baber/WOPTO huggingface dataset:
Patent GB-1329041-A (GB)
Title: Method of manufacturing semiconductor elements by a liquid phase growing method
IPC: H01L29/00
Filed: 1971-04-19
Abstract: 1329041 Epitaxial growth on substrate OKI ELECTRIC INDUSTRY CO Ltd 19 April 1971 [14 Feb 1970 (2)] 21642/71 Heading B1S [Also in Divisions H1 and C4]  A body of a mixed A 111  B v  compound containing PN junctions is produced by contacting a substrate with a solution containing the component elements of the compound and donor and acceptor impurity elements, and then cooling alternately quickly and slowly to form alternate P and N regions. Thus to form Ga x Al 1-x P gallium is used as solvent and tellurium and zinc or cadmium in a weight ratio of 2:1 used as donor and acceptor respectively. A P type GaAs substrate and the solution are heated separately in a flow of inert or reducing gas to 950‹C and then brought into contact. After 10 minutes the temperature is reduced first at 2‹C/minute for 5 minutes and then at 20‹C/minute for 1 minute. Repetition of these cooling steps gives a PNPN switch structure which luminesces at the forward biased junctions, the wavelength of the light being variable by adjustment of the solution composition and cooling rates. In a modified process, after the first slow and fast cooling, cooling is continued at the slow rate. Initially this gives a P type deposit but after 7 minutes due to selective evaporation of the zinc N type material is deposited.
Patent GB-710553-A (GB)
Title: Improvements in or relating to the manufacture of siliceous material
IPC: C01B33/18
Filed: 1952-08-28
Abstract: Silica is prepared by reacting a mixture of silicon tetrachloride and a silane which is trichlorosilane or an organo-silane of general formula RnSi X 4-n with water in the vapour phase at temperatures of at least 300 DEG C.  R is an alkyl radical having less than 7 carbon atoms or a monocyclic aryl radical, n has a value from 1-3 and X is chlorine or an alkoxy radical having less than 7 carbon atoms.  The mixture should contain at least 25 mol. per cent. of silicon tetrachloride otherwise hard horny gels will result on hydrolysis. It is stated that the finely divided silica product contains silicon bonded alkyl or phenyl groups or hydrogen atoms.ALSO:Silica is prepared by reacting a mixture of silicon tetrachloride and a silane which is trichlorosilane or an organo-silane of formula Rn SiX4 - n where R is alkyl having less than 7 carbon atoms or a monocyclic aryl radical, X is chlorine or an alkoxy radical having less than 7 carbon atoms and n has a value from 1 to 3, there being at least 25 mol. per cent. of silicon tetrachloride, with water in the vapour phase at at least 300 DEG C., the ratio of the reactants being such that at least 1 mol. of water and preferably 5 mols. is present per 2 hydrolysable silane units.  Suitable organo silanes are those where R is methyl, ethyl, propyl, butyl, isopropyl and tertiary p  butyl, phenyl, tolyl and xylyl, the use of which renders the silica hydropholic. Employing trichloro-silane the silica is hydrophilic.  The reactants are preferably separately preheated to at least 300 DEG C. before introduction into the reaction zone, the temperature in which should not exceed 800 DEG C.  The final product is of fine particle size and may contain silicon bonded alkyl or phenyl groups or hydrogen atoms.
Patent GB-786304-A (GB)
Title: Compositions for the culture and protection of crops
Filed: 1955-07-27
Abstract: A fungicidal composition comprises 1,4-dibromo-2-butyne as an active ingredient preferably in an amount of from 5-95 per cent by weight in intimate admixture with at least one adjuvant of the group consisting of inert finely divided solids, dispersing and emulsifying agents, aqueous emulsions, acetone and petroleum distillates.
Patent GB-348464-A (GB)
Title: Improvements relating to rollers for laundry ironing machines
IPC: D06F67/02
Filed: 1930-07-18
Abstract: 348,464. Hollow rollers. TULLIS, D. K., Kilbowie Iron Works, Clydebank. July 18, 1930, No. 21753. [Class 34 (i).] In a Decoudun type ironing-machine the roller comprises a cylindrical shell 1 with interrupted circumferential ribs 7 and a perforated cylindrical sleeve 9 supporting the padding 10. An annular cellular jacket is thus formed around the shell whereby a passage unobstructed by padding is provided permitting heated air to flow from cell to cell to radial passages 5 communicating with a source of suction.
