baber/WOPTO huggingface dataset:
Patent GB-1049671-A (GB)
Title: Production of semiconductor devices
Inventor: HILSUM CYRIL
IPC: H01L21/18
Filed: 1963-02-04
Abstract: <PICT:1049671/C4-C5/1> A semi-conductor radiation emitt ng diode comprises a body of an AIIIBV compound doped with carbon, silicon or germanium to give a donor concentration of at least 6x1017 atoms cm.-3.  Ingots of gallium arsenide and an amount of silicon equal to 3.8% of the weight of the gallium are melted together in a silica or carbon boat.  Slices are cut from the resulting N-type ingot and are lapped and etched.  Zinc is diffused into the slices from the vapour phase to form P-type surface layers.  The P-type layer on one face of each slice is removed by lapping and this face is then polished and the slice is cut into a plurality of diode elements which are cleaned in hydrofluoric acid.  As shown, a diode lamp is produced by joining a nickel-iron alloy ring 2 to the polished (N-type) face of a diode element 1 by means of tin washer 3 and joining a nickel-iron stub 4, plated with zinc and gold, to the opposite face.  The assembly is then etched and encapsulated in a housing comprising a glass tube 8 provided with end rings 9, 10 of nickel-iron alloy, cobalt-nickel-iron alloy or molybdenum.  Ring 2 is joined to ring 10 and the housing is closed using a molybednum disc 5, to which a gold-plated molybdenum tab 6 is welded, by heating under pressure in a forming-gas atmosphere.  Carbon and germanium may also be used for doping the original ingot.
Patent GB-665345-A (GB)
Title: Improvements in or relating to moulds for the manufacture of composite wood and like plastics
IPC: B27N3/20
Filed: 1948-02-16
Abstract: 665,345. Moulding thermosetting resin compositions. BERMAN, M. Feb. 16, 1949 [Feb. 16, 1948], No. 4444/48. Class 87(ii). A mould for the manufacture of boards or other articles from a composition comprising thermosetting synthetic resin and wood, plywood, wood fibre, wood flour or sawdust comprises a plurality of rigid hollow mould-plates, means for effecting heating and/or cooling of the mould plates, and means which adjustably space the mould-plates apart and constitute a closure for the space between them. Fig. 5 shows part of a stack of mould-plates 12, contiguous plates being spaced by members 19. Each spacing member, Fig. 6, is telescopic and comprises two channels 23, 24 and a bar 20. Springs such as 24 nomally maintain the channels in the extended position shown, but when pressure is applied to plates 12, to mould the composition disposed between them the springs yield. The channels have sharp edges 22. The channel 23 may be omitted. Each mould plate may have passages drilled through it, Figs. 1 and 2 (not shown), to provide for the circulation of a heating or cooling medium or to accommodate electric heating elements; alternatively, Fig. 3, the mould-plate 12 may have upstanding edges 13 and webs 14 which form a winding channel, a cover-plate 16 being secured to the edges and inlet and outlet openings 17, 18 being formed in the edge 13. The stack of mould-plates may be mounted in a casing 26, Fig. 7, having openings 27 aligned with the openings 17, 18. Sliding shutters 28 are fitted in openings 27.
Patent GB-210635-A (GB)
Title: Improvements in washers for washing gravel, sand or other similar material
IPC: B03B5/56
Filed: 1923-02-16
Abstract: 210,635. Southall, J. Feb. 16, 1923. Rotary washing- apparatus. - In a washer for gravel, sand &c. of the kind comprising a rotary cylinder having a continuous projecting member on its inner surface, the projecting member is made with helical portions B alternating with straight portions C.
Patent GB-580496-A (GB)
Title: Production of coloured photographic images
IPC: G03C7/413
Filed: 1944-03-11
Abstract: 2-Amino-5-diethylaminotoluene semiquinone is prepared by adding a glacial acetic acid solution of bromine to a glacial acetic acid solution of 2-amino-5-diethylaminotoluene hydrochloride.
