baber/WOPTO huggingface dataset:
Patent GB-841083-A (GB)
Title: Improvements in or relating to travelling wave tubes
IPC: C03B23/07
Filed: 1957-11-05
Abstract: 841,083. Travelling-wave tubes. M-O VALVE CO. Ltd., DIX, C. H., JENKINS, R. O., and RUSSELL, C. R. Nov. 19, 1958 [Nov. 5, 1957], No. 34487/57. Class 39(1). [Also in Group XXIII] In a travelling wave tube an electron gun and an elongated wire helix are accurately aligned by means of members which bear on accurately formed parts of the internal surface of the glass envelope. The relative portion of the envelope is formed by shrinking an oversize envelope on to a metal mandrel by locally heating the envelope and constraining the softened glass into contact with the mandrel, e.g. by reason of a difference in gas pressure between the inside and outside of the envelope. The metal mandrel has a higher coefficient of thermal expansion than the glass envelope so that   upon cooling, the mandrel may be easily withdrawn from the envelope. The local heating may be effected by means of a gas ring- burner which is moved slowly down the outside of the envelope from a closed end to the end at which the envelope has previously been evacuated, but prior to this the envelope and mandrel may be together heated to a temperature just below the temperature at which the glass softens to relieve stresses in the envelope. As shown, the helix is supported by means of tantalum members 21, 22, spaced apart by 3 ceramic rods 23. In the region of molybdenum clip 24 the rods 23 are coated with a graphite composition to prevent unwanted oscillations during operation of the tube. The electron gun is of the kind described in Specification 841,083 and includes 3 titanium discs 25 spaced apart by 3 ceramic rods 26 which bear on the internal surface of the envelope. Electrode leads 29 are sealed through a glass disc 31 formed integrally with the pumping stem 32. The collector electrode comprises a copper block 7 secured to a molybdenum sleeve 33 and connected to the glass envelope by means of a sleeve 20 of nickel iron cobalt alloy. The external surface of the glass envelope may be accurately ground so as to have a prescribed spatial relationship with respect to the internal surface so that a magnetic focussing coil may be mounted thereon, accurate locating being achieved with the aid of a groove formed in sleeve 20.
Patent GB-969115-A (GB)
Title: Improved process for preparing inter-polymer latexes
IPC: C08F220/06
Filed: 1962-09-10
Abstract: In the manufacture of an interpolymer latex by emulsion polymerization of a monoethylenically unsaturated acid, a monoalkenyl aromatic monomer having an aromatic nucleus containing from 6 to 10 carbon atoms and an open-chain aliphatic conjugated diene of from 4 to 9 carbon atoms in an aqueous medium which contains non-polymerizable constituents such as catalysts or emulsifiers, at least a part of the unsaturated acid is dispersed in the aqueous medium with agitation at helow 30 DEG C. which temperature is maintained while a first portion comprising from 10 to 20% of the total diene and alkenyl aromatic monomers is introduced and dispersed therein, the temperature raised to polymerize and the remaining portions of the monomers are added, the monomers being employed in a preparation to provide from 1-10% of unsaturated acid, 36 to 47% diene and the remainder the alkenyl aromatic monomer.  A chain transfer agent e.g. carbon tetrachloride may also be present. Specified unsaturated acids are acrylic, itaconic and fumaric acids while butadiene and styrene are preferred comonomers. A portion of the acidic monomer may be added to the dispersion after the final portion of diene and alkenyl aromatic monomers, or the total of the acidic monomer may be added before the addition of the first portion of either diene or alkenyl aromatic monomer. Additional emulsifier may be added after the addition of the final portions of monomer.
