baber/WOPTO huggingface dataset:
Patent GB-1383499-A (GB)
Title: Dianhydride monomers
IPC: C08G73/10
Filed: 1971-11-15
Abstract: 1383499 Diimide-dianhydrides WESTING- HOUSE ELECTRIC CORP 15 Nov 1971 [11 Dec 1970] 21186/74 Divided out of 1383498 Heading C2C  Novel diimide-dianhydrides contain imide linkages and two cyclic anhydride groups and are derived from 4-aminophthalic acid and a dianhydride containing two cyclic anhydride groups. Preferably, approximately two moles of 4-aminophthalic acid are reacted per mole of said dianhydride and the condensation effected by heating in the presence of a dehydrating agent (e.g. acetic anhydride).  Examples describe the reaction of 4-aminophthalic acid with 1,2:4,5-benzenetetracarboxylic dianhydride and with 3,4:31,41-benzophenonetetracarboxylic dianhydride, the former reaction being illustrated in the following scheme: Other specified dianhydride starting materials are 2,3:6,7-naphthalenetetracarboxylic dianhydride, 1,8:4,5-naphthalenetetracarboxylic dianhydride, 3,4:3<SP>1</SP>,4<SP>1</SP>-diphenyltetracarboxylic dianhydride, 2,3:2<SP>1</SP>,3<SP>1</SP>-diphenyltetracarboxylic dianhydride, bis-(3,4-dicarboxyphenyl)methane dianhydride, 2,2-bis-(3,4-dicarboxyphenyl)propane dianhydride, bis-(3,4-dicarboxyphenyl) sulfone dianhydride, and bis-(3,4-dicarboxyphenyl)sulfone dianhydride, and bis-(3,4- dicarboxyphenyl)ether dianhydride. Other dianhydrides contemplated to be suited are: 1,2:4,5 - naphthalenetetracarboxylic dianhydride, 1,1-bis-(3,4-dicarboxyphenyl)ethane dianhydride, 2,2-bis-(2,3-dicarboxyphenyl)propane dianhydride, 1,2:3,4-cyclopentanetetracarboxylic dianhydride, 1,2:5,6-hexanetetracarboxylic dianhydride and tetrahydrofurane - 2,3:4,5 - tetracarboxylic-dianhydride, 1,1-bis-(2,3-dicarboxyphenyl)ethane dianhydride, bis-(2,3-dicarboxyphenyl)methane dianhydride, pyrazine-2,3:5,6-tetracarboxylic dianhydride, thiophene- 2,3:4,5-tetracarboxylic dianhydride, and 1,2:3,4-benzenetetracarboxylic dianhydride (mellophanic dianhydride).
Patent GB-913293-A (GB)
Title: Improvements relating to the production of cast iron
Inventor: DIXON RONALD HERBERT THOMAS
IPC: C21C1/10
Filed: 1960-06-22
Abstract: A process of making spheroidal graphite cast iron comprises forming a bath of magnesium-containing cast iron in a vessel having a clean basic or neutral refractory lining, removing liquid slag from the metal surface, and heating the bath to raise the temperature of the metal to, or to maintain it at or near, the casting temperature.  The vessel, which may be a ladle provided with an induction heating coil, may have a magnesite or chrome magnesite lining and may be cleaned by super-heating molten iron therein; slag may then be removed from the super-heated metal and magnesium added after the metal has cooled to casting temperature. The magnesium containing metal may be protected by a plate of graphite, with or without a coating of glaze, or by a layer of magnesium oxide.  The molten metal may be held at the casting temperature until its magnesium content has fallen to from 0.02% to 0.01% before casting.  Specifications 743,456, 752,976 and 765,423 are referred to.
