baber/WOPTO huggingface dataset:
Patent GB-803911-A (GB)
Title: Improvements in or relating to saturable electromagnetic devices
Inventor: TERRY VICTOR JOHN
IPC: H01F29/14
Filed: 1954-05-12
Abstract: 803,911. Inductors; automatic regulation. STANDARD TELEPHONES & CABLES, Ltd. May 20, 1955 [May 12, 1954], No. 13880/54. Classes 38 (2) and 38 (4). [Also in Groups XXXVI and XXXIX] A saturable reactor device comprises a magnetic core 1 having a first limb 2 with an energizing coil 3 thereon which coil 3 is fed with direct current to saturate the limb 2 with flux, and a second limb 4 provided with means to ensure that the limb has substantially constant reluctance and having such a cross-sectional area that the limb is not saturated by the flux from the limb 2 whereby a substantially constant magnetomotive force is developed across the limb 4. The incremental reluctance of the saturated limb 2 is high whilst the reluctance of the unsaturated limb 4 is low relatively thereto. The means producing a constant reluctance in the limb 4 may be a gap 5 which may be air or a compressed magnetic dust member may be inserted in the gap. Alternatively one or more such gaps may be provided at any desired situation in the limb, or the limb may be constructed of compressed magnetic dust without a gap. A compensating coil 6 may be placed on the limb 4 to compensate for any variations in the direct current supplying the energizing coil 3. In order to compensate for temperature variations the gap 5 may have associated therewith a magnetic armature carried by a bi-metal element. The core structure is built of laminations and may be either of the form shown in Fig. 4 or Fig. 5. The device shown in Fig. 1 shows an apparatus whereby the current in a load L fed from an alternating current source S may be kept constant. A pair of limbs 7, 8 are provided which are normally saturated by the flux from the limb 2. Coils 9, 10 are placed on these limbs and are oppositely connected in series with the load L. During one half-cycle of the source S one of the limbs becomes de-saturated thereby increasing the impedance of the coil on that limb whilst in the next half-cycle the conditions apply to the other limb. Thus the impedances of the coils 9, 10 are controlled such that the current in the load L is maintained constant. Other applications are described for measuring peak voltages and for magnetic amplification. Specification 650,015, [Group XL (c)], is referred to.
Patent GB-402343-A (GB)
Title: Improvements in warp stop-motions for looms for weaving
IPC: D03D51/28
Filed: 1933-05-12
Abstract: 402,343. Loom warp stop-motion. KAUFMANN, J. J., 8210, High School Road, Elkins Park, Pennsylvania, U.S.A. May 12, 1933, No. 13901. [Class 142 (i).] Detector healds 30 made from flat strips of metal or wire, are provided with a slot 34, Fig. 3, which is independent of those provided for the ordinary guide rods 14, 15, to accommodate a compound contact bar 17-19 forming part of an electric circuit. The engagement of a heddle with the contact bar, when a warp thread breaks or becomes unduly slack, effects stoppage of the loom.
