baber/WOPTO huggingface dataset:
Patent GB-324161-A (GB)
Title: Improvements in damper windings for synchronous converters
IPC: H02K3/20
Filed: 1928-11-20
Abstract: 324,161. Dreyfus, L. A., and Allmõnna Svenska Elektriska, Aktiebolaget. Nov. 20, 1928. Field magnets, dampers on poles of; commutating windings, - The end connections of the damper bars located in the main poles of a synchronous converter are formed with or connected to one or more turns surrounding the commutating zone or a portion thereof. Fig. 2 shows a form in which one of the end connections 4 connecting bars 3 located in main poles 1 is formed with a loop 6 surrounding the commutating pole 2. In the event of a short-circuit or other overload sufficient to open the circuit breaker, since the turn 6 carries the resultant of all the currents in the bars 3, the resulting magneto-motive force is opposed to that of the armature and assists that of the commutating pole. In the form shown in Fig. 3, each main pole has a separate damper element formed with a portion 7 embracing the commutating pole. To avoid over-commutation the end connections may be joined by intermediate bars 8, Fig. 4 or short-circuited members 9, Fig. 6 may be located in the spaces between the main and the commutating poles. The auxiliary turns 6 or 7 need not embrace the whole of the axial length of the commutating zone. The end connections may be connected to suitable points on an existing commutating pole winding, but in this case, the damper winding must be interrupted at the middle of each main pole. Fig. 8 shows the connections when the damper bars on two main pole halves are in series. In the interval after the release of the circuit breaker, hunting arises and this may result in a flash-over at the commutator. Accordingly, the damper current should be kept as low as possible and this may be effected by having a high resistance damper winding. On the other hand, to avoid the tendency of the currents to circulate only under the main poles, the resistance of the turns surrounding the commutating zone should be made as low as possible as shown by the heavy lines in Figs. 2, 3, 4, 6 while the remaining parts of the damper are of high resistance. In some cases, the method described may not be sufficiently effective for preventing a flash-over, and the portion 12, Fig. 8 of the damper winding surrounding the commutating pole may be connected to a switch mechanically coupled to the main circuit breaker so that the portion 12 is short-circuited when the circuit breaker opens. Pole cores are not necessarily provided in the commutating zones.
Patent GB-1418557-A (GB)
Title: Current cathodic protection system
IPC: C23F13/04
Filed: 1973-07-18
Abstract: 1418557 Cathodic protection EXXON PRODUCTION RESEARCH CO 18 July 1973 [5 Oct 1972] 34176/73 Heading C7E An impressed current cathodic protection system for a marine structure comprises a supporting member 20 that can be lowered in the water into position adjacent said structure and later retrieved, an underwater power supply 30 on or in said supporting member for converting an applied alternating current to low voltage D.C., at least one anode 65, 66, on said supporting member, means for transmitting D.C. from 30 to said anode, and means for transmitting A.C. from a remote source to supply 30. The marine structure may be an oil-drilling rig, in which case 20 is a drill-pipe string, either of metal, when the anodes have dielectric pads between them and 20, or of dielectric material when the anodes are applied directly to 20, e.g. in countersunk grooves to minimize damage. An automatic potential controller may co-operate with supply 30 as in Fig.3 (not shown) so that the potential difference between the anodes and marine structure may be monitored continuously; the D.C. supply to the anodes may be pulsed. Alternative forms of carrier 20 are (1) a cable passing round a sheave on the sea-bed Fig.7 (not shown) and (2) a rod having transversely extending arms to which anodes are attached Fig.6, (not shown). The automatic potential controller may also be within pipe 20; the pipe may be liquid-filled for better cooling of the power supply, and the anodes may be of Pt on Ta, Pt on Nb, Pt on Ti, or Pt-studded Pb. An installation entirely under water, e.g. an oil-gas separator, may also be cathodically protected Fig.8, (not shown).
Patent GB-749886-A (GB)
Title: Improvements in and relating to copolymeric products
Inventor: REEDER FRANK
IPC: C08F8/00
Filed: 1953-12-09
Abstract: Copolymers of acrylonitrile and esters of ethylenically unsaturated acids, such as acrylic and methacrylic esters, are reacted with quaternary ammonium compounds of the type (X-R-S+) Y- in which X is a primary amino group, R is a divalent hydrocarbon group, S is either NR1R11R111 in which R1, R11 and R111 are alkyl groups, or a heterocyclic ring containing a nitrogen atom, and Y is a cation, for example the hydrochloride of (beta-amino-ethyl) triethylammonium chloride, the reaction being effected under such conditions that quaternary ammonium groups -R-S+ -Y- are combined in the polymer molecule. The reaction may be effected by heating the copolymer, preferably in the form of threads or films, in an aqueous bath of the quaternary ammonium compound, or by immersing the copolymer in a bath of the compound and then drying and heating the impregnated product. The treatment improves the dyeing properties of the copolymers. Specifications 666,716, 670,268, 670,269, 701,475 and 714,530 are referred to.