Patent GB-1470943-A (GB)
Title: Subsea control system
IPC: E21B43/01
Filed: 1975-05-19
Abstract: 1470943 Wells &c VETCO OFFSHORE INDUSTRIES INC 19 May 1975 [24 July 1974] 21331/75 Heading E1F A control system for operating a wellhead valve system at a subsea wellhead includes hydraulically actuated valve operators 14, 15, 16 connected through lines 28b, 29b, 30b, shuttle valves 28, 29, 30, and lines 28a, 29a, 30a respectively to an electro-hydraulic control pad 23 which receives electric signals from surface control 20 through supply line 22b, 23a and a pressure responsive sequencing valve 27 which is supplied with fluid from the surface through a single line 22a, 26 and whose output, under normal conditions, is supplied through line 27a to the control pad 23 but which can be switched, by changing the pressure in input line 22a, 26, to a selected one of the shuttle valves 28, 29, 30 through lines 27b, 27a, 27d respectively, to supply fluid directly to the valve operators 14, 15, 16 should the control pad 23 fail.
Patent GB-1488329-A (GB)
Title: Semiconductor devices
IPC: H01L21/265
Filed: 1976-05-24
Abstract: 1488329 Semi-conductor devices INTERNATIONAL BUSINESS MACHINES CORP 24 May 1976 [30 June 1975] 21374/76 Heading H1K A method of manufacturing a semi-conductor device characterized by the use of an InSb substrate and an anodized InSb insulating layer, comprises the steps, not necessarily performed in the order given, of anodizing the entire substrate surface or anodizing the substrate surface while protecting it from anodization at preselected locations, ion-implanting an impurity of a conductivity type opposite to that of the substrate in at least one preselected region of the substrate, annealing the substrate subsequent to ion-implantation, then, if the entire substrate surface was anodized, removing the anodized material at preselected locations to expose the substrate, and depositing a plurality of electrical contacts at the preselected locations which were either protected from anodization or were exposed by the removal of the anodized layer, one of the contacts contacting the ionimplanted region. InSb is anodized in a KOH or KNO 2  solution under yellow light. A photoresist or electron-beam sensitive resist is used as a mask if the entire substrate surface is not to be anodized, and the unanodized regions are later provided with ohmic electrical contacts, e.g. source and drain contacts 4, 6 in a MOSFET or emitter, base and collector contacts (16, 17, 18) Fig. 2 (not shown) in a bipolar device. When the entire substrate surface is anodized, the anodized layer 14 is chemically etched at preselected locations either immediately after the anodization, or subsequent to the ion-implantation or subsequent to the annealing of the substrate at a temperature of between 200 and 300 C. Ion-implantation using a photoresist or electron beam sensitive resist as a mask is carried out between - 200 and 100 C. and preferably at room temperature. Electrical contacts which are deposited either by sputtering, vacuum evaporation or chemical vapour deposition are typically of gold, or indium-cadmium alloys and are sintered at a temperature of between 20 and 100 C.
Patent GB-1071149-A (GB)
Title: Improvements in and relating to welding wires for electric arc welding of steel in a protective gas atmosphere
IPC: B23K35/04
Filed: 1965-05-20
Abstract: A tubular steel wire for gas shielded arc welding has a core of low hydrogen content containing in percentages by total weight of the wire 0.5-7.1% alkaline earth carbonate and at least 0.5% alkaline earth fluoride, the percentage of alkaline earth carbonate plus 4.7 times the percentage alkaline earth fluoride being less than 16. The core may also contain arc stabilizers, deoxidizers, alloying agents, e.g., Ni, Cr, Mo, and iron powder. Many examples are specified of cores containing 0.5-7.1% calcium carbonate and 0.5-3.3% calcium fluoride.  In other examples the alkaline earth carbonate is barium, strontium or calcium-magnesium carbonate.  In one example, strontium fluoride replaces calcium fluoride. A specified core is 2.5% CaCO3, 0.7% CaF2 and 0.5% SiO2.
Patent GB-1140293-A (GB)
Title: Electrical connectors
IPC: H01R9/24
Filed: 1967-05-09
Abstract: 1,140,293. Electrical connectors. F. WIELAND. 9 May, 1967 [11 June, 1966], No. 21448/67. Heading H2E. A connector for printed circuit boards having differently spaced terminals comprises individual connector elements of a width equal to the minimum terminal spacing and intermediate blank elements of the same and/or half the width of the connector elements. The connector shown in Fig. 1 comprises connector elements a, having a screw-type connector f, Fig. 4, in an insulating body e and a soldering pin g, and intermediate elements b and c. Individual elements are combined in a unit between upper and lower retaining strips (h, Figs. 10, 11, not shown), which engage recesses i in the elements and which are connected together through end elements d. The strip (h) may have a lateral enlargement (m, Fig. 9, not shown) for labelling. The connector elements a may have pin-and-socket type connector units, with or without soldering lugs.
