baber/WOPTO huggingface dataset:
Patent GB-1474942-A (GB)
Title: Semiconductor light-emitting diode device and method for producing  same
IPC: H01L21/208
Filed: 1974-05-02
Abstract: 1474942 Electroluminescence RACHARMAKADZE R I CHIKOVANI and Z I ALFEROV 2 May 1974 [28 May 1973 31 May 1973 12 June 1973] 19363/74 Heading C4S [Also in Division H1] A light emitting diode comprises a P+ type gallium arsenide substrate on which have successively been deposited P, compensated and N type layers of Al x Ga 1-x As, the P and N layers being doped with Zn and Te respectively and the compensated layer with both Zn and Te and the value of x lying between 0�3 and 0�37 in the P layer, between 0�4 and 0�65 in the N layer, and within 0�05 of that in the P layer in the compensated layer. As described the substrate and the N type layer are directly ohmically contacted by layers of Al, Ni, Cu, Sn, Ag, Au or alloys thereof. Alternatively an N + or N + and N + + layers may be disposed between the N type layer and its contact. The N, N+ and N+ + layers may each cover the whole or only part of the immediately underlying layer. Numerous examples are described with various layer and substrate thicknesses and doping and are preferably produced by liquid phase epitaxy from two melts of Ga, Al and As containing Zn and Te, and Te respectively. Initially the GaAs substrate is contacted by the Zn and Te containing melt and after a period of cooling to deposit the P type layer the other melt is added and cooling continued to deposit the compensated and N layers from the mixed melt the cooling rate being increased in two steps to provide the N + and N + + layers where required, any desired areal limitation of layers being achieved by selective etching. Processing details are given.
Patent GB-1019707-A (GB)
Title: Improvements in or relating to polyamides
IPC: C08G69/26
Filed: 1964-05-11
Abstract: Transparent, non-crystalline polyamides having a softening temperature above 100 DEG  C. are obtained by polycondensing hexamethylene diamine with a mixture of 30 to 15% tere- and 70 to 85% iso-phthalic acids or chlorides or esters thereof.  In examples the ratios of iso-:tereare 74:25, 80:20 and 70:30.
Patent GB-1386723-A (GB)
Title: Processing apparatus
IPC: G03D15/00
Filed: 1973-04-24
Abstract: 1386723 Photographic processing apparatus LOGETRONICS Inc 29 June 1973 [24 April 1973] 19471/73 Heading G2X A photographic film processor comprises at least one treatment tank for containing a chemical for processing said photographic film, a wash tank disposed the treatment tank, two rollers between the treatment and wash tanks for moving a sheet of film from the treatment tank to the wash tank, cleaning means for applying cleaning liquid on to rollers to remove residual processing chemical therefrom and means for directing the cleaning liquid flowing off the moving means into the wash tank. As shown, Fig. 1 a film is fed from an automatic film processor (17) having developer and fixer tanks (18, 19) into a wash tank 1 by means of squeegee rollers, 4, 5 which are washed with water from a spray 3 in a basin 2; this water is then deflected by a guide 11 down wall 1a of the tank. The tank is provided with an overflow 12 and a net 6 for removing the washed film. In an alternative embodiment Fig. 3 (not shown) a discharge pipe runs from the basin to wall of the tank.
