baber/WOPTO huggingface dataset:
Patent GB-1185347-A (GB)
Title: Lead Frame for Semiconductor Devices and Method for Making Same.
IPC: H01R12/55
Filed: 1967-10-23
Abstract: 1,185,347. Making lead frames for semiconductor devices. ADVALLOY Inc. 23 Oct., 1967 [9 Nov., 1966], No. 48061/67. Heading B3A. [Also in Division H1] A method of making a multiplicity of lead frames for semi-conductor devices comprises providing a flexible strip of metal, vapour depositing a narrower strip of conductive material along one surface thereof, and removing portions of the flexible strip at intervals to produce a repetitious lead frame pattern having integral frame sections with spaced apart lead portions extending within each frame section. Ferrous strip for the frames is checked for correct dimensions and physical properties, degreased and coiled on a steel core, on which the coil sides are straightened. The strip is electron beam heated to facilitate the vapour deposition of a layer of aluminium (38), Fig. 6 (not shown), which has a thickness of 100-300 micro inches. The clad strip 40 is passed through a stamping die, where it is perforated to the frame pattern. The strip of lead frames is checked with an optical comparator, any faulty frames are cut out and the cut ends of the strip spot welded together. The strip is again degreased, liquid vinyl masking 42 is sprayed on and cured in an infra red oven. It is then etched in a sodium hydroxide solution at 160-180 F while preferably subjected to ultrasonic vibrations to remove the unmasked aluminium. The etched strip is rinsed in tap water followed by deionized water and then passed through baths of diluted sulphuric acid, tap water, de-ionized water, alcohol and a drying oven before it is recoiled. The frame is next gold plated, preferably after the application of a layer of nickel plating. The vinyl masking is removed in an acetone tank and samples may be taken as it emerges therefrom for quality control purposes. Any remaining traces of vinyl are removed in a solution of five parts of water to one of sulphuric acid. Substrate units may be secured to the frames while they are still in strip form. The units are of ceramic, e.g. aluminium oxide, and are provided with a thin layer 34 of glass frit, which is heated until it becomes viscous and the leads 26 are pressed into it and become bonded thereto.
Patent GB-1216355-A (GB)
Title: A method of refining crude potassium salts
Inventor: HEYDER WALTER
IPC: C01D3/08
Filed: 1968-10-10
Abstract: 1,216,355. Refining potassium salts. KALICHEMIE A.G. 10 Oct., 1968 [31 Oct., 1967], No.48096/68. Heading C1A. .A crude potassium salt is refined by separating the crude salt in an electrostatic field underground in a mine into a concentrate containing the major proportion of potassium present and a residue containing less than 2À5% by weight of K 2 0, the residue being stowed in the worked out areas of the mine and the concentrate being transported above ground for further refining e.g. by flotation, electrostatic treatment, or solution treatment. In the example silvinite containing 12.5% K 2 0 is crushed and treated with benzoic acid in colloidal silica, the treated ore is then separated in an electrostatic field of 3 kv/cm., the entire process being carried out at the underground temperature of the salt. After separation the concentrate is transported -to the surface and subjected to a flotation treatment with stearylamine as a collector -and pine oil as a frother.
Patent GB-1112917-A (GB)
Title: Cam and roller device
IPC: B65H54/28
Filed: 1965-11-12
Abstract: 1,112,917. Cams. ATELIERS ROANNAIS DE CONSTRUCTIONS TEXTILES. 12 Nov., 1965 [13 Nov., 1964], No. 48210/65. Heading F2K. A rotary cam disc 1 has a grooved periphery 3 having side walls 4, 5 against which bear rollers 6, 7 supported on a bar 1a which is adapted to be reciprocated thereby. The rollers 6, 7 are carried by bearing blocks 6b, 7b which are forced apart by a compression spring 8 arranged on a thickened portion 1b of the bar 1a In a modification, rollers 13, 14, Fig. 2, engage the side faces of a helical rib 10a and are urged together by a tension spring 16.
Patent GB-1486238-A (GB)
Title: Magnetoresistive arrangements
IPC: G01D5/16
Filed: 1974-11-08
Abstract: 1486238 Magneto-resistive elements SONY CORP 8 Nov 1974 [17 Nov 1973] 48460/74 Heading H1K A multiple magneto-resistive element comprises first and second magneto-resistive strip groups A, B, Fig. 1, formed of ferromagnetic material exhibiting anisotropic magneto-resistance and connected in series with each other and spaced apart a predetermined distance, each group A, B including a plurality of magnetoresistance films having parallel main current paths 2A, 2B in series with each other and spaced apart a predetermined distance, an output terminal 15, Fig. 5, connected to a conductor 14 joining the two groups A, B, supply terminals 16, 16<SP>1</SP>, and a power supply 17. The ferromagnetic strips may be of nickelcobalt alloy formed on a glass plate 1, the groups A, B being formed on the same face or on opposite faces thereof. Several configurations of the groups A, B are illustrated, the parameters that vary between them being the spacing of the strips in a group, the spacing of the groups A, B, and the orientation of the strips. The multiple magneto-resistive element 20 has the ability to select one of several wavelengths from a repetitive magnetic signal 10 recorded on a magnetic medium, as shown by mathematical analysis.
