baber/WOPTO huggingface dataset:
Patent GB-998545-A (GB)
Title: A process for the production of high molecular weight polyoxymethylenes
IPC: C08G2/00
Filed: 1963-10-10
Abstract: A compound of divalent tin of general formula <FORM:0998545/C2/1> in which R is an N-substituted dithiocarbaminic acid radical, a xanthogenic acid radical, a carbonic acid semi-ester radical or an N-substituted carbamidic acid radical is used as a polymerization catalyst.  In examples: (A) the catalyst <FORM:0998545/C2/2> is prepared by dissolving SnCl2-2H2O in glycol monomethyl ether, distilling off the water and adding this dropwise to a solution of sodium in glycol monomethylether removing the sodium chloride and saturating the filltrate with CO2 to give a solution of tin-II-di-methoxyethyl carbonate which is then treated with toluene concentrated and cooled.  (B) The catalyst <FORM:0998545/C2/3> is prepared by treating the sodium compound of glycol monomethylether and dioxane with carbon disulphide and adding dropwise tin-II-salt of 2-ethyl caproic acid; (C) <FORM:0998545/C2/4> is prepared by adding tin-II-hydroxide in dioxane to n-butyl carbaminic acid chloride in benzene.  Similar preparations yield the catalysts <FORM:0998545/C2/5> and <FORM:0998545/C2/6>ALSO:Formaldehyde is polymerized at -20 DEG  to +120 DEG C. in the presence of a catalyst comprising a tin compound of formula <FORM:0998545/C3/1> where R is an N-substituted dithiocarbaminic acid radical, a xanthogenic acid radical, a carbonic acid semi-ester radical, or an N-substituted carbamidic radical.  The polymerization may be carried out in an alkylating agent or in an acylating agent or in the gaseous phase in the presence of high molecular weight polyoxymethylene present in the form of a fluidized bed. Specified catalysts are the tri salt of N : N-dibutyl - dithio - carbaminic acid, of N-methyl-N - stearyl - dithio - carbaminic acid, of N : N-diphenyl - dithiocarbaminic acid, of glycol monomethyl ether-dithiocarbonic acid, of monomethyl ether carbonic acid and tin N : N-dibutyl-carbamidate. The polymerization may take place in solution preferably in methylene chloride or ethyl ortho-formate and may be continuous or not.  The formaldehyde and the catalyst are added gradually into the polymerization medium.
Patent GB-1508580-A (GB)
Title: Structural element
IPC: E21D11/04
Filed: 1974-12-30
Abstract: 1508580 Building panels O A BECKER 30 Dec 1974 [31 Dec 1973] 40082/77 Divided out of 1508579 Addition to 1501880 Heading E1B [Also in Division B3] The structural elements of the Parent Specification are improved in that the pressure transmitting are cellular and are reinforced by hollow filling bodies 123 or 123', preferably in the form of square pipe sections. In addition the element may be reinforced by vertical 131 and horizontal 132 square pipes welded together and positioned at each outer face of the element and interconnected by bolts 140 passing hermetically through the several layers of the element. The cellular honeycombs are made up by parallel thin metal strips spaced apart either by short strips perpendicular thereto or by strips formed with right - angled corrugations. To aid in the arc - pressure welding the pressure transmitting means preferably taper to knife edges. Reference is made to Specifications 1218332 and 1366503. Parent Specification is a P. of addition to 1487342.