Patent GB-1359767-A (GB)
Title: Homopolymers and block polymers of styrene
IPC: C08F257/02
Filed: 1972-04-27
Abstract: 1359767 Styrene polymerization; block copolymers; foamed beads MOBIL OIL CORP 27 April 1972 [12 May 1971 (2)] 19518/72 Headings C3C and C3P Anionic polymerization of styrene or a non- polar substituted styrene is carried out in a paraffinic or mono-olefinic hydrocarbon slurrying medium containing as dispersant a block copolymer of the A-B or A-B-A type, in which the A block(s) are derived from styrene and constitute 10 to 80% by wt. of the copolymer and the B blocks are derived from a substituted styrene, the block copolymer having no aliphatic unsaturation and having a Tg value above 50‹ C. Preparation of two-block styrenet-butyl styrene copolymers, suitable for use as the dispersant, is described. The slurry of living styrene polymer produced by the process can be deactivated and recovered, or it may first be reacted with another monomer, e.g. 2- vinylpyridine, N,N-diethylacrylamide ethylene oxide, isoprene or acrylonitrile to form block copolymers. In Example 21 a slurry of living polystyrene was prepared in hexane, after-treated with acrylonitrile and recovered in the form of beads which could be foamed by heating, owing to the occlusion of hexane, and were then hydrolysed to form polyelectrolyte foamed beads of the block polymer. The living polymer slurry can alternatively be modified by reaction with a divinylbenzene, recovered, and reacted with a second monomer in the presence of a polymerization catalyst to form block copolymers, wherein the second monomer is not anionically polymerizable. In examples, acrylonitrile or vinylidene chloride is blocked on be a free radical process and isobutylene or a butene-1/ethylene mixture is blocked using a Ziegler catalyst prepared from trimethylsilylvanadate and Et 2 AlCl.
Patent GB-147637-A (GB)
Title: Improvements in pistons
IPC: F16J1/00
Filed: 1920-07-08
Abstract: 147,637. Barthel, O. E. May 25, 1914, [Convention date]. Pistons; piston packing; pistons, balancing laterally.-In a piston for an internal-combustion engine or air-compressor &c., the piston head is movably attached to a cylindrical skirt and may be formed with packing-lips with feather edges, or carry packing rings with feather edges. In the form shown in Fig. 3, the piston head 34 is formed with inclined grooves 10 with feather edges 11 which are expanded by heat and by the fluid pressure. The piston skirt 35 carries bosses for the gudgeon-pin which also passes through holes in arms 21 on the piston head. In the modification shown in Fig. 4, the piston head is formed with a packing flange 37 having a feather edge. The under side of the head may be provided with a similar flange acting as a scraper. The skirt may be similar to that shown in Fig. 3, or, as shown, the skirt may consist of segments 18 connected by webs which carry the gudgeonpin bosses. In the modification shown in Fig. 2, the piston is packed by U-shaped rings 26 having feather edges 33. The head is formed in two parts 19, 20 having flanges which form a seating for the rings 26. The parts 19, 20 are secured together by a cotter 31, which passes through holes in arms 21 on the part 19 and in an arm 28 on the part 20. The head is connected to the skirt by the arms 21. The Specification as open to inspection under Sect. 91 (3) (a) describes also the application of the packing shown in Fig. 3 to a piston having the skirt integral with the head. This subjectmatter does not appear in the Specification as accepted.
Patent GB-320112-A (GB)
Title: Improvements in or relating to stoppers or closures
IPC: B60K15/04
Filed: 1928-07-06
Abstract: 320,112. Stevens, T. A., and Geandess, Ltd. July 6, 1928. Bayonet-joint and spring stoppers having an enclosed sealing-washer which is spring-pressed on to its seating. A cap 6 has internal projections 8 which engages under wedge-shaped shoulders 3 in the neck 1 of a container. Stops 4 on either side of the entry slot in the projections 8 prevent unintentional release of the cap. Within the cap a cup-shaped member 9 carries the sealing ring 10 and is pressed by a spring 12 on to the neck 1. The member 9 is inwardy domed and covered by a plate 14, which clamps the ring 10 in position and is secured by a rivet 17. Vent-holes 13, 15 are formed in the plates 9, 14. Petrol &c. passing through the vent -hole 15 is collected in the chamber 16 and returns to the tank either through the said hole or over the rim of the plate 14. The washer 10 is pressed on its seating by the engagement of the lugs 8 with the shoulders 3, but should the cap slack back this pressure is supplied by the spring 12. To disengage the cap the projections 8 must be pressed below the stops 4. Stops 5 register the path of release of the lug 8. Specification 322,291 is referred to in connection with the anti-splash plate 14.
