baber/WOPTO huggingface dataset:
Patent GB-763181-A (GB)
Title: Improvements in or relating to preparation of m- and p-diisopropylbenzene
IPC: C07C15/02
Filed: 1954-04-26
Abstract: A diisopropylbenzene substantially free from o-diisopropylbenzene and trimethylindane is obtained by propylating benzene in a first alkylation reaction with a propylene-containing gas which contains no higher molecular weight unsaturates, in the presence of a Friedel-Craft's condensation catalyst to pure cumene, contacting the cumene with about an equimolecular amount of propylene in a second alkylation reaction with 0.1 to 2.0 mols. per cent of aluminium chloride at a temperature in the range of 65-115 DEG  C. until a substantial amount of diisopropylbenzene is formed which is free from o-diisopropylbenzene and subsequently separating m-diisopropylbenzene by distillation.  The propylene-containing gas may be a refinery gas which contains also ethylene, but must be free from butene or butadiene.  The acid acting catalyst may be 80 per cent sulphuric acid, phosphoric acid on kieselguhr, ferric or cupric pyrophosphate, aluminium chloride, zinc chloride, acid delays, hydrogen fluoride, or boron trifluoride.  The percentage composition of the resulting mixture obtaining when the second alkylation is carried out at 100 DEG  C. is benzene 2, cumene 18.5, m-diisopropylbenzene 37.2, p-diisopropylbenzene 18.6, triisopropylbenzene 21.0 and tetraisopropylbenzene 0.6. Specifications 763,179, 763,180 and 763,183 are referred to.
Patent GB-291591-A (GB)
Title: Improvements in or relating to electric resistances and the manufacture thereof
IPC: H01C17/08
Filed: 1927-05-05
Abstract: 291,591. Dicker. S. G. S., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). May 5, 1927. Resistance coatings and deposits. - In a process for the manufacture of electric resistances, particularly suitable as grid leaks, in which a thin layer of conducting material is deposited on an insulator, a tube 1 of insulating material, for example glass, has inserted therein, at definite distances, leading-in wires 4, preferably of ferro-chrome. After exhaustion, a wire or filament 2, preferably of highly refractory metal such as tungsten or molybdenum, is disintegrated as by heating to incandescence. The wall of the tube is thus coated with a layer 5 of definite thickness, after which pro-determined lengths are severed therefrom, the finished resistance being shown in Fig. 2. Severance of the tube is facilitated by forming the tube with contractions 3.
Patent GB-934069-A (GB)
Title: Improvements in or relating to cabinets or cupboards
IPC: A47B95/02
Filed: 1961-04-05
Abstract: 934,069. Cabinets; handles. RADIATION Ltd., and R. W. ATKIN. April 4, 1962 [April 5, 1961], No. 12196/61. Class 52 (1). [Also in Group XIII] The door 4 of a cabinet such as a refrigerator cabinet has a recess produced by rearwardly inclining the top portion 7 and a handle grip formed by a vertical slot 5 in a member 6 is located therein, thus avoiding projections from the vertical surface of the door. A plain-faced member 8 balances the appearance of handle 6. When an upper door 9 is provided to a separate compartment it has a grip bar 10 to which access is provided by the recess in door 4.
Patent GB-1247958-A (GB)
Title: Improvements in or relating to semiconductor devices and methods of making them
Inventor: HIRSHON JACK MYRON
IPC: H01L21/60
Filed: 1969-03-07
Abstract: 1,247,958. Semi-conductor devices. TRW SEMICONDUCTORS Inc. 7 March, 1969, No. 12287/69. Heading H1K. An assembly of semi-conductor devices which is to be sub-divided into individual devices, such as the transistor 10, is formed by providing in a surface of a p(n)-type semi-conductor wafer a plurality of spaced n(p)-type regions, such as 16, providing a protective oxide film 22 over the entire surface apart from where electrodes extend through to the wafer, there being an electrode 26 on each of the spaced n(p)-type regions 16 and a further electrode 36 on the wafer itself adjacent each region 16, and forming a plurality of terminal straps such as 38, 42, one of which is bonded to each electrode 26, 36 along a flat surface of the straps so that all the straps lie in a common plane parallel to the wafer surface but spaced slightly above the surface of the oxide film 22. Separation of individual devices may be effected by scribing the lower surface of the wafer and breaking it, and the provision of grooves 14a, 14b on the upper wafer surface between rows of adjacent devices reduces the danger of the straps 38, 42 shorting on to the edge of the separated disc 12 when it is attached to an insulating circuit board by pressing the free ends of the terminal straps 38, 42 down on to circuit paths on the board and bonding them thereto. The transistor shown also includes an emitter region 18 and a collector contact region 20, all regions being diffused through oxide masks in the Si or Ge wafer. The collector terminal strap 42 is longitudinally parallel to but non-aligned with the base and emitter straps, 38 and not shown respectively, and is interdigitated with the free ends of the base and emitter terminal straps of the adjacent transistor in the reset row. The terminal straps are preferably of Cu, the electrodes being of Al, Au, Ag, Ni, Cu, Pt or alloys thereof. Diodes, controlled rectifiers and integrated circuits are also referred to. The straps may be provided in the form of a metal sheet which is soldered to the electrodes, the sheet being either bonded to a transparent backing sheet of glass or plastics material with the shapes of the terminal straps being selectively etched therein prior to application to the electrodes, or soldered to the electrodes without the use of a backing sheet, the shapes of the straps being determined by selective etching after soldering to the electrodes. In the latter method an etch resist is first applied over the oxide film but not over the electrodes, the resist being removed after the straps have been shaped. Alternatively the straps may be shaped by selectively etching a thin metal film deposited over the oxide surface which is covered with a resist, the film bonding directly to the electrodes. Selective deposition of a metal film may similarly be used.
