baber/WOPTO huggingface dataset:
Patent GB-712735-A (GB)
Title: Improvements in producing asteriated corundum crystals
IPC: C30B29/26
Filed: 1952-11-26
Abstract: 712,735. Artificial gems. UNION CARBIDE & CARBON CORPORATION. Nov. 26, 1952 [Dec. 28, 1951], No. 29883/52. Class 43 In making artificial gems-such as rubies and sapphires, a single crystal of corundum is rendered capable of asteriation through the precipitation of rutile upon subsequent heating, by subjecting the crystal to a preparatory heating at a temperaturebetween 1700‹C and 1950‹C while maintaining a titanium compound in contact with its. surface, whereby some of the titanium compound is diffused into the crystal. The preparatory heating is carried out for at least one hour, the length of the heating period being varied in inverse relation to the temperature, and preferably being for between eight and twenty-four hours, Contact with a titanium compound during the preparatory heating may be effected by embedding the crystals in a mixture comprising titania, or the crystals may be coated with an aqueous mixture which contains titania and is allowed to dry upon the crystal surface prior to the preparatory heating. A suitable aqueous mixture contains 30-40 per cent titania and 60-70 percent alumina. The process may be employed for improving poorly asteriated corundum crystals, and is applicable to corundum crystals of any shape, such as rough natural crystals, or whole or half boules of synthetic corundum, the most desirable products being obtained by treating cabochon gemstones which have been cut from larger crystals of natural or synthetic corundum.
Patent GB-1440520-A (GB)
Title: Synchronous electric motor
IPC: H02K21/14
Filed: 1973-06-22
Abstract: 1440520 Core constructions SIGMA INSTRUMENTS Inc 22 June 1973 [26 June 1972] 29889/73 Heading H2A The rotor 15 of a synchronous electric motor comprises a plurality of axially magnetized, annular permanent magnets, 16, 17, disposed between, and abutting, respective pairs of axially spaced, annular, toothed, rotor polepieces, 16a, 16b, 17a, 17b, the axial thickness of each magnet being less than its radial thickness, there being a spacer, 25, between adjacent pole pieces of different magnets, the magnets, polepieces and spacers being secured to each other and to a shaft 13. The polepieces of the rotor shown are laminated and are secured together, to the magnets, the spacers and to the shaft by epoxy resin cement. The teeth on the two polepieces of each magnet may be angularly staggered by half the tooth pitch.
Patent GB-904218-A (GB)
Title: Pick-up arm assembly for sound reproducing machines
IPC: G11B3/34
Filed: 1958-09-18
Abstract: 904,218. Supporting gramophone pick-ups. THORENS S.A. Sept. 18, 1958 [Sept. 23, 1957; Aug. 26, 1958], No. 29964/58. Class 40 (2). A parallel-linkage mass-balanced pick-up arm allows movement of the pick-up only in the vertical plane containing the turn-table axis, the pick-up thus being maintained at all times tangential to the record groove. The linkage comprises two deformable parallelograms P 1  and P 2  whose parallel action is linked by an element 25 common to both. Separate balance masses 21, 22 for each parallelogram and a torsion spring (Fig. 3, not shown), acting in the direction f about the pivot 11 provide for stylus pressure on the record. A handle 33 enables the pick-up to be lifted clear (see dotted lines) for record-changing. In a further embodiment (Figs. 4-11, not shown), the pick-up is lifted just clear of the record and lowered gently thereonto by a lever which tilts the pillar outwardly in the operative plane of the linkage. The invention specifies that for optimal results from warped records, a perpendicular from the pivot 8 falls inside the maximum playing radius and that at this radius, the member 14 makes an angle with the record not exceeding 45 degrees.
