baber/WOPTO huggingface dataset:
Patent GB-1181417-A (GB)
Title: An Oscillator Circuit
IPC: H03K3/282
Filed: 1967-11-06
Abstract: 1,181,417. Pulse oscillators. BORG-WARNER CORP. 6 Nov., 1967 [27 Dec., 1966], No. 50409/67. Heading H3T. An oscillator comprises two parallel resistance-capacitance arms connected across supply terminals and a switching device having control terminals connected across intermediate points on the arms whereby the capacitors charge until the voltage at the control terminals reverses whereupon the switch conducts to produce a voltage across a load in one arm and resets the capacitors. Fig. 4 shows such an oscillator arranged to have a frequency independent of supply voltage. Capacitor 39 charges positively and capacitor 40 charges negatively until the voltage between 36 and 37 reverses, whereupon the two transistors start to conduct. Regeneration causes both transistors rapidly to saturate and discharge the capacitors. When the discharge is such that one capacitor ceases to provide base-emitter current the transistors regeneratively cut-off and charging recommences. Valves could replace the transistors and the load R L  may be supplemented by a further load r L .
Patent GB-1038629-A (GB)
Title: í¸-3-oxo-steroids
IPC: C07J1/00
Filed: 1963-07-09
Abstract: The invention comprises D 4,6-3,20-dioxo-11a , 17a ,21 - trihydroxy - 16a  - methyl - pregnadiene and mono-, di- and tri-alkanoyl esters thereof; and D 4,6,9(11) - 3,20 - dioxo - 16a  - methyl - 17a -hydroxy - 21 - acetoxy - pregnatriene. They may be prepared (1) by bromination of appropriate D 4 - 3 - oxo - steroids and dehydrobromination of the 6-bromo-steroids formed; (2) by treatment of appropriate D 4-3-oxo-steroids with dehydrogenating agents such as manganese dioxide or quinones; or (3) by bromination of 3-oxo-ring A saturated steroids to give 2,4-dibromo-steroids and dehydrobromination of these.  In (3) D 1,4-3-oxo-steroids are also formed but they do not predominate if dehydrobromination is effected in a dialkyl-amide derived from an alkanoic acid of at most 2 carbon atoms, if desired with the addition of a lithium halide, at 20 DEG to 100 DEG  C.  In examples (1), (3) and (4) 2,4-dibromo-3,20-dioxo-11a ,21-diacetoxy - 16a  - methyl - 17a  - hydroxy - allopregnane (prepared by bromination of the unbrominated steroid) gives, by method (3), the required D 4,6-3-ketone, some D 1,4-3-ketone, and, as a by-product, D 4-2-bromo-3,20-dioxo-11a ,21-diacetoxy - 16a  - methyl - 17a  - hydroxypregnene; (2) 3,20 - dioxo - 11a  - formyloxy - 16a  - methyl-17a  - hydroxy - 21 - acetoxy - allopregnane (prepared by formylation of the 11-ol) is brominated to 2,4 - dibromo - 3,20 - dioxo - 11a  - formyloxy-16a  - methyl - 17a  - hydroxy - 21 - acetoxy - allopregnane, and this by the method (3) gives the required D 4,6-3-ketone and some of the 11a -ol which is then reformylated; (5) 2,4-dibromo-3,20 - dioxo - 11a ,17a  - dihydroxy - 16a  - methyl-21 - acetoxy - allopregnane (prepared by bromination) by method (3) gives the required D ,4 6-3-ketone which is then formylated to the 11a  - formyloxy compound; (6) 2,4 - dibromo-3,20 - dioxo - 11a  - tosyloxy - 16a  - methyl - 17a -hydroxy - 21 - acetoxyallopregnane (prepared by bromination) by method (3) gives D 4,6,9(11)-3,20-dioxo - 16a  - methyl - 17a  - hydroxy - 21 - acetoxy-pregnatriene; and (7) the first product of (5) is hydrolysed to the free triol.