Patent GB-813155-A (GB)
Title: Panelling for ceilings particularly of plaster
IPC: E04B9/22
Filed: 1957-04-16
Abstract: 813,155. Ceilings; panels. BIGONTINA, G., and BIGONTINA, G. April 16, 1957 [April 17, 1956; Dec. 12, 1956], No. 12329/57. Classes 20(4) and 87(1) In a panelled ceiling, particularly of plaster, each panel is reinforced by an embedded wire 5 and provided, on at least two sides thereof with double hooks, preferably of sheet metal, one hook 7 being embedded in the panel and engaging the wire 5 and the other hook 8 projecting from the panel being hooked on to suspension fittings anchored in a ceiling supporting frame. A horizontal projection 9 of each double hook extends from the side of the panel. As shown, two adjacent sides of a panel each have a recess 1 and projecting tongues 2 whilst the two opposite sides are each formed with a flange 3 and grooves 4, the latter for accommodating the tongues 2. The wire frame reinforcement is braced by diagonals 6 of wire and the horizontal projections 9, Fig. 4, are formed with bentover portions 10 which engage within the U-shaped parts of hooks 11 embedded in the grooved edges of the panels. In a modification, the upper hooks 20, Fig. 5, of the double hooks 18 engage suspended T-shaped stringers 14.
Patent GB-331020-A (GB)
Title: Improvements in or relating to door manipulating mechanism particularly for use on washing machines
IPC: D06F37/10
Filed: 1929-04-20
Abstract: 331,020. Armstrong & Co., Ltd., J., and Williams, J. April 20, 1929. Hasp fastenings; fastenings for hinged doors. -The doors of washing machines are provided with a clamping device comprising a plurality of tensioning clamps spaced along the free edge of the door, each comprising a catch upon the jamb or upon the door and a link pivoted to the door or the jamb, and adapted to engage the catch, the clamps being mounted upon a shaft which, when manipulated, provides for the tensioning of the clamps simultaneously. As shown, the hinged door 12 of a rotary washing cylinder 10 is provided with two clamps carried by a shaft 14, each clamp comprising a crank 16 with a link 17 having at its free end a crosspin 18 adapted to engage a semicircular catch or pivot 19 upon the jamb. The link 17 is adjustable in length, as shown. The shaft 14 is rotated by means of hand levers 22, and a spring catch 23 serves to retain the clamps in the closed position. In securing the door the connecting links are swung downwards until the cross-pins 18 engage the catches 19, and by means of the handles 22 the cranks 16 are then turned away from the catches and beyond their dead centres.
Patent GB-295344-A (GB)
Title: Improvements in apparatus for cleaning the tubes of water tube boilers, feed heaters and the like
IPC: F28G1/16
Filed: 1927-05-09
Abstract: 295,344. Parry, C. P. May 9, 1927. Cleaning, fluid-pressure processes for. - A steam blower of the Parry type for water-tube boilers, feed-heaters, &c. designed to deal with remote parts of the boiler &c. has the pipe D, Figs. 4 and 6, connecting the jet tube E with the rotatable casing H through which steam is admitted so arranged as to be subjected only to low pressures, a pressure-reducing de Laval nozzle R and a pressure-increasing de Laval nozzle P being provided at the two ends for this purpose. A spherical bearing M at the junction of the pipes D, E allows a certain amount of play. Specification 131,137 is referred to.
