baber/WOPTO huggingface dataset:
Patent GB-741981-A (GB)
Title: Improvements in or relating to an automatic system for lighting and controlling gas burners
IPC: G05D23/275
Filed: 1950-12-14
Abstract: 741,981. Supplying gas to burners. KEITH, BLACKMAN, Ltd., and TAVENER, E. E. Dec. 14, 1951 [Dec. 14, 1950], No. 30587/50. Class 75(1). A gas burner control system includes at least one elongated burner 3, Fig. 1, supplied by a single control means such as an electromagnetic valve 12, an igniter 5 located at one end 4 of the burner and a heat sensitive device 9 exposed to a flame issuing from the other end of the burner, the heat sensitive device being operative to control a gas supply valve, for instance an electromagnetic valve 10 controlling the gas supply to a main burner 1. The elongated burner 3 ignites the spaced nozzles of the main burner 1 and has a continuous slot along which the flame travels from one end to the other. In operation a spring-operated or electrically operated clock 13 closes a contact C to energise a relay A which closes contacts A<SP>1</SP>, A2 to energise the valve 12 supplying the elongated burner 3, and an ignition transformer 15 energising the igniter 5. After a time the heat sensitive device 9 closes contacts to energise the valve 10 supplying the main burner 1. The gas pressure on the outlet side of valve 10 then operates a switch 18 which bridges the heat sensitive device 9 so that when the clock C de-energises the valve 12 supplying the elongated burner and when in consequence the heat sensitive device cools, the valve 10 supplying the main burner remains open. The electrical circuit includes a relay B operating a contact B<SP>1</SP> to energise the valve 10 when the relay A is de-energised, and start and stop buttons 20, 19 for manual operation of the system. In the system shown in Fig. 2 an electromagnetic valve 25 supplying a main elongated burner 21 having a continuous discharge slot is energised at starting through a contact D closed by a clock 27 and after a time a heat sensitive device 23 heated by the flame at the end of the burner remote from an electric igniter 22 closes contacts bridging the clock and the contact D. A switch 30 operated by the gas pressure on the outlet side of the valve 25 is connected in series with the contacts of the heat sensitive device. The clocks 13, 27 give a series of starting pulses.
Patent GB-154868-A (GB)
Title: Improvements in or relating to cutlery grinding machines
IPC: B24B41/06
Filed: 1919-09-19
Abstract: 154,868. Reynolds, H., and Jackson, R. E. Sept. 19, 1919. Work-holders.-In a cutlery-grinding machine, blades 3, Fig. 1, are clamped to the circumference of a rotary work-holder 1 by means of shoes 7 provided with stems 8, which pass through the rim of the work-holder and are acted upon by springs 9 tending to press the shoes towards the holder. Each shoe has two studs 10, Fig. 2, each of which presses the tang of a blade on to a cushioning-device comprising rubber rings 6 around the circumference of the holder. A guidepin 11 prevents the shoe from rotating about its stem. The blades can also be clamped at their points by an encircling-ring or lugs on the holder, in which case they are forged of extra length and the unground part is afterwards cut off. The blades are positioned by the engagement of their bolsters with a circumferential groove 4 or a series of recesses in the work-holder, and they rest in wedge-shaped recesses 2 in the rim of the holder.
Patent GB-649130-A (GB)
Title: Improvements in and relating to generation of electro-magnetic waves
IPC: H01J25/00
Filed: 1946-03-11
Abstract: 649,130. Frequency modulations. BRITISH THOMSON-HOUSTON CO., Ltd. March 11, 1946, No. 30603/49. Convention date, March 15, 1945. Divided out of 649,085, [Group XL (a)] [Class 40 (v)] [Also in Group XL (a)] A high-frequency generator comprises an electron beam which is density-modulated and is also deflected by modulating potentials to oscillate along the length of a slot in a waveguide. In the preferred form, the beam is density-modulated by radio-frequency potentials from a source 45, applied to the grid 44, so that the undeflected beam will pass through slot 51 to impinge on conductor 50 to generate constant radio-frequency currents in the transmission line 52. The currents are frequencymodulated by a signal source 54 which is connected to the deflecting plates 48, 49 to cause oscillation of the beam along the slot 51. The wave-form of each pulse from source 54 should increase from zero at a rate which is proportional to the instantaneous amplitude. It can be applied to communication systems in which radio-frequency pulses are frequency-modulated in accordance with the signals; specific examples of frequencies, duration of pulses &c. are included. In other forms, Figs. 2 and 3 (not shown), the wave-guide may be inclined to the normal axis of the beam, or it may be of the dielectric rectangular hollow-pipe type. Reflection of the wave along the guide is eliminated by impedances.
