baber/WOPTO huggingface dataset:
Patent GB-676876-A (GB)
Title: Improvements in or relating to pilot-valve-controlled relief valves
IPC: F16K17/10
Filed: 1949-04-16
Abstract: 676,876. Fluid-pressure servomotor-control systems; fluid-actuated valves. CURRAN, J. R. April 16, 1949 [April 19, 1948], No. 10256/49. Class 135. A pilot valve controlled relief valve for a tank comprises a pair of opposed diaphragm chambers in one of which a regulated pressure is maintained by a spring control means whilst the other communicates with the tank pressure, so that if the latter exceeds the regulated pressure the diaphragms move and relieve the spring control to cause rapid movement of a member connecting the diaphragms which then operates the pilot valve to operate the relief valve. Pressure in a chamber 90 acts on a diaphragm 13 connected by a shaft 18 to a diaphragm 12 acted on by air pressure supplied through the conduit 80 and pressure regulating valve 53 to maintain a pressure behind the diaphragm 12 equal to the pressure at which the chamber 90 is to be relieved. Excessive pressure in chamber 90 moves the diaphragm 13 and shaft 18 downwards so that a lever 63, pivoted to the shaft at 65 and to the valve casing through a link at 62, relieves the force of adjustable springs 37, 38 acting on a diaphragm 29 of a pressure relief valve 33, 52 seating on the regulating valve. The pressure behind the diaphragm 12 is thus relieved so that the shaft 18 moves more quickly downwards and a spring- loaded abutment 67 carried by the lever 63 moves a pilot valve 70 to close the air supply conduit 86 leading to a diaphragm chamber 85 and open the chamber to atmosphere to allow the spring 88 to open the valve 89 and relieve the pressure in chamber 90.
Patent GB-1494545-A (GB)
Title: Coated partially laminated carbide cutting tool insert
IPC: B22F7/06
Filed: 1975-03-12
Abstract: 1494545 Laminated carbide cutting tool MINNESOTA MINING & Mfg CO 12 March 1975 [13 March 1974] 10338/75 Heading C7D A laminated carbide cutting tool insert comprises a cemented carbide core having a recess coated with a layer of a cemented carbide containing a major portion of WC, an Fe group binder and at least one carbide of a group IVb or Vb metal to form the rake face and a hard surface coating # 0.025 mm thick on at least the rake face and flanks of the insert. The core may contain 85-98 per cent WC, 2-15 per cent Fe, Co or Ni and up to 13 per cent of carbides of group IVb or Vb metals and the rake face layer may contain 2-34 per cent carbides of group IVb or Vb metals, e.g. the layer may contain 72 per cent WC, 8 per cent TiC, 12 per cent TaC and 8 per cent Co. The hard surface coating is Al 2 O 3  or carbides, borides, nitrides, silicides, of group IVb or Vb metals e.g. TiC, TiN, TiCN, TiB, TaC and TaN. The core and cemented carbide layer on the rake face may be formed either by pressing the cemented carbide powder on to the green core and sintering or by pressing together green layers of the cemented carbides and sintering. The hard surface coating e.g. TiC is deposited by chemical vapour deposition. The edge wall of the core forming the cutting edge may be a layer of a cemented carbide of different composition from the core.
Patent GB-710169-A (GB)
Title: Production of hydrogen peroxide
IPC: C01B15/03
Filed: 1952-04-24
Abstract: <PICT:0710169/III/1> Hydrogen peroxide is produced by hydrolytic decomposition of a solution of persulphuric acid or a salt thereof and distillation of the hydrogen peroxide formed, in a process comprising three directly succeeding stages, namely a first stage in which the solution is passed, preferably upwardly, through a graphite tube, which rapidly transmits heat to it, with a flow velocity of at least 50 c.c. per minute per sq. cm. of the bore, so that the main part of the hydrolysis and the first part of the distillation take place in this stage; a second stage through which the product of the first stage, both liquid and vapour, is passed and in which it remains for a period considerably increased, preferably 3-7 times, compared to that spent in the first stage, so that the main part of the distillation of the hydrogen peroxide takes place; and a third stage in which the product of the second stage, both liquid and vapour, is passed into a fractionating column where residual quantities of hydrogen peroxide are driven off from the liquid by direct heating steam.  In the apparatus shown in Fig. 1. the first stage takes place in a graphite tube 21 which is sealed with barium sulphate formed in situ and an electrolytically deposited coating of lead.  Other sealing materials such as silica and gold are referred to.  The second stage takes place in hard lead tube 28, and both these stages are heated by steam at 0.35 atmospheres. In the third stage, use is made of a distillation column 31, made of hard porcelain, the stages thus being carried out in apparatus of which the conductivity diminishes from the first to the third stage, a preferred feature.  The products of the second stage enter the column by means of a connecting pipe 32 which terminates beneath the surface of 25 m.m.  Raschig rings with which the column is filled.  Steam is blown into the column through pipe 33 and hydrogen peroxide leaves the head of the column through pipe 34 connected to a source of vacuum while the residue leaves the foot of the column through pipe 35.  A temperature of 85-87 DEG C. and a pressure of 50-60 m.m./Hg prevail in the column.ALSO:Graphite tubes are coated by spraying with lead in order to render them impervious.  Gold may also be applied to the sprayed lead coating may have an electrodeposited lead coating thereon.
