baber/WOPTO huggingface dataset:
Patent GB-834099-A (GB)
Title: Improvements in transistor inverters for use with fluorescent tubes
IPC: H05B41/282
Filed: 1957-10-22
Abstract: 834,099. Supply systems for discharge lamps. WIDAKOWICH, M. Oct. 22, 1957 [Oct. 22, 1956], No. 32933/57. Class 38 (4). [Also in Group XL (c)] A transistor inverter circuit for supplying fluorescent tubes whereby the output current remains substantially constant and independent of fluctuations in the D.C. supply voltage comprises a stray field transformer having a primary winding 4 energized from a battery 2, through a transistor 3 controlled by a feedback winding 5 connected between the base and emitter giving an output frequency proportional to the D.C. input voltage. The secondary winding 6 is coupled to a tube 7. A push-pull arrangement giving a symmetrical output is described which may have an additional transformer primary winding connected in the output transformer common primary connection developing additional potential on the rapid change of the currents at positive and negative peaks, which is added either to the primary or secondary output voltages of the output transformer. The additional transformer primary winding may alternatively be connected in series with a capacitor across the output transformer primary winding. The sawtooth voltage output may be changed to a square-wave type by the addition of a second stage feeding the output transformer, the second stage being switched by a circuit similar to that described.
Patent GB-486307-A (GB)
Title: Improvements in and relating to electric discharge devices for circuit control
IPC: H01J17/00
Filed: 1936-12-01
Abstract: 486,307. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., and KNIGHT, H. DE B. Dec. 1, 1936, No. 32934. [Class 39 (i)] [Also in Groups XXVII and XXXV] A circuit-controlling device comprises a discharge device in which the gas or vapour pressure is periodically reduced by mechanically operated means to initiate a periodical discharge. The pressure may be reduced by increasing the volume of the device or by means of a pump connected thereto through valves which may be controlled by cams and may consist of perforated discs or grooved drums. Two discharge chambers comprise an electrode 2, Fig. 1, secured to a member 3 which is fitted with a cylinder 6, electrodes 8 mounted on movable pistons 7 and serrated insulating cylinders 5 which define the discharge space. The piston 7 may be replaced by a flexible diaphragm. The pistons may be operated by a cam on an engine crank-shaft when the devices 18, Fig. 2, are used in ignition systems to produce sparks across the points 17. As shown the devices are used to discharge and charge a condenser 13 through a transformer 14. The sparking-plug may be combined with the discharge device to form a unit. Specification 472,826, [Group XXXV], is referred to. Reference has been directed by the Comptroller to Specification 446,797.
Patent GB-1443839-A (GB)
Title: Lithium cobalt manganese ferrite
IPC: C04B35/26
Filed: 1974-07-25
Abstract: 1443839 Lithium cobalt manganese ferrites AMPEX CORP 25 July 1974 [9 Aug 1973] 33013/74 Heading C1J A ferrite has the following composition wherein x = 0À01 to 0À030, y = 0 to 0À25, z = 0À05 to 0À08 and w + m = 0À15 to 0À3. Examples describe ferrites with and without the zinc. In a preparation, oxides and carbonates are mixed and heated to 600‹ C., the resulting mixture of oxides are ball-milled, slurried with isopropyl alcohol, ground, dried and heated at 900‹ C. for 2 hours, the resulting ferrites are again ground, dried and sieved as above, mixed with polyvinyl alcohol binder and stearic acid lubricant and heated at 1000-1100‹ C. The ferrites may be used in memory cores.
Patent GB-188986-A (GB)
Title: Improvement connected with water heaters
IPC: F24H1/18
Filed: 1921-12-09
Abstract: 188,986. Aird, K. Dec. 9, 1921. Heating water.-A hot-water circulating tank B is provided with a dome A, smaller in diameter than the tank B, from the upper end of which the delivery pipe C leads, the outflow D from the boiler communicating with the pipe C near the top of the dome.