Patent GB-1502524-A (GB)
Title: Bulk material handling apparatus for conveying granular material by endless belts
IPC: B65G15/60
Filed: 1976-03-29
Abstract: 1502524 Conveying material between opposed endless belts ALLIS-CHALMERS CANADA Ltd 29 March 1976 [2 April 1975] 12461/76 Heading B8A The edges of opposed endless belts 10 and 12 are held between opposed sets of rollers 46 and 47, the rollers of the two sets being disposed in staggered relation.
Patent GB-368577-A (GB)
Title: Improvements in flyer spinning machines
IPC: D01H1/10
Filed: 1931-04-28
Abstract: 368,577. Flyer spinning -machines. FERIER, B., 4, Rue Vaucanson, Lyons, France. April 28, 1931, No. 12473. Convention date, June 20, 1930. Addition to 345,504. [Class 120 (ii).] In the flyer apparatus adapted to impart two twists to the material per revolution described in the parent Specification, wherein the bobbin is driven by a drum actuated through variable-speed gear and, together with the traverse gear, is arranged inside the flyer and driven from the flyer spindle, the traverse is effected by a double-threaded screw operated by a change-speed gear controlled by means operable from the outside of the casing, the yarn is led from the central spindle through a stationary guide, and the flyers are mounted in staggered rows in the machine, the delivery of the yarn from the supply bobbins being controlled. The central spindle 3 drives a nest of gears 7, from which a gear 11 coupled by change gears with the bobbin-driving roller 16 is driven through a wheel 9 splined on a shaft 8 which is carried by a pivoted frame 12, the wheel 9 being moved as required by an arm 23 provided with a handle 13 adapted to be moved along a graduated scale 28 in the casing. The bobbin-driving roller 16 is geared with the double-threaded traverse screw 35 which is engaged by a yoke carrying the thread guide arm 44. A stationary guide 48 is mounted in the casing opposite the exit from the central spindle so that the yarn is not subjected to contact with a rotating surface and glazing of the yarn is prevented. A guide is provided in the usual disc 51 secured to the spindle, and a ring 52 pivoted at 53 is provided to prevent the yarn from fouling the mechanism when starting up. The flyers are mounted in staggered relationship in rows on a central framework, as shown in Fig. 7, and are all driven by a single belt 59, each spindle being provided with a brake block operated through an eccentric by a handle. The yarn may be drawn from stationary bobbins 77, or from rotary bobbins 64 which are mounted in pairs on brackets 65, and the delivery is controlled by wires 67 engaged by the yarn and coiled around a spindle 68. Each wire is connected to a brake pad adapted to engage a drum on the delivery bobbin and adjusted by setting the wire in the notches of a sector 70. A yarn drag or check device may be used when unwinding from stationary bobbins in substitution for or in addition to the compensating and braking arrangement.
Patent GB-963183-A (GB)
Title: Improvements in and relating to vacuum cleaners
IPC: A47L5/36
Filed: 1963-03-29
Abstract: 963,183. Suction cleaners. ELECTROLUX Ltd. March 29, 1963 [April 3, 1962], No. 12501/63. Heading A4F. [Also in Division B1] In a suction cleaner comprising two housing parts 11, 12, enclosing a dust collector and a fan motor unit, respectively, the dust collector comprises a perforated container or a rigid frame 37, 38 carrying a filter 39, clamped between a wall 19 of the part 12 and the end wall 41 of the part 11. The end of the frame 37, 38 may be oval and a paper filler (not shown) may be clamped between it and an elastic ring 44 in a groove in the wall 41.
Patent GB-963546-A (GB)
Title: Friction coating and method of making the same
IPC: C23C4/08
Filed: 1961-04-07
Abstract: A wear resistant surface is formed by brazing a layer of refractory particles such as WC, TiC, TaC, SiC, B4C, Al2O3 and MgO with a particle size greater than 1/16 inch, to a backing member such as nickel or "Inconel" (Registered Trade Mark) and flame spraying or sintering a matrix layer over the refractory particles.  The refractory particles with a particle size of 1/16 -\ba1/8 inch are brazed to the backing with copper powder and a flux by heating in cracked ammonia to 2100  DEG F.  The flame sprayed matrix may be a powder mixture of 90% Cu/10% Ni or a powder mixture of 52.5% Ni, 13.8% Cr, 0.75% B, 2.28% Si, 0.67% Fe and 30% WC.  Alternatively the powdered matrix may be applied by pressing and sintering.
