baber/WOPTO huggingface dataset:
Patent GB-673320-A (GB)
Title: Improvements in or relating to moulds for casting metals
IPC: B22C3/00
Filed: 1950-08-10
Abstract: 673,320. Mould materials. ALUMINUM CO. OF AMERICA. Aug. 10, 1950 [Aug. 17, 1949], No. 19907/50. Class 38 (i). A porous mould body is provided with a smooth non-porous graphite surface by coating it with a suspension of colloidal graphite in a volatile liquid, the proportion of graphite not exceeding 15 per cent by weight of the liquid, drying the body and thereafter baking it at 500‹ to 800‹ F. for at least fifteen minutes. In order that the coating may adhere firmly, the body should have pores of from four to forty microns. The volatile carrier should have a boiling-point within the range 100-500‹ F. and have a low viscosity, such as hydrocarbons in which 10 per cent are distilled below 347 ‹ F. and not less than 95 per cent below 464‹ F. Examples are petroleum, naphtha and mineral spirits. The wetting power of the carrier may be increased by the addition of small amounts of metallic salts of long-chain alkyl acids, aryl substituted long-chain alkyl acids or aromatic acids, examples being nickel, zinc, or calcium naphthenates, calcium stearate, calcium phenyl stearate, wax aluminium phenate and aluminium carboxylate. The mould body is preferably of dense graphite of about 25 per cent porosity and the suspension is conveniently applied by spraying or by immersion for up to thirty minutes, the mould then being dried at a temperature below 300‹ F. Coating and drying may be repeated several times before the final baking. A mould so coated is stated to be particularly suitable for the continuous casting of aluminium and aluminium base alloys having high surface quality and for other non-ferrous metals such as magnesium and copper and their alloys.
Patent GB-1501050-A (GB)
Title: Cooled turbine blade or vane
IPC: F01D5/18
Filed: 1976-05-14
Abstract: 1501050 Turbine blades BBC BROWN BOVERI & CO Ltd 14 May 1976 [16 May 1975] 19932/76 Heading FIT A hollow turbine blade is provided with inserts 3 each having stepped overlapping walls 5 with ports 6 defining a series of stages for the successive impingement against blade wall 1 of cooling air flowing from the insert interior 2 to a discharge duct 7. The latter leads to ports 4 in the pressure surface of wall 1 and in the suction surface adjacent the trailing edge. Cooling in the latter region is improved by pins 8.
Patent GB-1491397-A (GB)
Title: Rotary film evaporating apparatuses
IPC: B01D1/22
Filed: 1976-05-14
Abstract: 1491397 Rotary film evaporator A N MARCHENKO and A B TJUTJUNNIKOV 14 May 1976 19936/76 Headings B1B and BIT A rotary film evaporator comprises a vertical housing 1 having a cylindrical side wall and being vertically sub divided into a plurality of intercommunicating sections 2, heating means (e.g. jacket 3) for heating the side wall, an axially extending shaft 9 in the housing, and a respective hollow spraying drum 10 accommodated within each said section and mounted concentrically on the shaft, the side wall of each drum comprising a plurality of individually longitudinal bars 17 extending parallel to the drum axis, each of which has a substantially S-shaped cross section (Fig. 3) and each of which is so arranged that its longitudinal outer edges 23, 24 extend into the indented portions of the adjacent bars 17 defining therewith labyrinth like passages for separating droplets from vapour. The portions of the bars which are furthest from the shaft are provided with apertures 20 for the passage of liquid. The evaporating apparatus also comprises means 6 for feeding a liquid to be evaporated into the uppermost part of the housing, means 7 for withdrawing a concentrate from the lowermost part of the housing, means 8 for withdrawing the vapour from the internal space of the housing, and means 14 situated intermediate each adjacent pair of intercommunicating sections for collecting the evaporating liquid flowing down the housing wall of the upper section of the pair of sections and for directing it into the spraying drum of the lower section of the pair of sections.
