baber/WOPTO huggingface dataset:
Patent GB-837647-A (GB)
Title: Treatment of fibres and fabrics of regenerated cellulose
Inventor: BARKER SYDNEY WARREN
IPC: D01F11/02
Filed: 1957-10-28
Abstract: Viscose rayon fibres or fabrics are treated with a sequestering agent first in an acid medium and then in an alkaline medium, to remove coloured impurities, including sulphur and sulphur compounds. Specified sequestering agents are ethylenediamine tetracetic acid and salts thereof and phosphoric acid.  For the first treatment the solution may be maintained at a pH of less than 6.5 and at a temperature of 40-100 DEG  C. and may contain desizing agents, wetting agents and/or detergents, e.g. gelatase and the condensation product of a fatty alcohol and ethylene oxide.  For the second treatment the solution may be maintained at a pH of at least 8 and at a temperature of 60-100 DEG  C. and may contain a detergent, e.g. soap or an anionic or non-ionic synthetic detergent, ammonia or other alkali and a desulphurizing agent, e.g. sodium sulphite or sodium sulphide.ALSO:Viscose rayon fibres or fabrics are treated with a sequestering agent first in an acid medium and then in an alkaline medium, to remove coloured impurities including sulphur and sulphur compounds.  Specified sequestering agents are ethylene diamine tetracetic acid and salts thereof and phosphoric acid.  For the first treatment the solution may be maintained at a pH of less than 6.5 and at a temperature of 40-100 DEG  C., and may contain desizing agents, wetting agents and/or detergents, e.g. gelatase and the condensation product of a fatty alcohol and ethylene oxide.  For the second treatment the solution may be maintained at a pH of at least 8 and at a temperature of 60-100 DEG  C. and may contain a detergent, e.g. soap, or an anionic or non-ionic synthetic detergent, ammonia or other alkali and a desulphurizing agent, e.g. sodium sulphite or sodium sulphide.
Patent GB-872101-A (GB)
Title: Improvements in or relating to injection moulding machines
Inventor: HAUPT EDWIN
IPC: B29C45/28
Filed: 1957-10-28
Abstract: 872,101. Injection moulding machines. INSTITUT FUR WERKZEUGMASCHINEN. Oct. 28, 1957, No. 33564/57. Class 87(2). A nozzle 3 for an injection moulding machine is in constant operative connection with a mould 5 and is provided with an eccentric bore 2 which, in one position of the nozzle, communicates with a bore 6 in the mould, and in another position thereof, is moved out of communication with the bore 6. The nozzle 3 is rotatable by means of a pinion 8. The nozzle may be wholly or partly of ceramic or other heatinsulating material. 9 is a nozzle heater.
Patent GB-1240148-A (GB)
Title: Apparatus for correcting the position of a railway track
IPC: E01B27/13
Filed: 1968-07-15
Abstract: 1,240,148. Correcting track position. F. PLASSER. 15 July, 1968 [13 July, 1967], No. 33627/68. Heading B7N. In an arrangement for levelling or laterally correcting the position of a railway track, the track is lifted or laterally shifted to a position defined by a reference line or chord in two operations comprising a first rough correction followed by a second precise correction. The machine 1 is provided with chords 11, 12 mounted on trolleys 13, 14, 16 and measuring device M which co-operate with lateral shifting device 6 for laterally correcting the position of the track and transmitter 18, receiver 20 and shadow board 19 which co-operate with lifting device 8 to level the track. The shadow board 19 is formed with a main member 22 and a vertically sliding member 23. The rough correction proceeds until member 23 obscures the radiation beam from transmitter 18 to receiver 20. The resulting signal pulse lowers member 23 and operates the lifting apparatus at a slower rate until the beam is again obscured by main member 22. A similar system Fig. 7 (not shown) is used for lateral correction.