Patent GB-1533595-A (GB)
Title: Adsorbents and methods for separating hydrocarbon mixture
IPC: B01J20/18
Filed: 1976-03-16
Abstract: 1533595 Decationized faujasite zeolite TORAY INDUSTRIES Inc 16 March 1976 [17 March 1975] 10478/76 Heading C1A [Also in Division C5] A zeolite adsorbent for separating para-isomers from C 8  or C 10  aromatic hydrocarbons comprises a faujasite zeolite which has been prepared by drying and calcining a faujasite zeolite containing ammonium ions in the range of from 2.5 to 25 per cent, based on the total exchangeable cation sites originally present, and which also contains potassium and/or barium ions at residual cation sites. The zeolite may be prepared by ion exchange of the faujasite zeolite with solutions of NH 4 + ions containing K and/or Ba ions, drying at 50 to 250 C. and then calcining at 300 to 700 C.
Patent GB-539213-A (GB)
Title: Apparatus embodying radio receiving apparatus
IPC: H05K11/00
Filed: 1940-06-17
Abstract: 539,213. Wireless receiving sets. CROWLEY, D. J. June 17, 1940, No. 10496. [Class 40 (v)] [Also in Group XXXVI] A wireless receiver combined with a standard lamp has the main part of the set mounted on the base plate 27, the controls mounted on the pedestal above an ashtray 80 while the lamp shade section includes a loudspeaker 96, power pack 98 and rectifier and audio-frequency valves 99, 100. The electrical connection from the set in the base to the elements in the lamp shade are brought out to a set of sockets in an insulating ring 31 which are engageable with corresponding plugs on a ring 33 supported from the pedestal so as to permit ready detachment when the chassis is removed with the base plate for inspection. For this reason also the volume control and on and off switch 44, and the tuning condensers 22 are connected by detachable couplings 50, 42 to the shaft 47 and tube 40 driven by the adjusting rings 81, 57 rotatable on the pedestal. The connection between ring 57 and tubular shaft 40 includes gearing designed to reduce backlash. A wavelength scale 77 is visible through a window 78. The lamp switch 93 is operated by a lever 94 and shaft 95. In a modification, a tone control is mounted in the upper part 92 and is operated by a sleeve rotatable on the upper part of the pedestal.
Patent GB-495569-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B9/58
Filed: 1937-04-13
Abstract: 495,569. Setting devices for photographic cameras. KINGSTON, A. W. April 13, 1937, No. 10519. [Class 98 (i)] A camera comprises an adjustable shutter, lens-diaphragm, and/or lens, and/or filter, and a single control member adapted to set in a single control movement, the shutter and at least one other adjustable part to provide at least two settings for any shutter setting. The lens is mounted on a triangular plate 14 supported at each corner on a rearwardly-projecting pin 15 secured to the front wall 11 of the camera. A spring 17 tends to press the plate into engagement with the shoulder 16 and when in that position the lens is in correct position for taking portraits. When the plate 14 is pressed rearwardly into engagement with the nuts 18, the lens is in correct position for general views. A shaft 19 mounted below the aperture 12 has a radial arm 21 and is rotated by a pointer 20. The lower edge of the plate 14 is flanged as at 23 so that it may be engaged by the rotating arm 21 when it is required to be pressed back against the nuts 18. The shutter comprises a plate 23 pivoted at 24 and having an aperture 25. An operating trigger 26 is pivoted to the plate 23 at 28, movement of the plate being limited by stops 29, 30. The plate and trigger are maintained in the inoperative position by a spring 31. A second plate 32 is pivoted at 33 and connected to the plate 23 by a spring 35, so that in the inoperative position a tongue 34 on the plate 32 rests against the stop 29. Actuation of the trigger moves the plate 23 until the spring 35 moves past the pivot 33, when the plate 32 moves over with snap action and the apertures 12, 25 and 36 register momentarily to make the exposure. Release of the trigger allows the plate 23 to return to the position shown, and when nearly in that position the spring 35 returns the plate 32. To provide a time exposure, an arm 38 on plate 32 engages the shaft 19 when the latter has been turned to a predetermined position. For instantaneous exposures, a groove is formed in the shaft 19 which, when in appropriate position allows the passage of the arm 38. The arm 21 which operates the lens carrier is also used to bring a diaphragm plate 40 in front of the lens to reduce the aperture. A spring 43 presses the plate downward so that a part 44 engages a lens hood 46, and aperture 47 registers with the lens. A smaller aperture 48 may be brought into register by sliding the plate upward by rotation of the arm 21 till it engages the plate. One or more filters may be brought into register with the lens by increasing the sliding movement of the plate 40 and mounting the filters on it. Alternatively, a separate plate carrying the filters may be actuated by another arm mounted on the shaft 19. A plate 49 on the front of the camera is provided with indications to show the correct position of the pointer 20 for the various settings desired. Specification 416,398 is referred to.
