baber/WOPTO huggingface dataset:
Patent GB-1187549-A (GB)
Title: Method of Cleaning Etched Silicon Surfaces
IPC: C30B31/04
Filed: 1968-07-01
Abstract: 1,187,549. Etching. SIEMENS A.G. 1 July, 1968 [5 July, 1967], No. 31416/68. Heading B6J. The surface of an etched silicon body is cleaned to remove surface contaminants by contacting with an aqueous iodine-potassium iodide (I 2 .KI) solution. According to examples the surface may have been etched with caustic potash (KOH) or HNO 3 /HF. The etched and cleaned surface may be subsequently subjected to diffusion to form P-N junctions in the body.
Patent GB-1074384-A (GB)
Title: Blended fibre bundles containing elastic fibres and method for producing the same
IPC: D01F6/72
Filed: 1964-08-04
Abstract: Polyurethanes derived from ethylene diamine and prepolymers obtained by reaction of diphenylmethane 4,41 - diisocyanate with polycaprolactone or polyethylene adipate are dissolved in dimethyl formamide, dimethyl sulphoxide or dimethyl acetamide to form solutions from which fibres are spun (Divisions B4-B5). Fibres are also spun from a solution, in dimethyl sulphoxide of a copolymer of e -caprolactam and hexamethylene diammonium terephthalate.  Further spinning solutions consist of dimethyl formamide solutions of graft copolymers made by reaction of acrylonitrile in presence of cerium ammonium nitrate and ammonium persulphate, with a solution of (1) acetalized polyvinyl alcohol in a mixture of dimethyl formamide and water; or (2) sulphobenzalized polyvinyl alcohol in a mixture of dimethyl formamide and water.ALSO:Blended synthetic fibre bundles consist of a mixture of elastic fibres and non-elastic fibres.  The bundles are made by extrusion of two spinning solutions or melts through a multi-orifice spinning means and the ratio of extruded elastic polymer to non-elastic polymer may be 1/99 to 60/40.  The elastic fibres may be polyurethane while the non-elastic fibres may be acrylonitrile polymer or copolymer, polyamide, polyolefin, polyvinyl alcohol or cellulose derivatives e.g. cellulose acetate. After stretching, drying and relaxing in steam non elastic fibres take up a looped or crimped configuration around elastic fibres (Fig. 12, not shown), the fibre bundles may then be bulked by draft-cutting and twisting, so as to cut a part or all of the non-elastic fibres. In one embodiment (Fig. 14, not shown) fibre bundles (31) are passed through drafting rolls (32, 32\sv) and (33, 33\sv) and aprons (34, 34\sv) to draft-cut the elastic fibres, and take up on a ring twister.  The bulkiness and elasticity of the yarn may be altered by heating and false-twisting.
Patent GB-1274441-A (GB)
Title: Improvements in or relating to motor cycle front wheel steering and suspension units
Inventor: DIFAZIO JOHN
IPC: B62K21/18
Filed: 1968-07-02
Abstract: 1,274,441. Cycle steering and suspension; wheel hubs. J. DIFAZIO. 1 July, 1969 [2 July, 1968], No. 31518/68. Headings B7C and B7E. A motor cycle steering and suspension unit comprises a pivotal steering support mounted within the wheel hub, the support consisting of a spindle 23 with a rigidly attached king-pin 22 supported by bearings 21, 20 in an inner hub 11 which is located by bearings 13, 14 in an outer hub 12. The spindle 23 is supported in bushes 24, 25 at the ends of suspension arms 26, 27 and the inner hub is attached by brackets 33 to a steering fork 34 which is linked by universal joints 36, 38 and radius arms 37 (which act in a push-pull manner) to a steering column 40. The outer hub thus rotates with the wheel and the inner hub pivots for steering about the king- pin 22 carrying the outer hub and wheel with it, while the spindle 23 can pivot about its axis in its connection on the arms 26, 27 to permit a variation in the king-pin trailing angle. The radius arms 37 may be telescopically variable in length. Spokes 17 are secured to flanges 15, 16 inboard of brake discs 18, 19 on the outer hub.
