baber/WOPTO huggingface dataset:
Patent GB-609132-A (GB)
Title: Improvements in or relating to electric motor control systems
IPC: H02M7/00
Filed: 1946-03-06
Abstract: 609,132. Control of D.C. motors. GENERAL ELECTRIC CO:, Ltd., and DUNHAM, C. R. March 6, 1946, No. 6989. [Class 38 (iii)] Regenerative braking.-A motor control system comprises a D.C. motor arranged to receive power from, or supply regenerated power to, an A.C. circuit which is associated with a constant voltage to constant current transforming circuit and a converter through which the flow of current may be controlled, the converter being arranged to receive power from the A.C. circuit through the transforming circuit, rectify it and supply the D.C. circuit or, alternatively, on receiving regenerated power from the D.C. circuit, invert it and supply A.C. through the transforming circuit to the A.C. system. As shown, the constant voltage A.C. supply 6 is connected across a series resonant circuit comprising an inductance 9 and condenser 10, and across the condenser is connected the primary winding 11 of a transformer 12, in series with an inductance 13 for power factor improvement. The anodes 15 of a bi-phase rectifier are respectively connected to the ends of the secondary winding 14, which has a centre tapping 16 connected to one terminal 17 of the armature of a D.C. motor, the other terminal 19 being connected to a strap connection between the cathodes 18 of the rectifiers. The motor field 3 is separately excited and has a regulator 5, and the armature is connected to drive a load 4 which has an inertia such that regeneration is effected under certain conditions. The rectifiers are grid controlled to ensure alternate operation of the anodes and prevent shortcircuiting of the motor armature. The means 5 controlling the excitation of the motor field 3 may be controlled by a signal dependent on the actual performance of the motor and/or a signal dependent on the desired performance.
Patent GB-621209-A (GB)
Title: Process for the production of esters of mono-methylene-ethers of 2 keto-l-gulonic acid
IPC: C07H7/02
Filed: 1946-03-06
Abstract: Esters of monomethylene ethers of 2-keto-l-gulonic acid are made by heating a bismethylene ether of 2-keto-l-gulonic acid or a salt thereof with an alcohol in the presence of an esterifying catalyst in a quantity less than 1 per cent of the alcohol, excluding any required for neutralization, when a salt is employed as starting material, and simultaneously removing the moisture present, the hydration water, and the carbonyl compound liberated by azeotropic distillation.  An auxiliary liquid such as hexane, benzene, toluene, cyclohexane, carbon tetrachloride, trichlorethylene, and dichlorethane may be employed.  Alcohols specified are ethanol, glycol, propanols, allyl alcohol, butanols, and esterifying catalysts specified are hydrochloric, sulphuric and phosphoric acids, benzene and naphthalene sulphonic acids, and pyridine.  When salts of bismethylene ethers of 2-keto-l-gulonic acid are employed, enough acid is present to neutralize the base liberated, and as bis-methylene ethers the compounds of 2-keto-l-gulonic acid with acetone, methylethylketone, cyclohexanone, or benzaldehyde are specified.  Reduced or atmospheric pressure may be employed, and the process may be carried out continuously.  The products may be converted to ascorbic acid by heating in an acid medium.  Examples describe the reaction of diacetoneketogulonic acid with (1) ethanol, and (2) butanol, in presence of benzene and sulphuric acid, and also (3) the reaction of diacetoneketogulonic acid sodium salt with ethanol in presence of hydrochloric acid and benzene.
Patent GB-194141-A (GB)
Title: Improvements in hydraulic pressure-relief devices for presses
IPC: B30B15/28
Filed: 1922-03-10
Abstract: 194,141. Fawcett, Ltd., T. C., Fawcett, D. L., and Bottomley, A. E. March 10, 1922. Strain, preventing; pressing plungers and dies. - An hydraulic pressure-relief device for brick and other presses comprises rams b, e, Fig. 1, so arranged that downward movement of the lower plunger of the press is first resisted by the ram e, and then by both rams. In a modification, the plunger g comprises outer and inner parts g<1>, g<2>; Fig. 2, supported by the rams, both of which yield together under normal pressure ; excess pressure is taken up by the ram e, the plunger part g<2> provided with a panel or recess forming member g<3> continuing its motion.
