baber/WOPTO huggingface dataset:
Patent GB-679247-A (GB)
Title: Improvements in a device for uncoupling a shaft
IPC: G05G15/00
Filed: 1951-03-02
Abstract: 679,247. Operating clutches. NEDSCHROEF OCTROOI MAATSCHAPPIJ N.V. March 2, 1951 [March 16, 1950], No. 5156/51. Class 80 (ii). The axially-slidable clutch key 5 of a power press is normally held engaged by a spring 6 and is disengaged when the chamfered end 6 of one arm 12. of a lever engages an inclined part 17 of the key, the other arm 10 of the lever carrying a roller 13 urged by a spring 11 against cam 14 on the driven shaft 1 such that normally the lever 10, 12 oscillates idly in a radial plane. When, however, the supply of material to the press is stopped or reduced, a member 19 is projected into the path of the arm 12 so as to prevent its outward movement, whereupon the key 5 is disengaged. The member 16,.slidable in a guide 18, is moved by the arm 20 of a spindle 21. A brake band 24 has one end 29 connected to the arm 10 and the other end connected to one arm 28 of a lever the other arm 26 of which carries a roller co-operating with a cam projection 25, the arrangement being such that, as the clutch disengages, the shaft 1 is braked by a pull on both ends of the band 24, the shaft being positively stopped by an abutment 22 on the arm 12.
Patent GB-1028162-A (GB)
Title: Hydrate forming saline water conversion process
IPC: C02F1/26
Filed: 1963-02-08
Abstract: Saline waters are contacted with gases to form solid hydrates and the separated hydrate is washed with a saline wash water, which may be feed water, to remove occluded concentrated saline water before break down of the hydrate for the recovery of purified water.  The hydrate crystals may be given further washing treatments with saline water-immiscible liquids.
Patent GB-416925-A (GB)
Title: Improved thermostatic temperature controlling means for ovens or other units
IPC: G05D23/02
Filed: 1933-02-21
Abstract: 416,925. Fluid -actuated valves. RALPH, J., 23, Albert Road, Worcester. Feb. 21, 1933, No. 5267. [Class 135.] Valves controlled by pilot or relay valves.- Means for controlling the supply of heating fluid to a consumer by means of a thermostat 28 located in the consumer comprises a valve 4 controlling the flow of heating fluid and actuated by a piston 11 exposed on either side to the pressure in the pipes 1, 2. The main 3 is connected by a pipe 5 to a chamber 8 connected by restricted passages 6, 7 to the ports 9, 10 and the pipes 1, 2. The pipes 1, 2 are connected to a valve casing and the outlets are alternately connected to an exhaust port 15 by means of a shuttle valve 23 actuated by the thermostat 28. The position of the valve 23 may be varied relatively to the thermostat by adjusting the member 38 and so altering the longitudinal position of the valve 23 on its spindle 30. The seat 21 of the valve 23 is resiliently mounted so that when the heat is shut off from the consumer the seat may move with the valve under the action of the thermostat.
Patent GB-105268-A (GB)
Title: Improvements in Internal Combustion Engines.
Inventor: FORSEN BERTIL
IPC: F01L5/10
Filed: 1916-04-13
Abstract: In an engine provided with a sleeve valve D sliding between the piston C and cylinder A and a rotary valve F arranged outside the cylinder, these valves controlling the same port I in the cylinder but the sleeve valve acting only during high-pressure strokes and the rotary valve during low-pressure strokes, the valve F is driven by gearing from the crank-shaft and actuates the valve D through an eccentric M and pitman rod N.
