baber/WOPTO huggingface dataset:
Patent GB-747312-A (GB)
Title: Refining of copper-base alloys
IPC: C22B15/14
Filed: 1954-05-11
Abstract: The Pb content of a Cu-base alloy is reduced by treating the alloy, preferably finely divided e.g. in the form of chippings, turnings or grindings, with a solution of nitric acid containing no other substance which will react with the alloy.  The alloy is degreased and treated with a solution containing, for example, 2-13 per cent by volume of nitric acid of density 1,42 in water. Treatment may take place at atmospheric temperature and in a revolving container.  Two successive treatments may be used, the first in a relatively weak solution, for example the solution which has been used with a previous charge, and the second in a stronger solution.  Lead may be recovered from the solution by precipitation as hydroxide or carbonate.  Examples are given of the treatment of an alloy containing Cu 84,3 per cent, Sn 6,7 per cent, Pb 4,6 per cent and Zn 4,3 per cent, the final alloy containing Cu 87,7 per cent, Sn 6,9 per cent, Pb 1,0 per cent and Zn 4,2 per cent, and of the treatment of an alloy containing Cu 75,8 per cent, Sn 7,5 per cent, Pb 14,7 per cent and Zn 1,8 per cent, the final alloy containing Cu 87,0 per cent, Sn 8,6 per cent, Pb 2,3 per cent and Zn 2,1 per cent.
Patent GB-479724-A (GB)
Title: Improvements in filling and venting devices for electric accumulators
IPC: H01M2/12
Filed: 1937-05-18
Abstract: 479,724. Batteries. CHLORIDE ELECTRICAL STORAGE CO., Ltd. (Lighton, L. E.) May 18, 1937, No. 13802. [Class 53] [Also in Group XVIII] A device for indicating when a battery is filled with electrolyte to the correct level comprises a filling tube 3 extending downwards to the required level and provided with apertures 24 which connect the space in the battery above the electrolyte with the bore of the tube. Means are provided for closing the apertures 24 when the plug 6 is removed so that when the electrolyte reaches the tube 3 it seals the space outside the tube and rises quickly in the tube thus indicating that the battery contains the correct amount of electrolyte. When the plug 6 is inserted the apertures 24 are opened to put the space above the electrolyte in communication with the atmosphere through the tube 3 and plug 6 thus allowing gas to escape and causing the electrolyte in tube 3 to fall to the level of the electrolyte in the battery. Various ways are described for opening and closing the apertures 24. In the form shown in Fig. 1, the apertures are conical and are closed by conical members 9 which are pressed inwards by a rubber band 10. The members 9 are moved outwards to open the apertures by the lower tapered end 11 of the plug 6. In a modification, the plug 6 is secured in position by a bayonet joint and the lower end of the plug is provided with cam surfaces which press the members 9 outwards when the plug is rotated. Fig. 3 shows a further modification in which the apertures 24 are closed by a rigid tubular member 35 which rests on a rubber ring 36. When the plug 6 is inserted its lower end presses the member 35 downwards allowing gas to escape through the apertures 24 and vent holes 26, 13. In another form the tube 3 is screw-threaded internally throughout its whole length, the member 35 being screw-threaded on its outer surface. Projections on the plug 6 engage projections on the member 35 to enable the latter to be turned. Fig. 2 shows another modification in which the passage through the apertures 24 to the atmosphere is closed by a soft rubber member 21 having a conical portion 22 which closes the opening in a flange 23 projecting from the filling tube. When the plug 6 is screwed down it presses the conical portion 22 away from the flange thus providing a clear passage from the apertures 24 to the vent 13.
Patent GB-860040-A (GB)
Title: Means for detecting the occurrence of a spark in an electrical spark ignition system
Inventor: BARNES LESLIE
IPC: F02C7/26
Filed: 1958-04-30
Abstract: 860,040. Detecting spark ignition of burners. ROLLS-ROYCE Ltd. March 16, 1959 [April 30, 1958], No. 13824/58. Class 75 (3). A power plant, for instance a rocket motor, comprises a combustion chamber 10 provided with sparking plugs 14, 15, a detector 16 or 17 for detecting a temperature rise or a shock wave set up by the sparks of the sparking plugs and means for preventing further steps being taken in the bringing of the power plant into operation until the detector indicates the occurrence of a satisfactory spark. The detector 16 is either a thermocouple or a thermopile or an acoustic device such as a carbon or coil type microphone. The detector 17 is a strain guage disposed on the outside surface of the combustion chamber and adapted to detect shock waves.
Patent GB-119280-A (GB)
Title: Cowling of Engines for Aircraft.