Patent GB-649116-A (GB)
Title: Process for the production of ethyl 4-hydroxy-coumarin-3-carboxylate
IPC: C07D311/46
Filed: 1947-12-19
Abstract: Ethyl-4-hydroxy-coumarin-3-carboxylate is obtained by reacting an acyl-salicyl-halide, e.g. acetyl-salicyl-chloride with an ethyl alkoxy-magnesium malonate preferably ethyl ethoxy-magnesium malonate. The product is isolated in conventional fashion after decomposition of the magnesium complex.  Homogeneous solutions may be obtained by the use of non-polar solvents such as ether. In examples, ethyl ethoxy-magnesium malonate is produced from ethyl malonate, absolute alcohol and magnesium turnings and dissolved in (1) ether and (2) a mixture of carbon tetrachloride and benzene, acetyl-salicyl-chloride is then added in (1) ether and (2) benzene to the above solutions at 5 DEG  to 10 DEG  C. and after heating on a water bath for a few minutes is cooled, the complex decomposed with 2-5 N sulphuric acid, the product separated from ether by extraction with dilute sodium hydroxide solution and isolated after acidifying the ice-cold solution with 5 - hydrochloric acid and purified by recrystallization from alcohol or via the sodium salts.  Specification 568,112 is referred to.
Patent GB-978404-A (GB)
Title: Improvements relating to motor-vehicle suspensions
IPC: B60G17/00
Filed: 1963-08-26
Abstract: 978,404. Motor vehicle suspensions. DATMLER-BENZ A.G. Aug. 26, 1963 [Sept. 5, 1962], No. 33708/63. Heading B7D. In a motor vehicle wherein on increase of vehicle load the variation of axle load on the one axle is greater than on the other axle, the springing of the one axle has a linear rate and of the other axle has a progressive rate. For example, a van with a front engine and drive would have a progressive rate front suspension and a linear rate rear suspension. The progressive rate suspension is preferably softer than the linear rate suspension.
Patent GB-847493-A (GB)
Title: Method of making plastic covered golf balls
Inventor: SMITH ROBERT FULTON
IPC: B29C63/22
Filed: 1956-11-05
Abstract: 847,493. Moulding polyethylene golf balls. WORTHINGTON BALL CO. Nov. 5, 1956, No. 33736/56. Class 87(2). [Also in Group XV] A method of moulding golf balls having a cover of polyethylene comprises injection moulding the material to form blanks 1, assembling two blanks 1 around a core 7 and compression moulding the assembly, at a temperature and pressure insufficient to distort the core, to form a golf ball. Polyethylene is heated until liquid at a temperature of from 475‹F. to 550‹F. and injected under a pressure of 10,000 p.s.i. into a multi-cavity mould whose temperature is from 60‹F. to 100‹F. to set into blanks 1. The blanks 1 are then assembled around a wound rubber core 7, the assemblies placed in a multi-cavity compression mould 8, 9 preheated to a temperature of from 305‹F. to 310‹F., and are moulded for from two and threequarters to three and one-half minutes at a pressure of 300 p.s.i., whilst maintaining the mould temperature. The pressure is then increased to 1,800 p.s.i. and cooling fluid at a temperature of 38‹F. is passed through the mould to lower its temperature to set the polyethylene at a temperature of 150‹F. The polyethylene cups are said to bond to the rubber core. Polyethylene, gutta-percha, synthetic butyl rubber, high styrene butadiene resin compositions may be used.
Patent GB-1068194-A (GB)
Title: Improvements in or relating to transducers
IPC: H04R23/00
Filed: 1964-08-19
Abstract: 1,068,194. Semi-conductor devices; piezoelectric crystals. SIEMENS A.G. Aug. 19, 1964 [Aug. 20, 1963], No. 33814/64. Headings HIE and H1K. [Also in Divisions H3 and H4] An electromechanical transducer or mechanical amplifier comprises an elongated semiconductor crystal (1) which exhibits both piezo-electric and piezo-resistive effects. A mechanical oscillation is propagated in the crystal in the same direction as a chargecarrier drift produced by application of a D.C. potential between end electrodes (2, 3, Fig. 1). The mechanical oscillations are associated with piezo-electrically produced electrical oscillations which travel at approximately the same velocity as the charge carriers. The piezoresistive effect results in a further electric field which reinforces the original field. Suitable semi-conductors are the A III B V  compounds, e.g. N-conductive GaSb or P-conductive GaAs. In the latter, the maximum piezo-electric effects are in the 111 direction. The apparatus may be pulse-operated, both the mechanical oscillations and the direct potential being applied in the form of simultaneous pulses.