Patent GB-823062-A (GB)
Title: Improvements in the colouring of textile materials
Inventor: FINLAYSON DONALD
IPC: D06P1/649
Filed: 1956-02-22
Abstract: Textile materials of cellulose acetate (including triacetate) are rendered receptive to dyes or dye components by treating them before or during dyeing or printing with aqueous caprolactam. The caprolactam may be added to the dyebath or to the padding or printing preparation.  Alternatively, the textile may be padded or printed with aqueous caprolactam, dried, washed if desired, and then dyed, a two-tone effect being obtained in the case of local application of the caprolactam.  The textile may be dyed with acid, oxidation and disperse dyes, particularly disperse dyes of the high-temperature, slow-dyeing type, and also with azoic combinations.  In the case of triacetate textiles, these may be wet-, dry- or melt-spun as described in Specifications 687,414, 719,853, 721,674, 726,900, 731,930 and 748,772, [all in Group IV (a)], or they may be made by the further acetylation of lower acetylated fibres as described in Specifications 448,816, 448,817 and 448,917, [all in Group IV]. Triacetate fibres may have been treated as described in Specification 758,442, [Group IV (a)], to raise their safe ironing point.  The Provisional Specification refers also to the use, instead of caprolactam, of 2-pyrrolidone or of an aliphatic carboxylic acid open-chain amide such as acetamide or N-methyl- or N-ethyl-acetamide. Specifications 770,460 and 813,610 also are referred to.
Patent GB-1138284-A (GB)
Title: Spray deposition of silicon powder structures
Inventor: PARR NORMAN LAWRENCE
IPC: B05B7/20
Filed: 1966-02-09
Abstract: 1,138,284. Silicon and silicon nitride articles. NATIONAL RESEARCH DEVELOPMENT CORP. 31 Jan., 1967 [9 Feb., 1966], No. 5565/66. Heading B5A. [Also in Divisions C1 and C7] Silicon and silicon nitride articles are made by spraying silicon particles on to a preheated former coated with a soluble release agent to form a silicon compact and immersing the former and compact in a solvent to dissolve the release agent and release the compact. The compact may then be dried and heated in an atmosphere of ammonia or nitrogen to convert it to silicon nitride. The silicon is sprayed from a high velocity oxyhydrogen or oxyacetylene flame spray gun and the release agent and solvent are preferably sodium chloride and water respectively. The former may be rotated or reciprocated and the gun moved synchronously with the former to yield an even deposition of powder. The silicon compact may be partially nitrided, machined and then fully converted to the nitride. Articles such as shells, casings, bushes, crucibles, rodomes, heat shields and thermocouple sheaths may be made by this process.
Patent GB-1148644-A (GB)
Title: Improvements relating to protective circuit arrangements
Inventor: BEASOR FRANK DAVID
IPC: H04M19/00
Filed: 1967-02-06
Abstract: 1,148,644. Electrically released switches. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 2 Feb., 1968 [6 Feb., 1967], No. 5596/67. Heading H1N. [Also in Division H2] An electrically released switch is formed by a fuse wire 8 connected between spring members 4, 6 mounted on terminals 1, 2 and extending on opposite sides of an insulating board 3, the wire 8 passing through a hole 7. When the fuse blows, the member 4 springs down to engage a fixed contact 10 and the member 6 moves into a vertical position to display a flag indicator 9.
Patent GB-1420563-A (GB)
Title: Process for manufacturing polyol esters of carboxylic acids
IPC: C07C67/00
Filed: 1974-02-07
Abstract: 1420563 Polyol esters LION FAT & OIL CO Ltd 7 Feb 1974 [7 Feb 1973] 05643/74 Heading C2C Polyol esters of carboxylic acids are prepared by reacting a (C 3 -C 30 ) olefin with carbon monoxide and a polyhydric alcohol in the presence of a first catalyst containing cobalt, nickel or rhodium and a second catalyst comprising pyridine or a derivative thereof by heating at an elevated pressure, the first and second catalysts being brought into contact with the carbon monoxide in the presence of the olefin prior to the commencement of the reaction. Suitable first catalysts are the carbonate, octanoate, stearate, hydroxide, oxide, chloride, oxalate, naphthenate, nitrate and sulphate of cobalt, nickel or rhodium. The reaction is preferably carried out at a temperature of from 90‹ to 250‹ C. and a pressure of from 90 to 300 Kg/cm<SP>2</SP>.
