baber/WOPTO huggingface dataset:
Patent GB-1444168-A (GB)
Title: Thyristor circuit
IPC: H02M1/096
Filed: 1973-12-03
Abstract: 1444168 Thyristor control circuits ALLMANNA SVENSKA ELEKTRISKA AB 3 Dec 1973 [8 Dee 1972] 55914/73 Heading H3T [Also in Divisions H2 and G3] In a thyristor circuit having a control circuit 2 connected to the control electrode of a thyristor 1 and provided with an input terminal 3 for connection of a control pulse from an external control the control circuit 2 is fed from the voltage across the anode-cathode of the thyristor 1 by way of a voltage regulator which comprises a switch 5 and a voltage-dependent control member 6 for the switch 5 influenced by the voltage across the control circuit and the control member 6 has the character of a voltage level means which ensures that the voltage across the control circuit is kept within desired limits independently of variations in the voltage across the thyristor 1. As shown as the voltage across the thyristor 1 increases a capacitor 8 is charged via a conducting transistor 5 and when the voltage across the capacitor 8 reaches the upper switching level of a discriminator 6 the transistor 5 is blocked. Current through a reactor 7 flows through a diode 14 and the control circuit 2 continues to take power from the capacitor 8. When the voltage across the capacitor 8 has discharged to the lower switching level of the discriminator 6 the transistor 5 conducts again. The voltage across the control circuit 2 therefore oscillates between the switching values set by the discriminator 6 despite the variations in the voltage across the thyristor. The control circuit 2 can be as disclosed in Specification 1,409,381, and the input 3 can be a photo-cell controlled by light signals. In a power converter the voltage across the thyristors consists of commutation voltages and in order that the negative part of the commutation voltage may also be used and in order that there may be voltage on the control circuit even at the beginning of the positive half period of the commutation voltage a diode 13 is connected as shown. In practice the transistor 5 would be replaced by a number of series connected transistors and such tansistors (51, 52, Fig. 2, not shown) can be controlled by photo-transistors (101, 102) energized by light emitting diodes (61, 62) from the output of the discriminator 6. The thyristor circuit shown in Fig. 1 forms part of a chain of similar series connected thyristor circuits for a high-voltage converter. The voltage divider 16 consists of capacitors and resistors in series and parallel.
Patent GB-1342379-A (GB)
Title: Cup spring
Inventor: STEUER H
IPC: F16F1/32
Filed: 1971-12-03
Abstract: 1342379 Annular disc springs; variable speed gear P I V ANTRIEB WERNER REIMERS KG 3 Dec 1971 [27 Jan 1971] 56180/71 Headings F2S and F2D An annular dished disc spring has at least one section in a plane perpendicular to the plan view which is asymmetrical. The spring has an asymmetric distribution of holes 13, or cut-outs in the inner or outer periphery (Figs. 4 and 5, not shown). Alternatively the material of the spring is ground away or supplemented or a flat cut (Fig. 6, not shown) at one side of the spring, or the spring is stamped from a blank whose cross-section decreases. The cut-outs may be circular, oval or triangular and may locate the spring against rotation. When mounted centrically with respect to a component (e.g. a friction disc 1 of an infinitely variable ball-disc transmission) the asymmetric spring 8 exerts its spring force eccentrically (at the point K, Fig. 2, instead of at the centre O) on the component. In the ball-disc transmission of Fig. 8, an input shaft 6, driven at a constant speed of revolution, drives, through friction discs 1 and 2 and balls 4, a staggered output shaft 7 at a speed which depends on the position of the balls relative to the discs, which position is adjustable manually by a spindle 5. The asymmetric spring 8 maintains the balls and discs under sufficient pressure to transmit the drive. Because of the holes 13 at one side of the spring disc, this spring force does not act at the centre of the disc 1 but is radially displaced towards the disc 2 so that for all viable positions of the ball cage 3 all the balls are equally loaded. The use of an asymmetric spring concentrically mounted avoids the need for eccentric mounting, or oblique support surfaces (Fig. 7, not shown)