Patent GB-660272-A (GB)
Title: Improvements in and relating to electric control systems
IPC: H05B6/50
Filed: 1948-07-26
Abstract: 660,272. Automatic tuning control systems. BRITISH THOMSON-HOUSTON CO., Ltd. July 26, 1948 [July 26, 1947], No. 19934/48. Class 38 (iv). The load circuit of a high-frequency heating system is maintained at resonance by periodical de-tuning, and measurement of the phase and magnitude of the resulting variation in input current by means of a discriminator which controls a reversible motor driving a variable capacitance to restore the circuit to resonance. The inductance of the secondary of the transformer 3, Fig. 1, coupling the oscillator 2 to the load 4, is periodically varied by a synchronous motor 11 rotating a shorted coil 10 coupled to said secondary winding. These tuning excursions cause a periodic variation in the current supplied to the oscillator from the rectifier 8 and hence an attenuating voltage across resistor 13, which voltage after amplification at 14 is applied to the grids of valves 20, 21, Fig. 2, of a discriminator 16. The valves are normally biassed to cut off by a battery 25, and anode/ cathode voltages of opposite phase are supplied from a reference source by a transformer 22. The stator of the synchronous motor 11 is adjusted so that the voltage appearing across resistor 13 when the load circuit is tuned on the low capacitance side of resonance is in phase with the anode voltage of valve 20. Hence under these conditions valve 20 conducts and the right-hand end of potentiometer 29 becomes positive. Conversely it becomes negative if the load circuit is tuned to the high capacity side of resonance. According to this polarity, either valve 32 or valve 33 conducts to control valve 34 or 35, respectively. These in turn control thyratrons 51, 52 by saturable reactors 54, 56 in phase shifting bridges. Hence the polarity and magnitude of the armature current of a reversible motor 19 is controlled. Motor 19 drives a variable capacitance 7, Fig. 1, to correct the tuning.
Patent GB-278139-A (GB)
Title: Improvements in means for fastening rubber pads to the covers of gas purifiers and other apparatus
IPC: C10K1/22
Filed: 1926-08-12
Abstract: 278,139. Milbourne, R. J., and Beard, G., F. H. Aug. 12, 1926. Joint - making packing.- Covers for gas purifiers and the like having metallic strips of angle section for holding a packing strip are constructed with an inner endless clamping strip. The inner strip is secured by spot welding and the outer set by spot welding or by bolts. The cover c has a flange d to which is welded a continuous endless angle strip h whilst a series of outer strips g are secured by bolts i. A packing strip e is held by the strips g, h and contacts with the flange b of the purifier a. For ease in assembly and removal of the strip e, one of each pair of bolts i is removed and the outer strips each swung aside on the remaining bolt.
Patent GB-575426-A (GB)
Title: Torque measuring wrenches
IPC: B25B23/142
Filed: 1943-12-02
Abstract: 575,426. Wrenches. LIVERMONT, F. W. Dec. 2, 1943, No. 20156. Convention date, Dec. 12, 1942. [Class 61 (iii)] A wrench which indicates with an audible click of a snap action spring when a predetermined torque is reached comprises a jaw 10 pivoted to the handle 11, a bar spring 19 carried by a block 20 and bearing at the other end on an extension 13 of the jaw a snap action blade spring 23 anchored at the ends between a projection 29 which may be adjustable and an adjustable pin 30 in the handle block 20 and an indicator pin 24 carried by a spring bearing on the snap action spring 23 and adapted to be projected with a click through a hole 36 in the handle ; the snap action spring bears on a fulcrum 34 and during the action of the wrench on an adjustable fulcrum pin 35 which at the moment the predetermined torque is reached causes the flexure of the spring 23 shown in full lines to snap suddenly into the dotted line position. In a modification the indicator pin is mounted directly on the snap spring but in a further modification, Fig. 6, the spring 23b carrying the indicator pin 36b has a dished portion 42 engaging the adjustable fulcrum pin 35b to produce the snap action and the point of contact between the end of the bar spring 19b and extension 13b of the pivoted jaw is adjustable by means of a movable interposed ball 46 on the end of a rod 47 movable by a nut 49.
Patent GB-761180-A (GB)
Title: Method of manufacturing the screen structure of cathode ray tubes
IPC: H01J9/227
Filed: 1954-07-09
Abstract: 761,180. Colour television tube screens. PHILCO CORPORATION. July 9, 1954 [July 10, 1953], No. 20159/54. Drawings to Specification. Class 39(1). The indexing strips of a colour television tube are applied to the conductive layer of the screen by first depositing thereon a film of organic material and subsequently heating to vaporize it. Two methods are described. In the first the colour fluorescent strips are applied to the glass substrata preferably by a photographic method as described in Specification 713,908 an organic film e.g. of nitrocellulose, plasticizer, octyl acetate, water soluble alcohol and a volatile ester, is allowed to spread over it and when sufficiently tacky the conductive film is formed thereon by evaporation e.g. by heating a thin aluminium filament or by sputtering. A film of organic lacquer is sprayed or flowed onto the conductive film, applying as little pressure as possible. The material is the same as for the previous lacquer step but with more plasticizer and no alcohol. The plasticizer may be di-2- ethyl butyrate-triethylene glycol and iso-amyl acetate. The indexing strips are deposited by the same photographic method as for the phosphor strips using the same mask and exposing through the overlying phosphor and conductive films with a sufficiently intense illumination. The assembly is finally dried and baked to remove the organic materials. In the second method, a binder is applied with the phosphor materials and there is an intermediate baking step, i.e. after depositing the aluminium and before applying the second organic film, which may therefore be of low viscosity. The indexing strip may be of material with a high secondary emission e.g. the oxide of magnesium, barium, strontium or calcium or magnesium orthosilicate ; or of a luminescent material. Specifications 732,565 and 753,442 also are referred to.
