baber/WOPTO huggingface dataset:
Patent GB-1347548-A (GB)
Title: Apparatus for controlling a line-commutated current convertor
IPC: H02M7/757
Filed: 1971-07-30
Abstract: 1347548 Controlling converters SIEMENS AG 30 July 1971 [18 Aug 1970] 36085/71 Heading H2F [Also in Division G4] In a control system for a HVDC converter 1, the effect of harmonics in the A.C. is minimized by a "vector phase filter" 13, defined as comprising a two-phase harmonic-free generator, the phase of which is locked to that of the supply by means of a proportional plus integral controller (Fig. 4), the two-phase output being used to provide control pulses for the converter 1 at an angle depending on the difference between the required and actual converter output. As described, the three-phase input 7, 8, 9 is converted at 10 into two-phase signals at 11, 12 which control the phase of a two-phase harmonic-free generator (Fig. 4) comprising integrators 35, 36 and multipliers 46, 47, 37, 38 in a closed loop containing a proportional + integral controller 49. The generator amplitude is controlled by auxiliary loops containing multipliers 40, 41, 44, 45. The current on the D.C. side is monitored at 7<SP>1</SP> and compared with the required value i*, the difference being fed via a controller 6 and limiters+K1 to terminal 24 of a phase rotator 18. A further loop comprising a squarer 19, adder 20 and square-root extractor 21, 22, ensures that the converter output voltage is proportional to control voltage U st . Linearity of control may be improved by setting switch 26 to its vertical position, when a linearizing circuit 27 (Fig. 11, not shown) is inserted. Control pulses are provided at 33a ... 33f for the rectifiers of the bridge converter 1 by means of a distributer 32 (Fig. 6, not shown) comprising six differential amplifiers feeding respective threshold circuits and gates. Modifications.-In Fig. 8 (not shown) a separate "vector phase filter" and phase rotator 18 is provided for each input phase of an unbalanced supply. Figs. 9 and 10 (not shown) relate to a "vector phase filter" 13 operable from single phase inputs. Phase changing.-In Fig. 5 (not shown) a pair of amplifiers are controlled by two pairs of multipliers so as to provide phase shift of the two-phase signals at 16, 17 in dependence on the control signals at 23, 24.
Patent GB-761037-A (GB)
Title: An improved thimble and manner of manufacturing the same
IPC: D05B91/04
Filed: 1954-12-14
Abstract: 761,037. Injection-moulding thimbles. TOWERS, R. Dec. 14, 1954 [Dec. 17, 1953; June 11, 1954], No. 36143/54. Class 87(2). [Also in Group VII] A thimble, Fig. 2, moulded from a thermoplastic material such as polystyrene or cellulose acetate, has an integral shroud 6 projecting from its open end so as to guard a radially disposed thread-cutting blade 3 embedded therein. The mould, Fig. 4, comprises a male part 18 and a female part 10 which is formed with an annular recess containing a split ring 11. The blade is inserted into the split and is gripped about its cutting edge when the ring is contracted by means of a screw 21. An inlet passage 20 for the moulding composition leads through the male part into the moulding space for the rim bead at the open end of the thimble. In a modification, Fig. 12, a split ring 11<SP>1</SP>, in the form of a cone, is enclosed within a ring 11a interposed between the parts 10 and 18, the ring 11<SP>1</SP> being thereby contracted when the parts 10, 11a and 18 are closed together. It is stated that the mould may contain a plurality of cavities, when the split rings may be incorporated in a removable section which is chargeable with blades when separated from the mould.
Patent GB-877009-A (GB)
Title: Improvements relating to the control of the treatment of liquids
Inventor: SHAW FRANCIS JAMES
IPC: G01N21/78
Filed: 1958-11-11
Abstract: <PICT:0877009/III/1> Free chlorine in a chlorination process for cyanide bearing p  electroplating waste is detected by mixing a sample of the waste with starch iodide and passing it between a lamp and photocell. Electroplating waste in a tank 10 is pumped through a pipe 29 to a chlorinator 30 and back through a pipe 33.  A sample is taken through a pipe 11 and mixed with starch iodide from a container 14 in a sight glass 13.  When the sample turns black the changed output of the photocell 21 stops the pump 27 through an amplifier 24 and a thyratron 25.