Patent GB-1144797-A (GB)
Title: Message tape unit
Inventor: BUCKLEY NORMAN IAN
IPC: G11B15/70
Filed: 1966-12-17
Abstract: 1,144,797. Tape cassettes. SHORROCK DEVELOPMENTS Ltd. 31 Oct., 1967 [17 Dec., 1966], No. 56584/66. Heading G5R. A message tape unit comprises a base 1 carrying a head or heads 14, 15, tape guide rollers 3-10 one of which 10 has a resilient surface and is spring-biased to project from one edge of the base, and a terminal strip 20 mounted on, or projecting from the same one edge. When loaded into associated apparatus, the roller 10, pivoted at 12, presses the tape against a capstan 16 while the contacts 21 engage in sockets to connect transistor amplifiers on the base to the apparatus. The units are attached to apparatus at a telephone substation to transmit spoken messages concerning the state of a device at the substation, e.g. a float in a reservoir, upon receipt of a telephone call. Tone bursts may be recorded to produce dialling impulses, and reflective, transparent or conductive portions may be located on the tape to initiate start and stop signals at the beginning and end of the message. The tape may be multi-track, and the heads 14, 15 or alternative heads may be used to cancel a message and record another.
Patent GB-1262990-A (GB)
Title: Process for the continuous fixation of disperse dyes on fibrous materials consisting of or containing cellulose triacetate
IPC: D06P3/48
Filed: 1969-11-19
Abstract: 1,262,990. Fixing disperse dyes on materials containing cellulose triacetate. FARBWERKE HOECHST AG. 19 Nov., 1969 [22 Nov., 1968], No. 56658/69. Heading D1B. The invention comprises a process for the continuous fixation of disperse dyes on fibrous materials consisting of or containing cellulose triacetate wherein the fibrous material which has been printed or padded with a disperse dye in presence of a fixing agent and if desired dried is treated for up to 200 seconds in a continuous steamer or on a stenter with superheated steam having a temperature above 130‹C. The cellulose triacetate may be in admixture with wool, natural or regenerated cellulose, polyamide, polyacrylonitrile and polyesters and the dyestuffs may be of the azo, anthraquinone or quinophthalone series. The usual fixing agents may be used and may be applied before, with or after the dyestuff. The examples describe padding and printing of cellulose triacetate.
Patent GB-1197120-A (GB)
Title: Gas-Fired Copula Furnace
Inventor: CHERNY ANATOLY ALEXEEVICH
IPC: H01S3/03
Filed: 1968-12-03
Abstract: 1,197,120. Cupola furnaces. PENZENSKY KOMPRESSORNY ZAVOD. 3 Dec., 1968, No. 57332/68. Heading F4B. A gas fired cupola furnace 1 is divided by upper and lower projecting shoulders 2, 3 respectively into a metal melting chamber 4 and a molten metal heating chamber 5. The metal from the upper chamber 4 runs down sloping surface 11 to drop into a well 19 at the bottom of chamber 5 prior to discharge through taphole 22. Hot air from main 15 is supplied above well 19 through nozzles 14 and passages 13, together with hydrocarbon fuel gases from pipes 16, which pipes 16 pass through hot air main 15, to promote partial decomposition of the gaseous hydrocarbons prior to their introduction into chamber 5. Further hydrocarbon fuel gases are supplied through nozzles 18. A luminous gaseous mass is therefore formed above well 19 through which the metal droplets from surface 11 must fall as they splash into the well 19. The exhaust gases from chamber 5 pass up through shift 1 to melt the metal charge in chamber 4.