Patent GB-315367-A (GB)
Title: Method of promoting chemical reactions and physical processes by the use of a high-frequency rotary electric field
IPC: A61N1/32
Filed: 1929-07-12
Abstract: 315,367. L³dke, W. July 12, 1928, [Convention date]. Rotary electric fields, producing. - Rotating electric fields are produced by the interaction of two or more simple electric fields or discharges directed perpendicularly or at an oblique angle to each other and energized by oscillatory sources adjusted as regards amplitude, phase, and frequency so that the resultant field is of circular or elliptic form, or corresponds to the Lissajou figures. Chemical reactions in gases or liquids are facilitated by the rotating field. As shown in Fig. 2 the constituent fields are set up between condenser plates i, j energized by an oscillatory source. The circuit of the condenser j includes a coil k which displaces the phase of the j field relatively to the i field. Independent sources such as spark gaps may be used for the two fields. Each condenser may be subdivided into two or more condensers connected in series or in parallel. The condenser faces may be of 'plane or curved form, and may be of any conductive material. The condenser plates u may be carried on rotatable drums s, Fig. 5, the operative plates being connected in circuit by brushes v which may be of mercury. The condenser plates and their energizing sources and circuits may be arranged in the annular space between two insulating tubes, the substance to be treated being introduced within the inner tube. The Specification as open to inspection under Sect. 91 (3) (a) states that the condenser plates may be of liquid metal or jets or surfaces of electrolytes, and that the plates may be elongated to form Lecher wires. Magnetic fields may be combined with the electric fields. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1490857-A (GB)
Title: Escape apparatus
IPC: A62B1/20
Filed: 1974-10-31
Abstract: 1490857 Emergency escape apparatus FUJIKURA RUBBER WORKS Ltd 31 Oct 1974 [7 Nov 1973 (4) 8 Nov 1973 12 Nov 1973 (2) 13 Nov 1973 27 Dec 1973 27 March 1974 (2)] 21466/77 Divided out of 1490855 Heading B7J The subject-matter of this Specification is substantially the same as that described in parent Specification 1,490,855, but the claims are concerned with an escape shoot adapted to be folded and stowed in a container incorporating an automatic launching means for suspending the escape shoot over the side of a ship or building to allow it to unfold ready for use.
Patent GB-531497-A (GB)
Title: Improvements in and relating to decreasing the tackiness of plastic sheet material
IPC: C08J7/046
Filed: 1939-07-24
Abstract: 531,497. Surface treatment of films. CELLULOSE HOLDINGS, Ltd. July 24, 1939, No. 21483. Convention date, Aug. 5, 1938. [Class 2 (ii)] [Also in Group VIII] The tackiness of plasticized pellicles of hydrophilic colloidal material such as cellulose hydrate, alkyl and hydroxy-alkyl cellulose ethers, gelatine or casein is decreased by depositing over the surface thereof, from a non-aqueous dispersion or solution, a multiplicity of fine particles of a composition comprising a solid aliphatic compound of waxy character in an amount insufficient to form a continuous layer. Alternatively, the composition may be applied in solid or molten condition. Suitable waxy solutions include fatty acids of not less than 11 carbon atoms in the aliphatic radical, e.g. myristic, palmitic, stearic and arachidic acids ; alkali or alkaline earth metal salts thereof, e.g. sodium or barium stearate, calcium oleate and magnesium palmitate ; their solid esters with mono- or polyhydric alcohols, e.g. methyl arachidate, ethyl lignocerate and glycol monopalmitate ; fatty amides, e.g. oleamide and stearamide ; fatty acid anhydrides, e.g. myristic anhydride and stearyl anhydride ; alcohols, e.g. heptadecancl ; ketones, e.g. heptadecanone. Hardening agents may be added in minor proportions, e.g. carnauba or candelilla wax, methyl, ethyl or benzyl cellulose, cellulose nitrate or acetate, gum dammar, zinc resinate, coumarin, alkyd or toluene sulphonamidealdehyde resins and salts of the higher fatty acids with organic bases, e.g. dimethylamine and triethanolamine stearates. Suitable solvents or dispersion media are mixtures of toluene, benzene or xylol with alcohols, esters or ketones. The particles may be deposited after plasticizing but before drying the sheet material, after manufacture, or even, after the sheets have been stuck together, by projecting an air current carrying in particles against the edge of a stack of sheets. The formation of a continuous layer is avoided by using very dilute solutions.
