baber/WOPTO huggingface dataset:
Patent GB-1528990-A (GB)
Title: Polishing semiconductor materials
IPC: H01L21/306
Filed: 1975-12-29
Abstract: 1528990 Etching MONSANTO CO 29 Dec 1975 [30 Dec 1974] 52955/75 Heading B6J A III-V semi-conductor compound is polished by applying thereto, in an acid environment, an etchant comprising an aqueous solution of a compound which yields free chlorine under acid conditions and simultaneously mechanically polishing said compound. The acid environment may be obtained by the presence of hydrochloric, sulphuric or nitric acid and the compound may be an alkali metal hypochlorite (e.g. Na or K) or a chlorinated cyanuric acid or salt thereof. The acid and the compound may be supplied via lines 17 and 19 respectively to the surface of a polishing pad 13 mounted on a table 11 rotatable about axis 15. The semi-conductor slice 1 may be mounted on a block 3 by retention pad 9 and biased against the pad 13 via spindle 5. Rinsing water may be supplied through line 25. Suitable semiconductor compounds and process conditions are given.
Patent GB-1249658-A (GB)
Title: Improvements in or relating to servo-control systems, especially for aircraft controls
IPC: F15B9/00
Filed: 1968-11-11
Abstract: 1,249,658. Fluid-pressure servomotor systems. HONEYWELL Inc. Nov. 11, 1968 [Nov. 17, 1967], No. 53391/68. Heading G3P. A positioning system for an aircraft control surface has four redundant channels each of which includes an amplifier 25 which receives a pilots control signal and transmits it to a torque motor 26 connected to a jet tube 52 controlling a servopiston 60. The servopistons control a main valve (not shown) through link 63 and the main valve positions a main servomotor linked to the control surface. A spring 64 provides positional feedback to the jet tube; alternatively, an electrical feedback signal could be transmitted to amplifier 25. If the latter should fail, the large pressure difference created by the jet tube, due to movement thereof by spring 64 following movement of piston 60 by link 63, causes movement of one of pistons 93, 94 to actuate switch 72 to de-energize coil 102 to allow closure of valve 50 thereby stopping flow to the jet tube. If piston 60 should sieze, or, due to lack of complete synchronism, be unable to follow the movement of 63, the pressure difference thereacross eventually causes movement of piston 67 which, via spring 69, moves the jet tube to neutral. This ensures load equalization among pistons 60. Under normal conditions, supply valve 50 opens following momentary closing of switch 80 which energizes coils 86, 102 if pistons 93, 94 are positioned as shown due to normal pressures from the jet tube.
Patent GB-1527640-A (GB)
Title: Welding of steel products
IPC: B23K11/25
Filed: 1976-12-23
Abstract: 1527640 Automatic position control CENTRE DE RECHERCHES METALLURGIQUES - CENTRUM VOOR RESEARCH IN DE METALLURGIE 23 Dec 1976 [24 Dec 1975 17 March 1976] 53765/76 Heading G3R [Also in Division B3] In resistance welding apparatus, for spot welding steel sheets or bars, the relative displacement of the electrodes (which varies with the expansion of the sheets or penetration of the bars into each other) is measured by an inductive detector during welding, and compared with a reference value. Any difference is used to control either welding current intensity, welding time or force between the electrodes, so as to reduce the difference. The apparatus may also include detectors for the electrical energy dissipated during welding, the welding force or the relative speed between the electrodes. The system is said to monitor, and thus control, the quality of the weld whilst it is being made.
Patent GB-1272698-A (GB)
Title: Continuously variable transmission
Inventor: WEBER BERNHARD
IPC: F16H15/18
Filed: 1970-11-13
Abstract: 1,272,698. Variable-speed friction gear. B. WEBER. 13 Nov., 1970 [13 Nov., 1969], No. 54082/70. Heading F2D. An infinitely variable friction gear comprises a friction cap 13, on a driving or driven shaft 10, driving through a number of inclined friction coned countershafts 15 to a drum 25 slidably splined on a driven or driving shaft 23, the drum 25 being axially movably adjusted along the friction cones 15 by a screwed connection 36, 37 controlled by a hand wheel 30 for ratio change, the gear ratio being readily observed at an indicator 40 and a scale (not shown) through a plexiglass window 42. The friction coned countershafts are carried in self-aligning bearings 16 in a plate 6 bolted to a base 1 in which the driving shaft 10 and friction cap 13 are located and retained by fasteners 4 (Fig. 2, not shown). In the Fig. 3 embodiment (not shown), the driving and driven shafts 48, 49 are coaxially arranged one within the other, the rest of the unit being identical with the Fig. 1 embodiment.