Patent GB-1395301-A (GB)
Title: Vacuum cleaner
IPC: A47L9/19
Filed: 1973-07-17
Abstract: 1395301 Vacuum cleaner PHILIPS GLOEILAMPENFABRIEKEN NV 17 July 1973 [20 July 1972] 33911/73 Heading A4F [Also in Divisions B 1 and G 1] A vacuum cleaner is provided, in a tube portion 1 situated between a suction nozzle and a dust filter, with an element 2 which may regulate the pressure at the nozzle since an opening 4 in the tube 1 is closable by the element 2, and also indicate the extent of clogging of the dust filter by functioning as a pressure sensitive device. In one embodiment, Fig. 3, an aperture 9 in the element 2 is in communication with the inside of the tube 1 whilst a second aperture 16 communicates with the ambient atmosphere. Since the apertures 9, 16 are separated by a flexible diaphragm 10 connected to a slide 12 which is provided with indicating means, e.g. red marks 13, any pressure difference in the tube 1 due to clogging of the filter causes the slide 12 to move. A window is provided with, for example white marks 15, so that movement of the slide 12 relative to the window serves as an indication of clogging. In a further embodiment, Fig. 5 (not shown) a scale is attached to a piston one face of which is in communication with the tube interior whilst the opposite face is in communication with the ambient atmosphere. In a third embodiment, Figs. 6 and 7 (not shown) a spring-biased piston moves over an inner cylinder, the inside of the piston being open to the tube pressure whilst the outer surface of the piston is open to the atmosphere.
Patent GB-1356031-A (GB)
Title: Methods of stripping electrically conductive material from marginal bands of substrates having an electrically conductive coating
IPC: B23K26/08
Filed: 1971-07-21
Abstract: 1356031 Removing material by lasers; making capacitors SIEMENS AG 21 July 1971 [23 July 1970] 34091/71 Headings B3V and B3A [Also in Division H1] An uncoated marginal band on a substrate having an electrically conductive coating is produced by directing a laser beam substantially parallel to the coating surface and relatively moving the beam and substrate. As described, an insulating foil, e.g. polyethyleneterephthalate or polycarbonate, coated with metal, e.g. aluminium, or carbon is formed into a coil 1, which is rotated by a friction drive wheel 7 and moved perpendicular to the axis of rotation so that the laser beam 3 sweeps the entire end face 2 of the coil 1 to remove a marginal band of the coating without damaging the insulating foil. Two processed foils may be coiled together in interleaved relationship with the uncoated bands at opposite ends to form a capacitor. In another embodiment, a laser beam is directed over the area of a side of a stack of foils so as to remove a marginal band from each foil, the stack being used to make a laminate capacitor.
Patent GB-914089-A (GB)
Title: Improvements in or relating to breather valves for hydraulic apparatus
Inventor: FRYATT LESLIE ALVA
IPC: F16K17/36
Filed: 1961-09-23
Abstract: 914,089. Valves. MASTABAR MINING EQUIPMENT CO. Ltd. Sept. 23, 1961, No. 34147/61. Addition to 850,544. Class 135. In a venting valve in which, as in the parent Specification, a ball 22 carried by a pendular member 24 is caused to engage a seat 14 on tilting of a container to which the valve is fitted, closure of the valve due to expulsion of air when hydraulic medium is returned to the container is prevented by the provision of a bush 32 slidable in the venting bore and having an enlargement 34 on the upper surface of which air pressure is effective to depress the bush so that an inclined surface 38 makes contact with the ball. The chamber above the enlargement 34 is closed by a disc 40 having a dimple 42 to prevent engagement of the enlargement with the disc.