Patent GB-614537-A (GB)
Title: Improvements in and relating to arm or easy chairs, settees and the like articles of furniture
IPC: A47C5/10
Filed: 1946-07-22
Abstract: 614,537. Furniture frames. GARBE, P. E., and AIRCRAFT STEEL STRUCTURES Ltd. July 22, 1946, No. 21783. [Class 52 (ii)] Arm chair or settee frames of metal, preferably tubing, comprise forming each arm of two lengths of tubing appropriately bent and arranged in spaced relation side by side and a back connected at each side to an arm element by at least two members. The arms are formed of metal tubing and each comprises an inner frame member 7, 8, 9 welded at 16 to the front transverse member 4 of the chair and at 12 to an offset portion of the back and also to a spaced second frame outer member 11 ... 15 the lower member 11 of which slopes downwardly and forwardly and is bent to form a front foot 10. The back comprises a top member 1 side members 2 which are bent forwardly to form a seat support 3 and which is welded to the front member 4. The back members 2 have welded to them offset portions 5 which are bent at 6 to form rear feet and are then welded at 12 to the arm members. The back and front members 1, 4 may be provided with joints 32, 32a which enable the chair sides to be separated and an additional arm interposed when it is desired to form a settee. Such an additional arm is shown in Fig 3 and comprises spaced arm members 38 ... 43 welded to back and back offset members 33, 37. The parts 38, 42 serve as feet and the member 36 is joined in alignment with the frame member 4. Frames for carrying the upholstery may be slid on to the tubular frames of the arms and back and in the case of arms, may comprise a box formation of sheet metal as shown in Fig. 5. Such a frame comprises front and rear plates 45, 45a with flanges 46 inner and outer plates 49, 50<1> and the outer plate 50<1> having an angular reinforcing edge or bar 51, top plate 48 and curved corner plates 47, 47a. Specification 605,944 is referred to.
Patent GB-1136276-A (GB)
Title: Improvements in or relating to devices for shearing metal bars
IPC: B23D21/00
Filed: 1966-05-17
Abstract: 1,136,276. Sub - press mechanism. SCHOSTAL S.A. 17 May, 1966 [22 May, 1965], No. 21804/66. Heading B3W. A sub-set for shearing lengths from metal bars comprises a base 28, four guide columns 22, Fig. 2 (not shown), and a block 1 which supports a fixed shearing blade 20. A tool-slide 4 is vertically movable in the block and carries a shearing blade 21. The upper surface of the block engages a plate 2 which is guided on the columns 22 and is biased upwardly by compression springs 3 around the columns. The uppermost position of the plate 2 is determined by stops on the columns. Projecting upwardly from the slide 4 are plungers 18 which are acted on by compression springs, the plungers being engaged by the ram of an operating press which compresses the springs before it actuates the slide 4. The press slide is adjusted so that it moves the slide directly only through a distance sufficient to shear a bar (i.e. about 1/3 of its diameter) the stroke being completed, to detach the slug, by the expansion of the plunger springs. The bar to be cut is fed to a gauging stop 7 which is adjustable by a screw 29. The bar is inclined at an angle of 7-12 degrees to the path of movement of the slide 4 in order to provide clearance for the upper cutter. The bar is clamped on the feed side by two co-acting wedges 5 and 6 of which the wedge 5 is acted on by a spring indicated by the arrow 16. This spring is controlled by cams 12 rigidly connected to the plate 2, and is allowed to act on the wedge 5 shortly after the slide begins to compress the plunger springs. A second vertically movable cam 9 is then engaged by the press-slide and moves a support 8 under the bar against the effect of a spring 25. The cam 9 also has a slightly angled face 9<SP>1</SP> which moves the stop. 7 against the end of the bar. An ejector 10 is activated at the end of the downward movement of the cam 9, by engagement with an anvil 27.
Patent GB-1024233-A (GB)
Title: A collapsible shelter
IPC: B60P3/34
Filed: 1962-06-06
Abstract: 1,024,233. Convertible vehicle; roof racks. T. M. BOULTBEE. May 28, 1963 [June 6, 1962], No. 21809/62. Headings B7B and B7J. A tent supporting frame 17 comprises an arch member 19 to which longitudinal members 18, 20 are secured, these latter members being telescopically accommodated in the tubes 10, 16 on the roof rack. A further supporting frame comprising an arch member 24 and longitudinal members 22, 23 is telescopically accommodated in the tubes of the extension 17. Telescopic legs 25 are adjustable and are hinged to the member 30.