Patent GB-128297-A (GB)
Title: Improved Process for Protecting Copper or its Alloys from Attack by Atmospheres or Liquids.
IPC: C23C22/68
Filed: 1917-07-23
Abstract: 128,297. Imperial Trust for the Encouragement of Scientific & Industrial Research, Institute of metals, Bengough, G. D., and Hudson, O. F. July 23, 1917. Coating.-The surfaces of copper or copper alloys are provided with a protective coating by heating the article to a temperature not exceeding 450‹ C. in contact with an oxidizing-medium such as air, or an oxidizing-atmosphere, or a liquid such as a permanganate solution or a solution of a carbonate containing also dissolved air. For example, a brass condenser tube may be heated to 200-400‹ C., and the resulting oxide surface may be improved by a light drawing operation. The oxide may be converted into an oxy-salt by exposure to the atmosphere, or by subjecting the article to the action of water or a saline solution, or a solution of a carbonate into which steam is passed. The oxidation and conversion into oxy-salt may be effected in one operation. In the case of a copper-zinc alloy, the surface may be first enriched in copper by removing some of the zinc bv means of acid or a copper solution.
Patent GB-1368885-A (GB)
Title: Nuclear reactors
IPC: G21C7/107
Filed: 1972-03-07
Abstract: 1368885 Controlling reactors HOCHTEMPERATUK - KERNKRAFTWERK GmbH 7 March 1972 [16 March 1971 24 Nov 1971] 10607/72 Heading G6C  A control rod arranged to be thrust directly into the core of a pebble-bed reactor is externally screw-threaded, a thread on the leading section of the rod having a greater pitch than a thread on an adjacent following length of the rod. In the reactor shown in Fig. 1, a control rod 3 is fixed to a double-acting piston 2 which works in a cylinder 1. Hydraulic or pneumatic fluid applied in the cylinder at the end of the piston 2 remote from the control rod 3 drives the rod into a bulk charge 5 of spherical reaction elements 4. The screw threads on the lower part 7 of the rod have a greater pitch than those on the upper part 6. As the control rod 3 is being thrust into the charge 5, it is caused to rotate as a result of the charge acting on the thread as the rod is advanced, and the reaction elements 4 are thrust aside by the screw threads. The lower part 7 of the rod penetrates the charge 5 selectively easily, the greater pitch thread causing only slight rotation, but as the rod penetrates deeper and resistance becomes greater, the upper part 6 of smaller pitch causes the rotation to increase and thus facilitate penetration. The lower part 7 which is thus rotated more than its own thread would otherwise cause tends to push the deeper elements sideways and upwards so as to loosen the path for the rod. The threads on the leading section may be of infinite pitch, forming a number of ribs extending axially along the section which is otherwise of circular cross-section. Alternatively, the leading section may be of elliptical or polygonal cross-section, the ends of the elliptical section or the corners of the polygonal section forming the ribs.