Patent GB-1249880-A (GB)
Title: Ventilation system
Inventor: PERSSON SIXTEN
IPC: F24F7/06
Filed: 1968-11-15
Abstract: 1,249,880. Ventilating buildings. LUFTKONDITIONERING AB. 15 Nov., 1968, No. 54318/68. Heading F4V. [Also in Division F2] In an air extraction system in which air is drawn from one or more kitchen hoods 2 through ducts 18, 3 and from other spaces through a duct 5 by a common, fan 1, each hood 2 includes a butterfly damper having a central opening through which air passes when the damper is in its closed position. Each hood includes a control for the damper and a grease filter. The air extraction rate may be controlled by a servomotor which adjusts the fan speed or a damper in the fan inlet or a return damper in parallel with the fan in response to a pressure senser 7. The duct 5 may extract air from toilets or bathrooms. Each damper has a circumferential seal. The openings in the dampers have tapered flanges to reduce noise.
Patent GB-1203592-A (GB)
Title: Tris-peroxides from 1,3,5-triisopropylbenzene
IPC: C07C409/16
Filed: 1967-11-29
Abstract: 1,203,592. Peroxides. WALLACE & TIERNAN Inc. 29 Nov., 1967 [8 Dec., 1966], No. 54434/67. Heading C2C. [Also in Division C3] The invention comprises peroxides of the formula where R 1  is an alkyl radical having from 1 to 8 carbon atoms. Such peroxides are prepared by (a) the reaction of an aralkyl hydro-peroxide andthe appropriate alcohol in the presence of perchloric acid, (b) the mineral acid catalysed reaction of 1,3,5-tris(α,α-dimethyl-α-hydroxymethyl) benzene and the desired t-alkyl hydroperoxide, (c) the transition metal salt catalysed decomposition of a t-alkyl hydroperoxide in the presence of 1,3,5-triisopropylbenzene and (d) the reaction of the sodium salt of the trihydroperoxide and desired dialkyl sulphate. The peroxides are employed as cross-linking agents for polymeric materials (see Division C3).
Patent GB-1245292-A (GB)
Title: Halogeno-pregnadienes and process for the manufacture thereof
IPC: A61K31/573
Filed: 1968-11-18
Abstract: 1,245,292. 2-Chloro-pregnadienes and -pregnatrienes. CIBA-GEIGY A.G. 18 Nov., 1968 [17 Dec., 1967], No. 54564/68. Heading C2U. Novel steroids of the formula (wherein R 1  is a free, esterified or etherified OH group; R 2  is H(OH) or H(OCOCH 3 ), the substituent being in the alpha or beta position; X is H or F ; or R 2  + X is a 9,11-double bond or a 9#,11#-oxido group; and Y is H or a free or esterified OH group, or R 1  taken together with Y represents a cyclic ester group of a dicarboxylic or orthocarboxylic acid) are prepared (1) when X is H or F and R 2  is H(OH) or H(OCOCH 3 ), by addition of chlorine to the #<SP>1</SP>-double bond of the corresponding #<SP>1</SP>'<SP>4</SP>-2-unsubstituted-steroids followed by elimination of HCl from the resulting 1,2-dichloro-4-pregnene; or (2) when R 2 +X is a 9,11-double bond, by elimination of water from the 9α-unsubstituted- 11#-ols. Products containing a 9,11-double bond may be converted via the bromohydrins to the 9#,11#-oxido compounds, which, when required, may then be reacted with HF or an HF donor to give the corresponding 9α-fluoro-11#- hydroxy-steroids. Free hydroxy groups and esterified or etherified hydroxy groups may be interconverted by standard procedures. The 2-chloro steroids of the invention, which are stated to have a thymolytic effect, an inhibiting effect upon the suprarenals and an antiphlogistic effect, may be made up into pharmaceutical compositions with suitable carriers.