Patent GB-150214-A (GB)
Title: Improvements in electrolytic apparatus for the direct production of hypochlorites
IPC: C25B9/17
Filed: 1919-12-19
Abstract: 150,214. Pestalozza, P. Dec. 19, 1919. Cells; supporting electrodes; electrolytes, treating non- chemically; hypochlorites, obtaining. -A vat for the direct production of hypochlorites, which is divided by transverse partitions 3 constituted partly by bipolar electrodes 4 and made with staggered openings 3<1>, has the compartments thus formed provided with cooling devices, consisting of two pipes each of which forms loops 6<1> in alternate compartments. The shape of loop shown promotes circulation in the direction of the arrows. The pipes are preferably of glass, with rubber or like sections at the elbows. Carbon or graphite plates may be used as electrodes, and are fitted in watertight manner in the partitions.
Patent GB-172302-A (GB)
Title: Improvements in the treatment of carbonaceous and other materials
IPC: B01D3/08
Filed: 1921-11-29
Abstract: 172,302. Frank, F. Dec. 1, 1920, [Convention date]. Sulphur.-Materials are subjected in a closed chamber in which a partial vacuum is maintained to the direct action of a flame produced by burning a combustible mixture of gases containing oxygen in certain predetermined amounts so as to distil off volatile constituents and otherwise subject the materials to a heat treatment. By this method sulphur may be obtained direct from sulphur-bearing ores. The material is fed from a measuring wheel 32 rotated at constant speed into a casing 28 enclosing a conveyer screw 25. The hollow shaft 26 of the conveyer screw has apertures 35 and forms an outlet pipe for the volatile matter, this shaft being secured to. brackets 27 attached to the retort 10 whereby the shaft and conveyer rotate with the retort. A gas burner 50 projects a flame on to the material as it passes through the retort. The residue is lifted by arms 60 attached to the retort and dropped into a casing 61 enclosing a screw conveyer 64 mounted in a hollow tube 65 containing the pipe 52 leading to the burner, and is moved into a rotating discharge wheel 73 communicating with an outlet 70 leading into a tank 72. The volatiles are carried off by a fan 40 and passed into a settling chamber 42.
Patent GB-608632-A (GB)
Title: Improvements in radio object-detection and object-location systems
IPC: G01S7/06
Filed: 1945-11-27
Abstract: 608,632. Radiolocation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 27, 1945, No. 32051. Convention date, Feb. 28, 1939. [Class 40 (vii)] A pulse radar system comprises means for radiating the exploring signals successively into differently directed relatively fixed zones, as shown for example in Fig. 2, and means for receiving echo signals and for indicating the zone from which the maximum reflection is obtained. A pulse generator 1 is connected to a transmitter 3 which radiates an exploring signal from an aerial system comprising four directive aerial arrays, each of which comprises a radiator and a reflector dipole. The four arrays are connected sequentially to the transmitter by means of the continuously rotating switch 9 to produce the four directive beams illustrated in Fig. 2. The echo signals are received by the same aerial system and passed to receiver 37 ; alternatively, a separate aerial system for reception may be used. The output of the receiver is taken from a potentiometer 39 to two four-way switches 53, 55 which rotate in synchronism with switch 9 so that the connections to the horizontal deflection plates of the cathode-ray tube are alternately reversed and the electron beam is deflected to the left or to the right according as the radiation beam is to the left or the right of the mean direction of transmission. The output from the receiver is also applied to the vertical deflection plates of the cathode-ray tube, through the high-pass filters 59, 61 and switches 71, 73 so that the electron beam is deflected vertically in accordance with the instantaneous position of the radiation beam. A time-base voltage generated in circuit 27 is applied to the vertical deflection plates of the cathode-ray tube so that indications as shown in Fig. 4 are produced on the screen. Chokes 29 and filters 59, 61 prevent signals from receiver 37 from affecting the timebase circuit 27 and vice versa. By operating the system with switches 63, 65 open, a simpler indication, as shown in Fig. 3, is obtained, having no indication of misalignment in the vertical direction.
