baber/WOPTO huggingface dataset:
Patent GB-404020-A (GB)
Title: Improvements in or relating to television
IPC: H04N5/208
Filed: 1932-07-06
Abstract: 404,020. Television. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Hayes, Middlesex, and BROWNE, C. 0., 29, Monk's Drive, West Acton, London. July 6, 1932, No. 19156. [Class 40 (iii).] To compensate for differences in mean density of a kinematograph film, the size of a fixed scanning aperture or the intensity of illumination is controlled so that the average values of the direct and alternating components of the picture signals may be kept constant. At a transmitter the light-source 3 and amplifier 8 operate at their maxima, and the width of the stationary aperture 6, which scans the film 1 in co-operation with the mirror drum 4, is varied either manually or automatically by movement of the shutter 9. To this end portion of the picture current, after rectification at 13, may be applied to an obturating device which comprises a moving-coil galvanometer with a vane 17, Fig. 2 counterbalanced by a weight 19 and shaped so as to vary the width of the aperture 6. A potentiometer 15, Fig. 1, for adjusting the zero and a resistance 16 for adjusting the sensitivity are provided. The natural frequency of the system is about 8 c. /sec. Alternatively a moving-coil loud-speaker may control the shutter, the diaphragm providing a damping effect ; or a light-valve comprising a current-carrying ribbon in a magnetic field may be used. Two sides of the rectangular aperture may be thus controlled, one in accordance with the amplitude of the alternating component and the other in accordance with the peak value of the illumination. Or the size of the aperture may be controlled by an auxiliary cell illuminated by the total light from the picture or by a pencil of light passing through a marginal strip of the film. The rectifier may be biassed so that the device only comes into operation when the signal-amplitude passes a predetermined limit. At the receiver a similar arrangement may be adopted ; or the intensity of the light-source or an obturator controlling the light-beam may be varied. The alternating component of the signals may be controlled as above and the direct component of the signals compensated by means of an auxiliary beam.
Patent GB-186738-A (GB)
Title: Desulphurising petroleum and similar oil
IPC: C10G27/12
Filed: 1921-07-18
Abstract: Petroleum and similar oils are desulphurized by vaporizing the oil to convert the sulphur into sulphuretted hydrogen, and then treating the vapours with water or steam and a gaseous dissociating-agent such as chlorine or sulphur-dioxide, preferably under the action of a magnetic field.  The vaporized oil, steam, and dissociating-agent are led into a chamber packed with fire-brick, pumice, &c., and surrounded by an electrical coil. The chamber is heated to 300-400 DEG  C.  In an example, the oil is vaporized and the contained volume of sulphuretted-hydrogen is determined.  An equal volume of chlorine or sulphur-dioxide and five volumes of steam at 240 DEG  F. are then admitted.
Patent GB-886233-A (GB)
Title: Improvements relating to glass melting by electric heating
Inventor: GELL PHILIP ANTHONY MAUNSELL
IPC: C03B5/027
Filed: 1957-06-20
Abstract: 886,233. Electric glass furnaces. ELEMELT Ltd. June 20, 1958 [June 20, 1957], No. 19403/57. Class 39(3) In heating glass and other vitreous material in which glass melted or refined in a furnace chamber passes to a feeder chamber from which glass is withdrawn for working, the glass flows from the furnace to the feeder chamber through a feeder duct in which the glass is heated uniformly over its transverse cross-section by A.C. between electrodes spaced longtitudinally in the glass and supplying current over the cross-section of the duct over a sufficiently large area to promote uniform heating over that area. The electrodes border the bottom and side walls of the duct and are constructed to allow easy passage of a substantial part of the molten glass flow; as shown, they comprise a mesh 23 of wires or strips of molybdenum supported by vertical end rods 18 passing through the top or bottom of the feeder duct 11 and attached to current supply terminals. The glass may fill the duct wholly or partly and in the latter case the top of the duct is heated by fuel burners extending through openings 25 in the side walls of the duct. The rods 18 may be of nickel chromium alloy, of molybdenum sheathed with platinum or with ceramic to prevent oxidation above the glass level .When the rods 18 extend through the bottom of the duct, they may be supported as in Specification 664,121 and may have external fins cooled by an air blast. When the rods extend through the roof of the duct, they may be internally water-cooled. in a modification, the electrode comprises narrowly spaced vertical molybdenum rods threaded into a bar extending across the base of the feeder duct and firmly attached to end rods 18 extending through the roof of the duct. In another modification, the electrode comprises a vertical plate of a height equal to about 40% of the depth of the glass and supported adjacent the base of the duct by vertical end plates adjacent the side of the duct and supported through the roof the duct by rods internally water-cooled. The viscosity of the glass in the furnace chamber is preferably maintained at 1À5 X 10<SP>2</SP> poises and in the feeder chamber at 10<SP>3</SP> poises. The glass in the furnace and feeder chambers is heated by passing current therethrough or externally e.g. by fuel burners, and one furnace chamber may be connected to several feeder chambers. One or more transverse electrodes may be mounted between the electrodes at the inlet and outlet ends of the feeder duct and may be connected to supply greater current flow along parts of the duct to exercise greater control over the rate of cooling or heating of the glass passing through the duct. The current is supplied from separate transformers or from secondary windings of a single transformer with means for adjusting the voltages.