Patent GB-550617-A (GB)
Abstract: 550,617. Coating surfaces. DUBILIER CONDENSER CO. (1925) Ltd. June 13, 1941, No. 13666/42. Convention date, June 15, 1940. Divided out of 550,047. [Class 95] [Also in Group XXXVI] A method of applying a metallic coating to a surface of an insulating sheet, consists in pressing on to the surface a stamp carrying a metallic liquid or paste and producing an electrostatic field between the stamp and the surface to be coated, to facilitate the transfer of the liquid or paste from the stamp to the surface. The insulating sheet 10 rests upon a metallic base 8 connected to the positive pole of a D.C. supply and the hand stamp 1, carrying a silver paste 6, is connected to the negative pole of the same supply. The stamp may be provided with mesh 3 and an absorbent pad 4.
Patent GB-1411790-A (GB)
Title: Microwave-excited emission detector
IPC: G01N21/68
Filed: 1972-11-29
Abstract: 1411790 Analysis by micro-wave discharge emission MONSANTO CO 29 Nov 1972 [30 Nov 1971] 55085/72 Heading G1A A sample is analyzed by introducing it into a gas flow within which a discharge is produced by irradiation with micro-wave energy (above 1GHz) selecting a narrow band of frequencies from the light emitted, and measuring the intensity of the band photo-electrically. As shown, Fig. 1, a micro-wave source 1 is coupled by a coaxial cable or waveguide 20 to a micro-wave cavity 2 through which passes a quartz discharge tube 4. The sample is introduced into a He flow in the tube 4 by means of a probe 3 which can be heated. The light emitted by the discharge is analyzed by means of a mono-chrometer 10 (which may utilize a grating) and a photo-multiplier 7. A reference channel is provided by means of beam splitter 13, broadband spectral filter 12 and photo-multiplier 11 to generate a signal representing the background. He radiation which is subtracted from the main measurement by a differential amplifier 8 the output of which is applied to a recorder 9. Sample introduction. The sample may be solid or liquid and is placed on the heating coil 3, of Pt, Re or W, which is then energized through a temperature programme which fractionates the sample so that different components are sequentially introduced into the gas stream to assist in the analysis of components with very close spectral lines. The sample may also be a gas introduced into the He stream by a side tube, or may be a liquid introduced in the form of a vapour or aerosol into a subsidary He flow by means of an ultrasonic nebulizer, Fig. 2 (not shown). Particulate material may be extracted from a gas and introduced into the flow either by passing the gas through a metal frit or sponge to extract the particles and then heating the frit or sponge in a counterflow of He, Fig. 4 (not shown), or by electrostatic precipitation on to a collector electrode followed by heating of that electrode in the He flow, Fig. 5 (not shown). In an alternative arrangement, Fig. 6 (not shown) the light is passed by means of a light guide (80) to four measuring channels each provided with a separate narrow band filter (81) and a photomultiplier (7). A broadband reference channel signal is subtracted from each of the measuring channel signals by differential amplifiers (82) the outputs of which are applied to a recorder via a multi-plexer (84) under control of a programmer (85) which also controls the sample probe heating profile. Mention is made of integration of the signals and provision is made for resetting circuits by the programmer (85). The discharge gas may also be Ar, N, H or Cl. The micro-wave frequency may be 2.45 GHz. The gas outlet may be connected to a vacuum system so that the discharge gas pressure is 1 Torr or less. It is stated that a discharge gas pressure of 10<SP>-5</SP> to 10<SP>-6</SP> Torr may be used in conjunction with a magnetic field and using "photon counters" as detectors.