Patent GB-632781-A (GB)
Title: Photographic enlarging apparatus with automatic focusing provision
IPC: G03B27/36
Filed: 1945-12-08
Abstract: 632,781. Photographic enlargers. PASQUET, R. L. Dec. 8, 1945, No. 33235. Convention date, March 17. [Class 98 (i)] In a photographic enlarger of the kind in which the enlarging assembly, comprising a lamphouse, negative-holder, and lens, is mounted on a parallel motion linkage from which the focusing movement is transmitted to the objective for automatic focusing thereof, a cam co-acting with the lens carrier or a part fixed thereto is pivoted to the linkage near the assembly and is jointedly connected to an arm of the linkage so that when the enlarging assembly is lifted or lowered the jointed connection transmits rotary motion to the cam which thereby automatically adjusts the lens. A slidable platform may be arranged below the enlarging assembly and connected to the linkage by a mechanism which varies the position of the platform to maintain it central with respect to the optical axis. As shown, the lamphouse 16, negative-carrier 8, and objective 1, forming the enlarging assembly, are mounted on a support 4 pivotally connected by two pairs of equal parallel arms 5, 5a to a pillar 6 rigidly mounted on a base 29. A cam 11 is rotatably mounted on the pivot 7a of the linkage, and jointedly connected by an arm 13 to an arm 5. The objective 1 has screw-thread adjustment in its carrier 3, which has a roller 12 engaging cam 11. The linkage may be clamped by a slotted rod 33 and a screw 34. Displacement of the projection table 26 is governed by a cam 19 fast with an arm 5a actuating a spring-biassed lever 20 pivoted to the pillar 6 and linked to a bell-crank lever 23 with a wheel 24. A spring- loaded chain 25, attached at one end to the base 29, passes round wheel 24 and is secured to a cradle 28 supporting the platform 26 and running in guides in the base under the opposed actions of chain 25 and of return-springs. The Specification as open to inspection under Sect. 91 states that the weight of the enlarging assembly may be balanced by springs or counter-weights, that the pivot 14 of the link 13 may be eccentric for adjustment, and that the platform 25 may be rotatable on the cradle 28 and locked thereto by a releasable lever. This subject-matter does not appear in the Specification as accepted.
Patent GB-1294803-A (GB)
Title: Fuel supply systems for combustion engines
Inventor: SHARPE CECIL HOWARD
IPC: B01D29/00
Filed: 1971-07-15
Abstract: 1294803 Gas turbine engine fuel systems GENERAL MOTORS CORP 15 July 1971 [21 Oct 1970] 33272/71 Addition to 1233845 Heading F1G [Also in Divisions B1 B2 F4] A fuel supply system for a combustion engine, having at least one fuel delivery nozzle with small and large ports, comprises a source of pressurized fuel connected to at least one inlet of a separator device, the device having a first outlet for the delivery of uncontaminated fuel to the ports; a regulator mechanism for controlling the delivery to the small ports and two further outlets, connected to a common supply line, for the delivery of contaminated fuel to the large ports. Fig.5 shows a gas turbine engine fuel system in which a pump 6 feeds fuel to the tangential inlet 32 of a centrifugal separator 70 which separates contaminents from the fuel. Clean fuel leaves the separator 70 via a filter 15 and a central outlet 18 and passes to the tangential inlet 32 of a second centrifugal separator 7 while contaminated fuel leaves via a tangential outlet 24 at the periphery of the separator. A second tangential outlet 36 is provided adjacent the filter 15 to remove fine or light contaminants which would tend to clog the filter. Both outlets 24,36 discharge via a restrictor 72 and a line 22 to the large ports of burner nozzles. The central outlet 18 of the separator 7 delivers via a fuel control 8 to the small ports of the burner nozzles, while the other outlets 24,36 of the separator 7 deliver via the line 22 to the large ports. At low rates of flow all the fuel entering the separator 7 has passed through the smaller separator 70 and is therefore already clean. At high rates of flow, a valve 74 is opened by the pressure drop across it to allow untreated fuel to pass directly to the separator 7. If the filter 15 of the separator 7 becomes clogged, a valve 76 opens to by-pass this separator. In a modification, Fig.4 (not shown), the separator 70 and the by-pass valves 74, 76 are omitted, and the separator 7 has a second tangential inlet (62) which is supplied through a valve (63) which opens only at high rates of flow into the separator. The filter 15 comprises a screen 42, Fig.6, wrapped around end members 51,54 which are connected by a core 46 having cylindrical end portions 47,48 joined by three posts 50. The screen 42 is supported by a helical coil 44. To reduce turbulence inside the screen 42, the coil 44 is handed so that it approaches the outlet end of the screen in the direction of rotation around the axis corresponding to the direction of swirl of the fuel in the separator.