Patent GB-994203-A (GB)
Title: Control valve appliances for dispensing pressure fluid
Inventor: BENNETT BRIAN SIDNEY
IPC: B67B7/08
Filed: 1962-12-27
Abstract: 994,203. Valves. BRITISH OXYGEN CO. Ltd. Dec. 19, 1963 [Dec. 27, 1962], No. 48642/62. Addition to 971,161. Heading F2V. [Also in Division F4] A device for controlling the flow of fluid from a puncturable container as described in the parent Specification, is provided with a relief valve 52 for relieving excess pressure in the flow path through a passage 58 in a washer 56. The relief valve may be formed by a bung held over a relief port by a rubber band.
Patent GB-1142456-A (GB)
Title: Photographic hardening baths
Inventor: BARD CHARLETON CORDERY
IPC: G03C5/315
Filed: 1967-11-01
Abstract: 1,142,456. Photographic hardening bath. EASTMAN KODAK CO. Nov.1, 1967 [Nov. 1, 1966], No. 49645/67. Heading G2C. A photographic hardening bath having a pH between 2 and 7 is made by dissolving into an aqueous solution formaldehyde and the bis (bisulphite) adduct of a dialdehyde in which the aldehyde groups are separated by 2 or 3 carbon atoms. Dialdehydes specified are succinaldehyde, methyl-, methoxy- and isopropoxysuccinaldehyde, glutaraldehyde, α- methyl-, #-methyl-, α: α-dimethyl, α:#- -dimethyl-, α-methyl-#-ethoxy- and α-butoxyglutaraldenhyde, maleic dialdehyde and butyl maleic dialdehyde and cyclopentanedi-carboxaldehyde. The bath may contain a buffer such as an alkali-metal diacetate (acetylacetate) and an alkalimetal acetate, and alkali-metal sulphates and bromides, acids such as acetic, sulphuric, phosphorous or phosphoric acids, and inhibitors such as dioxane, acetyl acetone, C 15  - C 16  aliphatic alcohols, aromatic sulphonic acids, Kojic acid and amino aliphatic acids may also be present.
Patent GB-1355329-A (GB)
Title: Record sleeves
IPC: B65D85/57
Filed: 1970-10-22
Abstract: 1355329 Gramophone record sleeves N J GARROD 8 Oct 1971 [22 Oct 1970 15 April 1971] 50250/70 and 9567/71 Heading B8P In a record sleeve made from one or two blanks and having three closed sides with a spine connecting the side panels at least adjacent the open edge the closure for the fourth side comprises a flap folded on itself forming portions 3-7 the portions 4 and 5 being adhered together and portions 6, 7 being movable relative to portion 3 and panel 2. In one form, Fig. 3, the portions 7 are mitred to avoid flaps 11 on the side spines, in a second embodiment (Fig. 4) the portion 7 is confined to the centre of the main panels on which the record edge bears, and in a third embodiment (Figs. 5 and 6) the portion 7 extends to the full width of the sleeve and is held beneath flaps 11 at its ends.
Patent GB-1507480-A (GB)
Title: Carburettor for internal combustion engines
IPC: F02M17/04
Filed: 1975-12-09
Abstract: 1507480 Spray carburetters HAROLD PHELPS Inc 9 Dec 1975 [19 Dec 1974] 50404/75 Heading F1H The flow of fuel to a main nozzle 22 is stopped when the throttle valve 28 is closed, an idling nozzle 82 opening downstream of the valve providing fuel for slow running and the nozzles receiving fuel from a return line 38 between the pump 12 and the tank 32. In the embodiment shown a diaphragm 84 subject to the suction downstream of the valve 28 operates a lever 98 pivoted by a sealing ring 102 to move a ball-valve 104 into engagement with its seat 106 when the valve 28 is closed. In a second embodiment, Fig.3 (not shown), the valve 28 engages a cam surface (126) at one end of the lever (98') when the valve is closed. The pump diaphragm 60 is operated by pressure pulsations in a chamber 64 communicating with the crank-case of an associated two-stroke engine. The Venturi 18 located in the induction passage 24 by the nozzle 22 has an annular recess 21 in its downstream end to inhibit back flow from the passage downstream of the Venturi.
