baber/WOPTO huggingface dataset:
Patent GB-1049383-A (GB)
Title: Ambient light trapping filter and method of making
IPC: H01J29/18
Filed: 1963-06-04
Abstract: 1,049,383. Filters. DOUGLAS AIRCRAFT CO. June 4, 1963 [June 4, 1962], No. 22241/63. Heading G2J. [Also in Divisions G1 and H1] A filter as in Specification 1, 039, 151 in which a grid of lines is provided on both surfaces of a transparent sheet and a clear transparent sheet is interleaved between the sheets carrying the grid lines. As shown, a transparent sheet 10 has grid lines printed in registry on both surfaces by rollers 28, the registry being checked by a collimated beam of light 42 which passes through a selected area of the sheet and the intensity of which is measured on a photo-electric instrument 50. The filter is then formed by building alternate layers of sheets carrying the grid lines and clear sheets, the registration of the grid lines being checked in the manner set out above. The completed filter may be moulded to match the curvature of a cathode ray tube and be fixed thereto with a transparent cement (Fig. 6 not shown).
Patent GB-881095-A (GB)
Title: Improvements in hydraulic gates
IPC: E02B7/42
Filed: 1959-06-30
Abstract: 881,095. Sluice gates. LINDSAY, R. A. G. June 30, 1959, No. 22368/59. Class 68(2). A gate for automatically controlling the water level in a reservoir comprises a plate 13 with triangular side panels 14, 14 and a top plate 15. The gate is carried by brackets 16 pivoted at 17 to buttresses 18. The sealing faces of the gate close on to the abutments 12, the surfaces 12a of which make an angle of 30 degrees with the floor of the reservoir 10. When the depth of the impounded water is "H", then the direction of the resultant force on the gate passes beneath the pivot 17 and produces a moment tending to close the gate. When the depth of water increases so that the direction of the resultant force is above the pivot 17 a turning moment is produced which opens the gate.
Patent GB-1215034-A (GB)
Title: Roller skate footwear
Inventor: ALDRIDGE ALAN ROY
IPC: A43B5/16
Filed: 1968-05-10
Abstract: 1,215,034. Roller skate. A. R. ALDRIDGE. 11 Aug., 1969 [10 May, 1968], No. 22399/68. Heading A6D. The sold and heel portions of a shoe 10 are each provided with a bore 14 receiving an axle 15 at each end of which is secured, either permanently or removably, a wheel 17 to form a roller skate. The wheels may be fixed with respect to the axle, or may each be provided with two ball bearings 23 and 24, those outer races are held by the tyre 22, and inner races are disposed on the axle 15 between spacer bushes 20 and 27 and securing nut 21. The bores 14 may be lined with metal tubes 14.
Patent GB-661252-A (GB)
Title: Improvements in the preservation of latex
IPC: C08C1/06
Filed: 1949-08-30
Abstract: 661,252. Preserving natural rubber latex. UNITED STATES RUBBER CO. Aug. 30. 1949 [Sept. 11, 1948], No. 22498/49. Class 70 Natural rubber latex is preserved by adding formaldehyde and a condensation product of formaldehyde and an alkali metal salt of an aryl sulphonic acid. An amine from the group consisting of di- and tri-methylamine, di- and tri-ethylamine and morpholine may also be added. The amount of formaldehyde is preferably from 0.1 to 1.0 per cent so that the pH is reduced to about 5.5 to 6.8. The preferred alkalimetal salt is sodium naphthalene sulphbnate and the condensation product derived therefrom is preferably added in an amount of 0.05 to 1.0 per cent.
Patent GB-1402428-A (GB)
Title: Injection syringes
IPC: A61M5/20
Filed: 1972-05-12
Abstract: 1402428 Hypodermic syringes PFIZER LTD 8 May 1973 [12 May 1972] 22522/72 Heading A5R A hypodermic syringe comprises a cylinder assembly 10 and a piston assembly 11, relatively slidable against the action of a spring 12, one assembly having a hand-grip 43 and a socket 19 to receive the neck of a fluid-container 13, the cap of which is pierceable by a hollow tapping needle 26 whereby fluid can flow through a passage 28 into the space between the piston 39 and one end of the cylinder 17, and thence, via a non-return valve 37, into the needle 14, and the other assembly carrying the needle 14 and providing a passage 40, from the piston to the needle, in which is located the valve 37, this assembly also carrying a finger-piece or pieces 44, by which, in co-operation with the hand-grip, the two assemblies may be manually moved relatively to one another to inject the fluid. The needle 14 is integral with a collar which is secured to the piston assembly by a sleeve 35a. The socket 19 is co-axial with a larger socket 18 which receives the container body and both sockets are rearwardly inclined to the vertical at an angle of 30‹. The socket 19 is split to provide fingers 21 resiliently gripping the container-neck and the socket 18 has a longitudinal slit 32 through which the level of the container-contents can be observed. The sockets and hand-grip 43 are 'moulded integrally with a body 15 which contains also a passage 30 leading to atmosphere, through a non-return valve 31, and having a venting needle 27 which pierces the containercap. In another embodiment (Fig 2, not shown) the piston is stationary on the hand-grip assembly, and the relatively-movable cylinder assembly carries the finger-piece and needle.