Patent GB-691460-A (GB)
Title: Improvements in or relating to spoke-tightening machine
Inventor: MEYDRECH RAYMOND FRANK
IPC: B60B31/02
Filed: 1952-02-21
Abstract: 691,460. Screwing-up wheel spokes. MONARK SILVER KING, Inc. Feb. 21, 1952, No. 4590/52. Class 83 (iii). [Also in Group XXIII] The pneumatically-driven screwdrivers 17 of a machine for tightening the nipples of wheel spokes are pivotally and resiliently supported on sliding carriages 20 and each has a bit formed eccentrically to its axis of rotation so that it sweeps over the head of the nipple before settling in the driving slot, when the resilient mounting allows the bit to centre itself in the slot. The wheel 25 is secured in a holder 12 by a pneumatically-operated clamp 13 and is registered in position by a small finger engaging in the valve-hole in the rim. The carriages 20 are moved towards the wheel by pneumatic cylinders 19, against the action of a spring within each cylinder, and each carries a pair of screwdrivers pivoted at 60 and supported by a flexible washer in an upright part of the carriage. Pneumatic pressure is supplied from a pipe 28 through a regulating valve 41, filter 40 and lubricator 39 to a pair of control valves 32, 33 and thence to the clamp cylinder 15, the carriage cylinders and the pneumatic motors on the screwdrivers. The valves 32, 33 are fitted on opposite sides of the machine and must be operated simultaneously before the clamp can operate, so that both hands of the operator are clear of the clamp. Delay-action valves 44, 47 of the oil dash-pot or other type, are fitted in the lines to the carriage-cylinders and pneumatic motors so that they operate in sequence after the clamp has seated properly. Pressure regulating valves 58, 48, 54 are also fitted in the lines to the three operating units, the valve 48 in the pneumatic motor line being adjusted to regulate the torque at which each motor stalls when the nipple is screwed down to give the required tension in the spoke. A silencer 42 may be fitted on the exhaust lines 35 and 36.
Patent GB-988377-A (GB)
Title: Apparatus and method for sorting flat articles
IPC: B07C3/08
Filed: 1962-02-07
Abstract: 988,377. Statistical apparatus. M. M. LEVY. Feb. 7,1962 [Feb. 8, 1961], No. 4721/62. Heading G4M. In a machine for sorting flat articles such as cards or letters bearing code indicia, the articles are sorted into respective trays 7 arranged along a conveyer 3, and when the trays have been charged with articles they are replaced by empty trays from a storage station 10. Fig. 2 shows one method of transferring trays 7. Each row of trays 7 is arranged on a conveyer 11 at each end of which is a transfer conveyer 15 which may be swung into an operative horizontal position. The trays on any one conveyer 11 may thus be transferred on to a vertical conveyer 17 and thence to another tier of the store or to the sorting-station. At the same time charged trays 7 are removed from the sorting-station at the other end of conveyer 11 and are transferred to an empty storage tier. Two such sorting-machines may be used simultaneously, one on each side of conveyer 3. As an example, two such machines having ten tiers or rows of trays 7 with forty trays in a row may be used to sort mail into 800 "walks". The mail is divided between the two machines and is sorted into twenty groups, two trays being used for each group so that when one is filled articles of the same group may be automatically diverted to the second tray. The entire capacity of each machine may be used or that the mail is distributed amongst the 400 trays in each machine, the first two columns of trays in storage stations 10 containing articles of group 1, and the last two columns containing articles of group 20. Groups 1 and 20 are then removed from both machine stores and all the group 1 articles are sorted in one machine while all the group 20 articles are sorted in the other machine so that groups 1 and 20 are broken down into their constituent 40 "walks". The sorted "walks" are then transferred to empty storage locations and the process is repeated for groups 2, 19 and so on. Specifications 932,479, 981,879 and 981,880 are referred to.
Patent GB-1222421-A (GB)
Title: Fibrous webs
Inventor: CHIU HERMAN SHIN-GEE
IPC: A22C13/00
Filed: 1968-01-30
Abstract: 1,222,421. Paper. UNION CARBIDE CORP. 30 Jan., 1968 [31 Jan., 1967], No. 4784/68. Heading D2B. A fibrous web, e.g. of paper, is bonded with the product of curing a mixture comprising a cationic, water-soluble thermosetting resin and a water-soluble polyacrylamide resin. The thermosetting resin may be an epichlorohydrinpolyamide resin, a modified melamine-formaldehyde or a modified urea-formaldehyde resin. The polyacrylamide may be anionic or non-ionic. The mixture may be added to a fibrous pulp from which a paper sheet is sub-. sequently formed, or a preformed sheet of paper may be impregnated. In either case the sheet is heated to cure the resins. The bonded sheet may be subsequently coated and impregnated with cellulose xanthate and cellulose regenerated in situ to yield a material suitable for use as a casing for food products.