Patent GB-836354-A (GB)
Title: Improvements in or relating to photometers
Inventor: REID JOHN ALEXANDER
IPC: G01N21/55
Filed: 1955-11-29
Abstract: 836,354. Measuring reflection. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 28, 1957 [Nov. 29, 1955], No. 34179/55. Class 40 (3). In a photometer for measuring the efficiency of a reflex reflector, light from a source S passes through a small hole E, a half-silvered mirror M and a collimating lens D to the reflector R from which it is returned through the lens D and reflected by the mirror M on to a photo-cell P, the hole E and a hole G in front of the photo-cell P being at the focal distance from the lens D. A light chopper C and a filter F may be provided. Back reflection from the mirror M may be absorbed by a surface LA.
Patent GB-641744-A (GB)
Title: Improvements in or relating to mole draining ploughs
IPC: E02F5/10
Filed: 1947-12-27
Abstract: 641,744. Mole ploughs. PATRICK & WILKINSON, Ltd., and WILKINSON, T. Dec. 27, 1947, No. 34295. [Class 6(i)] A mole-plough, for use with a tractor having vertically-spaced draught links, comprises a pair of substantially triangular plates 1 having attachments 3, 26, for the upper and lower links and receiving, in the slot between them, the vertical stem 17 of the mole 11, and a disc-knife 7 which precedes the mole. The attachment means comprises arms 26 engaging the upper hitch link and a pair of transverse shafts 3 having outer ends 4 formed to engage the ball joints of the lower draught links. The sharpened stem 17 is adjustably! located by a block 23 and a pin 20 co-operating with aligned holes 22 and 21 in the stem and the plates 1. The stem is reversible and the mole may be mounted on either end by pins 29. The mole has a, bulbous rear end 13 for closing the slit made by the stem 17. A sub-soil tool 27 may replace the cylindrical mole 11.
Patent GB-994450-A (GB)
Title: Apparatus for the application of high frequency electrical energy to liquid materials
IPC: A23L3/01
Filed: 1962-09-07
Abstract: 994,450. Evaporation of liquids ; dielectric heating. R. G. SARGEANT. Sept. 7, 1962, No. 34316/62. Heading B1B. [Also in Division H5] Water is removed by evaporation from liquid mixtures, e.g. fruit juices or mixtures of water with hydrocarbon and other oils and liquid fuels, by use of dielectric heating. As shown, citrus juices are passed through a centrifuge 1 to separate the water-containing portion at 1a from the ester-carrying portion at 15. The former portion is then pumped, via pipes 1b, 2a, through a dielectric heating arrangement 3 (see Division H5), and then through a spray head 10a which directs the liquid into contact with the walls of evaporating chamber 10. Steam-operated air ejectors 5, 5<SP>1</SP> draw vapours from chamber 10 through condensers 4, 17, condensate being removed by pump 6, and maintain a high vacuum in chamber 10 such that water evaporates at 70 ‹F. Refrigerating gas is supplied to condenser 4 by a compressor. Water from the condenser (not shown) of the refrigeration system is passed through condenser coil 17a and is then used to heat the walls of chamber 10. The dielectric heating arrangement 3 may alternatively project into chamber 10 and replace spray 10a, Figs. 8, 9 (not shown).
