baber/WOPTO huggingface dataset:
Patent GB-738473-A (GB)
Title: Improvements in or relating to the production of thermoplastic resinous material
IPC: B29B9/06
Filed: 1953-11-05
Abstract: <PICT:0738473/IV (a)/1> Thermoplastic resinous materials are prepared by copolymerizing in bulk 60 to 90 per cent by weight of compounds of the general formula <FORM:0738473/IV (a)/1> (where R may be hydrogen, methyl radical, and R1 chlorine or a lower alkyl radical, and n = O to 2), e.g. styrene, o-, m-, and p-methyl styrene, 2,4-dimethyl styrene, 2,4 and 2,5-dichlorostyrenes and a -methyl- and a -chlorostyrene or mixtures thereof, with 10 to 40 per cent of acrylonitrile.  The copolymerization is carried out between 85 DEG and 120 DEG  C. to a conversion of 40 to 60 per cent when the mixture is passed through a sectionally heated zone at 110 DEG  to 190 DEG C. at a pressure of 5-100 mm. of mercury over a period of 1 to 3 minutes while simultaneously extruding and cooling the polymer and devolatizing the unreacted material which is recovered and recycled. Catalysts such as benzoyl, di-t-butyl, and lauroyl peroxides, t-butyl hydroperoxide, and t-butyl perbenzoate or mixtures thereof may be used.  A suitable apparatus comprises a polymerization pot 1 in which the monomers are rotated and heated at 85-100 DEG  C., and a twin-screw devolatization extruder into which the partially polymerized charge is forced.  The extruder is heated in sections and the volatiles removed through ports 25 and 26, condensed and recirculated.  The extruded material containing more than 98 per cent polymeric material is pelleted.
Patent GB-1308173-A (GB)
Title: Production of optical surfaces and elements
IPC: B29D11/00
Filed: 1970-06-24
Abstract: 1308173 Moulding optical surfaces OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES 24 June 1970 [24 June 1969] 30659/70 Heading B5A Optical surfaces are made by moulding on to a support of approximately the required shape a layer of hardenable resin by means of a matrix having an optically accurate surface of the required shape, the resin layer being caused to adhere to the support. The matrix is produced by conventional optical techniques whereas the support surface is as geometrically simple as possible, e.g. plane, conical spherical, pyramidal, or cylindrical whilst approximating to the required shape and produced by milling, turning, casting, or die stamping. The matrix may be glass or aluminium alloy with a thick deposit of chemical nickel, the support of glass, silica or metal and the resin epoxy or cyanoacrylic. Dioptric elements such as lenses use a support body of glass and two optical surfaces are formed on it by the above process. In an example, the matrix is a zone of an optical cube adjacent one corner, i.e. tretrahedron 13, metallized under vacuum to give a reflective anti-adhesive coating. A support body 20 of aluminium alloy has a recess 21 approximating to the tetrahetron and a layer 22 of hardenable resin is brushed on to the three internal faces. The tetrahedron is placed in the recess 21 and a weight 27 added to ensure even distribution of the resin. There results an optically accurate reflector having three mutually perpendicular reflecting surfaces. If the optical element is to be refracting the anti-adhesive coating is removed from the resin layer by a suitable chemical agent.
Patent GB-915810-A (GB)
Title: Fluid-flow control valves
IPC: F16K3/28
Filed: 1959-09-08
Abstract: 915,810. Valves. BUCKLEY, A. B. July 11, 1960 [Sept. 8, 1959], No. 30692/59. Class 135. A tap has a body 1 (Provisional drawing), in which is screwed a member 1a housing a threaded operating spindle 2 that receives the stem 4 of a jumper consisting of a washer plate 5 from which depends a stud 6 with an enlarged head 7 that is surrounded by a resilient member 8 held in position by a screw 9. An axial bore 10 in the latter, the clearance between the threads of the screw and head 7, and a diametrical bore 11 across the head 7 enable liquid from the inlet 12 to act upon the internal surface of the member 8 and urge it into sealing engagement with the seat bore. In a modification, the jumper stem 24, Fig. 1, has circlips 25 to provide a swivel connection to the operating spindle 23; the jumper embodies the washer plate 26 and a stem 27, the latter having two nuts 28 supporting washers 29, 31 and the cup-shaped resilient member 30, the interior of which is open to the inlet by a passage 33. The lip of the member 30 is forced against the washer plate 26 by tightening the nuts 28; the number of washers used may be varied. In another form, a sleeve surrounds the stem 27 to prevent over compression of the member 30; sleeves of different length may be used to vary the pressure with which the member 30 is urged against seat bore 32. The circlips 25 may be replaced by a pin or by punching part of the spindle into a groove in the jumper stem. The resilient member may be built up from a cup-shaped member and a compressible ring.