Patent GB-413845-A (GB)
Title: Improvements in or relating to door closing apparatus
IPC: E05F3/06
Filed: 1933-05-12
Abstract: 413,845. Door checks ; pivots. ADAMS & SON, Ltd., J., WEBBERLEY, J. A., KELTING, G., and READE, C., 105, Union Street, Southwark, London. May 12, 1933, No. 13913. [Classes 65 (i) and 65 (ii).] The closing movement of a door which swings on a downwardly-projecting hinge pin at the top corner is checked or braked by a check unit, without any door-operating mechanism, which incorporates the top pivot. In the form shown, the check unit is fitted in the top corner of the door, and comprises a horizontal cylinder 48 with piston 47 driven from a crankshaft having a large upper end 44 which forms the pivot for the door, being fixed relatively to the door frame by a pin 59. The cylinder 48 is provided with an oil inlet passage controlled by a ball valve 50<c>, an outlet passage controlled by a screw valve 49, and a tapered groove 54 at its outer end to reduce the checking effect at the commencement of closing ; the piston covers the outlet port before reaching the end of its stroke so as to give a strong final check, the oil being only able to escape by leaking past the piston. The valve 49 projects at its upper end into a chamber 50, which receives any oil leaking past it, and is adjusted by a toothed disc 52 which projects slightly from the sides of the door. In the case of a single-acting door, the crankshaft is arranged so that the piston has not reached dead-centre when the door is fully closed, so that the check is effective through the whole closing movement. To ensure correct positioning of the crankshaft, the pin 59 fixing it relatively to the door frame is made of unsymmetrical cross-section, splined or otherwise, or formed of two pins of different size, so that only one relative position of the parts is possible. The pin 59 is carried on a member 58 mounted for vertical sliding movement, under the action of a screw 60, on guides 57 on a plate 56, so that the pin can be raised out of engagement with the crankshaft 44 when it is required to dismount the door ; the plate 56 is mounted for longitudinal adjustment on a plate 55 fixed to the door frame, the adjustment being effected by a screw 64 actuated by tommy-bar from below. The plate 55 may form part of an L-shaped member fixed to the upright of the frame. For doors opening in one direction only, in which the pivotal axis is offset from the centre line of the door, the crankshaft 44 may be gear-driven from the pivot pin, which is fixed to the door frame. The device may be used in conjunction with any independent driving unit fitted on the door, particularly such a device as is described in Specification 413,846.
Patent GB-500244-A (GB)
Title: Improvements in or relating to spectacles and eyeglasses
IPC: G02C11/02
Filed: 1938-05-11
Abstract: 500,244. Spectacles. BRUMER, V. May 11, 1938, No. 14018. [Class 97 (i)] Ornamental attachments d are applied to the sides a of spectacles and are wholly or in part secured by the rivets &c. e by which the sides are secured to the hinges c. As shown, two hinge rivets are used for securing the inner end of the attachment, and the outer end is secured by an additional rivet &c. f. Alter. natively only one of the hinge rivets may be utilized, the other terminating beneath the mounting.
Patent GB-544049-A (GB)
Title: Improvements in and relating to the preservation of wood and like organic substances by impregnation
IPC: B27K3/32
Filed: 1940-09-09
Abstract: 544,049. Preserving wood. BOLIDENS GRUVAKTIEBOLAG. Sept. 9, 1940, No. 14025. Convention date, Sept. 9, 1939. [Class 140] Wood is preserved by impregnation with an aqueous solution or paste comprising a ferrous salt and arsenic acid in substantially equimolecular proportions, so that on drying the arsenic acid is wholly precipitated as ferric arsenate. The ferrous salt may be ferrous sulphate, chloride or acetate. A reducing agent such as a mixture of iron powder and sulphuric acid may be added to stabilize the solution, which may also contain tartaric or oxalic acid or their alkaline salts. The solution may contain 0.66 to 1.50 mols. of ferrous salt per mol. of arsenic acid.