Patent GB-681021-A (GB)
Title: Improvements in or relating to matrix for production of plastic printing plates
IPC: B41C3/00
Filed: 1950-02-24
Abstract: 681,021. Compound sheet materials. NEWS SYNDICATE CO., Inc. Feb. 24, 1950. [Feb. 25, 1949] No. 4805/50. Drawings to Specification. Class 140. [Also in Group XVI] A laminated blank for a matrix for the production of plastic typographic printing plates comprises a compressible layer of fibrous material interspersed with a heat-curing resin, a flexible cohesive layer of cellulose fibres elastically bonded together and impregnated with a single-stage heat-curing resin, and a continuous film of a single-stage heat-curing resin. The compressible layer has a backing of unimpregnated porous paper. The compressible layer may be a low-density, resinised paper board comprising wood flour and paper fibres made from a pulp consisting of a mixture of finely-divided particles of phenolic resin moulding compound, solid heat-curing phenolic resin, and paper pulp fibres. Alternatively, the compressible layer may comprise bleached sulphite pulp impregnated with aqueous phenol formaldehyde resin. The flexible cohesive layer may comprise a sheet of paper fibres bonded by natural or synthetic rubber such as neoprene, which may be applied as a latex to a paper sheet and may be vulcanised. The sheet is then impregnated with an alcohol solution of the heat-curing resin. The rubber impregnant may be replaced by polyvinyl chloride or co-polymers of vinyl chloride and vinyl acetate in solution or emulsion, polyvinyl butyral, polyvinyl acetate, polyisobutylene, polymers and copolymers of acrylic and methacrylic esters, polyvinyl ethers, polystyrene, polyvinyl alcohol, caroxymethyl cellulose, hydroxyethyl cellulose, cellulose acetate, ethyl cellulose, linear polyamides and polyesters, glue, and gelatin. The resin used may be an ammonia-catalysed phenolic resin, or oil-modified phenol formaldehyde resins, heat-setting copolymers of unsaturated polyesters such as diethylene glycol maleate with ethylene monomers such as styrene, a heat-curing alkyd resin combined with butylated urea or melamine resin. The continuous film may comprise Portland cement as a filler; the resin may be the same as that used for the flexible cohesive layer. The film is applied, as a varnish to the cohesive layer, and subjected to air-drying followed by ovendrying at 130-150F, and then 200-250F. For forming the matrix, the blank and type forme are heated, and then forced together at the curing temperature of the resin, the continuous film being against the type forme. The press platen which contacts the backing layer may have a porous surface to allow escape of volatile matter. The matrix may be further cured by passing it through a heated oven or beneath a bank of infra-red heating lamps.
Patent GB-899350-A (GB)
Title: Air heating apparatus
IPC: B60H1/22
Filed: 1960-02-11
Abstract: 899,350. Generating combustion products under pressure. BAHCO A.B. Feb. 11, 1960 [Feb. 16, 1959; April 20, 1959], No. 4860/60. Class 51 (1). [Also in Group XIII] Apparatus for heating air for a vehicle (see Group XIII) includes a cylindrical, horizontal, liquid-fuel fired combustion chamber 1 around which are arranged passages for air to be heated forced therethrough by a motor-driven fan 7. Combustion air is supplied through an annular clearance 17 between the fan hub and an annular member 15 surrounding the vaporizer section 20, and this air flows by way of ports 23, 24 to the combustion zone. Liquid fuel is supplied to the vaporizing section 20 by a pump (not shown) from a level regulator 27. The vaporizing section incorporates an igniter 22 which is switched off by a thermostat when combustion has been initiated. Additional combustion air enters the combustion chamber at the rear end thereof through ports 33. Gases are exhausted from the combustion chamber through a duct 11 which incorporates an ejector consisting of a pipe 21 through which pressure air from the air heating passage 5 is branched off. Openings 26 leading to ambient air are formed in the exhaust duct 11 immediately below the ejector 21. In a modification (Fig. 4, not shown), combustion air may also enter the combustion chambe rin the vicinity of a constrictor flange 24<SP>1</SP>.
