baber/WOPTO huggingface dataset:
Patent GB-301465-A (GB)
Title: Improvements in and relating to centrifugal compressors
Filed: 1928-11-27
Abstract: 301,465. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). Nov. 30, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. Controlling and regulating.-The pumping limit of a centrifugal compressor is reduced by imparting a decreasing positive or increasing negative velocity component to the working fluid before it enters the rotor, when with a decreasing discharge the normal pumping limit is reached. The desired component may be imparted by an adjustable guide disposed at the inlet to the rotor. The guide may be adjusted by hand, or automatically 'by the difference in the pressures at the entrance and throat of a venturi tube through which passes the discharged working fluid. In multi-stage compressors an adjustable guide is arranged at the inlet to each rotor or group of rotors.
Patent GB-1096056-A (GB)
Title: Improvements relating to systems for controlling the excitation of polyphase machines
Inventor: STEPHEN KENNETH DAVID
IPC: H02P25/02
Filed: 1963-09-04
Abstract: 1,096,056. Exciting polyphase machines; control of A.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 2, 1964 [Sept. 4, 1963; Jan 27, 1964], No. 34990/63 and 3412/64. Headings H2A and H2S. In a system for controlling the undirectional excitation current of a polyphase A.C. machine e.g. a generator or a synchronous induction or synchronous motor 1, an exciting winding 5 of the machine is connected to receive unidirectional exciting current from a full-wave rectifier bridge 6 connectible to an A.C. source 7 and having a controlled rectifier 15 as the rectifying element in at least one arm thereof, and a control circuit means 14 is operable when the machine load current exceeds and/or when the line voltage is less than respective predetermined values to determine the proportion of each half cycle that the controlled rectifier is conductive such proposition being in dependence on the magnitude of the current excess and/or voltage drop. The latter are detected by current and voltage transformers 36 . . . 38 which causes a rectifier 40 to render conductive, in turn, transistors 16, 17 and the rectifier 15. In Figs. 2 and 3, controlled rectifiers 15 are provided in two arms of the bridge 6 in which case the control circuit is duplicated and a constant minimum voltage bias is applied to one of them. The excitation may be conveyed to the rotor 4 in a brushless, or otherwise, manner, and may be polyphase.
Patent GB-742451-A (GB)
Title: An assembly of two safety devices and a warning device for pressure vessels
IPC: A47J27/09
Filed: 1953-12-16
Abstract: 742,451. Valves. HAUTIER, C. Dec. 16, 1953 [Dec. 19, 1952], No. 35047/53. Class 135. A unit assembly of two coaxial pressure sensitive safety devices and an audible warning device mounted on, e.g., the closure 1 of a pressure vessel, comprises a plate-like valve 12 having an annular rib 13 spring pressed on to a resilient seating 14 on the closure and carrying a spring-pressed valve 2 obturating a conduit 11 leading from the vessel through the valve 12 to a whistle 6, operated by pressure when the valve 2 opens. The spring 9 loading the valve 2 is adjusted by a pin 8 on the slidable whistle body 5 engaging one of the slots 3, 4 in the valve casing 15 and a spring 10 lifts the valve 2 from its seating 3<SP>1</SP> when the pin is disengaged from the slot. The dished springs 18 loading the plate valve may be replaced by a helical spring.
Patent GB-1006950-A (GB)
Title: Semi-conductor vario-losser circuit
IPC: H03G7/00
Filed: 1962-09-14
Abstract: 1,006,950. Automatic volume control. NORTHERN ELECTRIC CO. Ltd. Sept. 14, 1962 [Oct. 30, 1961], No. 35139/62. Heading H4R. An automatic volume control circuit comprises a variable impedance network in the input circuit of an amplifier with expansion and compression circuits connected to the network so that at low signal input levels the expansion circuit permits current to flow to the network to reduce the gain of the system. At a first predetermined level the expansion circuit reduces the current flowing to the network and so increases the gain of the system until with no current flow to the network the gain is at a given value at a second predetermined input signal level. Between the second and a third predetermined input level the gain remains constant at the given value, and then above the third predetermined level the compression circuit operates to supply current to the network to reduce the gain of the system and to tend to hold the signal output level constant with any further increases in signal input. Fig. 3 shows a preferred embodiment in which a variable impedance network in the input of amplifier 36 includes diodes 27 and 28 whose impedance is controlled by the D.C. current flowing through them. At low signal inputs the diodes 27 and 28 are conducting heavily, due to current derived from the potential appearing at point 58 of the potential divider across the D.C. supply, and the attenuation of the input circuit is high. As the signal level increases the amplifier output is rectified by diode 42 and the voltage so produced across capacitor 44 backs off the potential appearing at point 58 and reduces the current through diodes 27 and 28 and reducing the attenuation of the input circuit of the amplifier. Due to the positive feedback action once the change in attenuation of diodes 27 and 28 is appreciable the circuit will quickly change to the condition where no current is flowing through diodes 27 and 28, i.e. the rectified signal voltage exceeds the voltage at point 58, and diode 41 is cut off. Further increase in signal level will cause corresponding increases in output level up to the point when the amplifier output, rectified by diodes 47 and 48, exceeds the back bias on diodes 27 and 28, developed across resistor 53, at which point the current through diodes 27 and 28 will again increase with increasing amplifier output to increase the input circuit attenuation and tend to hold the amplifier output constant.
