baber/WOPTO huggingface dataset:
Patent GB-1020412-A (GB)
Title: Current limiting chokes
Inventor: ELLIS ALEXANDER JAMES
IPC: H01F37/00
Filed: 1964-05-05
Abstract: 1,020,412. Inductors. THORN ELECTRICAL INDUSTRIES Ltd. May 5, 1964, No. 18674/64. Heading H1T. A choke comprises a stack of E-shaped laminations 15 (Fig. 2), an elongated coil having two straight side portions lying in the two slots in the stack and a further stack of laminations 17 joining the outer arms of the E-shaped stack 15 and spaced from the centre arm 29 by an air gap 28. The coil which is supported in the region of its curved ends by formers 21, 22 (Fig. 1, not shown) between which the E-shaped laminations are wedged may be provided with impregnated paper insulation surrounding eachwinding layer 11. The choke may be enclosed within a sheet metal casing 24, 25 which is subsequently filled with resin. A pair of each type of laminations may be punched from a rectangular sheet to limit wastage of material to four rectangular portions 31 (Fig. 3, not shown).
Patent GB-1215090-A (GB)
Title: Gas distribution system
Inventor: CAMPBELL KENNETH
IPC: G05D11/00
Filed: 1968-04-19
Abstract: 1,215,090. Gas distribution systems; controlling burners. NORTH THAMES GAS BOARD. 11 July, 1969 [19 April, 1968], No. 18698/68. Headings F4T and F4X. The flame shape of a number of working burners supplied with gas through a main gas feed pipe 1 is maintained accurately constant by a system wherein the incoming gas is sampled and the result of the sampling, which is in the form of an electrical signal, is used to automatically control the addition of air to the gas at a location upstream of the sampling point. As shown sample gas is drawn off at 3 through a line 4 and is fed to one or other of two aerated bunsen-type burners 12A, 12B according to the gas pressure sensed by a controller 10. The controller is connected through a circuit 16 to a switching device 15 which operates through solenoid closure valves 13A, 13B to direct the sample gas either to burner 12A or to burner 12B. The size of the injectors and the air entrainment apertures of the two burners are different and are such that they are capable of burning gases in two different ranges of pressure which just overlap. Any variations in the characteristics of the gas being sampled is sensed by a thermocouple located in the flame cone of the operative burner. The thermocouple is connected through a circuit 20A or 20B to a recorder controller 22 and a control valve 24 in the air line 5, the air added to the main gas feed pipe 1 at 2 being proportional to the signal from the thermocouple. A purge burner 7 is provided to burn the majority of the sample gas so ensuring a steady flow of gas through the line 4. A flame rectification probe 8 senses the height of the purge burner flame and acts as a safety device shutting down the system if the height falls below a critical value.
Patent GB-1370511-A (GB)
Title: Filtering device with energy dissipation in the attenuated band
Inventor: LECHEVIN R
IPC: H03H7/01
Filed: 1972-04-21
Abstract: 1370511 Band pass filters THOMSON-CSF 21 April 1972 [23 April 1971] 18735/72 Heading H3U In a high frequency band pass filter, energy in the attenuated bands is dissipated in resistors 34, 44, as is any energy reflected due to impedence mismatch. As shown filters F 1 , F 2  have the same transfer function in the band-pass, and are duals of each other, having input and output impedances in the passband equal to twice that of the input and output coaxial cables 33, 43, which are connected to the filters via 1 : 1 transformers 31, 32, 41, 42 each comprising a coaxial cable enveloping a magnetic circuit. Each pair 31, 32; 41, 42 comprises a hybrid transformer, terminals 13, 23 being difference ports. Any power reflected in either direction in the filters F 1 , F 2  is dissipated in resistors 34, 44 of value equal to the coaxial characteristic impedance. Any impedance mismatch at cable 33 thus results in dissipation in resistor 44. The sum ports 14, 15; 24 25 may be interchanged with the respective difference ports 13, 23. Alternatively filter F 2  may be the same as filter F 1 , but having its input and output ports interchanged. Outside the passband, the network may be regarded as an attentuator with frequency dependent attenuation coefficient. The function of each hybrid transformer is such that a signal applied to the difference port 13 results in signals equal in amplitude but opposite in phase at the respective terminals 11, 12 when impedances at all ports are matched. Application of a signal to the sum port results in corresponding, in phase, outputs. Specific component values are given.