Patent GB-207815-A (GB)
Title: Improvements in apparatus for detecting subaqueous sound signals
IPC: G01S1/72
Filed: 1923-11-28
Abstract: 207,815. Atlas - Werke Akt. - Ges. Nov. 28, 1922, [Convention date]. Detecting subaqueous sounds; sound, controlling and actuating apparatus by.-Sounds of a particular frequency actuate an audible or visible indicator by initiating oscillations of that frequency in an electrical circuit which is adapted to maintain the oscillations when once they have been started. The device may be used as an alarm for calling an operator's attention to the receipt of signals, or to the proximity of a danger point provided with a subaqueous sound source. The oscillation may be automatically stopped when the indicator has been actuated, and in this case the signals may be recorded. A microphone 3 is connected in circuit with an electromagnet 5 which reacts on the microphone diaphragm 1, a condenser 7 being connected either in series or, as shown, in parallel with the electromagnet so as to form with the inductance 6 a resonant circuit tuned to the required frequency. When sound waves of that frequency are received by the diaphragm 1, oscillations are set up which are thereafter maintained by reaction, and actuate an indicator through the coupling 8. In a modification, not shown, the sound may impinge on a second microphone setting up electric oscillations which, after amplification, are communicated to a circuit similar to that shown in Fig. 1. In the modification shown in Fig. 3, the plate circuit of a thermionic valve contains a bell or other indicator 30 and is coupled at 29, 22 to the grid circuit which is tuned to the required frequency and is coupled through an amplifier 21 to the circuit of the sound detector 19. Sounds of the required frequency set up oscillations which are thereafter maintained provided the grid potential be suitably adjusted. The oscillations may be checked, on the operation of the indicator, by a relay which short-circuits the coil 29.
Patent GB-498709-A (GB)
Title: Improvements in or relating to the diffusion of incombustible dust in mines
IPC: E21F5/00
Filed: 1937-11-03
Abstract: 498,709. Preventing fire by diffusing dust. NEW SHARLSTON COLLIERIES CO., Ltd., and BARKER, P. D. Nov. 3, 1937, No. 30098. [Class 47 (ii)] [Also in Group I] A device for diffusing stone or other inert dust in the atmosphere of mines, consists of a container A for the dust, and a bell-like closure C which rests on the dust and is free to descend in the container as the level of the dust therein descends. Compressed air is supplied to the container by a flexible pipe D, and a cloud of dust is expelled by the air pressure through apertures E in the closure. The container has handles B for carrying purposes.
Patent GB-519474-A (GB)
Title: Air heaters for blast furnaces
IPC: C21B9/00
Filed: 1938-10-18
Abstract: 519,474. Regenerators. SCHWARZE, P. Oct. 18, 1938, No. 30099. Convention date, Oct. 21, 1937. [Class 64 (i)] An air heater for a blast furnace consists of superposed hollow bricks 6 forming alternate vertical air and gas passages. Gas and air for combustion are admitted through an opening 1 in a casing around the brickwork and the products of combustion pass from a dome at the top of the casing downwards through the brickwork to an outlet 3. The air enters the brickwork through an opening 2 and flows upwards through the passages and then downwards to an outlet 7. The ends 9 of the gas passages extending through the air admission and outlet chambers may be made of metal. The passages in the bricks may be coated with silicon carbide. The bricks may have passages formed as described in Specification 493,608, [Group XII].
Patent GB-700688-A (GB)
Title: Improvements in or relating to gas-turbine engines
Inventor: LOMBARD ADRIAN ALBERT
IPC: F04D27/02
Filed: 1950-12-08
Abstract: 700,688. Gas turbine plant; axial flow compressors. ROLLS-ROYCE, Ltd. Nov. 30, 1951 [Dec. 8, 1950], No. 30153/50. Classes 110 (1) and 110 (3) In a gas turbine engine employing an axial flow compressor connected to the combustion chamber or chambers by an annular diffuser having inner and outer walls 15, 16 connected by axially extending hollow radial struts 17, the struts are provided with air inlet apertures 25 and an outlet connection 32 is provided whereby air may be tapped from the interior of the struts. The struts communicate at their downstream ends with an annular manifold 29 formed by a part 28 bolted to a flange 26 and in sealing engagement with a flange 27, both flanges being formed on the inner wall of the diffuser. The diffuser is secured to an annular combustion chamber provided with an annular flame tube or with a series of tubular flame tubes 23 arranged between, and axially overlapped by, the struts 17. The uostream ends of the flame tubes may be supported as described in Specification 686,383, [Group XII]. Alternatively a number of separate tubular combustion chambers may be provided, the downstream end of each strut dividing to provide a side wall of each of two adjacent branch connections to adjacent chambers. The interior of a strut may be divided into two or more chambers and those through which air is not tapped off may be used as breather passages for the interior of the engine, or to permit passage of auxiliary drive shafts. In the modification shown in Fig. 4, the manifold is cast in one with the diffuser. It is divided into downstream and upstream portions 52, 51 by a circumferential rib 53a and these portions may be further subdivided by axial ribs 58, Fig. 7. The hollow struts are divided into chambers 48, 49 by partitions 50 and the air inlet apertures 55 are in some struts on the downstream side, and in others on the upstream side of the partitions. Certain struts have tapping outlets 57. Air inlet anertures may be nrovided in the leading edge of the struts and outleak apertures may be provided on the trailing edges.
