baber/WOPTO huggingface dataset:
Patent GB-800029-A (GB)
Title: Improvements in or relating to devices for controlling the transmission of electromagnetic waves
Inventor: GUNN JOHN BATTISCOMBE
IPC: H03C7/02
Filed: 1954-05-31
Abstract: 800,029. Semi-conductor devices. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 3, 1955 [May 31, 1954], No. 16037/54. Class 37. [Also in Group XL (b)] A device for controlling the flow of electromagnetic energy in a waveguide or other transmission line comprises a body of semi-conductor material placed across the path of the energy and means for varying the concentration of holes and electrons in the body so as to vary its conductivity. The body may consist of a thin slab 1 of germanium which is sufficiently pure to exhibit intrinsic conduction at room temperatures. One surface A of the slab 1 is etched, e.g. with H 2 O 2 , so that the parameter which determines the rate of recombination of holes and electrons at the surface (the surface recombination velocity S) is made as small as possible. The opposing surface B is abraded with e.g. carborundum or otherwise treated to make S as large as possible. An electric field applied to the slab causes a current I to flow in the direction indicated, the current flow consisting in a migration of holes in the direction h and a migration of electrons in the direction e. A magnetic field # applied in the direction indicated will cause both holes and electrons to be diverted to the surface B. Since this surface has a large value of S the concentration of holes and electrons and hence the conductivity of the slab is reduced. Reversal of the voltage or of the magnetic field causes an increase in conductivity. When used as a microwave attenuator the slab 1 is arranged with the faces A, B parallel to the elector vector and, in order to improve matching, at an angle # to the direction of propagation in waveguide 2. The guide is made of a non- ferromagnetic substance so that the magnetic field may be applied by means of permanent magnet (Fig. 3, not shown) arranged outside the guide. A coating of an insulating material, e.g. polystyrene, is applied to the surface of the slab 1 and leads 4 are provided for the application of the electric field. The angle # and the thickness of the slab are chosen to achieve a compromise between low insertion loss, reflection, response time and high maximum attenuation. Suitable values for the design parameters are given in the Specification.
Patent GB-754167-A (GB)
Title: Improvements in or relating to ball and socket joints
IPC: F16C11/08
Filed: 1954-05-31
Abstract: 754,167. Ball joints. THOMPSON PRODUCTS, Inc. May 31, 1954 [Jan. 22, 1954], No. 16070/54. Class 65 (2). A ball-and-socket joint for a tie-rod comprises a tubular housing 14 with an axially-extending keyway 19, the ball member 27 being rotatable and tiltable between bearing blades 30, 31 which are shiftably mounted in the housing and have lugs or projections 36 extending into the keyway to prevent rotation of the blocks in the housing. In the form shown, the keyway is formed by embossing a rib on the housing, which has a keyhole opening 17 opposite the keyway 19, for insertion of the ball, and tapers to a smaller portion 12 threaded for screwing on the end of a rod. The bearing blocks 30, 31 have conical cut-outs 35 to allow ample tilting of the stud. The block 30 is held in place by a screw-plug 41, and 31 is pressed against the ball by a spring bearing on a member 23 supported by a tapered plug 20; the member 23 has a central stem to limit movement of the block 31 against the spring. A lubricating fitting 45 is provided on the side of the housing.
Patent GB-218678-A (GB)
Title: The preparation of a washable paint and its method of application
IPC: B05D5/06
Filed: 1924-07-04
Abstract: 218,678. Witt, P. H. F. de. July 6, 1923, [Convention date]. Void (Published under Sect. 31 of the Act]. Painfs.-A paint for fabrics comprises oil paint of any known kind and colour together with a product known as Ballotini. The following substances may also be added to the oil paint : zinc white, spermaceti, Spanish white, gum-lac and a drier.