Patent GB-315087-A (GB)
Title: Improvements in draw-bars or booms for two-wheeled trailers
IPC: B60D1/50
Filed: 1928-06-28
Abstract: 315,087. Robertson, T. E., (Rouet, C. de). June 28, 1928. Draught bars; draught springs, arrangement and disposition. of.-A draw-bar is so mounted on a trailer that it is free to pivot in a vertical plane at its forward point of support, is free to move vertically at its rearward point of support and to move longitudinally with respect to the trailer a predetermined amount. The draw-bar 15 is free to rock about the rounded edges of the front support 3, 7 and its rear end is tapered or reduced to allow it to move vertically between the supports 4, 10, leaf springs 17 being provided to damp oscillation. The pull on the draw-bar is transmitted to the trailer by means of a spring 19 clamped to the draw-bar 15 by means of a block 19 and bearing upon the transverse member 7. The block 18 comes in contact with the member 8 if the trailer tends to overrun the draw-bar. The draw-bar is confined laterally by spaced members secured to the members 3, 7 and 4, 10 respectively.
Patent GB-1467463-A (GB)
Title: Block copolymer compositions
IPC: C08L53/02
Filed: 1974-04-30
Abstract: 1467463 Block copolymer compositions SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 30 April 1974 [2 May 1973] 18836/74 Heading C3P A composition comprises (a) 100 parts of a block copolymer comprising at least one block A which is a polymer of an alkenyl aromatic hydrocarbon, which polymer block may be partially or completely hydrogenated, and at least one polymer block B which is a polymer of a conjugated diene which has been partially or completely hydrogenated, or a copolymer of ethylene and propylene, e.g. polystyrene-completely hydrogenated polybutadiene-polystyrene, (b) 15 to 200 parts of a polypropylene, (c) 20 to 150 parts of an extending hydrocarbon oil and (2) 5 to 75 parts of a petroleum hydrocarbon wax, e.g. mixtures of various paraffin and microcrystalline waxes. Fillers such as calcium carbonate may also be included.
Patent GB-482563-A (GB)
Title: Process of protecting aluminium and its light alloys by electrolytic deposition
IPC: C25D11/00
Filed: 1937-07-07
Abstract: 482,563. Anodic treatment of aluminium and its light alloys. CHAYBANY, A. G. July 7, 1937, No. 18868. Convention date, July 7,1936. [Class 41] The surface of an article of aluminium or a light alloy thereof is anodically oxidized in a bath consisting of a saturated aqueous solution of an alkali salt of a mineral acid in contact with an excess of said salts in the solid state. Salts used are the acid sulphates or acid phosphates or acid fluosilicates or acid fluoborates of sodium, potassium or ammonium ; or the sodium, potassium or ammonium alums of aluminium, chromium or iron ; or mixtures of these salts, e.g. potassium hydrogen sulphate and (a) potassium alum or (b) potassium fluosilicate. The anodizing may take place in two or more operations and in two or more different baths, e.g. first in a potassium hydrogen sulphate bath and then in a potassium hydrogen fluosilicate bath, or vice versa. The bath may contain an " acidic polishing economizer," e.g. formol, for increasing the permeability of the coating to oils, varnishes, or ethyl or methyl alcohol or acetone for preventing the liquid from remaining in a state of super-saturation.
Patent GB-372994-A (GB)
Title: Improvements in and relating to apparatus for reproducing sound or other record froma film
IPC: G11B15/16
Filed: 1931-06-30
Abstract: 372,994. Feeding webs. BRITTSH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Kellogg, E. W.; 17, South Colonia! Avenue, Mooresto-wn, New Jersey, U.S.A.) June 30, 1931, No. 18896. Convention date, June 30, 1930. [Class 100 (i).] A member carried by a pay-out reel, and normally held in inoperative position by the film thereon, moves radially where released and engages means, separate from the reel, to effect stoppage of the reel. As shown a lever 17, pivoted on a web 16 between two spokes of a reel 8, is provided with a lateral extension 18 passing between two convolutions of the film, and with a projecting pin 19 ; a spring 20 tends to pull the lever radially outwards. A fork 25, pivoted on the frame of the apparatus, is held in either of two extreme positions by a spring 27, and normally engages a contact 28 to complete the circuit of a motor 5, or of relays serving to operate a brake, reverse the motor, &c. The pin 19, while the lever is held by the film, rotates without engaging the fork 25 but, when released so that it may be pulled by the spring 20, it engages and turns the fork so as to break the motor circuit &c. The film mav be rewound from the reel 7 on to the reel 8, the fork being then returned to its former position by engagement with the pin at the beginning of the rewinding. In a modification, the reel may have a hub which is rotatable with respect to the main portion, and is connected to it by a spring causing the hub to make one or more turns after the body of the reel has been brought to rest. The invention is shown as applied to a sound reproducing apparatus using a multitrack film record, and comprising a lamp 2, optical system 3, film drum 10, and photo-electric cell 14.