Patent GB-1079534-A (GB)
Title: Process of manufacture of propanolamine derivatives
IPC: B26F1/00
Filed: 1965-02-19
Abstract: Compounds of the general formula R2O.CH2.CHOH.CH2.NHR1 (wherein R1 stands for an alkyl radical of not more than ten carbon atoms and R2 stands for a naphthyl or tolyl radical) and their acid addition salts are prepared by reacting R2OH or an alkali metal derivative thereof with an epihalohydrin and R1NH2, optionally followed by salt formation.
Patent GB-1060436-A (GB)
Title: Improvements relating to zeolites
IPC: B01J20/18
Filed: 1964-02-20
Abstract: A zeolite, designated Z-14 US, of formula 0-1 M2/nO.Al2O3.3.5-7 SiO2.0-9 H2 where M is H+ or any cation other than alkali metal having a valency (n) of not more than 4, has an alkali metal content calculated as oxide of less than 1% and a unit cell size of 24.2-24.45 <\>rA.  The H form is prepared by base exchange of a crystalline faujasite with a salt of a nitrogen base until the Na2O content is less than 5%, washing, calcining or steaming at 150-820 DEG  C. for 0.1-12 hrs., cooling, base exchanging as before to less than 1% Na2O, washing, calcining at 540-820 DEG  C., and cooling. The exchanges may be carried out at 25-150 DEG  C. for 0.1-24 hrs. using 5-600% excess of an ammonium chloride, sulphate, or nitrate, or tetraethyl ammonium chloride or sulphate solution, and may be repeated at least once. During or after final exchange, the slurry may be aged in the solution or in water at 25-150 DEG  C. for 1-3 hrs.  The product contains 67-80% SiO2 and 20-33% Al2O3, has a water adsorption at 25 DEG  C. and 10% RH of 6-12 gms. H2O per 100 gms. zeolite, and a surface area greater than 150 m.2/gm. (e.g. up to 708 m.2/gm.) after calcining at up to 1040 DEG  C. or treating with 25% steam at 830 DEG  C.  Other cations, e.g. Y, rare earths (La to Lu), Al, Pt, and other metals of groups 1B, 2, 3, 4B, 5B, 6B, 7B, or 8 may be introduced.  The initial faujasite may be natural or synthetic, e.g. zeolite Z-14 HS, prepared by forming a mixture of composition .Na2O/SiO2... .. ...0.2-0.8 .SiO2/Al2O3... .. ...10-30 .H2O/Na2O... .. ...20-60 digesting for at least 3 hrs., and heating to crystallize, as described in Specification 986,864.
Patent GB-233102-A (GB)
Title: Improvements in and relating to grinding apparatus for trueing and surfacing railway and tramway rails in situ
IPC: E01B31/17
Filed: 1924-03-22
Abstract: 233,102. Chamberlain, W. A., and Clark, W. W. March 22, 1924. Railway and tramway rails, trueing and surfacing in situ.- A machine for grinding railway and tramway rails comprises a frame 2 supported on two pairs of adjustable legs 4, 5, the legs 5 fitting the rail and serving for adjustment of the grinding-wheel 8, and the legs 4 serving to adjust the level of the machine. On the frame is a saddle 3, moved along the frame by a handoperated screw 6, and on the saddle is pivotally mounted, by means of a screwed shaft 14, a frame comprising two levers 7 carrying at one end the grinding-wheel, and carrying at the other end a nut L2 engaging a hand operated screw 11, whereby the levers are rocked to adjust the grinding-wheel. The wheel may be adjusted axially by rotation of the shaft 14, which is mounted in the saddle 3 to rotate but not to move axially, and screws in the frame. The sbaft is operated, through gearing 16, 17, by a handle 18. To enable the machine to be placed in, and removed from operative position, two wheels 19 are mounted on axles 20 carried bv levers 22 pivoted on the frame 2, and movable by a bar 23.