Patent GB-1000322-A (GB)
Title: Mass polymerisation process
Inventor: PERRINS LYLE EUGENE
IPC: C08F14/06
Filed: 1963-09-05
Abstract: Polymer in the form of a transparent block is produced from ethylenically unsaturated monomeric material which is not a solvent for, and has a lower specific gravity than, the polymer produced therefrom, by a process in which the monomeric material is heated at a temperature below 90 DEG  C. in admixture with a monomer-soluble radical polymerization catalyst while subjected to a pressure in excess of the vapour pressure normally exerted by the monomeric material under the polymerization conditions. The process may be effected batchwise or continuously.  Specified monomers are vinyl chloride, vinylidene chloride and acrylonitrile. Specified catalysts are acetyl, benzoyl, lauroyl and caproyl peroxides, peresters and azobisiso-butyronitrile; and chain transfer agents, cross-linking agents, plasticizers, fillers, lubricants and pigments may also be present.  In Examples (1) and (2) vinyl chloride and (3) a mixture of vinyl chloride and vinyl acetate are polymerized in the presence of lauroyl peroxide.
Patent GB-828687-A (GB)
Title: Improvements in and relating to the insulation of the external surfaces of buildings against damp
IPC: E04D13/16
Filed: 1955-12-08
Abstract: 828,687. Roofs; walls. WALDMANN, F., [trading as DACHPAPPENFABRIK F. WALDMANN & CO., R.]. Dec. 8, 1955 [Dec. 14, 1954], No. 35211/55. Class 20(4) [Also in Group VIII] A concrete or other roof or wall surface 1, Fig. 1, is insulated in such a manner that moisture is allowed to escape, by rendering the surface dust-free by the application of a thin layer of a water-pervious undercoat and then applying a layer 2 or corrugated or embossed material backed by a plane external skin 5 which may be sanded, the corrugations or embossing of layer 2 forming rectangular sectioned channels 4 in communication with the external air. The layer 2 and skin 5 may be adhesively connected and applied as a unit to the surface 1. The ends of channels 4 may be provided with a filter and protected by an overhanging and downwardly inclined portion of the external skin 5.
Patent GB-1428857-A (GB)
Title: Process for coating tin-plated ferrous metal surfaces
IPC: C23C2/08
Filed: 1973-07-25
Abstract: 1428857 Metal cleaning compositions AMCHEM PRODUCTS Inc 25 July 1973 [27 July 1972] 35366/73 Heading C5D [Also in Divisions C7 and B2] Tin plated ferrous surfaces are cleaned prior to phosphating with a solution comprising (per cent by weight) Borase pentahydrate 60; anhydrous sodium tripolyphosphate 25À0, sodium gluconate 5À0, and non-ionic surface active agent 10À0.
Patent GB-858107-A (GB)
Title: Improvements in and relating to the combustion in a state of semi-suspension of materials in the form of grains of various sizes
Inventor: FASSOTTE ADOLPHE DENIS HENRI L
IPC: B01J8/24
Filed: 1958-11-04
Abstract: 858,107. Pulverulent fuel furnaces. COMPAGNIE DES METAUX D'OVERPELT-LOMMEL ET DE CORPHALIE. Nov. 4, 1958, No. 35402/58. Class 51 (1). Particulate fuel of low calorific value, such as colliery washings, is partially burnt in an upper fluidized bed 21, and measured amounts of material are delivered to a lower fluidized bed 10<SP>1</SP> by a pocketed drum 5. The material in the separate pockets are protected from the hot gases rising from the lower bed and are not agitated, so that fusion of the ash and clogging of the bed is prevented. The upper bed may be divided by a partition, Figs. 2 and 2a (not shown), material being fed into one side of the partition and passing through openings in the lower part of the partition to the discharge drum. The lower bed 10<SP>1</SP> may be of less area than the upper bed 21, Fig. 4, and ashes discharged through a slot extending the length of the lower bed are cooled by passing down a column with louvred walls 14 through which the air passes to mix with the gases rising from the lower bed 101 and provide the air for the upper bed. As shown the air passes through the descending column of ashes twice in different directions. The ash from the cooler falls on to a plate 15 whence it is discharged with the same speed from the full length of the cooler by a number of reciprocating chains 16 or scrapers.