Patent GB-1076691-A (GB)
Title: Improvements in or relating to methods and apparatus for testing the surface roughness of a web
IPC: G01B5/28
Filed: 1962-10-23
Abstract: 1,076,691. Measuring surface roughness electrically; photo-electric thickness measuring. WIGGINS TEAPE RESEARCH & DEVELOPMENT Ltd. and J. G. GOFFEY. Jan.13, 1964 [Oct. 23, 1962], No.40147/62. Headings G1A, G1M and G1N] In a device for testing surface roughness of a paper web 12 moving over a drum 11, two rollers 15, 16 spaced in the direction of travel of the web, are biased on to the drum 11 and are carried on respective arms 18, 19 pivoted at 23, 24 and carrying between their upper ends a microswitch 32 sensitive to relative movement of the two arms. Thus the switch is not affected by overall changes in web thickness as both arms then move together; but, if a local variation in thickness affects one roller only, the switch closes and operates a marking device. The microswitch may be replaced by a differential transformer or a capacitor transducer. Alternatively a light source may be placed on one arm and a photo-electric cell on the other, so that movement of the one arm alters the amount of light passing through a fixed screen to the cell. The rollers may be applied to a web portion not actually on the roller, and several of these surface testing devices may be mounted side by side across the width of the web.
Patent GB-1200078-A (GB)
Title: A method of manufacturing a semiconductor device and a device obtained by this method
IPC: H01L23/29
Filed: 1967-09-01
Abstract: 1,200,078. Semi-conductor devices. HITACHI Ltd. 1 Sept., 1967 [12 Sept., 1966], No. 40169/67. Heading H1K. A semi-conductor substrate 1 coated with a passivating layer 4 (e.g. of SiO 2 ) is further coated with a layer 5 comprising an oxide of phosphorus, boron or lead by exposing the layer 4 to a material containing one of these elements and simultaneously heating it in an oxidizing atmosphere and is immediately thereafter coated with a further protective layer 6 (e.g. of SiO 2 ), this final coating step being performed without permitting the oxide layer 5 to be exposed to a moisture-containing atmosphere. In the preferred embodiment the surface of a diffused planar-type silicon NPN transistor is cleaned of any oxide masking layer and is thereafter provided with an oxide passivation layer 4 by the decomposition by heating in a reaction tube under reduced pressure of a gaseous organic silane (e.g. tetraethoxysilane). The surface of the oxide layer 4 is vitrified to produce layer 5 by the passage of gaseous POCI 3  in oxygen at an elevated temperature, the glass layer thus formed then being protected by a repetition of the process which results in the deposition of oxide film 4, these further two processes being carried out without interruption in the same reaction tube. As a result, any free phosphorus pentoxide remaining on the surface of the layer 5 cannot react with moisture in the atmosphere to produce a gel which degrades the properties of the semi-conductor device. The function of the vitreous layer 5 is to improve the sealing properties of the passivating layer 4 and to reduce migration of any metallic ions therein. Fig. 4 (not shown) shows the completed devices wherein holes are etched through the layers 4, 5 and 6 and aluminium contacts plated therethrough on to the base and emitter electrode areas. It is stated that in the case of a silicon substrate the layer 4 may be formed either by deposition or by oxidation of the substrate, that the substrate may be of germanium or an intermetallic semi-conductor compound and that the invention is applicable to mesa transistors, to diodes and integrated circuits. The layer 6 may be formed of Si 3 N 4 . Reference has been directed by the Comptroller to Specification 1,049,017.
Patent GB-1448666-A (GB)
Title: Window panel structures
IPC: E06B3/68
Filed: 1972-09-09
Abstract: 1448666 Window frames, glazing PERCY LANE GROUP Ltd 7 Dec 1973 [9 Sept 1972] 40809/72 Headings E1J and E1R A window panel structure comprises a frame with a mullion member 10, two window panels, and a locking member (42, Fig. 2) which has a central portion located in a slot 18 in member 10 and its ends pressing the panels against member 10. Each panel has a glass pane 34, a frame 26 and glazing beads 36 secured to frame 26 by screws 37. The member 10 has a plurality of slots, locking members being inserted by movement longitudinally of the member 10. Flanges 48 on the locking member have serrations 52 which engage ribs 54 on panel frames 26, the flanges 30 on the frames 26 being pressed via seal 40 against flanges 14 on member 10. A plastics cover (56) may be clipped over the locking members. The slot may be blind and the locking member inserted by movement laterally of the frame member.