Patent GB-990952-A (GB)
Title: Process and apparatus for the wet treatment of longitudinally extending textile material
IPC: D06B3/04
Filed: 1963-12-20
Abstract: 990, 952. Textile treating apparatus. CILANDER A.G. Dec. 20, 1963 [Dec. 20, 1962], No. 50472/63. Heading D1L. In a process for the wet treatment of longitudinally extending textile materials, the material is guided and continuously conveyed through a tube system which is continuously traversed by treatment liquid and which consists of tubes arranged horizontally or slightly inclined, one above the other and connected in series to one another at adjacent ends, and the material moves opposite to the flow of treatment liquid and the treatment liquid is conducted in such quantities and at such a velocity that the tube cross-section is only partially filled with treatment liquid over at least a part of the tube system. The apparatus shown comprises two upright end covers 1 and 2 of rectangular cross-section with horizontal tubes 4 of circular cross-section interconnecting them. The end covers 1, 2 are sub-divided by horizontal partitions 6 into chambers 7, the upper chamber 7 of end cover 1 being connected to an inlet union 9 and the lowermost chamber of the same end cover being connected to an outlet union 10. Each chamber 7 has a guide roller 11 for the material 12 the rollers being free to rotate or driven. The material 12 enters at the bottom through the discharge union 10 and leaves at the top through inlet union 9 whilst treating liquid 13 is supplied under pressure to union 9 and flows in the opposite direction. The rollers 11 are preferably located so that the material 12 is located in the-lower half of tubes 4 so that it travels at least partially beneath the liquid level throughout the entire length of the tube system and if preferred the treatment liquid can be introduced at different points of the tube system.
Patent GB-996845-A (GB)
Title: Liquid surge-damping apparatus
Inventor: PARTOS ALFRED
IPC: F04B11/00
Filed: 1963-12-20
Abstract: 996,845. Pressure-relieving devices. COMMISSARIAT A L'ENERGIE ATOMIQUE. Dec. 20, 1963 [Jan. 17, 1963 (2)], No. 50511/63. Heading F2V. Appearance of a shock wave in a pipe connected to the inlet 5 of a surge damping device 2 causes the liquid level in a tank 1 to rise and lift a float 6 which opens an electromagneticallyactuated valve 12 to admit pressure gas, e.g. air or nitrogen, into the tank and so oppose the ascent of the liquid and dissipate the energy stored therein. When the liquid falls to the level of another float 7 the valve 12 is closed, whereupon the liquid level gradually returns to equilibrium by a number of upward and downward movements. The surge energy is also mechanically damped by a valve disc 32 in an aperture in a disc 29 across the tank 1, which disc is loaded by two opposing springs 36, 39, the tensions of which are determined by a hand wheel 40. An extended transparent tube 19 enables the liquid level to be observed whilst a pair of gauges 20, 21 register the gas and liquid pressures; excess pressures are dealt with by valves 22, 23 respectively. A venting valve 25 is provided so that the tank may be emptied via a discharge valve 26.
Patent GB-1130078-A (GB)
Title: Process for preparing amides directly from aldehydes or alcohols
IPC: C07D307/68
Filed: 1966-11-11
Abstract: 1,130,078. Amides. SHIONOGI & CO. Ltd. 11 Nov., 1966 [7 Dec., 1965], No. 50563/66. Heading C2C. Amides are prepared by reacting the corresponding alcohols or aldehydes with NH 3  or an alkylamine, and nickel peroxide, in an inert solvent at below 10‹ C.
Patent GB-1350950-A (GB)
Title: Raman spectrometer utilizing a tunable source of coherent light
IPC: G01J3/44
Filed: 1971-11-01
Abstract: 1350950 Roman spectrometer BENDIX CORP 1 Nov 1971 [5 Nov 1970] 50693/71 Heading G2J [Also in Division G1] In a Roman spectrometer 40 for analysing a sample 13 the source of coherent radiation 41 is frequency tunable over a selected frequency range. The source 41 may be either a tunable dye laser or a tunable parametric oscillator. Preferably the spectrometer includes two diffraction gratings 43, 44 which are fixed. The frequency tuning is in the direction of increasing frequency. The output beam is fed to a photo-multiplier 39. Alternatively the frequency shifted output from the sample passes a selective filter e.g. a prism, interference filter or cut-off filter before being incident on a detector.
Patent GB-1019674-A (GB)
Title: Process for the stabilisation of high molecular weight linear thermoplastic polycarbonates
IPC: C08K3/014
Filed: 1963-12-31
Abstract: Polycarbonates containing small quantities of moisture are stabilized against degradation whilst molten by adding to the polycarbonates, before melting, from 0.001 to 2% of an inorganic acid of pentavalent phosphorus or an anhydride, ester or partial ester thereof, an inorganic acid of boron or an anhydride, ester or partial ester thereof, or boron phosphate. The stabilizers may be added to a solution obtained by reacting a dihydroxy compound with phosgene or a bis-chlorocarbonate, or to the product obtained by transesterification of a dihydroxy compound with a carbonate ester. They may be added dissolved in an organic solvent or as a concentratde solution in a polycarbonate. Examples describe the stabilization of the polycarbonate of bisphenol A.
