baber/WOPTO huggingface dataset:
Patent GB-812321-A (GB)
Title: Improvements in and relating to machines for thinning or hoeing rows of plants
IPC: A01B41/02
Filed: 1957-08-06
Abstract: 812,321. Agricultural implements. LANDBOUWWERKTUIGEN-EN MACHINEFABRIEK H. VISSERS N. V. Aug. 6, 1957 [Sept. 4, 1956], No. 24711/57. Class 6(1). A machine for thinning rows of plants comprises rods 9 each rotatably mounted in a holder 8 pivoted about a transverse shaft 16. The rods 9 carry blades 11 mounted on vertical shafts attached to the rods 9. Each rod 9 is oscillated by means of an inclined disc 4 attached to the shaft 16. A ring 14 is rotatably journalled in a circumferential groove in the disc 4. The rod 9 is attached to a forked end 13 which is pivotally attached by studs 15 to the ring 14. Specification 788,389 is referred to.
Patent GB-1035477-A (GB)
Title: Improvements in or relating to aerials for use in the electrical transmission and reception of transient visual images
IPC: H01Q19/04
Filed: 1963-06-21
Abstract: 1,035,477. Aerials. A. FLAHERTY. Sept. 17, 1964 [June 21, 1963], No. 24718/63. Heading H4A. In a Yagi type aerial in which directors 14, 15, 16, a dipole 12 and a reflector 17 are mounted on a boom 11, the dipole and/or the reflector are augmented by two or more parallel tubes or rods connected by bridging or spacing members. As described, a length of tubing formed into a substantially rectangular shape is secured to the reflector 17 by clamps 20, 21 which engage with its short sides 18a, 19a, and are tightened by screws 20<SP>1</SP>, 21, Fig. 2 (not shown), so that its long sides 18, 19 are parallel to the reflector 17. Strengthening members 22 are provided between the sides 18, 19. The dipole 12 is mounted on the boom 11 by an insulator 13 and is similarly provided with parallel members 23, 24 connected to it by clamps engaging bridging members 23a, 24a. The members 18, 19 may be rotated about the axis of the reflector 17 or may be moved sideways relative to it, Fig. 2 (not shown), and the members 23, 24 may be rotated about the axis of the dipole 12. It is stated that such adjustments of the positions of the members provide means for reducing " ghosts " in the case of a television receiving aerial. More than two additional tubes may be provided for the dipole and/or reflector. The assembly may be modified by reversing the central strengthening member 22 of the reflector and securing it directly to the boom 11 by a U-clamp.
Patent GB-649409-A (GB)
Title: Improvements in polymers
IPC: C08F2/00
Filed: 1948-09-22
Abstract: Copolymers are made by heating a mixture of a beta-(2-propenoxy-)alkyl polyester of a polycarboxylic acid and a compound of the formula R.CH=CH-CH2X or CH2=C(R)-CH2X, where R may be hydrogen, chlorine, methyl, chloromethyl or ethyl, and X may be hydroxyl, chlorine, alkoxy, cycloalkoxy, aryloxy, aralkoxy or acyloxy.  The mixture may include an organic peroxide and another copolymerizable olefinic unsaturated monomer.  The reaction may be halted at any desired stage, e.g. by chilling.  The polycarboxylic acid may be saturated or unsaturated, e.g. oxalic, malonic, succinic, glutaric, sebacic, adipic, tricarballylic, phthalic, muconic, anhydromuconic, aconitic, maleic, fumaric, itaconic, citraconic or mesaconic acid.  Specified esters are di-(beta-(2-methallyl)oxyethyl) maleate, the di-(beta-allyloxyethyl) esters of maleic, fumaric, itaconic, adipic, mesaconic and citraconic acids, and tri-(beta-allyloxyethyl) aconitate.  