Patent GB-302312-A (GB)
Title: Improvements in and relating to refrigerating compressors
IPC: F25B3/00
Filed: 1928-12-07
Abstract: 302,312. Akt.-Ges. Brown, Boveri, et Cie. Dec. 14, 1927, [Convention date]. Oscillating cylinder pumps. - A compressor in a small rotary refrigerating- plant, working e.g. on the Audiffren-Sing- run system, ;s driven by an eccentric member d mounted on a rotary main shaft extending through the condenser a of the machine and having a toothed wheel z'. The compressor cylinders k and counterpoise are suspended loosely from the shaft, which also carries a toothed wheel z<1> which drives the wheel z<4> through integral toothed wheels z<2>, z<3> journaled in the suspension c.
Patent GB-762975-A (GB)
Title: Improvements in or relating to refractory materials
IPC: C04B35/12
Filed: 1953-12-30
Abstract: A magnesia clinker consisting of magnesia, alumina, lime, silica, and iron oxide contains up to 4 per cent by weight of lime; silica in an amount such that the molecular ratio lime to silica is not more than 2; and a percentage weight of magnesium aluminate of 9,7 to 43,1. The clinker is prepared by mixing alumina with a slurry of magnesium hydroxide or oxide obtained from calcined magnesite followed by drying and calcining.  The hydroxide slurry may be obtained from calcined dolomite, alone or with sea water, or calcined limestone and sea water.
Patent GB-1262654-A (GB)
Title: Improvements in or relating to pressure transducers
Inventor: SHEPPARD JOHN ARTHUR
IPC: G01L9/00
Filed: 1968-07-30
Abstract: 1,262,654. Pressure transducer,pressure gauges. POST OFFICE. July 4, 1969 [July 30, 1968], No.36250/68. Headings G1L and G1N. A pressure transducer comprises a casing 1 divided by a bellows 2 into first and second non- communicating compartments 4, 5, the first being at atmospheric pressure and the second being filled with a gas of which the pressure is to be measured, which second compartment encloses, a potentiometer 14 the slider 16 of which is connected to the end face of the bellows. Alternatively the potentiometer may be connected to the end face of the bellows and the slider to the casing. An indicator rod 13 with calibration marks on it adjacent the end remote from the bellows end-face to which it is attached is slidable within the bore 9 to indicate pressure difference.
Patent GB-810938-A (GB)
Title: Improvements in or relating to dental apparatus
IPC: A61C1/05
Filed: 1956-11-27
Abstract: 810,938. Dental appliances. RITTER CO. Inc. Nov. 27, 1956 [March 14, 1956], No. 36274/56. Class 81 (2). A dental handpiece is provided with two nozzles, one for air and the other for water, the two streams being directed to meet adjacent the cutting tool. Control means are provided to enable the jets to be used separately or together to form a spray. As applied to an angle handpiece each nozzle 94, 96 is supplied through a flexible tube 87, having a bored spigot 99 which engages in the rear end of the nozzle. The outlets 106, 107 are directed towards the cutting tip of the drill 93 so as to perform a cooling action as well as washing. Water is supplied from the main through a pressure regulator and metering valve and both air and water are controlled by solenoid-actuated valves which are energized through individual switches and through a contact operated by the motor foot switch, so that the valves are closed when the motor is switched off. In the case of a straight handpiece the outlets from the nozzles are directed along the axes of the nozzles to converge on the drill tip and, if a handpiece is to be changed, the spigots on the flexible tubes are merely withdrawn from the nozzles. Specifications 797,338 and 810,939 are referred to.
Patent GB-843797-A (GB)
Title: Improvements in electrical contact assemblies
Inventor: PRATLEY NORMAN RICHARD
IPC: H01R12/72
Filed: 1957-11-22
Abstract: 843,797. Making electrical components. BELLING & LEE Ltd. Nov. 22, 1957, No. 36411/57. Drawings to Specification. Class 83 (2). [Also in Group XXXVI] The relevant subject-matter of this Specification is substantially the same as that described in Specification 826,398 but the claims differ.