Patent GB-298331-A (GB)
Title: Improvements relating to electrical welding machines
IPC: B23K11/31
Filed: 1927-08-29
Abstract: 298,331. Sadler, J. W., Longhorn, A., and Sadler & Co., Ltd., J. W. Aug. 29. 1927. Welding.-In an electric welding machine the actuation of a control member for causing the electrodes to grip the work operates mechanism to close a switch through a flexible connection and switch lever, further actuation of the control member then disengaging trip mechanism to allow a spring to open the switch, and on release of the control member it is returned to initial position together with the trip mechanism. The movable electrode arm a<2>, which co-operates with an adjustable fixed arm a<1>, is provided with an insulated extension a<4> engaged by a spring a<5> on a shaft a<3> which is connected to a weighted treadle lever E. The tension of the spring is adjusted by nuts a<6>. The shaft a' carries a stop a<7> in which is mounted a pivoted screw f. This screw carries an adjustable disc f<1> held in position by a nut f<2> and is pressed by a spring f<3> into contact with a bracket f<4>. Slidably mounted in the bracket is a trip member f<5> connected by a link f<6> and a Bowden wire f<7> to a switch lever F. The forward end of the lever may be extended so that the switch may be operated by hand. The rear end of the lever is pivoted to a rod f<9>, which may be raised in guides on a switch board against the action of an adjustable spring f<12>. The rod carries an insulated bracket having a pair oj spring-controlled pivoted contacts f<16> for engag ing with a pair of fixed contacts f<18> on the switch board. On depressing the treadle the electrodes are brought into contact with the work. Further pressure on the treadle causes compression of the spring a' to grip the work between the electrodes whereupon the shift a<3> is raised and the disc f raises the trip member f<5> and through the Bowden wire and lever F operates the switch. Wher the weld is completed the treadle is further depressed so as to release the disc f<1> from the trip member which is returned by the spring f<12> to open the switch. The treadle is then released to bring the shaft a<3> into initial position.
Patent GB-1014914-A (GB)
Title: Method of preparing quinazolones
IPC: B44F1/08
Filed: 1964-06-01
Abstract: 2 - Alkyl - 3 - (alkyl, aryl or aralkyl) - 4 - quinazolones are prepared by heating a mixture of an o-amino aromatic carboxylic acid in a normally liquid organic solvent-diluent inert to the reaction, and 1 to 1 1/2 moles of aliphatic carboxylic acid anhydride having 2-12 carbon atoms at a temperature below 60 DEG  C., adding from 2-2 1/2 moles of primary aliphatic, aromatic or araliphatic amine, the aromatic amine when containing a condensed ring system bearing the amine group in the b -position thereof, in the presence of 1-3 moles of phosphorus trichloride, phosphorus oxychloride or thionyl chloride as condensing agent and heating the reaction mixture at from 80 DEG C. to reflux temperature.  The preferred acid anhydrides are acetic, propionic, butyric and hexanoic anhydrides.  Reference has been directed by the Comptroller to Specifications 843,073 and 936,902.
Patent GB-1135465-A (GB)
Title: Improvements in or relating to telescopic towers
IPC: E04H12/18
Filed: 1966-05-20
Abstract: 1,135,465. Telescopic tower cranes. RICHIER SOC. ANON. 20 May, 1966 [21 May, 1965], No. 22650/66. Heading B8B. A tower crane has a telescopic tower with an upper part 14 which reciprocates within a lower part 13 in which the upper part has an upper portion 8 of smaller cross section than a lower portion 9. The latter mates with the lower part in such a way that the upper part is supported throughout its range of movement. The two parts of the tower may be either square or triangular in cross-section. Figs. 7 and 8 (not shown), illustrate diagrammatically two constructions of the upper part of the tower.