Specified compounds of the above two types are allyl chloride, crotyl chlorides, 1,3-dichloropropene, 2,3 - dichloropropene, 1,4 - dichlorobutene-2, 2-(chlormethyl)allyl chloride, allyl and methallyl alcohols, 2-chloroallyl alcohol, crotyl alcohol, 2-ethylallyl alcohol, allyl methyl ether, methallyl ethyl ether, beta-allyloxyethanol, allyl propyl ether, methallyl butyl ether, methallyl amyl ether, methallyl heptyl ether, allyl octyl ether, crotyl ethyl ether, 2-chlorallyl ethyl ether, methallyl phenyl ether, allyl benzyl ether, allyl acetate, allyl chloracetate, 2-chlorallyl propionate, methallyl butyrate, and ethallyl valerate. The copolymerizable monomer may be styrene, dichlorstyrenes, alpha - methyl styrene, p - methyl styrene, vinyl naphthalene, isobutylene, vinyl chloride and butyrate, vinylidene chloride, acrylonitrile, beta - chloroethylacrylate, acrylamide, methacrylamide, methyl methacrylate, methyl-alpha-chloracrylate, methacrylonitrile, N-vinyl phthalimide, diethyl and dibutyl fumarates, diallyl fumarate, dihexyl itaconate, dimethyl mesaconate, dimethyl citraconate, methyl vinyl ketone, vinyl n-butyl ether and isopropenyl methyl ether.  Specified peroxides are benzoyl, acetyl, acetyl benzoyl, succinyl and t-butyl hydroperoxide.  The copolymers can be isolated from the reaction mixture by precipitation with a non-solvent, e.g. n-hexane, diethyl ether and mixtures.  Surfaces, e.g. wood and glass, may be coated and/or impregnated with a solution of the copolymers in a volatile solvent, e.g. xylene, butanol, acetone, to which may be added driers, e.g. cobalt naphthenate, dyes, pigments, fillers and plasticizers. After removal of the solvent, the coating may be converted to the hard infusible stage, e.g. by air drying, preferably in the presence of peroxy compounds or by heating.  The copolymers may be moulded, admixed with fillers, pigments and monomers, e.g. methyl methacrylate, styrene, diethyl fumarate, diallyl fumarate, and the mixture converted to the infusible stage by heat and/or polymerization catalysts.
Patent GB-1038437-A (GB)
Title: Method of and means for introducing water proofing material into brickwork or other structural masonry
Inventor: KEMP ALBERT EDWARD
IPC: C04B41/45
Filed: 1965-06-11
Abstract: 1,038,437. Damp-proofing brickwork. PETER COX PRESERVATION CO. Ltd. June 11, 1965, No. 24809/65. Heading E1S. Brickwork is damp-proofed by a liquid fed into it by a perforated tube in a hole in the brickwork and surrounded by a porous material e.g. sponge rubber, foamed plastics or porous plaster set round the tube while in the hole. The porous material may be in the form of discs threaded on the tube. An expansible washer may seal the tube in the hole. The liquid may be a solution of sodium methyl siliconate or methyl phenyl polysiloxane which contains sodium orthorphenylphenate or orthophenyl phenol included as a fungicide.
Patent GB-690241-A (GB)
Title: Improvements in nickel chromium iron alloys
IPC: C22C19/05
Filed: 1950-10-11
Abstract: A nickel-chromium-iron alloy contains Ni 30-70 per cent, Cr 10-25 per cent, Ca .01-20 per cent, Al .07-0.4 per cent, rare earth metals a trace to .50 per cent and the balance iron.  The rare earth metals may be added as "misch metal," and the alloy may also comprise Mn .02-4.0 per cent, Si 20-3.0 per cent and/or C up to 0.25 per cent. The alloys may be used for electric resistance units.  Specifications 459,390, 465,594, 507,167 and 621,343 are referred to.