Patent GB-1263322-A (GB)
Title: Integrated circuit biasing arrangements
IPC: H03F3/347
Filed: 1969-02-28
Abstract: 1,263,322. Automatic voltage regulation. R. C. A. CORPORATION. Feb.28, 1969 (Feb.29, 1968], No. 10735/69. Heading G3X. A stabilized control voltage, suitable for supplying operating bias to a direct current coupled amplifier forming part of an integrated circuit of cascaded amplifier stages, is provided by the circuit arrangement shown in which the voltage at output terminals 46, 52 is determined by the voltage at input terminals 42, 46, by the number of transistors 30, 32, 34, 36, by the values of the resistors 44, 48 and by the number of semiconductor diodes 45, 47, 49, 51, the transistors, diodes and resistors being provided in a single integrated circuit whereby the respective diode forward voltage drops and transistor V be  voltages are identical and the ratio of the resistors 44, 48 is invariable. As a result the voltage at output terminals 46, 52 is independent of temperature variations and is equal to 1/N + 2 times the voltage at input terminals 42, 46, where N represents the number of stages of transistor coupling between transistors 30, 32, where the value of resistor 44 is N + 1 times the value of resistor 48 and where the number of diodes in the collector connection is N + 1 times the number in the emitter connection. An arrangement using two transistors, two diodes and equal value resistors is described, Fig. 1 (not shown) and a theoretical analysis is given for this arrangement and for that of Fig. 2. If desired the control voltage may be taken from terminals 42, 52, in which case it is equal to N + 1 / N + 2 times the voltage at input terminals 42, 46. The two transistor arrangement may be used to establish and maintain the operating point of a known amplifier circuit comprising an emittercoupled amplifier stage driving a common collector stage, Fig. 3 (not shown), both the arrangement and amplifier being formed on a single semiconductor body comprising a portion of an integrated circuit chip providing a multi-stage direct coupled amplifier.
Patent GB-852735-A (GB)
Title: Manufacture of 1-aminoindanes
Filed: 1957-04-02
Abstract: The invention comprises 1-aminoindanes not further substituted in the 5-membered ring but containing in the benzene ring (preferably in the 5-position) an alkoxy group of more than 2 carbon atoms, and their acid addition salts, and the preparation thereof by catalytic hydrogenation of the oxime or an oxime ether of a correspondingly substituted indanone-1, in an organic solvent.  The products have a dilatation effect on the coronary blood vessels.  5-Alkoxyindanone-1 oximes are prepared by the action of hydroxylamine hydrochloride on 5-alkoxyindanones-1.  5-Alkoxyindanone-1-oxime ethers are prepared by dialkylation of 5-hydroxyindanone-1-oxime.  5-Hydroxy-, 5-butoxy- and 5-hexyloxy-indanone-1 are prepared by cyclizing the corresponding m-substituted hydrocinnamic acids, e.g. by means of polyphosphoric acid.  The 5-alkoxy compounds may also be prepared by etherifying the 5- hydroxy compound.
Patent GB-1447632-A (GB)
Title: Electric switches
IPC: H01H15/00
Filed: 1973-03-06
Abstract: 1447632 Mechanical switches ERG INDUSTRIAL CORP Ltd 25 Feb 1974 [6 March 1973] 10811/73 Addition to 1363652 Heading H1N The slider switch of the main patent is modified to give a better "feel" by providing a detent arrangement comprising a groove for each position of the slider, the grooves being spaced along a longitudinal inside surface of the housing, a detent member 30 and spring means 32 within a channel 31 in slider 18-1. Preferably the grooves are formed by ridges 24 on both the side walls 16 and two balls 30 are provided in a cylindrical bore 31, as shown. The blade moving contacts of the main patent Specification are replaced by a rigid contact bridge 25 urged by a separate spring 29. In a modification (Figs. 3 and 4, not shown) a fixed rod (34) passes longitudinally through the operating slider to prevent twisting thereof.
Patent GB-899879-A (GB)
Title: Improvements in or relating to space-charge wave tubes
IPC: H01J23/24
Filed: 1959-03-31
Abstract: 899,879. Space-charge-wave tubes. SIEMENS & HALSKE A.G. March 31, 1959 [March 31, 1958], No. 10851/59. Class 39(1). A space-charge-wave tube has means such as cathode 1 and enclosing magnet 2 for generating an annular beam, containing electrons moving in a helical path, which passes between coaxial conductors 7, 8 shaped to include a longitudinally extending waveguide 13, 14. A potential difference between conductors 7, 8 maintains the rotating beam in an equilibrium orbit and the waveguide is excited in a fast mode having an electric field component tangential to this orbit; it is stated that forward or backwave space harmonics of the space-charge wave (but not the fundamental) will interact with the waveguide mode to impart energy to it. Although the waveguide mode is in general fast, a small delay may be used. The gaps in the waveguide may be gridded. Tuning may be electronic (fine) or by altering the magnet field (coarse).
