baber/WOPTO huggingface dataset:
Patent GB-517580-A (GB)
Title: Improvements in or relating to radio direction finding receivers
IPC: G01S3/12
Filed: 1938-07-29
Abstract: 517,580. Directive wireless systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and COCKERELL, C. S. July 29, 1938, No. 22686. [Class 40 (v)] Relates to direction-finding receivers fitted with manuallyoperable sensitivity control effective upon the carrier stage of the receiver in which the audiofrequency output increases to a maximum and then decreases with increasing radio-frequency signal input. Such receivers may give false minimum signal directions corresponding to a minimum audio output produced from a maximum radio signal and according to the invention such false indications are avoided by providing a warning means which is operated automatically if the received carrier strength exceeds a predetermined value. In Fig. 2, the warning means comprise a discharge tube S which is in series with a resistance R3, the series combination being shunted by a condenser C1 and being in series with a further resistance R2. As shown, this circuit is connected across the anode resistance R1 of the anode-bend detector V which may also be the signal detector. Alternatively the circuit may be connected between the anode and earth of a leaky-grid detector (Fig. 3, not shown), or, if a diode or oxide type of rectifier is used, the circuit may be connected between the anode and earth of the following valve, the grid of which is fed with a D.C. component of the rectified radio signal (Fig. 4, not shown). In all these cases an increase in signal input above a predetermined value causes the discharge tube S to flash intermittently. Fig. 5 shows a receiver for C.W. transmissions in which the I.F. output derived from heterodyning the received signal with a first local oscillation is mixed with a second local oscillation from 2LO, the audio difference frequency being obtained at the rectifiers Xl, X2, the output from which is fed directly to the grid of the following valve V1. The D.C. component of the rectification products which depends upon the received signal strength is thus applied to the valve V1 across which the warning circuit R2, R3, C1, S is connected. The discharge-tube warning arrangement described also acts as a rough direction indicator since it shows within a comparatively small arc the direction of the minimum signal. The discharge tube may be replaced by a cathoderay tube or by an electrical or mechanical relay actuating a warning lamp or buzzer.
Patent GB-1292939-A (GB)
Title: Pressure-sensitive recording paper
IPC: B41M5/165
Filed: 1971-04-19
Abstract: 1292939 Microcapsules FUJI PHOTO FILM CO Ltd 19 April 1971 [27 Feb 1970] 22762/71 Heading C3R [Also in Divisions B8 and D2] Microcapsules for use in pressure-sensitive recording paper are prepared by dissolving a single wall-forming material capable of forming, or two or more wall-forming materials capable of reacting to form, a polymeric compound which is insoluble in both oil and water, in an oily liquid (defined) containing a colour-former and a first carrier solvent (defined) to prepare a solution, emulsifying the solution in a second solvent, which is a polar solvent, forming a continuous phase and miscible with the first solvent elevating the temperature of the emulsified system to transfer the wall-forming material or materials to the surface of the oil drops and to cause the wall-forming material or materials to form the polymeric compound on the surfaces of the oil drops, thereby producing the microcapsules containing the colour-former. Suitably, a catalyst to promote the wall-forming reaction is incorporated in the solution. It is preferred to use as the wall-forming materials a polyisocyanate or polyisothiocyanates and a polyamine, polycarboxylic acid, acid anhydride epoxy compound, polyol, polysulphide, lactone or lactam. Numerous solvents are listed for forming the solution. Water is the preferred second solvent. Protective colloids or surfaceactive agents may be used to emulsify the oily liquid. Examples of colour formers are triphenylmethane compounds, diphenylmethane compounds, xanthene compounds, thiazine compounds and spiropyran compounds. The oily liquid is any liquid capable of being emulsified to formliquid drops in and immiscible with the second polar solvent, with the use of a surface-active agent or protective colloid, if necessary, andis suitably a chlorinated diphenyl, chlorinated paraffin, cotton seed oil, peanut oil, silicone oils, tricresyl phosphate, monochlorobenzene, kerosene, n-paraffins or iso-paraffins. In a typical example, crystal violet lactone is dissolved in a mixture of chlorinated diphenyl and kerosene and to the solution is added bisphenol A dissolved in a mixed solvent of acetone/ methylene chloride, xylylene diisocyanate and dibutyl tin laurate as catalyst. The resulting solution is poured into an aqueous solution of gum arabic with stirring to form an emulsion, followed by the addition of more water and heating to bring about the encapsulation. After cooling a styrene-butadiene latex, sodium alginate and cellulose powder is added as a binder to complete the preparation of a micro-capsule solution which may be applied to a support paper for use as a pressure-sensitive recording paper (see Divisions D1-D2).