Patent GB-1321438-A (GB)
Title: Copolyamide filaments and fibres
IPC: D01F6/60
Filed: 1970-07-15
Abstract: 1321438 Copolyamide fibres BAYER AG 15 July 1970 [31 July 1969] 34247/70 Heading B5B Low titre filaments i.e. filaments having a titre of 1 to 50 dtex, are composed of copolyamides having a relative solution viscosity (as measured in a solution of 1g polyamide in 100 ml. m-cresol at 25‹ C.) of from 2À3 to 3À4. The copolyamides contain, in addition to the main component, from 10 to 50% by weight of co-components which are non-isomorphous with the main component and which are randomly distributed along the polymer chain. The filaments have an orientation, determined by a specified method as the reciprocal azimuthal width at half of maximum intensity of the equatorial X-ray (200)-reflex of 0À11 Œ 0À01. The filaments are prepared by melt-spinning the copolyamide and, immediately after spinning and cooling, the filaments are stretched at a stretching ratio of 1À5 to 3À0 in a roller stretching apparatus at a roller temperature of 20 to 30‹ C.; the filaments are then stored for at least 30 minutes before any further processing. After storage the filaments may be formed into threads by further stretching at 20‹ to 180‹ C. to a final stretching ratio of 1 : 3À0 to 1 : 5À2 and the relaxation taken up. The filaments may then be crimped and cut into staple fibres. Specified copolyamides are a cocondensate of 60% caprolactam and 40% lauric lactam, a cocondensate of 70% caprolactam and 30% #-aminoundecanoic acid and a copolyamide of 85% caprolactam and 15% of the salt of a mixture of 2,2,4- and 2,4,4-trimethylhexamethylene diamine and adipic acid.
Patent GB-812351-A (GB)
Title: Apparatus for causing intermittent operation of a hydraulic motor
Inventor: LEVETUS FRANCIS BENJAMIN
IPC: F15B11/00
Filed: 1954-11-26
Abstract: 812,351. Hydraulic apparatus. KEELAVITE CO. Ltd. Nov. 14, 1955 [Nov. 26, 1954], No. 34319/54. Class 69 (2). An hydraulic motor 1 is operated intermittently, and by predetermined amounts. The motor is controlled by a valve 9 selectively connecting one side of the motor to the output line of a pump 3 or to a relief line 7. The other side of the motor is connected to a discharge line 15. In the left-hand position of a valve 31, a supply line 26 is connected to each end of a cylinder 27 to move a piston 28 to the right to a position limited by an adjustable stop 30. When the valve 31 is moved to the right by a cam 37 the supply line 26 is connected to the right-hand end only of the cylinder 27 to move the piston 28 to the left, the exhaust liquid acting through lines 24, 12 to raise the valve 9 so that the motor is driven by the pump 3. Motor 1 drives a metering pump 13 in the exhaust line from cylinder 27 so that when piston 28 reaches its left-hand end position the pressure in lines 24, 12 drops and valve 9 is returned by a spring 11 so that the motor is stopped. The pump 13 may be of a variable-capacity type so that the amount that the motor is actuated may be varied by adjustment of the capacity of the pump as well as by adjustment of the stop 30.