Patent GB-1396478-A (GB)
Title: Driving belts
IPC: F16G5/00
Filed: 1973-03-15
Abstract: 1396478 Belt gearing HOXTERSCHE GUMMIFADENFABRIK EMIL ARNTZ KG 15 March 1973 [20 March 1972] 12515/73 Heading F2Q In a drive belt comprising a plurality of generally wedge-section elongate continuous bodies 2, 3, 4, 5 and a continuous elongate web 6 interconnecting the bodies, the web 6 incorporates a fibrous layer 11 at least 50% of the fibres of which are orientated in a selected direction, preferably at an angle of from 45 to 90 degrees to the length direction of the belt. The web 6 comprises a fibrous layer 11 of polyamide, polyester or cotton fibres embedded between elastomer layers 12. In a modification, the web comprises an additional fibrous layer, the predominant directions of fibre orientation being either the same or at an angle to one another.
Patent GB-400958-A (GB)
Title: Improvements in and relating to the manufacture of sliding clasp fasteners
IPC: B29D5/02
Filed: 1932-05-03
Abstract: The stringers of sliding-clasp fastenings are formed by casting the fastener elements on to the edge of a tape projecting into the mould, the casting material being thermoplastic and being injected in a heated condition, so as to be liquid or plastic, into the mould which is water-cooled to effect the solidification of the material. Suitable materials are cellulose acetate, ethyl cellulose, benzyl cellulose, or thermoplastic resin powder containing suitable plasticizers.  With a simple two-piece mould the fastener elements can only be made with ridge interlocking parts but by subsequent treatment with a heated tool the usual projection-and-socket interlocking can be achieved. Alternatively the mould described in Specification 395,708 may be used.
Patent GB-1095256-A (GB)
Title: Determining charge levels
IPC: C21B7/24
Filed: 1965-03-25
Abstract: 1,095,256. Optical gauging. CENTRE NATIONAL DE RECHERCHES METALLURGIQUES. March 25, 1965 [April 2, 1964], No.12789/65. Heading G1M. In a method of determining the surface level 16 of a charge in a blast furnace or other enclosed space, an optical telemeter 4 is employed in which two images, observed through eye-pieces 11, 13, are brought into coincidence so that the distance of the charge 16 from the eye-piece 11 may be derived by measuring the angle 15. The whole device moves about the axis 5 to increase its range of operation. The telemeter may be positioned behind a porthole, which, in the case of a blast furnace, is fluid cooled.
Patent GB-527829-A (GB)
Title: Improvements in screw thread grinding machines
IPC: B24B19/02
Filed: 1939-04-15
Abstract: 527,829. Screw-thread grinding-machines. HOPKINSONS, Ltd., and METCALF, T. April 15, 1939, No. 12846/40. Divided out of 527,785. Drawings to Specification. [Class 60] Comprises a thread grinding machine with a gauge for positioning a prethreaded workpiece relative to a grinding wheel or wheels as described in Specification 527,785.
Patent GB-234137-A (GB)
Title: Improvements in two-stroke cycle internal combustion engines
IPC: F01L7/02
Filed: 1924-03-31
Abstract: 234,137. Zoller, A. March 31, 1923, [Convention date]. Valves; regulating. - Mixture, admitted through a rotary valve v, Fig. 1, and pistoncontrolled ports of a, two-stroke engine, is supplied by additional pumps to those supplying scavenging-air through ports c. The valve v also controls exhaust at a, the timing of which may be varied, preferably simultaneously with adjustment of the inlet throttle i, Fig. 2, to the scavenging-air pump k, by axial movement of a sleeve n having helical engagement with the wheel g<2> driving the valve v, or by adjustment of a sleeve p, Fig. 6, surrounding the valve. The Specification as open to inspection under Sect. 91 (3) (a) describes a modification, in which exhaust is controlled by rotary sleeve valves surrounding ports in the upper ends of the cylinders and driven by bevel gearing 1 - - 4, Fig. 4 (Cancelled), timing being varied by adjustment of the carrier 5 of the intermediate pinions 2 about the axes of the driving and driven shafts 1, 3. A pinion on the shaft 3 gears directly with the sleeve valves. This subject-matter does not appear in the Specification as accepted.