Patent GB-1219023-A (GB)
Title: Sound insulating products made of mineral fibres and thermoplastic materials
IPC: D04H1/4218
Filed: 1968-07-31
Abstract: 1,219,023. Laminates. COMPAGNIE DE SAINT-GOBAIN. 31 July, 1968 [8 Aug., 1967; 14 May, 1968 (2)], No. 36554/68. Heading B5N. [Also in Divisions B2 and D1] A sound insulating product consists of mineral fibres, e.g. glass, of length at least a decimeter and diameter of 20-40 Á felted in generally parallel planes and bonded by 20- 50% wt. of elastomer in the form of a latex and an additive which produces chemical linkage between the mineral fibres and the elastomer and/or coagulation of the elastomer. The elastomer can be applied as an aqueous emulsion to the felt and may be polychloroprene, carboxylated polystyrene, polystyrene, polybutadiene or acrylonitrile-butadiene copolymer. The additive may be mercaptosilane resorcinol-formaldehyde resin with acrylic thickener, methyl cellulose, ammonium nitrate, ammonium sulphate or ammonium chloride. The product can be made by collecting the fibres on a conveyer which is subjected to a vacuum, applying the binder, partially drying by squeezing, compression or gravity, further drying, e.g. with infra-red heaters, and crosslinking the polymer binder. If the product is wound into a roll, it can be reheated under tension during unwinding so as to remove transverse folds. The product can have its surface pores filled by coating with (a) binders, e.g. styrene-butadiene copolymer, polystyrene, polyvinyl acetate, bitumen, phenol-formaldehyde resin and starch; (b) fillers such as chalk, silica, diatoniaceous earth and perlite; and (c) mineral or organic fibres of diameter of 1 to 10 Á. Alternatively the product can be coated, preferably after the above mentioned reheating with a paste of vinyl resin which is cooled and set on the felt surface. The product can be laminated with paper, carpet moquette, glass muslin, wood, tiles, metal, glass-resin complexes or polyvinyl chloride using binder e.g. aqueous polyvinyl acetate.
Patent GB-917513-A (GB)
Title: Connecting means for a device for securing a metal strap or like flexible binder around a container, box, package or the like
IPC: B65B13/30
Filed: 1960-10-25
Abstract: 917,513. Seals &c. VEREENIGDE METAALVERPAKKING MAATSCHAPPIJ N.V. Oct. 25, 1960 [Nov. 20, 1959], No. 36650/60. Class 146 (2). A device for securing a metal strap 3 around a container 2 or the like comprises co-operating fingers 7 and knives 11 mounted respectively on holders 6, 10 both slidable in a guideway 5 and swingable away from the container 2. The holder 6 has rims 8 which increase in thickness from the finger end and which engage grooves 9 in the guideway 5. The knives 10 are operated by a block 13. The arrangement is such that after the fingers 7 have moved to the operative position shown in Fig. 1, the knives 11 are operated to cut the band and force the tongues thus formed on to the face of the strap by means of the noses 16. On retraction of the knives, the holder 10 abuts a projection 17 to withdraw the fingers 7 and due to the transverse clearance of the rims 8 in the grooves 9 to swing the holder away from the container 2.
Patent GB-304185-A (GB)
Title: Improvements in cleaning appliances
IPC: A47L13/255
Filed: 1928-12-13
Abstract: 304,185. Kurpiel, L. Jan. 16, 1928, [Convention date]. Holders with clamping devices for mops. - Mop material consisting of a band of wound fabric terminating in fringes is detachably held between two parts of a casing removable from a handle, one or both parts being provided with spikes which extend between the fringes and support the band. In the construction shown in Figs. 1 and 2, the band 5 of the mop material is secured to a casing consisting of two parts 1, 3 provided with spikes 2 which are bent inwardly. The parts taper to cylindrical form at the top where they are screwthreaded to engage a handle 7. In a modification shown in Fig. 3, the mop material is clamped between two hollow members 1, 3, the inner one of which is provided with spikes 2, and is screwthreaded to engage a spigot 7 on the handle 8. The outer member at the top is engaged by a shoulder on the handle. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a construction similar to that shown in Fig. 3 but with the spikes on the outer member. This subject-matter does not appear in the Specification as accepted.
Patent GB-896881-A (GB)
Title: Improvements in or relating to methods of producing permanent magnet materials and to the permanent magnet materials so produced
IPC: H01F1/06
Filed: 1958-11-17
Abstract: 896,881. Making composite wire; drawing; altering physical properties. ROLA CO. (AUSTRALIA) PROPRIETARY Ltd. Nov. 17, 1958 [Nov. 20, 1957], No. 36940/58. Drawings to Specification. Classes 83 (2) and 83 (4). [Also in Group XXXV] A method of producing permanent magnet materials from a plurality of multi-domain ferromagnetic elements each composed of at least one ferromagnetic material selected from the group consisting of ferromagnetic metals and ferromagnetic alloys of metals, comprises the steps of enclosing each ferromagnetic element in a casing composed of at least one material selected from the group consisting of metals and alloys of metals and different from the ferromagnetic material selected for the ferromagnetic elements, assembling a plurality of the encased ferromagnetic elements together to form a composite body and then elongating the composite body until substantially all of the ferromagnetic elements are single domain. In an example a tube of 5% tin bronze of 0.024 inch wall thickness is drawn over a 0.07 inch diameter iron wire and the composite wire is drawn to a diameter of 0.005 inch. The wire is annealed at approximately 420‹ C. for half an hour at stages corresponding to about 75% area reduction. A bundle of 300 of the 0.005 inch diameter composite wires is inserted in a 5% tin bronze tube which is drawn tightly over the bundle to form a compact of 0.125 inch diameter. The compact is drawn-to 0.005 inch diameter, annealing being carried out at about 50% area reduction. A second compact is made from a bundle of 300 first compacts of 0.005 inch diameter over which is drawn a 5% tin bronze tube of 0.014 inch wall thickness. The second compact is drawn and annealed as for the first compact and the resultant 0.005 diameter composite wire has an intrinsic coercive force about 100 oersteds before anneal and 200 oersteds after anneal. Other examples are given in the Specification. The iron wire is a low carbon 0.1 manganese semi-killed steel wire hydrogen purified.