Patent GB-605589-A (GB)
Title: Method and apparatus for applying high frequency electric currents to thermodynamic chemical reactions
IPC: H05B1/02
Filed: 1945-12-20
Abstract: 605,589. Heating fluids by dielectric and induction heating. LORD, H. C., LORD, T., and HARTMAN, B. M., (trading as L. L. H. CO.). Dec. 20, 1945, No. 34529. Convention date, Dec. 22, 1944. [Class 39(iii)] Fluid from a pipe 18 is regulated by a valve 16 controlling the flow into a venturi tube 19 from which the fluid passes into a tube 20 of ceramic or like material surrounded by two annular electrodes 30 connected to a source of H.F. power. A pump 21 creates a region of low pressure in the tube 20, and continuously withdraws the heated fluid to a condenser or other container. An alternative arrangement shown in Fig. 2 includes an inductive circuit 31 coupling the electrodes 30 to the H.F. power circuit which inductive circuit also surrounds the tube 20. Various other arrangements of electrodes within the tube 20 are described.
Patent GB-1483305-A (GB)
Title: Process for electrolytic treatment of tinplated steel sheet
IPC: C25D11/38
Filed: 1975-08-20
Abstract: 1483305 Electrolytic treatment of tinplate NIPPON KOKAN K K 20 Aug 1975 [10 Sept 1974] 34560/75 Heading C7B  Tin plated steel is cathodically treated in an alkaline bath at pH 10 or less. The treatment reduces liability to oxidation and sulphur staining of the tinplate with reduced liability to anode corrosion during the treatment. A bath of NaHCO 3  with optionally Na 2 CO 3  may be used. Other alkaline components are listed. A subseouent cathodic step in a Cr (VI) bath e.g. Na 2 Cr 2 O 7  optionally containing a mono - or dibasic carboxylic acid e.g. succinic may be applied possibly preceded by a dip in acetic acid. Conventional anodes e.g. Pb, Pb-Ag or stainless steel are referred to.
Patent GB-603279-A (GB)
Title: Improved manufacture of glass welded articles by electric heating
IPC: C03B23/24
Filed: 1945-12-20
Abstract: 603,279. Seaming non-metallic sheet materials. CORNING GLASS WORKS, Dec. 20, 1945, No. 34587. Convention date, March 6. [Class 42(i)] [Also in Groups XI and XXIII] Glass is heated by applying segments 74 of volatilisable conductive material at closely spaced intervals along the path to be heated, applying electrodes to the end segments so that current passes along the path and sparks are formed between the segments, which burn away when the glass is heated and become conductive, current then passing through the glass. In welding together two glass parts, a glass rod 73 with the segments 74 is placed en adjoining edges of the glass parts and current is passed to melt the glass rod which flows into contact with the parts. In making a glass tank, two side walls 53, 54 are supported on vacuum chucks, 13, 14 with vacuum valves 16, 17, the chucks being pivoted at 18, 19 and supported by adjustable arms 20, 21, on a pillar 12. A coated glass rod 84 is placed between the upper edges of the plates and is heated by passage of current so as to fuse into the walls, which may be preliminarily heated by lowering over them a furnace 27 which may be electric. Two more walls are similarly joined, the weight of the tank being partly supported by a weighted lever 25 pivoted on the base 11. The wall structure is then supported on inclined rails 32 by a transverse rail 34 on a frame 30. The base 60 of the tank is supported by a platen 36 on post 37 on a plate 38 adjustably supported by screws 39 on brackets on'the rails 32, and the lower edge of the base 60 is engaged by stops 43 adjustable on brackets 35 on the rails 32. A glass rod 61 with segmented coating is placed in the groove between the base 60 and the wall 53 and is heated to fuse the base 60 and wall together. The other edges of the base are in turn similarly joined to the walls. Bevelled glass edges are joined by placing a coated glass rod in the adjacent edges and fusing the rod. The glass rod may have. a melting point lower than that of the parts to be joined. Specifications 566,629 and 570,747 [both in Group XXIII], are referred to.
Patent GB-1171019-A (GB)
Title: Improvements relating to Guided Missile Directors.