Patent GB-1085074-A (GB)
Title: Quinolizine derivatives
IPC: C07D455/03
Filed: 1964-08-04
Abstract: The invention comprises compounds of the general formulae <FORM:1085074/C2/1> <FORM:1085074/C2/2> <FORM:1085074/C2/3> (wherein R1 represents H or lower alkyl, R2 represents H, OH, COOH or a cyclic ketal group of the formula <FORM:1085074/C2/4> R12 represents H, OH, COOH or COCH3, and n is 1 or 2), the preparation of compounds (I) by reducing a compound of the general formula <FORM:1085074/C2/5> with lithium, sodium or potassium in a solvent system comprising liquid ammonia, dimethylamine or diethylamine in the presence of a hydrogen donor (e.g. a lower aliphatic alcohol), the preparation of compounds (II) by hydrolysing compounds (I) with a strong inorganic acid, and the preparation of compounds (III) by treating compounds (II) with acids or bases.
Patent GB-509215-A (GB)
Title: Improvements in or relating to percussive drills or hammers
IPC: B25D11/10
Filed: 1938-10-24
Abstract: 509,215. Percussive drills. CHICAGO PNEUMATIC TOOL CO. Oct. 24, 1938, No. 30718. Convention date, March 18. [Class 124] In a percussive drill of the type in which a rotating spring-operated piston' is returned by cam surface on the piston and on a complementary cam element, the latter is frictionally braked against rotation to regulate the amount of rotation, the working tool moving with the cam element. The cam surfaces include a spiral part of relatively steep slope near the base and of less slope near the crest, thereby delivering a larger rotational impulse at first and a smaller later. With the diminished rotation occurs an increased axial movement. As shown, a piston 21, Fig. 1, reciprocates under the action of a spring 23 and cam surfaces 37, 38 respectively on the piston 'and on a complementary cam eleiiaent provided on a bushing 29. The latter is fixed relatively to the tool holder 34. The piston is rotated through the medium of balls 22 engaging grooves in a driving element 18 rotated as for example by an electric motor. With the aid of a holder 41, Fig. 6, provided with brake shoe 45, the tool holder may be held frictionally to regulate the twist imparted thereto. The cam elements 37, 38 are shown in Figs. 9 and 10 and different pitches are employed at 37c and 37d to give first a rapid reciprocation followed by a slower movement.
Patent GB-674918-A (GB)
Title: Improvements in or relating to magnetic recorders
IPC: G11B5/004
Filed: 1950-12-19
Abstract: 674,918. Magnetic recording systems. ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI. Dec. 19, 1950. [Jan. 30, 1950] No. 30867/50. Class 40 (ii). In a magnetic recorder in which a sound head is moved over a record 10 by a carriage 13 driven by a worm 14, the carriage 13 bears a toothed wheel 35 and a ratchet wheel 34 fast to one another, the ratchet wheel being held stationary by an anchor escapement normally, so that the toothed wheel, which meshes with the worm 14, drives the carriage as the worm rotates. Means, such as an electromagnet 40, are provided to move the anchor escapement, and restoring means, such as a spring, move the carriage back in a direction opposite its normal direction at each escape. The guide rails for the carriage or the carriage itself are capable of being tilted to disengage the wheel 35 from the worm 14 and thus permit the position of the carriage to be adjusted to any amount in either direction.
Patent GB-869873-A (GB)
Title: Improvements in vibrating reed relays
Inventor: SMALL CHARLES JOHN PERCIVAL
IPC: G08B3/10
Filed: 1959-09-11
Abstract: 869,873. Piezo-electric switches. WESTREX CO. Ltd. Sept. 11, 1959, No. 31014/69. Class 38 (5). A tubular vibrating reed a carries a springy wire loop contact j for co-operation with fixed contacts k and is clamped at its other end to a part b<SP>1</SP> bent up from a metal plate coupling member b which is fixed to a casing o by screws c. The member b is bent as shown to hold the reed a in a socket b<SP>2</SP> and its end b<SP>4</SP> engages one end of a piezo-electric body e. The other end of body e is pressed downwards by a flat spring g held between blocks q carried by casing o and adjustable by a screw f. The cross-piece of a wire frame s acts as a pivot between the body e and a raised part h of casing o, and is adjustable along the length of body e by means of a screw i. The wire forming contact loop j extends inside reed a and is connected to member b which has a terminal tag n. An alternating drive voltage of appropriate frequency is connected to body e via tag n and member b on the one side, and a tag m, screw i and frame s on the other side. Screw i provides a fine adjustment of the frequency of vibration of reed a. Specification 819,907 is referred to.