Patent GB-1516279-A (GB)
Title: Conveying and depositing mineral fibres to form a mat
IPC: D04H1/4209
Filed: 1976-12-03
Abstract: To form mineral-wool fibres, mineral melted in a fibration unit (5) is thrown off from the outside of a rotatable cylinder (6) having a horizontal axis. The fibres are transported by means of a gas stream to a gas-permeable collecting band (12), where the fibres settle in the form of a mat, at the same time being separated from the gaseous medium. The gas stream is accelerated over some of the distance between the fibration unit (5) and the collecting band (12), starting at the fibration unit (5), in order to prevent the formation of flocks. For this purpose, the apparatus has a horizontal spinning chamber (1) of rectangular cross-section and two vertical walls (17, 18). The fibration unit (5), which comprises the cylinder (6), is arranged at the entry end (2) of the spinning chamber, whilst the collecting band (12) is arranged at the exit end (8) of the spinning chamber. The spinning chamber (1) is connected to a blower (9) for generating a pressure difference between the entry end and the exit end. The cross-section of the spinning chamber (1) decreases in the direction from the entry end (2) towards the exit end (8) along some of the distance between these two ends. <IMAGE>
Patent GB-1028608-A (GB)
Title: Internal combustion engine combustion chambers
IPC: F02M69/00
Filed: 1964-12-14
Abstract: 1,028,608. Combustion chambers. FORD MOTOR CO. Ltd. Dec. 14, 1964 [Jan. 2, 1964], No. 50754/64 Heading F1B. Fuel injected on to an impingement surface 25 is vaporised by air forced through the space 21 on the compression stroke, the rich mixture so formed being ignited by a sparking plug 29. The fuel is injected on the suction stroke or early in the compression stroke. In Fig. 4 (not shown) the impingement surface 54 is formed in a projection 49 which enters the mouth of the combustion chamber 46 at top dead centre. In Fig. 10 (not shown) the fuel is injected by a nozzle 107, situated immediately upstream of the intake valve 97, on to a surface 109 in a projection 103 which enters a secondary cavity 102 in the piston at top dead centre, whereby air is forced through passage 105 over the surface 109.
Patent GB-1492888-A (GB)
Title: Rotary positive-displacement fluid machines
IPC: F03C2/30
Filed: 1975-12-12
Abstract: 1492888 Rotary positive-displacement fluidmachines E M RYLEWSKI 12 Dec 1975 [13 Dec 1974] 50940/75 Heading F1F In a machine that is generally similar to those disclosed in Specification 1392105 a rotor 22 has vaned wheels 27 meshing simultaneously with spiral ribs on stators S 1 , S 2  so that a proportion of the working fluid travels between the ribs of the stator Si from a chamber 15 to a chamber 16 while the rest of the fluid travels in the opposite radial direction between the ribs of the stator S 2  from a chamber 54 to a chamber 55, the chambers 15, 54 being inter-connected by e.g. conduits 51 in the rotor, and the chambers 16, 55 being connected to a common discharge chamber 57. To reduce leakage each of the wheels may comprise two plates 101, 102 biased in opposite circumferential directions by a spring 109 lodged in annular cavities 112, 113.
Patent GB-1389841-A (GB)
Title: Folding drinking bowl
IPC: A01K7/00
Filed: 1971-11-04
Abstract: 1389841 Drinking bowl EPRO PRODUCTS Ltd 18 Dec 1972 [4 Nov 1971] 51326/71 Heading AIM A foldable bowl made of flexible, waterimpervious material has a stiffened rim 18 to retain the bowl shape when in use. It is sufficiently flexible to enable the base to be folded between the sides, the whole then being folded about the seams 16, 17 and rolled into a compact form and retained by a releasable fastening 22, 23 on a flap 21.