Inventor: HARDY DEREK JAMES
IPC: F41G1/40
Filed: 1967-07-27
Abstract: 1,171,019. Missile directing system. BRITISH HOVERCRAFT CORP. Ltd. 18 July, 1968 [27 July, 1967], No. 34665/67. Heading F3C. A missile directing system is combined with a guided missile carried by and launched from a vehicle, the system comprising a sight 25 through which the aimer views a target and the guided missile during its flight to the target and a support for the aimer. The support and sight 25 form a unitary structure to substantially eliminate relative movement between the eyes of the aimer and the eyepiece of the sight and the support comprises a shock-absorbing means. The directing system may be on the same vehicle as the guided missile and the vehicle may be operated on land, water or be amphibious, e.g. an air cushion vehicle. The support comprises a seat 19 mounted on a platform 18 by a spring device consisting of struts 20 and a torsion spring (not shown), the platform being connected to the sight through members 22, the upper parts of which are interconnected by three damped suspension units 21. The suspension units 21 are also connected to an inner ring 14 which is rotatably mounted in an outer ring 12. The platform is supported from the inner ring by struts 17.
Patent GB-1175508-A (GB)
Title: Improvements in and relating to Pneumatic Tyres
IPC: B29D30/54
Filed: 1968-07-19
Abstract: 1,175,508. Retreading tyres. MICHELIN & CIE (COMPAGNIE GENERALE DES ETABS. MICHELIN). 19 July, 1968 [20 July, 1967], No. 34669/68. Heading B7C. Bands of unvulcanized tread material 7, 8, 9 are applied, with gaps 10, 11 between to a prepared tyre carcase and rolled down under mechanically applied pressure, transverse grooves 12 being cut in the bands before vulcanizing in an autoclave. The gaps and grooves may be straight or curved, and may vary in width. The grooves, the depth of which may be ¥ the thickness of the bands, may be cut prior to the application thereof. Infiltration of vapour into the crevices of the tyre during vulcanization is prevented by the application of a protecting strip by the same process.
Patent GB-448619-A (GB)
Title: Improvements in or relating to means for utilising harmonics in electric transformers
IPC: H01F38/02
Filed: 1934-12-05
Abstract: 448,619. Converting. ENGLISH ELECTRIC CO., Ltd., 28, Kingsway, London, and AYRES, W. E. M., Siemens Works, Stafford. Dec. 5, 1934, No. 34947. [Class 38 (ii)] An arrangement for obtaining energy at m times the supply frequency from an n-phase supply comprises means for converting the n-phase supply to m-phase to supply m-star connected primary windings having secondaries windings connected to form a symmetrical polygon from which the harmonic supply is obtained. An arrangement for obtaining a 5th harmonic supply is shown in the drawing and comprises a transformer 1 for obtaining a 5-phase supply to which is connected the star connected primary of a transformer 2 having its secondary 2b connected in open delta. With a single phase supply phase splitting means may bo used. Specifications 2060/15, [Class 38 (ii)], and 15729/13, [Class 1 (i)], are referred to.
Patent GB-758904-A (GB)
Title: A new or improved latching device
IPC: E05B65/19
Filed: 1954-12-03
Abstract: 758,904. Latches. HUMBER, Ltd., and WILLIAMS, D. V. Dec. 3, 1954, No. 35045/64. Class 44. A releasable latching device for holding together two parts which are relatively movable in a straight or curved path, comprises a latch member 13 attached to one of the parts and a hook 21 secured to the other part for rotation thereon between limiting positions in one of which, the hook, which is offset from the axis of rotation 19 faces towards the first part for reception or release of the latch member 13 and in the other position the hook 21 faces transverselv to the direction of relative movement of the parts and lies effectively in an aligned or dead-centre position in respect of the direction of relative movement of the parts on the side of the axis of rotation opposite to the first mentioned part and by reason of such alignment is operable to retain the latch member, the latch member and the axis of rotation of the hook being relatively movable in a direction transverse to the direction of relative movement between the parts so that by a combination of the two movements, the latch member may follow the rotation of the hook and remain therein as the hook rotates between latched and unlatched positions. As shown, a hood structure 10 of a motor vehicle is pivoted to the body at 11 to extend upwardly and forwardly to the top of a door frame and carries the spring- loaded latch member 13 provided with a roller 14 which is adapted to engage the hook 21 pivotally attached to a door frame 20. The hook may be moved clockwise from the position shown to an unlatched position or vice versa, by a handle 22. The hook may be retained in either position by a spring 24. In operation, the latch member may be engaged with the hook when the latter is in the latched or unlatched positions by moving the hood 10 to the erected position shown. If the hook is left in the un. latched position, this movement may be assisted by rotation of the handle 22.