Patent GB-573962-A (GB)
Title: Mechanical loader for loading machine cut coal on to a conveyor
IPC: E21F13/06
Filed: 1943-05-11
Abstract: 573,962. Conveyers. HUDSON, W., and MAGEE, C. S. May 11, 1943, No. 7426. [Class 78 (i)] To load machine-cut coal on to a conveyer a flight of picks 12 is employed attached to a link 10 connecting a pair of crank pins on a pair of parallel shafts, other pins at right-angled position being connected by a similar link. The shafts are vertical and the throw of the upper cranks is advantageously somewhat less than that of the bottom cranks. The coal is delivered by way of a shoot 8 on to the face conveyer and the machine is pulled into the coal along the face by ropes. The flight of picks and their shafts and co-operating link are mounted in a jib structure adapted for attachment in place of the usual coal cutting jib to a coal-cutting machine 2 for operation thereby.
Patent GB-951544-A (GB)
Title: The manufacture of cellulosic textile materials
IPC: G06M1/22
Filed: 1961-03-01
Abstract: Crease resistant and otherwise improved textile structural elements formed by intertwining or otherwise binding together two or more filaments, e.g. woven, knitted and non-woven fabrics, yarns, threads, ropes and cables, are made by impregnating cellulosic fibres with a cross-linking agent for the cellulose which will not react with itself upon storage or the application of a temperature of below 100 DEG C., converting them into textile structural elements and curing the textile structural elements while they carry unreacted cross-linking agent sufficient to improve their properties, e.g. while not less than 30% of the cross-linking agent remains unreacted. The cross-linking agent which maybe a "reactant-type" resin, e.g. methylated methylol urea, N-substituted methylol triazanes, methylol-N-substituted triazines and methylated and unmethylated methylol ethylene ureas or 1,2-propylene ureas, maybe applied to the cellulosic fibres in the form of staple fibre or continuous filments or tans or regenerated cellulose fibres in the gel state after spinning, as an aqueous solution containing 4-25% by weight of the cross-linking agent and 10-50% by weight based on the cross-linking agent of a latent catalyst, e.g. magnesium chloride, zinc fluoroborate and magnesium perchlorate.  The aqueous solution may also contain hand builders, lubricants and water repellants, e.g. polyethylene glycolstearate, silicones, polyvinyl alcohol and acrylic polymers.  The treated fibres may then be dried and stored at a temperature below 100 DEG C.  The textile structural elements may be moistened with water by spraying or steaming until their moisture content is raised to 20-100% based on the dry weight of the fibres and then cured by heating to 130 DEG -170 DEG C. for 3-20 minutes. Textile materials comprising cotton, linen, regenerated cellulose, cellulose acetate, propiarate or butyrate or carboxy methyl or carboxyethyl cellulose fibres alone or in admixture with up to 50% by weight of nylon, polyester or acrylic fibres may be treated.  The treated fibres may be blended with wool and made into pile carpets prior to curing.  Specifications 788,945 and 878,655 are referred to.