Patent GB-1010189-A (GB)
Title: Method of treating steel
Inventor: HOWES MAURICE ALBERT HENRY
IPC: C21D8/00
Filed: 1962-08-14
Abstract: Steel is strengthened by heating it to a temperature e.g 900 DEG C. at which it is converted to austenite, case hardening it e.g. carburizing by packing in charcoal or heating in a carbon-containing atmosphere, cooling it to a temperature, e.g. 520 DEG C., sufficiently high for working and sufficiently rapidly to retain austenite, working the steel to the desired shape during cooling, and finally rapidly cooling, e.g. quenching, the shaped steel to convert to martensite.
Patent GB-428147-A (GB)
Title: Manufacture of organic bismuth compounds
IPC: C07C61/13
Filed: 1933-11-08
Abstract: Monoiodo - endomethylene - hexahydromethylbenzoic acid is obtained by adding hydrogen iodide to endomethylene-2 : 5- D <3>-tetrahydro-6-methyl-benzoic acid.  By adding iodine to the parent acid the corresponding diiodo-acid is obtained.  From the diiodo-acid hydrogen iodide may be split off to give a mono-iodo acid. Specification 374,818 is referred to.ALSO:Bismuth salts of therapeutic value which are insoluble in water, but soluble in ether, chloroform, and oils, are obtained by reacting a bismuth salt such as the nitrate with a wholly or partially hydrogenated endo-methylenebenzoic acid or a substitution product thereof.  Salts of the formula R3Bi or R.BiO, where R is the acid radicle, may both be obtained.  Acids specified for use are camphenilanic acid (obtainable by oxidation of camphene), the endo-methylene-benzoic acid obtainable by oxidation of b -pinene, endo-methylene-tetrahydro-methyl- or ethyl-benzoic acids obtainable by diene-synthesis from cyclopentadienes and crotonic acid, endo - methylene - hexahydrobenzoic acid, endo - methylene - hexahydromethylbenzoic acid, endo-methylene-hexahydroethylbenzoic acid, and camphene-carboxylic acids wherein the endo-methylene hydrogen atoms have been replaced by alkyl groups.  Substituted acids include substitution products of hydroxycamphenilanic acid, monoiodo-endomethylene - hexahydromethyl - benzoic acid obtained by adding hydrogen iodide to endomethylene - 2 : 5 - D <3> - tetrahydro - 6 - methylbenzoic acid, the corresponding diiodo-acid obtainable by adding iodine to the same parent acid, the monoiodo-acid obtained by splitting off hydrogen iodide from the diiodoacid just described, and also nitrated partially or wholly hydrogenated endo-methylene-benzoic acids.  In examples, the acids used are dissolved in water or alcohol in the presence of caustic soda and are reacted with a solution of bismuth nitrate in water and glycerine or mannite.  Specification 374,818 is referred to.
Patent GB-182393-A (GB)
Title: Measuring apparatus for corsets
IPC: A41H1/02
Filed: 1921-11-22
Abstract: 182,393. Hilliard, L. C. Nov. 22, 1921. Measuring for.-A measuring-apparatus for corsets comprises a series of vertical members 10, 14 of flexible resilient material and a series of horizontal tape measures 15 - - 18. The vertical members, which are covered by fabric and slide on the tapes, are adjusted on the figure in the position of the usual corset bones and the tapes are drawn tight and secured by buckles 23, when measurements are taken for the bust, waist &c. Auxiliary tapes 19 may be supported by hooks 22 on the bones. A device for placing the body in the correct position comprises a bar 25 passed beneath the arch of the feet and an elastic cord 26 passing over the shoulders.