Patent GB-1347367-A (GB)
Title: Aqueous dispersions of film-forming macromolecules
IPC: C09J151/00
Filed: 1971-07-27
Abstract: 1347367 Graft polymer dispersions LUBRIZOL CORP 27 July 1971 [10 Aug 1970] 35218/71 Heading C3G In an aqueous dispersion of film-forming macromolecules, at least a portion of said macromolecules has grafted thereon one or more amide units derived from a monomer of formula wherein R 1 , R 2 , R 3 , R 4  and R 5  are each independently selected from hydrogen, hydrocarbon radicals and substituted hydrocarbon radicals; R 6  is selected from hydrogen halo and C 1  to C 10 - alkyl radicals and Z is The dispersion may be prepared by mixing a polymer, preferably a polymer of vinyl acetate, an alkyl acrylate or an alkyl methacrylate, with a monomer of the said formula and carrying out the polymerization in an aqueous medium. Alternatively the polymerization is carried out in bulk or in an organic solvent and the graft polymer produced is dispersed in an aqueous medium. In the examples, (a) polyvinyl acetate latex is heated in the presence of t-butyl hydroperoxide before or while being contacted with (i) diacetone acrylamide or (ii) hydroxy methylated diacetone acrylamide, the resulting graft polymer being blended with additional polyvinyl acetate latex; (b) vinyl acetate/nbutyl acrylate copolymer latex is heated in an aqueous medium containing said hydroperoxide and then grafted with monomer (ii), or is heated in a similar aqueous medium containing monomer (i); (c) vinylacetate/di-n-butyl maleate copolymer latex is heated with said peroxide and then grafted with monomer (ii); (d) a vinyl acetate (vinyl ester of C 9 -C 11 -alkanoic carboxylic acids copolymer latex is heated with monomer (i) and said hydroperoxide; (e) vinyl acetate/ethylene copolymer latex is heated with said hydroperoxide while being contacted with monomer (i) or prior to being contacted with monomer (ii); (f) ethyl acrylate (methyl methacrylate copolymer latex as in (e); and (g) butadiene-styrene copolymer latex is grafted with monomer (i) using said hydroperoxide as initiator. The graft polymers are incorporated in compositions comprising (1) polyvinyl acetate grafted with monomer (ii) or vinyl acetate/nbutyl acrylate copolymer grafted with monomer (ii), and a pigment slip containing red iron oxide, talc and barytes; (2) vinyl acetate polymer grafted with monomer (i), ammonium caseinate, rosin ester resin, phenol-formaldehyde resin and styrenated phenol; (3) butadiene-styrene copolymer grafted with monomer (i), ammonium caseinate, phenolformaldehyde resin, styrenated phenol, sulphur, zinc oxide and zinc N,N- dibutyldithiocarbamate; (4) vinyl acetate polymer grafted with monomer (i), tetrasodium pyrophosphate, cornstarch, clay, styrenated phenol and optionally, titanium dioxide.