Patent GB-314949-A (GB)
Title: Improvements in means for spreading cut tobacco in cigarette making machines
IPC: A24C5/39
Filed: 1929-06-24
Abstract: 314,949. Universelle Cigarettenmaschinen-Fabrik J. C. M³ller & Co. July 5, 1928, [Convention date]. Cigarette-making machines.-In means for spreading out tobacco, of the kind in which a fleece of tobacco is formed across a moving sieve band subjected to suction action, the release of the tobacco fleece from the band at the point of delivery is facilitated by a gradual reduction of the suction action obtained by tapering off the suction chamber or causing it to recede from the band. Fig. 2 shows a sieve band 5 passing over pulleys 34, 35, 36 and subjected to the action of a suction chamber 39, which is tapered to a point at 51 where the tobacco is delivered on to a band 19 leading to a grooved conveyer 23. The tobacco is fed from a hopper 1 and is straightened by an air jet 14 and reduced in thickness by a brush 16. In a modification, the tobacco passes over a sieve band formed as a rotary drum subjected to internal suction, which is reduced at the point of delivering by an internal segmental section tapering towards the periphery of the drum. In a third form, similar to that shown in Fig. 2, the lower side of the suction chamber 39 is inclined upwardly towards the delivery end.
Patent GB-1104424-A (GB)
Title: Liquid flush control valves and pistons therefor
IPC: E03D3/02
Filed: 1965-05-07
Abstract: 1,104,424. Valves. SLOAN VALVE CO. 7 May, 1965 [13 Aug., 1964], No. 19472/65. Heading F2V. A flush control valve includes a differential piston 20 held on its seat 11 by the pressure at the inlet 6, a passage 19 extending through the piston and having a maximum dimension which is greater than the transverse dimension of an elongated liquid-admission gap between a sediment baffle 40 and the piston and a crosssection which is smaller than that of the gap, and a relief valve 53 which may be manually opened by a handle 60 to cause the piston to become unseated. The liquid admission gap may have a transverse dimension of 0À005 inches formed by the gaps between two axially spaced circumferential series of ribs to which the baffle is press fitted. A further series of ribs on a press-fitted insert 25 provide a gap of 0À0235 inches through which the liquid may enter a chamber 44 above the piston after flowing through an orifice of 0À021 inches diameter in the passage 19. When the handle 60 is pressed inwardly against a spring 64 to tilt a stem 51, the liquid in the chamber 44 escapes between the valve 53 and its seat 31 to allow the piston to be lifted by the inlet pressure. The valve is closed by a spring 56 and pressure builds up above the piston 20 to re-engage it with its seat. If the handle 60 is still held in the inward position the stem 51 is lifted freely inside the relief valve so that the latter does not open. A seal 65 retained by a projection 66 is provided for the handle 60 and a reinforced rubber or leather packing ring engages the piston skirt. The piston assembly may be of plastics material and the remaining parts of the valve of brass.
Patent GB-874883-A (GB)
Title: Electric current generators
Inventor: PURDEN ROBERT HESKETH
IPC: B62J6/06
Filed: 1959-06-08
Abstract: 874,883. Machines with permanent magnets. LUCAS (INDUSTRIES) Ltd., JOSEPH. June 3, 1960 [June 8, 1959], No. 19473/59. Class 35. [Also in Group XXXVI] A lead is fastened to a tyre-driven cycle dynamo by a spring-loaded terminal comprising a push-button 12 arranged for axial movement in a hollow electrically insulating member 9 at one end of the dynamo. Member 9 and button 12 have lateral holes 11 and 18 which become aligned for insertion of the lead when the button is depressed. A spring 14 biases the button outwardly to retain the lead, which is connected through spring 14 and button 12 to stator winding 4.
