baber/WOPTO huggingface dataset:
Patent GB-755778-A (GB)
Title: Method of epoxidation
Inventor: GREENSPAN FRANK PHILIP
Filed: 1954-06-01
Abstract: A process for the epoxidation of long chain aliphatic carboxylic acids, carboxylic esters and alcohols having at least 10 carbon atoms in the chain to form oxirane compounds, comprises mixing the acid, ester or alcohol at a temperature below 30 DEG  C. with substantially the theoretical amount of an organic peracid required for the epoxidation of the ethylenic bonds, agitating the reaction mixture for some 1 to 3 hours at a temperature below 25 DEG  C. and then heating the reaction mixture in the temperature range of 50 DEG  to 60 DEG  C. for a period of 1/2 to 2 hours. Peracetic acid is the preferred peracid for the reaction-particularly peracetic acid made from 50 or 90 per cent hydrogen peroxide, when the temperature for the initial mixing is advantageously kept below 25 DEG  C.  The process is applicable to fatty acids, e.g. cotton seed and soybean oil acids, and esters thereof, e.g. esters derived from mono-, di-, tri-and other poly-hydric alcohols such as lower monohydric alcohols and glycerol.  In the examples a number of oxirane compounds are prepared by reacting 40 per cent aqueous peracetic acid with methyl, oleyl and butyl oleate, the methyl ester of soy fatty acids and cottonseed fatty acids, the butyl ester of soy fatty acids and cottonseed fatty acids, cottonseed oil, soybean oil, olive oil, oleic acid and oleyl alcohol.
Patent GB-1091644-A (GB)
Title: Purification of polyolefines
IPC: C08F6/02
Filed: 1966-04-13
Abstract: Catalyst residues are deactivated and removed from a slurry of a crude a  mono-olefin or styrene polymer, prepared with a reduced titanium halide catalyst in the presence of an organoaluminium activator and in the presence of an inert organic diluent, by a process in which the slurry is quenched with an aliphatic alcohol, treated with an alkylene oxide and water, the water being present in an amount up to 1 mole per equivalent of halide in the catalyst and activator and the alkylene oxide being present in sufficient quantity to ensure its presence after the water has reacted with catalyst residues, and then washed with an aqueous liquid.  Three preferred sequences of operation are (i) addition of the water as an alcoholic solution, prior to, or (ii) subsequent to, the addition of alkylene oxide or (iii) addition of the water and alkylene oxide simultaneously in the form of a solution. Suitable alkylene oxides are:  ethylene oxide, propylene oxide, butylene oxide-1,2, butadiene dioxide, pentene oxide-1,2, hexene oxide-1,2, styrene oxide, and glycidol.  The reduced titanium halides, i.e. those having a valency of 2 or 3, may be obtained by reducing e.g. TiCl4 with hydrogen, metallic titanium, titanium monoxide, or an organoaluminium compound to give TiCl3, while further reduction with Grignard reagents, organoaluminium compounds, elemental titanium or aluminium, or aluminium halides gives TiCl2.  In the examples, polypropylene and polyethylene are prepared and purified, the purification including a final steam distillation to remove diluent.  In comparative experiments, (A, B, C) the alkylene oxide is omitted, (F, G) the alkylene oxide is used without water, and (H, I) the alkylene oxide is used without water, and before the alcohol treatment.
