baber/WOPTO huggingface dataset:
Patent GB-422909-A (GB)
Title: Multi-grid thermionic valve
IPC: H01J21/12
Filed: 1933-06-17
Abstract: 422,909. Thermionic valves. LOEWE, S., 10, Wiesenweg, Steglitz, Berlin. June 17, 1933, No. 17292. Convention date, June 18, 1932. [Class 39 (i)] Two grids of equal controlling effect arranged on a common surface between the cathode and the cylindrical anode of a thermionic valve are each formed so that the controlling action differs at different points along the length of the grid. Each grid may comprise semi - cir. cular, spiral turns 1, Fig. 2, of increasing pitch, forming a zig-zag with or without axial parts 2, the two grids being placed symmetrically on opposite sides of the cathode. In a modification, the grids are inter-engaging helices 3, 4, Fig. 3, of varying pitch, the lengths of the helices being chosen to give the same controlling effect to the grids. In another modification, the grids are inter-engaging combs, flat or bent to a cylinder, with straight teeth unevenly spaced or with teeth of triangular or sinusoidal shape. Space-charge grids and screening grids may be added and the latter may be connected to the cathode. Specification 382,945 is referred to. The Specification as open to inspection under Sect. 91 comprises also a modification, Fig. 7 (Cancelled), with comb-shaped, uniform grids having pointed teeth. This subjectmatter does not appear in the Specification as accepted.
Patent GB-775241-A (GB)
Title: Improvements relating to electron discharge tubes
IPC: H01J1/26
Filed: 1955-06-15
Abstract: 775,241. Thermionic cathode constructions. GENERAL ELECTRIC CO. June 15, 1955 [June 15, 1954], No. 17301/55. Class 39(1) The cathode 7 is provided with a tapered needle-like extension 23 which is inserted into the spacer 6 and then bent round (as shown in dotted lines) to make contact with the lead 19. Preferably both ends 23, 25 are tapered with an arcuate cross-section for easy insertion into the spacers and for easy insertion of the heater 18. As shown the cathode is tubular and indirectly heated but it may be the directly heated ribbon type.
Patent GB-1247963-A (GB)
Title: Process and apparatus for the separation of granular material
IPC: B03B4/02
Filed: 1969-04-02
Abstract: 1,247,963. Pneumatic separating. BUHLER A.G. GEB. 2 April, 1969 [17 April, 1968; 11 Nov., 1968], No. 17390/69. Heading B2H. Apparatus for performing a gravity concentration process comprises an inclined gaspervious support 1 for material presorted into a lower stratum rich in heavy fractions and an upper stratum poor in heavy fractions and fluidised by air passed through the support from below, the support being vibrated so that the lower stratum is dispensed at outlet 6, and the upper stratum at outlet 8. The presorting process is carried out along a separate portion 26 of the support. The upper stratum overflows from the portion 26 through an aperture 30 in the side wall 29, whilst the lower stratum appears at the opening 40. The. support 1 consists of a pervious sheet 3 carried by a perforated sheet 4 and upright partitions 5, to which the sheets 3, 4 are adhesively secured. The vibrator 18 is an eccentrically-loaded motor-driven shaft. The cover plate 21 is provided with an inspection window 42. Compressed air may be supplied from below, or air removed by suction from above. A blowing nozzle 32 may be provided to remove any light fraction carried up in the lower stratum. In alternative embodiments, the presorting portion is symmetrically placed, and a wedge portion (34) (Fig. 6, not shown) may be included to split and divert the lower stratum to two separate outlets (6, 60).
Patent GB-1272943-A (GB)
Title: Road marker
Inventor: TUCKER HARTWELL F
IPC: E01F9/06
Filed: 1969-04-02
Abstract: 1,272,943. Road surface markers. TUCKER ASSOCIATES Inc. 2 April, 1969, No. 17407/ 69. Heading E1G. [Also in Division G2] A directional arrow head road marker comprises an irregular substantially tetrahedral pyramid on a triangular or blunted triangular base having two equal major edges from which extend adjoining inclined faces. Typically these faces are equally inclined to the base and carry reflex reflectors as 31 which may be coloured reflecting green rearwardly from the point of the arrow head and optionally also red in the direction of the arrow. Figs. 12 to 16, not shown, show roads with traffic lanes defined by such road markers, the body of which may be of moulded synthetic e.g. acrylic resin and which may be fixed to the road by epoxy resin adhesive. Coloured glass covers may be applied over the reflex reflector elements formed by moulding in the body.