Patent GB-1191450-A (GB)
Title: Thermally Insulating Containers.
IPC: B01L7/04
Filed: 1969-04-16
Abstract: 1,191,450. Thermoelectric devices. SIEMENS A.G. 16 April, 1969 [17 April, 1968], No. 19525/69. Heading H1K. [Also in Division F4] A thermally-insulated container is used for storing blood at a temperature which is maintained by Peltier devices, the devices being powered by dry batteries or accumulators contained in a compartment of the container. As illustrated, the container has metal inner and outer walls 1 and 2 separated by polyurethane foam 3. Peltier devices 4 and 5 contact the wall 1 and metal blocks 4<SP>1</SP> and 51 which in turn contact the outer wall 2. The devices 4 and 5 are connected through a reversing switch 17 and sleeves 14 to the pins 13 of removable battery containers 7 and 8. Contacts 16 are broken by a projection 15 on the container 8 so that the container may be omitted if desired. The walls 6 and 9 of the battery compartment are of plastics material. Blood is stored in bottles in the container whose temperature may be regulated by a temperaturesensitive switch (not shown). Should ambient temperature fall below the desired blood temperature, the reversing switch may be operated so that the blood is heated.
Patent GB-934567-A (GB)
Title: Production of high strength fused silica fibers
IPC: C03B37/025
Filed: 1962-05-21
Abstract: 934,567. Coated silver fibres. GENERAL ELECTRIC CO. May 21, 1962 [May 25, 1961], No. 19532/62. Class 56. A high strength fused silica fibre with a maximum diameter of 50 microns is provided with a thin coating of pyrolytic graphite on its surface. Preferably the thickness of the coating does not exceed 1000 Angstroms. A fused silica fibre 10 of diameter 11 is passed through a heating zone 15 supplied by gas oxygen flames from a heating ring 20 and drawn down to a diameter 12. Immediately below the ring 20, the fibre 10 passes through a fused silica cylinder 25 heated by a surrounding resistance furnace 26 and through which a carbonaceous gas is directed through the lower end so that, as the heated fibre 10 meets the heated gas, the carbonaceous gas is thermally dissociated and carbon deposited as a thin coating.
Patent GB-498687-A (GB)
Title: Transformation of relaxation oscillations
IPC: H03K6/02
Filed: 1937-07-15
Abstract: 498,687. Relaxation oscillators; valve generating circuits. RADIOAKT. - GES. D. S. LOEWE. July 15, 1937, Nos. 19628 and 19629. Convention dates, July 16, 1936 and July 30, 1936. Addition to 483,667. [Class 40 (v)] A valve 1, Fig. 2, amplifying a relaxation oscillation, has in its output circuit a condenser-resistance combination 11, 6 to integrate the oscillation, so that the transformer primary winding 7a is traversed by the relaxation oscillation and its integral, giving a pure relaxation oscillation potential across the secondary winding 7b. The elements 6, 11 may form part of the smoothing circuit of the anode supply, Fig. 3 (not shown). An additional correction may be provided by biassing the valve 1 to operate near the bottom bend of its characteristic. Over-correction may be compensated by providing a differentiating circuit 8, 10, Fig. 4, in the lead to the transformer. Specification 491,270 is referred to.
Patent GB-910623-A (GB)
Title: Apparatus for reducing smoke emission from elevated flare stacks
IPC: F23L7/00
Filed: 1960-06-03
Abstract: 910,623. Gas burners. BRITISH PETROLEUM CO. Ltd., and WILLIAMS, C. A. H. May 18, 1961 [June 3, 1960], No. 19677/60. Class 75 (1). An apparatus for mounting at the top of an elevated flare stack and adapted to mix combustible gases and air so that the gases burn without producing smoke comprises two coaxial pipes 1, 2 of different diameters arranged endto-end to provide an annular space 3 for the entrance of air and a centrifugal nozzle 12 adapted to spray water into the combustible gases passing upwardly through the pipes 1, 2. The water spray causes turbulence of the gases and thorough mixing with the air induced through the space 3. The spray nozzle 12 is surrounded by a cowl 14 which catches unatomized water and directs it to an annular tray 6 drained by a line 7. The water is supplied to the nozzle from a tank by a pump. The tubes 1, 2 are enclosed in wind deflectors adapted to deflect air to the leeward side of the stack and comprising spaced metal slats 11 having tapered upper ends which are curved inwardly. The apparatus may be made of mild steel and is preferably tipped with stainless steel. A refractory lining may be provided. The flow of water may be correlated with the flow of gases. A gas pilot line and a flame propagation tube containing a sparking-plug project into the upper tube 1. Specification 795,664 is referred to.