Patent GB-738616-A (GB)
Title: Preparation of alpha-halo-nitroacetophenones
IPC: C07C49/16
Filed: 1953-05-20
Abstract: a  - Halo - nitroacetophenones are made by hydrolysing an a  - nitrophenyl - b  - halo - ethyl nitrate to an a -nitrophenyl-b -haloethanol by treating with aqueous hydrohalic acid at a temperature above 30 DEG  C., separating the organic portion of the reaction mixture, dissolving it in concentrated sulphuric or acetic acid and oxidizing to the corresponding nitroacetophenone by treating with chromic acid in the presence of sulphuric acid.  The starting materials and products may be further substituted on the phenyl nucleus by an alkyl group of 1-4 carbon atoms.  The hydrolysis of the a -nitrophenyl-b -halo-ethyl nitrate is suitably carried out using more than one molecular proportion of hydrobromic or hydrochloric acid.  Hydrohalic acid lost by oxidation by the nitric acid formed during the hydrolysis may be replaced by the addition of gaseous hydrohalic acid or the concentration of hydrogen halide may be maintained by passing a reducing agent such as sulphur dioxide into the reaction mixture.  The a  - nitrophenyl - b  - haloethanol obtained in the first stage of the above process may be isolated as an intermediate product before being converted to the nitroacetophenone.  In examples: (1) a solution of a -p-nitrophenyl-b -bromoethyl nitrate in trichloroethane, obtained by nitration of a -phenyl-b -bromoethanol, is heated with p  hydrobromic acid and sulphuric acid in the presence of sulphur dioxide to give a -p-nitrophenyl-b -bromoethanol which is oxidized with chromic acid in the presence of glacial acetic and sulphuric acids to give a -bromo-p-nitroacetophenone; (2) a -p-nitrophenyl-b -bromoethyl nitrate is hydrolysed as in (1) to a -p-nitrophenyl-b -bromoethanol, hydrolysis being effected by continuous addition of hydrobromic acid in the absence of sulphur dioxide; (3) and (4) a -p-nitrophenyl-b -bromoethanol is oxidized as in (1) to a -bromo-p-nitroacetophenone; (5) a -(3-methyl-4-nitrophenyl)-b -bromoethyl nitrate is hydrolysed to a -(3-methyl - 4 - nitrophenyl) - b  - bromoethanol by heating with hydrobromic acid; and (6) a -p-nitrophenyl-b -chloroethyl nitrate is hydrolysed to a  - p - nitrophenyl - b  - chloroethanol which is oxidized to a -chloro-p-nitroacetophenone.  Specification 735,545 is referred to.
Patent GB-859713-A (GB)
Title: Improvements in or relating to combustion systems for gas turbine engines
Inventor: LAND MARTIN
IPC: F23R3/00
Filed: 1958-05-03
Abstract: 859,713. Vapour burners. ROLLS-ROYCE Ltd. Feb. 27,1959 [May 3, 1958], No. 14179/58. Class 75(1). A combustion system for a gas turbine engine comprises a fuel injection nozzle and fuel conduit means for supplying the fuel injection nozzle with fuel, the fuel conduit means, incorporating a bleed valve which is open when fuel vapour is passing through the bleed valve so as to permit the escape of fuel vapour from the system and valve closure means which, when the fuel in its liquid state flows through the bleed valve, effects delayed closure thereof. A reheat system has a fuel tank 17, a pump 18, an adjustable valve 19 and manifold switch supplies fuel to three concentric pipes 25 to 27 each of which is connected to the casing 32 of the bleed valve supported'by a bracket 16 within a jet pipe 13. Any fuel which vaporizes in the pipes flows into the valve casing through an aperture 34 at one end of a sleeve 33 therein and out through the other end of the valve, the mushroom valve 35 being unseated from its seating 38 at all temperatures of fuel at and above vaporization temperature. When the valve closes the fuel discharges manually from the aperture in the concentric pipes. The valve stem 36 has a greater coefficient of expansion than that of the valve casing and sleeve. A small.bleed hole 39 is provided in the valve which remain open when the mushroom valve closes. The engine comprises combustion chambers 10, low and high pressure turbines 11, 12, a jet cone 14 and a jet pipe 13 with a nozzle 15. The bracket 16 supports three girders 25a to 27a.
Patent GB-539916-A (GB)
Title: Improvements relating to bases for electric lamps and similar devices
IPC: H01K1/46
Filed: 1940-09-16
Abstract: 539,916. Lamp-caps. BRITISH THOMSONHOUSTON CO., Ltd. Sept. 16, 1940, No. 14227. Convention date, Sept. 16, 1939. [Class 38 (i)] A resilient centre contact for a screw-cap lamp or similar device comprises a flat disc 21 supported on a helical spring 22. The disc and spring are stamped from a sheet metal blank the spring consisting of the annular section surrounding the disc 21 and left attached thereto by a narrow neck 23. The free end of the spring is soldered or riveted to the base evelet 18. In a modification the eyelet may be made in one with the contact being formed as a disc 26, Fig. 4, attached by a neck 28 to the contact disc 30 and spring 31. The neck 28 is bent double to bring the disc 30 centrally over the eyelet 26.