Patent GB-947645-A (GB)
Title: Means for indexing the main spindle in automatic lathes through predetermined angles
IPC: B23Q16/06
Filed: 1960-07-15
Abstract: 947,645. Lathes. E. HAHN, [trading as INDEX WERKE KOMM GES. HAHN & TESSKY]. July 15, 1960 [Aug. 6, 1959], No. 24816/60. Heading B3T. An automatic lathe comprises means 88 for indexing the main spindle 19 including a grooved disc 325 on the spindle 19 co-operating with a lever 320, and means 338 for preventing the engagement of a groove except at an indexed position. A lathe having a capstan slide (not shown) has a milling cutter 312 on a slide 110 to mill a triangular end on a workpiece 305. Gears 32 and 33 are rotated in opposite directions or at different speeds and are engaged with the spindle by a clutch 26, 27 operated by a lever 36 and a cam 38 on a reversing shaft 43 having a quick-action clutch 42. A gear 85 can be rotated by the motor 88 through an electric clutch 87 to rotate the discs 325, 338. The bell-crank 320 carrying a tooth 329 is held clear of the disc by a bell-crank 203 acting against a spring 280, the bell-crank 203 being connected to a lever 55 by a link 70 carrying a dog for engaging a switch 75. The bell-crank 320 is also connected by a link 205 to a lever 279 carrying a pawl 90 which may engage dogs 420a-420c on a shaft 97 rotated from the shaft 43. When the spindle is to be stopped, the clutch 26, 27 is moved to a neutral position causing the lever 55 to be released and the switch 75 operated to cause the motor 88 to try to rotate the spindle at a slow speed in the opposite direction. When the spindle has been reversed, a pin 340 on the bell-crank 320 slides, into a recess 339 and the tooth 329 engages a recess 326 in the disc 325. A milling operation then ensues. When a dog 420a strikes the pawl 90, the tooth 329 is released and the spindle again rotates until the tooth drops into the next recess. The disc 338 is made in two halves bolted together so that it can be replaced to allow different recesses 326 in the disc 325 to be selected. If it is desired to select a particular groove as the first one to be operative, an additional disc 360, Fig. 8, is provided, and a spring- pressed plunger 376 is provided on the bellcrank 320. The bell-crank is not allowed to fall until the plunger 376 engages a groove 365 and rides along an incline 366 and on to the face of the disc 360, thus rendering it ineffective. In a further modification, the plunger 415, Fig. 17, rides up an incline 405, Fig. 16, and then acts as the pin 340 of Fig. 2. Specifications 897,036 and 898,598 are referred to.
Patent GB-665568-A (GB)
Title: Electric circuit-condition indicators
Inventor: TAYLOR HAROLD CHARLES
IPC: B60Q11/00
Filed: 1949-09-28
Abstract: 665,568. Lamp-failure alarms. LUCAS, Ltd., J. Sept. 20, 1950. [Sept. 28, 1949] No. 24835/49. Class 118 (ii). An electric indicator for indicating the condition of either of a pair of side (or rear) lights on a vehicle comprises two similar coaxial coils a and b are arranged in opposition and respectively connected in series with one of the lights. A pivotted disc c of translucent material carries an iron armature d similar to the kind used in moving iron meters which is acted on by the resultant field of the coils to rotate the disc. A fixed permanent magnet e provides the restoring force. A lamp f which may be controlled by the same switch as the side lights is mounted so as to direct a beam of light through the disc c to provide a visual indication at transparent window h. Parts of the periphery of the disc are differently coloured so that when both lights are in operation a different colour is shown through the window to that shown when one or other of the circuits fails and one of the coils is de-energized so causing the rotation of the disc to a different position. The coils may be arranged to exert equal and opposite actions on the armature or be out of balance so as to effect a certain angular movement of the disc when both lights are functioning.
Patent GB-1261353-A (GB)
Title: Production of carbon filaments
Inventor: LOVELL DONALD ROBERT
IPC: D01F9/14
Filed: 1968-05-24
Abstract: 1,261,353. Induction heating apparatus. MORGANITE RESEARCH & DEVELOPMENT Ltd. 25 Aug., 1969 [24 May, 1968], No. 24886/68. Heading H5H. [Also in Division C1] A radio frequency induction heating system e.g. coil 4 is provided with a generally cylindrical susceptor 1 of e.g. impermeable graphite, the wall thickness of the susceptor being less towards the centre of the susceptor than away from it. The susceptor, which is held in place by e.g. a refractory material 2 enclosed within an outer furnace wall 3, may be of the shape illustrated or e.g. there may be a length of wall extending from the centre of evenly reduced wall thickness, terminating in an end portion of evenly increased wall thickness. The susceptor, which should have a permeability as low as possible, is used for graphitizing carbon filaments (see Division C1).
Patent GB-448211-A (GB)
Title: Pneumatic torque transmitters
IPC: F16D31/08
Filed: 1935-09-06
Abstract: 448,211. Pneumatic power transmission. RUTH, J. P., 423, Continental Oil Building, 1755, Clenarm Place, Denver, Colorado, U.S.A. Sept. 6, 1935, No. 24907. [Class 8 (ii)] A shaft 5 rotates an air-tight casing 9 containing compressor cylinders fixed in flanges 15, 16 on the casing, and the pistons drive a shaft 8. The compressors draw air from the interior of the casing through slots uncovered by the pistons, and discharge into the casing through spring valves. A passage 38 in the shaft 8 is connected with the interior of the casing and with a manual valve 46, allowing the casing to be opened to atmosphere or to pressure or vacuum tanks 49, 50. A gear pump 58 actuated by worm gearing from the shaft 8 delivers oil to the shaft bearings &c. through pipes 65. 66, 67. The piston compressors may be replaced by bellows. The driving and driven shafts may he interchanged.