Patent GB-1371015-A (GB)
Title: Fabrication of foundry casting moulds and cores
IPC: B22C1/08
Filed: 1973-04-25
Abstract: 1371015 Moulding foundry moulds and cores RAYTHEON CO 25 April 1973 [15 May 1972] 19701/73 Heading B5A A method of making a plaster foundry mould or core comprises the steps of (a) preparing a mould having a cavity of the desired dimensions and surface finish, e.g. wood grain (b) spraying with release agent; (c) filling the mould with a conventional gypsum plaster/water mix; (d) allowing the plaster to set and removing moulded plaster mass from the mould; (d) heating the plaster mass by microwave heating until its internal temperature is 300-320‹ F. (i.e. above the calcining temperature of gypsum (e) cooling the plaster mass to below 270‹ F., preferably to 200‹ F.; (f) heating again by microwaves to 300‹ F. The heating steps are stated to prevent crazing and cracking in the product.
Patent GB-679239-A (GB)
Title: Improvements in or relating to thermionic valve amplifiers
IPC: H03F3/28
Filed: 1950-08-08
Abstract: 679,239. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 8, 1950 [Sept. 30, 1949], No. 19756/50. Class 40 (vi). In a circuit comprising a class B amplifier preceded by a D.C. amplifier and in which the supply voltages are obtained from a common source, effects on the output of the class B amplifier due to variations in the voltage supply are neutralized by suitably choosing the values of the resistances of the D.C. amplifier. In the circuit shown, the voltages U1, U2 of the D.C. amplifier and the H.T. voltage Uao of the class B amplifier are derived from a common source and the value of the resistance Ra or the effective resistance between the anode of V2 and earth is so chosen that a change in the supply voltage causing a change #v in the voltage Uao also causes a change 1/Á #v in the voltage Ug. The effective resistance between the anode of the valve V2 and earth may be adjusted by means of a parallel resistor or by applying negative feed-back to the valve (Fig. 3, not shown). The resistances may be such that in addition they compensate for the effects of changes of the supply potential of a further D.C. amplifier G1 connected between the valve V2 and the class B stage.
Patent GB-1006671-A (GB)
Title: Improvements in ignition systems for internal combustion engines
IPC: F02P3/08
Filed: 1962-05-23
Abstract: 1,006,671. Ignition systems. ROBERT BOSCH G.m.b.H. May 23, 1962 [June 9, 1961], No. 19841/62. Heading F1B. A spark ignition system comprises an ignition coil 11, Fig. 1, whose primary 10 is in the discharge circuit of a condenser 25 which is charged through a rectifier 13 from the secondary 14 of a transformer T, the primary coil 16 of which is connected to a battery 15 through a normally conductive semi-conductor 26, e.g. a transistor, which is blocked at intervals in synchronism with the engine to produce charging impulses for the condenser 25, a second rectifier 34 being connected across the condenser 25 or across the primary coil 10. Opening of a switch 30 by an engine driven cam 19 blocks the transistor 26 and produces an impulse in the transformer secondary 14 which charges condenser 25 to about 600 volts, its discharge through the ignition coil primary 10 to produce an ignition voltage in the secondary 12 being controlled by a second engine operated switch 23. A glow discharge tube 32 prevents condenser 25 charging to too high a voltage and the rectifier 34 protects the contacts 23, 24. In Fig. 3 the charge and discharge of the condenser 25 is controlled by a single switch 41 and the discharge circuit of the condenser includes a semi-conductor thyratron 40. Opening of switch 41 blocks transistor 26 to charge the condenser 25 and closing of the switch renders thyratron 40 conductive to discharge condenser 25. The control electrode of the thyratron 46 may be connected to a control condenser 48 which charges while switch 41 is open and discharges to render the thyratron conductive when switch 41 is closed. In a modification, Fig. 4, the thyratron control condenser 48 is charged by impulses produced in a tertiary winding 53 on the transformer T. In Fig. 6, the thyratron is replaced by a second transistor 50 and a rectifier 34a is placed across the coil 10 to protect contacts 41, 42.