Patent GB-1137483-A (GB)
Title: Improvements in or relating to nuclear reactor coolants
Inventor: FEATES FRANCIS STANLEY
IPC: G21C15/28
Filed: 1964-12-17
Abstract: 1,137,483. Nuclear reactor coolants. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 6 Dec., 1965 [17 Dec., 1964; 16 June, 1965], Nos. 51464/64 and 25553/65. Heading G6C. In order to reduce reaction between the carbon dioxide coolant and the graphite in a graphite-moderated gas-cooled nuclear reactor, there is added to the coolant one of the following compounds: azomethane, acetone, acetyl acetone, acetaldehyde, diacetyl, diethyl ether, tetramethyl silane, trimethylamine, xylene, tertiary-butyl peroxide, toluene, trimethyl benzene, ketene, diketene, diazomethane, ethylene oxide, dichloromethane, and acetylene. The compound may be added either continuously or intermittently. Carbon monoxide may also be present in an equilibrium proportion. Alternatively, the graphite may be contacted with a mixture of the additive and an inert gas, e.g. helium or nitrogen; carbon dioxide subsequently passed in contact with the graphite does not react so readily. Experiments are described in which graphite labelled with carbon-14 is subjected to vacuum ultra-violet radiation and contacted with CO 2  containing various additives. Other similar experiments are carried out in a reactor loop. Reference has been directed by the Comptroller to Specification 874,487.
Patent GB-1262465-A (GB)
Title: Improvements in or relating to electric storage heaters
Inventor: EELES WILFRED TREFOR
IPC: F24H7/00
Filed: 1968-10-30
Abstract: 1,262,465. Storage heaters. ELECTRICITY COUNCIL. 22 Oct., 1969 [30 Oct., 1968], No. 51481/68. Heading F4U. The core of an electric storage heater comprises blocks formed of sintered particles of ferric oxide. The blocks may be formed by compressing finely divided iron oxide, e.g. magnetite or haematite, and then sintering in air for oxidization at a temperature above 1000‹ C., or the iron oxide may be ferric oxide.
Patent GB-1209645-A (GB)
Title: Method of welding steel
IPC: B23K35/22
Filed: 1967-11-13
Abstract: 1,209,645. Welding by fusion. CARBOLINE CO. 13 Nov., 1967 [14 Nov., 1966], No. 51631/67. Heading B3R. [Also in Division C4] Steel plates are cleaned, coated with a weldable primer comprising a sacrificial metal dispersed in an amphoteric metal or silicon binder and welded by automatic or semiautomatic fusion welding without prior removal of the primer. The sacrificial metal may be zinc, aluminium or magnesium as metals, mixtures or alloys. Specified binders are silicate esters, alkyl polysilicates, titanate esters, polytitanates, lithium silicate, ammonium silicate, potassium silicate, sodium silicate or colloidal silica. Other constituents which may be included in the primer are solvents, pigments, extenders, thixotropic agents, inert silicate fillers, asbestos, sulphides and chromates. The coating preferably contains 50- 98% of sacrificial metal. Submerged arc and gas-shielded arc welding are referred to. Shielding gases mentioned are carbon dioxide alone or mixed with 75% argon.
Patent GB-1159268-A (GB)
Title: Method and apparatus for Forming a Bearing Shell from a Flat Strip
Inventor: FISHER HAROLD
IPC: B21K1/04
Filed: 1966-11-23
Abstract: 1,159,268. Making bearing shells; bending. UNIVERSL METALLIC PACKING CO. Ltd. 22 Nov., 1967 [23 Nov., 1966], No. 52438/66. Headings B3A and B3E. A method of forming a bearing shell from a flat strip comprises forcing the strip longitudinally through a passage which is curved to the desired curvature of the shell, and the shell is formed around a roller which partly defines the passage. An apparatus for carrying out the method comprises a flat bed 11 with a guide groove along which the strip 13 is moved by a pusher 14. Discrete pieces or continuous strip may be used. At the end of the bed is a curved member 16 which bends the strip so that it curls round a roller 15 which is rotatable about its own axis. Bolted to each side of the bed are cheeks 24. One of these cheeks supports a hollow spindle 26 on which the roller is mounted. A plunger 28 which can slide into the spindle against a spring 29 has fixed to it a plate 31 which is connected by three rods 32 to a part-annular ejector ring 33. The other cheek 24 has a bore through which the formed shells can slide. In operation there are three shells in the apparatus at any time. The last formed shell occupies the position shown at 19, the previously formed shell has been moved by the ejector 33 to the position 21 and in this position, fills the annular clearance between the roller 15 and the bore in the cheek 24, so that the outer end of the cantilevered shaft 26 is supported. The preceding shell 22 is ejected from the cheek plate 24 when the shell 19 is moved to the right to the position 21. A crosspiece 17 above the guide groove keeps the strip flat transversely until it enters the curving passage.