Patent GB-1374719-A (GB)
Title: Fastening device
IPC: E05C19/14
Filed: 1972-11-30
Abstract: 1374719 Clamp G GRONLUNDS MEKANISKA VERKSTAD AB 30 Nov 1972 [21 Sept 1972] 55455/72 Heading E2B A toggle fastener for a lorry side-board consists of an operating lever 5 pivoted at 4 to a fastening bolt 3 sliding in fixed guides, and a locking shackle 7 for engaging a hook (not shown) is pivoted at 6 to the lever 5, the lever and the shackle being both pressed down by a spring 8. (For Figure see next page)
Patent GB-1427354-A (GB)
Title: Cryogenic fluid supply system
IPC: F17C9/02
Filed: 1973-11-30
Abstract: 1427354 Charging cryogenic tanks; revaporizing discharged liquefied gases UNION CARBIDE CORP 30 Nov 1973 [1 Dec 1972] 55621/73 Heading F4P Cryogenic liquid is transferred upwardly from a supply container 40 to an inverted dispensing container 10, Fig. 2, due to vapour pressure in supply container 40, the gas in dispensing container 10 being vented via pipe 21, 23 to an open vent valve 27<SP>1</SP> and passing through an atmospheric heat exchanger 26 which is used for revaporizing liquid later discharged from the dispensing container 10 when the latter is in its upright position, Fig. 1, liquid sensing means 25a being provided in line 23 upstream of vaporizer 26 so that, during the transfer process of Fig. 2, when the dispensing container 10 is filled and liquid overflows into pipe 21, then the presence of liquid is sensed and causes closing of the vent valve 27<SP>1</SP>. The liquid sensing means 25a is preferably a thermistor which transmits a signal via cable 28, controller 29 and cable 30 to the valve 27<SP>1</SP>. Alternatively a pneumatic liquid sensing means can be employed (Fig. 3, not shown). Supply container 40 has a vertical pipe 55 with a coupling 55 which is attached to a similar coupling 19 on a vertical pipe 16 during the transfer process of Fig. 2, the couplings 19, 55 being of the type which open each other when attached and automatically close upon disengagement. Each container 10, 40 has a pressure-relief valve 20, 46.
Patent GB-1348498-A (GB)
Title: Loom shuttle
IPC: B65H63/08
Filed: 1971-12-08
Abstract: 1348498 Weft feelers SCHNEIDER-GERSTER AG 8 Dec 1971 [10 Dec 1970 3 March 1971] 57101/71 Heading DIE A weft feeler mounted in a shuttle comprises a pivoted drop plate 12 which rests on the weft thread on the spool 2 until the thread is nearly exhausted, when it swings past the spool and activates an electrical switch 8. The switch may be a reed switch which is activated by a permanent magnet 13 in the drop plate. The drop plate may have an adjustable projection comprising a screw 14 which passes through one of a pair of grooves 4 in the spool 2. Weft stop motions. A weft stop motion mounted in the shuttle, Fig. 8 comprises a plate 21 pivoted at 24 which is normally maintained in a raised position by weft passing through a ceramic eyelet 26. Upon weft breakage the plate drops and a permanent magnet 25 in it activates a reed switch 22. In an alternative embodiment, (Figs. 7 and 9, riot shown) the plate is pivoted at its centre and swings up on weft breakage under the weight of and attraction of the magnet 25 for the reed switch 22.
Patent GB-1384553-A (GB)
Title: False twisting device for producing crimps in filament yarn
IPC: D02G1/06
Filed: 1971-12-10
Abstract: 1384553 False twister ODA GOSEN KOGYO KK and OGURA HOSEKI SEIKI KOGYO KK 10 Dec 1971 [11 Dec 1970] 57-5-11/71 Heading DID [Also in Division F2] In a false twister comprising a turbinebladed rotary member having a filament-passage containing a twist pin, the member is rotated by compressed gas and is maintained at most at a predetermined speed by an eddy current brake. Spindle 11, Fig. 2, is rotated by air flowing from one or two ducts 20 to impinge on spindle blades 13, and is radially supported by air bearings 17, 18. Axial spindle loads are resisted by air flowing through ducts 19a to impinge on the end faces of the blades. Alternatively, magnetisable members are mounted on opposing end faces of the spindle, and the bearings, or of a spindle end and a housing, so as to repel one another when magnetised. The speed of spindle rotation is measured by passing light through equispaced slits in the rotating spindle to a receiver which produces a signal varying with the speed of rotation. The signal controls an A.C. voltage supplied to eddy-current brake 25, Fig. 6, comprising pairs of diametrically opposed coils A, B spaced about end 14 of spindle 11, the brake responding to the change in spindle speed to maintain the spindle speed at most at a predetermined speed.