Patent GB-239836-A (GB)
Title: Improvements in or relating to apparatus for the periodic delivery of molten glass from a furnace
IPC: C03B7/084
Filed: 1925-08-08
Abstract: 239,836. Naamlooze Vennootschap Internationaal Octrooibureau, (Assignees of Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Sept. 12, 1924, [Convention date]. Delivering molten metal. - A feeder of the reciprocating plunger type has the plunger surrounded by a cylinder provided with ports through which the glass flows from the forehearth to the discharge outlet, the ports being opened and closed in synchronism with the movement of the plunger. Both the plunger and the cylinder are made of metal instead of fireclay. Construction of feeder. The discharge outlet is formed in a metal plate 4 which is mounted in an opening in the floor of the forehearth 1. The plate is made integrally with a cylinder 5 in which a piston 6 fits, a port 18 being formed in the wall of the cylinder on the side away from the furnace. The piston 6 with its rod 7 forms the reciprocating plunger, and it is guided by a cylindrical sleeve 20 the lower end of which surrounds the cylinder 5 and is provided with a port 22 which registers with the port 18. The piston rod 7 is supported by a sleeve 9 on an arm projecting from a vertical rod 8, a bevel wheel 10, screwed on to the rod, enabling the position of the rod relatively to the bush 9 to be adjusted and the distance to which the piston 6 projects into the cylinder 5 to be regulated. The rod 8 is connected to a lever 46 which slides through a bush 49 and is rocked by a cam 48 on the driving- shaft 36. The bush 49 is journaled in a block 51 carried by an inclined rod 53, and the position of the block can be adjusted by a handwheel 54. By moving the block, the length of the stroke of the piston 5 can be altered with altering the distance to which it descends into the cylinder 6. The sleeve 20 is oscillated about its vertical axis by a cam on the driving shaft 36, the angle through which it oscillates being adjusted by means of a lever operated similarly to the lever 46. The oscillation of the sleeve periodically opens and closes the port 18, the adjustment enabling the extent to which the port is opened to be regulated. Thus the device permits a quantity of glass to be admitted periodically to the cylinder 5 from which it is expelled bv the plunger 6, and the controls enable the size of the expelled charge to be regulated. Shears 19 are operated as usual to sever the neck of glass formed below the outlet. Materials for apparatus. Instead of being made of fireclay, the cylinder 5, piston 6, and sleeve 20 are made of refractory metal, such as chrome iron. A suitable allov contains about 15 per cent of chromium and 60 per cent to 85 per cent of iron.
Patent GB-515923-A (GB)
Title: Improvements in hardness testing machines
IPC: G01N3/42
Filed: 1938-07-06
Abstract: 515,923. Testing hardness of materials. SMITH,. R. L. H. July 6, 1938, No. 20052. [Class 106 (ii)] A machine of the penetrator type is provided with means such as milling cutter or grinder for preparing a surface on the specimen to receive the impression. The device is described as applied to a testing machine described in Specification 509,168 in which two anvils 2, 3 are provided for supporting specimens and a swing- ing arm 10 carries an indentor 17 and two microscopes 20, 21 and projecting, lenses. Each microscope may be swung to one limiting position over one of the anvils to project an image of the indentation on to a screen 23; In the present apparatus two milling cutters 39 are mounted on the arm 10 each midway between one microscope and the indentingl mechanism) and in a third position of the arm midway between the extreme limiting positions the cutters are brought down on the specimens to prepare them for indentation when they are not in themselves sufficiently smooth. Each milling tool 39 is held in a chuck on which a cord pulley 40 is mounted. The driving cord 41 is passed around a pulley 43 on the spindle of a motor 42 and led around guide pulleys 44, the pulleys 40 and a guide pulley 45. The chucks are carried on pivoted plungers 38 which are embraced by forks 47 connected by a cross. bar 51 and moved down against the influence of a spring by an eccentric 50 engaging the cross bar. A screw stop 52 limits movement of the milling tools.