Patent GB-708419-A (GB)
Title: Improvements in or relating to tuyeres
IPC: F23C99/00
Filed: 1952-08-29
Abstract: 708,419. Tuyeres. BABCOCK & WILCOX, Lid. Aug. 29, 1952 [Aug. 30, 1951], No. 21821/52. Class 51 (1). [Also in Group XI] A tuyere comprises a body portion 26 formed with a first chamber 34 having an inlet 25 for secondary air and a second chamber 33 having an inlet 22 for pulverized fuel and primary air, an eductor nozzle 35 through which air flows from chamber 34 to chamber 33 so as to effect an eductive action at the pulverized-fuel inlet 22 and a port 44 having closure means 45 and affording passage for a poker which can also pass through the nozzle 35.
Patent GB-634336-A (GB)
Title: Electromagnetic impulse motors
IPC: H02K25/00
Filed: 1947-08-08
Abstract: 634,336. Electric motors. REMINGTON RAND, Inc. Aug. 8, 1947, No. 21844. Convention date, Oct. 17, 1942. [Class 35] In an interrupter-type motor, e.g. for dry shavers, the rotor 37 is fixed angularly whilst permitting axial adjustment for end play be means of a grub screw (not shown) acting on flat 36, and the shaft has a shoulder 20, at its end remote from the contact-breaker cam 16, against which the operating eccentric 21 is locked on the shaft by engagement of its outer end in a socket 31 in the inner face of the manual starting wheel 25. The eccentric is screwed on to a reduced portion 19 of the shaft and is held in position together with the moulded starting-wheel, which has a metal centre-plate 26, by a nut 35. A roller 32 is arranged to rotate about the eccentric, washers 33 and 34 being placed on either side of it to take axial thrust, whilst a further washer 43 is placed between the bearing bush and the rotor stock. The interrupter cam 16 is formed by machining a groove 15 and drilling an axial bore 17 before pressing the cam into its desired shape. Specification 634,337, [Group XXII], is referred to.
Patent GB-1463907-A (GB)
Title: Method and apparatus for the production of bag forming material
IPC: B29C48/12
Filed: 1974-05-16
Abstract: 1463907 Extruding sheet and interchangeable ribs; seaming non-metallic sheet material MINIGRIP (LONDON) Ltd 16 May 1974 21879/74 Headings B5A and B5K [Also in Division E2] A plastics film, for making bags, has extruded plastics interengageable and separable male and female bag closure elements which have been applied and adhered by fusion to the film, at locations spaced across its width and extending continuously along its length, with the application of at least one of the elements, e.g. 35, Fig. 4, being effected with the element being cooled by successive different coolants, e.g. water and air, from the nozzles 22, 23. The film may be preformed, and heated prior to the application or, as described, is directly extruded from one die having attached separate dies from which each of the elements are extruded fusingly applied to one surface of the heated film 16, as its other surface is cooled in moving in contact with a film chilling roller. To avoid defects in the film or elements arising from differences in the rate at which they are cooled, the thicker and more complex shaped female element 13a, Fig. 3, is cooled by at least one coolant jet 19, slightly upstream of the location at which the element 13a engages the film 16, and upstream of the location at which the male element 12a is cooled by a coolant jet 20. The film may comprise a laminate of plastics, or a laminate with aluminium with the ribs attached to the plastics. The coolant from the jets 19, 20, is preferably water, with the air jets also effecting drying and optionally being on the opposite surface of the film to which the elements are applied. A plurality of the water or air jets may be employed, with the jets each directed at different positions around the periphery of the ribs, Fig. 6, or Fig. 7 (not shown). Further jets may be directed at the same locations at the areas of the film adjacent the elements, Fig. 8, and Fig. 9 (not shown), which comprise lips of the bag which are engaged to separate the closure elements.
Patent GB-666039-A (GB)
Title: Improvements relating to drying apparatus
IPC: F26B11/02
Filed: 1949-08-23
Abstract: 666,039. Drying apparatus. LEGG, Ltd., R., SCHREIBER, P. Q. R., and DICKINSON, W. H. C. Aug. 16, 1950 [Aug. 23, 1949], No. 21922/49. Class 34(ii) Apparatus for drying tobacco comprising a slightly inclined cylinder 4 continuously rotated on rollers 6 so that the tobacco passes down the cylinder and is discharged at the lower end, the cylinder having its upper end formed with openings 8 covered by gauze 10, has nozzles 16 which lie close to the gauze to direct blasts of gas at the gauze to clean it as the cylinder rotates and which are moved in the direction of the axis of the cylinder to traverse the whole area of the gauze. The nozzles 16 lie in a pipe 18 which is continuously reciprocated in the direction of the axis of the cylinder by a cam arrangement operated by a striker 36 on the end of cylinder 4. Warm air passes up the cylinder to dry the tobacco and is drawn through the openings 8 into a casing 12 surrounding the end of the cylinder and thence into a duct 14, the tobacco being fed into the cylinder by means of a shoot 2.