Patent GB-1065551-A (GB)
Title: Gear pumps and motors
Inventor: BOYDELL KENNETH RAYMOND
IPC: F04C2/18
Filed: 1964-02-06
Abstract: 1,065,551. Gear pumps and motors. DOWTY HYDRAULIC UNITS Ltd. Jan.26, 1965 [Feb. 6, 1964], No.5097/64. Heading F1F. In a gear pump a motor of the kind including axially movable bushes on one side of the gears subjected to delivery pressure in the case of a pump or supply pressure in the case of a motor on those surfaces of the bushes remote from the gears to urge the bushes into sealing engagement with the gears, the outer end of the driven or driving shaft is reduced in diameter to permit of the formation of an inwardly directed flange on the outer end of the associated bush and the repositioning radially inwards of that portion surrounding the shaft of the usual continuous sealing ring to increase the effective area of the bush within the ring subjected to delivery or supply pressure. The stub-shaft of the idler gear is also shortened to permit the bush associated with this gear to be similarly formed with an inwardly directed flange for the same purpose.
Patent GB-745438-A (GB)
Title: Improvements in or relating to frequency converter units
IPC: H02K47/28
Filed: 1953-02-25
Abstract: 745,438. Dynamo-electric machines; converting. SIEMENS & HALSKE AKT.-GES. Feb. 25, 1953 [Feb. 26, 1952], No. 5228/53. Classes 35 and 38 (2). [Also in Group XXXVII] A frequency converter arrangement for controlling the speed of synchronous motors, e.g. motion picture motors, from zero to normal running speed, has an output of variable frequency and a voltage having two components, one fixed independently of the speed and the other rising with the speed. The component of fixed voltage is derived from a resistance converter 9 which comprises a series of resistances 11 connected to the segments of a commutator 10 and fed at its diameter or extremities with smoothed D.C. derived from the mains 1 through a rectifier 13. The resistances 11 need not form a complete circle but may be connected to only half of the segments which are themselves connected across to the corresponding segments on the other side of the commutator, as shown in Fig. 2. Brushes 15 tap off three-phase supply which has a constant voltage but a frequency varying from zero to the normal frequency depending on the speed at which the apparatus is driven by motor 3. In the form shown in Fig. 1 the supply to the load motors 20 is boosted by a component of like frequency from an alternator 4 whose voltage naturally rises with the frequency. The brushes 15 are mounted on a suitable rocker to enable the voltages from the two sources to be correctly phased. In modifications, the A.C. generator is dispensed with and the voltage variation from zero to top speed is produced by controlling the D.C. voltage applied to the resistances 11. In one form, this is done by means of a saturable reactor in the circuit of rectifier 13, this reactor being controlled by a tachometer generator and, if desired, a load compounding coil. In an alternative form the feed to the rectifier 13 is controlled by a tapped transformer whose slider is operated by a centrifugal governor.
Patent GB-1114682-A (GB)
Title: Protective heads for thermal radiation receivers such as radiation pyrometers
Inventor: MCGEE LAWRENCE
IPC: G01J5/04
Filed: 1966-02-07
Abstract: 1,114,682. Radiation pyrometers. BRITISH IRON & STEEL RESEARCH ASSOCIATION. May 8, 1967 [Feb. 7, 1966], No. 5228/66. Heading G1D. A protective head 2 for a radiation pyrometer comprises a bore having a conical portion 5 leading to a sighting aperture 4 and an inlet 7 for introducing air in a direction tangential to the bore, the air passing along the bore towards the aperture 4 to deflect any unwanted particles either before they enter the bore or towards the inner walls of the bore. The pyrometer is adapted for use with an arc furnace and may be directed towards a part in the furnace, the head 2 protecting the lens system of the pyrometer.