Patent GB-1132956-A (GB)
Title: Binder system for magneto recording medium
IPC: C08L27/06
Filed: 1966-05-20
Abstract: 1,132,956. Magnetic compositions. AMPEX CORP. 20 May, 1966 [24 May, 1965], No. 22677/66. Heading H1H. The binder for coating magnetic particles on a backing comprises a vinyl acetate-vinyl chloride copolymer mixed with a polyurethane. The copolymer may constitute 10-77À5% of the binder, and may contain 91% chloride, 3% acetate, and 6% alcohol. The polyurethane may be obtained by reacting 2,4-toluene-, hexamethylene-, or p-p<SP>1</SP>-diphenylmethane-diisocy - anate with adipic or phthalic acid and glycerin, hexanetriol, or butanediol-1,4. The coating may contain 70-80% b.w. magnetic particles. In the examples, Fe oxide is dispersed in solvents and combined with the resins solution in a ball mill; the mixture is then coated on to a polyester base and dried at 175‹ and 225‹ F.
Patent GB-1135319-A (GB)
Title: Method of producing stereospecific rubbery polymer
Inventor: FORMAN LAWRENCE EDWARD
IPC: C08F36/04
Filed: 1966-05-20
Abstract: 1,135,319. Preparing stereoregular diene polymers. FIRESTONE TIRE & RUBBER CO. 20 May, 1966, No. 22699/66. Heading C3P. Stereospecific rubbery polymers containing at least 85% 1,4 structure are produced by polymerizing isoprene, butadiene-1,3, or piperylene using an organolithium compound (which will react with water to liberate hydrogen) and in the presence of a carbonyl compound which is an aliphatic or aromatic ketone, aldehyde or ester, said carbonyl compound being present in an amount sufficient to provide 0À1 to 0À9 mol. of carbonyl oxygen per mol. of catalyst, the polymerization being effected in the absence of oxygen other than that in the carbonyl compound, and the amount of the catalyst being sufficient to provide 0À00002 to 0À05 grams of active lithium per 100 grams of monomer, the polymer produced having a lower molecular weight than polymer produced in the absence of the carbonyl compound. The lithium compounds may be lithium hydrocarbons, adducts of lithium with polynuclear aromatic compounds, and also mixtures of an organolithium compound with a lithium alkoxide. Small amounts of hydrocarbon vinyl monomers, e.g. styrene, α-methyl styrene, and vinyl toluene, may be copolymerized with the specified dienes. The polymerization may be carried out in the presence of an inert solvent. The examples relate to the polymerization of (1) isoprene using a butyl lithium/acetone catalyst and pentane as solvent, and (2) butadiene using a butyl lithium/crotonaldehyde catalyst and nhexane as solvent.
Patent GB-228213-A (GB)
Abstract: 228,213. White, A. E., (Goodrich Co., B. F.). Aug. 20, 1923. Drawings to Specification. Paints; varnishes. - A coating-composition comprises pyroxylin, ethyl acetate, alcohol, benzol, and a softener such as " Pierco Blendoyl," or other vegetable oil such as castor oil. A mineral filler such as Kaolin may be added. Cellulose acetate or viscose together with a softener may also be used.
Patent GB-815742-A (GB)
Title: Lake-like brightening agents
IPC: D06L4/60
Filed: 1955-08-08
Abstract: Lake-like optical bleaching agents are obtained by reacting water-soluble optical bleaching agents containing a sulphonic or carboxylic acid group, or their water-soluble salts, with basic condensation products of formaldehyde and compounds containing the group N-C-N, e.g. dicyandiamide and guanidine salts.  Reaction may be effected by mixing aqueous solutions of the reactants at ordinary or moderately elevated temperature.  In the examples: (1) a brightening agent of the formula <FORM:0815742/IV (a)/1> is reacted with a dicyandiamide-formaldehyde condensation product, the lake is dispersed in water with the aid of a polyglycol ether of benzyl-p-hydroxydiphenyl, and the aqueous dispersion is mixed with a conventional solution of cellulose and ammoniacal copper oxide and the solution is spun; (2) a brightening agent containing sodium sulphonate groups and prepared as described in Specification 787,429 is treated as in (1) and added to an alkaline cellulosexanthate solution before spinning; (3) the brightening agent is another compound containing sodium sulphonate groups and the condensation product is prepared from a guanidine salt and dicyandiamide with formaldehyde, as described in Specification 721,238, [Group IV (c)].