Patent GB-261658-A (GB)
Title: Type-cleaning device for typewriters, calculating machines and the like
IPC: B41J29/17
Filed: 1926-07-12
Abstract: 261,658. Kleinschmidt, E. July 12, 1926. Types, cleaning. - A device for cleaning the types of typewriters and like machines consists of a handle a provided at one end with an axially directed brush b, and at the other end with a hardened steel spike c having a bent point.
Patent GB-716835-A (GB)
Title: Improvements in or relating to syringes for medical use
IPC: A61M5/178
Filed: 1952-07-10
Abstract: The outer end of the barrel of a hypodermic syringe is of enlarged bore so as to accommodate the piston freely during sterilization, without dismantling the syringe.  The end cap has a number of holes so that water can pass through the syringe and out through the cap during sterilization.
Patent GB-364509-A (GB)
Title: Improvements in and relating to protective systems for electron discharge devices
IPC: H03F1/54
Filed: 1931-06-16
Abstract: 364,509. Thermionic valves. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Andrews, P. D. ; 9, Ferry Street, Schenectady, New York, U.S.A.) June 16, 1931, No. 17505. Convention date, June 23, 1930. [Classes 39 (i) and 40 (v).] Overheating of an electrode such as an anode is prevented by the provision of means responsive to heat radiated from the electrode so as to control an energizing circuit of the valve. As shown, a tellurium-constantan thermocouple 14, mounted in a housing 17 with a lens 16, is energized by heat radiated from the anode 4 of a transmitting valve, so as to control a relay 15 in the keying circuit 12, 13. High-frequency oscillations are supplied from a source 5 to the grid circuit, which includes a resistance 10 of such value that the potential of the grid is sufficiently negative to prevent a current through the valve. Closing of the key 12 causes the relay 13 to short-circuit the resistance.
Patent GB-222233-A (GB)
Title: Improvements in or relating to adjustable and expanding boring heads and reamers
IPC: B23B29/034
Filed: 1923-07-06
Abstract: 222,233. Bradley, J. W., Perkin, L. C., and Armitage, G. July 6, 1923. Boring bars and heads; reamers.- In a boring-head, reamer &c. which is an improvement on that described in Specification 124,866, the cutters 44 are adjusted by a sleeve 26 having inclined recesses 27 coacting with the cutters, the sleeve being splined at 29 to a central body composed of four parts 1-4 of different diameters and moved axially by a member A having screw threads 8, 9 of different pitch but similar sense. The member A has recesses 23 which receive projections on a rotatable collar 12 having vernier or other graduations 14 co-operating with a pointer 49 on an outer stationary sleeve 32. Balls or round-ended screws 6, 19 situated in screwed recesses in the collar 12 and sleeve 32 respectively engage annular grooves 5, 18 in the body and collar to hold the parts rotatably in position. An end-plate 40 attached to the sleeve 32 encloses the cutters and carries locking-screws 42. The central body may be replaced by a sleeve 60, Fig. 10, mounted on a boring-bar 50 and traversed by a screw 51, rotated by differential gearing 56 and engaging a nut 62 attached to the sleeve 60. Alternatively, the sleeve 60 be keyed to a plain boring-bar in a traversed-work machine. Specification 124,865 is also referred to.
Patent GB-416948-A (GB)
Title: Movable indicative rubber pockets for putting and other games
IPC: A63B57/00
Filed: 1933-06-21
Abstract: 416,948. Golf-practising appliances. BROWN, J. G., 4, Palgrave Road, Stamford Brook, London. June 21, 1933, No. 17666. [Class 132 (ii).] A golf hole or pocket for practising on carpets, grass, or other surfaces comprises a circular base 10 of stiff material and a vertical cylindrical wall 12 of different and more resilient material, such as thin sheet rubber, adapted to yield and permit the ball to enter the pocket. An annular bottom 13 is formed integral with the wall 12 to receive the disc 10, which has a tongue 17 adapted to be pressed down into the earth to hold the pocket in place. The plate 10 may be marked with an arrow 21, and an auxiliary rotatable arrow may be mounted on a securing pin passing through the hole 24. The disc 10 may be made of metal, cardboard, vulcanized fibre, or moulded material, and may be corrugated or ribbed.
Patent GB-515854-A (GB)
Title: Improvements in or relating to electron discharge devices
IPC: H01J19/42
Filed: 1938-06-14
Abstract: 515,854. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd., BLACK, D. H., and BACK, R. R. June 14, 1938, No. 17675. Addition to 494,100. [Class 39 (i)] . A thermionic valve comprises an indirectlyheated cathode aligned with an aperture in a mica or like thin-sheet insulating bridge B without rubbing by means of a resilient tongue formed by suitably cutting the bridge at or near the free end of which the cathode is fixed. The tongue may be a simple U-shape, or may have inclined extensions E, or further cuts S may make oppositely directed tongues. The cathode has a flattened end which fits into a corresponding aperture in the tongue. The grid may be supported on the same or on a separate mica spacer. To reduce microphony the valve may be mounted in a second envelope filled with glass wool.