Patent GB-1103856-A (GB)
Title: Process for the colouration of polypropylene fibres
Inventor: JIROU MARCEL GEORGES
IPC: D06P3/79
Filed: 1965-05-13
Abstract: Nickel modified polypropylene is dyed using dyes of the general formula <FORM:1103856/D1-D2/1> wherein X is hydrogen a methyl group and the benzene ring A may be substituted by at least one non-water solubilising group, e.g. a halogen atom, or a methyl, alkoxy, nitro or cyano group.
Patent GB-936880-A (GB)
Title: Improvements in the lubrication of synthetic filaments
Inventor: SMITH JOHN ASHLEY
IPC: D06M15/643
Filed: 1961-06-06
Abstract: Filaments made from stereoregular hydrocarbon polymers or copolymers, polyamides or polyesters or copolyesters are lubricated by the application thereto of an emulsion or solution of a silicone oil having a viscosity between 1,000 and 200,000 centistokes at 25 DEG C. Aqueous emulsions containing 5-60% by weight of the silicone oil may be used, up to 3% by weight of an emulsifying agent, e.g. a polyalkylene oxide derivative, preferably being added to assist in the preparation of the emulsion.  Alternatively the silicone oil may be applied as a solution in a solvent which does not swell or dissolve the filaments.  The emulsion or solution may be applied to the filaments by passing them over a wheel rotating in a trough of the emulsion or solution, by spraying or by immersing the filaments in a bath of the emulsion or solution.  The filaments may subsequently be formed into plied or braided structures, e.g. cords and ropes.
Patent GB-297671-A (GB)
IPC: F17B1/14
Filed: 1928-07-13
Abstract: 297,671. Lechler, P., (trading as Lechler, P., [Firm of]). Sept. 24, 1927, [Convention date]. Joint-making packing.-In the storage of gases in water-sealed containers, e.g. gasometers, contamination with the vapour of the seal liquid is prevented by coating the liquid with a solution of a solid bitumen, ozokerite, paraffin, &c., in a mineral oil. Specification 244,089, [Class 54, Gas distribution], is referred to.
Patent GB-983319-A (GB)
Title: Railway rail anchorage
IPC: E01B9/28
Filed: 1962-05-28
Abstract: 983,319. Securing railway rails. H. MEIER. May 28, 1962 [May 27, 1961], No. 20459/62. Heading E1G. A rail anchorage comprises a steel bearing plate 2 adhesively secured in a concrete sleeper 1 and having ribs 8 and 9 against which bear the rail base 3 and the end 10 of a clamping member 17 respectively. The other end 18 of the clamping member engages the rail base 3. The member 17 is pressed downwardly by screwing a nut 15 on a bolt 12 adhesively secured in the sleeper and passing through the plate 2 and member 17. In an alternative embodiment (not shown) the rib 8 is omitted and the clamping member has a rounded nose engaging over the rail base.
Patent GB-378620-A (GB)
Title: Improvements in or connected with self-contained base range-finders or height measurers
IPC: G01C3/10
Filed: 1931-07-18
Abstract: 378,620. Range-finders. BARR & STROUD, Ltd. and STRANG, J. M., Caxton Street, Anniesland, Glasgow. July 18, 1931, No. 20586. [Class 97 (i).] Relates to singleobserver rangefinders for measuring height or horizontal range directly by relative displacement of the images produced, for example, by the translation of a refracting prism along the path of one of the beams of light, and the rotation of the prism in accordance with the angle of sight of the target. According to the invention, correct halving adjustment between the two telescopes is maintained in all positions of the measuring prism by imparting a compensating halving movement which affects the images only in the halving direction. In Fig. 1 the compensator consists of a parallel plate D of glass mounted on a pivot 3 about which it can be turned by a lever 4. The outer end of this lever is connected to a rod 5 which is displaced longitudinally in accordance with the longitudinal movements of the measuring prism P, and the fulcrum 6 of the lever is carried by a slidable arm 8 adapted to be moved along the length of the lever by a scroll shaft 7 which is rotated in accordance with the rotary movement of the prism. Hand-operated means may be provided for applying additional halving correction for effecting the ordinary halving adjustment of the range-finder, such means comprising for example a screw 9, Fig. 2, the rotation of which is adapted to move the axis 3 along the optical axis of the telescope. To reduce the astigmatism resulting from the tilting of the plate D, the plate may be made with spherical surfaces, one surface being convex and the other concave. The plate may be replaced by a refracting prism which can be either tilted about a pivot or moved along the axis of the telescope. In another form of the invention the compensation is obtained by rotating the whole frame A carrying the objectives and eyepiece prisms. In a further form one or both of the end reflectors is tilted through an angle depending on the rotational and translational movements of the measuring prism. Specification 125,587, [Class 97 (i), Optical systems &c.], is referred to.