Patent GB-827593-A (GB)
Title: Improvements relating to the construction of overhead electric traction systems
Inventor: SWEETLAND ARTHUR GEORGE
IPC: B60M1/20
Filed: 1955-07-25
Abstract: 827,593. Supporting overhead conductors. BRITISH INSULATED CALLENDER'S CABLES Ltd. July 24, 1956 [July 25, 1955], No. 21484/55. Drawings to Specification. Class 36. A cross-span member for an overhead traction system consists of a rod of thermosetting or coldsetting synthetic resin, of the kind which sets to a hard infusible and insoluble condition, reinforced with glass filaments lying substantially parallel to one another throughout the length of the rod and distributed throughout the crosssection of the rod. The rod may comprise 55-60% by weight glass, and the resin may be a polyester resin. The rod may carry one or more collars to increase the leakage path along its surface. Specification 816,926 is referred to.
Patent GB-367713-A (GB)
Title: An improved method of producing explosives
IPC: C06B25/34
Filed: 1931-07-28
Abstract: Trinitrophenylethanol - nitramine - nitrate is prepared for use as or in an explosive somewhat like "tetryl" by nitrating betahydroxyethylaniline, which is the reaction product of aniline on ethylene oxide or ethylene glycol chlorohydrine, or by nitrating di- or tri-nitrophenylaminoethanol.  Di- or tri-nitrophenylaminoethanol is prepared by condensing di- or tri-nitrochlorobenzene with monoethanolamine.
Patent GB-790010-A (GB)
Title: Method of and apparatus for ascertaining the ratio of tensions caused by shed formation and warp thread braking action in both branches of a shed on looms
IPC: D03D49/60
Filed: 1955-07-26
Abstract: 790,010. Measuring warp tension in looms. LICENTIA TALAMANYOKAT ERTEKESITO VALLALAT. July 26, 1955 [July 30, 1954], No. 21635/55. Class 142(2) The ratio between the tensions caused by shed formation and let-off is measured by feeling the transverse movement of the beat-up line with respect to the plane of the fabric between the beat-up line and the take-up roller. A feeler 4 is pressed by a spring 7 upon the warp at the beatup line 23, and movement of the feeler is recorded upon paper 15 mounted upon rolls 13, 14 by a pen 12. The movement of the feeler may be recorded optically.
Patent GB-1466747-A (GB)
Title: Coil former for electrical devices such as choke coils and  motors
IPC: H02K3/52
Filed: 1974-05-16
Abstract: 1466747 Coil formers; joining and securing leads to windings INTERNATIONAL STANDARD ELECTRIC CORP 16 May 1974 [23 May 1973] 21745/74 Heading B8M A coil former for electrical windings comprises two flanges bounding a space to contain a winding, there being, on each half of each flange on a side remote from the space, a cavity-containing structure having side walls and a cover, the structure being open at one side and having a hinged portion over a first cavity, and a cleat in tandem with the structure, there being a slot in such flange half permitting access between the space and a second cavity between the first cavity and the cleat. Each half of each flange of a coil former, Fig. 1, has a cavity-containing structure 1 and a T-shaped cleat 9, 10. Structure 1 defines a first cavity 6 having an opening 13 and separated by barrier 7 from a second cavity into which slot 8 extends from the winding space between the flanges. The cavities are covered by cover 3 and cover 4 hinged at weakened point 17. Connecting lead 15, Fig. 3, is bent around stem 9 of the cleat, and the end of copper wire 16 wound on the former is passed through slot 8 and over barrier 7. The bored lead 15 and wire 16 are joined in cavity 6, Fig. 4, the lead being passed through opening 13. The structure 1 is then deformed by heat or ultrasonic vibration so that cover 4 rests on and secures the join in cavity 6. The former may be integrally moulded from plastics, e.g. glass-fibre-reinforced polyamide, or compression moulded. The former may be composed of several parts so formed, e.g. interfitting halves.