Patent GB-418481-A (GB)
Title: An improved process for polymerising monomeric aldehyde sugars (aldoses)
IPC: C08B37/00
Filed: 1934-02-16
Abstract: Monomeric sugars are polymerized by heating them for 1 to 30 minutes with less than 0,1 per cent of mineral acid and without the employment of a vacuum at between 120 and 180 DEG  C.  Acids specified include sulphuric, phosphoric and hydrochloric; mixtures of acids having a stronger action than individual acids.  In examples, 100 parts of dextrose hydrate is heated with 0,002 parts of sulphuric acid for 10 to 30 minutes at 175 DEG  C. to give a water soluble product consisting of about \ba1/4\be unchanged dextrose and \ba3/4\be in the polymerized (chiefly dimeric) form. To avoid a bitter aftertaste in the product, the polymerization may be carried out with 0,01 to 0,02 parts of hydrochloric or sulphuric acid at 150 to 160 DEG  C. for up to 10 minutes.  100 parts of this product added to 20 to 30 parts of monomeric dextrose and diluted with water give a glucose syrup approximately the same as that derived from starch. When xylose is treated the temperature required is approximately 20 DEG  C. lower.  As an example 100 parts of xylose may be heated for 5 to 10 minutes at 125 to 130 DEG  C. with 0,01 parts of sulphuric acid.  Other temperature-time-proportions data are given.  The apparatus used may be a container fitted with stirring mechanism, a continuous tube furnace or a roller apparatus and glucose syrup or flakes or scales obtained.
Patent GB-234560-A (GB)
Title: Improvements in steam generator furnaces
IPC: F23H13/00
Filed: 1924-03-01
Abstract: 234,560. Jones, D. March 1, 1924. Fire-bars and grates: air, supplying.-A furnace grate is formed of fire-bars g. Fig. 1. having inclined ends g<1>, resting on triangular bearers b, e at the front and rear of the grate, and abutments g<2> resting on intermediate bearers f. The bars are provided on one side with grooves g<4> to provide air passages. Fig. 4 shows a modified form of bar with inclined and tapering grooves g<5>, but the grooves may alternatively be arranged vertically. A fire-bar with vertical and equally spaced grooves g' is shown in Fig. 10. The grooves of this bar may be tapered or both inclined and tapered. The bars across the width of the furnace abut against one another, but they may be slightly spaced or the grooves in certain or all of the bars may be arranged on both sides thereof. Narrow plain spacing bars may also be used. Fig. 19 shows a bar of inverted U-shape having inclined and vertical air passages. Transverse or longitudinal grooves may be provided in the fuel surface of the bars. Fig. 20 shows a group of bars with longitudinal grooves i into which emerge vertical passages k. In the furnace shown in Fig. 1, air steam or gases may be supplied through a tube or tubes i to the flue beyond the fire-bridge. Reference has been directed by the Comptroller to Specifications 5285/81, 231/87, 5903/96, 7268/03 and 224,068.
Patent GB-457033-A (GB)
Title: Improvements in or relating to the manufacture of cigarettes
IPC: A24C5/47
Filed: 1935-02-19
Abstract: 457,033. Cigarette-making machines. EDWARDS, W. F. M., 1, Kempsford Gardens, Earl's Court, London. Feb. 19, 1935, No. 5369. [Class 130] Cigarettes or lengths of cigarette rod and filter tips or mouthpiece portions are brought into alignment and united by bands of paper or cork which are wrapped around the assemblage while it is being rolled between relatively movable surfaces. The filter tips may consist of a different kind of tobacco to that used in the cigarettes. In the construction shown, a pair of cigarettes and a double-length filter tip are fed from hoppers into grooves 2a in a drum 2, in which they are retained by a guide 3 and brought into contact by guides 3a. Camoperated fingers 6 discharge the assembled lengths from the grooves and press them on to a uniting band 4, which is held by suction on an intermittently rotated rolling drum 5. The band is wrapped around the assembly while it is rolled between the drum and a stationary element 8, which may be resiliently mounted and heated. The finished cigarette is prevented from being rotated, after rolling, by an endless belt 9 moved with and at the same speed as the drum and is finally delivered down a shoot 11. In modifications (1) single cigarettes and single filter tips are united, (2) double lengths of cigarette rod are united to single filter tips disposed at the ends, (3) several lengths of cigarette rod and filter tips are united together by the application of more than one uniting band, (4) the rolling means consists of an endless band passing over a flat table and a flat member or an endless band moving relatively to the other band, (5) the uniting bands are positioned on an intermittently moving endless belt and the assembled lengths are fed laterally on to the bands, which carries them axially to the rolling mechanism and (6) the lengths are applied at an intermediate position in the length of the bands and the rolling mechanism has an oscillating movement to effect part of the wrapping by rolling in one direction and the remainder by. rolling in the opposite direction.