Patent GB-1372365-A (GB)
Title: Plastics boxes and other three-dimensional articles
IPC: F24H9/02
Filed: 1970-12-02
Abstract: 1372365 Space heating units POWERLECTRIC Ltd 26 Nov 1971 [2 Dec 1970] 57345/70 Heading F4V A box, e.g. a casing for a fan heater unit, comprises a sheet of rigid synthetic plastics material in the form of panels 12, 14, 16 and 18 which are interconnected along hinges or bending grooves 32, V-shaped edges 36 of the panels 12, 14 engaging V-shaped grooves 34 on the panels 16. The open side of the box is closed by two aluminium extrusions and a metal grille. Air inlets 52 are formed in panel 12. The plastics material may be A.B.S. or polystyrene. The panels 16, 12, 14 may be bent relative to panel 18 by application of heat along grooves 32.
Patent GB-1416688-A (GB)
Title: Dynamo-electric machines
IPC: H02K31/00
Filed: 1971-12-14
Abstract: 1416688 Homopolar machines INTERNATIONAL RESEARCH & DEVELOPMENT CO Ltd 31 Jan 1973 [14 Dec 1971] 58036/71 Heading H2A In a homopolar machine as in Specification 1,181,821, in which the rotor carries a plurality of angularly-spaced conducting paths 1-38 and a number of stationary brushes A1-A19, B1-B19, each making contact with the paths in succession, interconnected (C1-C18) so as to provide a series connection of some of the paths, the series-connected paths are arranged in a number of series-connected groups each composed of two or more angularly-adjacent ones of the series-connected paths, the initial path of each group being angularly spaced from the final path of the previous group by a span not less than that of the smallest group. The Figure shows the machine at an instant when the two sets of brushes A1-A19, B1-B19 are contacting the even-numbered paths only, the odd-numbered paths being at this instant inactive. From the input terminal 39 the circuit extends through four adjacent even-numbered paths 20-26 forming a first group and is then taken back (C9) to the even conductor 18 adjacent the beginning of the first group. At the end of the second group 18, 16, 14, the circuit extends forward (C13) to the even conductor 28 adjacent the end of the previous (first) group, and so on. The machine can have a series/ parallel connection of rotor paths, and the spacing between adjacent brushes can be greater than two conducting paths.
Patent GB-1379418-A (GB)
Title: Method for treating and purifying the streams of pulluted gas  from an oxygen steel plant
IPC: F27D17/00
Filed: 1972-12-18
Abstract: 1379418 Purifying fumes from oxygen refining plant INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE 18 Dec 1972 [4 Jan 1972] 58278/72 Headings P4B and F4J Waste gases from an oxygen converter or continuous steel refining reactor 1 are collected in a hood 2 and fed to a combustion chamber 8 together with some of the polluted gases collected by hoods 9 and 10 at other places in the plant, and the burnt gases from the combustion chamber 8, having given up heat in the chamber to water or another medium requiring heating, are mixed with the remaining gases from the hoods 9, 10 and passed through a dust remover 17 to a stack 18. A wet dust remover 4 may be located between the converter, hood and the combustion chamber, and an explosion relief stack 7 and blowers 5, 12 are provided.
Patent GB-1279350-A (GB)
Title: Cathode ray tubes
Inventor: PRAZAK CHARLES J III
IPC: H01J9/227
Filed: 1970-12-09
Abstract: 1279350 Luminescent screens ZENITH RADIO CORP 9 Dec 1970 [5 Jan 1970] 58381/70 Heading H1D A process for making a colour television screen wherein the faceplate is first coated with opaque material in the areas between the areas to be occupied by phosphors, and a slurry is distributed over the screen as the first step in a photoresist process of depositing phosphors of a first colour, is characterized in that the slurry is allowed to evaporate without the application of heat until its viscosity is sufficient to prevent migration, after which it is dried. In one example the faceplate with its opaque coating is brought to a uniform temperature of 120‹ F. by infra-red heating followed by a rest interval to allow the temperatures of the coated and non- coated areas to equalize. With the screen rotating at 5-15 r.p.m. in a horizontal plane a slurry having a green phosphor in suspension is dispensed on to the centre of the screen, and the screen is tilted 15 degrees to distribute it. The tilt is increased to 130 degrees and the rotation speed increased to 80-100 r.p.m. to dump the excess slurry, and further rotation at the same tilt for 1¢ to 2 minutes allows sufficient evaporation to fix the slurry; a stream of gas (air) at room temperature may be directed over the screen to assist evaporation. Infra-red heaters are then energized to heat the screen and thoroughly dry the slurry layer which is subsequently exposed and developed, and the whole process is repeated for the other two phosphors.