Patent GB-260052-A (GB)
Title: Improvements in and relating to current collecting devices for dynamo electric machines
IPC: H01R39/38
Filed: 1925-07-25
Abstract: 260,052. British Thomson-Houston Co., Ltd., and Pollock, A. A. July 25, 1925. Brush - holders.-In duplex brush gear, a spring-pressed plunger is provided to press on each brush portion and the springs 8, 9 that actuate the plungers 4, 5 are balanced against each other, so that if unequal wear should occur on the brush portions 1, 2 their pressure on the commutator will be maintained equal. The lower ends of the springs abut on collars 6, 7 attached to the plungers, and their upper ends against slidable sleeves 10, 11 provided with rack teeth meshing with a common pinion 15 located between them. The pinion and the plunger guide 12 are carried by a bracket 18 slidable on a ratchet 20 attached to the arm 3, the ratchet being kept in engagement with a projection 19 by a spring 21. To facilitate renewals &c., the plunger guide 12 is pivoted at 17.
Patent GB-1189692-A (GB)
Title: A Circuit System for Monitoring Yarns and for Cutting Portions Thereof Deviating from a Predetermined Standard Thickness.
IPC: B65H63/06
Filed: 1967-04-25
Abstract: 1,189,692. Photo-electric detection of yarn defects. JONAN ELECTRIC CO. Ltd. April 25, 1967 [April 25, 1966], No.18975/67. Heading G1A. A photo-electric system is used to detect yarn defects i.e. portions having a diameter greater or smaller than a desired value, and to operate a cutting device to cut out such defective portions. The system has a safeguard against operation of the cutter when the yarn is initially introduced in front of the detector. The system as shown in Fig. 1 has a photoelectric detector 1, the output from which is amplified at 2. When there is an increase in the diameter of the yarn, the output of the detector decreases and this changing signal is integrated by circuit 3. If it is greater than a preset level, a discriminator circuit 4 causes operation of the cutters. Similarly, for decreases in yarn diameter channel 7, 8 operates. However, the discriminator circuit 4 does not operate in the absence of an input from control circuit 6. This comprises an amplifier and rectifier circuit and responds to the ripple caused by continual minor fluctuations in the diameter of the yarn. The circuit passes only signals due to decreasing diameter changes and so when the yarn is initially introduced no signal is immediately passed by circuit 6 to gate on circuit 4 and cutting of the yarn is avoided. However, once the yarn has been introduced the noise signal is generated and the system operates as described above. The voltage correcting circuit 9 generates a D. C. voltage corresponding to a standard diameter and allows positive and negative deviations to be detected. With suitable circuit modifications it may be omitted.
Patent GB-275215-A (GB)
Title: An improved tool holder for lathes and like machines
IPC: B23B27/20
Filed: 1927-07-18
Abstract: 275,215. Rauzieres, P. E. F. July 29, 1926, [Convention date]. Diamond and like tools.-In tool-holders for holding cutters made of alloys with a base of tungsten, chromium, &c. or of substances such as corundum, sapphire or diamond, the cutters are gripped by jaws in a self-aligning manner so as to prevent their fracture by uneven pressures. In one form the cutter 6, Fig. 3, is supported by the top plane surface 5 of a block 4 having a spherical seating 3 in the tool-holder 1 and is gripped by a cap 7 and a central bolt 10. The rear end of the cap is supported by two screws 14 adjustable to suit the thickness of the cutter and the latter has inclined surfaces 6<1>, 6<2> which cause it, on being gripped, to be pushed rearwardly against a stop piece 16 held against the cap by a plate spring 15 and pins 17. In a modification the cutter 6, Fig. 7, has an inclined rear surface for engaging the stop 16 in such a manner that the rearward thrust P will have a vertical component R to press the stop against the cap and relieve a spring washer 30 from compression. The screws 14 may be replaced by balls 20 or by a cylinder. In another modification the block 4 is replaced by two blocks having cylindrical surfaces with the axes at right angles to each other, the blocks being both below the cutter or one below and one above. In a further modification the block is replaced by a conical block whose flat base engages the under surface of the cutter and whose apex seats in a hole formed in the holder 1.