Patent GB-1059807-A (GB)
Title: Image dissector photomultiplier tube
IPC: B64G1/36
Filed: 1965-07-22
Abstract: 1,059,807. Photo-electric direction finders. BENDIX CORPORATION. July 22, 1965 [July 29, 1964], No. 31281/65. Heading H4D. [Also in Division H1] In a method of controlling the attitude of a space vehicle relative to a light source, e.g. a star or planet, an image of the light source is projected on to the photo-cathode of an image dissector tube, to produce a stream of photoelectrons which is focused and deflected over an aperture, so that electrons from a small area of the photo-cathode pass through this aperture, and through an electron multiplier tube, to a collector electrode. The output signal is combined with reference output data from one or both of the horizontal and vertical deflection systems to generate an error signal representative of the angular position of the vehicle relative to the light source. The error signal may be used to maintain one axis of the vehicle in a desired attitude relative to a fixed light source, or may be fed to servomotors which position gimbals to point the optical axis of a tracker to a light source. -
Patent GB-208549-A (GB)
Title: Liquid fuel burner
IPC: F23D11/04
Filed: 1923-12-13
Abstract: 208,549. LinkÚ, C. Dec. 16, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Spray burners; porous block burners.-Liquid fuel is supplied to resilient blades or plates which are alternately flexed and released, and the oil particles so obtained are projected as a mist into a combustion chamber containing a non-homogenous mass such as metal shavings or turnings arranged above a grate or screen. The fuel burns with air and steam entering from a water chamber arranged below the grate and the mass becomes incandescent. The resilient blades may be carried by a rotor or an oscillating support and be flexed by engagement with a stop. Alternatively the blades may be carried by a fixed support and be flexed by a moving device.
Patent GB-1511664-A (GB)
Title: Containers with closures
IPC: B65D50/04
Filed: 1976-10-25
Abstract: 1511664 Safety closures B T REYMESCOLE 25 Oct 1976 [26 July 1975] 31391/75 Heading B8T A container 2 substantially completely shrouded by a resilient plastics safety closure cap 4 is removable from the latter by application of radial squeezing pressure to distort the cap. As shown, an elliptical cap surrounds a circular cross-section container to have friction contact at locations P. Alternatively the container or cap may have axially extending ribs Figs. 4-6 (not shown) or projections, Figs. 7, 8 (not shown) which may or may not cooperate with grooves. The container mouth may additionally be plugged or provided with a safety closure.
Patent GB-925190-A (GB)
Title: Improvements in or relating to a covering system for a helicopter rotor
Inventor: SLATTER BRIAN HUDSON
IPC: B64C27/32
Filed: 1958-10-02
Abstract: 925,190. Gas turbine plant. BRISTOL SIDDELEY ENGINES Ltd. Oct. 2, 1959 [Oct. 2, 1958], No. 31445/58. Class 110 (3). [Also in Group XXIX] A speed governing system for a helicopter rotor arranged to be driven by a gas turbine engine having a free power turbine drivinglyconnected to the rotor comprises two variable restrictors 4, 6 in series in the fuel supply line 1 to the engine, the restrictor 4 being controllable manually by the pilot to select a desired fuel supply to the engine and the restrictor 6 being controllable automatically in response to the delivery pressure of a compressor of the engine and to the rotational speed of the power turbine thereby to modify the selected fuel supply. The restrictor 6 is operated by a servo-mechanism 21 which is in communication with a conduit 11 connected to the compressor of the engine, the pressure being modified by a leak-off valve 9 actuated through a lever, by a centrifugal governor 7 connected to the engine rotor and, by a leak-off valve 15 actuated through a lever 19 by a bellows 18 operable in response to variation in torque of the engine ; a dashpot 20 is provided in order to stabilize the governor. In operation, the engine may be controlled wholly by the manually actuated restrictor 4, the servo-mechanism being isolated by a manually-operable valve 16, or a combination of both restrictors may be used, in the latter case, the governor-actuated valve 9 is arranged to operate between narrow limits as determined by the setting of stops 22, 23; alternatively, the engine may be normally controlled by the valve 9 alone, the stops then being adjusted and/or the loading of the governor spring being varied to give a wide operating range.
Patent GB-1388365-A (GB)
Title: Rotor oil sealing arrangement for a rotary internal combustion  engine
IPC: F01C19/10
Filed: 1973-07-02
Abstract: 1388365 Rotary positive displacement machines NISSAN MOTOR CO Ltd 2 July 1973 [4 July 1972] 31462/73 Heading F1F In a trochoidal-type I. C. engine comprising a piston 20 rotatable on an eccentric portion 24 of a shaft 26 and having an internal chamber 52 supplied with cooling oil via passages 44,50, leakage of oil from chamber 52 is prevented by sealing rings 62, 58, 80 located in annular grooves in eccentric 24 and a member 70 attached thereto. Blow-by gas acts in chambers defined between the sealing rings and the working chamber walls 12, 14 to bias the sealing rings into sealing contact with their grooves, valves 92, 102 acting to connect the blow-by gas chambers to atmosphere when the blow-by gas pressure exceeds a predetermined maximum or falls below a predetermined minimum. The gas chambers are inter-connected by passage 86 and connected to valves 92, 102 by passage 88. The valves are connected to atmosphere via an air cleaner. As shown, the valves comprise a spring-loaded ball valve 94 of adjustable loading for relieving the gas pressure and a spring-loaded lift valve 102 for admitting atmospheric pressure. In Fig.3 (not shown), the atmospheric pressure admission valve (124) is coaxially located within a tubular pressure relief valve (116). The piston 20 has apex seals 32, and sealing rings 42, 56, and is supported by a bearing 22. Toothed members 36, 38 control the piston movement.
