baber/WOPTO huggingface dataset:
Patent GB-1494564-A (GB)
Title: Separation of iron from zinc-containing solutions
IPC: C01G49/14
Filed: 1975-02-25
Abstract: 1494564 Removing iron from zinc sulphate solutions INCO Ltd 25 Feb 1975 [22 Aug 1974] 7820/75 Heading C1A Iron is removed from a zinc sulphate solution or slurry by a process in which ferrous iron present is oxidized to ferric iron and thereafter separated by precipitation, characterized in that oxidation of the iron is effected by contacting the solution with a gaseous mixture containing oxygen and sulphur dioxide in a volume ratio between 400:1 and 1:1, preferably from 39:1 to 9:1, while maintaining the solution pH between 0À5 and 4À0, preferably at 1À8-3À0, and the temperature at at least 50‹ C. The ferric iron may be precipitated as a basic sulphate by adjusting the pH to below 1À5 in the presence of added K<SP>+</SP>, Na<SP>+</SP> or NH 4 <SP>+</SP> ions, or partly as hydroxide by raising the solution pH to a value of at least 3À5, the sulphate ion concentration being maintained in the solution by adjusting the relative amounts of hydroxide and basic sulphate precipitated. The purified zinc sulphate solution contains only traces of iron and is suitable for electrolytic zinc production.
Patent GB-289609-A (GB)
Title: Improvements in and relating to changeable signs
IPC: G09F7/08
Filed: 1927-03-22
Abstract: 289,609. Shurly, E. W., and Changeable Sign Co., Ltd. March 22, 1927. Loose-letter and like signs.-In signs comprising a back portion a on which are secured separate transverse bars &c. b forming guides for receiving opposed hooks &c. e on the rear faces of letters &c. d, the bars b are connected to the back a by suitably-disposed distance-pieces h so as to provide a space through which rain may escape. The letters d may be coated with a luminous or reflecting composition or may be fitted with electric lamps, reflectors, &c.
Patent GB-451489-A (GB)
Title: Barrel fastening means for machine guns
IPC: F41A9/33
Filed: 1935-08-21
Abstract: 451,489. Machine guns. FABRIQUE NATIONALE D'ARMES DE GUERRE SOC. ANON., Herstal, Liege, Belgium. Aug. 21, 1935, Nos. 7970/36 (divided application), and 7971/36 (divided application). Convention dates, Aug. 21, 1934 and Sept. 28, 1934. [Class 92 (ii)] To permit of readily dismounting the barrel 18 from the breech casing 26 a ring 35 is rotatable on the rear end of the barrel by a handle 40 and has external interrupted threads 36 for engagement with corresponding internal threads on the breech casing. The handle, shown in the unlocking position, has a spring catch 41 which rides over a series of notches on the front of the breech casing to fix the ring in the locking position. Further, the interrupted threads are of slightly greater pitch than the threads 34 by which the ring is connected to the barrel so that, in locking, the barrel face is forced against the breech face. At the end of unlocking, the handle arm 45 engages a ramp on the breech face to force the barrel forwards. The barrel is guided on the casing of the gas cylinder by lateral vertical faces 48 and by horizontal surfaces 49, 51. The handle serves for carrying the barrel or the entire gun.
Patent GB-1512281-A (GB)
Title: Containers
IPC: B65D8/04
Filed: 1976-05-12
Abstract: 1512281 Seals G K N SANKEY Ltd 12 May 1976 [26 Feb 1975] 7979/75 Heading F2B [Also in Division B8] A beer keg comprises two plastics shells 10 and 11 sealed by a T-shaped resilient ring 26 compressed between their adjacent edges, the leg 29 of the sealing ring being flush with the inner surfaces 30, 31 of the shells and the cross-piece 28 of the sealing ring preventing the ring being drawn into the container on an under-pressure occurring within the container. The two shells are secured together by a plastics sleeve 37 welded, e.g. spotwelded, to the shells at 38, the opposite ends of the sleeve abutting integral rolling ribs 17 to limit the compression of the leg of the sealing ring between the shells' edges. The sleeve also prevents deformation of the sealing ring cross-piece 28 which is housed in a recess defined by rebates 32 and 33 in the shell edges, the recess being axially wider than the cross-piece to allow for greater thermal expansion of the sealing ring. In a modification, Fig. 3 (not shown), the sleeve (46) is integral with one of the shells. In another embodiment, Fig. 4 (not shown), the shells are secured together by a channel-shaped metal ring (55) induction welded to the shells, a plastics ring (55a) made of semi-circular parts being disposed between the sealing ring and ring (55) to protect the sealing ring during welding and to limit the compression of the sealing ring leg (52) between the shells' edges.