Patent GB-309699-A (GB)
Title: Improvements in or relating to electromagnetic switches
IPC: H01H71/24
Filed: 1928-03-10
Abstract: 309,699. Curtis Automobite Co., Ltd., and Oglethorpe, E. L. March 6, 1928. Animal - carrying vehicles. - In hinged ramps for vehicles of the kind described in Specification 269,752 means are provided for controlling the hinged end of the ramp and for utilizing the weight of the ramp for controlling the lowering. As shown a cord &c. 8 is connected at about the middle point 9 of the ramp 3 passes over a pulley 10 and is connected at its other end to a barrel 12 which is surrounded by a spring 13 within a tube 11. The spring bears at its upper end' against an abutment 14 in the tube 11 and at its lower end against an abutment on the barrel 12. In lowering the ramp 9 is counterbalanced by the compression of the spring which compression also raises the hinged end of the ramp from the position 5 in the bracket 6 to the position 7 where it may be secured by a fastening 15. Weights or other equivalent means may be substituted for the spring. The cords 8 are preferably duplicated at either side of the ramp.
Patent GB-925263-A (GB)
Title: Tape recording playback apparatus
Inventor: FLETCHER HOWARD LYNTON
Filed: 1961-03-01
Abstract: 925,263. Magnetic tape apparatus; track selection. RECORDED SOUND Ltd. Feb. 28, 1962 [March 1, 1961], No. 7538/61. Class 40 (2). A carriage 16, carrying a head 15 for transverse movement across a wide, multi-track magnetic endless tape bearing a plurality of announcement recordings is provided with a rack 17 engageable by a motorized pinion 18 actuated by external selector means to traverse the head to the approximate position of a selected track and by a rack-form member 25 which engages the rack 17 to zero and lock the - head in exact register. A clear patch on the tape and associated photo-electric circuit means (Fig. 5, not shown) halts the tape after each announcement. An arrangement, not detailed, is envisaged wherein a plurality of selectivelyswitched heads are traversed simultaneously over corresponding bands of tracks on the tape to give equivalent announcements in a plurality of languages.
Patent GB-613060-A (GB)
Title: Improvements in or relating to an alloy steel
IPC: C22C38/16
Filed: 1946-03-12
Abstract: An alloy steel, having a high impact resistance for low temperatures in the "as rolled" condition as well as after a stress relieving heat treatment, said alloy steel having the following composition:-C 0.01-0.15 per cent, Mn 0.40-1.00 per cent, P 0.05-0.13 per cent, Si 0.02-0.20 per cent, Cu 0.80-1.30 per cent, Ni 0.40-1.00 per cent, Al 0.10-0.40 per cent, Mo 0.08-0.35 per cent, Fe and the normal impurities forming the balance.  The sum of the Al and Mo contents must be at least 0.28 per cent.  The alloy steel may be heated at 482 DEG -620 DEG C. for from 1-36 hours to increase the yield point and tensile strength without any substantial loss of impact properties at temperatures substantially below 20 DEG C.
Patent GB-356691-A (GB)
Title: Improvements in and relating to the blades of fans or ventilators
IPC: F04D29/32
Filed: 1930-03-08
Abstract: 356,691. Casting. ADAMCIKAS, M. and MASSERA, G., Astor House, Aldwych, London. March 8, 1930, No. 7663. Addition to 312,748, [Class 110 (i), Centrifugal and screw fans &c.]. [Class 83 (i).] Moulds; patterns.-Fans of the type described in the parent Specification, having overlapping blades which increase in width and geometric pitch towards the hub, are made by casting ; four or more moulds divided into sections at right-angles to the rotor axis are used. When four moulds a .. d are used, as shown in Fig. 2, the pattern f is split into two parts by a division at right-angles to the axis, and portions g, h of the blades form part of the divided pattern. Portions of the blades overlap and the sand in each mould is indicated by the letters a<1> .. d<1>. When six or eight moulds are used the pattern is divided into three or four parts.