Patent GB-1368340-A (GB)
Title: Earth boring bit
IPC: E21B10/22
Filed: 1972-05-03
Abstract: 1368340 Boring earth &c DRESSER INDUSTRIES Inc- 3 May 1972 [21 May 1971] 20603/72 Heading E1F In a bit having a cutter 42 mounted on a two diameter pin 38, bearings 44, 46 and thrust elements 54, 48 are interposed between the pin and the cutter. The element 54 may be formed by part circular pieces and has wear resistant or anti-galling characteristics.
Patent GB-1254768-A (GB)
Title: Production of ureidomethylphophonium salts
IPC: C07F9/6506
Filed: 1969-04-23
Abstract: 1,254,768. Ureido methyl phosphonium salts. BADISCHE ANILIN- & SODA-FABRIK A.G. 23 April, 1969 [24 April, 1968], No. 20648/69. Heading C2C.  Compounds of formula where R<SP>1</SP>, R<SP>2</SP>,and R<SP>3</SP> are the same or different and are aliphatic, cycloaliphatic, araliphatic or aromatic radicals, hydrogen or -CH 2 OR<SP>5</SP>, where R<SP>5</SP> is H or aliphatic, or R<SP>2</SP> and R<SP>3</SP> together with the ureido group form a heterocyclic ring, or R<SP>1</SP>, R<SP>2</SP> and/or R<SP>3</SP> are R<SP>4</SP> is alkyl, cycloaliphatic, araliphatic or aromatic, X is O or S, Y is an anion and n is 1 to 4, are prepared by reacting an appropriate N- methylolurea or N-alkoxymethylurea, or a mixture of formaldehyde and a urea, with a tertiary phosphine PR<SP>4</SP> 3  in the present of at least an equivalent amount of acid. The reaction is preferably carried out in the presence of a solvent at 40 to 80 C. The products are useful as flame proofing agents and chemical reagents.
Patent GB-871601-A (GB)
Title: Winding apparatus
Inventor: BRADLEY DONALD GORDON
IPC: D04B35/00
Filed: 1958-06-27
Abstract: 871,601. Winding transfer-tails. IMPERIAL 1959 [June 27, 1958; May 15, 1959], Nos. 20668/58 In apparatus for winding via a traverse-mechanism, a transfer tail is provided by an entrainment device positioned between the limit of the traverse mechanism and a temporary collecting- means and consisting of a peg which forms an integral part of a rubber band encircling the bobbin and which projects radially of the bobbin. A form for use in draw-twisting yarns of polyethylene terephtha- CHEMICAL INDUSTRIES Ltd. Aug. 12, and 16717/59. Class 120(2) late or polyamides which pass over delivery rolls to a heating zone, over draw rolls to collecting- means 4 taking the form of a suction gun such as is described in Specification 643,625 or 861,140 comprises a bobbin 1, a ring-traveller 2, 3, and a band 6 with a peg 5, a second peg being provided whereby the band may be pulled over the tail to prevent it unwinding.
Patent GB-878604-A (GB)
Title: Improvements in air filters
IPC: F02M35/024
Filed: 1960-06-13
Abstract: 878,604. Air cleaners. ATLAS COPCO A.B. June 13, 1960 [June 16, 1959], No. 20679/60. Class 8(2). An air filter suitable for use with a compressor or an I.C. engine comprises at least two oil-coated cartridges 26, 27, Fig. 3, located in series between the air inlet and outlet 8, 13 of a cylindrical housing 1 and separated by a fine mesh screen 18 capable of being quickly clogged with dust not having been retained by cartridge 26 when in its fully loaded condition ; the clogged screen then serving to reduce the air flow to such an extent as to render obvious to the operator the need to clean or renew the filter. The cartridges are of horse hair or metal wool. In a modification cartridges 16, 17, Fig. 1, each comprise superimposed perforated metal plates 19 having downwardly projecting spacing tongues offset with respect to those of adjacent plates.