Patent GB-736770-A (GB)
Title: Multi-cylinder two-stroke cycle internal combustion engine
Inventor: HANSEN KAJ EDVARD
IPC: F02D17/00
Filed: 1953-12-18
Abstract: 736,770. Regulating; charge pumps. AKTIESELSKABET BURMEISTER & WAIN'S MASKIN-OG SKIBSBYGGERI. Dec. 18, 1953, No. 35354/53. Classes 7(2) and 7(6). Turbines 1 fed by exhaust from individual cylinder groups of a two-stroke engine and driving compressors 14 supplying charge air to separate induction manifolds or a common manifold, may each be isolated whilst the engine is running by putting the cylinders of its group out of action by lifting fuel injection pump roller guides from their cams, cutting an intake passage 15 off from a scavenging air box 16 by sliding a valve plate 23 upon temporarily loosening a flange 22 and blocking exhaust passages 3 by removing push rods 11 from engagement with rockers 12 to allow exhaust valves 6 to close. The rods 11 may be removed singly or, by disconnecting their sleeve support 20 from the engine, together. In an engine having an auxiliary piston controlling exhaust ports, the exhaust passages are blocked by closing a gate valve in the common portion of the exhaust manifold. Starting air may be supplied to cylinders whilst out of action.
Patent GB-462859-A (GB)
Title: Improvements in or relating to vehicles for refuse and other materials
IPC: B65F3/20
Filed: 1935-12-20
Abstract: 462,859. Scavengers' vehicles; loading. HYGIENIC REFUSE CONTAINERS, Ltd., and BILAND, A. J. Dec. 20, 1935, No.. 35385. [Class 108 (i)]' [Also in Group XXX] In vehicles designed for refuse and other loose material wherein the refuse &c. is pushed into the body by means of a power-actuated piston or the like, the floor from which the piston pushes the refuse &c. is movable with the refuse &c. in order to eliminate the frictional resistance between the refuse and the floor which hitherto has had to be overcome by the piston &c. The Figure shows a vehicle in which the piston 2 pushes into the body 9 the refuse &c. loaded on to the movable floor 4, comprising a band 5 and rollers 6, through hopper door 7. In a modification, a vehicle is provided with loading means at the front and with a horizontal movable floor. In addition, if desired, the floor of the main body 9 may be movable and the movable floor 4 may be arranged to coact with the piston on its inward movement and held stationary on its outward movement. Specification 446,006 is referred to.
Patent GB-797487-A (GB)
Title: Improvements in methods of and apparatus for heating cement raw material or the like
IPC: F27B7/20
Filed: 1956-11-20
Abstract: 797,487. Preheating furnace charges. SMIDTH & CO. AKTIESELSKAB F. L. Nov. 20, 1956 [Nov. 29, 1955], No. 35477/56. Class 51 (2). Cement raw materials, lime or ore to be burnt or sintered in a rotary kiln is preheated by the passage of gases from the kiln downwardly through a bed of the material on a gas-permeable support, the fresh material forming a lower layer of the bed and material through which the gases have already passed forming an upper layer, part of the bed, including some at least of the upper layer being fed into the kiln and the remainder being wholly or partly used to form the upper layer. Hot gases from a rotary kiln 1, Fig. 1, pass downwardly through material on a chain grate 5. Fresh raw material from a hopper 10 forms a bottom layer on the grate and a second hopper 11 feeds material to form an upper layer. A horizontal blade 12 extending the whole width of the grate divides the bed into an upper part which passes to the kiln 1 and a lower part which drops through a hopper 30 to an elevator 13 and conveyed to the hopper 11. Fine particles which pass through the grate 5 and fine particles removed in the hopper 30 are delivered to the kiln by a conveyer 31. The inclination of the blade 12 is made adjustable to vary the amount of material returned. Raw material and fine particles returned from below the chain grate may be passed to a nodulizing drum feeding the lower layer to the grate. Fine particles screened from the partly heated material being fed to form the upper layer are also returned to the nodulizing drum. The raw material may be in the form of slurry, which may be passed over a vacuum filter before feeding it to the nodulizer. In a modification, Fig. 4, an inclined grate 22 with alternate bars reciprocated passes the bed of the material from the hoppers 10, 11 to kiln 1. Fines passing through the grate is fed to the kiln 1 together with the upper part of the bed. In another embodiment, Fig. 5, a plough-like device 29 divides the bed of material of the grate 5 vertically.