Patent GB-1213538-A (GB)
Title: New ruthenium complexes and processes for their preparation
Inventor: CHABARDES PIERRE
IPC: B01J31/22
Filed: 1968-12-10
Abstract: 1,213,538. Ruthenium complexes. RHONEPOULENC S.A. 10 Dec., 1968 [11 Dec., 1967], No. 58560/68. Heading C2C. Ruthenium complexes of the formula where (diket) is a bidentate ligand derived from a #-diketone and has the general formula where R 1 , R 2  and R 3  are alkyl, cycloalkyl, or aryl, which may be substituted by halogen, or R 1  and R 2  or R 2  and R 3  taken together may represent a divalent hydrocarbyl radical which may be substituted by halogen, L is a mono- or bidentate ligand other than CO or a #-diketone and n is 1 or 2, are prepared by reacting a ligand L, in the presence of a hydrogenation catalyst, with a tris-(diket) Ru complex under a hydrogen atmosphere, or by reacting a complex (Ru- (diket) 2 L<SP>1</SP> n , where L<SP>1</SP> is a weaker electron donor than L, with a ligand L. Some of the complexes are claimed per se. The hydrogenation reaction is preferably carried out in the presence of a solvent, e.g. excess of L if it is liquid, and the catalyst is preferably a ruthenium compound.
Patent GB-1387640-A (GB)
Title: Finish for nylon and/or polyester yarn
IPC: D06M13/02
Filed: 1971-12-22
Abstract: 1387640 Lubricants FIBER CORP Inc 22 Dec 1971 [30 Dec 1970] 59591/71 Heading C5F [Also in Division D1] Yarns or plied structures comprising fibres of polyester and/or nylon are lubricated by applying thereto in an amount of 1 to 5%, based on the weight of the fibres, a composition comprising, by weight: (a) 70 to 94% of a mineral oil; (b) 1 to 5% of a metallic salt of a fatty acid (by which is meant a salt of a metal, especially of a polyvalent metal, and an aliphatic carboxylic acid containing 16 to 22 carbon atoms); (c) 5 to 25% of the product obtained by at least partly cross linking a triester, with a dicarboxylic acid having 4 to 8 carbon atoms or a functional derivative thereof, the triester being formed from a fatty acid having 9 to 20 carbon atoms, and a compound of the formula wherein R 1  is an alkylene group having 1 or 2 carbon atoms with the proviso that the total number of carbon atoms in both R 1  radicals is at least 3; and wherein R 2  is independently selected from a hydroxyalkyl group having 1 to 4 carbon atoms, with each of the R 2  groups on a single side of the ring being attached to the same carbon atom. The lubricant may be applied to the individual yarns or to a rope or cord made from said yarns, e.g. by passing the yarns, rope or cord over a roller dipping into a reservoir of the lubricant heated to between 50‹ and 80‹ C. Alternatively the yarn, rope or cord may be run through a trough containing the heated lubricant. The fibres may be of cotton, polypropylene, rayon, polyvinyl chloride, glass or metal, i.e. any fibres whether natural or synthetic. The fibres making up the yarn may also comprise fillers, delustrants or stabilizers, for example titanium dioxide, copper acetate and potassium iodide.
Patent GB-1246298-A (GB)
Title: Light-sensitive compositions
Inventor: BORDEN DOUGLAS GRAHAM
IPC: B41M5/30
Filed: 1968-12-20
Abstract: 1,246,298. Modified polyvinyl chloroacetate. EASTMAN KODAK CO. 20 Dec., 1968 [26 Dec., 1967], No. 60663/68. Heading C3P. [Also in Divisions C2, C4 and G2] Polyvinyl chloroacetate is heated with 4<SP>1</SP>- methoxy-4-stilbazole and then treated with sodium tetraphenyl borate to produce the tetraphenylborate salt of the quaternized polymer. This salt is used in photolithography (see Division G2).