Patent GB-732432-A (GB)
Title: Improvements in, or relating to, thermostatically controlled valves
Inventor: SMITH HERBERT ALWYN
IPC: G05D23/13
Filed: 1950-06-08
Abstract: 732,432. Thermally - actuated valves. SPIRAX-SARCO, Ltd. Sept. 10, 1951 [June 8, 1950], No. 14257/50. Class 135. A thermostatic valve for blending two different temperature fluid streams to provide a mixture at 10 for feeding a heat exchanger in an enclosed space to maintain the space temperature at a constant selected temperature, has oscillatory carriage 28 carrying valves 21, 22 at its ends and intermediate ports 19, 20, the carriage being displaceable by a thermal element 26 influenced by the ambient temperature and comprising a drive transmitting member 25 moved linearly with temperature variations and actuating the carriage through intervening mechanism which converts the linear motion into carriage movements whereby the proportion of one fluid stream to the mixture is varied according to an exponential law. This law is y = a function of tn, where y is the heat loss from the heat exchanger or from the enclosed space, t is the difference between the space and external temperatures, and n is a constant exponent power determined by the needs of a particular enclosed space. The intervening mechanism comprises a selectable cam 60 on which run rollers 70 carried by bridges 71 pivoted at 74 and spring loaded towards the cam, the bridge 71 being connected to a carriage arm 75 through a pin 77 and lever 16 also pivoted at 74. The other lever 17 is loose relative to the other bridge. In a modification the intervening mechanism comprises links, levers and cam in which a link and the cam are each adjustable over a scale for selecting the constant n.
Patent GB-546901-A (GB)
Title: Method of producing rosin size emulsions
IPC: C11D15/00
Filed: 1940-09-17
Abstract: 546,901. Rosin sizes; making emulsions. JACKSON, L. MELLERSH-. (Hercules Powder Co.). Sept. 17, 1940, No. 14266. [Classes 1 (i) and 91] In the production of a stable rosin size emulsion prior to its use in a sizing bath for paper, textiles &c. from an aqueous emulsion or dispersion of ammonium resinate, the emulsion is heated to drive off predetermined quantities of the ammonia so as to adjust the free rosin content of the emulsion and preferably to free 30 to 97 per cent. of the rosin. To prepare the starting emulsion liquid rosin is saponified by the addition of water and ammonium hydroxide to form a paste, which is liquid at about 70‹C., and the liquid paste is emulsified with sufficient water to provide a mixture containing 1 to 60 per cent. and preferably 5 to 15 per cent. of solids. Colloidal stabilizer in the 'amount of 1 to 25 per cent. of the solids content in the emulsion may be added such as 4 to 8 per cent. of casein. Other stabilizing agents specified comprise soya bean protein, and animal glue; the stabilizer may be added during the saponification or mixed with the paste emulsion either before or after heating. Illustrative examples are given.