Patent GB-1142630-A (GB)
Title: Method of deep drawing generally rectangular parts
IPC: B21D22/26
Filed: 1966-08-08
Abstract: 1,142,630. Making hollow-ware; stamping. D. S. COX. 8 Aug., 1966, No. 35484/66. Headings B3A and B3Q. A method of making deep-drawn generally rectangular parts, e.g. stainless-steel or enamelled iron sinks, comprises drawing a generally rectangular blank over a first rectangular punch 24, Fig. 3, having reduced zones 26 between the corners 28, and thereafter, while gripping the outer flange 8, Fig. 5, to prevent or limit further inward movement of metal, re-drawing the workpiece to final shape and depth over a second punch. The workpiece may be annealed between the drawing operations. The sides of the punches may be curved (Fig. 11).
Patent GB-992318-A (GB)
Title: Pressed sintered bodies
IPC: C22C33/02
Filed: 1961-10-02
Abstract: A mixture of 1.5-2.5% copper powder, 2.5-7.5% nickel powder, the balance being mossy iron opwder (RZ powder) is given a single pressing operation and then sintered.  The pressing is carried out at at least 4 tons per square centimetre (preferably 6) and sintering is at 1200  DEG C. for 45-240 minutes.  A die lubricant (zinc, lithium, calcium or manganese stearate, stearic acid, melamine or a stearic acid/dextrine mixture) may be included in the powder mixture.
Patent GB-510353-A (GB)
Title: Improvements in or relating to the protection of magnesium and magnesium alloys against corrosion
IPC: C23C22/24
Filed: 1937-12-23
Abstract: 510,353. Electrolytic surface treatment of magnesium. SUTTON, H., and LE BROCQ, L. F. Dec. 23, 1937, No. 35575. Drawings to Specification. [Class 41] [Also in Group II] A protecting coating is formed on magnesium and magnesium alloys by immersion, with or without the application of electric current, in a cold aqueous solution containing chromic acid ions and one or more activator salts, the pH of the solution being within the range necessary for the production of an adherent protective film in the cold in a period not exceeding two hours. The constituents of the solution and their relative concentrations are selected so that the solution has a hydrogen ion concentration curve which has a portion of such small gradient within the range above referred to that, within this range, 12 grammes of potassium hydroxide can be added to 1 litre of the solution without causing an increase of more than 2 in the pH of the solution. A solution of this type can be used for several treatments without too great a drop in the reaction velocity ; when necessary it can be revived by adding acid, e.g., chromic or sulphuric acid. The preferred activator salts which will give a solution of the required type are aluminium salts, particularly aluminium sulphate, nitrate, and aluminium alums ; chrome alums and iron alums may also be used. The chromic acid ions may be added as chromates or dichromates of the alkali metals, ammonium, magnesium, aluminium, or zinc. Permanganates may be added to the solution to improve the coating and, when aluminium salts are used, chlorides may be added to keep the alumina formed in colloidal suspension. The pH range necessary for producing the coatings in the cold in less than two hours is usually about 2-5 ; with some activator salts or when electric current is used it may be higher. When using electric current the magnesium may be made either the anode or cathode with direct current, or alternating current may be used. With certain combinations of constituents the desired pH may be obtained with concentrated or saturated solutions, e.g., a saturated solution of potassium dichromate and potassium or ammonium aluminium alum may be used, the salts being kept in the solution in perforated containers. Specifications 331,853, [Class 82 (ii)], and 506,836, [Group II], are referred to.
