zinc, (6) zinc spray deposited on an electrolyte absorbent or conductive matrix and amalgamated. The cathode is made of cadmium oxide powder mixed with a good conductor, e.g. iron, nickel, cadmium, micronized graphite, or carbon black. The electrolyte may be an aqueous solution of potassium hydroxide, sodium hydroxide or lithium hydroxide, saturated, or substantially saturated with zinc oxide in the form of zincate. A sealed cell identical in construction with that shown in Specification 753,090 is the preferred embodiment.
Patent GB-880144-A (GB)
Title: Improvements in or relating to rotary cutting machines
Inventor: CUSHING HERBERT HENRY
IPC: B29D30/46
Filed: 1957-01-26
Abstract: 880,144. Cutting-machines. DUNLOP RUBBER CO. Ltd. Jan. 17, 1958 [Jan. 26, 1957], No. 2898/57. Class 31 (1). A rotary cutting machine comprises a pair of rotatable circular cutter blades disposed so that a portion of a face of one blade overlaps and drivably engages a face of the other blade, means to incline and to change the angle of inclination of the axis of one cutter blade with respect to the axis of the other cutter blade, and means for rotating one of the blades to impart drive to the other blade. As shown in Fig. 1, the cutting machine comprises a plurality of cutter assemblies 10 mounted on a fixed shaft 5 and a plurality of cutter assemblies 11 drivably mounted on a parallel rotatable shaft 6, each cutter assembly 11 having a spring-loaded cutter blade 22, Fig. 9, slidable axially into contact with a cutter blade 34, Fig. 8, of a cutter assembly 10, the blade 34 being carried on a bearing mounting 31 upon which it can be adjustably inclined with respect to the blade 22 by means of a rotatable adjusting plate 26 having on one side face thereof cam surfaces which bear against the heads of pins 24c, 24d pressed into the collar portion 24a of a cutter body 24. An annular thrust race 32 fits over the outer circumference of the bearing mounting 31 which has a shoulder portion 31a fitting within the bore of a ball-race 33 rotatably carrying the blade 34. To obtain increased pressure at the cutting point, each cutter assembly 10 is provided with a pressure attachment 36, Fig. 2, which comprises a link 39 pivotally mounted on a member 37 clamped to the shaft 5, one end of the link having an adjusting screw 41 for contacting the plate 26 and the other end of the link being engageable by an operating lever 38 pivoted to the member 37. To locate the cutter assemblies axially on the shafts 5, 6 each cutter assembly is provided with a pair of manually - operable spring - loaded pivotallymounted levers 15 having teeth 15a for selectively engaging one of a plurality of pairs of equally-spaced diametrically-opposed slots 12 provided on the shafts 5, 6. The material to be cut is fed through an adjustable guide assembly 49, Fig. 1, comprising slotted guides 45a, 45b mounted on blocks 46a, 46b having threaded bores engaging left- and right-hand screwthreads 42a, 42b of a rotatable spindle 42. Means, Figs. 6 and 7 (not shown), are provided for adjusting the shaft 5 axially and laterally. Reference has been directed by the Comptroller to Specification 711,055.
Patent GB-729845-A (GB)
Title: Improved preparation of double alkali metal-titanium fluorides
IPC: C01G23/00
Filed: 1953-02-02
Abstract: A double fluoride of an alkali metal (as herein defined) and titanium is produced from a ferric iron-containing titanium ore by reducing the ferric iron content to the ferrous state, forming a reaction mixture of the thus reduced ore with an alkali metal fluoride, or with an alkali metal fluosilicate together with 2-4 molar per cent. of alkali metal fluoride, reacting the mixture in an aqueous medium in the presence of sulphuric acid, and recovering the resultant double fluoride.  The term "alkali metal" refers to these metals and ammonium except where otherwise noted.  The reduction of the iron in the ore (suitably concen trated beach sand is preferred) may be performed at 1,000-1,200 DEG  C., using, e.g. hydrogen or ammonia but preferably carbon monoxide or carbon, the latter, e.g. as petroleum coke being usually used in quantities not exceeding 10 parts by weight per 100 parts of ilmenite.  Reoxidation is avoided by quenching in water or discharging into a container from which air is excluded.  It is desirable to add to the reaction mixture a small quantity, e.g. 2-3 molar per cent. in relation to the H2SO4, of chloride ion, as catalyst an this may be supplied as alkali metal or hydrogen chloride.  When an alkali metal fluoride is employed, the reagents are used in proportions slightly (e.g. 2-4 molar per cent.) in excess of that required for equations such as FeO.TiO2+6NaF+2H2O--> Na2TiF6+2Na2SO4+Fe(OH)2+H2O in which a part of the sodium fluoride may be replaced by that of another alkali metal, or if desired by an alkaline earth metal. The above-mentioned excess may alternatively be supplied by hydrogen fluoride.  In general, when using fluorides the reduced ilmenite is finely powdered and slurried with water: the finely powdered fluorides are added, with the chloride catalyst.  50 per cent. sulphuric acid is then added dropwise with stirring, the temperature being kept below 100 DEG  C. The mixture is diluted with water, digested filtered and the filtrate crystallized in a manner depending upon the solubility of the components present; ferrous hydroxide may be recovered from the residue.  When using alkali metal silicofluorides, as indicated by the reaction FeO.TiO2+ K2SiF6+H2SO4-->K2TiF6+ FeSO4+SiO2H2O, only one-third of the normal amount of sulphuric acid need be used.  This reaction may be carried out by similar processes to that described above, or the solid reactants (which in this method need not include chlorides and should not include ammonium salts) are mixed and calcined at 600-800 DEG  C. in a reducing atmosphere for a short period of time and then comminuted and reacted with sulphuric acid as before. Examples are given.
Patent GB-294080-A (GB)
Title: Improvements in gearing
IPC: F16H1/24
Filed: 1928-01-30
Abstract: 294,080. Raimondi, F. Jan. 30, 1028. Toothed gearing; connecting and disconnecting arrangements. - Balls or rollers C are carried in a normally unbroken series in a guide tube S, S' and interengage successively with spherical or cylindrical recesses in the peripheries of gearwheels R, R<1> to convey power therebetween. To interrupt the drive, the series is broken by the use of a hinged section D of the tube, which, when swung outwards, permits an accumulation of balls &c. against its surface.