Patent GB-735027-A (GB)
Title: Improvements in artificial yarns and fibres
Inventor: JONES ROBERT EDWARD
IPC: D02G1/14
Filed: 1952-03-28
Abstract: Polyethylene terephthalate filaments in tow or bundle form are drawn and crimped in one operation by passage from feed rolls through a heating zone, as may be provided by a hot surface, a bath of hot inert liquid or vapour, radiant heat, or radio-frequency heating, to draw rolls which have intermeshing but not necessarily contacting teeth and rotate at least three times the surface speed of the feed rolls: the draw rolls may be heated by means of internal electrical heaters or electric radiant heaters or hot fluids to maintain the rolls at a temperature at least as high as the temperature of the heating zone.  The crimped filaments may be subjected to a heat setting or hot relaxing treatment at a temperature exceeding the drawing and crimping temperature.
Patent GB-1530341-A (GB)
Title: Method for protecting against dropouts in an information signal
IPC: G11B20/18
Filed: 1976-03-01
Abstract: 1530341 Drop-out detection THOMSONBRANDT 1 March 1976 [4 March 1975] 08159/76 Headings H4J and H4F A method of compensating for drop outs in signal, preferably an audio signal, e.g. one reorded on a video disc, comprises modulating first and second carriers with said signal, delaying the second carrier by a time #, adding the first carrier to the second delayed carrier and recording the sum, monitoring the replayed signal to detect drop outs, delaying said first carrier by a time #, demodulating said carriers and making available said first mentioned signal on whichever channel does not presently contain a drop out. When a drop out detector (112) detects that the signal has dropped below a given threshold it switches relay 117 to make the delayed signal on line 118 available at the output S1. At all other times the delayed signal on 119 is available. In an alternative embodiment (Fig. 2, not shown) of the replay circuit an improved signal to noise ratio is obtained by adding the delayed and undelayed replayed signals and attenuating the sum to provide an audio signal at the correct amplitude. When a drop out is detected, the undelayed signal is earthed and the attenuation is ceased so the signal level S2 remains substantially constant. Furthermore, monostables (309, 310) trigger a switch in the delayed signal line at a time corresponding to the length of the delay after detection of a drop out. In this way the delayed signal line is earthed when the drop out passes. In both embodiments the line containing the drop out is switched out for a preset time which is larger than the anticipated length of drop outs. If a video disc is used then the delay # should not be close to a multiple of the revolution period. When the invention is used with a recorded television signal, a common drop out detector may be employed for the audio and video drop out compensation circuits, since the drop out occurs in the main carrier.
Patent GB-100740-A (GB)
Title: Improvements in Fabric Cutting Machines.
Inventor: MAIMIN HYMAN
IPC: D06H7/02
Filed: 1916-06-09
Abstract: 100,740. Maimin, H. June 18, 1915, [Convention date]. Cutting-appliances.- Relates to handdirected power-driven fabric-cutting machines of the kind that employ a vertically-reciprocating knife sliding in a standard and actuated by an electric motor. The knife is in the form of a long flat blade having a cutting- edge along its front, and another at its lower edge. The object of the invention is to provide for the sharpening of the lower edge without removing the knife from the machine. Normally, the back edge 8 of the knife 7 bears upon the bottom 6 of the guide-slot in the standard 2. For sharpening, the knife is moved laterally, into the position shown, with its lower edge clear of the standard. The top of the standard is formed as a guideway for the lower part 4 of the head of the machine, comprising the motor and the driving-gear, and an arm 21 is pivoted to it; the boss of this arm is formed with cam-faces which bear upon corresponding camfaces on the member 14 which supports the pivot pin 20 and is secured to the head; the arm is prevented from moving axially by the engagement of a collar 22 thereon with a recess in the top of the standard, so that when it is turned, the head of the machine is moved laterally, carrying with it the knife. The grinding-blccks 51, 52 are secured in sleeves free to rock under the control of springs and stops on arms 47, 48 projecting from sleeves which are themselves free to rock on arms 41, 42 of a frame 34. This frame is pivoted at 33 to extensions 31, 32 of an arm 26 which is pivoted at 27 to the arm 21; a spindle 36 mounted in the frame is driven by a crank-handle 38 and carries a cam 39 which engages in the fork end of the extension 32, whereby the frame is caused to rock on its pivot from C to D, Fig. 3, with a dwell at each end of the stroke. Another cam 65 on the spindle engages the fork of one arm of a threearmed lever 61 pivoted to the frame 34 at 62, the other forked arms of which engage with the arms 47, 48 of the grinding-blocks; the cam 65 is so disposed in relation to the cam 39 that each block is moved upwardly in contact with the corresponding cutting-edge while the frame is at rest. Arms 67 ensure the correct positioning of the sharpening-device in relation to the standard. When the sharpening is completed, the sharpener is swung away from the standard about the pivot 27; the arm 21, with the entire apparatus, is then swung upwards about the pivot 20 into the position shown in dotted lines, in which it is retained by the catches 68, 69. This movement restores the knife to its working position in the standard.