Patent GB-655255-A (GB)
Title: Improved apparatus for handling stands of pipe in a derrick
IPC: E21B19/14
Filed: 1947-06-18
Abstract: 655,255. Storing pipes in derricks. STANDARD OIL DEVELOPMENT CO. June 18, 1947, No. 16147. Convention date, Aug. 22, 1946. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 17, 1948.] [Class 85] A carriage A is mounted for movement on a powerdriven screw thread 24 positioned at one side of a derrick, and on an arm 34 of this carriage are pins 35 between which stands of pipe are received and held as by electromagnets 37. The carriage is moved over to one side of the derrick to position the stands of pipe in spaces 45 in a fixed arm 401 of a racking assembly B. Subsequent stands of pipe are positioned between pins 44 on vertically swingable rods. An auxiliary pipe elevator C is provided to move the stands into the space on the arm 34, whilst the upper and lower ends of each are steadied during the making and breaking of the joints and during subsequent movement to the storage position by assemblies O and E. Specifications 650,814 and 655,256, [Group XXII], are referred to. The Specification as open to inspection under Sect. 91 comprises also the subject-matter of Specifications 650,814 and 655,256, [Group XXII]. This subject-matter does not appear in the Specification as accepted.
Patent GB-350212-A (GB)
Title: Improvements relating to transformers, inductances and the like
IPC: H01F19/02
Filed: 1930-05-26
Abstract: 350,212. Transformers. IGRANIC ELECTRIC CO., Ltd., 147, Queen Victoria Street, London, and PAYMAN, H. S., 130, Hurst Grove, Bedford. May 26, 1930, No. 16159. [Class 38 (ii).] Relates to weak current transformers such as radio transformers in which high permeability alloys are used as core material, and consists in using such alloys only at the centre of the core, the outer parts being made of material of lower permeability. Examples are discussed in which 16 to 44 per cent of the total number of laminations in a core are of nickel-iron alloys arranged in the centre, the remainder being of silicon steel in two bunches, one at each side.
Patent GB-825974-A (GB)
Title: Improvements in or relating to portable keys for turning a socketed member
Inventor: NAYLOR DONALD RUSSELL
IPC: B25B33/00
Filed: 1957-05-23
Abstract: 825,974. Wrenches. ROSSER & RUSSELL Ltd. Feb. 17, 1958 [NIay 23, 1957], No. 16417/57. Class 61. A chuck key of the type comprising a shank 1 having one end 3 provided with or adapted to receive a handle and the other end 2 adapted to engage a socketed member, is provided with an axially slidable sleeve 5 urged by a compression spring 8 to a position where it at least partially shrouds the operating end 2 of the key to prevent engagement of the key unless an axial pressure of the key shank is applied and maintained by the operator. A dowel 6 secured to the shank engages in a slot 7 in the sleeve to allow limited sliding movement. In a modification the sleeve is replaced by a spring loaded plunger accommodated in the hollow operating end of the key.
Patent GB-1178607-A (GB)
Title: Pressure Operated Electric Switch Unit
IPC: H01H13/702
Filed: 1967-04-11
Abstract: 1,178,607. Retractive switches. INTERNATIONAL BUSINESS MACHINES CORP. 11 April, 1967 [26 April, 1966], No. 16424/67. Heading H1N. An elastomeric switch, for example as disclosed in Specification 1,134,507, comprising gold contacts, plated respectively on an insulating substrate 10 and an overlying insulating film 18, which are operable by an almost imperceptible movement of a ball 32, is provided with a push-button 36 acting on the ball 32 via a body 34 of resiliently deformable material, for example, half-an-inch thick, such that a more satisfactory " feel " is given to the manual operation of the switch. A metallic disc 40 may be fixed to the underside of the resilient layer 34 to modify the pressure transferred from button 36 to ball 32 in inverse relationship with the diameter of the disc 40.
Patent GB-458079-A (GB)
Title: Improvements in wallboards and the like
IPC: D21J1/08
Filed: 1935-06-06
Abstract: Wallboards, sheeting, and the like for divisional walls, the insulation of cooling chambers and other uses are made by treating vegetable fibrous material of a non-hygroscopic character, e.g. straw, rice-husks, or bamboo, with a mixture composed of silica, alumina, talc and magnesite (burnt or unburnt) all in powdered condition and having a solution of magnesium chloride as a binder, and shaping the mass.