Patent GB-1124770-A (GB)
Title: Ammonia purification
IPC: C01C1/12
Filed: 1966-12-29
Abstract: In a process for removing an acid gas contaminant from an impure ammonia vapour stream containing less than 10% by weight each of acid gas and water, the vapour is scrubbed at a constant of 0 DEG  to 100 DEG  F. temperature and superatmospheric pressure with a concentrated aqueous ammonia solution formed by supplying to and vaporizing in the contactor liquid ammonia at a higher pressure at a rate to maintain the constant low temperature, and water at a rate to maintain in the solution a constant high molecular ratio of ammonia to acid gas of at least 5 to 1; a purified vapour stream is withdrawn containing a small, fixed concentration of acid gas and a small variable amount of water, at a rate to maintain constant the superatmospheric pressure in the contactor; and a portion of the ammonia solution is withdrawn separately, containing the acid gas removed from the impure vapour stream. The impure vapour stream may have contained more acid gas than water, and the purified stream more water than acid gas, on a molecular basis.  The acid gas may be H2S and be present in the impure vapour as more than 0.1 weight per cent, and as no more than 100 p.p.m. by weight (on a dry NH3 basis) in the purified vapour stream.  The withdrawn portion of the ammonia solution may be heated and partially vaporized, returning the ammonia-rich vapours, containing only a minor proportion of the acid gas in the withdrawn portion, to the contactor as part of the initial impure vapour stream, leaving most of the withdrawn acid gas in the unvaporized portion, to which additional water may be added and from which the acid gas may then be stripped at a higher pressure.
Patent GB-1236950-A (GB)
Title: An improved graphic display
IPC: G09G1/10
Filed: 1968-12-10
Abstract: 1,236,950. Electric selective signalling. IWASAKI TSUSHINKI K.K. 10 Dec., 1968 [20 Dec., 1967 (2)], No. 58760/68. Heading G4H. Display apparatus includes a digital/analogue converter 3 (Fig. 1A) the quantum level of which is determined by a variable analogue signal X ES  and a counter 4 receiving clock pulses, the sequence of digital outputs from the counter being converted into analogue form by the converter 3, the converter output controlling. a cathode-ray tube display or an analogue recorder. Preferably a low-pass filter 5 receives the stepped ramp output of the converter and delivers a linear ramp to the display. The analogue signal X ES  may either be derived by converting the digital output X from a digital computer 1 or by attenuating the analogue output of an analogue computer (Fig. 1B, not shown). In the embodiment of Fig. 3 (not shown), X and Y co-ordinates are converted to output signals varying linearly from 0 to X and 0 to Y, these signals controlling the deflection plates of an oscilloscope. In the embodiment of Fig. 7 in which a sequence of co-ordinates x 1 , y i  are delivered by a computer 1, registers 8, 8<SP>i</SP> and accumulators 11, 11<SP>1</SP> feed digital signals representing x i , y i  and #x i =x i  - x i + 1 , #y i =y i  - y i+1  to digital/analogue converters 12, 12<SP>1</SP>, 2, 2<SP>1</SP>, respectively. The analogue signals from converters 2, 2<SP>1</SP> control converters 3, 3<SP>1</SP> (as in Fig. 1) the stepped output signals from these converters being fed together with the signals from converters 12, 12<SP>1</SP> to operational amplifiers 9, 9<SP>1</SP>. The amplifier outputs which vary from x i  to x i+1  and yi to y i+1  are fed via low-pass filters 5, 51 and attenuators 10, 10<SP>1</SP> to the deflection plates of oscilloscope 7.