Patent GB-1040055-A (GB)
Title: Production of linear segmented polyurethane and polyurea elastomers
IPC: C08G18/10
Filed: 1963-06-07
Abstract: Linear segmented polyurethane and polyurea elastomers are prepared by reacting a difunctional -NCO terminated prepolymer (obtained by reaction of a polymer of M.W. 600-8000 having end groups containing active hydrogen with an organic diisocyanate) with a difunctional chain extender and a monofunctional chain terminator, the mol. percentage of chain terminator being from 6.8 x (z)-2.224 to 17 x (z)-2.224, and the mol. percentage of the chain extender being 100 + 8.5 x (z)-2.224 minus the mol. percentage of chain terminator, (z) being the intrinsic viscosity of the polymer produced and having a value between 0.6 and 1.2 and all the mol. percentages being based on the mols. of difunctional isocyanate in the reaction mixture.  The chain extender may be hydrazine or a diamine.  The chain terminator may be a secondary monoamine, e.g. diethylamine, butylmethylamine, diisobutylamine, di-n-butyl amine, allylethylamine, dicyclobutylamine, piperidine or ethyleneimine.  In Example (1) a prepolymer prepared by reaction of 2 mols. of diphenylmethane 4,41-diisocyanate with 1 mol. of polytetramethyene-ether glycol was dissolved in N,N-dimethylacetamide and reacted with a mixture of hydrazine (in water) and diethylamine (in dimethylacetamide).  The diethylamine used was 10 mol. per cent and the hydrazine 96 mol. per cent based on the -NCO terminated polyether, and the resulting polymer had an intrinsic viscosity of 1.2.
Patent GB-215700-A (GB)
Title: Improvements in motor vehicles
IPC: B62D29/02
Filed: 1923-09-12
Abstract: 215,700. England, E. C. G. Sept. 12, 1923. Seats and seat backs, arrange. ment and disposition of. - In motor vehicles, the bottom or floor 17 carrying the seats 18, 19 and footboard 20 is mounted directly on the chassis, while the remaining portions of the body are carried on longitudinal members attached to the chassis independently of the seats &c.
Patent GB-701471-A (GB)
Title: A process and apparatus for the purification of benzene
IPC: C07C7/148
Filed: 1951-10-02
Abstract: <PICT:0701471/IV(b)/1> Crude benzene or light oil is first practically freed from mono- and di-cyclopentadiene and then treated with oxygen and water or steam at elevated temperature and pressure to convert impurities to higher boiling compounds from which benzene is separated, preferably by distillation.  The crude benzene may be fractionated using a final temperature of 170-175 DEG C. at the bottom of the column to remove a fore-runnings containing cyclopentadiene and other impurities, with some benzene. Dicyclopentadiene is converted at this temperature to cyclopentadiene, removed in the fore-runnings, and polymers of high-boiling point.  The bottom product, and also the benzene fraction obtained by rectification of the fore-runnings may be treated with oxygen or enriched air, and water, preferably containing an alkali such as lime, to give a pH above 7.  The reactor may contain both liquid, aqueous and benzene, and vapour phases. Oxidation catalysts, e.g. organic salts of manganese, may be present. The benzene may be drawn off from either the liquid or vapour phase, separated from water, and rectified.  It may be further purified by crystallization.  The continuous oxidation process may be effected using a pipe system, externally or internally heated by high pressure steam.  In an example, the oxidation is effected in an autoclave using a 5:1 air-oxygen mixture and superheated steam, at 220 DEG C. and 55 atm, the reaction time being 2 hours.  A suitable apparatus comprises a container 1 having a packed column 5 which is filled with water to level 15, and benzene above it to level 16.  Superheated steam is fed through pipe 18, benzene freed from mono- and di-cyclopentadiene through pipe 21, and oxygen or air through pipe 23.  Products are withdrawn through pipe 9.
Patent GB-239062-A (GB)
Title: Improvements in or relating to locks or fastenings for attache cases and the like
IPC: E05B65/50
Filed: 1924-09-30
Abstract: 239,062. Hill, W. J. Sept. 30, 1924. Hasp fastenings for attachÚ &c. cases. The bolt-operating knob c is blocked against accidental retraction by a plate a rotatably mounted on a fixed axis behind the knob and having a slot b<2> adapted to receive the pin of the knob so that when the plate is turned through a right-angle from the position shown the knob cannot be moved. Lugs a<1> on the plate are provided for turning it and projections a<2> at the back thereof engage slots b<1> in the front of the casing. A cranked bolt projecting through the casing to lie over the hasp as described in Specification 205,740 may be used.