Patent GB-1109645-A (GB)
Title: A method and apparatus for the treatment of a web of material
IPC: B01J3/04
Filed: 1965-07-16
Abstract: An autoclave for the treatment of textile materials e.g. by bleaching, steaming, drying or dye-fixing, comprises an inlet and an outlet chamber each at a pressure slightly above atmospheric and on high pressure chamber, each chamber having pressure sealed inlet and outlet apertures for the continuous passage of material through the autoclave.  The inlet chamber and the after-treatment or outlet chamber may be releasably attached to the high pressure chamber in order that supply and take-up rolls for the material may be positioned in the chambers.  The sealing means for the inlet apertures comprises symmetrical, resilient plastic lip pieces each having one end attached to the wall of the respective chamber by means of rails, and the free ends abutting forming a wedge-shaped space between the pieces, Fig. 4 (not shown).  The seal of the outlet aperture of the after-treatment chamber includes additional lip pieces each having one end engaged between the abutting ends of the first mentioned lip pieces, and the other ends attached to freely rotatable sleeves, forming a wedge-shaped mouth therebetween, Fig. 5 (not shown).  The inlet chamber may include impregnating means, for the pre-treatment of the textile material, Fig. 2 (not shown).  The autoclave may be vertically positioned with the respective chambers one above the other, Fig. 3 (not shown).
Patent GB-638227-A (GB)
Title: Improvements in or relating to electrostatic precipitators
IPC: B03C3/40
Filed: 1947-11-14
Abstract: 638,227. Electrostatic precipitation. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Nov. 14, 1947, No. 30289. Convention date, Nov. 26, 1946. [Class 39 (i)] In an electrostatic precipitator, having separate ionizing and precipitation electrodes, ionizing electrodes 23 of relatively large diameter curved cross-section, extend between spaced vertical walls 13, 14 of a casing 5 and relatively small diameter ionizing wires 20 pass through openings 22 in the walls 13, 14 between the ionizing electrode 23 and are supported at their ends by insulators 18 located outside the walls 13, 14. The insulators 18 are mounted on flanges 17 secured to the outer sides of the walls 13, 14. The ionizing wires 20 are attached directly to one of the supports 19 mounted on an insulator 18, and through springs to the other support 19. The electrodes 23 contact the upper ends of the walls 13, 14 in arcs of similar diameter. The edges of the openings 22 which are semicircular, are rounded so that the strength of the ionizing field is not reduced around the wires 20 where they pass through the openings 22. The insulated plates 31 of the precipitation electrodes 25, 31 are attached to bolts 26 which extend through openings in the walls 13, 14 and are attached to supports 37 mounted on insulators 28, 29. Resilient members 34 which grip a blade 11 forming the connection to a high voltage source, are secured to a plate 30, to which one of the supports 37 for the insulated plates 31 is attached. The gas is drawn into the casing 5 through a grille in a hinged cover 6.
Patent GB-171997-A (GB)
Title: Improvements in and relating to aluminium alloys
IPC: C22C21/02
Filed: 1921-11-15
Abstract: 171,997. Aluminum Co. of America, (Assignees of Archer, R. S., and Edwards, J. D.). Nov. 27, 1920, [Convention date]. Alloys.-Aluminium alloys containing substantial proportions of silicon, for example 3-15 per cent, are cast under such conditions as to ensure rapid cooling, for example in a chill mould, in order to improve the strength and ductility. The iron content preferably does not exceed 0.6 per cent. Other metals such as copper and zinc may be added. Alloys containing (1) 8 per cent of silicon and 2 per cent of copper, (2) 6 per cent of silicon, 3 per cent of copper, and 12 per cent of zinc, and (3) 8 per cent of silicon, 1 per cent of copper, and 5 per cent of zinc, are described. The addition of alkali metals, as described in Specification 171,996, is also referred to.