Patent GB-613509-A (GB)
Title: Improvements in or relating to olefin polymerization
IPC: C07C2/22
Filed: 1944-11-17
Abstract: Olefins are converted to polymers of molecular weight at least that of lubricating oil by polymerization at a temperature not above 200 DEG  F. in the presence of a metal halide of the Friedel-Crafts' type and an alkali metal, said alkali metal being unreactive as an olefin polymerizing catalyst under the polymerizing conditions and sufficient to react with all hydrogen halide, and said Friedel-Crafts' type halide being substantially unreactive with said alkali metal.  Tertiary olefins, e.g. 2-methylpropene or butene, 2 - methyl - 2 - butene, 2-methyl-1 or 2-pentene, 3-methyl-2-pentene or mixtures containing them yield oils of high viscosity index when hydrogen halides present in the system are removed by alkali metal, especially sodium or potassium.  Friedel-Crafts' type halides which can exist in a lower valency state, e.g. SbCl5, must be used at low temperatures to prevent reaction with the alkali metal.  The active metal halide is generally 0.5-10 per cent by weight of the charge. Excess of alkali metal over that required to remove hydrogen halide, e.g. 25-100 per cent by weight of the active metal halide, is desirable.  Pressure is preferably sufficient to liquefy the olefin. Iso-olefins may be selectively polymerized from mixtures with normal olefins which can then be polymerized with metal halide and a modifier such as hydrogen chloride, for example as in U.S.A. Specification 2,320,256.  Polymers for use as lubricants may be stabilized by hydrogenation or alkylation. Diluents may be added to the reaction zone, for example a media for the solid catalysts components.  The products are separated from catalyst which may be recycled or spent catalyst removed after separation and recycling of alkali metal, treated with adsorbent clay or alkali and fractionated. In examples, an isobutene charge containing 2.6 per cent propene and n-butene, and 9.6 per cent isobutane is polymerized with ZrCl4 at 153 DEG  F. in an autoclave, the effect on viscosity index of the product of adding sodium or hydrogen chloride being illustrated.  Aluminium chloride is heated with Na-K alloy in paraffin at 220 DEG  F. without reaction occurring, the product being active for iso-olefin polymerization.
Patent GB-185406-A (GB)
Title: Improvements in reinforcing elements for trunks and methods of applying the same
IPC: A45C13/36
Filed: 1922-08-22
Abstract: 185,406. Goldsmith & Son, Inc., L., (Assignees of Goldsmith, N.). Aug. 30, 1921, [Convention date]. Corner strengthening pieces. - A reinforcing element for a trunk comprises one or more strips of angular section provided with longitudinal strengthening ribs in the flanges and rigidly secured to a corner shield. The strips 4, Fig. 2, of the. eight such elements A projecting the corners of the trunk are of such length as to cover the edges completely; a joint piece 6, rigidly secured to the end of one of two adjoining strips, projects beyond the strip and fits over the free end of the other strip. The free ends of the strips extending depthwise of the trunk are secured to the trunk by end pieces 10, 11, Fig. 7, and the end piece 11 of the cover strip projects beyond the strip and overlaps the inwardly offset end piece 10 on the body. Strengthening-rods may be arranged within the angle between the flanges of the strips, and the ribs 14 are preferably formed adjacent the free edge of each nange and serve to protect the heads of the securing nails.