Patent GB-453396-A (GB)
Title: Improvements in or relating to amusement apparatus
IPC: A63G25/00
Filed: 1935-12-11
Abstract: 453,396. Amusement apparatus. BARTLETT, J. N., 330, Main Street, Tonawanda, New York, U.S.A. Dec. 11, 1935, No. 34320. Convention date, Dec. 15, 1934. [Class 132 (i)] A series of motor driven vehicles are connected together by extensible resilient means which maintain the spacing between them whether they are travelling around the flat bottom portion or riding up on the curved sides of a banked track. In one embodiment, the bowl shaped track 10, Fig. 1, comprises a horizontal portion 12, and a banked portion 13 merging into a substantially vertical portion 15 terminating in a guard rail 17. Steps 20 lead to a spectators' platform 19 surrounding the track and doors 16 flush with the track serve for the ingress &c. of passengers. The cars 11 are connected by cables 43 fixed to the cars at 44, and passing over guide pulleys 47, 50, and floating pulleys 45, 48 biassed by springs 46, 49 which keep the cables 43 taut while allowing the cars to ride up the banked portion of the track as shown in Fig. 1. Some or all of the cars are provided with a driving motor, for example, a petrol engine 21, Fig. 2, driving the rear wheel 23 through gearing 26, shaft 25, chain 24, and a known automatic clutch 22 which is engaged to drive only when the throttle is opened. The throttles of the driving motors in all the cars are controlled electrically by an operator in one car through a switch 31, Each car has a steering column 36, a cable 35 Fig. 4, tensioned by springs 39 and passing over guide pulleys 38 transmitting the motion of a pulley 37 on column 36 to pulleys 34 rigid with swivels 33 carrying the steering castors 32. The manual steering is limited by stops 40 on cable 35 coacting with fixed stops 41, and springs 42, Fig. 5, bias the castors 32 to a position in which the cars move straight ahead. In another embodiment, the track is oval, and is banked along the longer sides of the track on the inside thereof, and along the ends of the track on the outside.
Patent GB-1428274-A (GB)
Title: Milling cutters
IPC: B23C5/22
Filed: 1973-07-19
Abstract: 1428274 Milling cutters KYSOR INDUSTRIAL CORP 19 July 1973 [19 July 1972] 34371/73 Heading B3K A milling cutter comprises a body 10 having a frusto-conical section 12, cutter blades 50 secured in pockets 21, each of the latter having faces 22, 23 and 24, which provide an effective negative true rake and a positive angle of inclination for the cutting edge of the blade. A finishing cutter blade 40 is provided. Each blade 50 is indexable and reversible so as to provide eight cutting edges, and has formed thereon at each cutting edge, chamfers 54, 55. (For Figures 1, 5 and 6 see next column.)
Patent GB-183795-A (GB)
Title: An improved pressure indicator provided with a visual signal
IPC: G01L7/08
Filed: 1921-12-21
Abstract: 183,795. Soc. Anon. des Appareils J. E. Malivert. July 28, 1921, [Convention date]. Elastic-diaphragm pressure gauges; mounting- details for.-Comprises a construction of gauge of the diaphragm type which is fitted with a signal disc indicating a maximum pressure to which the instrument is previously adjusted, a spring-pressed valve cutting off pressure-fluid from the gauge when the maximum pressure is reached. A diaphragm 5 is clamped between the main body 1 and the part 3 by means of a nut 4. The body 1 is recessed to receive a plunger 9 the lower and convex side of which is pressed against the diaphragm by a spring 11 located between the upper side of the plunger and a screwed collar 12 by which the spring may be adjusted to a particular maximum pressure. The top of the body 1 is recessed to receive the indicating dish and mechanism which is arranged as a unit. This comprises a disc 15 turning about an axis 16 below a disc 17 provided with sector-shaped openings, which disc 17 together with a lower strap 18 is secured to the body 1 by screws surrounded by springs 31. A bell-crank lever 24 pivoted at 23 to a leg 22 depending from the strap 18 rests at 25 on a boss 26 formed on the plunger. At the other end the part 24 carries a pin 27 which engages a pin 28 on the disc 15, the pin 28 being held against the pin 27 by a spring 29. At the maximum pressure, which is indicated by coloured portions of the disc 15 appearing under openings in the disc 17, the plunger engages the shoulder 13 and can move no further. At the same time a valve 33 which is spring-pressed to follow the movement of the plunger cuts off the pressure-fluid from the device.