Patent GB-423709-A (GB)
Title: Improvements in or relating to head-wind brakes for aircraft
IPC: B64C9/32
Filed: 1934-06-27
Abstract: 423,709. Controlling aircraft. JUNKERS - FLUGZEUGWERK AKT.-GES., 40, Junkersstrasse, Dessau, Germany.- (Assignees of Junkers, H. ; 21, Hauptmann Loeper Platz, Dessau, Germany) June 27, 1934, No. 18995. Convention date, July 3, 1933. [Class 4] In a speed control or braking device for aircraft of the kind comprising transverse strips pivotally mounted on the under side of the wings and adapted to be swung into a braking or operative position, the strips 10, Figs. 1 and 2, which extend transversely for a distance c exceeding half the length of either wing, are disposed rearwards of the leading edge 12 of the plane a distance a which is not greater than 40 per cent of the chord t of the wing and in an operative position project a distance b that is not greater than 6 per cent of the chord, whereby the resistance to forward movement is considerably augmented when the lift is small or negative. Adjustment of the strips 10 may be effected either by the pilot or automatically on the aircraft attaining a predetermined speed. The strips may be in the form of flat plates or sectors or, as shown in Fig. 5, of arcs or scoops 20 controlled directly by bell-crank and link mechanism 22, 23 with means 26, 27 for retaining the strips in any adjusted position. If desired, springs may be incorporated for lessening the effort to be exerted by the pilot, or, as shown in Fig. 8, the two strips 30 may be interconnected by gearing 32 so that the wind-pressures thereon counterbalance, and each strip may be divided into a number of independently controlled shorter strips. In another modification, Fig. 12, (not shown), the wind pressure on an auxiliary vane is employed to lessen the effort of the pilot; or the atmospheric pressure acting on such an auxiliary surface or on the strip itself may be utilized alone to actuate the strip without any effort on the part of the pilot. Fig. 15 shows an arrangement in which the strips 30 are automatically actuated, when the speed exceeds a predetermined limit, by the pressure effect of air collected through a pipe 74 upon an adjustable control piston 71.
Patent GB-1135929-A (GB)
Title: High expansion foam generator
Inventor: O'REGAN JAMES FRANCIS
IPC: A62C3/02
Filed: 1966-04-29
Abstract: 1,135,929. Foam discharge apparatus. E. W. BLISS CO. 29 April, 1966, No. 19086/66. Headings B1C and B2F. An apparatus for discharging a spray foam for use in fire-fighting comprises an air tunnel 14 having an inlet 15 and an outlet 16, a plurality of liquid nozzles 54 connected to a supply of foam-producing solution and mounted on condiuts 52 within the tunnel adjacent the outlet 16, a net or sieve 20 covering the outlet 16, and a fan 12 mounted in the tunnel 14 rearwardly of the nozzles 54 and driven by a hydraulically operated motor 40. The motor 40 is driven by the flow of foamproducing solution through a recirculation conduit system including a restriction 75. A grill 60 is located between the fan and the nozzles 54.
Patent GB-772385-A (GB)
Title: Apparatus for pneumatic transporting of grain or similar materials
IPC: B01J8/00
Filed: 1955-07-11
Abstract: 772,385. Pneumatic conveyers. AKTIEBOLAGET SVENSKA FLAKTFABRIKEN. July 1, 1955 [July 10, 1954], No. 19117/55. Class 78 (1). In a conveyer of the kind in which material is fed into the system by a rotary bladed wheel 7 and is blown through the pipe 12 by a stream of air produced by a centrifugal fan 1, a governor 2 placed between the fan and feeding device increases the quantity of air with increasing counter-pressure towards a predetermined maximum value and shuts off the supply of material by stopping the wheel 7 at a certain position of the floating body 3 of the governor corresponding to a predetermined minimum quantity of air. The current supplied to the driving motor 6 for the wheel 7 is cut off by a microswitch 5 when the latter is actuated by the rod 4 connected to the floating body 3. Specification 700,742, [Group XXIX], is referred to.
Patent GB-324608-A (GB)
Title: Improvements relating to loud speakers
IPC: H04R11/00
Filed: 1929-06-21
Abstract: 324,608. Gardner, C. A., and Gardner, A. C. June 21, 1929. Magnetic instruments. - A four-pole magnet system for loud-speakers comprises an armature e mounted on a frame f connected to the diaphragm j by a rod i and carried on the end of a lever k which does not vibrate with the transmission end of the frame but can be adjusted about its fulcrum point m to adjust the armature setting without varying the stress in the frame. One side of the lever k is loaded by a spring n and the other side by an adjustable, spring-controlled, screwed abutment piece o, the movement of the lever by the screw o being limited by a stop q on the cover plate r. The armature is surrounded by a coil g and vibrates between pole pieces b carried by magnets c screwed to the non-magnetic frame a.