Patent GB-1101694-A (GB)
Title: Die-casting apparatus
IPC: B22D17/04
Filed: 1966-06-03
Abstract: 1,101,694. Casting machines. A. HADWED. 3 June, 1966, No. 24936/66. Addition to 985,153. Heading B3F. In the die-casting machine of the parent Specification the means for arresting the returning movement of plunger 21 after it has been moved downwards to inject molten metal into the mould cavity between the dies 27, 19, comprises a latch arm 56 that is moved to engage an abutment 52 adjustably arranged in the operating rod 21a of the plunger 21. The latch arm is moved to the engaged position when the moving die closes with the fixed die 19 by a spring-biased rod 58 attached to the latch arm 56 and the moving die block 12. Alternatively, the latch arm 56 may be biased by a weight (66) (Fig. 6, not shown) or the latch may comprise a solenoid operated stop (113) (Fig. 7, not shown) engaging a lug (112) mounted on the plunger operating rod 21a. Electropneumatic circuits (Figs. 5 and 7, not shown) are used to control the sequence of operations of the machine.
Patent GB-1163883-A (GB)
Title: Tractor Vehicles
Inventor: THWAITES ARTHUR HENRY
IPC: B62D33/06
Filed: 1966-06-03
Abstract: 1,163,883. Vehicle movers; fifth wheel couplings. ALEXANDER STEPHEN & SONS Ltd. 1 June, 1967 [3 June, 1966], No. 24937/66. Headings B7H and B7T. A tractor vehicle for use with a trailer having a fifth wheel connection has road wheels 5, 8 at both ends, all of which are driven, and a releasable connecting means 21 which is adapted to connect the tractor for towing the trailer to the fifth wheel connection, is arranged to permit relative pivoting about a vertical axis between the tractor and trailer, and is movable between vertically displaced raised and lowered positions. The connecting means 21 is pivotally mounted between the front and rear wheels of the vehicle on a pair of arms 18 which are movable about pivots 19 by hydraulic rams 23 whereby the connecting means 21 may be raised into engagement with and lift a fifth wheel plate of a semi-trailer. The vehicle engine 2, gearbox 3 and transmission housing 4 are mounted as a unit and the steerable front wheels are driven through shafts 9 from the housing 4. A driver's cab 11, with seats 12 for driving in either direction, is mounted in front of and to one side of the engine 2.
Patent GB-1015858-A (GB)
Title: Container sealing nozzles and method of preventing build-up thereon
IPC: F02M65/00
Filed: 1964-06-16
Abstract: 1,015,858. Spray-producers. W. R. GRACE & CO. June 16, 1964 [June 28, 1963], No. 24949/64. Heading B2F.  A nozzle 10 suitable for use in a lining machine for applying sealing compositions to closures comprises a tip 13 provided with a discharge orifice and a capillary tube 16 arranged to conduct a liquid from a reservoir 18 to the exterior surface of the tip so that the liquid wets the surface of the emerging jet of sealing composition and reduces or eliminates blockage of the nozzle orifice. The liquid sheath is preferably the base of the sealing composition. The tube 16 fits through a small hole 17 bored in a nut 15 which holds the tip 13 in place. The tip may be provided with a wind shield, Fig. 2 (not shown) or provided with a channel, notches, or a cutaway face, Figs. 3-5 (not shown), to ensure an even distribution of the liquid if the nozzle is rotated or inclined. The material of the tip at the orifice may be ground to a fine edge and the orifice may be inclined to the nozzle axis, Fig. 7 (not shown), to produce shoulder linings.