Patent GB-632814-A (GB)
Title: Improvements in and relating to coolers for granular or lumpy solid material and rotary kilns
IPC: F27D99/00
Filed: 1947-03-26
Abstract: 632,814. Cooling cement clinker &c. ALLEN & CO., Ltd., E., and ANDREWS, H. March 26, 1947, No. 8251. [Class 51 (ii)] Apparatus for cooling material discharged from a rotary kiln 1 into a chamber 8 comprises an inclined lower grate 10 enclosed in a chamber 12 to which cooling air or gas is admitted through a duct 13, and an upper grate or grid 11 arranged substantially parallel to the lower grate to ensure that material falling by gravity between the grates forms a layer of substantially uniform thickness. The lower grate may be a perforated sheet or a grid formed of spaced bars or louvres. The upper grate or grid may be' formed of widely spaced and thick bars, preferably circular in cross-section, the width or thickness of which is so related to the angle of repose of the material that no substantial quantity of material will pass between them. The cooled material is discharged into a hopper 22 by a rotary member 21, furnished with blades or vanes, which co-operates with a circular wall of the chamber to form an air lock. The rate of discharge of material may be regulated by an adjustable gate 20 which also assists in preventing egress of cooling air. The air is supplied to the duct 13 by a fan 14 and the rate of flow may be controlled by a slide valve 15. The chamber 12 is divided by a partition 18 so that the air heated by passage through the upper parts of the grates is caused to enter a flue 19 leading to the lower end of the kiln. The duct is fitted with a by-pass 16 through which a regulated quantity of air may be directed through the lower parts of the grates and out of the chamber by way of the flue 17.
Patent GB-559239-A (GB)
Title: Improvements in or relating to chrome tanned leather
IPC: C14C3/06
Filed: 1942-06-17
Abstract: 559,239. Finishing leather. NATIONAL OIL PRODUCTS CO. June 17,1942, No. 8266. Convention date, July 23, 1941. [Class 76] A finishing process for chrome tanned leather comprises treating the leather with an alkaline oxidizing agent in sufficient concentration and for sufficient time to oxidize the chrome on and just below the surface of the leather and removing the soluble oxidized salt, e.g. by washing with water. The oxidizing solution may be alkaline hydrogen peroxide. After treatment the leather may be neutralized by means of a salt solution, e.g. sodium chloride and an acid. To produce a white leather, a non- colouring chrome-free tanning agent is applied to the partly detanned material, e.g. a zirconium agent, a white synthetictanning agent, formaldehyde and alum. A suitable fat liquoring agent for this leather consists of a hydrocarbon solvent and sulphonated sperm oil.
Patent GB-704570-A (GB)
Title: Improvements in or relating to magnetometers
IPC: G01R33/038
Filed: 1952-04-02
Abstract: 704,570. Magnetic tests and measurements. ASKANIA-WERKE AKT.-GES. April 2, 1952 [April 7, 1951; April 19, 1951], No. 8418/52. Class 37 A magnetometer for measuring the intensity of a vertical field comprises a magnet system 5 suspended by substantially horizontal torsion wires, 3, 4, from torsion heads 1, 2 to which are directly attached calibrated glass discs 7, 8. The magnet system comprises a plane mirror 6 suspended between two disc magnets, and when subjected to a vertical magnetic field the torsion heads 1, 2 are rotated through gearing, either together or individually to give a coarse and fine adjustment, by a control knob 18 until the mirror 6 returns to its original position, as determined by a telescope 32, when the amount of rotation of each torsion head is simultaneously determined by a microscope which includes lenses 9, 10 and mirrors 12 and accurately determines the positions of discs 7, 8. Horizontal coils 31 are provided for calibrating the magnetometer. In a modification for measuring horizontal and vertical field strength the mirror 6 reflects from both surfaces and is inclined at 45 degrees to the magnetic axis. Two fixed mirrors are provided, and mirror 6 co-operates with one or the other, depending on whether the magnetic axis is normally horizontal or vertical, to give an indication through the telescope 32. Vertical and horizontal calibrating coils are provided. The magnetic system is associated with a sliding clamp for transport, whereby a forked part 29 lifts the magnets against a stop 30.