Patent GB-779015-A (GB)
Title: Improvements relating to devices for regulating yarn tension
Inventor: KLEIN NORMAN EDWARD
IPC: B65H59/28
Filed: 1954-06-01
Abstract: 779,015. Thread tensioning mechanism. DEERING MILLIKEN RESEARCH CORPORATION. June 1, 1955 [June 1, 1954], No. 16220/54. Class 120 (2). A device for regulating yarn tension comprises a number of alternate fixed and movable tensioning members around which the thread passes in a partial wrap about each member to acquire tension frictionally according to the angle of wrap, a biasing device to urge the movable members in a direction transverse to the general direction of the path of the thread to increase the angle of wrap, which device exerts a force on the movable members which increases as they move in the direction of the force and decreases as they move in the opposite direction, and a pinch tensioning device arranged in advance of the tensioning members to control the entry tension of the thread. In the arrangement shown the fixed members are small plates 2 secured in channels 4 in a base member 6 and the movable members comprise small cylindrical members 8 at one end of each of which is press fitted into a shaft 10 rotatably mounted on the base 6. A pair of tension pads 16 and 18 are mounted on the base 6 and form the inlet tensioning means. One end of a light coiled spring 22 bears against the upper surface of the pad 18 and the other end is welded to the upper end of a stiff wire 24 fixed to the shaft 10. The lower end of the wire 24 is bent downwardly and carries at its lower end a vein 26 which is disposed in a dashpot 28 to dampen the movements of the shaft 10. A fine strong cord 52 is connected to the lower end of the wire 24 and at its upper end to a spring 50 connected to the lower end of a screw 44 which is adjustable in a bracket 30. Thus the tension of the spring 50 acting through the cord 52 and wire 24 tends to rotate the shaft 10 in a direction to force the fingers 8 downwardly between the fixed elements 2 and to increase the pressure applied by the spring 22 to the upper tension pad 18. When the shaft 10 is rotated as a result of an increase in the tension in the yarn, the spring 50 is extended and hence the tension thereof is increased. At the same time however the distance between the axis of shaft 10 and the cord 52 is decreased and the resultant effect is that the effective restoring moment acting on shaft 10 is substantially decreased. Vice versa when the tension in the yarn decreases the movements of the shaft and therefore the force which the tensioning elements 8 exerts on the yarn is increased. The initial tension in the spring 50 can be adjusted by the screw 44 and the initial leverage of the cord 52 can be adjusted by moving the screw 44 in a slot 38 in the bracket 30. In a second embodiment magnetic means are used to provide the restoring force and a double disc type of the tensioning means is provided as the inlet tensioner.
Patent GB-1356401-A (GB)
Title: Flame retardant products
IPC: B29C44/34
Filed: 1971-05-21
Abstract: 1356401 Flame-retardant polymer foam compositions MONSANTO CHEMICALS Ltd 19 April 1972 [21 May 1971] 16224/71 Addition to 1157116 Headings C3C and C3P A flame-retardant foamed composition is obtained by a process comprising feeding into a screw extruder a thermoplastic polymer of an ethylenically unsaturated monomer, a volatile blowing agent and an alkenyloxy haloaromatic compound having a content of metallic impurities not exceeding 600 ppm., and extruding the resulting mixture. Preferably a nucleating agent is also introduced into the extruder. The flame-retardant is preferably introduced in solution either in the blowing agent or in a small quantity of another solvent, e.g. methylene chloride. In an example polystyrene blended with silica and pentabromophenyl allyl ether or 2,4,6-tribromophenyl allyl ether and blown with isobutylene or n-pentane is made into foamed boards by extrusion through a slit die; the blowing agent and, in the latter case, the flame-retardant are introduced into the barrel of the extruder.
Patent GB-741502-A (GB)
Title: Improvements in or relating to the arc-melting of high melting point metals or alloys
IPC: H05B7/10
Filed: 1953-06-12
Abstract: 741,502. Supplying current to moving conductors. IMPERIAL CHEMICAL INDUSTRIES, Ltd., and ATTKINS, R. June 4, 1954 [June 12, 1953], No. 16226/53. Class 38 (1). [Also in Group XI] Current is fed to the rectangular, continuously-lowered electrode 37 of an arc furnace by a plurality of individually spring-loaded contact brushes 10 arranged in one or more groups, the spring tension of the groups being adjustable singly or together. The brushes 10 have tapered ends 12 bearing on the electrode and are mounted in groups on plates 3, 4 which have threaded apertures through which pass threaded shafts 7 mounted in a rectangular casing 1 carrying guide shafts 2 for the plates 3, 4. Horizontal pairs of brushes are mounted in apertures in the plates 3, 4. Each brush 10 is yieldably restrained by a flat spring 13 secured to a shoulder 14 on a plate 3 or 4 and abutting on a shoulder 15 on the brush 10. Thus on rotation of the shafts 7 through gearwheels 8, 9 thereon, the plates 3, 4 are moved towards each other or apart to adjust the pressure of the groups of brushes on the electrode. Current is fed to a bus-bar 26 with a yoke 27 carrying at its end copper blocks 28 slotted at 29 to carry braids 34 also attached to slots 33 in flanges 32 on copper blocks 31 attached to the plates 3, 4. Each contact brush 10 has an aperture 36 carrying a braid connecting it to an aperture 35 in the copper block 31.