Patent GB-267617-A (GB)
Title: Improvements in radio receiving systems
IPC: H03D7/08
Filed: 1925-12-18
Abstract: 267,617. Standard Telephones & Cables, Ltd., (Western Electric Co., Inc.). Dec. 18, 1925. Thermionic heterodune receivers. -In a super-heterodyne receiver comprising a local oscillator 8, detector 6 for intermediate frequency, detector 21 for audiofrequency, and amplifiers 13, 14, 15, 23, the detector 6 and local oscillator 8 are coupled by a resistance 9, which serves also as grid leak for the detector 6 and is of such magnitude (e.g. 2 megohms) that tuning adjustment of either of the valves does not affect the tuning of the other. A condenser 25<11> connects the plate of one amplifier to the grid of the next amplifier but one, in order to check undesired oscillations. The input coupling includes separately adjustable coils 3, 4, and similarly the reaction coupling of the local oscillator 8 includes separately adjustable coils 10, 10<a>. The secondary windings of the transformers 16, 17, 18 are designed to cooperate with the inherent reactances of the circuits, including the internal valve-capacities, to select the intermediate frequency. The filaments are in series and the grids are tapped off the filament circuit at such points as will give the required grid bias.
Patent GB-283327-A (GB)
Title: Improvements relating to the generation of power by the use of tidal energy
IPC: E02B9/08
Filed: 1926-12-18
Abstract: 283,327. Pennington, R., and Mather & Platt, Ltd. Dec. 18, 1926. Tidal energy, utilizing.-A pontoon floating on the upstream side of a dam a is provided with a buoyancy chamber i and a turbine f supplied from a water storage compartment k, so that the effective head at the turbine shall remain practically constant. The compartment k is filled at the times of high tide by a siphon l or other means.
Patent GB-1009453-A (GB)
Title: Improvements in or relating to sweep generator circuits
IPC: H03K4/12
Filed: 1962-08-21
Abstract: 1,009,453. Photo-electric detection. SPACE TECHNOLOGY LABORATORIES INC. Aug. 21, 1962 [Aug. 21, 1961], No. 32122/62. Heading G1A [Also in Divisions H3 and H4] An electronic camera system employs an improved sweep circuit (see Division H3-5). Fig. 1 shows an application for the invention in photographing a mass of gas 24 heated to a temperature of millions of degrees for a period of a few nanoseconds. A pulse is generated by a photo-cell 32 at the beginning of the light emission from the gas 24 and is amplified by a thyratron trigger circuit 38 to provide the trigger pulse. The image of gas 24 is focused on to a photo cathode 14 of an image convertor tube 10. This tube is normally biased off on the control grid 18 except for the duration of a pulse of the order of one microsecond from generator 40. During this time, the output of the photo emissive cathode 14 is focused by means of electrodes (not shown) on to the fluorescent screen 16 thus producing an amplified image which may be focused on to a camera film 28. The sweep wave form may be applied to deflection plates 20, 22 during this time so that a streak picture may be taken. Alternatively, the sweep waveform may be used to provide a series of frames side-by-side on the fluorescent screen 16.
Patent GB-604630-A (GB)
Title: A new or improved decorating tool or instrument
IPC: B05C17/02
Filed: 1945-11-29
Abstract: <PICT:0604630/III/1> A stippling roller consists of a number of angularly shaped laminations, f, of flexible sheet material such as wash-leather-assembled on a spindle d to form a roughly cylindrical body with projecting corners.  The laminations may be produced by folding one or more elongated strips or they may be separate pieces. Their central portions may be stiffened by impregnation with shellac varnish.