Patent GB-361625-A (GB)
Title: Improvements in or relating to contact devices for electrical apparatus
IPC: H01H1/42
Filed: 1930-11-26
Abstract: 361,625. Heavy current and oil-break switches ; switch contacts. KESL, K., 13, Na Slupi, Prague. Nov. 26, 1930, No. 35583. Addition to 340,043. [Class 38 (v).] In a contact device for large currents of the kind described in the parent Specification, having jaws B, C, between which the knife D enters, each jaw comprises two or more narrow contacting portions, e.g. B<1> .. B<4>, a spring a is arranged between each pair of contacting portions and the pairs are held apart from each other by partitions E<1>, E<2>, E3 which have turned-over portions F which limit the outward swing of the contacts. The cavity N may be filled with a plastic mass which damps the movement of the contacts and protects the springs from corrosion. In a modification, Fig. 5, adapted for oil switches the blade spring a is replaced by a coil spring a arranged in two telescoping tubes the inner of which has an aperture through which oil can pass, thereby damping the movement.
Patent GB-1477352-A (GB)
Title: Nuclear fuel and/or fertile material particles for nuclear reactors
IPC: C01B31/30
Filed: 1974-08-13
Abstract: 1477352 Nuclear fuel KERIVFORSCHUNGSANLAGE JULICH GmbH 13 Aug 1974 [14 Aug 1973] 35650/74 Heading G6C In particles of nuclear fuel and/or fertile material having a core consisting of, containing, or formed from a fissile or fertile metal carbide, and a coating of pyrolytic carbon with or without silicon carbide, the core contains dissolved combined nitrogen, for example as a nitride in solid solution, in order to increase high temperature stability and reduced reaction between the core and the coating. The cores may be formed by preparing spheroids containing fissile or fertile metal oxide and carbon, and sintering in the presence of nitrogen gas. Addition of zirconium to the core is also advantageous.
Patent GB-975793-A (GB)
Title: An improvement in or relating to cement guns
Inventor: BEEDHAM HARRY
IPC: E04F21/12
Filed: 1962-09-19
Abstract: 975,793. Pressure vessels for cement guns. CHAMBERS BROS. Ltd. Sept. 18, 1963 [Sept. 19, 1962], No. 35681/62. Heading E1S. A cement gun is supplied by a pressure vessel 11 filled with cement through a valve 17 the control lever 20 of which is interlocked by stops, Fig. 2, with the valve 22 for releasing the pressure so that the valve 17 cannot be opened until the release valve has been opened and the pressure released. The vessel 11 may be connected through a second pressure vessel 10 and a valve 12 to a hose 19 leading to the cement nozzle so that a valve 13 between the vessels may be closed and allow filling of the vessel 11 while continuing to supply cement from the vessel 10 to the cement gun.
Patent GB-1121528-A (GB)
Title: High severity pyrolysis apparatus
IPC: C10G9/20
Filed: 1965-08-20
Abstract: A tube furnace for cracking hydrocarbons in the presence of steam comprises a convection heated preheat section, a radiant heated preheat section and a radiant heated furnace each consisting of coiled tubes joined to each other and at least two control means comprising temperature sensing devices, the first situated in the preheater section controlling the radiant heat in that section to control the point of incipient cracking in the furnace section and the second situated in the furnace section to control the temperature therein.  In a specific embodiment the preheater section contains three thermowells, the last situated at the "cross-over" point where the narrow preheater tube joins the wider furnace tubing and the temperature is maintained here at 525 DEG  C.  Heat in the furnace section is supplied at a rate of 15,000-30,000 B.Th.U.'s per sq. ft. of tube area and residence times of 0.4-1.5 seconds are used.
Patent GB-1248587-A (GB)
Title: Improvements in or relating to oil burners
IPC: F23D11/00
Filed: 1968-07-26
Abstract: 1,248,587. Oil burner. M. P. DUNPHY and E. DUNPHY [trading as DUNPHY OIL BURNERS]. 25 July, 1969 [26 July 1968], No. 35802/68. Heading F4T. An oil burner having a housing of substantially pear-shaped section includes an electrically driven fan for forced air feed rotatable about an axis substantially parallel to the draught tube of the burner.
Patent GB-1102269-A (GB)
Title: A magnetic amplifier control system
IPC: H02P7/288
Filed: 1966-08-10
Abstract: 1,102,269. Control of D.C. motors. DODGE MANUFACTURING CO. 10 Aug., 1966 [29 Sept., 1965], No. 35823/66. Heading H2J. [Also in Division H3] A magnetic amplifier in a motor control system includes load windings 30, 32, a control winding 38, and a bias winding 36 connected by way of a diode 98 to a D.C. source, the bias winding circuit also including a capacitor 94 so that when the system is de-energized the capacitor discharges through the bias winding and sets the magnetic amplifier to a reference condition. A damper winding 39 is also provided. The control winding circuit includes a rheostat 52 for setting the maximum speed of the motor 10, 12, and a potentiometer 54 for setting the running speed. A transistor 70, normally biased just below conduction, by-passes control winding 38 if the armature current rises excessively. Potentiometer 84 injects a voltage into the control circuit to keep the speed constant in spite of load variations, and compensates for the internal resistance of the armature winding 12. A capacitor 58 charges up gradually when the system is energized so that the output increases exponentially to the set value. The control and bias fields of the magnetic amplifier oppose each other, but during normal operation the former exceeds the latter. When the system is switched off capacitor 58 discharges partly through the control winding and partly through resistors 54 and 84. The field set up by discharge through the winding tends to set the magnetic amplifier to a condition in which a high output is produced when the system is next switched on, and for this reason capacitor 94 is provided to discharge through the bias winding and set up a greater field in opposition to the undesired field.