Patent GB-389072-A (GB)
Title: Camera magazine
IPC: G03B19/04
Filed: 1931-06-04
Abstract: 389,072. Photographic roll-film cameras. FAIRCHILD AERIAL CAMERA CORPORATION, 270, West 38th Street, New York, U.S.A. June 4, 1931, No. 16303. Convention date, June 6, 1930. Void [Published under Sect. 91 of the Acts]. [Class 98 (i).] A roll-film holder for use in aerial cameras comprises a take-up spool which is driven intermittingly through a clutch controlled by a locking-plate associated with a measuring roll, the locking-plate being periodically released by a cam ; a pressure-plate is operated synchronously with the take-up spool. As shown, a spindle 14, adapted to be coupled to the camera drive by a projection 15, drives through bevel gears 18, 19 a shaft 21 furnished with a cam and roller 23 adapted to depress a lever 24 against the action of a spring 29 thereby rocking a shaft 25 carrying arms 27 engaging blade springs 28 on the pressure-plate 7 and pressing the film against a window 6. The shaft 21 is furnished with a gear 20 meshing with a gear 30 integral with a cam 31 and ratchet 32 freely mounted upon a stud 47. A sleeve 46 on the stud 47 carries a gear 45 meshing with the take-up spool drive gear 16, and ratchets 42, 44. The film passes to the take-up spool around a measuring-roll carried by a spindle 17 fitted with a gear 40 engaging a gear 39 integral with a locking-plate 38 normally held by a pin 33<c> on a lever 33 engaging a notch 37. The lever 33 is pivoted on a stud 36 which also supports a lever 34 furnished with a claw 34<b> normally engaging the ratchet 42 and a detent lever 35 engaging the ratchet 44 to prevent reverse movement of the take-up spool. A plate 48 loosely mounted upon the sleeve 46 carries a pawl lever 49 constrained by a spring 51 to bring a tooth 50 into the path of the ratchet 32. In operation, the pawl 50 is normally disengaged by a pin 52 riding on a cam 53 fixed to the sleeve 46. As the gear 30 rotates, the cam 31 engages the lever 33 to free the locking-plate 38 and the further movement of the lever disengages the lever 34 from the ratchet 42 and allows the ratchet 32 to drive the spool take-up through the pawl lever 49. A counter 58 is operated by a cam 56 secured to the gear 20 and engaging an actuating member 57.
Patent GB-440883-A (GB)
Title: Automatic friction multi-disc or lamellae brake for electric motors
IPC: H02K7/102
Filed: 1934-06-02
Abstract: 440,883. Brakes for electric motors. SOUSEDIK, J., Vsetin, Moravia, Czecho Slovakia. June 2, 1934, No. 16474. [Class 103 (i)] [See also Group XXXVII] A braking device for electric motors, particularly motors for raising loads, comprises interleaved friction plates alternately slidably keyed to the motor shaft and slidable on bolts attached to the fixed motor casing, springs for pressing the plates together and a magnet or magnets for releasing the brake, the winding of the magnets being connected to the motor winding so that the brake is released when current is supplied to the motor. As shown in Fig. 1, brake discs 9 are slidable on bolts 10 projecting from a plate 13 secured to the motor casing 11 and intermediate discs 8 are splined to a nave 7 on the motor shaft 1. The brake is applied by a spring 5 acting on the armature 4 and is released by a magnet 3. The magnet and armature both rotate with the shaft 1, the armature being connected with the nave 7 by sliding pins 6 and acting also as a friction disc. The magnet winding is in series with the rotor winding of the motor and the brake is thus automatically applied if the current is cut off. The armature is provided with copper or brass rings 19 and in the case of an alternating current motor, the magnet, due to hysteresis and choking action, prevents the current in the motor from rising too rapidly at starting. Fig. 5 shows a brake suitable for an arrangement in which the release magnets are in series with the stator winding of, for example, a three-phase motor. Three magnets 140 of U-form are arranged symmetrically on a fixed plate 160, the armatures 130 being secured to the brake disc 50 against which bear the springs 60. The magnet windings are in series each with one phase winding of the motor stator and the arrangement may be such that interruption of one phase is sufficient to apply the brake. The magnets may have two windings fed respectively by the stator and rotor currents. The invention may be applied also to continuous current motors.
Patent GB-922822-A (GB)
Title: Improvements in or relating to continuous sinter and roasting apparatus
IPC: F27B21/06
Filed: 1961-05-05
Abstract: In a modification of the apparatus described in the parent Specification, the need for lubrication of the sliding seal mechanism between pallets and windbox is eliminated by making one of the members from a temperature-resistant synthetic plastic material, such as a polymerisation product of highly or fully fluorinated hydrocarbons.  If bushes of similar material are fitted between the pressure rollers and their axles, lubrication of these points is also rendered unnecessary.