Patent GB-1016696-A (GB)
Title: Improvements in and relating to electric measuring, indicating or control apparatus
Inventor: OUGHTON HARRY GEORGE
IPC: G05D23/27
Filed: 1961-09-08
Abstract: 1, 016, 696. Photo-electric control apparatus. FOSTER INSTRUMENT CO. Ltd. Sept. 7, 1962 [Sept. 8,1961], No. 32298/61. Heading G1A. [Also in Division G3] The invention relates to apparatus for comparing the intensity of a test source, for example a furnace, with that of a comparison source wherein the comparison signal is used to control or measure the intensity of the test source, for example to control the power input to the furnace (Fig. 1) or to continuously indicate its temperature (Fig. 2) (not shown). As shown in Fig. 1 the photo-resistor 11 receives radiation (visible or otherwise) alternately from the furnace 10 and the lamp 12 by means of the rotating apertured disc 14. The motor 13 controlling the disc 14 also controls the switching amplifier 15 receiving the pulsed output from the photo-resistor 11 whereby the pulses from one or other of the sources 10,12, are reversed in polarity. The mean output of the alternate positive and negative pulse train is indicated in the meter 17 and is applied to the control amplifier 18 to control the power input to the furnace 10. The arrangement in Fig. 2 (not shown) differs in that the output from the amplifier 18 controls the intensity of the lamp 12 to give zero output from the amplifier 15 thus giving an indication of the temperature of the furnace. A control signal may also be applied from the indicator 21 to the surface 10 if the furnace temperature departs from a predetermined range. Each embodiment may include a filter 22 to select monochromatic radiation.
Patent GB-1438277-A (GB)
Title: Rotary scythe mowers
IPC: C08J9/10
Filed: 1972-07-11
Abstract: 1438277 Removably supporting rotary scythe cutters MASSEY-FERGUSON PERKINS Ltd 10 July 1973 [11 July 1972] 32305/ 72 Heading A1F [Also in Division E2] The blades of a rotary scythe mower are pivotally mounted in a peripheral aperture of the mower's rotor by an arrangement comprising a pin 44 having upper and lower pairs of laterally projecting chamfered arms 50, 56, a welded wear plate 64 and a resilient plate 70 which is welded to the rotor at its inner end. To mount the blade, the blade is inserted between plates 64, 70 and the pin 44 is inserted through the apertures 68, 66, 45 until the flat, bottom surfaces of the lower arms 56 engage the plate 70 and the top flat surfaces 52 of the upper arms are held just above the lower surface of the wear plate by the resilient plate 70. The pin is turned through 90‹ with a tool whereby the upper arms chamfered side surfaces 54 cam with the wear plate aperture and thereby cam the resilient plate 70 downwardly. The lower arms ultimately  engage within the aperture 76 whereby the plate springs up to hold the upper surfaces of the upper arms against the underside of the wear plate 64 upon reverse procedure the chamfered side surfaces 60 of the lower arms cam the resilient plate downwardly whereby the pin can be turned and removed.
Patent GB-1132712-A (GB)
Title: Improvements in or relating to railway track tamping apparatus
Inventor: STEWART JOHN KENNETH
IPC: E01B27/16
Filed: 1965-07-28
Abstract: 1,132,712. Ballast tamping. CANADA IRON FOUNDRIES Ltd. 25 July, 1966 [28 July, 1965], No. 32329/65. Heading E1G. Two pairs W, X and Y, Z of tamping units are mounted longitudinally of a vehicle V, the units of each pair being pivotable about axes P to first squeeze the ballast under first and third sleepers A, C and then for the units X and Y to squeeze ballast under the second sleeper B. The -units have forked ends 15 vibrating in arcs under a crank drive from a motor 11 and are pivoted about axes P by hydraulic rams 26, 27.