Inventor: CUTHBERTSON HUGH SAINSBURY
IPC: B64D33/10
Filed: 1917-09-27
Abstract: 119,280. Cuthbertson, H. S. Sept. 27, 1917. Casings; cylinders, cooling.-Each cylinder of an aircraft engine is enclosed by a casing of streamline form or section in order to diminish air resistance. The invention is illustrated as applied to a radial-cylinder engine, which may be stationary or rotary. In the latter case, the casings are of slightly twisted form, the axis of any given section being in the direction of the resultant of the speed of rotation and the flight velocity of the machine. The casings may be provided with slots l for the admission of air for cooling the cylinders, the air escaping through a conoidal central casing d, to which the casings b are secured. The casings may be of copper, alaminium, &c., and the cylinders a may have cooling-fins or a water jacket. The casings may be adjustable in accordance with changes in the speed of the machine, the adjustment being effected by means of a control band having rack teeth engaged by a hand-actuated pinion; the control band ettends around the central casing d and is bolted to the base-plate of each casing b, the base-plate being connected to the casing d by a pin-and-slot connexion allowing a limited rotation. When the casing d overlaps the fixed part of the machine, a fixed ring is provided to prevent the outward creep of oil.
Patent GB-1521582-A (GB)
Title: Headphone earpiece
IPC: H04R1/10
Filed: 1976-04-06
Abstract: 1521582 Headphone earpieces AKG AKUSTISCHE U KINO-GERATE GmbH 6 April 1976 [8 April 1975] 13986/76 Heading H4J A headphone earpiece includes an annular ear pad 4 encircling a rigid plate 2 carrying the transducer 1 and providing an acoustic frictional resistance (i.e. independent of frequency). The plate 2 is formed of a sintered plastics material exhibiting intrinsic acoustic resistance or has groups of apertures 2 covered with damping material such as felt, fleece or filter paper, and/or filled with injected acoustic damping plastics. Each earpiece may contain two horizontally spaced transducers for quadraphonic use.
Patent GB-687730-A (GB)
Title: Improvements relating to the recording of televised images
IPC: H04N5/84
Filed: 1950-06-05
Abstract: 687,730. Television receivers. BRITISH THOMSON-HOUSTON CO., Ltd., and CASTELLAIN, A. P. May 31, 1951 [June 5, 1950], No. 13994/50. Class 40 (iii). In a system for recording received interlaced television images on kinema film by photography of images presented on the screen of a cathode-ray tube, the film is moved continuously in a direction perpendicular to the direction of line scanning and successive partial images presented on the screen of the cathode-ray tube are displaced in the direction of the film motion so that successive partial images register with one another in the appropriate manner on the kinema film. In one embodiment, each partial image is presented on the screen of the cathoderay tube as a single line with no frame component of scanning, lines corresponding to successive partial images being displaced by a waveform derived from the frame-synchronizing signals. If desired the screen of the cathode-ray tube may be covered by a mask having two appropriately displaced slots arranged transversely to the direction of film motion. A high-frequency oscillatory waveform is superimposed upon the rectangular waveform producing successive displacements of the linear image to ensure even illumination of the slot. In an alternative embodiment, the frame component of scanning is produced partially by applying a frame-scanning waveform to the cathode-ray tube and partially by the continuous motion of the film. Specification 673,752 is referred to.
Patent GB-208087-A (GB)
Title: Improvements in and connected with internal combustion engine fuel tanks having automatically controlled feeds
IPC: F02M37/02
Filed: 1923-05-28
Abstract: 208,087. Jones, F. J. S. May 28, 1923. Addition to 152,880. Vacuum apparatus.- In apparatus of the type described in the parent Specification, the inner tank 2 is suspended by weighted levers 7 instead of a spring, and has air pipes associated with a sealed chamber which are closed when the liquid reaches a predetermined level to retain the vacuum in the inner tank. The tank 2 is carried by a tube 4 which has a hemispherical, airinlet valve 5 at the top mounted beneath the suction valve 10, a weighted disc valve 23 at the bottom, ports 19, and a chamber 21 with pipes 20, 22, and 25 communicating with the top of the tank 2 and the top and bottom of the tube 4 respectively. The. valve 23 also normally closes the pipe 25. The tank movement is limited by spring buffers 28 and abutments 27. In the up position of the tank, valve 10 is opened and the tube 4 and tank 2 supplied with fuel until the the weight overcomes the levers 7 and the tank falls. The vacuum is then broken, valve 23 opens, and the fuel passes to the carburettor. Should the fuel in tank 1 and pipe 5 rise to cover the end of the pipe 20, the vacuum in tank 2 and the liquid there:n is retained until the fuel-level falls.