Patent GB-1067855-A (GB)
Title: Fuel cells with sintered electrodes
IPC: H01M4/88
Filed: 1964-08-04
Abstract: A fuel cell comprises a porous sintered electrode made by co-precipitating at least two of the metals of group 8 and sub group 1b of the Periodic system such as Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Cu, Ag and Au, as reducible or decomposable compounds from a common solution, the mixed precipitate is reduced or decomposed to the metals which are then pressed and sintered. The common precipitating solution preferably consists of an aqueous solution of the nitrates of the metals, although an organic solvent may also be used, and 1-3 mols of the precipitating reagent are added.  The following reagents may be used:-Formic acid, acetic acid, oxalic acid, malonic acid, succinic acid, citric acid, phthalic acid, naphthenic acid, polyacrylic acid, carbonic acid and their alkali metal or ammonium salts.  Aqueous alkali metal hydroxides may also be used.  The precipitate which is preferably an oxalate is reduced at 200 DEG -700 DEG C. m hydrogen, treated with water, dried, pressed and sintered at about 450 DEG C. in an inert atmosphere or hydrogen.  The metal compounds may be precipitated on metal, metal oxide or metal salt powders which are in suspension in the precipitating solution and act as supporting skeletons for the catalyst metal. For double layer electrodes a particle size of 40-70 microns is used for the working layer, a size of less than 40 microns for the covering layer and a size of about 60 microns for the supporting skeleton.  A blowing agent such as ammonium carbonate may be mixed with the powder prior to sintering.  The precipitated mixed metal catalysts may also be mixed with Ni or Ag prior to pressing and sintering.
Patent GB-391508-A (GB)
Title: Improvements in and relating to the manufacture of polyhydricalcohol-polybasic-acid condensation products
IPC: C08G63/46
Filed: 1931-11-04
Abstract: Drying-oil-modified-polyhydric-alcohol-polybasic acid condensation products are prepared by heating together a drying oil, colophony in amount greater than 15 per cent by weight of the oil and a polyhydric alcohol in an amount greater than that necessary to esterify the colophony until the mixture becomes homogeneous and then condensing the product with a polybasic acid or anhydride.  The products, with or without pigments, may be dissolved to give varnishes and used as undercoats for nitrocellulose lacquers.  They may also be used in conjunction with cellulose esters.  In examples glycerol, tung oil, linseed oil or blown linseed oil and colophony are heated together and condensed with phthalic anhydride.  Specification 316,914, [Class 2 (iii), Dyes &c.], is referred to.
Patent GB-873042-A (GB)
Title: Improvements in energising control systems for electromagnets
IPC: H01F7/18
Filed: 1959-09-09
Abstract: 873,042. Switching systems for electromagnets. BROOKHIRST IGRANIC Ltd. Sept. 9, 1959 [Sept. 23, 1958], No. 30774/59. Class 38 (4). In a circuit whereby electromagnetic devices 5, 6 are connected normally in series but initially in parallel to obtain rapid energization, a rectifier 9 is connected between them so that the circuit is not broken by the transition. The parallel connection is effected through contacts 2M2, 2M3 operated by a relay coil 2M1 which is de-energized by a relay TR1-TR3 after a determined time delay. In a modification, an additional contact 3M4 (Fig. 2, not shown) is closed to shunt the rectifier 9 after the paralleling contacts have opened.
Patent GB-906107-A (GB)
Title: A sawtooth voltage generator
Inventor: RATAJ MIROSLAV
IPC: H03K4/12
Filed: 1959-09-09
Abstract: 906,107. Valve sawtooth generating circuits. TESLA NARODNI PODNIK. Sept. 9, 1959, No. 30794/59. Class 40 (6). In a sawtooth generator of the type in which a capacitor C is charged via a resistor Rn1 and discharged via a switching valve E1, the basic voltage level Uc2 is stabilized by negative feedback via a D.C. amplifier, the feed-back being inhibited during the flyback period. As described, valve E1 is normally conductive so that the basic output voltage at the anodes of valves E2, E3 is stabilized by negative feed-back via a potential divider R1, R2. Valve E1 is out-off by a negative switching pulse fed to the suppressor grid at time T1 so that capacitor C charges via resistor Rn1. The negative switching pulse ends at T2 so that capacitor C discharges via E1 towards the cathode voltage Uv. The feed-back is inhibited by grid current in E1 until potential Uc2 is reached when the grid current ceases and the voltage level is maintained by the action of negative feed-back.