Patent GB-681298-A (GB)
Title: Improvements in or relating to gear cases for motor driven appliances
IPC: F16H57/04
Filed: 1950-04-05
Abstract: 681,298. Toothed gearing. TARPEN ENGINEERING CO., Ltd., and ROSS, J. W. April 5, 1951 [April 5, 1950], No. 8545/50. Class 80 (i). The upper portion of a gear casing 5 is provided with a pocket 9 for collecting oil thrown by centrifugal force from the gear 14 and for feeding through drip holes 13 onto the gear 3. A filler hole 11 closed by a plug 12 is provided for the pocket 9 and an oil level hole with a plug 16 for the bottom of the casing 5.
Patent GB-105157-A (GB)
Title: Improvements in Internal Combustion Engines adapted to Run on Heavy Hydrocarbons.
Inventor: SWEETSER GEORGE
IPC: F02B1/00
Filed: 1916-06-17
Abstract: 105,157. Sweetser, G. June 17, 1916. Cylinders receiving liquid fuel.-Engines which work as described in Specification 23574/13, by injecting a heavy oil on to an igniter at starting and afterwards injecting the oil during the suction stroke, are constructed with a combustion chamber 3 separated from the cylinder by a passage 6 and containing the igniter 5 and injector 4.
Patent GB-578374-A (GB)
Title: Improvements in or relating to regeneration methods for the production of sulphuric acid
IPC: C01B17/58
Filed: 1943-06-01
Abstract: 578,374. Sulphuric acid ; sulphur dioxide. CHEMICAL CONSTRUCTION CORPORATION. June 1, 1943, No. 8762. Convention date, June 12, 1942. Drawings to Specification. [Class 1 (if)] [Also in Groups XI and XII] Waste or bye-product sulphuric acid is regenerated by commingling the sulphuric acid of at least 80 per cent. concentration in the form of a vapour or finely divided spray with the flame of a burning mixture of a hydrocarbon and air preheated to at least 800‹F., maintaining the acid in the combustion zone under oxidizing conditions at temperatures of at least 1600‹F. until it is substantially completely decomposed into a mixture of sulphur dioxide, oxygen and water vapour, cooling the resulting gas mixture and removing water therefrom, catalytically oxidizing the sulphur dioxide therein to sulphur trioxide with a conventional contact catalyst, and absorbing the sulphur trioxide in strong sulphuric acid. The hydrocarbon may be burned as a cone of flame, a stream of finely divided sulphuric acid being injected into the cone. Alternatively, the sulphuric acid may be vaporised to the stream of hot air which has been preheated by heat exchange with the hot gases of the combustion zone or may be introduced in admixture with the hydrocarbon fuel; or combustion step may be effected in apparatus in which the sulphuric acid is spraved into the furnace through a nozzle mounted just below the centre of a ring type burner introducing the hydrocarbon gas, air preheated by heat exchange with the products of combustion being introduced around the ring burner (see Group XII). According to another modification jets of sulphuric acid and hydrocarbon oil are injected from opposite sides of the furnace, preheated air being introduced through a 'multiplicity of ducts in the wall of the furnace. A burner may be employed comprising three concentric pipes for the introduction of sulphuric acid, fuel oil and steam respectively (see Group XI).
Patent GB-288143-A (GB)
Title: Process for the working up of ethyl cellulose
IPC: C08B11/20
Filed: 1928-03-22
Abstract: 288,143. I. G. Farbenindustrie Akt.- Ges. March 31, 1927, [Convention date]. Plastic compositions containing cellulose esters. -Celulose ethyl ethers containing at least two ethoxy groups are worked up by treatment under heat with a solvent or solvent mixture which only dissolves the ether when hot. The actual working-up mav be preceded by a purification step, the solution of the ether being cooled to cause the separation of the latter in flakes or grains; these after separation and while still wet with the solvent, may be worked up in the manner above referred to Appropriate solvents are benzene, ligroin, and hydroaromatic. hydrocarbons such as bydrotoluene. The Specification as open to inspection under Sect. 91 (3) (a) refers to the application of the process to cellulose esters in general, and suggests as a suitable solvent for use with benzylcellulose a mixture of hydro-naphthalenes. This subject-matter does not appear in the Specification as accepted.