Patent GB-1367462-A (GB)
Title: Forming of articles from powder
IPC: C04B35/593
Filed: 1971-10-28
Abstract: 1367462 Hot pressed Si 3 N 4  DEFENCE SECRETARY OF STATE FOR 28 Oct 1971 [5 Nov 1970] 52641/70 Heading C7D A number of Si 3 N 4  compacts having at least one curved face are simultaneously formed in one hot pressing operation. The compacts are preferably formed as a block with adjacent compacts joined by a web which is removed by machining. The Si 3 N 4  powder is preferably mixed with MgO powder in a ratio of 20:1 v hot pressed at 1200 p.s.i. and 1850‹C. As shown in Fig.4 the mould 30 is fitted with powder charges 32 separated by graphite spacers 34, the charges and spacers alternating in the horizontal and vertical planes. Hot pressing is effected via tap and punch which has projections 38 and 40 contacting the top row of powder charges and spacers. The powder charges are preferably precompacted cold at 10-15 t.s.i. before charging the mould.
Patent GB-1197510-A (GB)
Title: Refrigeration Machine and Valve Thereof
IPC: F25B39/04
Filed: 1967-11-20
Abstract: 1,197,510. Valves. CARRIER CORP. 20 Nov., 1967 [19 April, 1967], No. 52669/67. Heading F2V. [Also in Division F4] Liquid refrigerant from a water-cooled condenser collects in chamber 9 and passes to the evaporator via port 13 under the control of float-operated, pivoted valve member 19. At low refrigerant levels, the member 19 approaches its closed position in which it is substantially pressure balanced. At higher levels, the member 19 meters the refrigerant flow and a baffle 31 thereon causes the flow to exert a closing force thereon to balance the force exerted by the float and thereby stabilize the member. There is also a progressively increasing hydrostatic unbalance on member 19, as the latter opens, urging closure thereof.
Patent GB-1484598-A (GB)
Title: Open-end spinning machine incorporating a movable piecing-up apparatus
IPC: D01H4/50
Filed: 1974-12-06
Abstract: 1484598 Open end spinner; piecing-up F STAHLECKER and H STAHLECKER 6 Dec 1974 [12 Dec 1973] 52887/74 Heading DID A patrolling piecing-up apparatus on an open end spinning machine comprises: means for lifting a bobbin away from a winding roller; a pair of clamping rollers; a movable suction nozzle, serving to remove an end of the thread from the bobbin and to insert the thread between the clamping rollers and into the region of a thread trimmer of the piecing- up apparatus; and a transfer clamp arranged to move the thread from the trimmer to a yarn removal channel of a spinning station to introduce the thread end into fibres to be spun. In Fig. 2 a broken yarn end is coiled on wound bobbin 12 on spinning unit 1, and mobile piecing-up unit 13 is positioned adjacent the unit. Driven roller 16 raises bobbin 12 from winding roller 10, suction nozzle 25 sucks in the yarn and as roller 16 back rotates the bobbin, nozzle 25 is pivoted, Fig. 3, and pivoted roller 20 clamps the end against driven  roller 18. Clamp 21 then clamps the yarn, Fig. 4, cutters 27, 28 cut the yarn and are reciprocated or rotated to open the end of yarn 4c, the cut yarn end is sucked away through nozzle 25, and clamp 21 is pivoted, Fig. 5, to place the opened yarn end in yarn withdrawal channel 6 of unit 1. The movement of clamp 21 re-sets yarn break detector 5 to recommence the feed of staple fibre to rotor 2. When tension sensor 29 senses an increase in yarn tension due to piecing-up, the yarn is fed back to bobbin 12, and the yarn released to run in its usual path. The clamp may comprise, Fig. 6, yarn grippers 32, 33 located within separable guides 34, 35 and mounted on pivotal arms. To form a seal with channel 6, Fig. 8, member 44 may be pressed by the clamp against spring 41. To align the yarn end with channel 6, air nozzles 70 may be provided on the clamp, Fig. 12, the yarn may be laid by an air jet in a groove of plate 74, Fig. 14, or the yarn may be centred by a jet of air swirled by helical groove 83, Fig. 17. The yarn may be introduced into channel 6, Fig. 16, by an ejector effect caused by air fed from the clamp.