Patent GB-875297-A (GB)
Title: Improved combination of a by-pass valve unit and a pump in a fluid flow system
Inventor: BASFORD KENNETH ARNOLD
IPC: F02C7/232
Filed: 1958-12-17
Abstract: 875,297. Valves. ROLLS-ROYCE Ltd. Dec. 4, 1959 [Dec. 17, 1958], No. 40815/58. Class 135. A by-pass valve unit 17, arranged in a bypass 16 of a pump 11, comprises two chambers 19, 20 connected by concentric passages 21, 22. A first valve member 23, provided with an aperture 23a, normally closes the outer annular passage 21 while a second valve member 25 closes the central passage 22. An excess pressure on the pump outlet side is by-passed to the inlet through passage 16b, chamber 20, annular passage 21, valve 23, chamber 19 and passage 16a while in the event of pump failure fluid can by-pass the pump through passage 16a, chamber 19, aperture 23a, central passage 22, valve 25, chamber 20 and passage 16b.
Patent GB-1024538-A (GB)
Title: Process for the continuous polymerisation of oligomers of formaldehyde
IPC: C08G2/00
Filed: 1964-10-08
Abstract: Formaldehyde polymers are catalytically polymerized or copolymerized continuously and in bulk by introducing the oligomer under conditions of complete expulsion of air into a tubular structure made of synthetic plastic material and continuously guiding the structure through a liquid bath or a heating channel kept at polymerization temperature.  The catalyst is preferably a cationic catalyst deposited on the inner side of the structure which may be of polyethylene or polypropylene.  The formaldehyde oligomer is preferably trioxane while chain transfer agents, stabilizers and fillers may be present during the polymerization. The structure may be passed through a cooling bath after polymerization.
Patent GB-925650-A (GB)
Title: Lifting device
IPC: E04G11/24
Filed: 1959-12-07
Abstract: 925,650. Jacks. E. J. VON HEIDENSTAM. Dec. 7, 1959, No. 41439/59. Class 78 (3). [Also in Group XXIV] A lifting jack comprises a threaded bar 2 on which are screwed two nuts 13, 11, which alternately support the load to be lifted, the nut 11 being moved along the bar by means of fluid pressure and at the same time winding up a spring 37 which then unwinds to move the nut 13 along the bar. In operation, hydraulic fluid is fed simultaneously via a pipe 19 (Fig. 1) into a cylinder 8 moving housing 5, 7 upwardly until the piston 9 abuts against the nut 11 and via a pipe 32 and valve 35 into a cylinder 20 moving its piston 21 to cause a pawl 24 to engage the upper ring of ratchet teeth 29 in a wheel 30 and turn the nut 13 until its locking ring 14 lies just beneath the lower housing 7. The supply of oil is then cut off in pipe 19 whereupon the housing parts 5 and 7 are lowered under the action of the load 1 until they are supported by the ring 14, and the top nut 11 is turned, under the action of springs 37, which were compressed between lugs 38 formed on the nuts 11, 13 during the previous rotation of the nut 13 until the piston 9 abuts the upper housing 5. The whole process is then repeated. The jack may be used for lifting the bar 2 relative to the load 1 by introducing fluid into a second cylinder lying directly below the cylinder 20. This second cylinder co-operates with another oppositely acting pawl-and-ratchet mechanism to move the lower nut 13 down the bar 2 and the springs 37 then turn the nut 11. In modifications (not shown), the jack is adapted to lift a load lying vertically below it or to be attached to a yoke connected to a sliding mould. In a further modification (Fig. 7), the upper and lower housing parts and the upper and lower nuts are identical and are interconnected by bellows 8a, and springs 55 replace the piston and cylinder 8, 9 and springs 37. A hand or electric pump may be used to supply pressure. The jack may be used for work in vertical, horizontal or oblique directions.