Patent GB-525390-A (GB)
Title: Improvements in magnetic separators
IPC: B03C1/26
Filed: 1939-02-21
Abstract: 525,390. Magnetic separators. GREAVES, R. Feb. 21, 1939, No. 5712. [Class 72] In a magnetic separator of the shoot type in which the stream of material flows over a series of magnets arranged in steps at successively lower level, the poles 3-8 which are connected by yokes 9, 10 form part of permanently magnetized units A, B, and are provided with undercut or bevelled edges 13. The channelled recesses 13 between the poles are filled with white metal or other non-magnetic material and the units A, B may be connected together by bolts 2. Adjacent poles are arranged so as to have an opposite polarity. In a modification each unit consists of two pole pieces instead of three pieces, connected by a yoke.
Patent GB-586919-A (GB)
Title: Improvements in and relating to bottle capping and to closures therefor
IPC: B65D41/14
Filed: 1944-03-28
Abstract: 586,919. Shaping bottle closures. ENOCK, A. GRAHAM-, and GRAHAM-ENOCK MANUFACTURING CO., Ltd. March 28, 1944, No. 5717. [Class 100 (ii)] [Also in Group XVII] A machine for producing a container or carton of stacked, metal foil, corrugated bottle closure elements, in which two different designs of corrugation alternate (see Group XVII) comprises a pair of presses operating alternately, one press producing one design, the other press producing the other design, and both delivering to guide means which feed the elements to the container. Diametrically opposed cams, on a shaft 30, reciprocate die plungers 33 (not shown), 34, co-operating with dies 35 (not shown), 36, to form the elements from a strip. The formed elements slide down a chute 37, between convergent walls 38, and into a bell-mouthed sleeve 39 located above that container 40 in which the discs are being stacked. The containers 40 are mounted in a rotary head carried on a spindle 41 by arms 42, 43. The lower, spring urged, pivoted arms 43 are provided with open ended shelf members 44. Diametrically disposed side guides or ramps on the sleeve 39 help to position the containers 40. Two opposed series of presses may be provided.
Patent GB-1535560-A (GB)
Title: Automatic control circuitry
IPC: H02P29/00
Filed: 1976-02-13
Abstract: 1535560 Automatic control systems SIEMENS AG 13 Feb 1976 [12 March 1975] 05837/76 Heading G3R [Also in Division G4] Automatic control circuitry for apparatus S having a finite response time has two parallel paths for the desired value signal W, one path having a delay circuit N and an integral action controller R and the other path by-passing these elements. The time constant of the circuit N is made equal to the response time TO of the apparatus; thus, when W is changed the resulting disturbance in a feedback signal x, which would be integrated at R and cause instability, is cancelled by the output of N at the appropriate instant. P is an amplifier whose gain matches that of the apparatus and K is a non-linear circuit whose characteristic is the inverse of that of the apparatus S, so as to make the overall response linear. M is an optimal "modulator" to compensate the gain of the control loop with that of circuit K. A particular embodiment is described Fig. 2 (not shown) in which the apparatus comprises a thyristor converter which energizes a D.C. motor from an A.C. supply, the motor current being retroactively controlled by firing angle adjustment of  the thyristors.. In this embodiment an additional control signal is provided, obtained from the difference between the input and output of the delay circuit N, applied via an amplifier whose gain is set in accordance with the tune constant of the armature circuit. The "modulator" includes operational amplifier circuits for obtaining the cube root of the desired current Fig. 4 (not shown). In an alternative to Fig. 1 the "modulator" is omitted and both the feedback signal and the output of N are applied via non-linear circuits corresponding to K Fig. 5 (not shown).
Patent GB-1127974-A (GB)
Title: Chromium-containing reactive azo dyestuffs
Inventor: HALL FRANK
IPC: C09B62/477
Filed: 1966-02-10
Abstract: 1,127,974. Compounds containing #-carboxyacryloylamino groups. IMPERIAL CHEMICAL INDUSTRIES Ltd. 27 Jan., 1967 [10 Feb., 1966], No. 5897/66. Addition to 947,647. Heading C2C. [Also in Division C4] 1 - [4<SP>1</SP> - (# - Carboxy - acryloylamino) - phenyl]- 3 - methyl - 5 - pyrazolone, 2 - (# - carboxy - acryloylamino) - 5 - naphthol - 7 - sulphonic acid, 4 - (# - carboxyacryloylamino)- 1 - naphthol and 2 - (# - carboxy - acryloylamino) - 8 - naphthol-6- sulphonic acid are prepared by reacting the corresponding amine with maleic anhydride.