Patent GB-1220743-A (GB)
Title: Body armour for airmen
Inventor: SHIRLEY ALBERT JOHN WILLIAM
IPC: H01H3/50
Filed: 1968-05-14
Abstract: 1,220,743. Body armour. M. L. AVIATION CO. Ltd. 28 April, 1969 [14 May, 1968], No. 22898/68. Heading A3V. Body armour for an airman comprises a vest-like harness 1, an armoured protective shield 24 shaped to cover at least the front of the airman's torso, a pair of upper straps 6, 7 for securing the upper part of the shield to the respective shoulders of the vest-like harness 1, and lower straps 18-20 for securing the lower part of the shield to the waist of the vest-like harness to support thereby at least the greater part of the weight of the shield. The vest 1 has a sliding clasp fastener 2 at the front, and is adjustable at the waist by belt 3; webbing straps 6 and 7 are sewn to the vest at 8 and 9, and pass through buckles 10 and 11 sewn to the vest at positions below the top of the shield. The straps have pads 14, 15 of "Velcro" (Registered Trade Mark) for attachment to similar pads 30 and (31), Fig. 2 (not shown), and serve to hold the shield against the airman's chest; pads 16, 17 of "Velcro" are provided on the straps 6, 7 to co-operate with pads 14, 15 when the shield is not being worn. Lower straps 19, 20 are sewn to the vest, and are also sewn to a strap 18 having apertures 21 and a "Velcro" pad 22. The strap 18 is passed beneath the shield and is placed over a spigot 28 on the shield which passes through one of the apertures 21; "Velcro" pad 22 co-operates with a similar pad 29 on the shield. The strap 18 may be disengaged by pulling loops 23. The shield has a flared portion 25 to protect the airman's neck and preferably extends rearwardly to co-operate with the sides of the airman's seat, and is of an armoured plastics material such as to Department of Technical Development DTD/900/4875; the vest is of "Terylene" (Registered Trade Mark).
Patent GB-739589-A (GB)
Title: Improvements in and relating to electromagnetic pick-off and torque motor devices
IPC: H02K24/00
Filed: 1954-08-06
Abstract: 739,589. Selsyn machines. GENERAL ELECTRIC CO. Aug. 6, 1954 [Aug. 6, 1953], No. 22963/54. Class 35. [Also in Group XXXVIII] A Selsyn machine comprises two pairs of poles 4, 5 and 9, 10 set in quadrature and a non- magnetic short-circuited rotor 12 which produces coupling between the polar axes depending on its angular position. When used as a Selsyn transmitter poles 4. 5 are energized from terminals 6 and the error signal is derived from the quadrature poles at terminals 11. If desired, the pick-up poles 9, 10 may be made larger to increase the output. When the machine is used as a motor the quadrature poles are excited in dependence on the error signal to produce a resultant flux rotation which turns the rotor. In a modification, the rotor may comprise a flat conducting plate in the same plane as the short-circuited. coil. Flux dispersion may be avoided by the inclusion of a central core 35, as shown in Fig. 4. In this form, the rotor comprises a pair of end-rings 39, 40 joined by bars 37. The application of the invention to the control of a rate-of-turn gyroscope is described (see Group XXXVIII).
Patent GB-182718-A (GB)
Title: Improvements in dress stiffeners and in the method of producing the same
IPC: A41C1/20
Filed: 1921-08-31
Abstract: 182,718. Faire, J. E. Aug. 31, 1921. End-capping rods. - The end of a corset steel or like garment stiffener 1 is formed with a series of knobs 2 and a cap of softer metal 3 pressed thereto under a power hammer or equivalent.
Patent GB-486376-A (GB)
Title: Improvements in and relating to the manufacture of shoes with rubber soles
IPC: B29C35/00
Filed: 1937-08-23
Abstract: 486,376. Vulcanizing rubber shoes. BATA AKCIOVA SPOLECNOST. Aug. 23, 1937, No. 23116. Convention date, Aug. 21, 1936. [Class 70] Shoes with rubber soles are vulcanized on hollow lasts in a closed space which is preferably thermally insulated to the outside, hot air or other medium being circulated by a suction source such as a fan to the interior of the lasts, thence to the vulcanization space and over heating bodies back into the lasts, which circuit is constantly repeated. As shown. air is circulated by a fan 3 up a pipe 9, into the lasts, out into the vulcanizing space, over a steam heating coil 6 and into the fan space again. The shoes are thus uniformly heated from within by the circulating hot air and from without by the heat radiated from the heating coil 6.
Patent GB-481265-A (GB)
Title: Improvements in or relating to metal-vapour discharge tubes
IPC: H01J61/28
Filed: 1937-08-24
Abstract: 481,265. Discharge lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Aug. 24, 1937, No. 23239. Convention date, Aug. 26, 1936. [Class 39 (i)] A metal - vapour dischargedevice, such as a lamp, is provided with a receptacle for a difficultly volatilizable metal arranged in front of the electrode, so that the discharge passes around them. The. arrangement shown comprises a U-tube 1 having electrodes 2 heated by the discharge and porcelain receptacles 3 supported by -wires 8 in front of the electrodes and having openings 4 on the side remote from the electrodes. In place of separate openings the receptacles may be made wholly or in part of porous material.