Patent GB-975096-A (GB)
Title: Process for producing sulfur from hydrogen sulfide
IPC: C01B17/05
Filed: 1961-11-21
Abstract: Hydrogen sulphide is converted to free sulphur by reaction with oxygen in a solution of an ammonium compound or an amine in the presence of a metal phthalocyanine catalyst. The hydrogen sulphide may be absorbed in the amine or ammonium solution which is reacted at a pH of 8-14 at 15-204 DEG  C. and at a pressure at which the ammonium or amine solution is in the liquid phase.  The catalyst may be a Co or V phthalocyanine carboxylate or sulphonate and may be a composite thereof with an adsorptive support, e.g. charcoal, SiO2, Al2O3, ZrO2, kieselguhr, bauxite or diatomaceous earth.
Patent GB-919956-A (GB)
Title: Improvements in or relating to fluid control valves
IPC: F16K3/02
Filed: 1961-11-21
Abstract: 919,956. Valves. DAUMY, G. F. A. Nov. 21, 1961 [Dec. 23, 1960; Aug. 31, 1961], No. 41682/61. Class 135. A valve is actuated by means comprising a tabular coil 5, Fig. 1, connected to the valve member 1 and opening out of a valve chamber 4 which is sealed against external leakage, this tubular coil being engaged by a spiral spring 9 movable internally through the coil, the spiral spring having one or more turns of different pitch from the coil turns so as to deform the coil or allow it to relax, and thereby move the valve member between closed and open positions. The spring is rotatable to engage or disengage the coil by a manually rotatable threaded spindle 10 connected to the spring. Tha inner end 7 of the coil 5 is sealed and the outer end 6 is welded to the sealed chamber 4. In a second embodiment, Fig. 4, coaxial inlet and outlet conduits 24, 25 pass through the sealed chamber 13 and are provided with respective ports 27, 28 opening into the chamber. The ports 28 are controlled by a sleeve valve member 29 connected to the tubular coil 14 which opens out of the chamber at opposite ends. This coil is engaged internally by a spiral spring 7 of which the opposite ends carry hand wheels 32 which are freely rotatable on the conduits 24, 25, a central portion of the spring having, as shown, turns of lesser pitch than the turns of the coil whilst the adjacent end portions of the spring have turns of greater pitch than the coil turns. By rotation of the hand wheels 32 and consequent deformation of the coil 14, the valve sleeve 29 is moved from the open position shown, to a closed position covering the ports 28.
Patent GB-1107050-A (GB)
Title: Improvements relating to multi-stage centrifugal pumps
IPC: F04D29/42
Filed: 1965-10-01
Abstract: 1,107,050. Centrifugal pumps. SULZER BROS. Ltd. Oct. 1, 1965 [Oct. 30, 1964], No. 41760/65. Heading F1C. A multi-stage centrifugal pump comprises interstage flow guide members 4 each consisting of a ring 4a and vanes 4b, each guide member being secured to the pump casing by welding or pinning some of the vanes to the casing. Each guide member may be divided into four parts along two planes parallel to one another and to the pump axis, for ease of insertion into and removal from the casing. The casing is split into parts 1, 2, 3 joined by bolted flanges or, as shown, by welding, each joint extending around a guide member 4. A diffuser element 12 bears against a thrust ring 16 located in an annular groove in the casing. Rings 17, 18 which bear against the thrust ring 16 can be moved apart from one another, as by screws or wedges, to press the diffuser elements 14, 11 of the preceding stage against a shoulder 19 or against a corresponding thrust ring associated with the preceding stage if the latter is not the first stage.