Patent GB-655095-A (GB)
Title: Rolling cover for pit furnace
IPC: C21D9/70
Filed: 1948-06-19
Abstract: 655,095. Door operating-appliances. SCHAEFER, H. June 19, 1948, No. 16531. Convention date, July 10, 1947. [Class 65(i)] [Also in Group XII] Initial movement of the driving means for a traversable furnace cover 2 mounted on wheels 3 serves to raise or lower wings 8 adapted to effect the end seals between the cover and the furnace, the side seals being effected by wings fixedly mounted on the cover. The movable wings are suspended from bellcrank levers 9 which are pivoted at 10 at the ends of the cover and are connected by cables 15, 16, 17, 18 to the opposite ends of operating levers 13 pivoted at 14 on the sides of the cover. As shown, the levers 13 are connected to endless driving chains 19 carried by pulleys 20 and 22. Movement of the chains in either direction turns the levers 13 into contact with one or the other of buffers 23, 24 to raise the wings and thereafter to traverse the cover. In a modification the levers 13 are connected through a lost motion device to rack and pinion driving means. Specifications 518,012 and 537,226, [both in Group XII], are referred to.
Patent GB-612741-A (GB)
Title: Improvements in and relating to ultra high-frequency circuits
IPC: H01P7/02
Filed: 1946-05-31
Abstract: 612,741. Electric resonators. PHILIPS LAMPS, Ltd. May 31, 1946, No. 16535. Convention date, June 1, 1945. [Class 40 (viii)] An impedance transformer comprises three parallel or substantially parallel conductors a, b and c, all of which are intercoupled, the ends A and C of two of the conductors serving as input terminals and the end B of the third conductor together, with an end C serving, as output terminals, and two, preferably adjustable, short-circuiting bridges K1 and K2 being provided, one interconnecting conductors a and b and the other all three conductors. The conductor c may be tubular and may enclose the other conductors.
Patent GB-1439715-A (GB)
Title: Looms
IPC: D03D39/22
Filed: 1974-04-16
Abstract: 1439715 Terry looms SAURER-DEIDERICHS SA 16 April 1974 [19 April 1973] 16541/ 74 Heading DIE A mechanism in a loom for driving the sley for the production of travelling fabric in which the sley has an unvarying rear position comprises a transmission unit 2 located between a drive unit 1 and sley 4 having a driving member 1a control member 11 and driven member 12 connected by opposed grooves 10a, 11a, 11b, 12a and balls 17, 18 therein the grooves 10a, 11a being parallel to the axis of the members and the grooves 11b, 12a being helical and means being provided to cause rotation of control member 12 to select full or partial beat up. The driven shaft 5 has rollers 6, 6' which are located in slots 7, 7' having a straight and angled section. The straight section prevents axial movement of rollers 6, 6' whilst the angled section allows axial motion. The straight section allows a full stroke. In the angled position however the member 11 undergoes axial displacement by means of the shaft 5 and member 12 turns realtive to member 11 and the sley carries out an incomplete stroke. The control member is shown in Fig. 4 and comprises a control shaft 20 with quadrant gear 21 which meshes with a gear 22 mounted on the member 8 in which the slots 7 are located. In other embodiments different transmission units are described having slightly different arrangements of grooves and the gear control may be replaced by a rod control.
Patent GB-568682-A (GB)
Title: Improvements in and relating to moving coil electro-acoustic apparatus
IPC: H04R9/06
Filed: 1943-10-11
Abstract: 568,682. Moving-coil telephone instruments. MULLARD RADIO VALVE CO., Ltd., and KEDDIE, J. E. Oct. 11, 1943, No. 16616. Drawings to Specification. [Class 40 (iv)] In a moving coil instrument, a non-magnetic coil former has one or more layers of magnetic dust incorporated between the inner layer of the coil and the former as well as or instead of between the layers of the coil. The dust may be incorporated in the binding lacquer for the coil and may be made co-extensive with the coil or of restricted extent. The iron only constitutes a small part of the weight of the moving system, e.g. less than 15 per cent. The iron particle size is preferably 25 microns or less, e.g. carbonyl iron having a particle size of 3 to 5 microns.is suitable.