Patent GB-777330-A (GB)
Title: Improvements relating to the preparation of polyacrylonitrile fibres, films, tubes and like products
IPC: C08L33/20
Filed: 1953-11-13
Abstract: Polyacrylonitrile fibres, films, tubes and like products having improved dyeing properties and a decreased tendency to become electrostatically charged are obtained by extruding into a liquid hydrocarbon coagulant, such as kerosene, a solution of a composition containing at least 70 per cent by weight of polyacrylonitrile and, in admixture therewith, either another polyvinyl compound or an amine, guanidine, amide or a salt of an amine or guanidine, the amine, guanidine, amide or salt having an aliphatic chain of from 6-30 carbon atoms.  Specified polyvinyl compounds are polyvinyl-chloride, -acetate, -alcohol, -formal and polyacrylates and polymethacrylates.  Addition of polyvinyl alcohol or acetate may be effected by incorporating a copolymer of acrylonitrile and the corresponding monomer into the polyacrylonitrile.  The amines and guanidines may be added in the form of their acid sulphates, phosphates and chlorides, and methylolized fatty amines and fatty guanidines are especially useful, specified compounds being methylolized stearine amine bisulphate and methyloloctadecyl guanidine bisulphate.  Suitable spinning solvents are dimethylformamide and dimethylsulphoxide. The spun materials are stretched, washed in water or steam, the wash water, if desired, containing a weak and volatile acid such as formic or acetic acid or a weak base such as ammonia, and finally dried at below 100 DEG  C. to yield a porous opaque product or at above 100 DEG  C. to yield a translucent, vitreous and more compact product.  Examples are given. Specifications 686,023 and 706,154 are referred to.
Patent GB-1126565-A (GB)
Title: A melt-spinning head for high pressure spinning
IPC: D01D4/08
Filed: 1966-07-13
Abstract: 1,126,565. Melt-spinning head. BARMER MASCHINENFABRIK A.G. 13 July, 1966 [15 July, 1965], No. 31542/66. Heading B5B. A spinning head, which can be fitted to a heater, comprises a pot-shaped housing and filter, distributer and die elements combined to form a unit in the housing, wherein the distributer element 2 is initially inserted into the pot-shaped housing and is screwed into it up to the base of the pot, and the die element 4 is subsequently inserted and is screwed into the housing up to the distributer element, one sealing ring 24 being held between the base of the pot and the distributer, and another, 25, between this element and the die element, in such a way that their sides rest on the distributer element, pot base and die element respectively, substantially without exerting any radial stress on the wall of the pot-shaped housing under the action of the full pressure of the melt. In the embodiment shown this is achieved by the bevelled edges 21, 22 and 23.
Patent GB-341520-A (GB)
Title: Method of connecting directly heated incandescent filaments of electron valves to the power mains
IPC: H01J21/20
Filed: 1929-10-17
Abstract: 341,520. Valve amplifying circuits. LOEWE-AUDION GES., 10, Wiesenweg, Steglitz, and WIENECKE, B., 73, Hµnowerstrasse, Mahlsdorf, both in Berlin. Oct. 17, 1929, No. 31549. Convention date, Oct. 17, 1928. [Classes 39 (i) and 40 (v).] The filaments of thermionic valves, and particularly multiple valves, are heated by alternating current and are connected in series, the filament of each stage is divided into two parts 2, Fig. 1, connected symmetrically about the central filament 1, and the anode and grid circuits are connected to a tapping on a potentiometer 11 across the alternating- current source 10. The filament for the electrode system 3, 5 of the first amplifying stage is in the central position, and each half of the filament of the output stage consists of several wires in parallel. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification, Fig. 1 (cancelled), in which ordinary filaments 1, 2 are connected in series, and a tapping for each set of electrodes 3, 5, 4, 6 is made at different points on the potentiometer. This subject-matter does not appear in the Specification as accepted.