Patent GB-1474955-A (GB)
Title: Radioactive beam detection
IPC: G01B15/00
Filed: 1974-07-22
Abstract: 1474955 Radiation collimators REPUBLIC STEEL CORP 22 July 1974 [23 July 1973] 32333/74 Heading G1A [Also in Division G6] A beam detection system in which a radio-active beam is transmitted to a detector over a distance of the order of tens of feet includes a collimating unit 1 comprising a radio-active source 3 and a collimator 2 comprising members 15 affording a plurality of elongate passages extending from a radiating face of the source 3 to provide a collimated beam of radiation. The members 15 may comprise parallel rods (17) Fig. 2 (not shown), e.g. of thoriated tungsten, the interstices between which define the passages (20); and, using a 1À0 cubic Caesium-137 source a collimaged gammaradiation beam can be produced over a distance of 50 feet. Alternatively, the members 15 may comprise parallel tubes (18) Fig. 3 (not shown), e.g. of stainless steel, the interstices between, and the bores of, which define the passages (20, 21); and, using a 1À0 cubic Americium-241 source, a collimated beam can be produced over a distance of 10 feet. The distance, r, over which the beam is of substantially constant intensity is determined by where: L is the length of the passages D is the diametral extent, of the detector face d is the cross-sectional width of one passage. In an application, the system is used in an automated hot strip with where detection of the passage of a steel slab is used to operate a clap shear and a desealer.
Patent GB-840516-A (GB)
Title: Improvements in or relating to electric arc furnaces
Inventor: SHAW CLIFFORD
IPC: C22B4/00
Filed: 1957-10-16
Abstract: 840,516. Casting-machines. CLINO FOUNDRY SUPPLIES Ltd. Oct. 15, 1958 [Oct. 16, 1957], No. 32357/57. Class 83 (1). [Also in Group XI] In a crucible 24 for melting and casting metal in vacuo between opposed carbon-rod electrodes 49, the crucible 24 is rotatable about a horizontal axis by a handle 23, and the electrodes are screwed in and out by hand wheels 17, all contained in an auxiliary casing 15 at each side. The casings 15 are heat-insulated from the crucible casing 10 by an annular chamber 31 for pumped coolant, which is also pumped through flexible pipes 63 to the triangular blocks 33, Fig. 4, embracing the ends of the electrodes and their adjusting-mechanism. The electrodes are secured at their ends by key-wedges 52 in grooves 51 therein. The guide-rods 32, on which the blocks 33 slide, are hollow to receive coolant. A mould may be clamped, inside of top casing 19, to the pouring-hole of the crucible, the mould being clamped against the top-plate 26 by a spring-pressed plate 72 releasable by a cam 78 and a hand lever 79.
Patent GB-1443164-A (GB)
Title: Preparation of polyamides
IPC: C08G69/28
Filed: 1973-07-06
Abstract: 1443164 Polyamides HALCON INTERNATIONAL Inc 6 July 1973 [6 July 1972] 32390/73 Heading C3R Polyamides are produced from a diamine and a nitrile by a process characterized by (A) ammonia content central and/or (TT) time-temperature schedule control. Both processes involve a first stage (a) in which an aqueous mixture of substantially equimolar proportions of a diamine and a dinitrile containing 20 to 95 wt. per cent water is heated in a reaction zone until at least 80% of the nitrile has reacted. In the (A) process in stage (a) the average content of ammonia is maintained at at least 1 wt. per cent in the liquid phase in the zone; (b) in a second stage, the reaction zone is vented to lower the pressure to a lower pressure which is sufficient to maintain the average ammonia content at at least 0À1 wt. per cent while heating until at least 90% of the nitrile has reacted; and (c) residual water and ammonia is eliminated by heating the reaction mixture from (b) while venting. In the (TT) process the reaction zone in stage (a) is maintained at 200 to 260 C.; (b) (i) the zone is vented to a pressure of 50 to 700 p.s.i.g. while the temperature is maintained at 200 to 260 C. for 10 to 120 minutes; (b) (ii) the temperature is increased by at least 10 C. to 260 to 300 C. while maintaining the pressure substantially constant for 10 to 180 minutes; (b) (iii) the temperature is maintained at 260 to 300 C. but the pressure is decreased to not less than atmospheric over 10 to 120 minutes; and (c) water and ammonia are eliminated by heating at 260 to 300 C. while venting for 10 to 240 minutes. In both the (A) and (TT) processes the heating in step (c) is sufficient to provide a polyamide of intrinsic viscosity above 1-15 (0À5 g./dl. in m-cresol at 29 C.) and the major proportion of the ammonia and water removed in the course of the process is removed at above 100 p.s.i.g. and not before 80% of the nitrile has reacted. Various dinitriles and diamines which may be used as reactants are mentioned as are monocarboxylic acids and primary a secondary monoamines which may be used to control molecular weight; in specific examples the reactants are adiponitrile and hexamethylene diamine with diphenylamine as regulation. Reference is made to U.S.A. Specification 2,245,129.