Patent GB-905916-A (GB)
Title: Improvements in or relating to tufting machines and methods of tufting
IPC: D05C15/30
Filed: 1959-10-02
Abstract: 905,916. Tufting-machines. CABIN CRAFTS Inc. Oct. 2, 1959 [Oct. 3, 1958], No. 33475/59. Class 112. [Also in Group IX] The needle bar of a tufting-machine is shiftable transversely to the direction of fabric feed to produce a pattern on that fabric. The needles N, which may each be threaded with a yarn of a different character, e.g. colour or thickness, are mounted on a needle-bar NB reciprocated by rods 10, each rod having a foot-plate 16 slidably engaged with a plate 18, bolted to the needlebar, to permit lateral movement between the bar and the rods. A collar 24c on one end of the bar embraces a post 26 connecting the two arms of a slide bracket 30. The bracket 30 is adjustably secured, by screws 36 and a micrometer bolt 42, to one end of a slide-beam 40 which can be reciprocated in a housing 50 by the co-operation of a pattern control cam 60 with follower rollers 47, 49 mounted on the slide beam. In operation, the cam is preferably driven from the motor driving the stitch-forming and feeding means of the machine so that the needle-bar is shifted laterally when the needle is withdrawn from the fabric. The loopers mounted below the fabric may be provided with cutters to produce cut pile loops.
Patent GB-175119-A (GB)
Title: Musical instruments and keyboards therefor
IPC: G10C3/12
Filed: 1920-11-27
Abstract: 175,119. Hill, C. S. Nov. 27, 1920. Musical scales; keyboards. - Musical instruments are constructed with a scale having sixteen sounds to the octave, the vibration numbers of which are in the. proportion of 16, 17, 18, 19 - - 30, 31. A keyboard for such an instrument consists of seven white and nine black keys as shown..
Patent GB-354646-A (GB)
Title: Improvements in or relating to the manufacture of gloves
IPC: A41D19/02
Filed: 1930-11-08
Abstract: 354,646. Gloves. JEFFERIES, W. L., Fontaineville, Westbury, Wiltshire. Nov. 8, 1930, No. 33727. [Class 141.] A groove is made without quirks or fourchettes from a onepiece trank with the exception of one small piece which is formed from a part of the trank otherwise cut to waste and forming part of a finger. The trank is cut as shown and when the seaming is to be effected, the parts j, k are folded about the dotted lines, the part m is folded to form the thumb, the parts s, s, t, t, u, u are folded to form the first, second, and little fingers, and the part n is detached and assembled under the part d to form the third finger, the tongues of the parts f, g, h, n formed by slits o, p, q being seamed into position during the above steps.
Patent GB-372805-A (GB)
Title: Process for distilling coals
IPC: C10B55/00
Filed: 1930-11-11
Abstract: 372,805. Distilling powdered coal ; fuel. TRENT, W. E., 17, Battery Place, New York, U.S.A. Nov. 11, 1930, No. 33943. [Classes 50 and 55 (i).] Finely comminuted coal or the like is fed through a pipe 10 to a burner 7 to which heated air is supplied from a fan 4 through a heated passage 3 and pipe 6, partial combustion of the fuel taking place in a chamber 2, so that sufficient heat is generated to distil the fuel, the carbonized particles being carried through a conduit 11 to a separator 12. The gases carrying the lighter particles and forming a composite fuel pass out through a pipe 14 to a boiler for heating purposes, and the heavier particles settle in the lower part 15 of the separator and are withdrawn through a pipe 16. A temperature of 500-1500‹ F. is maintained in the chamber 2, and an air velocity of 500 feet per min. may be employed. In a modified process the powdered coal is showered into an upwardly moving stream of gas.
Patent GB-618842-A (GB)
Title: Improvements in retaining rings
IPC: F16B21/18
Filed: 1946-11-15
Abstract: 618,842. Circlips. WALDES KOH-I-NOOR, Inc. Nov. 15, 1946, No. 34000. Convention date, Nov. 8, 1944. [Class 89 (ii)] A circlip having eccentric inner and outer edges and inwardly or outwardly extending lugs at the free ends, according to whether the clip is for external or internal use is bowed laterally as by bending on a cylindrical mandril so that the points 24 of maximum bowing are midway between the free ends 12 and the point 22 of maximum thickness. The part 19 to be located overhangs the edge of the groove for the clip and the amount of bowing is sufficient to allow pressure against the edges 17, 18 in spite of the manufacturing tolerances in the various parts.