Patent GB-915860-A (GB)
Title: Variable-pitch propeller assembly
IPC: B64C11/36
Filed: 1961-05-31
Abstract: 915,860. Variable-pitch propellers. GENERAL MOTORS CORPORATION. May 31, 1961 [July 12, 1960], No. 19641/61. Class 114. A variable-pitch propeller assembly has a pitch regulator 144, 146 fixed to one side of the propeller and a hollow hub extension 14 fixed to the other. A control ring 35 coaxially encircles the extension 14 and is fixed for rotation therewith but slidable axially thereof. A shaft 126 within the extension 14 is mounted for rotation with the propeller and also about its own axis to operate the regulator 144, 146. A converter connection between the ring 35 and shaft 126 to convert axial sliding of the ring into rotation of the shaft about its own axis comprises a ring extension 40 carrying rack teeth 52 which mesh with a pinion 72 to drive bevel wheels 100, 106. The ring 35 is moved by the control lever 148 acting through the linkage 98, 82, 80 and the shaft 126 has a lead screw 138 which engages the nut 144 to move the lever 146 and actuate a blade pitch control valve (not shown). As described, the propeller has its pitch control valve independently operable by three of the above mechanisms, each having a control ring slidable on the extension 14.
Patent GB-998267-A (GB)
Title: Curing epoxy resins
IPC: C08G59/40
Filed: 1962-05-22
Abstract: Epoxy resins are cured with the aid of a chloroborazine of formula <FORM:0998267/C3/1> wherein X is H or an alkyl or aryl radical. Suitable epoxy resins are the glycidyl ethers of bisphenol A, ethylene glycol, propylene glycol, trimethylene glycol, diethylene glycol, triethylene glycol, glycerol, dipropylene glycol, or 1,2 - tetramethyl disilanol; 3,4 - epoxy - 6 - methyl cyclohexylmethyl - 3,4 - epoxy - 6 methyl - cyclohexanecarboxylate.  All the examples use EPON 828-a bisphenol A-epichlorohydrin condensate.  The following curing agents are employed:  Examples I, II, III, b -trichloroborazine; IV, V, b -trichloro-N-trimethylborazine.
Patent GB-989580-A (GB)
Title: Improvements in or relating to hydraulically actuated shovel excavators
IPC: E02F3/32
Filed: 1963-05-17
Abstract: 989,580. Shovelling machines. POCLAIN. May 17, 1963 [May 17, 1962], No. 19693/63. Heading E1F. To allow of satisfactory offset working of the scoop of a shovel excavator in which a scoop-carrying arm 8 is pivotally mounted about a horizontal axis 7 to one end 3b of a vertically swingable boom pivoted at the other end 3a about a second horizontal axis 4 on the chassis of the excavator, the boom has an intermediate portion of links 13, 14 pivotally connected at 15, 16, 17, 18 to the end portions thereof about axes extending at right angles to the plane containing said horizontal axes. The links 13, 14 together with the boom end portions 3a, 3b form a parallelogram linkage which can be adjusted by an hydraulically actuated jack 19.