Patent GB-1224237-A (GB)
Title: Improvements in bactericidal and/or fungicidal compositions
Inventor: PURKISS BASIL EDWARD
IPC: D21B1/38
Filed: 1968-08-02
Abstract: 1,224,237. Papermaking. BDH CHEMICALS Ltd. 17 July, 1969 [2 Aug., 1968], No. 36950/68. Headings D2A and D2B. [Also in Division A5]  A method for impregnating paper or board with a bactericidal and/or fungicidal composition comprises adding to the wet end of a paper or board machine at a point where the stock consistency exceeds 2.5% a bactericidal and/or fungicidal composition comprising an aqueous solution of an alkali metal salt of dichlorophen, an acid and a polar organic solvent. Acids specified are sulphuric acid, acetic acid and citric acid whilst the polar organic solvent may be isopropanol, acetone, ethyl alcohol or methyl ethyl ketone.
Patent GB-1198267-A (GB)
Title: Filter with Anti-Drainback Valve
Inventor: WILHELM JOHN RICHARD
IPC: F16K11/065
Filed: 1967-08-11
Abstract: 1,198,267. Valves. PUROLATOR Inc. 11 Aug., 1967, No. 37051/67. Heading F2V. [Also in Divisions B1-2] An oil filter for an I.C. engine comprises an anti-drain, non-return valve in the form of an annular disc of elastomeric material 59, which is urged to engage seat 52a by its own elasticity, resulting from its being constrained 'to frustoconical form, and by a spring disc 60 (Fig. 2, not shown), which has a peripheral ring from which extend radial fingers engaging shoulder 45b. A spring 47 urges the pleated, resinimpregnated paper filter element 42, spring 60 and disc 59 against end cover 49, which is permanently secured to casing 41. The filter is of the disposable, screw-on type and incorporates a by-pass valve 48. Inlets 53a are made by punching out tabs 53, which grip end sealing ring 56.
Patent GB-1375083-A (GB)
IPC: G01N27/00
Filed: 1972-08-09
Abstract: 1375083 Electro-physical measurement - leak detectors LEYBOLD-VERWALTUNG GmbH 9 Aug 1972 [27 Aug 1971] 37238/72 Heading G1N In a halogen leak detector comprising a heated ion emitter and an ion collector, the collector is also heated, to avoid residual-ion-currents due to condensation on the collector after exposure to a high-halogen-content gas. Where the collector surrounds the emitter it is provided with a separate heating coil Fig. 1 (not shown), but where the collector is within the emitter it may be heated by radiation from the emitter, Fig. 2 (not shown).
Patent GB-943682-A (GB)
Title: Thermographic method for copying indicia
Inventor: WEEL WLATER H VANDER
IPC: B41M5/382
Filed: 1959-11-03
Abstract: A thermographic copying transfer sheet comprises an infra-red transparent support and a coating thereon of a coloured heat-sensitive fusible material comprising a substance melting at a temperature above 160  DEG F. with a smaller amount of a lower melting point substance together with not more than 5% of an oily substance.  The support may be of paper, regenerated cellulose, cellulose ester, vinyl polymer, polyester, or nylon and the fusible material may comprise a hard wax such as carnauba wax or montan wax with a smaller amount of a low melting point paraffin wax or microcrystalline wax, or a mixture of carnauba and montan waxes and a dye with or without an oil such as castor oil. Instead of natural waxes may be used thermoplastic synthetic resins, such as vinyl resins, polythene, halogenated polythene, or natural or synthetic rubbers with plasticizers if required.  Alkyd resins, modified rosin esters or rosin may be included to increase adhesion of the coating to the backing.  If the fusible coating is thin pigments may be used instead of dyes.  An aluminium or steel sheet also may be provided with a similar coloured heat-sensitive fusible material coating.