Patent GB-1268206-A (GB)
Title: Improvements in or relating to by-pass switches
Inventor: HAVARD BYRON
IPC: H01H33/12
Filed: 1968-12-20
Abstract: 1,268,206. High voltage D.C. switches. ENGLISH ELECTRIC CO. Ltd. 16 Dec., 1969 [20 Dec., 1968], No. 60702/68. Heading HlN. A high voltage switch has isolating contacts (17), 20 in series with arcing contacts 26, 27, operating means for the isolating contacts being arranged during its initial opening movement to open the arcing contacts and then to open the isolating contacts only if the arcing ceases. The switch is employed in a D.C. converter station to by-pass the current through a by-pass valve. The isolating switch (Fig. 1, not shown) has a blade (17) movable by an hydraulic motor (not shown) to bridge fixed contacts 20, (22). The blade (17) is arranged in known manner to rotate about its longitudinal axis during the last part of the closing movement. The blade (17) has a flat end portion which in the closed position engages in a slot 38 in the face of a cam 37 lying adjacent the fixed contact 20. When the hydraulic motor is operated to open the isolator its initial movement causes the blade (17) to rotate about its axis, its flat end turning the cam 37 clockwise. A face 83 on the cam trips a latch 57 allowing the arcing contacts 26, 27 to be opened by a spring 48. The arc so produced moves into an arc chute (Fig. 2, not shown) whereupon a portion of the arc is shorted by a solenoid 28; at this time the plunger 72 of the solenoid is latched by a member 73 and therefore has no effect. Further rotation of cam 37 causes a pin 84 to engage a rod 75 to withdraw the latch 73. If by this time the by-pass valve has struck the arc at contacts 26, 27 will have died away and solenoid 28 been de-energized; the blade (17) continues to move towards the open position. If, however, the arc persists after latch 73 is withdrawn the plunger 72 moves down to trip a latch 69, 65 so that a spring-urged plunger 63 can reclose the arcing contacts 26, 27 and a spring 82 moves a latch 79 into the path of blade (17) preventing separation of the isolating contacts. This blocking of the blade causes a pressure rise in the hydraulic drive motor which by means of a pressure-sensitive switch causes reversal of the drive so that the mechanism is restored to the fully closed position shown. During closing of the isolator the rotation of the blade turns the cam back to the position shown, a link 40 moving the contacts back to the closed position. If an arc over occurs during the closing of the isolator the solenoid 28 may trip the mechanism; the latch 79 therefore is shaped to be pushed aside by the blade.
Patent GB-1246197-A (GB)
Title: Improvements in or relating to contactless variable resistors
IPC: H01C10/00
Filed: 1969-12-16
Abstract: 1,246,197. Contactless variable resistors. SIEMENS A.G. 16 Dec., 1969 [17 Dec., 1968], No. 61158/69. Heading H1K. A contactless variable resistor comprises a permanent magnet, a disc-shaped armature and a field plate attached to the armature, the magnet being rotatable relative to the armature and field plate. As shown, Fig. 1, a semi-annular permanent magnet 2 is supported above a disc-shaped soft iron armature 1 by a bearing member 3 having a shaft 6 extending through a bore in the armature 1. A field plate 4 is secured to the armature 1 in such a position that it underlies a pole face of the magnet in the position illustrated so that the maximum field is applied to produce the maximum resistance of the field plate. As the magnet is rotated by means of shaft 6 the magnetic field applied decreases until it is substantially zero when the magnet is at right angles to the position shown to produce minimum resistance of the field plate. A sheet metal cover 5 is secured to the edge of the armature 1. Apertures (7, Fig. 2, not shown) are provided in the armature so that a magnetization device may be inserted to adjust the strength of the magnet 2.