Patent GB-938746-A (GB)
Title: Improvements in or relating to track rings for radial piston hydraulic pumps and motors
Inventor: LOMNICKI ZBIGNIEW ALEXANDER
IPC: H01P1/15
Filed: 1960-05-19
Abstract: 938,746. Cams. BOULTON PAUL AIRCRAFT Ltd. May 18, 1961 [May 19, 1960], No. 17691/60. Class 80 (3). [Also in Groups XXVIII and XXIX] A cam track ring, for a radial-cylinder pump or motor having five or more pistons, has a running surface defined by an equation claimed whereby the pump produces a constant output, and the motor a constant torque. For a variable displacement pump or motor the track ring varies in cross-section along its axis so that axial movement of the ring relative to the pistons varies the pump or motor displacement.
Patent GB-303530-A (GB)
Title: Improvements in or relating to the preservation of eggs for the use of bakers and confectioners
IPC: A23B5/00
Filed: 1927-07-04
Abstract: 303,530. Pulvo, Ltd., Bolton, W. F., and Read, C. V. B. July 4, 1927. Preserving liquid eggs.-Egg yolks or the mixed yolks and whites are preserved by adding common salt, boiling under vacuum at a temperature insufficient to cause coagulation, e.g. 130‹ F., and then adding lactic acid. In the process described, yolks and whites after mixing in a disintegrator 1, Fig. 4, which may consist of two toothed wheels 22, rotating, in engagement, in opposite directions is introduced through a funnel 28 into a preheater 2 when it is evenly distributed bv a rose 30 over a drum 24 internally heated by steam and having a spiral track 25 on its periphery for the egg matter. The egg material next passes to a storage vessel 3, Fig. 3, having a stirrer 34 and a water jacket. 32 heated by addition of steam. The material is heated to 138‹ F. in the preheater 2 and kept at this temperature in the vessel 3. The boiling is effected in a vessel 4, Fig. 2, which is first evacuated by connection through a condenser 6 to a vacuum pump 5 having a water jacket for cooling. The desired amount of egg material is next drawn into the vessel 4 from vessel 3 through a valve 52, the vacuum connection is broken off and salt added and mixed with the material by a stirrer 38. The material is then boiled under vacuum by means of a steam-heated hot water jacket 36, e.g. for ten minutes at 130‹ F. and at a vacuum of 27.5 inches. The vacuum is then cut off and the water removed from a water trap 7 provided on condenser 6 and a corresponding quantity of distilled water is added to the lactic acid and which is now introduced into vessel 4 through a vaporizer from a receptacle 41. The lactic acid is passed from receptacle 41, through a cock 43, Fig. 6, to a jet 44, and air is simultaneously admitted through a cock 47 in a branch 46, the mixed air and lactic acid entering the vessel 4 through a choke bore 45. The stirrer 38 is rotated during the introduction of the lactic acid. The vacuum in vessel 4 is next broken and the egg material drawn off through the valve 52 and a filter 16, formed of sheets 49 of acid-proof wire gauze, to a receptacle 9, whence it may be filled into tins through cocks 51 which may have dust shields. The receptacle 9 has a valved connection to vacuum pump 5. The preheater 2, and the storage and vacuum vessels 3, 4 have inspection windows. The inner surfaces of the apparatus may be enamelled. In preserving mixed yolks and whites 0.5-3 per cent of salt and 0.2-2 per cent of 1.2 specific gravity lactic acid is used, and for yolks alone 0.5-3 per cent of salt and 0.25-1.5 per cent of the lactic acid. Where the yolks only are treated, the separated whites may be desiccated and the eggs reconstituted before use.