Patent GB-145448-A (GB)
Title: Improved process for treating and scouring wool, woollen yarns and the like
IPC: C11D1/32
Filed: 1920-06-18
Abstract: 145,448. Bennert, C. Feb. 8, 1915, [Convention date]. Washing, processes and materials for.-Raw wool, woollen yarns and cloth, and mixed goods are scoured &c. by treatment with the alkaline salts of lysalbinic and protalbinic acids to which cleaning-materials such as ammonia salts, sodium carbonate, potassium carbonate, and soap may be added. The wool &c. may be scoured at a temperature of 70‹ C. The first-mentioned alkaline salts are prepared by heating albuminoid matter in alkaline solution, for example by heat ing 100 parts of glue in a solution of 15 parts of caustic alkali in 500 parts of water to 80‹-85‹ C. for from two to three hours, neutralizing the solution with weak formic acid, and then concentrating the solution. Impurities may be removed by treating with dry calcium or magnesium hydroxide, or both, filtering, and then adding sodium carbonate.
Patent GB-547557-A (GB)
Title: Centreless grinding machine
IPC: B24B5/18
Filed: 1940-11-15
Abstract: 547,557. Centreless grinding-machines. LIDKOPINGS MEKANISKA VERKSTADS AKTIEBOLAG. Nov. 15, 1940, No. 16556. Convention date, Nov. 4, 1939. [Class 60] The grinding-wheel or regulating-wheel of a centreless grinding-machine is carried by an over-slide which is mounted on an under-slide, the direction of movement of the two slides forming an acute angle. In the arrangement shown in Fig. 2, the grinding-wheel 1 is mounted directly on the bed 10, and the regulating-wheel 3 is mounted on an over-slide 20 supported by an under-slide 21, the directions of movement of the two slides forming an acute angle V which is equal to the angle, preferably 10 degrees, between the tangent-planes of the work-piece 6 and the wheels. The arrangement simplifies setting, since the angle V can be maintained constant, regardless of the size of the work-piece or wear of the wheels, merely by so adjusting the over-slide and the work-support 5 that the axes of the work-piece and regulating- wheel lie in a plane g-g which is parallel to the direction of movement of the over-slide. The work-support 5 is carried by a slide 22 on the over-slide. The regulating-wheel, instead of being mounted directly on the over-slide, may be mounted on a rotatable support 12 which, as described in Specification 547,556, permits the regulating-wheel to be tilted to one side or the other, thereby enabling the machine to be employed for through-feeding of a long work-piece in opposite directions alternately.
Patent GB-566641-A (GB)
Title: A new or improved method of, and machine for use in, manufacturing composite constructional units
IPC: B21D13/04
Filed: 1943-10-09
Abstract: 566,641. Making beams. HILLS PATENT GLAZING CO., Ltd., and THOMAS, B. H. K. Oct. 9, 1943, No. 16558. [Classes 83 (ii) and 83 (iv)] Corrugating.-In making composite constructional units such as beams or stanchions, comprising two or more longitudinals united and braced in spaced relationship by zig-zag or sinuous members, these members are formed by passing rod, strip or tubing between a pair of meshing star-wheels so that they are crimped to the shape of the teeth of the wheels and the crimped member is then fed between two longitudinals and the apex of each crimp is secured thereto by welding, riveting, &c. The rod &c. is passed through channel guides 19 between two removable intermeshing starwheels 3, 4, the tip of each tooth of which and the bases of the depressions between adjacent teeth being formed with tangential flat edges so that the apices of the crimped member are flattened to obtain appreciable face contact with the faces of the longitudinals. The longitudinals may be of strip, angle, channel or box section in form. The shafts of the starwheels carry cog-wheels 7, 8, meshing with cogwheels 9, 10, so that the teeth of the starwheels intermesh but do not touch each other. The shaft carrying the cog-wheel 10 is provided with a sprocket wheel 13 connected by a chain 14 to a sprocket wheel 15 driven by an electric motor through a spring-loaded clutch and reduction gear 16. Side plates 20 are fastened to the face of the wheel 4 to assist in guiding the bracing members therethrough. The width of the star-wheels is substantially equal to the width of the members. These members may be fixed centrally of the longitudinals and, if desired, two or more members may be fixed side-by-side in staggered relationship. The welding &c. operation may be effected after the crimped member is discharged from the machine or this operation may be effected as the crimped material passes from between the star-wheels.