Patent GB-1235498-A (GB)
Title: Improvements in coin-freed vending machines
Inventor: SURRY EDWIN ALFRED
IPC: G07F5/04
Filed: 1968-07-17
Abstract: 1,235,498. Coin-freed apparatus. E. A. SURRY, and P. E. SURRY. 17 July, 1968, No. 34011/68. Addition to 1,141,561. Heading G4V. A coin-freed vending machine as described in parent Specification but modified in being particularly intended for operation by two coins and including a coin rejector operable independently of the delivery drawer by withdrawing the coin guide 112 against the action of a spring 27 to allow free passage of a coin through the slot in the drawer. The coin guide 112 is adjustable laterally of a channel piece 23 having upturned edges 23a, 23b by a screw and slot 24, 21. The guide may be fixed in one of a plurality of different positions relative to the pawl plate 9 corresponding to different coin denominations. The edge 23b has an operating handle 23e at one end and a plate portion 23c mounted at the other end and connected by the spring 27 to a fixed support plate 26. An edge 26a of the plate 26 guides the edge 23b for movement of the channel piece 23 and guide 112 away from and toward the plate 26 under the influence of the spring 27. A first inserted coin is supported on edge between edges 23a, 23b. A second inserted coin is deflected from the edge of the first coin and is supported between the bar 112 and the edge of the plate 9 for releasing the drawer. To return the coins instead of operating the drawer, handle 23e is pulled to withdraw the edge 23a and bar 112 from abutment with the plate 26 so that the coins fall through the drawer slot to a reject shoot and tray (not shown). An adjustable lever (Fig. 2, not shown) may be provided for preventing oversize second coins from reaching a drawer freeing position, by means of a lug extending into the coin path.
Patent GB-985339-A (GB)
Title: Improvements relating to cathode structures
Inventor: LUDLOW JOHN HEYWOOD
IPC: H01J23/04
Filed: 1962-09-05
Abstract: 985,339. Cathode constructions. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 29, 1963 [Sept. 5, 1962], No. 34043/62. Heading H1D. [Also in Division H5] A thermionic cathode-e.g. for the electron gun of a klystron tube-has a concave electron emissive front face; a zone of reduced thickness adjacent its peripheral support to reduce heat conduction thereto; and a radiant heater disposed adjacent the outer zone of the rear face such that the central zone of the cathode is heated by conduction from the outer zone and only to a small extent by direct radiation, whereby to increase the uniformity of temperature over the cathode surface. The heater of the cathode 1, with emissive surface 2, is constituted by four resistance wires 13 connected in spiral fashion between inner terminals 5 on a conductive disc 3, which is free to rotate about its axis on an insulating pin 4 to allow for expansion, and outer terminals 8, one pair of which is electrically connected to plate 7, supported by stainless steel or molybdenum pillars 12 which constitute one terminal of an A.C. supply, the other supply terminal 11 being connected to the other pair of terminals 8 via plate 6, whereby the current in adjacent wires flows in opposite directions. The cathode is supported by molybdenum ring 15 having tabs 17, 18 projecting into recesses in the peripheral flange 14 of the cathode, and in the beam electrode 16, respectively, the portion 14 of reduced thickness reducing heat conduction therebetween. The cathode is displaced in opposite directions by expansion of ring 15 and of pillars 12, the materials of the latter being chosen such that their effects substantially cancel, minimizing variation of the cathodeanode spacing. Nickel reflectors 19, 20 surround the heater-cathode assembly. The gun, the housing of which may extend into an oil bath for cooling, further includes an axially apertured anode (not shown).
Patent GB-796584-A (GB)
Title: Improvements in or relating to flame-resistant flexible hose assembly
IPC: F16L57/04
Filed: 1955-11-29
Abstract: 796,584. Flexible hoses; hose couplings. RESISTOFLEX CORPORATION. Nov. 29, 1955 [Dec. 1, 1954], No. 34163/55. Classes 99(1) and 99(2). A fire-resistant flexible hose assembly comprises a tube 1 of polytetrafluoroethylene, preferably extruded, surrounded by a flexible, tubular cover 4 of asbestos having an internal diameter greater than the outside diameter of the tube so that a substantial volume of air is enclosed between the cover and tube, and having the exposed surface thereof coated with a fuel and oil resistant flexible material 5 such as silicone rubber or a synthetic rubber, e.g., Buna (Registered Trade Mark). The cover 4 also surrounds and is secured to fittings 3 attached to the ends of the tube 1. As shown, the tube 1 is reinforced by one or more layers 2 of wire braid, preferably stainless steel, and the coating material 5 of the cover 4 is applied around the ends and on the inside of the latter so as to underlie steel bands 8 contracted or crimped to clamp the cover 4 onto the fittings 3. Specifications 777,668 and 796,583 [Group V] are referred to.
Patent GB-367029-A (GB)
Title: Improvements in the joints of pipes of ductile materials
IPC: F16L13/00
Filed: 1930-11-14
Abstract: 367,029. Pipe joints. HERBERT, F. and- STEW ARTS & LLOYDS, Ltd., 41, Oswald Street, Glasgow. Nov. 14, 1930, No. 34380. [Classes 99 (i) and 99 (ii).] A pipe socket is formed by removing a part only of the thickened conical end of the billet from which the pipe is made, and boring the remaining thickened portion D to receive a tapered spigot E. A recess F may be bored at the mouth of the socket to receive lead &c. The pipe may have a lining G of bitumen cement, and a recess H is formed at the base of the socket to receive the lining material.