Patent GB-1449559-A (GB)
Title: Production of a semiconductor device
IPC: H01L21/32
Filed: 1974-12-09
Abstract: 1449559 Semiconductor devices SIEMENS AG 9 Dec 1974 [1 March 1974] 53063/74 Heading H1K The formation of deleterious "beaks" at the interface of a silicon layer 2 and an oxygenimpervious masking layer 3* thereon during the thermal oxidation of an area of the layer 2 exposed in a trench immediately adjacent the mask 3* to form an insert SiO 2  layer 5, e.g. for device isolation purposes in an integrated circuit, is prevented by arranging that the masking layer 3* covers only a narrow strip of silicon alongside the trench and is abutted along its edge remote from the trench by a second masking layer 7 of SiO 2  slightly inset into the layer 2. The SiO 2  layer 7 thus intercepts the silicon/mask interface 2/3* and prevents "beak" formation. The mask 3* may be of Si 3 N 4 , Ta 2 O 5 , Nb 2 O 5 , Al 2 O 3  or BeO. Preferably a further layer 8, e.g. of Si 2 N 4  or SiO 2 , overlies at least the SiO 2  layer 7 during oxidation of the trench to reduce further advancement of the layer 7 into the silicon 2. The layer 7 may be formed by thermal oxidation or pyrolytic deposition, but in the latter case it is necessary first to etch a shallow recess in the layer 2 where the SiO 2  layer 7 is to be formed. The layer 2 preferably comprises epitaxial silicon on a substrate of silicon of the opposite conductivity type or monocrystalline Al 2 O 3 , Ta 2 O 5  or BeO. The trench is etched using the layer 3* as a mask before removal of the further portion of the latter layer required to permit formation of the layer 7. In device manufacture steps following oxidation of the trench the oxide 5 may serve as all or part of a diffusion mask.
Patent GB-1153160-A (GB)
Title: Production of Oxymethylene Polymers
IPC: C08G2/00
Filed: 1966-11-30
Abstract: 1,153,160. Oxymethylene polymer preparation. CELANESE CORP. 30 Nov., 1966 [14 Dec., 1965], No. 53539/66. Heading C3P. Oxymethylene polymers are prepared by homopolymerizing a source of oxymethylene units, suitably trioxane, or by copolymerizing it with one or more comonomers, in the presence of, as a chain-transfer or chain-branching agent, not more than 5% by weight of an organic compound containing at least three alcoholic hydroxyl groups in the molecule. Specified comonomers are ethylene oxide and dioxolan. Boron trifluoride and its complexes are the, specified catalysts, while cyclohexane is specified as a suitable solvent. Suitable trihydroxy compounds are trimethylolpropane, sorbitol, erythritol, pentaerythritol, phloroglucinol, glucerol, glucose, and fructose.
Patent GB-1198680-A (GB)
Title: Improvements in or relating to the production of N-Substituted Amides
IPC: C07C233/05
Filed: 1967-11-27
Abstract: 1,198,680. N-Substituted amides; and esters of sulphuric and phosphoric acids. ISRAEL MINING INDUSTRIES-INSTITUTE FOR RESEARCH & DEVELOPMENT. 27 Nov., 1967 [18 Dec., 1966], No. 53802/67. Heading C2C. N-Substituted amides are prepared by the steps of (a) reacting an " acceptor " compound (olefin, or secondary or tertiary alcohol) with a nitrile in the presence of an acidic compound (H 2 SO 4 ; H 3 PO 4  or a partial ester thereof) and (b) reacting the product of step (a) with a compound of the formula R<SP>1</SP>XH in which R<SP>1</SP> represents a hydrocarbon or substituted hydrocarbon radical, and may represent a hydrogen atom when the acidic compound is phosphoric acid or a partial ester thereof, and in which X represents oxygen or sulphur, provided that when the acidic compound is phosphoric acid or a partial ester thereof the " acceptor " compound must be liquid. Except when R<SP>1</SP> is H, esters of the general formula R<SP>1</SP>A 2 XPO 3  or R<SP>1</SP>HXSO 3  are also formed, from the corresponding acidic compound HA 2 PO 4  or H 2 SO 4  (where A is hydrogen or an optionally substituted hydrocarbon radical). The N-substituted amides may be hydrolysed to the correspondng amines.