Patent GB-238176-A (GB)
Title: Improvements in grinding stones or wheels particularly adapted for grinding wood pulp
IPC: B24D5/06
Filed: 1924-12-19
Abstract: 238,176. Norton Co., (Assignees of Greenwood, W. W.). Aug. 6, 1924, [Convention date]. Wheels.-In an abrasive stone or wheel particlarly adapted for grinding wood-pulp and of the kind in which a number of abrasive segments are mounted closely adjacent to each other upon a rotatable member, the segments are made of hard bonded material and a filler is provided in the crevices between the adjacent segments, the filler being of different material from that of the segments or of the bonding-material thereof of such a nature that it will wear away under normal grinding operation at substantially the same rate as the wheel segments wear. The abrasive segments are made of artificial abrasive grains bonded by vitrified ceramic material. The filling-material is of tough and durable material and adapted to protect the corners of the segments from breakage; it may be Babbit or other lowmelting material which is adapted to enter the surface pores of the segments and unite them into an abrading-ring. As shown, Figs. 3 and 4, the segments 16 are mounted on a drum 12 connected to a hub 11 by a central web 13 and radial flanges 14. Each segment has an inner dovetailed portion 18 held in place by interfitting parts carried on the drum 12. Wedge-blocks 20 may be fitted in the grooves 21 between the portions 18 and be operated by means of studs 22 which pass through the drum and are provided with nuts 23 on their inner ends. Each segment is provided with a smooth facing or shoe 28, preferably of lead or other soft metal, to fit against the drum and wedge faces. An alloy composed of 91 per cent. tin, 4.5 per cent. antimony, and 4.5 per cent copper may be run into the crevices between the segments and into the space 30 between the segments and the wedgeblocks 20. The segments are made of artificial abrasive grains such as silicon carbide or crystalline alumina bonded bv a vitrified ceramic material into an open porous structure. A bonding-composition consisting of feldspar, clay, and ground quartz may be emjloyed. For a wide wheel, two or more rows of segmental blocks are arranged with staggered joints.
Patent GB-800144-A (GB)
Title: Metallisable monoazo dyestuffs of the benzene-azo-quinoline series
Inventor: LEGG NORMAN
IPC: C09B45/14
Filed: 1955-10-26
Abstract: The invention comprises dyestuffs of formula: <FORM:0800144/IV (c)/1> where X is OH, COOH or OCH2COOH and Y may be substituted and of A and B one is OH and the other OH or NH2.  They may be made diazotizing an appropriately substituted aniline and coupling, preferably in a neutral or faintly alkaline medium, with the required quinoline component or when X and A are OH by diazotizing an appropriate 2-aminophenol sulphuric acid ester, coupling in a faintly alkaline medium with 6,8 - dihydroxy - or 8 - amino - 6 - hydroxy-quinoline and removing the ester group by treatment with an acid such as sulphuric or hydrochloric acid. Specified diazo components for the first method of preparation are chloro- and nitroanthranilic acids, 4 - chloro -, and ethylsulphonyl - 5 - nitro -, 4,6 - dichloro, 3,4,6-trichloro -, 4 - chloro - 5 - nitro - and 4 - methyl-5-nitro-2-aminophenols, picramic acid, 6-nitro-2 - aminophenol - 4 - sulphondimethylamide, 2-aminophenol - 4 - sulphondi (b  - hydroxyethyl) amide and 5-nitro-2-aminophenoxyacetic acid.  Specified diazo components for the second method are 4 - methyl -, methoxy - and chloro-2-aminophenol sulphuric acid esters.  The dyestuffs, preferably used in a dispersed form, dye artificial textile materials such as cellulose acetate, polyamide or polyacrylonitrile, to give dyeings which should be metallized. Cobalt-, nickel-, chromium- and copper-yielding agents may be used for metallization, the latter being preferred.  Examples are provided illustrative of the preparation of the dyestuffs and their use in dyeing nylon and cellulose acetate in red, brown and orange shades, additional diazo components used to those given above being anthranilic acid, 2-aminophenol, sulphuric acid ester, 4,6-dinitro, 4-methyl-, nitro- and methoxy-, and 4-methyl-5-nitro-2-aminophenols and 2-aminophenoxyacetic acid and its 5-nitro-derivative.  An additional diazo component in the Provisional Specification is 4-chloromethylsulphonyl - 2 - aminophenol.  Specifications 747,872, 777,377, 780,509 and 799,742 are referred to.