Patent GB-463332-A (GB)
Title: Improvements in or relating to bearings for gyroscopic apparatus
IPC: G01C19/38
Filed: 1935-06-20
Abstract: 463,332. Fluid bearings; gyroscopic apparatus. SPERRY GYROSCOPE CO., Inc. June 20, 1935, No. 17732. Convention date, July 11, 1934. [Class 12 (i)] [Also in Group XX] In gyroscopic apparatus, such as a directional gyroscope or artificial horizon, and particularly for aircraft, comprising a rotor, a supporting frame therefor adapted to tilt with the gyro axis, a second frame or ring supporting said first or rotor-supporting frame, and a third frame or outer casing supporting said second frame, the support between the rotor and the rotor-supporting or first frame and/or between said first frame and the second frame and/or between said second frame and said third frame or outer casing is in the form of spaced air bearings confining movement of the element supported thereby to angular movement about a single axis. In a directional gyroscope, the ring 3 is supported in the casing 1, Fig. 1, by vertical bearings 4, 5 each comprising a block 6 secured to the casing 1 and having a cup surface, and a co-operating button member 10 secured to the ring 3. The casing 1 is connected at 2 to suction apparatus, air being thus drawn into the bearings through bores 7, 17, 18 in the blocks 6. The cup and button surfaces may be spherical, in which case their centres of curvature are non-coincident with the centre of the apparatus ; the decrease between the surfaces is less at the edges than at the bottom, this being effected by making the surfaces of the same curvature if they are substantially hemispherical, whereas if they are shallow, the curvature of the button is less than that of the cup. Some air passes through passages 13, 14 in the button into passages 16, 16<1> in the ring 3 communicating with the horizontal bearings 21, 21<1> for the rotor-carrying frame 31. Each ofthese bearings comprises, Fig. 4, a button 22 mounted in the ring 3 and a co-operating cup 21 in the rotor-carrying frame. Air from the passages 16 passes through bores 25, 25<1> to provide the air film, and is also supplied through channels 30 in the rotor-carrying frame 31 to the rotor bearings which comprise, Fig. 2, buttons 33 secured in the rotor-carrying frame co-operating with cupped seats 35 in the rotor 38. The rotor is spun by air issuing from jets 36, 36<1> ; alternatively, or may be led into the interior of the rotor and escape tangentially to spin the rotor by reaction. Air escapes through lateral blow holes 39, 39<1>, Figs. 1 and 5 in the bearing-buttons 22, and the member 21 forms a shield which normally partially covers these holes ; an erecting torque is developed upon inclination of the rotor casing. The gyroscope may be set from a magnetic compass and may be provided with caging devices. The gyroscope may be made throughout of non- magnetic material such as aluminium alloy or brass, thereby avoiding magnetic disturbances and binding of the bearings due to temperature changes. The application of the invention to an artificial horizon is also decribed. Specification 463,396, [Group XX], is referred to.
Patent GB-694011-A (GB)
Title: Improvements in or relating to magnetic recording and reproducing systems
IPC: G11B5/465
Filed: 1951-07-26
Abstract: 694,011. Magnetic recording and reproducing apparatus. DICTAPHONE CORPORATION. July 26, 1951 [July 27, 1950], No. 17745/51. Class 40 (ii). In a magnetic recording and reproducing apparatus employing a single head for both recording and reproducing, and in which a high-frequency bias signal applied to the head is gradually attenuated at the end of the recording period to demagnize the magnetic circuit, means are provided for preventing magnetization of the magnetic circuit by the reproducing circuits, comprising a time delay means which render the input stage of the amplifier inoperative for a predetermined time interval. In the embodiment described, the attenuation of the high-frequency bias signals at the end of a recording period are effected by condensers 127, 147 which cause the high tension voltages on the anodes of the oscillator stage 10 and its amplifier stage 11 respectively, to die away smoothly when switched off at the end of a recording operation. In order to prevent any remaining bias signal producing charges on the grid condenser 166 of the input stage 13 of the reproducing amplifier when the magnetic head 87 is switched for reproducing, and the charges subsequently discharged through the magnetic head leaving it partially magnetized, the input amplifier stage 13 is rendered inoperative during recording, by connecting the control grid, through switch arm 164, to a source of high-potential through a high-value grid leak resistor 174 whereby a small amount of grid current passes and charges a shunt condenser 166. When the switch arm 164 is moved to the reproduce position, the condenser 166 is connected through the winding 86 of the magnetic head 87 to earth. Any bias signals remaining cannot charge the condenser 166 because the grid is biased negatively by the charge already on the condenser 166, which therefore gradually discharges through resistor 174 so that the input stage 13 becomes operative only after sufficient time for the bias signals to have attenuated to zero. An alternative arrangement is shown in Fig. 2 in which a resistor 248, connected from the control grid of the input stage. to earth, replaces the resistor 174, and a resistor 256, of high value relative to a grid-bias resistor 252, is connected in parallel with a high-value condenser 254. The switch arm 164 is connected between the lower end of the grid-bias resistor 252 and earth in such a manner that it is opencircuited during recording so that the control grid is held at a greater negative potential with regard to earth, and charges the condenser 254. The value of the condenser 254 is such that the high negative grid voltage is maintained long enough when the switch connection is restored, to render the stage inoperative until the high-frequency bias signals have attenuated to zero. Specifications 670,246 and 680,172 are referred to.