Patent GB-382120-A (GB)
Title: Improvements in or relating to a machine for stripping the rubber portion from the cord lining of vehicle tyres
IPC: B29B17/02
Filed: 1931-12-11
Abstract: 382,120. Stripping rubber from tyre covers. FROGNER, A., Gj÷vik, Norway. Dec. 11, 1931, No. 34427. [Classes 31 (i) and 140.] In a machine for stripping the rubber covering from tyres, the tyre is fed between rotary and preferably spring-loaded rollers against a knife which reciprocates transversely of the feed, and pressure members comprising a number of spring-influenced rollers yieldable independently of one another and vertically with respect to the tyre act against the outer part of the tyre. The tyre-cover is fed between a toothed or grooved roller 3, Fig. 1, and an upper shaped roller 10 which is carried by a shaft 7 mounted in spring-pressed bearings 8. The outer parts of the tyre are pressed against the roller 3 by means of rollers 12 mounted in yokes at the lower end of rods 15 which are independently pressed downwardly by springs 18. The rollers 12, Fig. 4, are mounted on sleeves 13 through which the shaft 7 passes, the inner diameter of the sleeves being such as to permit sufficient vertical movement of the rollers 12. In front of the feed mechanism is a knife 23, Fig. 2, mounted in a holder 21 which is caused to reciprocate by means of a lever 28 which is oscillated by a cam-groove in a cylinder 31 on the main shaft 32 from which the whole apparatus is driven. The knife separates the rubber of the tyre from the cord ; the rubber is lifted by a series of tongues 40 above the knife, the cord which tends to wrap around the roller 3 is stripped therefrom by tongues 38 below the roller.
Patent GB-389583-A (GB)
Title: Improvements in refractors for directing light
IPC: F21V5/00
Filed: 1931-12-14
Abstract: 389,583. Prismatic refractors. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, BEGGS, S. S. and WILSON, G. H., c/o General Electric Co., Wembley, Middlesex. Dec. 14, 1931, No. 34600. [Class 75 (ii).] A refractor having prismatic elements for directing light in preferred directions has a smooth outer surface 1 and an inner surface formed with cross-refracting prisms 2, which provide relatively large deviation, on one part, and prisms 3, producing relatively small deviation, on another part. In the crossrefracting prisms, light falls on two surfaces, the rays incident on one surface crossing within the prisms those incident on the other. A clear portion 4 is provided. A spherical reflector may be placed below the refractor.
Patent GB-192885-A (GB)
Title: Improvements in or relating to electric heaters for water and other liquids
IPC: H05B1/02
Filed: 1921-12-23
Abstract: 192,885. LoubiÞre, G. E. Dec. 23, 1921. Heating by electricity. -An electric heater 1 for water or other liquids is provided with a relay coil 30 arranged in shunt to the heater circuit, and energized by a switch 20 controlled by the handle 8 of the water supply cock, the armature 32 of the relay and tho corresponding contact bar 35 having contacts 34, 36, preferably of carbon, connected in series with the heater 1 and the mains 18, 43. The armature 32 is pivoted at 33 and connected to the block 29 supporting the relay coil by a conducting spring 40. A resistance 38 is fitted in series with the relay coil 30. When the cock handle 8 is turned to supply water to the heater the relay circuit is closed with a consequent closing of the circuit through the contacts 36, 34 and the heater 1. The safety device shown in Fig. 3, which prevents the heater circuit being closed unless water is passing through the apparatus, may be fitted to the heater inlet. When water enters the connection 47, the cup 49 is lifted and tilts the arm 54 to close the switch 60 which is fitted in the heater circuit. The cup 49 has perforations 52 and a rim 50 which abuts against stops 51 fitted to the connection 47 to limit the lift of the cup.
Patent GB-839838-A (GB)
Title: Improvements in or relating to the preparation of cobalt compounds
Inventor: LIBERMAN ALEXANDER
IPC: C22B3/32
Filed: 1955-12-05
Abstract: Cobalt compounds in pure form are prepared from solutions of cobalt sulphate, chloride, or nitrate contaminated with nickel and/or iron and/or copper, each of which may be present in an amount up to 1% by weight of the cobalt, by maintaining the solution at 15 DEG  to 65 DEG  C., adding a sequestering agent selected from the class of polyaminocarboxylic acids and their alkali-metal salts, and thereafter precipitating or crystallizing out the cobalt compound. The amount of sequestering agent employed is approximately 40 times the combined weight of the nickel, iron, and copper, but may be varied depending on how pure the final cobalt compound is to be.  The preferred sequestering agent is ethylenediamine-tetra acetic acid and its alkali-metal salts.  The cobalt may be precipitated as the carbonate by adding sodium carbonate or as the hydroxide by adding calcium or sodium hydroxide.
Patent GB-1067050-A (GB)
Title: Fork lift type materials handling apparatus
IPC: B66F9/08
Filed: 1964-08-25
Abstract: 1,067,050. Vehicle bumpers. J. A. EASTON. Aug. 25, 1964 [Sept. 5, 1963; Aug. 18, 1964], No. 34739/64. Heading B7J. [Also in Division B8] The lifting carriage of a fork lift mechanism mounted on the front of a tractor and semitrailer includes a transversely-extending plate 53 which functions as a vehicle bumper when the fork lift mechanism is inoperative.