Patent GB-1356800-A (GB)
Title: Sheet material
IPC: C09J7/21
Filed: 1971-11-23
Abstract: 1356800 Ethylene copolymer coating compositions E I DU PONT DE NEMOURS & CO 23 Nov 1971 [23 Nov 1970] 54391/71 Heading C3P [Also in Division B2] Sheet materials with heat seal and hot tack properties comprise flexible paper sheets coated with compositions comprising (A) a copolymer of ethylene with a vinyl alkanoate and optionally up to 10 weight per cent of an α,#-ethylenically unsaturated carboxylic acid, and (B) a copolymer of ethylene with an α,#-ethylenically unsaturated carboxylic acid in which 30 to 90 per cent of the acid groups are neutralized, in proportions of A to B of 10: 90 to 90:10 by weight. The vinyl alkanoate may be vinyl formate acetate, propionate or butyrate. The acid may be acrylic, methacrylic, fumaric, maleic, itaconic or aconitic acid. The compositions may contain up to 40 weight per cent of waxes, e.g. petroleum, carnauba and beeswax; and may be applied to papers, e.g. glassine, from alkaline aqueous dispersions. In examples papers are coated with aqueous dispersions comprising ethylene/vinyl acetate copolymers, ethylene/methacrylic acid copolymers partially neutralized with sodium hydroxide and optionally paraffin wax, α- methyl styrene/vinyl toluene copolymer or sodium lauryl sulphate.
Patent GB-1181708-A (GB)
Title: Coining apparatus, methods of using such apparatus, and the products of such methods
IPC: B21J9/12
Filed: 1967-11-30
Abstract: 1,181,708. Forging; making fuel nozzles. PARKER-HANNIFIN CORP. 30 Nov., 1967 [1 Dec., 1966], No. 54511/67. Headings B3A and B3H. A depression or slot is pressed into a workpiece 19 by a punch 5 actuated by a regulated fluid pressure between the punch and workpiece. The latter is preferably a jet engine fuel spray nozzle, Fig. 4 (not shown), in the end face of which are pressed two or more fuel spray slots (17) of predetermined depth. Punch 5 is secured to a fixed press base 2 and its upper end 15 is guided in a sleeve 50 resting on a spring 55. Coining ribs (16), Fig. 3 (not shown), are provided at the upper end of the punch and are of greater axial length than the depth of the slots to be formed in the workpiece 19. The latter is located in an adapter 41 secured to the press platen 4 and the lower end 18 of the workpiece slides in the sleeve 50 so as to centre the workpiece relatively to the punch. The platen is moved by pressure fluid supplied to a doubleacting cylinder 35 through control valve 39 and pressure regulator 38 by a pump 37. The pressure applied determines the depth of penetration of the coining ribs into the workpiece which may be made of stainless steel or "Stellite" (Registered Trade Mark).
Patent GB-1291436-A (GB)
Title: Improvements in or relating to advancing mine roof supports
Inventor: YOUNG KENNETH
IPC: E21D23/00
Filed: 1969-01-21
Abstract: 1291436 Drilling machine details GULLICK DOBSON Ltd 15 Oct 1969 [21 Jan 1969 26 Aug 1969] 3276/69 and 54792/69 Headings B3B and B3C [Also in Division E1] A drill 27 for making bore-holes in the roof of a mine is mounted for horizontal adjustment on a rack 26 by means of a handle 28 and is vertically adjusted on the props 11 by slide brackets 20 actuated by rope and pulley mechanism 23. In a modification the drill is carried by two jib arms each pivoted to a prop and urged into the operative position by a ram.