Patent GB-563583-A (GB)
Title: Improvements relating to mechanical loading
IPC: E21F13/06
Filed: 1942-11-23
Abstract: 563,583. Conveying from working face in mines. NYBORG, T. G., and MINING ENGINEERING CO., Ltd. Nov. 23, 1942, No. 16570. [Classes 78 (i) and 78 (iv)] A loading machine for longwall mining comprises a wide mouthed shovel 6, a motor 2, mechanism driven thereby to reciprocate the shovel and a trough to receive the material from the shovel and feed it to a face conveyer disposed to one side of the machine and of the mouth of the shovel. The machine is in addition provided with pushing means by which it is advanced. The Figure shows an arrangement in which the machine is divided into sections about a line 10 so that the parts may be readily separated for flitting back in the space between the coal face and the conveyer. The motor may provide power to a hydraulic cylinder 12 and ram 13 which may be used to advance the machine into the work. A pivoted self-locking prop of adjustable length may be attached to the ram for this purpose. The Provisional Specification describes also the use of a winch and chain and alternatively a rack bar along which the machine is moved for the advancing into the work.
Patent GB-421123-A (GB)
Title: Improvements in or relating to the refining of mineral oil and the preparation of lubricating oil
IPC: C10G21/16
Filed: 1933-06-09
Abstract: <PICT:0421123/III/1> Mineral oils are separated into naphthenic and paraffinic fractions by treatment with wood tar acids alone, or with wood or coal tar acids in conjunction with a paraffinic solvent.  The coal tar acids used consist mainly of cresols and phenols, and the wood tar acids are preferably beechwood tars containing o-cresol, guaiacol and creosol.  Paraffinic solvents specified are ethane, propane, pentane, butane, gasoline or light naphtha, and are substantially immiscible with the naphthenic solvents.  Mineral oil such as an crude asphaltic oil is admitted to the centre of a contact chamber in which cresylic acid and propane flow in countercurrent. The paraffinic fraction A containing some cresylic acid is drawn off at the top of the chamber and after removal of propane by reduction of pressure or by heating, is distilled to remove cresylic acid.  The resulting paraffinic lubricating oil may be further treated with dilute caustic soda to remove traces of cresylic acid and then with sulphuric acid and clay.  The naphthenic fraction B is drawn off at the bottom of the chamber and flows downwards in counter-current with liquefied propane in a second chamber.  A paraffinic fraction B formed in this second extraction is returned to the main extraction chamber, and the naphthenic fraction B is freed from propane and cresylic acid as before.  The addition of the paraffinic fraction assists the separation of the layers, and increases the selectivity of the naphthenic solvent.  In a modification of the process, the paraffinic fraction is freed from propane before admission to the main extractor.  The extraction chambers may be heated and filled with packing material, or agitating means may be provided.  The solvents may be mixed with sulphur dioxide, aniline, pyridine, furfural or other solvents for asphalt and similar high molecular constituents.  Wax may be removed from the crude oil before treatment, or from the paraffinic fraction obtained.
Patent GB-785871-A (GB)
Title: Improved device for regulating the height of the feed table in wood-working machines
IPC: B27C1/02
Filed: 1956-05-29
Abstract: 785,871. Wood-working machines. ETABLISSEMENTS GUILLIET, COMMERGNATGUILLIET ET CIE. May 29, 1956 [Feb. 29, 1956], No. 16624/56. Class 145. The feed table 14, Fig. 1, of a woodworking machine such as a planing or trizing-up machine is mounted on parallel links 15, 16, 17, 18 counterbalanced by a spring 26 and the adjustment of the links for setting the height of the table is made by a friction-locked control lever 38. The spring 26 is connected at one end to an arm 24 on the link 16 and at the other to a variable length rod 27, 28 which is connected to a pivot 23 on the machine frame and is adjustable by a turnbuckle 29. Movement of the table to alter its position is effected through an arm 31, Fig. 4, fixed to the link 17, by the control lever 38 which is pivotally mounted on the arm. A bolt 43 screwed in the lever 38 is urged into contact with the face of a graduated segment 34 on the machine frame by a spring 41 to effect locking. In operation, the lever 38 is moved against the spring 41 so that the bolt 43 clears the segment, thus allowing the arm 31 to be swung vertically until the desired position of the table indicated by a pointer 33 co-operating with the segment 34 is reached, upon release of the lever 38 the table 14 is locked in position.