Patent GB-1520554-A (GB)
Title: Motor vehicle having a box-shaped body or superstructure which overtops the height of the roof of the driver's cab
IPC: B62D35/00
Filed: 1976-08-20
Abstract: 1520554 Vehicle air deflectors H SPIER & SOHN 20 Aug 1976 34760/76 Heading B7J In a motor vehicle a deflector of airfoil shape is hinged at its leading edge to the cab 4 and its inclination is adjustable by variable length struts 6 attached between the deflector and the cab, so that head wind will be deflected over the top of body 5. In a preferred construction the deflector is a synthetic plastic moulding having reinforcing ribs 1<SP>3</SP>, Fig. 2, on its underside with transverse metal tubes 2, 3 embedded in the deflector to facilitate fitting to the cab and to the struts 6. The deflector may be made of sheet metal in which case a hollow construction is preferable.
Patent GB-631312-A (GB)
Title: Improvements in or relating to magnetic materials, and articles made therefrom
IPC: H01F1/20
Filed: 1945-12-21
Abstract: 631,312. Magnetic dust structures. STANDARD TELEPHONES & CABLES, Ltd., and POCOCK, L. C. Dec. 21, 1945, No. 34761. [Class 38 (ii)] A thin magnetic sheet or strip is formed from powdered magnetic material such as cobalt-iron bound by a non-metallic binder. In one form, the powdered magnetic material is mixed with a powdered binder material such as a phenolic thermosetting or organic thermoplastic powder and moulded into a thin sheet by heat and pressure. In another form, powdered magnetic material is formed into a thin sheet 2 by pressure or by pressure and heat and is placed between sheets 3 and 4 of thermoplastic or thermosetting material, the whole then being subjected to heat and pressure. Alternatively the magnetic sheet could be rolled from a mixture of magnetic powder and binder powder.
Patent GB-961196-A (GB)
Title: Method of and means for rapidly stowing cavities
IPC: E21D11/15
Filed: 1960-10-11
Abstract: 961,196. Mines. BERGBAUSTAHL G.m.b.H. & CO. Oct. 11, 1960 [Nov. 16, 1959], No. 34790/60. Heading E1F. An underground cavity 4 in a mine is filled by expanding hollow, tubular, bodies 5 in the cavity. The bodies may be filled by hydraulic or pneumatic pressure and the surfaces of the bodies not in contact with the cavity walls may be supported by timber 7.
Patent GB-365250-A (GB)
Title: Manufacture of oxalkylcellulose esters of organic acids
IPC: C08B13/00
Filed: 1930-11-19
Abstract: Oxyalkylcellulose esters of organic acids are obtained by treating oxyalkylcellulose with the acid anhydride in the absence of a catalyst and a diluent, and preferably at a raised temperature. Acetates directly soluble in acetone and other esters soluble in aromatic or chlorinated aliphatic hydrocarbons are obtained, suitable for the manufacture of films.  In examples, (1) hydroxyethyl cellulose, made by treating alkali cellulose with 4-5 times its weight of ethylene oxide in the presence of benzene, is introduced into 10 times its weight of acetic anhydride and heated for 2\ba1/2\be hours to 120 DEG  C.; the product is soluble in acetone: (2) hydroxypropyl cellulose, made by boiling alkali cellulose with propylene oxide under reflux for 6 hours, is treated with butyric anhydride at 120 DEG  C.; the product is soluble in acetone: (3) hydroxybutyl cellulose, made by boiling alkali cellulose with butylene oxide under reflux for 6 hours, is treated with the anhydrides of coco nut oil fatty acids at 130-140 DEG  C.; the product is soluble in aromatic and chlorinated aliphatic hydrocarbons, in ether, and in ethyl acetate: (4) dihydroxypropyl cellulose, prepared by the action of glycide on alkali cellulose in the presence of chloroform, is acetylated as in (1), giving an acetone-soluble ester: (5) hydroxyethyl cellulose, prepared by the action of ethylene oxide upon cotton in the presence of dimethylaniline as described in German Specification 365,192, is treated with naphthenic anhydride at 130-140 DEG  C.; the product is extracted with methanol and is soluble in aromatic and chlorinated aliphatic hydrocarbons: (6) hydroxypropyl-hydroxybutyl cellulose, prepared by treating alkali cellulose with equal parts of propylene and butylene oxides in benzene, is treated with benzoic anhydride at 130 DEG  C.; the product is soluble in chlorinated hydrocarbons.