Patent GB-235955-A (GB)
Title: Improvements in or relating to grinding, milling and pulverizing apparatus
IPC: B02C13/31
Filed: 1924-03-26
Abstract: 235,955. Mayhew, M. J., and Ramsay, R. K. March 26, 1924. Impact pulverizers.-In a grinding, milling, or pulverizing machine in which the material is shattered by means of hammers or maces pivoted to a rotary shaft, the material undergoes a progressive pulverizing action in a single chamber. a portion of the chamber for the preliminary or initial stage of the pulverizing having an imperforate wall, excepting for a feed-opening, thereby preventing the egress of any sparks which may fly off the mateirial, and a portion for the final pulverizing having a perforated wall or screen through which the pulverized material is drawn by means of a fan communicating therewith by means of an air duct. As shown, Figs. 1 and 2, the hammers 6 are carried by an horizontal shaft 1 within a cylindrical casing forming a. single chamber, the curved wall of which is perforated as to one half 9 and imperforate as to the other half 10, excepting for the feedopening 11 at the lower end of the shoot or hopper 12. The upper half of the screen-like portion 9 is enclosed by a semi-cylindrical cover 13. The pulverized material escapes through the wall 9 into an air duct 16 which is fitted with a perforated plate 17 or sheet of wire gauze and communicates with a centrifugal &c. fan on the shaft 1. The hammer links or bars 6 are carried separated by distance-pieces 3 on the shaft 1, and the terminal pieces or mace heads 7 may have a limited movement on their attachment pins 8. The wall 10 may be formed with a boxlike recess 18, provided or not with a flap 19, to receive any heavy foreign bodies present in the material.
Patent GB-1423551-A (GB)
Title: Frame members and a frame assembled from such members
IPC: E06B3/263
Filed: 1973-02-16
Abstract: 1423551 Insulated frames ANCIEN ETABS ED GEISLER-LIGNIAN SA 16 Feb 1973 [16 Feb 1972] 7741/73 Heading E1J Two elongate, metal frame components 4, 14 are interconnected in side-by-side relationship and also thermally and/or acoustically insulated from each other by the interposition of a resilient member 28 which frictionally engages the two components 4, 14, each component having at least two pairs, e.g. 8, 9, 10, 11 of oppositely inclined surfaces and one component 14 being channel sectioned with the inner surfaces 22, 24 of the channels' limbs being outwardly divergent.
Patent GB-986608-A (GB)
Title: Liquid fuel-burning heater
IPC: F23D11/04
Filed: 1964-02-25
Abstract: 986,608. Liquid fuel burners. E. S. DOWNS. Feb. 25, 1964 [Oct. 31, 19631, No. 7746/64. Heading F4T. A liquid fuel burner comprises a spinner 40 for throwing the fuel outwardly on to an annular wall 37 made of superimposed filaments of metal, such as stainless steel, bonded together to form a felt. The wall is absorbent and porous and is made by welding or fusing together metal filaments by heating without destroying the structure of the filaments. The wall is disposed inside a tubular combustion chamber 23 having openings 36 supplying primary air to the outer surface of the wall. The combustion chamber is disposed inside a tubular casing which also contains an electric motor driving the spinner 40 and a fan supplying primary and secondary air. The spinner may be constructed as disclosed in Specification 948,867.
Patent GB-496791-A (GB)
Title: Self-closing valve for fire extinguishing apparatus
IPC: A62C13/00
Filed: 1938-03-12
Abstract: 496,791. Lift valves; preventing leakage. CONCORDIA ELEKTRIZITATS AKT.-GES. March 12, 1938, No. 7776. Convention date, May 7, 1937. [Class 135] A self-closing valve for fire-extinguishing apparatus is guided in a lead bushing b agains one end of which it is forced when closed by the pressure within the apparatus and when open is sealed by a collar f pressing against the other end of the bush. The valve is opened by depressing a button e either by hand or through a lever.