Patent GB-1014075-A (GB)
Title: Improvements in or relating to protective coatings
Inventor: STONEHOUSE GEOFFREY FRANCIS
IPC: H01B3/44
Filed: 1963-05-17
Abstract: Compositions suitable for protective coatings comprise a petroleum wax, a copolymer of an alkene and an ester of an unsaturated alcohol and a carboxylic acid or a mixed alkene copolymer, and an oil, the proportions of wax, copolymer and oil being such that the compositions are capable of bleeding oil. The wax may be a paraffin or microcrystalline wax, and may be present partly or wholly as petrolatum. The oil may be a refined mineral oil, and the compositions may also comprise antioxidants, e.g. hindered phenols, and corrosion inhibitors. The compositions may be applied to high voltage electrical insulators.ALSO:Compositions suitable for protective coatings comprise a petroleum wax, a copolymer of an alkene and an ester of an unsaturated alcohol and a carboxylic acid or a mixed alkene copolymer, and an oil, the wax, copolymer and oil being present in such proportions that the composition is capable of bleeding oil.  The wax may be a paraffin wax or a microcrystalline wax, and may be present wholly or partly as petrolatum.  The copolymer may be a vinyl acetate/ethylene copolymer or an ethylene/propylene copolymer.  The oil may be a refined mineral oil. The compositions may also comprise antioxidants, e.g. hindered phenols, and, where intended for application to metal substrates, corrosion inhibitors.  The compositions may be applied, e.g. by melt dipping, to high voltage insulators.  Examples describe compositions comprising vinyl acetate/ethylene copolymers and (1) petrolatum, microcrystalline wax and mineral lubricating oil, (2) petrolatum and transformer oil, (3) and (6) petrolatum and mineral lubricating oil and (4), (5) and (7) microcrystalline wax and mineral lubricating oil; and comprising ethylene/propylene copolymers and (8) and (10) paraffin wax and mineral lubricating oil, (9) microcrystalline wax and mineral lubricating oil, and mineral lubricating oil together with (11) refined paraffin wax and petrolatum and (12) microcrystalline wax.ALSO:Substrates may be coated with protective coating compositions comprising a petroleum wax, a copolymer of an alkene and an ester of an unsaturated alcohol and a carboxylic acid or a mixed alkene copolymer, and an oil, the wax, copolymer and oil being present in such proportions that the composition is capable of bleeding oil. The compositions may also comprise antioxidants and, when applied to metals, corrosion inhibitors.  The compositions may be applied, e.g. by melt dipping, to high voltage electrical insulators, and examples describe the coating of such insulators with compositions comprising vinyl acetate/ethylene copolymers and (1) petrolatum, microcrystalline wax and mineral lubricating oil, (2) petrolatum and transformer oil, (3 and 6) petrolatum and mineral lubricating oil, and (4, 5 and 7) microcrystalline wax and mineral lubricating oil; and comprising ethylene/propylene copolymers mineral lubricating oil and (8 and 10) paraffin wax, (9 and 12) microcrystalline wax and (11) refined paraffin wax and petrolatum.
Patent GB-801169-A (GB)
Title: Process for the preparation of 2 (alpha-aminoethyl)-furan and derivatives thereof
Filed: 1957-06-24
Abstract: 2-(a -aminoethyl)-furan is prepared by reacting 2-acetylfuran with ammonium hydroxide and hydrogen in an aqueous (including aqueous/alcoholic) system in the presence of an hydrogenation catalyst, preferably an activated form of nickel, such as sponge nickel or Raney nickel, although any catalyst which will promote selective reductive amination of the carbonyl group, without leading to reduction of the furan ring may be used.  The 2-(a -aminoethyl)-furan may be recovered as such or converted in situ to a salt, e.g. hydrochloride or a 2-(a -acylamidoethyl)-furan, e.g. 2-(a -acetamidoethyl)-furan. The ammonia may be introduced as liquid ammonia, but preferably as ammonium hydroxide, which under optimum conditions represents an ammonia concentration of ca. 10-30 per cent by weight of the water present in the system.  The ratio of ammonia to ketone may be as low as 1 : 1, but is preferably at least 4 : 1. The hydrogen is also preferably present in excess.  The reaction may be conducted at room temperature, but preferably at about 50-75 DEG C., optionally about 60-65 DEG  C. and at an hydrogen pressure as low as about 1 atmos., but preferably about 20-60 p.s.i.g.  It is preferred to include a solvent, miscible with both 2-acetylfuran and the product, e.g. a lower alkanol such as isopropanol.  In examples: (1) 2-(a -aminoethyl)-furan is prepared by reacting 2-acetylfuran, ammonium hydroxide and hydrogen, in the presence of a Raney nickel catalyst and isopropanol; (2) 2-(a -aminoethyl)-furan is prepared similarly and converted to the acetate by means of glacial acetic acid; (3) this acetate is acetylated with acetic anhydride in pyridine solution to give 2-(a -acetamidoethyl)-furan; (4) 2-(a -aminoethyl)-furan together with some, presumably, N,N - bis - (a  - furylethyl) - amine is prepared as in (1), but using a sponge nickel catalyst; (5) the crude 2-(a -aminoethyl)-furan from (4) is converted to the hydrochloride with HCl; the sulphate and phosphate are also mentioned.