Patent GB-1443516-A (GB)
Title: Actuators
IPC: F16J15/54
Filed: 1972-07-21
Abstract: 1443516 Semi rotary actuators A R B NASH 18 July 1973 [21 July 1972] 34366/72 Heading F1F In a semi rotary actuator having a casing 1, Fig. 1 and a piston 2 non rotatably mounted by way of splines on a shaft 4, the piston comprises a vane 3 formed by two opposed identical parts 16, bolted together, each being formed by a metal die casting or plastics moulding, and having a peripheral lip seal 12. In a preferred embodiment, the parts 16 are bolted together by bolts 18, Fig. 2, and the lip seal 12 comprises two, juxtaposed peripheral half seals 30 extending around a respective recess 22 in each part 16. A back-up plate 32 maybe clamped between the half seals 30 to prevent their distortion. 'Each half seal 30 comprises a bead 42 that seats in a complementary groove 44, a root portion 34 and a wing 36 that projects obliquely away from the root portion and whose inner surface 40 is exposed to fluid-pressure to enhance sealing. The piston 2 maybe attached to the shaft 4 by a single bolt passing through a bore in a central region of the shaft having a larger diameter than the shaft ends or by a pair of bolts passing through diametrically opposed regions of a peripheral groove on the shaft which interrupts the shaft's splines.
Patent GB-804181-A (GB)
Title: Improvements in or relating to induction machines
Inventor: WILLIAMS FREDERICK CALLAND
IPC: H02K17/30
Filed: 1955-12-01
Abstract: 804,181. Induction motors. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 27, 1956 [Dec. 1, 1955], No. 34397/55. Class 35. In a variable-speed induction motor having a spherical rotor with intersecting conducting paths as described in Specification 760,250, the stator consists of a single structure composed of two cores having winding slots skewed by 30-85 degrees with respect to the direction of rotation, so that the rotor is influenced by the same number of poles when the stator is rotated. The laminations 40 are secured, with suitable packing between them at their outer part, radially within rings 50, 51 and between spacing members 61, 62. The laminµ are axially staggered to produce the necessary skew of the slots. The two stator parts are secured together round the rotor by bolts 63 or by suitable spacers, and the speed is controlled by rotation by handle 68. Ideally the stator parts may be of parallelogram shape with opposite sides parallel to the slots.
Patent GB-1187333-A (GB)
Title: Eddy Current Testing System
IPC: G01N27/90
Filed: 1968-07-18
Abstract: 1,187,333. Electro-physical measurement - eddy current testing. F.W. BELL, Inc. July 18, 1968 [July 21, 1967], No.34415/68. Heading G1N. In an eddy current tester using a Hall-plate detector, Fig. 2, the coil 8 is driven at frequency F1 by oscillator 15; the Hall-plate 5 is driven at frequency F2 by oscillator 19; and the difference frequency output (F1-F2) is selected by tuned amplifier 20, whereby the effects of induction in the Hall-plate at high frequencies F1 and stray currents at frequency F2 are eliminated from the output signal. Co-ordinate field measurement In an alternative arrangement Fig. 3 the Hallplate is fed with the beat frequencies derived from a mixer 21 fed from the coil oscillator 15 and the second oscillator 19, and the amplifier 20 is turned to the frequency F2 of the second oscillator. The Specification shows mathematically that with the mixer fed directly from the coil drive the Hallplate output represents the Y component of the field, while if the coil signal to the mixer is phaseshifted 90 degrees the Hall-plate output represents the X component of the field. Both components may be derived simultanously by using two "local oscillators" operating at frequencies F2 and F3; two mixers, one with a 90 degrees phase-shifted coil signal and having two output amplifiers tuned to F2 and F3 respectively Fig. 5 (not shown). The same principle may be applied to a differential field detector employing two Hallplates disposed side by side with their outputs connected in opposition Fig.6 (not shown).