Patent GB-171160-A (GB)
Title: A new improved spring mattress
IPC: A47C23/02
Filed: 1920-08-07
Abstract: 171,160. Amies, E. Aug. 7, 1920. Spring surfaces.-Mattresses, seats, &c. of the kind comprising a number of arched wires or strips mounted in a frame in two sets crossing' at right-angles are constructed by cutting-off lengths of wire b<1>, b<2> from a coil and inserting their ends in vertical holes in the frame members a, a<1>. The longitudinal wires b<2> are interlaced with the transverse wires b<1>. Additional frame members a<3> may be arranged as shown to receive the ends of the transverse wires, which are thus doubled in number down the centre of the mattress. Edging-wires b<3> are attached round the frame, and flexible canes may be tied to these to form an edging.
Patent GB-1162273-A (GB)
Title: Film Advancing Means
IPC: G03B1/54
Filed: 1967-05-18
Abstract: 1,162,273. Intermittent film feed mechanisms; printers. GREYHOUND LEASING & FINANCIAL CORP. May 18, 1967 [May 31, 1966], No. 23262/67. Headings G2A and G2E. An intermittent film advancing mechanism, particularly in a cine film projection printer, comprises continuously driven sprockets 15, 16, 20, 21, an eccentrically mounted beater roller 70, a register pin 55 adjacent projection aperture 51 engaging a film perforation and shaped to restrict film movement towards a loop-forming suction chamber 56, and an aperture block or gate 50 having a curved film track. In the printers of Fig. 1 (not shown), negative film (11) is advanced by the above mechanism past light source (25) and shutters (27), the projection beam being directed along tubes 52, 53, Fig. 2, to lens (28) opposite similar film advancing mechanism (40) in light-tight box (44) containing the unexposed positive film (26). The two films move in opposite directions.
Patent GB-1366244-A (GB)
Title: Process for surface treatment of graphite fibre
IPC: D01F11/12
Filed: 1972-05-17
Abstract: 1366244 Treating graphite fibres LOCKHEED AIRCRAFT CORP 17 May 1972 [17 May 1971 6 April 1972] 23286/72 Heading C1A Graphite fibres, that is carbon fibre which has been derived from organic polymer fibre and which has been heated at a graphitizing temperature for a time sufficient to produce some graphite structure, are treated by subjecting their surface for a period of 2À5 to 7À5 minutes to a dry atmosphere consisting essentially of oxygen in a carrier gas which is non-reactive to graphite under the conditions used, the atmosphere being at a temperature of 475‹ to 600‹ C. and containing oxygen in an amount of 1À65 to 10% by volume. Preferred ranges are 3 to 7À2 minutes and 1À65 to 6À0% by volume respectively, and particularly preferred values are given.
Patent GB-459674-A (GB)
Title: Method and apparatus for incorporating to a stream of fluid under pressure other fluid or powdered bodies
IPC: B01F23/30
Filed: 1935-08-19
Abstract: 459,674. Fire-estinguishers. PROTECTION ET EXTINCTION, 45, Boulevard Gouvion Saint Cyr, Paris. Aug. 19, 1935, No. 23303. Convention date, Aug. 18, 1934. [Class 47 (ii)] [See also Group II] An apparatus for mixing a fluid stream with fluid or powder of higher density comprises a container for the powder &c. having a bottom of such shape that the stream is given a curvilinear path so that the adjacent powder &c. is mixed therewith by centrifugal force. The fluid passes to the container 5, which is wedge-shaped in cross-section, by a pipe 3 and emerges by a pipe 6, the bottom of the container being curved as shown. A non-return valve 8 may be provided, and the pipe 3 may have an adjustable nozzle to vary the stream. An adjustable damper may be provided to control the area of contact between the fluid and powder.
Patent GB-397670-A (GB)
Title: Pipe joint without packing
IPC: F16L19/04
Filed: 1932-08-19
Abstract: 397,670. Pipe joints. FUCHS, G., 151, Schmidenerstrasse, and SP€TH, H., 2, Kuferstrasse, both in Cannstatt, Stuttgart, Germany. Aug. 19, 1932, No. 23324. [Class 99 (i).] A coupling member a has curved, flexible extremities d<1> which are compressed on to the pipes by the nuts g and force the ends of the pipes into contact with bevelled shoulders c on the coupling member. In a modification, the pipe ends are forced on to the shoulders by screwing the pipes into the coupling member.