Patent GB-1145561-A (GB)
Title: Process and apparatus for fermentation
IPC: C12M1/06
Filed: 1966-03-11
Abstract: 1,145,561. Mixing and aerating apparatus. R. PICARD. 11 March, 1966, No. 10881/66. Heading B1C. [Also in Division C6] Air or oxygen supplied through an inlet 12 is dissolved in fermentation liquor in a chamber 20, 30, Fig. 2, provided with baffles 21 and rotating agitators 32, and the liquor containing the dissolved ,gas is passed through tubes D1, D2, D3, Fig. 1, constricted by perforated plates E, a back pressure being maintained by the constrictions. The lengths of the tubes can be chosen to correspond to the time appropriate for fermentation.
Patent GB-326376-A (GB)
Title: Improvements in india-rubber springs
IPC: F16F1/40
Filed: 1929-04-09
Abstract: 326,376. Spencer, A. April 9, 1929. Indiarubber springs. - An indiarubber compression spring used as buffing and draw-springs on railwav &c. vehicles consists of a number of rubber bars moulded on to a metal plate having plowed recesses and slots to receive them. In the construction shown, a rectangular metal plate 1 with a central hole 2, through which the draw-bar enters, supports a number of indiarubber bars 3, 4, of rectangular cross-section, spaced equally apart, and moulded to both sides of the plate. The bars on opposite sides all connected by indiarubber extending through slots formed in the plate. A number of these springs may be arranged to form a column, with metal dividing plates between them. The bars may be continuous or interrupted and may terminate at different distances from the edges of the plate. Cross-bars may be provided extending in any desired direction.
Patent GB-1153141-A (GB)
Title: Alternating Current Electric Power Control
Inventor: HUNTER COLIN EDWARD
IPC: G05F1/455
Filed: 1965-03-16
Abstract: 1,153,141. Control of A.C. loads. NATIONAL RESEARCH DEVELOPMENT CORP. 15 June, 1966 [16 March, 1965], No. 11061/65. Heading H2H. [Also in Division G3] A system for firing a thyristor connected in an A.C. circuit comprises a generator producing a first A.C. square waveform having a constant phase difference compared with the A.C. supply, means for generating a monotonic waveform increasing and decreasing progressively in alternate half-cycles of the first square waveform, a first adding means responsive to the square waveform and the monotonic waveform, a voltage source, and a comparing device connected to the first adding means and the voltage source which is arranged to fire the thyristor. The voltage source may be derived from the output of a second adding means responsive to a second A.C. square waveform of equal amplitude an antiphase to the first square waveform and the monotonic waveform; or a second antiphase square waveform of twice the amplitude of the first square waveform, a source of D.C., or a voltage responsive to an error signal derived from the load energized by the A.C. supply. In a system controlling A.C. power in one or more loads 33, 33a a square wave generator 13 produces outputs 21, 23 in a phase opposition and a function generator 15 produces triangular or sinusoidal waves, displaced 90 degrees from the supply, both generators being supplied from a phase reference unit 17. The outputs 21, 23 together with the generator 15 output are fed to adder units 25, 27, the summations from which are supplied through conductors 29, 31, across one or more potentiometers 37, 37a, each controlling a firing unit 39, 39a which produces at each sharp transistion, a pulse output to fire reverse parallel or series connected thyristors 35, 35a. The circuit may form part of an automatic speed control system, whereby the output of a tacho-generator, a variable reference and conductor 31 are summed at the input to the firing unit to control the speed of an electric motor. The square wave generator (13) (Fig. 4, not shown) may comprise a mains transformer having a secondary winding (L1) supplying through a phase retarding network (R1), (C1) and diodes (Dl), (D2) and NPN transistor (J1) forming an over-driven amplifier providing a square wave output which is phase split in the transistor (J2) stage to give a phase displaced square wave output across the resistors (R5), (R6) to which are added sinusoidal waves in the secondary windings (L2), (L3), the outputs from which are phase displaced by CR circuits and fed through amplifiers (A1), (A2) to conductors 29, 31. The firing unit 39 comprises transistors (J3), (J4), Fig. 5 (not shown), arranged with their emitters earthed, fed through reverse series diodes (D3), (D4). A direction change of input voltage switches (J4) causing a pulse output from trans. former (T2) to the thyristor gate electrodes.