Patent GB-829146-A (GB)
Title: Improvements in or relating to multiple glazed window units
IPC: E06B3/663
Filed: 1957-06-18
Abstract: 829,146. Multiple glazing units. PILKINGTON BROS. Ltd., BENNETT, J., and ASHCROFT, R. E. May 23, 1958 [June 18, 1957], No. 19218/57. Class 56. A multiple glazing unit comprises superposed glass panes 1, Fig. 1, welded at their edges to interposed marginal spacer strips 3 of glass of similar coefficient of expansion, the strips being of such lengths as to form a completely closed space between the panes. The unwelded elements are assembled on a support 2 on a carriage 5 movable along rails 7 and are given a preliminary heating in an oven 12. The carriage is then moved, by rotating a hand crank 22, to convey them to the welding unit wherein a burner 27 comprising four sections forming the sides of a rectangle is lowered, by a pneumatic piston and cylinder mechanism 31 under the control of a pedal-operated valve 33, to heat the pane edges and the spacer strips. A presser frame 46 surrounding a heat-insulating sheet 47 is also lowered, by manual actuation of a lever 56, into contact with the top pane. Means may be provided to move the support 2 obliquely if the panes are smaller than the frame 46 so that only two adjacent edges of the assembly are welded at a time. After welding, the assembly is passed to an annealing lehr 14.
Patent GB-225257-A (GB)
Title: Improvements in biplane wings for aircraft
IPC: B64C3/14
Filed: 1923-07-26
Abstract: 225,257. Gloucestershire Aircraft Co., Ltd., Folland, H. P., and Preston, H. E. July 26, 1923. Planes, construction and arrangement of.-The top plane 1 of a biplane is of thick high lift section and the bottom plane 2 is of normal section. The outer ends of the top plane 1 are tapered in thickness for about one fifth of the span. The thickness of the upper plane is also reduced towards the centre in the region of the propeller slip-stream. The centre portion and the tapered tips are given a slightly reduced incidence. In a modification, the thickness is not reduced at the centre. Steering, balancing, and regulating altitude.- Ailerons 6 are provided, the chords of which increase towards the wing tips.
Patent GB-147174-A (GB)
Title: Improvements in and relating to packing cases for conservation and transport of fresh fish, meat, and other perishable goods
IPC: B65D81/26
Filed: 1920-07-07
Abstract: 147,174. Spiedel, R. Oct. 19, 1917, [Convention date]. Fittings, internal; drying, moistening, and like agents, specially designed for; jacketed cases; ventilating, and draining cases. - A double-walled case for the transport of fresh fish, &c. packed in ice e has the vertical walls of the interior case b based on the bottom of the exterior case a and provided with strips o supporting a removable bottom g. The bottom g and the bottom of the exterior case are perforated to allow the escape of melted ice and for ventilation, the perforations being covered with layers of wood shavings f which prevent the melted ice carrying the sawdust or other insulating material, packed between the cases, through the perforations. Rings k are provided on the bottom g so that it can be easily removed.
Patent GB-815520-A (GB)
Title: A process for polymerizing olefinic hydrocarbons
IPC: C08F10/00
Filed: 1955-07-04
Abstract: <PICT:0815520/IV (a)/1> In a continuous process for the polymerization of at least one 1-olefine, e.g. ethylene, propylene, 1-butene, 1-pentene and hexenes, a solution of the olefine in a liquid solvent is contacted with a catalyst under polymerizing conditions in a polymerization zone, the solvent is separated from the polymer and fractionated, together with added make-up solvent, to remove catalyst poisons accompanying the make-up solvent as low-boiling materials, and the mixture of recovered and make-up solvent introduced to the polymerization zone.  The catalyst may be a composite comprising chromium oxide and at least an additional oxide selected from the oxides of silicon, aluminium, zirconium, and thorium, at least a portion of the chromium being in the hexavalent state, and solvents mentioned are iso-octane, n-pentane, n-heptane, n-decane and n-dodecane, and the impurities may be oxygen, ethane and water.  In an example, Fig. 2, ethylene is absorbed in an inert solvent, e.g. iso-octane, in absorber 1, and polymerized in chambers or zones, 4 or 5, containing a chromium oxide catalyst on a silica-alumina composite, at 320 DEG  F. and 400 p.s.i. pressure. The effluent is flashed, 10, molten polymer withdrawn and the vaporized material condensed 13, and fractionated in columns 14, 24 and 27, make-up iso-octane being added at inlet 30 or 30A.  The impurities are removed at outlet 31, and purified iso-octane recycled by conduit 29, as the primary solvent stream.  Specifications 790,195 and 815,521 are referred to.