Patent GB-560677-A (GB)
Title: Improvements in or relating to multiple contact electric selector switches
IPC: H01H43/06
Filed: 1942-10-06
Abstract: 560,677. Changing signs. SANDOR, N. Oct. 6, 1942, No. 14032. [Class 3 (i)] [Also in Group XXXVII] A multiple contact switch comprises a rotatably mounted cylindrical unit with an insulating wall, a number of wiper elements corresponding to the number of circuits to be controlled, a number of studs located in holes in the wall with their paths of movement under the wiper elements, and means for establishing a circuit between a wiper when in contact with a stud. The number and position of the studs are so selected that at any given position a predetermined variable number of studs engage their respective wiper blades. In the example, Fig. 4, the wall 14 is perforated and studs 27 are driven into contact with a conducting lining 45, e.g. metal gauze, making contact with the boss 16 and frame 20. Each wiper 28 is connected in a circuit with a lamp 13 for example in a compartment behind a translucent picture, parts of which can be illuminated in sequence. In a modification, Fig. 2, each wiper 28 has a depending end 34 and a ridge 35. The passage of a stud 27 under the wiper raises the ridge 35 into contact with a bus-bar 31 common to all the wiper assembly. The switch may be operated by a hand wheel or by means of a ratchet wheel 22 actuated intermittently by a pawl from an electromagnet energized either by hand switch or automatically. Specifications 14375/03, [Class 40], 504,759, [Group XXXVIII], and 546,174 are referred to.
Patent GB-293788-A (GB)
Title: Improvements in and relating to apparatus for amplifying electrical energy
IPC: H03F3/02
Filed: 1928-05-14
Abstract: 293,788. British Thomson-Houston Co., Ltd., (Assignees of Bierwirth, R. A.). July 12, 1927, [Convention date]. Thermionic amplifiers. - In an inter-valve coupling comprising a transformer or autotransformer 7 connected through a capacity 8 to the anode circuit of the first valve, which has an inductance 6 in its battery feed branch, uniform amplification of the entire audio-frequency range is secured if the inductances 6 and 7 and the capacity 8 have values dependent (according to formulµ given in the Specification) on the anode circuit resistance of the first valve and the primary circuit resistance of the transformer. The circuit is designed to be resonant at the lower audio-frequency limit, say 30, and amplification is constant up to frequencies where capacity and leakage begin to have effect, say 7000.
Patent GB-438413-A (GB)
Title: A process for increasing the viscosity of tars
IPC: C10C3/02
Filed: 1935-05-14
Abstract: 438,413. Tar. AGTHE, C. A., 12, Mommsenstrasse, Zurich, Switzerland.- (Assignee of Geigy Akt.-Ges., J. R.; 215, Schwarzwaldallee, Basle, Switzerland) May 14, 1935, No. 14136. Convention date, May 16, 1934. [Class 55 (ii)] The viscosity of tars is increased by heating during or after distillation with less than 5 per cent of an organic sulphochloride. In one example 1 per cent of cymol-sulphochloride is dissolved in a crude coal tar which is then distilled : in another it is dissolved in a distilled tar which is stirred for 24 hours in a reflux apparatus at 110-120‹ C. In a third example the latter process is effected with a mixture of distilled tar and 1 per cent of toluene sulphochloride.
Patent GB-626558-A (GB)
Title: Improvements in or relating to devices for retaining cables on sheaves
IPC: B64C13/02
Filed: 1947-05-28
Abstract: 626,558. Pulleys. HEIJMAN, H. May 28, 1947. No. 14199. [Class 78 (v)] A device for preventing cables 10 which are passed round pulleys 2 or sheaves, from running off, consists of a mainly V-shaped member, the legs of which form an angle of more than 90 degrees and which can be inserted with one leg 1 as a guarding pin into a pair of opposite bores in the pulley block mounting or in the frame at a small distance from the periphery of the guiding pulley or pulleys and is secured by springing the other leg 7 under a fixed hook 8 or the like on the mounting. As shown in Fig. 4, a single pulley 2 is mounted between plates 3 and 4 on a bolt 5 having a crown nut 6. The leg 1 is inserted in a pair of bores in the plates 3 and 4. The leg 7 is preferably at an angle of about 120 - 145 degrees with the leg 1 and is fixed under one of a number of hooks 8 formed on a washer 9. Two V-shaped guarding devices may be used if the cable 10 makes a bend of 90 degress round the pulley. When more than one pulley is used, one leg of the guarding device may consist of a guard pin 11 having a head 12 to which the resilient fixing leg is secured (Fig. 2). Alternatively, the guarding pin 11 may be provided with an axial bore 13 from the head end into which the leg 1 of the V-shaped member may be inserted.