Patent GB-1438548-A (GB)
Title: Abrasive article
IPC: C09K3/14
Filed: 1973-08-07
Abstract: 1438548 Abrasive articles TYROLITSCHLEIFMITTELERKE SWAROWSKI KG 7 Aug 1973 [7 Aug 1972] 37384/73 Heading C4V Abrasive articles include abrasive grains, a binder and at least one active filler, in which, when the grains are porous, active filler or fillers is or are within pores of the grains, or in which, when the grains are porous or non-porous, the active filler or fillers is are or a hydroscopic, a liquid or a sublimating substance disposed on the surface of the grains, the active filler(s) being covered with a sealing coating. The active filler(s) within the pores of the grain may be a hygroscopic, a liquid or a sublimating substance covered with a sealing coating. When the active filler or fillers are within the pores, additional active filler(s) may be on the surface of the grains and when a hygroscopic, a liquid or a sublimating substance are covered with a sealing coating. The sealing coating may be an organic or inorganic polymer, and may contain elements able to react with the workpiece and/or the binder. The active filler, a metal sulphide or a metal halide. The abrasive grains may be corundum, zirconic corundum, silicon or boron carbide nitride or boride, or diamond. The binder may be a phenolic resin or an epoxy resin. Suitable active fillers are cryolite, elemental sulphur or sodium cryolite. The abrasive article may be an abrasive segment, honing stone, abrasive paper or an abrasive filler.
Patent GB-903690-A (GB)
Title: Improvements in or relating to photographic cameras
Inventor: HAHN WERNER
IPC: G03B7/12
Filed: 1959-11-04
Abstract: 903,690. Camera exposure meters. KAMERAUND KINOWERKE DRESDEN VEB. Nov. 4, 1959, No. 37426/59. Class 98 (1). A photographic camera has exposure factor setting members and includes a photo-electric exposure-measuring device having a pointer which passes over a stop-cam, a lever which explores said pointer and locks it against the cam and which is coupled to an exposure-setting member and a second lever coupled to another exposure member which is movable to affect the needle position. In the embodiment shown, an exposure meter has a pointer 8 which is normally clamped between a spring-urged lever 15 (having a cam surface X and being connected to a camera setting-ring through rod 26), and cams 13, 14. A lever 9 is spring-urged against a rod 33 connected to another setting-ring and is coupled by a spring 7 to the pointer 8. A galvanometer adjusting-screw 12 is provided for the lever 9. When the camera shutter is cocked a lever 18 is urged against lever 15 which is rotated to release pointer 8 which then moves to a position determined by the light intensity. The setting-ring connected to rod 33 is then adjusted which causes lever 9 to move until the tension thus formed in spring 7 moves the pointer 8 to a position between marks 23, 24. When the shutter is released, lever 18 releases lever 15 so that it is rotated by spring 16 together with rod 26 and the other setting-ring until cam surface hits the pointer 8. Differential gearing may be used to allow the film sensitivity or filter factors to be taken into account.
Patent GB-1351167-A (GB)
Title: Feeding and guiding apparatus for elongate workpieces
IPC: B23B5/12
Filed: 1971-08-10
Abstract: 1351167 Bar stock feeding and guiding TH KIESERLING & ALBRECHT 10 Aug 1971 [13 Nov 1970] 37526/71 Heading B3B Apparatus for guiding and feeding bar or tube in a machine comprises a pair of parallel driven rollers 2 and 3 mounted in upper and lower holders 10, 13 respectively which are displaceable transversely to the roller axes to accommodate variation in the size of workpiece located therebetween. The upper roller holder 10 is connected to the piston-rod 14a of the piston and cylinder assembly 14, 15 and the lower roller holder 13 is connected to the cylinder assembly 15 by tie rods 18, 19, which in turn serve as guides for the upper holder 10, whereby operation of the piston and cylinder assembly effects simultaneous displacement of the rollers and holders towards and away from each other equally on each side of the axis of the bar or tube to be machined. To ensure the accuracy of displacement of the rollers, a pair of links 22, 26 are provided one connecting the cylinder assembly 15 to a rotary disc 24b mounted in the machine frame and one connecting the disc to the upper roller holder 10, whereby during the operation of the piston and cylinder assembly, the link and disc mechanism transmit slight forces to overcome friction between the displaceable parts and maintain the axes of the rollers parallel whilst the actual clamping is effected directly by the piston and cylinder assembly.