Patent GB-1284529-A (GB)
Title: Method and means for compensating birefringence in laser systems
IPC: H01S3/00
Filed: 1970-12-31
Abstract: 1284529 Lasers UNION CARBIDE CORP 31 Dec 1970 [11 Feb 1970] 61942/70 Heading HlC Birefringence in a laser rod induced by thermal stress is compensated by passing the laser beam through a medium having opposite thermal stresses. In Fig. 7, a solid rod 10 is pumped by a flashlamp 11, and is surface cooled; its inner regions are thus hotter than its outside surface and the resulting stress causes birefringence. A disc 16 of a material similar to that of rod 10 but lacking lasing ions is adjustably heated by resistance elements 18 on a metal ring 17. Since the temperature gradient of the disc is the inverse of the rod, the birefringence effects cancel. The compensated beam is stated to be suitable for electro-optic Q switching if the rod output is linearly polarized; otherwise a separate polarizer would be needed in the resonator.
Patent GB-1312176-A (GB)
Title: Push-pull amplifying devices with class d transistorized aplifiers
IPC: H03F3/217
Filed: 1971-09-20
Abstract: 1312176 Transistor amplifying circuits THOMSON-CSF 20 Sept 1971 [2 Oct 1970] 43822/71 Heading H3T In a push-pull amplifier comprising two transistors 1, 2 operating in class D and supplying a load circuit L, C, Z resonant at the frequency of the signal to be amplified, the transistors are driven by rectangular waveform signals upon which are superimposed in phase sinusoidal signals. In the embodiment sinusoidal waveforms are applied in opposite phase to terminals 71, 72 from which they are applied to the transistors 1, 2 via emitter-followers 52, 53 respectively. Rectangular waveforms are applied in opposite phase to terminals 81, 82 and are fed to the transistors 1, 2 via transistors 60, 61 respectively, in common emitter connection and differentiating circuits 62, 63. Each of the transistors 1, 2 may be replaced by a number of transistors in parallel and provided with individual emitter circuit resistors.
Patent GB-2007804-A (GB)
Title: A combination fluid by-pass and check valve
IPC: F16K15/06
Filed: 1978-11-08
Abstract: A combination fluid by-pass and check valve (10) includes a check disc (22) positioned in a passage (14) through the valve (10) and movable between an opening and a closing position in relation to a seat (20) of the valve (10). By-pass means (32,34) extend into the valve body (12) and passage (14) and are formed with perforations (35). A sleeve (40) extends from the check disc (22) and telescopically cooperates with the by-pass means (32,34), so that orifices (45) in the sleeve communicate with the perforations (35) in the by- pass means (32,34) when the check disc (22) is in its closing position, thereby permitting flow through the by-pass (32,34), but so that such flow is prevented when the check disc is in its opening position. <IMAGE>
Patent GB-2010657-A (GB)
Title: Cocoa flavoured product and process for manufacturing same
IPC: A23L27/28
Filed: 1978-12-18
Abstract: A roasted yeast product having the characteristic texture, color, flavor, aroma and mouth-feel of cocoa powder is produced by roasting a food yeast at a temperature of about 100`C. to about 300`C. for about 1 to about 50 minutes. The product may be used as a cocoa extender, substitute or replacer in foodstuffs employing cocoa and/or chocolate.
Patent GB-2012269-A (GB)
Title: Process for the production of the magnesium salt of nitro-Armstrong's acid
IPC: C07C301/00
Filed: 1978-12-28
Abstract: A process for the crystallisation of the dimagnesium salt of 3- nitronaphthalene-1,5-disulfonic acid, consists in crystallising 3- nitronaphthalene-1,5-disulfonic acid from the acid reaction mixture of the nitration of 1,5-naphthalene-disulfonic acid (Armstrong's acid) with an aqueous magnesium salt solution at a temperature between 90 DEG and 120 DEG C.