Patent GB-395936-A (GB)
Title: Self-tightening railway permanent way
IPC: E01B9/46
Filed: 1932-12-17
Abstract: 395,936. Securing railway rails. BASELER, W., 21, Walhallastrasse, and DIETRICH, .J., 140E, Dachauerstrasse, both in Munich, Germany. Dec. 17, 1932, No. 35861. [Class 104 (ii).] Rails are secured in chairs 2 or sleepers by a key 6 which is clamped between the rail flange and chair &c. jaw 5 by a tilting movement of the rail. The key may be made of harder material than the chair and rail and of greater width than the space between the jaw 5 and the rail-flange, so that, during the tilting movement of the rail, it partly embeds itself in the jaw and flange. The jaw 5 may have a recess into which the edge of the key is inserted, and the key may be additionally secured by a wedge 10, or by welding to the jaw. In the form shown in Fig. 6, wedges 14, 17 are inserted between the jaw and the key 15. Hard granular material may be inserted between the contacting surfaces. A wooden plate &c. 9 may be arranged in a recess in the rail seat.
Patent GB-1022188-A (GB)
Title: Method and apparatus for removing insulation from the end of an electric cable and fixing the cable to a connector
IPC: H02G1/12
Filed: 1963-09-11
Abstract: 1,022,188. Jointing by stamping. F. HARTMANN. Sept. 11, 1963 [Jan. 25, 1963; April 9, 1963], No. 35884/63. Heading B3Q. [Also in Division H2] A power driven cable stripper of the kind which also fixes a connector to the bared conductor end, has a pair of tong-like jaws which first close together to sever the insulation and then pivot together about a common axis to strip the insulation. Cable stripping.-Tongs 13, Fig. 1 (not shown), are hinged at 16 and have jaws 17, 18 for severing the insulation of a cable 26. The lower arm 15 has an extension 151 which is pivoted on the body 20 of the device at 19. The lower arm also carries a spring plate 27 which acts as a feed stop for the cable and as an ejector for the cut-off pieces of insulation. As the machine starts operating, the upper arm 14 is closed towards the lower arm 15 by the downwards movement of an upper punch 10, and the gap between the cutting jaws 17, 18 diminishes until the tip of an adjustable stopscrew 23 meets the surface of a projection 21, by which time the cable insulation is cut through. Further downwards movement of upper punch 10, Fig. 5 (not shown), causes the tongs to swing in a clockwise direction about pivot 19, by reason of the reaction between sloping surfaces 101 and 171, carrying the cut-off piece of cable insulation with them. Cable gripping and fixing of connector.- During the downward movement of upper punch 10 a push rod 34, Fig. 2 and Fig. 8 (not shown), rotates a cam 311 and forces apart the ends 282 of clamping levers 28, so that their other ends 281 come together to grip the cable during the stripping and connector fixing processes. As the arm extension 151 pivots backwards when the cable is stripped, the carriage 29 carrying the clamping levers is able to swivel to an extent limited by stops 35 and move the cable bodily to a lower punch 9, where it receives from a conveyer a prepared connector which is closed upon it by the further descent of the upper punch.
Patent GB-775388-A (GB)
Title: Improvements in bee hives
IPC: A01K47/00
Filed: 1954-12-11
Abstract: 775,388. Beekeepers' appliances. SMITH, E. S. TYSOE-. Nov. 11, 1955 [Dec. 11, 1954], No. 35921/54. Class 5(2). For a beehive, a crown board g which may be transparent, is combined with a mesh or grid h for coating on both sides with candy. Viscous candy is poured over the perforated metal or wood plate h or wire gauze and when this has set, the device is turned over as shown and replaced in the top of the hive with the candy inwards. The Provisional Specification describes also a device in which the plate and grid or mesh are held in a frame by beading.