Patent GB-1249575-A (GB)
Title: Cultivator frame
Inventor: SPENCE DAVID MOUNTEFORT
IPC: A01B35/02
Filed: 1969-07-16
Abstract: 1,249,575. Cultivator frame. SPENCE & SONS Ltd. 10 July, 1970 [16 July, 1969], No. 35877/69. Heading A1B. A cultivator frame comprises two laterally extending first members 1, 2, three laterally extending second members 3, 4, 5, of smaller section than the first members, and a plurality of longitudinally extending members 6, 7, 8, 9 secured to the laterally extending members so as to make a rectangular framework. A towing attachment 10 enables the frame to be connected to a tractor three-point hitch. Tines may be secured to the laterally extending members.
Patent GB-1071466-A (GB)
Title: Improvements in or relating to plier-like retaining ring assembly tools
IPC: B25B27/20
Filed: 1964-08-14
Abstract: 1,071,466. Pliers. WALDES KOHINOOR Inc. Aug. 14, 1964 [Aug. 26, 1963; May 18, 1964], No. 35922/66. Divided out of 1,071,465. Heading B4W. [Also in Division F2] Pliers for applying a non-resiliently deformable retaining ring in a groove on a shaft or in a bore, comprise three jaws having arcuate surfaces, for engagement with a periphery of a retaining ring, the three jaws being supported on a pair of handles which are pivoted to each other. The pliers, Figs. 1 and 2 (not shown) comprise a pair of handles pivoted to a plate (36) having at its upper end an arcuate jaw (42) and a pair of arcuate jaws (44), (46) pivoted together at (48) and having extensions (50), (50<SP>1</SP>) to which the handles are pivoted at (56), (56<SP>1</SP>). Inserts for the jaws may be provided. In a modification, Figs. 3-5 (not shown), a plate (36) having a circular aperture (72) is coupled to the handles (32<SP>1</SP>), (34<SP>1</SP>) by the pivot (62), integral pins (64), (68) on the handles extending respectively into apertures (66), (70) in the plate. The handles carry jaws (44<SP>1</SP>), (46<SP>1</SP>) having arcuate recesses which co-operate with the aperture (72). The end faces (74), (76) of the jaws lie along a radius of the aperture (72). In another modification, Figs. 6-11 (Figs. 7-11, not shown), the handle 81 carries a head 84 in which a block 90 is slidably mounted, the block having a rack bar (96) provided with teeth (98) in meshing engagement with teeth on the head of the handle 82. The block 90 is mounted on jaw 102 having an elliptical opening providing an arcuate abutment surface (110). The jaw 102 is provided with two inclined tracks (112), (113) in which a pair of jaws 118 (123) are reciprocally mounted, all these jaws having grooved abutment surfaces. In another modification, Figs. 15-19 (Figs. 16-19, not shown), the jaws (144, 158, 166) have projections (146, 162, 170) provided with arcuate abutment surfaces adapted to engage the inner periphery of a ring and to enter the end of a tubular shaft to expand a ring placed in the bore. The L-shaped block 142 mounts a pair of parallel pins 184, 186 which are telescopically received in the stationary jaw structure 144. Movement of the block 142 causes the pins 184, 186 to move to the right and push the rails (160, 168) of the other jaws (158, 168) along the inclined tracks (150, 152) provided in the jaw structure 144, to cause the abutment surfaces of the jaws to apply pressure to the ring in an outward direction.