Patent GB-930101-A (GB)
Title: Improvements in or relating to air-break circuit-breakers
IPC: H01H9/44
Filed: 1958-08-02
Abstract: 930,101. Arc-rupturing in switches. WHIPP & BOURNE Ltd., and L. W. STOBART. July 30, 1959 [Aug. 2, 1958], No. 24972/58. Class 38 (5). An air-break circuit-breaker has polepieces 24 embracing an arc-chute 21 and extending from a single yoke 22 at the end of the arcchute remote from the fixed contacts 10, 12 so that the movable contacts 11, 13 approach the yoke when the contacts are opened, a single blow-out coil 23 being mounted on the yoke and being connected in series with the contacts at least upon their separation. Thus when the contacts are opened the moving contacts move towards the region in which the magnetic field due to the blow-out coil is strongest, so that the arc is blown more uniformly along arc runners 20, 30 into the arc-chute than is the case when the yoke is adjacent the fixed contact. The coil 23 may be connected between the fixed main contact 10 and the fixed arcing contact 12. The arc-chute may be provided with arc splitters.
Patent GB-1056621-A (GB)
Title: Retarding compositions for concrete mixes
IPC: C04B28/02
Filed: 1965-06-14
Abstract: Set-retarder compositions for concrete mixes comprises a set-retarder for the tri-calcium silicate component of the cement such as a lignosulphonic acid or sodium, calcium or ammonium salt, gluconic acid or its sodium or potassium salt, adipic acid or its sodium or potassium salt, tetrahydroxy adipic acid or a salt thereof, or salicylic acid, together with a water-soluble sulphate; the latter is defined as a sulphate having water solubility at 25 DEG  C. of at least 1 gm./100 cm.3  Sodium, potassium and ammonium sulphates are specified.  The soluble sulphate may constitute 0.02-0.10% by weight of the dry cement weight and is in a weight ratio of 2 : 1 to 1 : 6 with the set-retarder for the tri-calcium silicate.  The term concrete includes mortars and neat pastes; Portland cement concretes are specified and exemplified.
Patent GB-812026-A (GB)
Title: Improvements in fluid pressure rams
Inventor: MACCARTHY CHARLES PATRICK
IPC: B66B17/20
Filed: 1956-08-16
Abstract: 812,026. Pneumatic rams. DISTINGTON ENGINEERING CO. Ltd. Sept. 19, 1957 [Aug. 16, 1956], No. 25075/56. Class 8(2). [Also in Groups XXIX and XXXII] A ram consists of a fixed piston 6b<SP>1</SP> in a moving cylinder 1b which is rigidly connected to a cylinder 1a in which moves a piston 6a<SP>1</SP>. Lines 15, 14 inside the piston rod 6b supply the space between the two pistons and the space behind the piston 6b<SP>1</SP> respectively. This space is connected by a line 9 to the space behind the piston 6a<SP>1</SP>. A number of such rams may be fixed together on end and the whole runs on wheels 10.
Patent GB-680014-A (GB)
Title: Improvements in or relating to blades for gas-turbine engines
Inventor: KENT NELSON HECTOR
IPC: B23P15/04
Filed: 1949-09-30
Abstract: 680,014. Making turbine blades. ROLLSROYCE, Ltd. Sept. 22, 1950 [Sept. 30, 1949], No. 25264/49. Classes 83 (ii) and 83 (iv). [Also in Group XXVI] In manufacturing turbine blocks of the kind provided with cooling passages extending lengthwise through the blade and its root attachment means, two or more lengthwise blade sections 10a, 10b, with cooling passages 13a, 13b therein, are assembled end-to-end with the passage or passages in one section in register with those in the next section. Dowels 15 are inserted into the adjacent ends of the cooling passages, the sections are then permanently secured together and the dowels finally removed. The dowels may be removed by drilling, or by being driven out of the passages; or the dowels may be formed with extensions 15a by which they are pulled out of the passages. The sections are mounted in a jig 14 for assembly and the sections are joined by welding, the dowels preventing fouling of the cooling passages by weld metal. The ends of the passages at the blade tip may be sealed if the cooling medium is a liquid, or left open if the cooling medium is gaseous. The blade sections may be of different materials.