Patent GB-927571-A (GB)
Title: Improvements in or relating to means for handling, transferring and transporting goods on vehicles
Inventor: ORWIN OLAF JOHN BARCLAY
IPC: B60P7/08
Filed: 1958-12-29
Abstract: 927,571. Loading freight-carrying trolleys on vehicles. CARGON TRANSPORT (GREAT BRITAIN) Ltd. Dec. 24, 1959 [Dec. 29, 1958], No. 41822/58. Addition to 897,405. Class 78 (4). The wheels on the platform of the parent Specification are replaced by ball castors. As shown, each ball castor 15 is secured by a bolt 21 between a pair of Z-section members 14. The tracks described in the parent Specification are replaced by a flat strip 28, which may extend the full width of the vehicle, to which are secured members 24 confining the balls. Alternatively, the balls may run in top-hat section members of which the central portion is formed as a channel with inclined sides and a flat bottom. The ends of the channels receiving the balls may be flared.
Patent GB-926037-A (GB)
Title: Improvements in or relating to the treatment of epoxy resins
IPC: C08G59/40
Filed: 1959-12-10
Abstract: A treatment of epoxy resins prior to hardening comprises evacuating at a temperature of 80 DEG  to 180 DEG C. and at a pressure of less than 5 mm. Hg. an epoxy resin which contains not more than one hydroxyl group in the molecule and has an epoxy equivalent of between 165 and 400, restoring normal pressure, and stirring into the hot melt 0,1 to 40 parts per 100 parts by weight of resin of a trialkyl borate or tetraalkyl orthosilicate, whereupon the vacuum treatment is repeated to remove the volatile reaction products of epoxy resin and borate or silicate.  Specified reactants are the tri-methyl, ethyl, propyl, isobutyl and isoamyl borates, and methyl and ethyl orthosilicates.  In the reaction, the alcohol is given off and a glycidyl polyether borate or silicate is formed.  The latter will harden only after the addition of hardening agents.  In the examples, glycidyl polyethers are treated as above and are hardened in (4) with dodecenyl succinic anhydride, (5) with hexahydrophthalic anhydride, and ground quartz added, to form coatings, and (6) with hexahydrophthalic anhydride and used to impregnate mica-glass fabric insulation.  Specification 819,191 is referred to.ALSO:For the preparation of a temperature-resistant, high-voltage insulation, several layers of an absorptive mica-glass fabric strip are wound around the copper conductor and dried at 140 DEG C. under 0,1 mm. pressure; the temperature is reduced to 60 DEG C. and the wrapping is vacuum impregnated with a preheated mixture of a treated epoxy resin and hexahydrophthalic anhydride hardener.  The epoxy resin is one which has been treated by reacting with tetraethyl silicate (see Group IV(a)).  After restoring normal pressure, the impregnated layer is calibrated to size by pressing on all sides and is then cured at 170 DEG C.  Specification 819,191 is referred to.
Patent GB-1316699-A (GB)
Title: Power transistors having controlled emitter impurity concentrations
IPC: H01L29/00
Filed: 1971-09-09
Abstract: 1316699 Transistors RCA CORPORATION 9 Sept 1971 [17 Sept 1970] 42174/71 Heading H1K In the manufacture of a transistor the value of # max  is selected, the value of the sheet resistance of the active part of the base region calculated in advance of the emitter diffusion, and the conditions of emitter diffusion chosen so as to produce an emitter region the sheet resistance of which adjacent the emitter-base junction approximates to the quotient of calculated base sheet resistance and # max  to within 50%, preferably to within 25%. The transistor has improved characteristics in respect of second breakdown.
Patent GB-1087159-A (GB)
Title: Method of optical printing especially for disanamorphosation and anamorphosation of films
IPC: G03B27/68
Filed: 1964-10-15
Abstract: 1,087,159. Continuous projection printing. COMITETUL DE STAT PENTRU CULTURA SI ARTA, RUMANIA. Oct. 15, 1964 [Oct. 15, 1963], No. 42208/64. Heading G2A. In an optical printing method, light from a source S passes through a negative film strip N and falls on a light-sensitive film strip PV, both strips moving continuously in parallel planes but at different speeds. The light passes through a slit which may be positioned at f (as shown in full lines), or alternatively at the broken line positions of f 1  or f 2 . Or there may be more than one slit. A spherical lens system SO is interposed in the light path, and is movable along the optical axis to vary the magnification. By suitable adjustment of the relative speeds of the film strips N and PV, the arrangement can be used for producing an anamorphosed (or deanamorphosed) image of the negative original.