Patent GB-731388-A (GB)
Title: Method of making monoglycerides or the like
IPC: C11C3/04
Filed: 1952-12-03
Abstract: Fatty acid monoesters of polyhydric alcohols are made by heating fatty material with an excess of polyhydric alcohol in a reaction mixture containing dioxane and a basic metal soap catalyst at at least 170 DEG  C. and a pressure sufficient to keep a substantial proportion of the dioxane in liquid form.  Fatty materials mentioned are fats, fatty oils and fat-forming acids representative of those specified being stearic and oleic acid and lard, cottonseed and peanut oil optionally hydrogenated. Triglyceride fats are of particular use in the process. Polyhydric alcohols specified are sorbitol, mannitol, polyethylene glycols and glycerol which is preferred.  The catalysts are alkali metal or alkaline earth metal soaps and are generally formed in situ by the addition of the appropriate hydroxide or oxide to the reaction mixture, those specified being sodium, potassium, barium and strontium hydroxides and strontium and calcium oxides. Preferred temperatures are 250-280 DEG  C.  A pressure of 180 p.s.i. is used at about 250 DEG  C. Preferably 5-50 per cent by weight of combined reactants of dioxane is used and at least 1 1/2 , preferably 2 or more, gram equivalent of alcohol per gram equivalent of fatty material calculated as fatty acid.  Dioxane may be removed by flash distillation by releasing the pressure of the reaction mixture to atmospheric, the mixture then being cooled to 150 DEG  C. or lower and the glycerol or other alcohol removed by decantation.  The monoester is preferably concentrated by vacuum distillation with the catalyst still in an active form and catalyst, glycerol, dioxane and di- or triglycerides are recycled. The pressure may be obtained by the use of a slight excess of dioxane so that dioxane vapours exert the required pressure. Reaction times of 15-120 minutes are specified.  The fatty material and alcohol, e.g. glycerols may first be reacted at atmospheric pressure in the absence of dioxane so that alcoholysis is initiated and water removed and the resulting reaction mixture is treated as in the invention.  In examples cottonseed oil is heated for various times with various quantities of glycerol and dioxane in the presence of a strontium soap at temperatures of 250-260 DEG  C. and pressures varying from 130 to 170 p.s.i. to yield the monoglyceride of cottonseed oil.
Patent GB-263476-A (GB)
Title: Improvements in magnetic materials
IPC: C22C19/03
Filed: 1925-08-18
Abstract: 263,476. Standard Telephones & Cables, Ltd., (formerly Western Electric Co., Ltd.), (Bell Telephone Laboratories, Inc.). Aug. 18, 1925. Drawings to Specification. Loaded cables.-A signalling conductor is loaded with a magnetic material which is heattreated. Part at least of the heat-treatment mav be effected on the conductor itself.
Patent GB-1001872-A (GB)
Title: Improvements in and relating to bags
IPC: B65D30/24
Filed: 1961-08-25
Abstract: 1,001,872. Bags. B. SANDERS. Aug. 25, 1961 [Aug. 25, 1960], No. 30787/61. Heading B8K. [Also in Division F3] A flexible bag which is adapted to contain a liquid and may be used for stemming in shot blasting, has a non-return valve at one end formed by inwardly directed strips secured to the bag mouth. The bag may comprise two sheets of thermoplastic material 1 and 4, placed one on top of each other with two narrow strips of material 2 and 3, preferably more flexible than the sheets 1 and 4, placed between them, the sheets being sealed together along seals 5, 6, 8 and 7 which last is interrupted between sheets 2 and 3 to define an aperture 9. The bags may be made from continuous webs with weakening lines through the transverse welds to facilitate separation. The bag may be made from a single strip folded longitudinally, whereby separate strips 2 and 3 and the weld 7 may be omitted. The corners remote from the valve end of the bag may be rounded by a curved seal or by turning the corners on to the bag before sealing. Specification 1,001,873 is referred to.