Patent GB-1021433-A (GB)
Title: Process for the preparation of ammonium nitrate and dicalcium phosphate
IPC: C05B11/06
Filed: 1964-02-12
Abstract: Dicalcium phosphate and ammonium nitrate are prepared by dissolving unwashed Ca(NO3)2. 4H2O, separated from nitrate-type phosphate rock decomposition products, in a 10 to 80% NH4NO3 solution to form a solution containing NH4NO3 and CaO in molar ratio from at least 0.25 : 1 to 5.2 : 1, neutralizing the solution with ammonia over a period of at least 20 minutes at temperatures of 60 to 100 DEG  C. and with vigorous agitation, until it has a pH of 6.0 to 6.9, filtering the neutralized solution, mixing with the filtrate 0.47 to 0.53 mole per mole of CaO of P2O5 in the form of a substantially fluorine-free solution or suspension containing 15 to 45% of P2O5 as (NH4)3.PO4, at a temperature of 30 DEG  to 90 DEG  C., vigorously agitating the reaction mixture and leading ammonia into it at a temperature of 30 DEG  to 90 DEG  C. until the dicalcium phosphate stops precipitating, separating the dicalcium phosphate from the reaction mixture and obtaining NH4NO3 from the filtrate by evaporation. The P2O5 and fluorine present in the unwashed Ca(NO3)2.4N2O in quantity 1 to 3% and 0.5 to 1.2% respectively are essential.  The CaHPO4 of the invention generally contains less than 0.1% F and the process removes other harmful materials e.g. As, Sb, Pb and Fe.  Part of the NK4NO3 solution obtained may be used for dissolving more Ca(NO3)2.4H2O, the remainde being evaporated to obtain the salt or, alternatively, salt melts.
Patent GB-112364-A (GB)
Title: Improvements in and relating to a Combination or Assemblage of Domestic Heating, Cooking, Boiling and Washing Devices.
Inventor: RUTTER JOHN MIDDLETON
IPC: F24C13/00
Filed: 1917-04-27
Abstract: 112,364. Rutter, J. M. April 27, 1917 Addition to 17829/15. Cooking-ranges; canopies.-In a modification of the stoves described in the parent Specification and Specification 106,015, an auxiliary boiler d<1> is fitted either under or over the ovens D. The stoking-door g<4> of the " boot " boiler F is enclosed by a canopy or cover g<5>, through which smoke escaping past the edges of the door finds its way, by means of a short flue k<1>, to the chimney. The canopy may be hinged at its top edge, as shown, or on one side, and has a bottom end plate g<8>, and may have also a hit-and-miss air-inlet regulator g<7>, which, in conjunction with the door g<4>, or with other means, may be used to regulate the draught through the boiler.
Patent GB-549965-A (GB)
Title: Improvements in or relating to electromagnetic interrupters
IPC: H02M7/62
Filed: 1941-05-08
Abstract: 549,965. Converting. GRASEBY, R. C. May 8, 1941, No. 5974. [Class 38 (ii)] [Also in Group XXXVII] A pulsating current of a desired frequency is obtained by connecting up two electromagnets 2, 3 in series with a D.C. source 24, 25, through interrupter contacts 13 on a, tuned reed 11 controlled by one of the electromagnets 2, the tuned reed 27 of the other electromagnet 3 serving to transmit at contacts 32 a pulsating current to terminals 44, 45, 46 which are connected to a synchronous motor. By this arrangement, the contacts on the reed 11 control only light currents and the frequency of the reed is not affected by them, while the reed 27 cannot fail to keep in synchronism with the reed 11. The natural frequency of vibration of reeds 11, 27, may be adjusted by movement of a nut at the end of the reed or by movement of the magnetic mass 12 or 29 along a slot in the reed. The apparatus may be kept at a uniform temperature by a thermostat.