Patent GB-1421182-A (GB)
Title: Device for weighing railway guided vehicles
IPC: G01G19/04
Filed: 1972-12-27
Abstract: 1421182 Weighing railway vehicles CONRAIL AB 27 Dec 1972 59706/72 Heading G1W A railway vehicle weighing section comprises a foundation beam 3 in one or each rail, the or each beam 3 carrying a weighing rail section 7 and inter-connecting the ends of the normal rail 1. The beams 3 may be supported on sleepers 2 as shown in Fig. 1b, or the beams may be interconnected by transverse beams which replace the sleepers. The ends of the rails 1 are secured against axial movement by means of pegs 13 or by welding. The beams 3 may be of U, Figs. 1a, 1b and Fig. 2a (not shown), or of I, Fig. 2b (not shown) cross section. The weighing rails 7 are pivotably inter-connected by a shaft or torsion bar 8 and are either supported on load cells 9, Fig. 1b or carry strain gauges 16 on their web portions Fig. 3.
Patent GB-1451500-A (GB)
Title: Process for preparing alkylene oxide polymers
IPC: C08G65/12
Filed: 1973-12-29
Abstract: 1451500 Polymerization of alkylene oxides DAICEL Ltd 29 Dec 1973 60146/73 Heading C3R Alkylene oxides (I), e.g. isobutylene oxide, are polymerized by a catalyst comprising a dihydrocarbon zinc (II), an amine (III), water (IV) and an inert solvent (V). At least a portion of I is contacted with III prior to mixing with II and IV. V which is preferably added at the start, is a hydrocarbon solvent free of lone electron pairs and is present at 10-100% by volume, based on I. II may be a dialkyl zinc, e.g. diethyl zinc. III may have the formula RNH 2  where R is C 4-8  tert-alkyl or C 3-8  cycloalkyl having a C 1-6  alkyl substituent on the carbon atom in the α-position to NH 2 . The products have high thermal stability and are obtainable in high yield.
Patent GB-1300565-A (GB)
Title: Improvements in or relating to crate handling
Inventor: O'FLANAGAN MICHAEL
IPC: B65B21/02
Filed: 1969-12-12
Abstract: 1300565 Unpacking bottle crates CANTRELL & COCHRANE GROUP Ltd 11 Dec 1970 [12 Dec 1969] 60674/69 Heading B8C In a method and apparatus for removing and erecting in an upstanding position, two interfitting horizontal arrays of bottles from a loaded crate 1, two crates on conveyer rollers 10 are pushed by ram 22 into the lower compartment of an open-ended double box-structure 11a which is then rotated through 180 degrees to invert the crates, ram 23 then pushes the inverted crates into bay 24 where a tilt frame 42 raises the crates, leaving the bottles resting horizontally on two base/side-plate sections 25, 27 and 26, 28 which are then rotated through 90 degrees by ram 30 to erect the bottles, and finally plates 36, 37 and rams 32, 33 push the bottles laterally on to conveyers 31.
Patent GB-1324280-A (GB)
Title: Branch fitting for connecting a branch pipe to a main and a main  provided with such a branch fitting
IPC: F16L37/00
Filed: 1970-12-22
Abstract: 1324280 Pipe joints INDUSTRIELE ONDERNEMING WAVIN NV 22 Dec 1970 [23 Dec 1969] 60915/70 Heading F2G A branch fitting for joining a branch pipe to an existing pipe main includes a main portion 1 having at least one longitudinal seam 2, integral coupling members 8, 9 and ridges 3 which give the main portion 1 sufficient radial flexibility for the coupling members to engage. In Fig. 1 only one seam 2 is shown and the coupling members 8, 9 are in the form of two pairs of overlapping ear-shaped members. Alternatively, Figs. 5, 6 (not shown), two seams are provided and the coupling members on either side of each seam extend the full length of the main portion. The coupling members when so extended may be tapered so that the parts of the main portion can axially slide one against the other to wedge each other. The branch pipe (not shown) fits into a sleeve 5 which in turn fits inside a collar 4 housing a ring (6), Fig. 3 (not shown), which also seals with both the sleeve 5 and the main pipe (7).