Patent GB-989751-A (GB)
Title: Variable-gain amplifier
IPC: H03G3/02
Filed: 1962-08-10
Abstract: 989, 751. Automatic control. SIEMENSSCHLUCKERTWERKE A.G. Aug. 10,1962 [Aug. 10,1961], No. 30849/62. Addition to 957,062. Heading G3R. The amplifier arrangement, e.g. for a ship's stabilizer, described in the parent Specification is modified by making the feed back resistor Z fixed instead of variable, and the input resistor R 0  now comprises two variable resistors r2, r3 and a fixed resistor r1 in series. The variable resistors each have a portion a, b of zero resistance, and their rates are linear but different. Their sliders are coupled together at A and move linearly with respect to the independent variable, e.g. ship's speed. It is shown how, by a suitable choice of values for r1. . . r3 and the length of a, b a desired non-linear relationship between the independent variable gain can be obtained. More than two variable resistors may be used.
Patent GB-1287059-A (GB)
Title: Intrauterine device
Inventor: BURNHILL MICHAEL
IPC: A61F6/14
Filed: 1970-06-26
Abstract: 1287059 Intrauterine devices AMERICAN CADUCEUS INDUSTRIES Inc 26 June 1970 31011/70 Heading A5R An intrauterine device comprises a main body 4, Fig. 2, a pair of arms 2 extending from a front end of the body 4, and a pair of legs 5 integral with arms 2 and each having a free end, one of which free ends has a front leading edge part 10 which is flattened and curved to aid insertion of the device, the legs 5 being resiliently movable towards each other. Integral rear arms 3 extend to rear legs 6 terminating in eyelets 9. In a second embodiment, Fig. 7, the main body 31 is elongated having an eyelet 37 formed in a rear end, and rear arms 35 and front legs 32 are highly flexible relative to the body 31 and front arms 30. To insert the device, it is compressed so that in the first embodiment it lengthens with corners 7 coming together, corners 8 coming together, and the legs 6 overlapping with the eyelets aligned, the second embodiment being compressed for insertion so that arms 30 fold together and arms 35 fold towards the body 31. The compressed and elongated device is inserted in a tube from which it is pushed out by a device (21), Fig. 3 (not shown), having a hook engaging in eyelets 9 or eyelet 37. The intrauterine device is preferably made of plastics material.
Patent GB-318039-A (GB)
Title: Improvements in or relating to testing machines
IPC: G01N3/08
Filed: 1928-10-26
Abstract: 318,039. Avery, Ltd., W. & T., and O'Driscoll, B. L. Oct. 26, 1928. Testing physical qualities of materials.-Comprises a machine for testing more especially chains and anchors of the type in which a movable frame carrying a cross-head is pushed forwardly when applying the straining force, and consists in forming the frame in two readily disconnectible parts one of which is adapted to have secured' thereto a crosshead or anvil which is adapted to receive the flukes of an anchor. The frame 5, which is pushed by a hydraulic ram, slides by means of rollers 8 on rails 9 and carries a crosshead 4 to which one end of a chain is attached, the other end being attached to a crosshead 6 connected to the usual steelyard device 7. The crosshead 4 is mounted on a carriage 13 and may be adjusted relatively to the frame and clamped. To test an anchor the bolts 11 are uncoupled and the long part of the frame 5 is moved to the left, a crosshead or anvil being secured to the short part 10 arranged to receive the flukes of an anchor.
Patent GB-980171-A (GB)
Title: Improvements in electroluminescent devices
Inventor: JEFFREYS DENNIS CLIFFORD
IPC: H05B33/20
Filed: 1960-09-08
Abstract: An electroluminescent device incorporates a slow-acting water-absorbent material in the phosphor layer, the material having a substantial residual capacity for binding hydroxyl groups after the processing treatments involved in the manufacture of the device have been carried out.  The material can be a sterically hindered isocyanate such as 3 : 51 : 5 : 51-tetramethy 4 : 41-di-isocyanate diphenylmethane. Other examples of isocyanates are stated. The material is preferably within the range of 1/4 to 2% by weight of the phosphor.  The device can be made by forming a transparent first electrode pattern on one face of a transparent plate, depositing over the pattern a phosphor layer incorporating a small proportion by weight of the phosphor of a slow-acting water-absorbent material, forming on the phosphor layer a layer of insulating material of high dielectric constant, forming on the insulating layer a second electrode pattern, applying an insulating backing plate against the second electrode pattern, removing as much moisture as practical and sealing the device against the ingress of moisture.  The first electrode pattern can be formed by evaporating on plate glass a transparent layer of bismuth oxide/gold and, if required, etching with potassium cyanide, using printed circuit techniques. The phosphor can be a suspension in 1% high viscosity nitro-cellulose dissolved in butyl acetate and containing the water-absorbent material and can be spin-coated over the electrode pattern.  The insulating layer can be of melamine and alkyd resins filled with barium titanate applied over the phosphor layer, using butyl alcohol as solvent, and baked. The second electrode pattern can be formed by evaporating a layer of copper on to the insulating layer and, if required, etching with ferric chloride, using printed circuit techniques involving aqueous photo-resists.  The backing plate can be of glass and the assembly can be sealed with wax.  The electrodes can be uninterrupted conducting layers or a multitude of crossed parallel conductors.