Patent GB-349782-A (GB)
Title: Improved means for mounting the rake heads of side-delivery rakes, hay-rakes, swath-turners, tedders, potato-diggers and like machines
IPC: A01D78/00
Filed: 1930-05-30
Abstract: 349,782. Lubricating rakes. MARTIN'S CULTIVATOR CO., Ltd., MARTIN, W. E., and MILLS, F. W. J., Ryhall Road, Stamford, Lincolnshire. May 30, 1930, No. 16740. [Class 12 (ii).] To lubricate machines of the type in which rakes are rotated with their teeth always in a pendant position, the heads of the rakes being rotatably mounted with respect to the ends of the flyer-arms or the discs carrying them, each rake head 1 is provided with a socket 2 in which is detachably fitted a hollow pin 3 on which the flyer arm or disc is mounted by a tubular lug 4, the hollow pin being filled with lubricant which passes through apertures 9 on the pin to lubricate the bearing surfaces. The outer end of the pin is closed by a plug 11 bored to receive a screw 12 that passes through and holds in position a cap 13 serving as a flange to maintain the lug 4 on the pin 3. The inner end of the pin is fitted with a plug 5 that is transversely bored to take a member 7 securing the pin to the socket 2. The pin is filled with lubricant through apertures 18, 19 after the cap 13 and screw 12 have been withdrawn. The plugs may be screwed into the ends of the pin, secured by transverse pins, or may be held in position by a bolt passing through the pin. The outer plug may be fitted with the flange for retaining the lug 4 in position. The bolt may carry split pins or other projections to throw the oil up to the apertures 9. These apertures may be radial, oblique but not radial, or formed by slots. They may be conical.
Patent GB-755780-A (GB)
Title: Improvements in apparatus for cleaning paper for printing
IPC: D21G9/00
Filed: 1954-06-08
Abstract: 755,780. Printing-machines. OXY-DRY SPRAYER CORPORATION. June 8, 1954 [Sept. 11, 1953], No. 16771/54. Class 100 (2). [Also in Group VIII] Set-off, preventing.-Dust, or anti-offset starch powder &c. is blown from the surface of paper travelling towards a printing roller, by jets 33 of air from a pipe 31 in a casing 21, and removed by a suction pipe 32 slotted at 40. There may be a venturi effect at 32b. The slots in the pipe 32 may be narrower at the end to which the suction hose is secured. The sides of the casing 21 may be lined with felt or rubber &c. 26 which may extend beyond the walls of the casing, to within 1/16 to 1/4 inch of the paper.
Patent GB-1330916-A (GB)
Title: Electrode for small hole electro-chemical drilling
IPC: B23H3/04
Filed: 1971-05-25
Abstract: 1330916 Electro-chemical drilling tool UNITED AIRCRAFT CORP 25 May 1971 [13 July 1970] 16817/71 Heading C7B A hollow electrode for electro-chemical drilling comprises a metallic tube 2 and a dielectric coating 3 with a tapered end 8 overlaid by conductive material 14. The metallic tube may be beryllium copper and the dielectric material may be a thermoplastic material such as poly(mono chloro-p-xylylene). The tip 7 of the metallic tube may be rounded. The conductive material may be silver and be co-extensive with the dielectric coating. The metallic tube may be 0À01" diameter and the dielectric and conductive coatings 0À001" thick.
Patent GB-200115-A (GB)
Title: Improvements in and relating to the spindles of cotton and the like spinning machines
IPC: D01H7/70
Filed: 1922-04-20
Abstract: 200,115. British Thomson - Houston Co., Ltd., and Clough, F. H. April 20, 1922. Spindle apparatus; antiballooning arrangements. - Relates to spinning-machines of the kind described in Specification 179,282, wherein the yarn passes inside a tubular member or funnel and through an eye thereon, the spindle being made in two portions, which are telescopically connected together to permit relative rotary and longitudinal movement, and respectively carry the funnel and the bobbin. The spindle a, which carries the funnel b, is integral throughout its length and is mounted at each end in bearings capable of lateral movement against friction. The bearings are preferably of the form described in Specification 200,452, [Class 12 (i), Bearings &c.], but may consist of a graphite bush 10, Fig. 2, which may move laterally under the constraint of a spring p which presses the flange against the support g. The bobbin is carried by means described in Specification 198,309, comprising a sleeve r, splined to the spindle and provided with a flange s embraced by the flange u of the bobbin-carrier and an annular ring t. The ring t may be braked by means controlled by the tension of the yarn, such as a mechanical brake, as described in Specification 179,282, or electric means consisting of an eddy-current brake, or a brake operated by an electro-magnet, the circuit of which is controlled by the tension of the yarn. The sleeve r is carried by trunnions engaged by the lifter rail 8 and is mounted in bearings preferably of the form described in Specification 200,452, [Class 12 (i), Bearings &c.], to damp any oscillations.