Patent GB-780109-A (GB)
Title: Improvements in or relating to electronic time-base generators
IPC: H03K4/43
Filed: 1955-08-10
Abstract: 780,109. Saw-tooth generating circuits. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Aug. 10, 1955 [Aug. 19, 1954], No. 23080/55. Class 40 (6). A time-base generator comprises a source of sweep voltage 5, 6, 7 coupled to a deflection coil 1, through a cathode follower valve 2, and a linearizing negative feed-back circuit comprizing a differentiating circuit 13, 10 connected between the cathode of the cathode follower and the grid of a valve 9 connected across the source of sweep voltage. As shown, the source of sweep voltage comprises a capacitor 7 which is charged through a resistor 6 and discharged through a resistor 5 and the amplitude and velocity of the sweep generated in the deflection coil is adjusted by means of a potentiometer 12 which varies the cut-off bias on valve 9 and so determines the voltage level at which the negative feedback becomes effective.
Patent GB-748696-A (GB)
Title: Process of making abrasive phenolic resin mixes
IPC: C08J5/14
Filed: 1952-09-15
Abstract: Moulding powders for making shell moulds or abrasive articles, e.g. grinding-wheels, and comprising granules of sand &c. wetted with a plasticizer and coated with a partially cured phenolic resin are prvented from sticking together by fluidizing the granules in a current of air or other gas at temperatures from 40-200 DEG  C.  In making the mixture sufficient plasticizer, e.g. furfural or liquid reactive phenolic resin is added to pick up nearly all the abrasive powder leaving 1 per cent free powder and the powdered phenolic resin is then added.  In examples mixtures comprising 22.4 lbs. 24-grit size alumina, 0.52 lb. liquid resin and 1.78 lbs. solid resin are specified.  This mixture is fed successively through hoppers 1, 9 and thence, by means of pressure supplied by air fed through line 21, through glass tube 12 and heater 13 to the upper chamber 31 of the fluidizing apparatus comprising a steel cylinder 35 divided into upper and lower chambers 31, 39 by a porous plate 41 and provided with electric heating coils 36.  The lower chamber is cone-shaped and has an inlet pipe for the fluidizing gas while above the chamber 31 is provided a glass tube 73 in which the extent of the fluidizing action may be observed and from which passes a pipe 89 to a centrifugal separator 93 in which any powder carried over by the fluidizing gas is separated, the gas being vented through a receiver 98 containing water.  Fluidizing gas is supplied under pressure from the mains 29, the pressure being sufficient to give the required differential pressure for the feed at points 14 and 43 respectively. The air <PICT:0748696/IV(a)/1> is first dried by passage through a glass wool filled trap 26 and then passes to the T-piece 22 where the supply is divided to feed the lines 21 and 68.  The latter supply passes through a cylinder 61 containing a dehydrator, e.g. calcium sulphate, and thence through a ceramic pipe 48 fitted with resistance heating wires into the base of a cylinder 47 from the top of which the dried air passes through an electrically heated tubular heater 55, 56 into the base of the cone-shaped chamber 39.  A mercury pressure gauge 103 connected on the one side through pipes 105, 106 to the upper chamber 35 and on the other side through pipes 102, 101 and T-union 100 to the lower chamber 39 enables the pressure differential to be controlled in conjunction with the temperature limit specified read off at thermometers 111 and thermocouple 109 that the level of the fluidized mixture is controlled to rise to the level of the outlet 77 from which catalyst is continually withdrawn through line 78 to receiver 80.
Patent GB-201431-A (GB)
Title: Improvements in writing and drawing devices
IPC: B43L1/12
Filed: 1922-08-25
Abstract: 201,431. Deutsch, H. Aug. 25, 1922. Writing-tablets.-In writing and drawing devices of the kind consisting of a sheet of transparent or translucent paper, oiled silk, or the like, superposed upon a base-plate of cardboard coated with paraffin wax, beeswax, or the like, the writing being produced by a colourless style or pencil, a covering and protecting sheet of transparent material such as celluloid, cellulose acetate composition, or tracing cloth is provided to receive the pressure of the writing point and transmit it to the surface beneath, and means are provided to obliterate the marks or writing by separating the paper and its protective sheet from the base-plate. The paper sheet b, Fig. 2, and its transparent covering sheet c may be joined at their upper edges g to the base-plate a, or the sheets b, c may be united, for example by colourless glue, to form a single sheet which is joined at its upper edge to the base-plate. Fig. 5 shows a base-plate a<1> arranged in a pocket f within a frame i and covered by the paper and protective layer c<1>. The pocket f and frame i are secured together at their upper and lower edges g, m, and a thin slide n, for example made of wire, is adapted to be moved down and up again between the pocket and the frame. In a modification, the pocket and frame are secured together at the upper edge g and one side h and a thread with one end secured within the corner p of the frame is drawn down between the lower face of the paper and the base-plate a<1>.