Patent GB-1209079-A (GB)
Title: Copolymer mixtures
Inventor: TARBOX ALBERT EDWARD
IPC: C08L23/02
Filed: 1968-06-28
Abstract: 1,209,079. Terpolymer/copolymer blends. UNION CARBIDE CORP. 28 June, 1968 [30 June, 1967], No. 31078/68. Heading C3P. A polyblend comprises 75-25% of an olefin/ alkylacrylate/alkali metal acrylate terpolymer, wherein the olefin has from 2-8 carbon atoms, the alkylacrylate from 4 to 14 carbon atoms and comprises 1 to 35% of the terpolymer, and the alkali metal acrylate comprises 1 to 42% of the termpolymer, and from 25-75% of an olefin/acrylic acid copolymer having a melt index of 0À001-500 dg/minute wherein the olefin has from 2 to 8 carbon atoms and the acrylic acid comprises from 2 to 50% out of the copolymer. The preferred olefin is ethylene, and the terpolymer may contain at least 50% of the olefin. Suitable alkyl acrylates are methyl, ethyl, or butyl acrylate, and suitable alkali metal acrylates are those of sodium and potassium. In the examples a copolymer of ethylene and ethyl or butyl acrylate is partially saponified with sodium or potassium hydroxide to form a terpolymer comprising ethylene/ ethyl or butyl acrylate/sodium or potassium acrylate, and this terpolymer is blended with a copolymer comprising ethylene/(meth)acrylc acid. The secant modulus and tensile strength of the resultant blends are measured.
Patent GB-1429669-A (GB)
Title: Tube pumps
IPC: F04D3/02
Filed: 1973-06-29
Abstract: 1429669 Archimedean screw pumps SIMONHARTLEY Ltd 30 May 1974 [29 June 1973] 31133/73 Heading F1C A pump, e.g. for irrigation, comprises a cylindrical tube 11 rotatably containing a screw 15, the tube being pivotally mounted about a horizontal axis to a fixed bracket 20 and having at its opposite end a float 22 and a leg 24 which prevents the tube from contacting the bed of water channel W. Means 23 enable the length of float arm 21 to be adjusted.
Patent GB-392450-A (GB)
Title: Improvements in edge reinforcements for paper and like sheets
IPC: B31F5/08
Filed: 1932-11-04
Abstract: 392,450. Strengthening edges of sheet material. SCHOENING, H., 23, Franziskanerweg, Frohnau, Berlin. Nov. 4, 1932, No. 31174. Convention date, Nov. 4, 1931. Drawings to Specification. [Class 16.] The edge of a paper or like sheet is reinforced by means of a composite strip consisting of a strip of thin paper and a strip of woven or like fabric attached to the sheet by means of adhesive. The composite strip may be doubled over the edge of the sheet, or a separate strip may be applied on each side, and to assist in the retention of the strip or strips the sheet, especially when made of oil-paper, is perforated near its edge. The thin paper and woven fabric may be united together and to the sheet by a solution of guttapercha, rubber, or the like and benzene or benzol ; this solution remains tacky for a long time without requiring heat or moisture. Specification 5861/86, [Class 16, Books], is referred to.
Patent GB-440324-A (GB)
Title: Process for the treatment of wood for obtaining a dry fuel
IPC: C10B53/02
Filed: 1934-05-18
Abstract: 440,324. Materials for making coke. SPATZ, R., and SENNAC, R., 10, CitÚ Condorcet, Paris. May 18, 1934, No. 31194 /35. Convention date. Dec. 30, 1933. Divided out of 441,472 and addition to 438,664. [Class 55 (ii)] The process described in the parent Specification is modified by the addition of mineral or vegetable tars or oils to the pulverized product of the first distillation or their substitution for the condensation products of that distillation the quantity employed being such that the product remains in granular form. The second distillation, up to about 1000‹ C., of the compressed material is effected as in the former process.