Patent GB-1285082-A (GB)
Title: Suspension means for overhead travelling cranes and trolleys
IPC: B66C7/00
Filed: 1969-08-25
Abstract: 1285082 Overhead railways DEMAG ZUG GmbH 25 Aug 1969 [2 Nov 1968] 42280/69 Heading B7L Suspension means for an overhead travelling crane or trolley comprises two tracks 1, 2 separated by an air gap 7 and one pair of wheels 5 (Fig. 3) or two pairs of wheels 5 (Figs. 1, 2) each pair being mounted in tandem; each pair of wheels 5 is mounted by suspension links 6 on a common bolt 4 and the bolt 4 is mounted on a rocker arm or blancer 3 (Fig. 1), on a girder 8 (Fig. 2), or on a cross-beam 12 of an overhead trolley frame 13 (Fig. 3), which balancer 3, girder 8 or frame 13 is held horizontal and thus prevents swinging movement of the wheels 5 in a vertical plane as they pass over the air gap 7. The balancer 3 and girder 8 are shown to be maintained horizontal by the presence of two pairs of wheels 5. In Fig. 1 the ends of the rocker arm 3 are formed as bearings 9 for the bolt 4. In Fig. 2 each bearing 9 is provided with a shank 9a, and guide bushes 11 provided on the girder 8 are each mounted on a shank 9a and supported by cup springs 10.
Patent GB-1087629-A (GB)
Title: Rotor blade mounting
IPC: F01D5/32
Filed: 1966-09-22
Abstract: 1, 087, 629. Turbine blade fixing. GENERAL MOTORS CORPORATION. Sept.22, 1966 [Oct. 24, 1965], No.42366/66. Heading F1T. [Also in Division F2] A turbine blade 18 is mounted on its rotor 12 by an axially extending pin 24 passing through aligned apertures in the blade tangs 16 and rotor flanges 15 and retained in position by a lock tab 34 and retaining element 36 engaging an annular groove 26 in a rotor flange 25 and a groove 30 in the pin. The lock tab 34 is a flat piece of soft metal having an arcuate portion 42 at its right hand side as viewed in Fig. 3. The left hand side of the lock tab is enlarged so as to engage at 44 the rotor groove 26 when the tab is entered into the rotor and pin grooves from the left. The retainer 36 is entered into the grooves from the right and the portion 42 of the tab 34 bent up to engage the edge 56 of the retainer and thus lock the retainer, tab and pin in position. The rotor can be balanced by varying the amount of additional material 58 on the retainers 36.
Patent GB-904485-A (GB)
Title: Differentially coated galvanized sheet or strip
IPC: C23C2/00
Filed: 1960-12-12
Abstract: Galvanized ferrous sheet or strip has on one of its sides a layer of zinc with an interface alloy layer lying between the zinc and the base, and has on its other side a thin coating of zinc wholly alloyed with the base.  The product is made by (a) subjecting the sheet or strip to a cleaning and oxidizing operation, (b) reducing the oxide layer on the sheet by passing it through a furnace containing reducing gases, (c) passing the sheet through a cooling hood containing reducing gases into a bath of molten zinc optionally containing a minor amount of aluminium, (d) withdrawing the coated sheet from the bath through exit rolls and scraping one surface of the sheet above one of the rolls so as to remove the greater part of the zinc coating metal therefrom, and (e) subjecting the same surface of the sheet to localized heat, e.g. by means of gas ribbon burners or electrical means.  In a modification of step (d), differential coating may be effected by grooving the exit rolls or by using an air blast on the meniscus at the exit rolls.