Patent GB-1307303-A (GB)
Title: Glass-ceramic products
IPC: C25B9/19
Filed: 1970-05-06
Abstract: 1307303 Glass-ceramic compositions COMPAGNIE DE SAINT-GOBAIN 6 May 1970 [14 May 1969] 21748/70 Heading C1M A glass-ceramic comprises (weight per cent): where R 2 O is Na 2 O and/or K 2 O, and RO is CaO + MgO + BaO (optional) + ZnO (optional), the constituents totalling at least 95% of the product and the balance, if any, consisting of incidental ingredients or impurities. In making the glass-ceramic the raw constituents are melted by oxidizing fusion, shaped into articles, nucleated and crystallized, the constituents including a felspathic rock containing substantially 1% of Li 2 O, 0À5% P 2 O 5 , 0À1% SnO, and 0À1% BeO and/or a blast furnace slag containing substantially 1% FeO, 1% MnO, 1% TiO 2 , 0À3% P 2 O 5  and 1% S which are acceptable levels of impurities. Preferably the nucleation treatment is started at a temperature lower than the softening temperature of the glass, the temperature being raised at, e.g. up to 5 C. per minute to the crystallization temperature. Nucleation may be carried out at not more than 650 C. for less than 3 hours, and crystallization at not more than 900 C. Nucleation of sheets is carried out while vertically suspended.
Patent GB-359043-A (GB)
Title: Improvements in liquid dispensing apparatus
IPC: B67D7/16
Filed: 1930-07-18
Abstract: 359,043. Delivering measured quantities of liquids. GILBERT & BARKER MANUFACTURING CO., Cold Springs- Avenue, West Springfield, Massachusetts, U.S.A. July 18, 1930, No. 21765. Convention date, Sept. 16, 1929. [Class 106 (v).] In liquid-dispensing apparatus comprising a supply pump and two measuring chambers each with a piston therein, leakage liquid passes through the hollow piston rods to the suction pipe of the pump, and an air separator in the supply system has its airexit connected to the passages' in the ..piston rods. The form shown comprises chambers 12, Fig. 1, and pistons 17, the chambers being connected by a pipe 15 open to the atmosphere at 16, and adjustable stops 18 being provided for limiting the piston stroke. The pistons have air vents 19, Fig. 3, controlled by float valves 20, and the piston rods 21 have apertures 23, so that any liquid above the pistons may pass through the rods and passages 30 and chambers 47 to a chamber 48, which conimunicates with the suction pipe 36 of the pump 33 through a pipe 52 controlled by a float-operated valve 53, Fig. 2, The pump delivery pipe 38 leads to an air separator, having air and liquid exits 56, 58, the air exit being restricted and connected to a chamber 47 by a pipe 57. Oscillating distributing valves at the bases of the chambers 12 are connected to a shaft 79 having a lever 80, Fig. 6, normally held in engagement with one of a pair of stops 81, by one of a pair of latches 86. The piston rods are connected by a resilientlysecured chain 90, and have abutments 89 adapted to release the latches through rods 88 ; when a catch is released, a spring 82 swings the lever 80 into contact with the other stop 81. Subsequently, the spring is reset by movement of a lever 101 operated by a lever 99 carried by a lever 97 linked to collars 95 slidable on the pistonrods, and actuated by abutments 94 and springs 104.