Patent GB-457250-A (GB)
Title: Ornamental seam sewing machine
IPC: D05B57/08
Filed: 1936-03-25
Abstract: 457,250. Sewing machines. FAIRWEATHER, W. C., 65, Chancery Lane, London.-(Singer Manufacturing Co.; Elizabeth, New Jersey, U.S.A.) March 25, 1936, No. 8832. [Class 112] A sewing-machine for hem - stitching has a main pierce] descending only or alternate strokes of the needle or needles so that zigzag stitch es are laid alter nately in and spacec from the holes. The invention is describ ed as applied to a laterally - vibrating two-needle machine as described in Speci fication 404,205 The needles 14, 16 are vibrated in the work to a small extent, and out of the work to a larger extent by bell-cranks 12, 13, rods 15, 17 links 20, 21, rods 30, 31 and a vibratory arm attached to the rear of the rods 30, 31 operated by a follower tracking a groove 34 in the cam 35. The needles co-operate with loopers 39, 40 for forming chain stitches. Feed. The work is fed forward by a feed dog 43 carried by a feed bar 46, when the needles are out of the work. The feed bar is advanced by the rock-shaft 48 actuated by link 52 from the feed-advance cam 57. It is given its feed-lift movement by a rockshaft 50 actuated by a link 59 from a cam groove in the spur gear 36. Piercers. The main piercer 63 is carried by a bracket 64 at the end of a bar 65 operated by a crank arm 57 at the end of a shaft 68 which has another crank arm 71 at its other end provided with a follower 72 working in a cam groove in the spur gear 74 driven by a pinion 78 in the main shaft 5. The pinion 74 rotates at one half the speed of the main shaft 5 so that the piercer only makes one descent for every two successive needle reciprocations. This descent is made when the needles are in the narrowly spaced relation, the piercer being grooved at each side to allow this. The piercer enters the work before the needles, which follow and make the stitches in the holes a. The piercer begins to rise as the needles complete their descent and make the stitches in the holes. The next time the needles descend to make the stitches c, spaced from the holes, the needles being at their wider spaced relation, the piercer 63 remains inoperative. An auxiliary piercer 79 is mounted on the needle bar in front of the main piercer at a distance equal to or a multiple of, the amplitude of the feed advance. This piercer prepares the hole to be subsequently entered and enlarged by the main piercer. Stitches. The effect produced is shown in Fig. 11. The holes a made by the piercer are held open by stitches laid alternately in the holes and in the fabric, the effect being different from the usual hemstitch in that there is no stitching to hold the cross bars b of thread together.
Patent GB-314123-A (GB)
Title: Improvements in electric accumulators
IPC: H01M4/32
Filed: 1928-03-24
Abstract: 314,123. Leitner, H. March 24, 1928. Electrodes.-A positive plate for an accumulator consists of a nickel plate carrying a layer of oxide of nickel which is formed from the metal of the plate itself by making the plate the anode in a 1 to 2 per cent solution of caustic potash or soda containing also a salt such as potassium or sodium chloride, chlorate or nitrate. The oxidized plate is completed by repeated chargings and discharging in a caustic potash electrolyte of normal strength.
Patent GB-1443182-A (GB)
Title: Method and apparatus for separating proteins and antibodies
IPC: G01N33/553
Filed: 1973-06-26
Abstract: 1443182 Apparatus for protein purification GENERAL ELECTRICAL CO 26 June 1973 [26 June 1972] 8922/76 Divided out of 1443181 Heading C3H A protein is separated from a solution containing it by a method comprising immersing a first portion of a continuous belt substrate in the solution 53 containing the protein to be separated, the substrate having on its surface a monomolecular layer of a protein specifically reactive with the protein to be separated whereby a second protein layer forms on the first portion of the substrate, conveying the belt to immerse the first portion of the belt in a solution 59 of weak acid to sever the bonds between the first and second protein layers while conveying a second portion of the substrate to immerse it in the solution 53, and returning the first portion of the belt from the weak acid solution 59 to the protein-containing solution 53. A solution of the protein to be separated in the weak acid 59 is obtained. Both solutions 53 and 59 may be agitated.