Patent GB-803575-A (GB)
Title: Improvements relating to aircraft
Inventor: JOFEH MARCUS LIONEL
IPC: G05D1/00
Filed: 1955-07-29
Abstract: 803,575. Automatic steering control systems. SPERRY GYROSCOPE CO., Ltd. July 12, 1956 [July 29, 1955], No. 21926/55. Class 38 (4). [Also in Group XXXIII] An aircraft safety-device comprises means for deriving an electrical signal representing the divergence of a control surface from its long-term average position, which signal is applied to a relay or the like to produce a characteristic signal if the first-mentioned signal exceeds a predetermined value. The invention is applied in the embodiment described to a control surface 202 when operated by an auto-pilot 340. The pilot's control column 201 is connected by rod 255, lever 320, rod 282, and floating-lever 280 with the input 261 of a mechanically-operated valve 344 controlling, when a change-over valve 346 is un-energized, a fluid-pressure servomotor 210 connected to the control surface 202 by a rod 218. A follow-up rod 281 recentres the valve input 261 when the surface 202 reaches the appropriate position. When change-over valve 346 is energized, the servomotor 210 is controlled by a valve 345 operated by a transducer 208 energized by an amplifier 248. The latter is energized by a mixer 245, having for one input an answer signal derived from a potentiometer 207 positioned by the control surface, and for its other input a demand signal derived either from an auto-pilot 340 or from a potentiometer 206 driven by the control column 201, according to the position of a switch 341. The signals from potentiometers 206 and 207 are also fed to a differential 268, the amplified resultant energizing a slow response integrating motor 216<SP>11</SP> which trims the datum of a spring feel device 216<SP>1</SP> connected to rod 255. The change-over valve 346 is normally energized through a contact d2 of a self-holding relay D, so that the surface 202 is controlled by the auto-pilot 340 or the control column through an electro-hydraulic system. When the auto-pilot is in control, the control column 201 is centred by the feel device 216<SP>1</SP> to a datum position set by motor 216<SP>11</SP>. Due to the long term response of motor 216<SP>11</SP> the position of the control column and hence the signal derived from potentiometer 206 represents the long-term average of the control surface position, and thus the output of differential 268 represents the deviation of the control surface from its long-term average position. This output is applied to a relay E, and if it is above a predetermined value, the relay opens a contact el, de-energizing relay D, opening contact d2 and de-energizing the change-over valve 346, so that the pilot's control column operates surface 202 through a mechanico - hydraulic transmission. A potentiometer 347 adjusting the sensitivity of relay E is driven by an airspeed or Mach number signal generator 348. A relay C can also de-energize relay D through contact cl, if the output of amplifier 248 is too high. Specifications 760,683, 803,572 and 803,574 are referred to.
Patent GB-642073-A (GB)
Title: Improvements in and relating to electric signalling devices
IPC: H03K17/96
Filed: 1948-08-21
Abstract: 642,073. Electric signaling systems. BROOKE, W., and BALDWIN, H. T. Aug. 21, 1948, No. 22102. [Class 40 (i)] In a mine or like signalling system signals may be sent from any point along the run of a bare or insulated wire X by a person merely touching the wire, thereby increasing the capacity across the grid-cathode of a thyratron V at a central station and causing it to fire. The normal grid bias is adjusted by a potentiometer G connected across the secondary S1 of a mains transformer T, the core of which is earthed so that the grid is earthed for alternating or pulsating current of the frequency in question through the self-capacitance of the winding S1. The capacitance of an operator touching the wire is therefore connected in parallel across capacitance E and the series connected capacitance of S1 and phase shifts the grid voltage so that the thyratron conducts during positive alternations of the anode voltage to energize a relay Z which operates a visual or aural indicator K, J and at 8, 9 may open a control circuit to stop the plant. The rectifier R and condenser U lower the impedance of the relay winding.