Patent GB-1201182-A (GB)
Title: Artificial hand for prostheses with bio-electrical control
Inventor: YAKOBSON YAKOV SAVELIEVICH
IPC: A61F2/58
Filed: 1967-08-11
Abstract: 1,201,182. Artificial hands. TSENTRALNY NAUCHNO - ISSLEDOVATELSKY INSTITUT PROTEZIROVANIYA PROTEZOSTROENIYA. 11 Aug., 1967, No. 34592/67. Heading A5R. An artificial hand for control by bioelectric signals from cut muscles of a natural arm stump comprises two individual and independent lines of control for actuating the fingers 2 and the thumb 5, respectively, each line of control incorporating a flexible link 20, 21 and an independent reversible motor 13 for control by the bioelectric signals and operatively connected with lever hinge systems simulating the phalanges of the four fingers and the thumb, respectively. In operation one motor 13 imparts rotation, in a direction corresponding to the signals received, through gearing 14 to a lead screw 16 to displace a slide 19. The slide operates rockers 27, 28 which are connected by rods 29, including ball and socket joints 10, to each of the hinges 2. The fingers are hinged to the hand at joints 22 and are opened or closed according to the direction of the motor 13 and resultant direction of displacement of the slide 19. Similary, the second motor 13 rotates a lead screw 17 to displace a slide 18 the slide 18 being connected with a rotatable crank rod 26 which flexes or extends the thumb about a hinge 11 according to the direction of the motor. The lead screws 16, 17 and slides 19, 18 are so constructed that they cannot be displaced by external forces on the fingers or thumb. A mechanism 6 including a spring lock permits passive abduction of the thumb by rotation about a pivot 25 and the ungual phalange of the thumb may be flexed at a joint 9. Rotation of the hand relative to the arm is permitted by a ball bearing connection 7. Elastic links 8 are connected between the rockers 27, 28 and the frame of the hand.
Patent GB-1393285-A (GB)
Title: Clutches
IPC: F16D27/112
Filed: 1972-07-25
Abstract: 1393285 Magnetically operated friction clutch GKN TRANSMISSIONS Ltd 25 July 1972 34703/72 Addition to 1296833 Headings F2C and F2L A vehicle multiplate friction clutch, in which a friction plate 18 is held between a presser plate 16 and a flywheel 12 to transmit drive, the clutch is engaged by a permanent magnet 35 and disengaged by energization of an electromagnet 45, which produces a flux opposing that of the permanent magnet 35. The winding of the electromagnet is designed so that the current which passes through it decreases as the flux level from the permanent magnet decreases due to temperature rise, the winding 45 here being of aluminium foil and the permanent magnet of a barium ferrite ceramic composition. The two magnets are in a housing 36, 37 fixed (adjustably) to the clutch housing 10, the flux path 21 through the clutch plates 14, 18 being defined by annular conductive portions 24, 26 and 28, 29) thereof separated by non- magnetically conductive portions (27, 30) thereof. An electronic circuit (Fig. 3, not shown), is provided wherein a variable resistor coupled to a clutch pedal controls the current through winding 45 and so regulates the engagement of the clutch, although this current may be controlled in relation to other parameters such as input or output speeds or the vehicle ignition system. The presser plate 14 and flywheel 12 are interconnected by flexible straps 15.
Patent GB-621177-A (GB)
Title: Improvements in and relating to means for controlling the speed of rotating devices or machines
IPC: H02P15/00
Filed: 1946-11-22
Abstract: 621,177. Electromagnetic clutches. BRITISH THOMSON - HOUSTON CO., Ltd., and JEFFERSON, H. F. Nov. 22, 1946, No- 34711. [Classes 35 and 38 (iv)] In a system in which one or more electromagnetic slip couplings are driven from a constant speed source and simultaneously controlled by mechanically coupled field rheostats, each main field rheostat has a trimming rheostat which can be connected to the common operating means and which comprises parts connected in series and parallel with the main rheostat. As shown in a form involving a pair of simultaneously controlled couplings with field windings 4c, 6c respectively, the main rheostats 3, 5 have trimming rheostats 4, 6 with series parts 4a, 6a and shunt parts 4b, 6b. Each rheostat is operated from the common control through a clutch, shown as 11a, 11b, 11c, 11d respectively. By disengaging these clutches the relative position of the rheostats can be adjusted to suit the characteristic of the drive and gearing may be used between the main and trimming rheostats. A mechanical arrangement for operating the rheostats and clutches is described. Specification 619,010 is referred to.