Patent GB-814883-A (GB)
Title: Improvements in or relating to means for stabilising the voltage or current output of electrical apparatus
Inventor: PATCHETT GERALD NORMAN
IPC: G05F1/42
Filed: 1954-03-01
Abstract: 814,883. Automatic voltage and current control systems. TINSLEY & CO. Ltd., H. June 1, 1955 [March 1, 1954], No. 5981/54. Class 38 (4). [Also in Groups XXXIX and XL (c)] The output voltage or current of an amplifier or oscillator is stabilized by a voltage-sensitive bridge connected to the output and providing negative series feedback when the output is high, and positive series feedback when the output is low. The output signal of an amplifier 1 (of unspecified type) is applied across one diagonal of a bridge 10 which includes a thermistor 18 in one arm. Alternatively, for current control, the bridge is connected across a resistor which is in series with the load. The other diagonal of the bridge is connected in series with the secondary of an input transformer 21 and, as the bridge is balanced for a predetermined amplifier output, any departure provides a correction voltage of appropriate sense. If the apparatus is to be operated at low frequencies, a parallel-T filter may be included at 31 to remove any third harmonic appearing in the output of the bridge. The amplifier may be tuned to the frequency of the input. Should the circuit provide sufficient positive feedback, the system functions as an oscillator. A triode 25 opens a relay 32 whilst the bridge is initially warming up, and so prevents the application of excess voltage to the load. In a modification, Fig. 3 (not shown), one arm of the bridge is formed by a phase-splitter valve. Specification 669,306 is referred to.
Patent GB-283366-A (GB)
Title: Improved hand tool for cutting sheet metal or other sheet materials
IPC: B25D3/00
Filed: 1927-03-04
Abstract: 283,366. Jaques, F. W. March 4, 1927. Chisels.-A chisel for cutting sheet metal has a shank a terminating in a straight or bent tapered portion b with a concave end with two sharp projections c.
Patent GB-703677-A (GB)
Title: Improvements in or relating to stoppers for bottles
Inventor: JACKSON JOHN MAXWELL
IPC: B65D39/16
Filed: 1952-03-07
Abstract: 703,677. Stoppers. METAL BOX CO Ltd Feb. 4, 1953 [March 7, 1952], No. 6064/52. Class 125(3) A hollow bottle stopper has an integral shive and head portion 1 moulded from artificial resinous material such as polythene, the stopper being closed at the lower end 2 but open at the head 3 which opening is covered by a dished metal cover 4 bearing printed matter 5 and having its sides inturned against the head to retain it in position. In a modification, Fig. 2, the head has a groove 7 into which the sides of the cover are turned and below the groove the head has corrugations 8 forming a finger grip. In the stopper of Fig. 1 the cover 4 has corrugations 6 and in another modification both cover and head have co-operating corrugations to prevent relative rotation.
Patent GB-417121-A (GB)
Title: Improvements in or relating to cable lacquers
IPC: C09D101/12
Filed: 1933-02-28
Abstract: A lacquer suitable for cables comprises a solution of cellulose acetate in a volatile solvent, and di-b -methoxy ethyl phthalate as a plasticiser.  The proportion by weight is preferably 4--7 parts of the plasticiser to 4 parts of cellulose acetate.  A known plasticiser e.g. diglycerol tetracetate may also be added. Suitable solvents are methyl acetone or acetone, with or without benzol or industrial spirits.