Patent GB-1163587-A (GB)
Title: Grain refining steel
Inventor: JONES EVAN THOMAS RICHARD
IPC: B22D27/20
Filed: 1966-08-01
Abstract: 1,163,587. Continuous casting; mould-lining materials. FOSECO INTERNATIONAL Ltd. 6 July, 1967 [1 Aug., 1966], No. 34385/66. Heading B3F. [Also in Division C3] Finely divided iron powder is applied to the surface of molten steel during continuous casting and is said to give a chilled equiaxed surface layer on the cast product. It may be sprinkled on the surface of the steel in the mould, applied as a suspension in a mould lubricant such as rapeseed oil, or applied (in water with a polyacrylamide binder) as a paint on the mould wall. The iron powder has a particle size in the range -22+240 B.S.S. mesh and is of high purity, having a melting point between 1500‹ and 1540‹ C.
Patent GB-381775-A (GB)
Title: Improvements in and relating to interlocking devices for securing scaffold tubes andthe like
IPC: E04G7/18
Filed: 1931-12-11
Abstract: 381,775. Clamps. JOHNSTON, W. A., 88, Ellington Road, Hounslow, Middlesex, and LE BAS, E., Dock House, Billiter Street, London. Dec. 11, 1931, No. 34398. Addition to 363,047. [Class 44.] An improvement in the invention of the parent Specification comprises the use of a clamping member s provided with a central screw r adapted to bear upon the projection j of one clamping member and with end projections adapted to engage slots e provided in the arms of the main clamping member. This member may be provided with screws c to position it on a vertical pole.
Patent GB-825251-A (GB)
Title: Improvements in the production of ferrites
IPC: C04B33/32
Filed: 1957-11-05
Abstract: 825,251. Magnetic compositions. BADISCHE ANILIN- & SODA-FABRIK A.G. Nov. 5, 1957 [Nov. 16, 1956], No. 34429/57. Class 38 (2). Magnetic ferrites are made by sintering a mixture of oxides by heat developed by the passage of an electric current through them. The oxides, in a bed of the material to be sintered, are heated until they become conducting, by resistance heating of a conductor embedded in them, the conductor preferably being of iron or other metal whose oxides form the ferrite. The crucible may be an iron tube through which is passed a gas such as nitrogen, oxygen, a mixture of the two or carbon dioxide to create a desired atmosphere. To produce MnZn ferrite, powdered Fe 3 O 4 , MnO 2  and ZnO in an iron trough are heated at 1300- 1400‹ C. by the passage of A.C. through two iron strips embedded in them. The unconverted powdered oxides are scraped from the sintered block which after cooling to 1000‹ C. is quenched, broken up, powdered, compressed into cores and resintered. NiZn, MgZn, Mn, Ba, Sr, Co ferrite may also be made by this method. Specification 786,477 is referred to.
Patent GB-1190523-A (GB)
Title: Insulated Gate Semiconductor Devices
IPC: H01L23/29
Filed: 1968-07-19
Abstract: 1,190,523. Insulated gate field effect transistors. R.C.A. CORPORATION. 19 July, 1968 [2 Aug., 1967], No. 34526/68. Heading H1K. At an intermediate stage in the manufacture of an IGFET the gate insulation is bombarded with ions of an inert gas. A typical device is made by aperturing a thermally grown oxide layer on an 18-22 ohm cm. P-type silicon wafer, forming a phosphosilicate glass on the exposed areas by heating in oxygen and phosphorus oxychloride and further heating to form phosphorus-diffused N-type source and drain regions. After completely removing the oxide and regrowing it to a thickness of 600Š by heating first in steam and then in dry oxygen, a 900Š glass layer is deposited by gaseous reaction of trimethylphosphate and tetraethyl orthosilicate in a flow of argon. Nickel is electroless plated on areas of the source and drain exposed by etching, sintered, and then reinforced by further plating. The gate insulation is next ion bombarded for 20 minutes in a 20kV discharge through argon at a pressure of 50Á of mercury. After depositing aluminium and etching to form the gate electrode and source and drain extensions over the insulation the device is heated at 340‹ C. for 5 minutes in hydrogen to form the inversion layer, and leads attached by ultrasonic or thermo-compression bonding. Use of silicon dioxide or nitride alone as gate insulation is also contemplated. The effect of varying ion bombardment treatments on the electrical properties of the transistor are discussed at length.