Patent GB-150534-A (GB)
Title: Improvements in, or connected with, mechanical stokers
IPC: F23K3/12
Filed: 1919-09-04
Abstract: 150,534. Johnson, J. Y., (American Engineering Co.). Sept. 4, 1919. Fuel, feeding; grates.-In a stepped-grate stoker a hollow cylindrical fuel-pusher 22 is reciprocated by fluid pressure on a fixed piston 23 and works in a cylinder 21 communicating at its front end with a hopper 20 and a " retort " 8, and each fuel-pusher 22 also operates, through a lever 32, an auxiliary fuel-pusher 30 and a section 9 of stepped grate. The dumping section 11, normally supported by a pawl 12, is operated, through the linkage shown, by a power cylinder 13. Admission and exhaust of pressure fluid to the cylinder 22 is by way of passages in the piston 23 and piston-rod, and is under control of a pressure-actuated main valve 54, Fig. 2, itself operated by pressure fluid under control of a pilot valve 60 actuated by tappets 67 on the fuel pusher 22.
Patent GB-1501117-A (GB)
Title: Boilers
IPC: F24H1/24
Filed: 1975-05-15
Abstract: 1501117 Water heating boilers TRIANCO Ltd 15 May 1975 [16 May 1974] 21933/74 Heading F4A A water heating boiler fired by a gas or oil burner 2 is provided with a silencer 15 in its exhaust duct which acts both to reduce noise and to create a positive back pressure against which the boiler is fired; the silencer includes a perforated sleeve 16 (surrounded by soundabsorbing and thermally insulating material 18, e.g. glass fibre) through which the flue gases pass and the gases are directed through rightangled turns as they move from combustion chamber to outlet. The boiler shown is wall mounted with a balanced flue arrangement passing through the wall 10 and water is contained in the double walls of an enclosure 1 and in one or more water-filled projections 7. Combustion air enters through opening 13 and at the end of sleeve 16 the flue gases are turned at right-angles to exit through side ports 20; a perforated plate 22 backed with glass fibre 23 extending opposite the sleeve 16. A flue gas baffle 24 is mounted level with the silencer sleeve and comprises a rectangular perforated casing 25 filled with glass fibre 26 and flue gases are directed over three sides of this baffle. In a modified form the flue terminal with silencer can extend vertically upwardly above baffle 24 and an opening 29 closed by a plate 30 is provided for this purpose. A removable outer casing 28 is provided and this may be weatherproof if the boiler is to be mounted on an outside wall.
Patent GB-1511402-A (GB)
Title: Triols containing hydantoin rings
IPC: C08L67/00
Filed: 1976-05-27
Abstract: 1511402 1,3 - Bis - [3 - (2 - hydroxyalkyl)- imidazolidine - 2,4 - dion - yl] - 2 - hydroxypropane derivatives CIBA-GEIGY AG 27 May 1976 [3) May 1975] 22017/76 Heading C2C [Also in Division C3] The invention comprises compounds (I), when R 1  and R 2  are hydrogen, methyl, ethyl or isobutyl or together form tetramethylene or pentamethylene; R 3  is hydrogen or methyl and R<SP>4</SP> is hydrogen, methyl or ethyl and their preparation by reacting a compound (II) with on oxirane (III). The bis-hydantoins (II) may be made by reacting a hydantoin (IV) with a 1,3-dichloropropane-2-ol; with an epihalohydrin and reacting the resulting monoglycidyl compound with further hydantoin (IV); or with epihalohydrin and splitting of hydrogen halide.
Patent GB-844005-A (GB)
Title: Improvements in or relating to the preparation of water tubes of steam plant for chemical cleaning
IPC: C23G3/04
Filed: 1958-07-11
Abstract: 844,005. Removing incrustation. BORG HOLDING A. G. July 11, 1958 [Nov. 23, 1957], No. 22251/58. Class 123(1) [Also in Group XXVIII] In a method of preparing water tubes of steam plant prior to chemical cleaning the tubes are scavenged with steam so as to remove any water or air present therein and are then closed at their outlet whilst maintaining or increasing the steam supply and permitting or causing cooling of the tubes and condensation of the steam until air free water filling of the tubes is achieved. The tubes may be heated during the scavenging operation.