Patent GB-915219-A (GB)
Title: Steel and articles made therefrom
IPC: C22C38/52
Filed: 1961-04-20
Abstract: An alloy steel, which is particularly suitable for parts of aircraft, e.g. undercarriages, contains in percentage by weight .Co.0.75- 6 .Ni.0 - 3 .Cr.0.5 - 5 .Mo.0.2 - 1 .C.0.4 - 0.7 .Si.1.5 - 3 .Mn.0.2 - 0.6 .V.0 - 0.1 .Fe.Balance The steel is heat-treated first in the range 1600-1750 DEG F., terminated by quenching, and is then tempered at not less than 600 DEG F.  It may be first air-cooled from the austenitizing temperature, followed by reheating and quenching, and a double tempering treatment may be employed.  Specification 766,090 is referred to.
Patent GB-1377814-A (GB)
Title: Transcription control for cassette tape player or the like
IPC: G11B15/02
Filed: 1972-03-27
Abstract: 1377814 Backspacing cassette tapes M E BACHMANN 27 March 1972 [5 April 1971] 14344/72 Heading G5R  A transcription control device 33 fits on to a cassette 16 in a recorder 15 and allows a treadle 114 to be operated to backspace a tape in the cassette. In operation, pressing the treadle causes a lever to be first rooked from position 111 to 1111, and then to be moved bodily to 111<SP>11</SP>; the lever is coupled by cable 103 to a slide 48 so that simultaneously the slide moves slightly to the left i.e. from the Fig. 3 position to that of Fig. 4 (not shown), and then substantially to the right i.e. to the Fig. 5 position (not shown). In the Fig. 3 (STOP) position, a ramp 49 (Fig. 9) on slide 48 forces a spring mounted socket 52 downwards to cause a spring loaded reel drive spindle 28 to be moved out of engagement with (and thus rendered unable to drive) a reel hub 26. In moving left to the Fig. 4 (PLAY) position, the ramp 49 rides off the top of socket 52 and allows it to be elevated by spring 55, thereby engaging spindle 28 once more with hub 26 and so allowing the normal recorder controls to be operated. In moving right to the Fig. 5 position, the socket is again lowered to disengage spindle 28, but in addition a toothed rack 63 on slide 48 rotates a wheel 60 to cause the reel hub for the tape supply reel to be forced to rotate a fixed amount in the rewind i.e. backspace direction. A further toothed rack 67 causes a further such backspacing when the treadle is released to return to the Fig. 3 position. An arm 88 allows a pinch roller 24 to be engaged/disengaged with a capstan 23, as required.
Patent GB-1146400-A (GB)
Title: Improvements in gas burners
IPC: F23D14/14
Filed: 1967-03-30
Abstract: 1,146,400. Flameless combustion burners. METTERS Ltd. 30 March, 1967 [21 Oct., 1966], No. 14421/67. Heading F4T. A burner used for grilling comprises two shell members each formed with an elongate aperture 16 and being secured together by flanges around their periphery 15 and the periphery 19 of the apertures to form two internal compartments, the lower shell being formed with openings 24 and 25 covered by refractory or gauze members 26, 27 on the outer surface of which a gas/air mixture burns after passing into the burner through inlet 22. The gas/air mixture is dispersed by a baffle 30 and the spacing between the shells increases from the perimeter towards the aperture 16.
Patent GB-490322-A (GB)
Title: Improved method and apparatus for detecting sound sources
IPC: G01S1/72
Filed: 1937-05-25
Abstract: 490,322. Locating sounds. SCRUBY, B., and ROBERTS, A. J. May 25, 1937, No. 14517. [Class 118 (ii)] In a system for determining the direction of a sound source, microphones 4, 5, mounted on a rotatable beam 11 are connected to thermionic amplifiers 15, 16 feeding cathode-ray tubes 19, 20, which give images of the sound waves on their screens. The screens are focused on a viewing screen 33, the light being reflected from a rapidly rotating inclined mirror 23. The final images 32 may be viewed directly or through a lens 35 and are brought into coincidence by rotating the beam 11 to remove the phase difference. In a modification, a right-angled prism is used in place of the mirror 23. The images on the screen 33 may be adjacent, or superimposed for accurate matching. As applied to the detection of aircraft a third sound receiver is necessary or a pair of receivers may be added arranged at right-angles to the original pair.
Patent GB-114580-A (GB)
Title: An Improved Holder for Hinge-hung Doors.