Patent GB-516734-A (GB)
Title: Wear resistant metal alloy
IPC: C22C1/05
Filed: 1938-07-05
Abstract: 516,734. Alloys. WILLEY, F. H. July 5, 1938, No. 19881. Convention date, July 21, 1937. [Class 82 (i)] A hard alloy for gauges, lathe centres and other articles is made by heating under pressure in a series of stages of increasing pressure and temperature a powdered mixture of 76-87 per cent. of tungsten carbide having a 6 per cent. carbon content, 9-20 per cent. of cobalt, nickel, or iron, and up to 4 per cent. of molybdenum and chromium, with or without a small amount of boron, silicon, tantalum, antimony, manganese, titanium, vanadium, or zirconium, for example up to 10 per cent. of titanium. The temperature may be 900-1,750C. and the final pressure 700-1,400 kg. per sq. in. The product may be ground and polished to give a reflecting surface. Specification 462,809, [Group XI], is referred to.
Patent GB-730395-A (GB)
Title: Electric switches interlocked with components in their circuit
Inventor: STENT BERTRAM HENRY GEORGE
IPC: H01R13/707
Filed: 1952-08-07
Abstract: 730,395. Two-part couplings combined with switches. SIMMONDS & STOKES (NIPHAN), Ltd. July 23,< >1953 [Aug. 7, 1952], No. 19918/52. Class 38 (1). In a switch-socket wherein a a plunger 15 is projected over a plug or socket-cover to prevent removal thereof when the switch is "'on," the plunger is spring-urged inwardly of the switch cover 6 and carries a steel cam-plate 14 at its inner end which co-operates with a forked steel crank arm 12 carried by the shaft 9 of'the switchoperating knob. The forked end 13 of the arm 12 operates the switch and the opposite end actuates the plunger.
Patent GB-471698-A (GB)
Title: Process for the manufacture of laminated wood
IPC: B27D1/04
Filed: 1936-07-18
Abstract: 471,698. Laminated wood. SAMSONOW, E. C. A. DE. July 18, 1936, No. 19983. Convention date, July 19, 1935. [Classes 145 (i) and 145 (ii)] [Also in Group XXXIII] A process for the treatment of laminated wood par. ticularly applicable to the manufacture of air-propellex and fan blades consists in applying to a stack of superimposed adhesive - coated laminations a pressure which is heavy at one part, light at another, the pressure being graded over the intermediate transition zone. This procedure can be carried out by interposing between the main laminations a, shorter laminations the internal ends of which are tapered. The assemblage is then pressed until the central portion of the stack is solid. According to another method, a stack of laminations are operated on by a three-part press such as is indicated in Fig. 2, the end sections being formed with shouldered or inclined inner surfaces and reduced ends to effect the desired local pressure. According to a further modification, the ends of the stack may be pressed in two directions at right-angles.
Patent GB-836196-A (GB)
Title: Improvements relating to receiving apparatus for pulse code signals
IPC: H03K3/13
Filed: 1956-06-28
Abstract: 836,196. Code telegraphy. TELEFUNKEN G.m.b.H. June 28, 1956 [June 29, 1955], No. 20036/56. Class 40 (3). In receiving apparatus for pulse code signals, such as teleprinter signals, in which signal evaluation is dependent upon the signal waveform crossing a predetermined threshold and in which the signal is liable to frequency band limitation and loss of the D.C. component, there are provided in a branch of the signal transmission path two oppositely-poled peak rectifiers G1, G2 which function to derive the D.C. component of the signals and means for introducing the component into the signal path in such way as to tend to cause the signal fed to the evaluation device to have equal amplitude excursions about a predetermined value. The means for introducing the D.C. component comprises amplifier V2 having a cathode load K in common with amplifier V1 receiving the incoming signal. Rectifiers Gland G2 have equal loads CR joined by equal resistors R1, R2, from the junction of which the D.C. component is derived. Reference is made to the use of the invention in receivers for frequency-modulated signals.