Patent GB-244456-A (GB)
Title: Improvements relating to the low temperature distillation of bituminous substances
IPC: C10B29/02
Filed: 1925-12-05
Abstract: The Specification as open to inspection under Sect. 91 (3) (a) states that the parts of the metal walls of a retort that are exposed to the chemical influences of the retort gases or vapours are protected by providing them with a resistant metal coating, which may consist of aluminium or its alloys applied by spraying, electrodeposition, or other known means.  This subject-matter does not appear in the Specification as accepted.
Patent GB-796327-A (GB)
Title: Recovering synthetic phenol and other components of cumene hydroperoxide cleavage mixture by distillation
IPC: C07C37/08
Filed: 1954-10-26
Abstract: Crude phenol, obtained by oxidation of cumene and subsequent acid-catalysed decomposition of the peroxide compound, is subjected to fractional distillation to remove acetone, and the acetone-free mixture is then subjected to fractional distillation under vacuum and in the presence of water to distil off overhead a mixture of cumene, a -methyl styrene and water, which is substantially free of phenol; the head product is condensed and separates into an aqueous phase and an oil phase, and a major part of the aqueous phase and a minor part of the oil phase are returned to the fractionating column as reflux, whereby an adequate concentration of water is maintained in the lower sections of the column, so that condensation of phenol with methylstyrene, and the poly <PICT:0796327/III/1> merization of the latter, are avoided.  Pure phenol is then separated by distillation from the mixture obtained at the sump of the vacuum column.  Reaction mixture is pumped from container 1 into column 4; and water is introduced, if desired, through pipe 3.  The temperature at the sump of th column is maintained at 100-105 DEG  C. by heater 5, the pressure at this point being 900-1000 mm. Hg.  Acetone is obtained at the head of column 4. The mixture withdrawn from the sump of column 4 is pumped to column 8 which is maintained under vacuum by pumping-means joined to condenser 9 at connection 10.  Water is introduced into the head of column 8 through pipe 13.  An azeotropic mixture of cumene + methyl styrene + water is distilled off from column 8 at a temperature of 60 DEG  to 85 DEG  C.  The condensate forms an aqueous layer and an oily layer in separator 11.  The aqueous layer is introduced through pipe 12 into the head of column 8.  The oily layer is collected in container 14; part of it is pumped to column 8 as reflux, and the remainder is introduced into vacuum-column 17.  Cumene is withdrawn from the head of column 17; and methyl styrene is obtained at the base.  The mixture obtained in the sump of column 8 is introduced on to the top plate of column 24. Water-vapour is driven out of the mixture as it descends column 24; and this vapour is passed through pipe 26 into column 8.  The water-free mixture, withdrawn from the sump of column 24, is pumped into vacuum-column 28.  Substantially pure phenol is obtained at the head of column 28.  The residue flowing from the base of column 28 is pumped to vacuum-column 33.  A mixture of phenol and acetophenone is obtained at the head of column 33; while the residue, which is discharged from the base, contains cumyl phenol.  In a modification the liquid withdrawn from the sump of column 8 is allowed to separate into two layers, viz. an aqueous layer containing phenol and an oily layer containing acetophenone, and these two layers are worked up separately. Specification 770,650 is referred to.
Patent GB-895369-A (GB)
Title: Calculating machine
IPC: G06C29/00
Filed: 1960-09-08
Abstract: 895,369. Electric selective signalling. NATIONAL CASH REGISTER CO. Sept. 8, 1960 [Sept. 17. 1959], No. 30966/60. Drawings to Specification. Class 40 (1). [Also in Group XIX] Decimal digits are sensed from a punched paper tape, each digit being represented in a 2-out-of-5 code. The digits are entered in turn into five relays the contacts of which are connected to mark one out of ten leads. A first stepping switch finds the marked lead and the digit registered is converted in a diode network back to a two-out-of-five code which is entered in five relays. Contacts of these relays aro connected with contacts of five relays set in parallel with the first-mentioned relays by the input tape so as to make a checking comparison. If there is agreement the relays reset and a second digit read from the tape is registered in the same way in a second stepping switch. A third digit follows this. The checking circuit of relay contacts also checks that two out of the five input relays have in fact been set. Specifications 852,827 and 867,293 are referred to.