Patent GB-301363-A (GB)
Title: Improvements in, and relating to, machines for filling bottles and other vessels
IPC: B67C3/20
Filed: 1927-05-27
Abstract: 301,363. Nielsen, H. V. May 27, 1927. Moving-chamber apparatus.-In a machine for filling bottles or other receptacles q with liquids or powders from a tank a having vent pipes d<1> extending through the tank, auxiliary vent passages f are provided in the bottom of the tank and in the valve plate g. The tank is supported by a frame b and discharges the liquid into measuring chambers k in a member j, which is adapted to slide between a ported plate b<1>, forming the bottom of the tank, and a ported plate n discharging through nozzles p. The member j is moved by a handle x, and in one position liquid flows into the measuring chambers through ports d, air escaping through the pipes d<1>. In the other position of the member the measuring chambers discharge through the nozzles p. The plate n is pressed upwards by springs w resting on a plate t which is carried by brackets r hung by bolts s from the bottom of the tank. The bottles q are carried by a. platform 22, the spindle 21 of which is mounted in a sleeve 18 and can be rotated by rack and pinion mechanism 25 operated by links from a lever 30. The platform is raised to engage the bottles with the nozzles by means of a lever 16, 20 operated by links from the lever x. Alternatively the ports in the plates b<1>, n may be so arranged that half the chambers k are filling while the others are discharging, the bottles being carried by two stationary spring platforms corresponding to the two sets of measuring chambers. The nozzles have conical ends 6 which serve to centre the bottles. The liquid is discharged on to the sides of the bottles by ports 8, air escaping by ports 7. In a modification the tank 40, Fig. 3, revolves and carries a number of measuring vessels 48 which oscillate on fixed axles 49 between fixed valve plates 43, 60, the parts being held in contact by a spring 64. The chamber 48 is oscillated by contact of lugs 58, 59 with fixed stops 65. Liquid is admitted to the chamber 48 by ports 44, 52, air escaping by the port 53 and pipe 46 and by passages 67. The chamber discharges by a port 56 to the nozzle 61. The chamber may be divided into two compartments adapted to fill and discharge alternately. In this case the chambers may have straight through ports, as shown, or ports opening to the valve plate on one side of the dividing partition may open into the measuring chamber on the other side of the partition. The measuring chambers may be of different capacities and may discharge to a common outlet by means of suitable passages in the lower valve plate. In a modification the measuring chambers are oscillated by projections engaging cam tracks. In a further modification, the measuring chambers 100, Fig. 12, are arranged horizontally between curved seatings 103 in the tank 101 and curved valve-plates 102.
Patent GB-1519233-A (GB)
Title: Cable tie
IPC: B65D63/10
Filed: 1977-02-08
Abstract: 1519233 Band clamp BOWTHORPE-HELLERMANN Ltd 8 Feb 1977 [8 April 1976] 14428/76 Heading E2B  A band clamp comprises a flexible strap 12 bearing serrations 13 and an integral head containing toothed pawl 28. In the rest position the crests of the teeth 34a, b, c of the pawl lie in a common plane perpendicular to that of strap 12, whereas surface 40 of passage 22 diverges from this common plane so that tooth 34c nearest the pawl lies nearest the surface 40. Projection 28a may be provided to limit the rotation of the pawl.
Patent GB-406633-A (GB)
Title: Improvements in hard alloys
IPC: C22C29/10
Filed: 1932-05-21
Abstract: A sintered hard alloy for making tools contains titanium carbide as the principal constituent and 1-30 per cent of a metal or metals of lower melting point than titanium, such as iron, nickel, or cobalt, with or without one or more hard nitrides, borides, silicides, or hard carbides other than titanium carbide.