Inventor: HEFFERNAN EDWARD
IPC: E05C17/38
Filed: 1917-10-08
Abstract: 114,580. Heffernan, E., and Pascoe, R. N. Oct. 8, 1917. Pivot adjustments. - Relates to door holders of the friction-grip type for retaining hinged doors in an open or partly open position and for braking the movement of the doors, thereby preventing slamming. According to the invention a curved plate A gripped on each side by friction shoes is employed. The shoes b, c, are formed with end lugs e, f, which float in forked arms g springing from the bracket h screwed to the door, or the frame, as the case may be. In the arrangement shown in Fig. 3, the pressure spring consists of a bent wire k attached to the ends of the lower shoe and pressing on the middle part of the upper shoe. An inverted arrangement is shown in Fig. 8. A modification is shown in Fig. 4 in which a curved segment plate A, carried by the plate E and the hinge leaf G, works between arms L carrying the shoes o, p, the construction of which is shown in Fig. 5, the spring s passing through the slotted ends and pressing by the parts n on the outsides of the shoes. The curved plate may be attached to the door frame as shown in Fig. 1, or may be carried by the hinge leaf as shown in Fig. 7, in which arrangement a recess S is provided for working clearance of the tongue A.
Patent GB-1154424-A (GB)
Title: New Derivatives of Steroids and a method of preparation thereof
IPC: C07J63/00
Filed: 1967-03-30
Abstract: 1,154,424. D-homo-steroids. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. 30 March, 1967 [31 March, 1966; 27 June, 1966; 6 March, 1967], No. 14578/67. Heading C2C. Novel 16,17a-diketo- and 17,17a-diketo-D- homo-steroids of the general formulµ wherein the ring A may be saturated or aromatic, the radicals R and R 1 , which may be the same or different, are each a hydrogen atom or an alkyl radical having up to 3 carbon atoms, the substituent Z which is not present when the A ring is aromatic is a hydrogen atom or a methyl group; and the 5,6-bond may be double when the ring A is saturated, are obtained in a process which comprises reacting a diazoalkane of the general formula R 1 -CH=N 2  with a 16,17-diketo steroid of the general formula in an alkaline alcoholic solution. The diazoalkane may be liberated from a nitrosoalkylurea. As alkaline alcoholic solution there may be used methanolic potassium hydroxide. Pharmaceutical compositions containing the above compounds having hypocholesterolemic and norlipidemic properties are administered orally.
Patent GB-650719-A (GB)
Title: Improvements in photographic contact printing apparatus
IPC: G03B27/08
Filed: 1947-06-03
Abstract: 650,719. Photographic contact printers. PARKINS, F. W. C. June 3, 1947, No. 14612. [Class 98 (ii)] In a photographic contact printer having means for feeding at equal sprocket hole rates a pair of films of different lengths, due to shrinkage of one of them, between a pair of contact rollers defining a printing position, the longer film is guided along a fixed path such that the length thereof in contact with the other film is either straight or curved towards the other film, which is guided past the printing position so as to form a free loop, the curvature of which may vary and thus stretch the film surface in contact with the longer film to compensate for the shrinkage in the shorter film. The guide means for each film are symmetrically disposed on either side of the printing position. In the contact printer shown, the shrunk film is fed by a sprocket A<SP>1</SP> under a guide roller H, between the contact rollers I, E which define the printing position and then via a guide roller H<SP>1</SP> back to the sprocket. The longer film is fed to the printing position by a sprocket A, associated with a fly-wheel B, and passes around guiderollers C, D, D<SP>1</SP> and C<SP>1</SP>, of which the rollers D, D<SP>1</SP> are mounted on pivoted arms so that by adjustment thereof the length of film between these rollers may be curved towards the shrunk film. Specifications 483,014 and 518,971 are referred to.
Patent GB-767135-A (GB)
Title: Improvements in or relating to separation of niobium from tantalum
Inventor: ENGLAND PETER GEORGE
IPC: C01G33/00
Filed: 1954-05-18
Abstract: Niobium and tantalum are separated in a process comprising reducing the pentachlorides of the metals selectively to reduce the niobium chloride and removing the unchanged tantalum chloride by volatilization.  The reduction may be accomplished with a stream of hydrogen at 550 DEG C. and the tantalum pentachloride condensed by cooling.  Material containing niobium and tantalum may be chlorinated to form the pentachloride and then reduced.ALSO:Niobium, containing 0.2-0.3 per cent tantalum is prepared by heating a mixture of niobium chloride, separated from tantalum pentachloride, and magnesium. Niobium may also be produced by reduction of niobium trichloride with hydrogen at temperatures above 900 DEG C.