Patent GB-1140434-A (GB)
Title: Process for making symmetrical tetrachloroacetone
IPC: C07C45/65
Filed: 1967-04-11
Abstract: 1,140,434. Symmetrical tetrachloroacetone. WYANDOTTE CHEMICALS CORP. 11 April, 1967 [25 April, 1966], No. 16648/67. Heading C2C. Symmetrical tetrachloroacetone is prepared by hydrogenating pentachloroacetone or hexachloroacetone in the presence of a palladium catalyst. The catalyst comprises metallic palladium which may be carried on a suitable support material e.g. activated carbon, or an inorganic salt. The finished catalyst preferably contains from 0À5-10 weight per cent of palladium. It is preferred to use at least 1 mole of hydrogen per mole of penta- or hexachloroacetone, an excess of hydrogen usually being employed. Atmospheric pressure is preferably employed.
Patent GB-389326-A (GB)
Title: Improvements in or relating to radio and other high frequency receivers
IPC: H03D11/02
Filed: 1932-06-13
Abstract: 389,326. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London. -(Assignees of Roberts, W. van B. ; 155, Hodge Road, Princeton, New Jersey, U.S.A.) June 13, 1932, No. 16707. Convention date, June 12, 1931. [Class 40 (v).] Received wireless or like signals are transmitted from one resonant circuit L1, L<1>1, C1 to another L2, L<1>2, C2 having a resistance characteristic periodically positive and negative, and positive resistance is introduced simultaneously into both resonant circuits to produce a quenching action. The circuit L2, L<1>2, C2 forms a split common tuned input circuit to a super-regenerative stage including a pair of valves 3, 4 in opposition. A common output circuit includes a reactance 14 coupled to the input circuit, and a circuit C2, 12 is connected between the two portions L2, L'2 of the input circuit and is tuned to an interruption frequency, which is fed to the circuit from a source F. A preceding stage includes a pair of valves 1, 2 in opposition, the split common tuned input circuit L1, L<1>1, C1, a condenser c1 between the portions L1, L<1>1, and a common output circuit including a reactance 5 coupled to the input circuit. The output circuit 5 is coupled to the succeeding input circuit, and the condensers c1, c2 are coupled by conductors 8. According to a modification, the valve 1, and the magnetic intervalve coupling are omitted, so that coupledcircuit selectivity is obtained instead of cascade super-regeneration, Fig. 2 (not shown).
Patent GB-678990-A (GB)
Title: Manufacture of sulphonated polystyrene
IPC: C08F8/34
Filed: 1950-07-05
Abstract: Sulphonated polystyrene capable, as free acid or as alkali metal salt, of dissolving in water to give a clear solution, is made by treating polystyrene with addition products of sulphuric anhydride and cyclic ethers, e.g. dioxane or thioxane, preferably in the presence of a solvent, e.g. carbon tetrachloride, ethylene dichloride and tetrachlorethane.  The product may be recovered from the reaction mixture by (a) adding water, centrifuging and evaporating the aqueous layer to dryness directly or after addition of soda lye; (b) distilling off part of the solvent under reduced pressure, mixing with water, neutralizing with soda lye, steam distilling to remove the remainder of the solvent and evaporating to dryness; or (c) adding methanol, removing solvents by distillation under reduced pressure and at the same time adding water drop-wise to form an aqueous solution of the sulphonated polystyrene, which may be neutralized with soda lye to form the sodium salt.  The products may be added to detergents and aqueous dispersions of dyestuffs and germicides or used in leather dyes and dressings or as thickening agents for cloth printing pastes.