Patent GB-600713-A (GB)
Title: Improvements in or relating to thread winding machines
IPC: B65H59/38
Filed: 1944-07-29
Abstract: 600,713. Winding thread. SCHARER, K. J. (trading as MASCHINENFABRIK SCHARER)..July 29, 1944. No. 14532. Convention date, Sept. 9, 1943. [Class 120(ii)] In a yarn-winding machine a speed control device is provided in the gear box for driving the winding spindle and automatically regulating the thread feeding movement as the package increases in diameter. As shown, the inclined winding spindle 1 is driven from a co-axial spindle 31 through the discs 34, 35 each having a groove 36 of arcuate cross-section and coupled by a disc 37 mounted in a stirrup 39 so that its centre coincides with the centre of the arcuate portions of the discs 34, 35. The spindle 1 is mounted in bearings in a gear box 2 and drives the shaft 14 of the drum 18 through bevel wheels 6', 7 a fluted shaft 8 and bevel wheels 11, 13. The outer bearing 16 for the shaft 14 is mounted in a bracket 17 connected to the casing 10 which is counterweighted at 20 and is guided by rollers 25, 26 engaging the rods 21, 22. The thread guide 30 is actuated by gearing 27, 29 driven from the bevel gear 13. As winding proceeds the casing 10 carrying the drum 18 is forced downwardly by the growing package- A, the rack rail 46 or the casing 10 rotating the slotted arm 44 and thence the gears 42, 41 the latter of which is mounted on the stirrup 39. The disc 37 is thereby rocked to reduce the speed of rotation of the winding spindle 1 so as to maintain constant the velocity of winding of the thread on to the package. Specification 598,951 is referred to.
Patent GB-702879-A (GB)
Title: Improvements in reinforcing synthetic rubber
IPC: C08L21/00
Filed: 1952-06-10
Abstract: A synthetic rubber latex is mixed with an aqueous dispersion of hydrated silica containing a polyethylene polyamine, coagulated p and the coagulum separated.  Specified latices are those derived from butadiene 1 : 3, methyl-2-butadiene-1:3, chloro-2-butadiene 1:3, piperylene, and 2 3-dimethylbutadiene 1:3 or a mixture with styrene, vinyl naphthalene, alpha methyl styrene, parachlorostyrene, dichlorostyrene, acrylic acid, methyl acrylate, methyl methacrylate, acrylonitrile, methacrylonitrile, methacrylamide, methyl vinyl ether, methyl vinyl ketone or vinylidene chloride.  Specified polyamines are diethylene triamine, triethylene tetramine, tetraethylene pentamine, heptaethylene nonamine and nonaethylene decamine.  Specified coagulants are formic, acetic and propionic acids, which may contain glue.  In an example, a mixture of butadiene and styrene is polymerized at 41 DEG  F. in an aqueous emulsion containing the sodium soap of a mixture of oleic, stearic and palmitic acids as emulsifiers, the sodium salt of condensed alkaryl naphthalene sulphonic acid as stabilizer, cumene hydroperoxide as catalyst, diethylene triamine as activator tert-dodecyl mercaptan as modifier and potassium chloride as viscosity reducer, to 60 per cent. conversion.
Patent GB-1176315-A (GB)
Title: Novel Ruminant Feed Supplement
Inventor: GILBERT RICHARD LAPHAM JR
IPC: A23K50/15
Filed: 1968-03-26
Abstract: 1,176,315. Ruminant feed supplement. AMERICAN CYANAMID CO. 26 March, 1968 [4 April, 1967], No. 14559/68. Heading A2B. An urea-ammonium phosphate feed supplement is characterised by having an ammonia to phosphoric acid mole ratio of 1:1 - 1.4:1, an ammonia nitrogen to urea nitrogen ratio of not more than 2:8.75, and a ratio of total nitrogen to phosphorus of 3:1-10:1. The supplement may be prepared by reacting defluorinated wet-process phosphoric acid with ammonia or diammonium phosphate, drying the product, and mixing with urea. The supplement may be mixed with ruminant feeds containing carbohydrates and proteins.
Patent GB-830651-A (GB)
Title: Improvements relating to electric cables
Inventor: HARGREAVES FRANCIS GEORGE
IPC: H01B7/36
Filed: 1956-05-10
Abstract: 830,651. Cables. SHARDLOW ELECTRIC WIRES Ltd. Oct. 5,1956 [May 10, 1956], No. 14606/56. Class 36. A conductor is covered with insulating braiding and then with a transparent or translucent plastic material. In a multi-core cable each conductor may have a braided covering of a different colour, or containing threads of different colours, and the cores may be individually or collectively enclosed in the plastic covering.