Patent GB-1455604-A (GB)
Title: Aftertreatment process of dyed or printed textile substrates
IPC: D06P5/20
Filed: 1974-02-11
Abstract: 1455604 Electrostatic spraying in dyeing textiles SANDOZ Ltd 11 Feb 1974 [16 Feb 1973] 06123/74 Heading D1B Fixation and developing agents employed in the dyeing or printing of textiles are electrostatically sprayed onto the material after application of the dye. Cotton materials are dyed or printed with reactive, vat or leuco-sulphuric acid ester dye. The fixing agents may be alkali hydroxides, alkali carbonates, alkali bicarbonates and ammonium carbonate which are used in a concentration of 0.5 to 20% by weight for fixation of reactive dyes, strong acid e.g. sulphuric acid plus an oxidising agent being used to develop leuco-sulphuric acid esters, alkali and reducing agents being used for vat dyes. The electrostatic field may be produced using a potential difference in the range of 30 to 150 kV.
Patent GB-1490374-A (GB)
Title: Process for isolating formic acid
IPC: C07C51/00
Filed: 1975-02-14
Abstract: 1490374 Formic acid BASF AG 14 Feb 1975 [15 Feb 1974] 6318/75 Heading C2C [Also in Division BIB] Formic acid is isolated from a mixture of methyl formate, water, methanol, and formic acid by fractional distillation in a column wherein the starting mixture is fed into the upper half of the column, and a zone of 5 to 15 theoretical plates is maintained above the feed point and a mixture of water, methanol and methyl formate is withdrawn at the top and a zone of 10 to 25 theoretical plates in which the formic acid increases until the mixture reaches the composition of formic acid/water azeotrope is maintained below the feed point. The formic acid is preferably withdrawn as vapour above the bottom of the column and any high-boiling constituents discharged at the base. Examples describe the use of a 20 theoretical plate bubblecap plate and a 31À5 theoretical plate sieve plate column.
Patent GB-1535231-A (GB)
Title: Oscillator circuit
IPC: H03K3/027
Filed: 1976-02-18
Abstract: 1535231 Pulse oscillator circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 18 Feb 1976 [21 Feb 1975] 06372/76 Heading H3T In a self-triggered pulse oscillator circuit including a single non-inverting logic gate 12 and an oscillator element such as crystal 15 connected as a series resonator between the output and input of the gate the element 15 is constructed so that a phase difference of less than 45 degrees occurs in operation between signals at its input and output terminals, an output 22 of a circuit loop containing the gate and the element is connected to an input of a second logic gate 13 and the output of gate 13 is connected via an integrating network 18, 19 to the non-inverting logic gate for setting the relationship between the standing level at its input and its transfer characteristic so that the standing level lies in the centre of the logic changeover region of the characteristic. The oscillator includes a Schottky AND gate 12 and a NAND gate 13 and oscillation can be stopped by appropriate signals to 20, 21. Output can be from 38 via a delay element and inverting gates 36, 37 and also from 34. In a further embodiment (Fig. 3, not shown) a capacitor (23) in parallel with the crystal 15 short circuits higher harmonics than the required fundamental or e.g. third harmonic output (30, 31) from NAND gates (24, 25). Oscillation can be stopped by appropriate input at (29) to block gate 13. Schottky TTL gates or ECL gates can be used. The oscillator can be used to generate clock pulses.
Patent GB-527015-A (GB)
Title: Improvements in treads for pneumatic tyres
IPC: B60C11/03
Filed: 1939-02-27
Abstract: 527,015. Wheel tyres. DUNLOP RUBBER CO., Ltd., and ATTWOOD, J. A. Feb. 27, 1939, No. 6381. [Class 144 (ii)] A pneumatic tyre tread comprises a series of circumferential ribs 1, 2, 5 with transverse slits extending from the intervening grooves 3, 4 partially across the ribs. Along the median line of the tread, slits 6 in the rib 1 have outwardlyconvergent walls and curved bases merging into the axially-outer walls of the grooves 3. Alternating with the slits 6 are pairs of slits 9 which extend from the inner walls of the grooves 3 and present outwardly inclined walls 11 in the ribs 2. Mating with the slits 9, and extending from the outer walls of the ribs 2, are slits 12 whereby portions 15 of these ribs overhang the bases 13 of the slits 12. Similarly-overhanging , portions 24 are formed in the outermost ribs 5 by mating slits 16, 20. As shown, the slits extend into the tread beyond the bottoms of the grooves 3, 4.