Patent GB-189493-A (GB)
Title: Sheet glass drawing machine
IPC: C03B15/18
Filed: 1921-08-03
Abstract: 189,493. Marks, E. C. R., (Libbey-Owens Sheet Glass Co.). Aug. 3, 1921. Drawing. - Apparatus for drawing glass in flat sheets comprises a pot having oppositely-disposed overflow lips, an endless series of slotted tubular sections adjacent to each overflow lip, and means for moving each series vertically past the adjacent lip, the metal flowing over the lips being received by the sections to overcome the narrowing tendency of the sheet and to assist in the drawing. The body of metal 5, Fig. 1, from which the sheet is drawn is contained in a pot 2 provided on opposite sides with channelled lips 4 over which the metal can flow. Mounted on each side of the pot are upright frameworks 15 carrying endless chains 18 the links of which travel upwards close to the lips 4. The frames 15 are mounted on wheeled trucks 9 which may be moved to and from the pot, and one of them carries a motor 19 which drives a shaft 20 that transmits the drive to the chains. Each chain 18, as shown in sectional plan in Fig. 4, has hinged to it the halves 27a, 27b of short tubular sections 27. These members are so arranged that on the vertical runs of the chains they are placed end to end, thus forming a continuous member having a longitudinal channel 29 which is narrower at the end 30 that runs close against the lip 4. Guide rollers 34 on the sections run in channels 35 in the frame 15, these channels 35 being so arranged as to guide the sections and keep them closed in the vertical runs, and to open them when they turn over the upper sprocket wheels 16. In operation, the draw is started by a bait in the usual way. As the draw proceeds, the metal flows over the lip into the channels 29 of the sections 27, suction being applied to apertures in the sections to facilitate the inflow of metal. The thickened edges of the sheets which form in the channels draw the sheet and overcome its tendency to narrow. The frames 15 may be tilted by means of screws 50 to allow for the contraction of the sheet as it cools.
Patent GB-478965-A (GB)
Title: A manufacture of artificial materials from polyvinyl chloride
IPC: C08J3/18
Filed: 1936-07-27
Abstract: Softening-agents are blended with polyvinyl chloride by working under mechanical pressure while the temperature is raised to about 130 DEG C.  Suitable softening-agents include esters of phosphoric, phthalic, benzoic and adipic acids.  The products may be used for sheathing and insulating conductors of electricity, as rubber, celluloid substitutes, as artificial leather and oilcloth, and in the form of films or sheets for wrapping or coating.  In examples, polyvinyl chloride is blended with tricresyl phosphate by calendering at 130 or 135 DEG  C.
Patent GB-502961-A (GB)
Title: Improvements in the manufacture and production of carbon compounds poor in hydrogen
IPC: B01J21/16
Filed: 1937-07-27
Abstract: 502,961. Dehydrogenated hydrocarbons. JOHNSON, G. W. (I. G. Farbenindustrie Akt.-Ges.) July 27, 1937, No. 20768. [Class 1 (i)] [Also in Group IV] Benzines obtained by reduction of carbon monoxide are dehydrogenated and /or converted into aromatic hydrocarbons by treatment at 350-500‹ C. in presence of a catalyst comprising alumina with a smaller proportion of a sixth group metal or compound. In an example the catalyst consists of 3 parts of alumina and one part of molybdenum trioxide, and the reaction temperature is 460‹ C The product has an octane number of 60 and contains 35 per cent of aromatic hydrocarbons. Specifications 441,384, 483,189 and 485,178 are referred to.
Patent GB-1022351-A (GB)
Title: Improvements relating to transistor circuits
Inventor: BRAY DEREK
IPC: H03F1/34
Filed: 1961-06-09
Abstract: 1,022,351. Transistor amplifying circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. May 31, 1962 [June 9, 1961], No. 20858/61. Heading H3T. A multistage negative feedback amplifier includes a transistor TR3 in common emitter arrangement, having its collector connected to the emitter of a second transistor TR2 connected in common base arrangement, with a capacitor C connected between the collector of transistor TR2 and a point of fixed potential or the base of transistor TR3 so as to provide a capacity to earth which is substantially unaffected by variations of the base collector capacitances of the two transistors. The capacitor provides an effective capacitance to earth which, together with the associated circuit impedances, determines the high frequency cut-off of the amplifier. The output stages comprise emitter follower stages TR4-TR6 with negative feedback taken from resistor network 19-22 to give a low output impedance.