Patent GB-808372-A (GB)
Title: Slide rule or similar educational appliance
IPC: G06G1/04
Filed: 1955-03-17
Abstract: 808,372. Educational appliances. MARSAN, C. March 17, 1955, No. 7807/55. Class 146(2) [Also in Group XIX] A linear or circular disc slide rule Figs. 1, 5, 8 has a slot 4 in the lower member 1 enabling the operator to grip the upper member 2 between thumb and fingers to facilitate adjustment thereof. A lug 5, one or more holes 6 for the insertion of the operator's finger, or an embossed, sticky or other frictional surface 7 may also be provided on the upper member 1 to facilitate movement thereof. The cursor, Fig. 8, may comprise a rubber band 13 passing through a central opening and knotted at 14. A form scaled for showing the multiplication tables comprises on the lower member 1, Fig. 5, an inner scale A of multiplier digits 1, 2...9, which are brought into view singly at a triangular notch B in the upper member (disc) 2. The nine products of the multiplier selected are then shown by an outer scale S on the lower member 1 through windows W in the upper member 2 against the corresponding multiplicand digits M on the upper member. The windowed periphery of the upper member may be omitted, Fig. 6 (not shown) so that the entire products scale is revealed. Further indicia 12 may be provided at the corners of the lower member, Fig. 5, to indicate the range of values in the associated quadrant of the products scale, and the top right hand corner of the lower member may be cut away, at 11 to facilitate orientation thereof.
Patent GB-739480-A (GB)
Title: Improvements in and relating to the production of prestressed concrete
IPC: E04C5/12
Filed: 1954-03-18
Abstract: 739,480. Reinforced concrete. LEE, D. H. March 18, 1954, No. 7877/54. Class 20 (4). In a pre-stressed concrete member having high-tensile steel reinforcement bars with riblike projections for increasing the bond, the ends of the bars are encircled by annular reinforcement means embedded in the concrete, to resist the forces in the concrete tending to burst the same. The rib-like projections may be of any desired arrangement, and the annular reinforcement may be a wire helix or a number of spaced wire rings. In the post-tensioning method shown in Fig. 4, one end 3 of the reinforcement bar 2 is embedded in the concrete 1, the remainder of the bar being surrounded by a sleeve 4 which is sealed at 5 to the bar, to prevent the entry of water or concrete, and is provided with grout feed and air escape passages 6, 8. The reinforcements 9 are positioned in the mould either by wire clips on the reinforcement 2, or by being suspended from a rod carried by the mould walls. When the concrete has set, the reinforcement is tensioned by a jack 13 and held in tension by a temporary anchor 14. Grout is then supplied to the sleeve 4 by the passages 6, 8 and, if desired, through the end 18 of the sleeve by the use of suitable apertured masks 19. The end anchorage may be increased, Fig. 6, by applying a collar 20 to the bar, e.g. by pressing on the collar whilst hot. In this case, the sleeve 4 is splayed to accommodate the collar and the grout in which it is finally embedded. Alternatively, as in Fig. 7, the collar may comprise two wedge pieces 22 of cast iron formed to fit over the rib-like projections on the reinforcement, and kept together by a collar 23 which is driven tighter on to the wedge pieces 22 by the tension in the reinforcement. In Fig. 8, the bar 2 is gripped by wedge-pieces 25 in a chuck 26 which is screwed internally at 32 to receive a complementary screw on the jack by which the tension is applied. The tension is held by a sleeve 30 which is screwed down on to the end face of the concrete 1. The chuck 26 may have an externally-screwed part of reduced diameter, instead of the internal thread 32, to connect with the jack, and the sleeve 30 may be merely a screwed ring which bears upon a plain sleeve or U-shaped spacer which bears against the concrete. In Fig. 9, the bar 2 extends diametrically through a hole 35 in a block 33 having transverse bars 38 to which a jack stirrup can be connected. Segment-shaped members 36, with serrated chords 37 are inserted in the hole 35 to grip the bar. The tension is held by bolts 41 screwed into a U-shaped member 40 which bears on the concrete. When the invention is used for pre-tensioning, the same technique is used except that the sleeve 4 is absent and the moulds are made strong enough to withstand the stress of tensioning. The invention may be applied to " long line " production, i.e. the arrangement of moulds in a line with common reinforcements running through them.