Patent GB-531905-A (GB)
Title: Improvements in or relating to gas turbine plant
Filed: 1939-07-11
Abstract: 531,905. Gas turbines. JENDRASSIK, G. July 11, 1939, No. 20220. Convention date, July 14, 1938. [Class 110 (iii)] In a gas turbine plant of the continuous combustion type, comprising a compressor 3 driven by the turbine 1, with or without a heat exchanger 7, the load is regulated by byepassing part of the working fluid supplied by the compressor, either in the compressor, or at one or more interstage points 31 ... 31<111> controlled by a slide valve 35. The fluid normally passes from the compressor through pipes 6, 8 to the heat exchanger 47 and through the combustion chamber 10 and pipe 12 to the turbine. Part of the fluid may be byepassed through pipe 17 controlled by a throttle valve 18. Specifications 492,831 and 516,438 are referred to.
Patent GB-442588-A (GB)
Title: Improvements in or relating to boxes or cases for use by anglers for containing artificial flies
IPC: A01K97/06
Filed: 1934-07-10
Abstract: 442,588. Boxes for anglers' flies. RHODES, J. PARKER-, Finningley Park, Bawtry, Yorkshire. July 10, 1934, No. 20261. [Class 18] [See also Group VI] Artificial flies 4 for fishing are held in a box or case by passing the hooks between rods 8 and a resilient bed 6. The barb of each hook interlocks with the opposite side of the rod. The bed comprises a piece of hard flexible material backed by coiled or other springs or a sponge rubber pad which may be faced by a hard, flexible covering 5, e.g. celluloid. To separate the flies, the rods carry transverse strips &c. or an oval rod may be notched so as to form projections 9. The rods may be of non-tarnishable material and be secured directly to the sides of the box or to metal &c. strips lying against the box walls. Alternatively, the ends of the rods are located in recesses in the box or a separate frame which may comprise superimposed members hinged together.
Patent GB-829938-A (GB)
Title: Improvements relating to glutamic acid
Filed: 1958-06-24
Abstract: Racemic glutamic acid is resolved by making a hot saturated solution of racemic glutamic acid in sufficient aqueous potassium hydroxide to convert not more than 85% of the acid to the mono potassium salt, cooling to below the temperature at which all the glutamic acid would just dissolve, seeding the solution with solid crystals of the desired optically active isomer, and cooling further until the active isomer crystallizes out.  The original solution may also contain a proportion of the optical isomer which is to be isolated.
Patent GB-1049016-A (GB)
Title: Improvements in or relating to electrical filters
IPC: H03H2/00
Filed: 1965-05-13
Abstract: 1,049,016. Filters; radio-receiving systems. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. May 13, 1965 [Aug. 14, 1964], No. 20305/65. Headings H3U and H4L. To prevent interference in a receiver from transmitters situated in the vicinity thereof and permit reception from a desired transmitter, the receiver is provided with a filtering system comprising a plurality of reactances interconnected by switching means such that when the switching means is in one position the reactances form a band-pass filter of a certain frequency range and when the switching means is in its other position the reactances form a band-rejection filter of the same frequency range. As shown, the reactances L 1 , L 2 , C 1 , C 2  are interconnected by three ganged switches each having an earth terminal which may be connected to position F or position S. When the switches are in position F a band-pass # filter is formed (Fig. 2, not shown) whereas when they are in position S a band-rejeetion # filter is formed (Fig. 3, not shown). The frequency range is adjustable by the variable condensers C 1  and variable inductances L 2 .