Patent GB-1081125-A (GB)
Title: Improvements in or relating to conservators for oil-filled transformers
IPC: H01F27/14
Filed: 1965-06-15
Abstract: 1,081,125. Transformers. S. NAKAZAWA and T. NAKAZAWA. June 15, 1965 [July 14, 1964], No. 25334/65. Heading H1T. A conservator 3 for an oil-filled transformer comprises a resilient expansible cell 4 communieating with and containing transformer oil and immersed in pressure balancing oil 13 in said conservator 3. The cell 4 has sealed to its upper peripheral edge a metal or resin covering plate 10, impermeable to oil, water and air, so that as the cell 4 expands and contracts upwards and sideways, the oil 13 expanding and contracting at a similar rate, the cell 4 is always maintained just immersed within the oil 13 and thus does not contact the air space S thereabove. The plate 10 may be sealed to the cell 4 by a rubber binder (Fig. 5), or by spaced connecting cords sealed by binder to the cell (Fig. 6), or the plate 10 may provide the top of the cell 4 (Fig. 2). A vent 7 and a drain cock 16 are provided.
Patent GB-1182359-A (GB)
Title: Improvements in or relating to Novel Benzoic Acid Lactone Ethers
IPC: C07D313/00
Filed: 1967-06-01
Abstract: 1,182,359. Substituted benzoic acid lactones. SYNTEX CORP. 1 June, 1967 [3 June, 1966], No. 25379/67. Heading C2C. Novel substituted benzoic acid lactones of the formula wherein each of R<SP>1</SP> and R<SP>2</SP>, independent of the other, is hydroxy, tetrahydrofuran-2-yloxy, tetrahydropyran - 2 - yloxy or cyclopentyloxy, with at least one of R<SP>1</SP> and R<SP>2</SP> being tetrahydrofuran - 2 - yloxy, tetrahydropyran - 2 - yloxy, or cyclopentyloxy, Z is a carbon-carbon single bond or a carbon-carbon double bond; R<SP>3</SP> is one of the groups =CH 2 , = C = O, = CHNHOH, = C = NNHR<SP>4</SP>, = CHNHR<SP>5</SP>, -NH-C = O, =C=NOH, =C-(OR<SP>7</SP>).R<SP>8</SP>, or in which R<SP>4</SP> is hydrogen, C 1-6  alkyl, carbamyl, or aryl or substituted aryl; R<SP>5</SP> is hydrogen, C 1-6  alkyl, or aryl; R<SP>6</SP> is C 1-6  alkyl, C 2-6  alkenyl, aryl or aralkyl; R<SP>7</SP> is hydrogen, C 1-6  alkyl, or the group -C=O.R<SP>9</SP>, wherein R<SP>9</SP> is C 1-6  alkyl; R<SP>8</SP> is hydrogen, ethynyl, C 1-6  alkyl, aryl or aralkyl, R<SP>7</SP> being hydrogen when R<SP>8</SP> is other than hydrogen, and R<SP>10</SP> is ethylene, 1,2-propylene, or trimethylene are prepared by reacting the corresponding 4,6-dihydroxy compound with dihydrofuran, dihydropyran or a cyclopentyl halide, or by acetylating the appropriate 4,6- dihydroxy compound, separating and then etherifying the resulting 4-hydroxy-6-acetoxy-, or 4 - acetoxy - 6 - hydroxy - derivatives and hydrolysing the thus obtained 4- (or 6-) acetoxy- 6- (or 4-) tetrahydrofuran-2-yloxy- (or tetrahydropyran - 2 - yloxy, or cyclopentyloxy)- derivatives. Therapeutic compositions, having estrogenic and anabolic properties, contain the above novel substituted benzoic acid lactones together with an acceptable carrier. Reference has been directed by the Comptroller to Specification 951,349.
Patent GB-1171727-A (GB)
Title: Stabilized Mixtures containing Phosphoryl Aryl Sulfonamides
IPC: C07F9/165
Filed: 1968-05-28
Abstract: 1,171,727. Stabilizing phosphoryl aryl sulphonamides. STAUFFER CHEMICAL CO. 28 May, 1968 [9 June, 1967], No. 25384/68. Heading C2C. Compounds of the general formula where R is phenyl, p-tolyl, p-chlorophenyl, 3,4- dichlorophenyl, 2,5-dichlorophenyl, 2,5-dimethyl-phenyl or m-nitrophenyl, and R 1  and R 2  are C 1-3  alkyl groups, are stabilized by dispersing therein a Lewis base. Preferred Lewis bases are amines, in particular, N,N,N<SP>1</SP>,N<SP>1</SP>-(tetrakis- 2 - hydroxypropyl) - ethylene diamine. The amount of Lewis base employed is preferably from 0À05 to 1À0% by weight of the sulphonamide.