Patent GB-795511-A (GB)
Title: Improvements in or relating to lowering mechanisms
Inventor: LOCKETT GEORGE EDWARD
IPC: B66D5/00
Filed: 1955-08-12
Abstract: 795,511. Spring &c. weight storing mechanism. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Aug. 10, 1956 [Aug. 12, 1955], No. 23354/55. Class 10. [Also in Group XXXIV] A weight O is normally raised by a cable 14 passing over a pulley 15 by a motor 1 coupled to a pulley 13 through an electromagnetic clutch 3, spur gears 9, 10 and 11 and shaft 12. When the weight is to be lowered, de-energization of the motor disengages clutch 3 so that the weight drives a spur-gear 21 meshing with a larger spur-gear 22. The gear 22 is coupled through a link arm 23 to a further spur-gear 26, which through gears 27, 28, 29 and 30 drives a flywheel 20, the shape of the link arm 23 and the manner of its coupling to the gears 22 and 26 being such that the drive ratio increases slowly initially and then more rapidly. This is illustrated by the movement of the link 23 from position AB to position A<SP>1</SP>B<SP>1</SP> in Fig. 3. In this way the increasing inertia effect of the flywheel 20 acts to vary the rate of descent of weight O. The final descending movement is damped by the spring plunger 32 acting on the serrated edge 33 of torque ring 16.
Patent GB-152190-A (GB)
Title: Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like
IPC: H03F3/02
Filed: 1919-09-23
Abstract: 152,190. Smart, J. H., and Tucker, J. Sept. 23, 1919. Thermionic relays and repeaters.-In an amplifying system employing two threeelectrode valves for telegraphic recorders, relays, and telephones, the grid g<1>, Fig. 1, of the valve P is connected to line, the anodes a<1>, a<2> of the valves P, Q to the battery B, the earthed filament j' of the valve P to the grid g<2> of the valve Q, and the filament f<2> of the valve Q to the battery through a recorder R. In the arrangement shown in Fig. 2 the normal current from the battery B through the valves P, Q and receiver R is balanced by a current from the battery B<1> through the resistancer<1>. The two valves may be combined in one unit.
Patent GB-591666-A (GB)
Title: Improvements in or relating to airplane fuselage and wing constructions
IPC: B64C3/00
Filed: 1945-09-13
Abstract: 591,666. Fuselages ; framework wings. BUDD MANUFACTURING CO., E. G. Sept. 13, 1945, No. 23600. Convention date; Sept. 13, 1944. [Class 4] An aeroplane constructed according to the invention, which constitutes an improvement upon that of Specification 590,510 comprises a fuselage having an open compartment 4 surrounded by a body girdle including side bulkheads 3 of the full height of the compartment, and wings (one of which is shown before attachment) and upper and lower girders 5, 6 all overlapped with and secured to the bulkheads. The bulkheads preferably comprise a pair of stamped plates welded face to face and have strengthening flanges 24 on each side and wales 30 formed in each plate ; the flanges 24 are omitted at the points of connection to the girders. Webs of the wing spars are sandwiched between the bulkhead component plates and welded. As in the Specification referred to there are five girdles spaced along the fuselage, connection to the intermediate ones being made by stringers of the wings.
Patent GB-1077428-A (GB)
Title: Improvements in or relating to automatic temperature control apparatus
IPC: H05B3/78
Filed: 1965-06-03
Abstract: 1,077,428. Automatic temperature control of liquid baths. O. BRAUN and B. BRAUN [trading as B. BRAUN]. June 3, 1965 [June 18, 1964], No.23702/65. Heading G3R. Control apparatus for maintaining the temperature of a liquid bath constant comprises a contact thermometer 6 forming a temperature sensing device, a tubular heating element 4, a device 5 of the vibratory or diaphragm pump type for agitating the liquid in the bath an electromagnetic relay 2 housing contacts 3 for controlling the energization of the heating element 4 in an ONOFF manner under the control of the sensing device 6, the apparatus being characterized in that all the components, together with a plastic housing 1, are formed into a unitary assembly for immersion in the liquid bath.