Patent GB-762733-A (GB)
Title: Improvements in or relating to terminals for resistance elements for variable electrical resistors
IPC: H01C1/148
Filed: 1954-11-09
Abstract: 762,733. Mounting terminals. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 9, 1954 [Nov. 12, 1953], No. 32400/54. Class 38 (1). A V-shaped terminal of nickel foil 4 is secured to a variable resistor comprising wire wound on a strip support 1. by two metal rings 5, 6 (as shown) or discs, which are pressed into an aperture 3 in the support so as to engage the limbs of the foil and press them together, the eyelets and foil being welded or soldered together.
Patent GB-1076323-A (GB)
Title: Polymerisation of alpha-olefins
IPC: B01J23/26
Filed: 1964-08-10
Abstract: A process for polymerizing a -olefins comprises (a) treating a solid catalyst carrier with chromyl chloride, activating the catalyst system obtained by heating it in the presence of an inert gas or an oxygen-containing gas; and (b) contacting the activated catalyst system with an a -olefin in the presence of an organic liquid solvent or diluent.  Specified olefins are ethylene, propylene, isobutene, pentene-1, hexene-1, butadiene and isoprene. Specified solvents and diluents are propane, butane, isobutane, n-pentane, iso-pentane, n-heptane, iso-octane and cyclohexane. Specified carriers are silica, alumina and silica/alumina. Examples describe the polymerization of ethylene in (1)-(3) cyclohexane; (6), (9) and (11) n-heptane; and (12) isooctane; of propylene in (4) n-heptane and hexene-1 in (5) n-heptane using catalysts formed from chromyl chloride and silica/alumina; and the polymerization of ethylene in n-heptane in the presence of catalysts formed from (7) chromyl chloride and alumina; (8) chromyl chloride and silica; and (10) chromyl chloride, chromyl fluoride and silica/alumina.
Patent GB-175089-A (GB)
Title: An improved contrivance for centering and holding handles and the like for boring
IPC: B23B49/04
Filed: 1920-11-18
Abstract: 175,089. English, G. W. Nov. 18, 1920. Drilling-machines. - A work-holder which centres knife-handles, rods, &c. for drilling or centring consists of a slide 6 provided with uprights 11, 14, the latter being axially adjustable. The work is held between cones in the upright 11 and in the member 16 by spring pressure 19 applied to a bar 20, which is adjustably mounted on parallel rods 18 sliding in the uprights and carrying the member 16 at their forward ends. For releasing the work the slide is withdrawn by a lever 7 till the bar 20 abuts against a fixed stop 25, further withdrawal separating the cones and permitting the ejector 22 to enter the cone in the rear upright. The forward upright is slotted to permit entry of the work and the rear upright carries a detachable face 13 which is similarly slotted to prevent the work from rotating. A cam or wedge may replace the springs for applying the gripping pressure. A shoot 26 may be provided to lead away the work.