Patent GB-560012-A (GB)
Title: Improvements in or relating to means for reading the indication of measuring instruments
IPC: G01R1/02
Filed: 1942-09-12
Abstract: 560,012. Electric signalling systems. STANDARD TELEPHONES & CABLES, Ltd., and HARTLEY, G. C. Sept. 12, 1942, No. 12853. [Class 40 (i)] [Also in Group XIX] The position of the pointer of an instrument such as a voltmeter or micro-ammeter is determined by the passage of a spark between an electrode carried by the pointer and one of a series of fixed electrodes, thereby ionising a cold-cathode discharge tube. As shown in Figs. 1, 2, the pointer N carries on the end of a glass filament I a U-shaped electrode BR of which the limbs co-operate with a feeder ring FR and segmental electrodes V ... Y, the latter being connected to discharge tubes A ... D. The opening of a switch S applies a high voltage to the feeder ring FR from a spark coil TR so that a spark jumps the gaps and ionises the appropriate discharge tube, operating an anode relay AA ... DD. The tube is extinguished by means of a relay contact Z. In Fig. 3, a single discharge tube A is connected to the segmental electrodes in turn by a rotary switch U, which is stepped by impulses received by a relay IP until the position of the pointer N is found, when the operation of the anode relay AA stops the switch. The relay IP also controls the spark coil TR. The stepping impulses may come from a distant station to which the position assumed by the switch U may be signalled in known manner. Alternatively, the spark coil TR may be arranged to provide sparks at regular intervals for checking the position of the pointer.
Patent GB-990751-A (GB)
Title: Improvements in or relating to structural assemblies, in particular shelving units, and joints or couplings therefor
IPC: A47B55/02
Filed: 1962-04-04
Abstract: 990,751. Shelving; furniture joints. L. MASLOW. April 4, 1962, No. 12956/62. Headings A4B and A4W. In a shelf or other furniture assembly spaced vertical frames 16, 17 each comprise parallel pairs of supports 18, 19 and shelves comprise parallel equally spaced ribs 10 welded to transverse rods 11, 12, 13, the front and rear edges being formed by pairs of spaced ribs 14, 15. Coupling devices 23 each comprise a semi-circular socket 24 to receive a support 18 or 19 and integrally joined to the socket 24 is a channel section 25 which embraces ribs 14, 15, a tab 28 with neck 29 and head 30 being provided at the other end.
Patent GB-547379-A (GB)
Title: Improvements relating to postal envelopes
IPC: B65D27/06
Filed: 1941-10-08
Abstract: 547,379. Reply envelopes. WADE, W. L. Oct. 8, 1941, No. 12973. [Class 146 (ii)] A reply envelope 1 has a closing flap 2, covering substantially the whole of the envelope and weakened only along a line about midway between the edge and the fold 7, the part 3 remote from the hinge being gummed. The weakening may consist of a row of perforations 4. The envelope on first use has the flap tucked in, on second use the flap is gummed down and slit along line 4 when opened and on third use the flap remnant is again tucked in. One or both lateral edges of the flap are slightly cut away so that the postage stamp seals the ungummed part. The envelope may have an additional narrow flap 12, Fig. 2, which is retained in place during the first use by light gumming or by engagement with the side flaps of the envelope. This flap 12 may be tucked in on a later use or it may be torn off after first use, merely carrying the first stamp. The flap 12 may be divided by slits at rightangles to the fold 7, the centre section 16, Fig. 7, being used for first use and the end sections 16a, 16b for third use. The gumming 2 may be extended along the side edges to prevent pilfering. An additional flap may be formed by an extension of the envelope wall. Adhesive, which may be selfsealing, may be provided along the envelope and flap 2 near the fold to prevent pilfering, being stopped short of the edges to facilitate opening. The invention may be applied to window envelopes.
Patent GB-865912-A (GB)
Title: Process for the production of photographic records having a relief image
IPC: G03C7/00
Filed: 1957-04-23
Abstract: 865,912. Photographic relief images. CIBA Ltd. April 23, 1957 [April 24, 1956], No. 12984/57. Drawings to Specification. Class 98(2) A multilayer transparent record of which one layer contains a variable density image and another layer a corresponding relief image is made by forming the first mentioned image in a photographic material and exposing therethrough to a layer of light-sensitive relief-forming colloid material which may have been present before formation of the variable density image or else applied after such formation and to either side thereof. Bichromate procedure may be used for relief production, and if desired a water-repellent layer may be provided over the variable density image to protect it during the washing operation. These double images show better edge sharpness when projected or printed, especially with light of small aperture as described in Specifications 865,186 and 865,913. Examples are directed to (1) coating of a gelatin layer on to the emulsion side of a metol-hydroquinone developed image, bichromate sensitisation; ultra violet exposure for one minute, warm water treatment and re-development of the original image, (2) similar procedure but apparently starting from a dyestuff image and omitting the re-development, (3) provision of a gelatine-acetic acid substratum on to the uncoated side of an imbibition print, a gelatin layer on this and similar bichromate operation, and (4) provision of a nitrocellulose lacquer layer on the coated side of an imbibition print, a subbing coating thereon and then the gelatinebichromate production of relief. Use of a diazo compound for the purpose is mentioned but not further described.