Patent GB-1424723-A (GB)
Title: Internal combustion engines
IPC: F02B75/40
Filed: 1973-05-09
Abstract: 1424723 Variable compression ratio IC engines J H BREMS 9 May 1973 [12 May 1972] 22105/73 Heading F1B An I.C. engine comprises primary and secondary pistons 24, 46 movable in respective cylinders 28, 54 which are connected by a passage to allow  movement of gases therebetween independently of the pistons positions, the pistons being operat-  ively connected to cause them to move with a predetermined relationship, such that the secondary piston 46 moves at a higher cycling rate than the primary piston 24, the former completing an integral number of half cycles during each cycle of the latter. The crankshafts 8 and 38 are connected by gearing, for example including a planetary gear set as in Figs. 2 and 3, in which the relative phase of the crankshafts is variable by altering the positions of planetary gears 74. This is done by a servo-cylinder 92 responsive to inlet manifold pressure, engine speed, inlet air temperature and engine temperature and causes the compression ratio to be varied, since for example the minimum combustion chamber volume depends on the phase difference between the pistons, having its smallest value when the two pistons are at T.D.C. together (i.e. no phase difference). The planetary gear set may be replaced by spur gears or a chain or cog belt system. The servo-cylinder 92 may be operated by the engine oil pressure. However, the phase shift system may be operated by an electric motor and lead screw or by a cylinder or bellows actuated by inlet manifold pressure. The axes of the primary and secondary cylinders may be parallel or inclined to one another. The secondary cylinder may be formed in the cylinder head or the cylinder block. The primary cylinder may operate in the two stroke or four stroke cycle. For two stroke engines, the speed ratio of the crankshafts is an integer, but for four stroke engines it may be either an integer or half an odd integer.
Patent GB-688104-A (GB)
Title: Improvements in or relating to endless grinding belts
IPC: B24D11/06
Filed: 1951-09-20
Abstract: 688,104. Endless grinding belt. KRUSIUS, E., (trading as KRUSIUS GEB.). Sept. 20, 1951 [Sept. 20, 1950], No. 22108/51. Class 60. An endless grinding belt comprises two ribbons 4, 5 of textile material coated with grains of abrasive material on one surface and connected together, e.g. by adhesive or sewing, with their uncoated surfaces in contact; the ends 4a, 4b and 5a, 5b of the ribbons are butt-jointed' and the joins of the ribbons are staggered relatively to one another. The ends of the ribbons may be cut at right angles to the belt or may be cut obliquely or furnished with interengaging projections and recesses. The abrasive grains may be applied after production of the belt.
Patent GB-943802-A (GB)
Title: Process for dry cleaning garments and fabrics and apparatus for carrying out said process
IPC: D06F43/02
Filed: 1960-06-24
Abstract: 943,802. Dry cleaning fabrics &c. P. A. J. CHARREAU. June 24, 1960 [July 1, 1959], No. 22239/60. Headings D1A and D1P. In a process for dry cleaning garments, fabrics &c.,dry cleaning solvent is sprayed and jets of compressed air projected on to the materials to be cleaned while they are being tumbled within, but spaced from the bottom of, an enclosure, and removing solvent from the enclosure to maintain the level of the solvent below the materials to be cleaned. The materials may be tumbled in a perforated rotary drum 1 within an enclosure 2 connected by a duct 4 to a conventional evaporating and re-circulating system, the rate of re-circulation being such as to prevent accumulated solvent from reaching the drum 1. Through the nozzles of valve controlled distributer rings 20, 21 there may be directed conical formations f4, f5 of jets of either liquid solvent or solvent vapours carried by compressed air, or compressed air uncharged with solvent. An alternative apparatus is provided with independent perforated tubular distributors for the compressed air and the solvent, respectively, extending axially of the rotary drum.
Patent GB-375116-A (GB)
Title: Improvements in and relating to two-stroke internal combustion engines
IPC: F02B25/00
Filed: 1931-08-06
Abstract: 375,116. Valves; valve gear. DAIMLER-BENZ AKT.-GES., Untert³rkheim, Stuttgart, Germany. Aug. 6, 1931, No. 22315. Convention date, Aug. 6, 1930. [Class 7 (vi).] In a two-stroke engine, admission from a pump 6 through piston-controlled ports 5 is further controlled by a rotary or other valve 7 which is timed to open simultaneously with the uncovering of the ports 5, so as to cause a throttling of the admission at the moment of opening of the ports 5. The cylinder is arranged desaxÚ so that the crank positions E<1>, E<2> for the opening and closing of the ports 5 are not symmetrical with regard to the lower dead-centre. The valve 7 may be arranged opposite the exhaust cam shaft 12, both being driven from the same intermediate gear wheel.