Patent GB-447812-A (GB)
Title: Improvements in or relating to the manufacture of wool-like artificial fibres
IPC: D01D5/22
Filed: 1935-06-20
Abstract: Wool-like artificial fibres are obtained by subjecting freshly coagulated and still plastic filaments to the action of a gaseous medium in eddying motion so as to impart a curl to the filaments. After curling, the filaments may be at once stapled.  The curling is conveniently carried out in a tube a, Fig. 1, having an ejector-like funnel c for the entry of the filaments and a side tube d for the supply of gaseous medium, and this latter tube may be arranged tangentially so as to increase the eddying effect in the tube a; the same effect may also be achieved or amplified by the fitting of a <PICT:0447812/IV/1> <PICT:0447812/IV/2> <PICT:0447812/IV/3> <PICT:0447812/IV/4> helical guide e, Fig. 4.  The curled filament may be collected in a hardening bath, or they may be stapled as by means of a rotating blade l.  Fig. 6 moving between plates k on which the tubes a are mounted, or alternatively by a reciprocating member m, Fig. 7, carrying a series of blades m<1> or provided with a series of openings having knife edges.
Patent GB-200529-A (GB)
Title: An improved device for preventing damage due to back-firing in internal combustion engines
IPC: F02M1/00
Filed: 1923-07-10
Abstract: 200,529. Bates, J. F. July 10, 1922, [Convention date] Check lift valves; valve stops; adjustable. - Means for preventing damage from backfiring and for admitting extra air to an internal-combustion engine comprise a casing 1 connected to the induction pipe by a flange 2 and to the carburettor or vaporizer by a branch tube 13, the casing being closed at the bottom by a spring-loaded relief valve 6, and the branch pipe containing one or two self-closing check valves 15. The valve 6, Figs. 2 and 4, coacts with an inverted cup-shaped seat 5 secured to the bottom of the casing 1 and provided with a port 18 to prevent the formation of a vacuum therein. The valve 6 may be opened, to admit extra air, by an arm 23 carried by a hand-operated shaft 24. An adjustable pin 17 is provided to prevent the valve 15 from opening to such an extent that it will not close by gravity.
Patent GB-546024-A (GB)
Title: Improvements in or relating to electric resistance heating units
IPC: H01B7/16
Filed: 1940-12-19
Abstract: 546,024. Steel alloys. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Dec. 19, 1940, No. 17892. Convention date, Dec. 29, 1939. [Class 82 (i)] [Also in Groups XI and XXIII] A helical resistance wire 1 is enclosed in a sheath 2 consisting of an alloy of chromium 17-19 per cent., nickel 8-11 per cent., silicon 2-3 per cent., carbon 0.8 per cent., manganese not above 1.5 per cent., sulphur not above 0.03 per cent., and columbium at least 8-10 times the carbon content. Alternatively, the sheath alloy may comprise nickel 30-80 per cent., chromium 10-20 per cent., and the remainder iron, except for minor quantities of carbon, manganese, silicon, phosphorus, sulphur and copper. The ends of the wire 1 are connected to rods 3, 3a which may be of the same material as the sheath, or of steel containing carbon 0.15-0.25 per cent., manganese 0.3- 0.6 per cent, phosphorus 0.05., and sulphur 0.05 per cent.
Patent GB-274089-A (GB)
Title: Arrangement in electrical hot water cisterns for preventing loss of heat
IPC: F24H1/20
Filed: 1927-07-06
Abstract: 274,089. Akt.-Ges. Kummler &. Matter. July 6, 1926, [Convention date]. Heating by electricity.-In a liquid heater comprising inner and outer shells 10, 12, which may be of sheet metal, separated by heat insulating material, the inner shell is supported at its lower end by a cylinder 16 of heat insulating material fixed to the outer shell, and the hotwater discharge pipe 32 passes through the shells externally of cylinder 16. The member 16 may comprise a short tube of wood or insulated metal. Insulating blocks 21 secured to the upper end of the outer shell keep the inner shell in the correct position. The inner shell is provided at the lower end with an inlet pipe 31 and a closure plate 25 carrying an electric heater 26 and a thermostat 27. The inner shell is formed at the top with a central domeshaped portion 34 to which is secured an outlet pipe 32 with side inlet orifices 35. The pipe 32 is fitted with a cap 37 which may be removed to provide a supplemental or alternative outlet.