Patent GB-1211884-A (GB)
Title: A device for filling envelopes
Inventor: GOMBAULT JACOBUS FREDERICUS
IPC: B43M5/04
Filed: 1967-11-13
Abstract: 1,211,884. Coating apparatus. HADEWE EERSTE NEDERLANDSE DUPLICATORFABRIEKEN N.V. 13 Nov., 1967 [29 June, 1967], No. 51554/67. Heading B2L. [Also in Division B8] A upwardly facing flap of an envelope is moistened or gummed by brushes 40 which are oscillated under the control of a feeler 46 detecting the envelope so that only the proper portion of the flap is gummed or moistened. The brushes are supplied from a wick 41 dipping in a reservoir 42 the envelope is fed, and the flap opened, as described in Division B8.
Patent GB-1240217-A (GB)
Title: Process for oxidizing saturated hydrocarbons
Inventor: BOUTRY PIERRE
IPC: C07C5/42
Filed: 1969-10-22
Abstract: 1,240,217. Oxidizing paraffins. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. 22 Oct., 1969 [28 Oct., 1968]; No. 51810/69. Heading C5E. Olefins and/or diolefins are prepared by continuously (a) contacting at least one paraffin with iron, cobalt or nickel molybdate in the absence of free oxygen and (b) oxidizing the molybdite produced at least partly to molybdate by contact with a gas containing free O 2  in the absence of paraffins, before recycling the molybdate to (a). Step (a) may be carried out at 400-800 C. and 0À5-20 kg./cm.<SP>2</SP>. The molybdate may be on a fixed or fluidized bed which may be successively contacted with an inert gas, paraffin feed, more inert gas and free O 2 -containing gas. Examples describe the production of butene and butadiene and of isoprene and isoamylene.
Patent GB-1244203-A (GB)
Title: Improvements in papermaking machines
Inventor: MCLAREN ALEXANDER CHALMERS
IPC: D21G9/00
Filed: 1968-11-01
Abstract: 1,244,203. Papermaking. BERTRAMS Ltd. 24 July, 1969 [1 Nov., 1968], No. 51908/68. Heading D2A. A size press and/or breaker stack is movably mounted so as to enable it to be withdrawn laterally as a complete unit from the papermaking machine. The unit may run on tracks extending across the machine, and into a space adjacent the machine, the press being provided with rollers and wheels on track. A spring- loaded plunger may be provided at one side of the unit, which plunger locates in a hole to lock the unit in operative position. A stanchion or stanchions adjacent the side of the machine remote from the space adjacent may carry a drive shaft and coupling for a roll in the unit. A hood may be provided, with a slidable side portion to cover the aperture through which the size press is withdrawn. The unit may be connected by cables and pulleys to an arrangement which moves the unit, e.g. hydraulic, pneumatic or electrical means.
Patent GB-1453965-A (GB)
Title: Electron-emissive cathodes
IPC: H01J9/12
Filed: 1973-11-09
Abstract: 1453965 Photocathodes RCA CORPORATION 9 Nov 1973 [15 Jan 1973] 52141/73 Heading H1D A photocathode comprising an A 3 B 5  semiconductor coated with a Cs containing work function reducing layer is prepared by exposing the semi-conductor to Cs below 100C. until the photosensitivity passes a peak, increasing the Cs concentration and the temperature above 100C., maintaining the concentration and temperature constant until the photosensitivity stabilizes then reducing the concentration and temperature simultaneously. A photomultiplier tube comprises a metal shield 18, heater 22, metal plate 20 supporting a photocathode 26 of monocrystaline In 1-x Ga x As or GaP, a grid 28 through which incident light passes at right angles, Cu-Be dynodes 30, anode 32, sources of Cs and O (42), (42), Fig. 1 (not shown), a Pt-Sb bead (43) and a layer 44 of Sb on the tube envelope opposite the bead. The layer emits Cs when heated, after initial exposure to Cs vapour and absorbs it on cooling. The tube is baked at 350 C. and evacuated. When cool the cathode is heated to near decomposition temperature to provide a suitable surface. After cooling to room temperature the cathode is exposed successively to Cs and O until its photosensitivity passes a peak. This is repeated until a maximum sensitivity is reached. During this process some Cs is absorbed by the layer 44. The tube is heated to 150 C. causing the layer 44 to emit Cs. The increased Cs concentration prevents Cs being lost by the cathode. On cooling Cs is absorbed by the layer 44. The cathode may be exposed to F instead of O or to Cs only. The layer 44 may comprise Bi, An or graphite.
Patent GB-1169877-A (GB)
Title: Improvements in or relating to Regulating Systems for Electrical Generators
IPC: H02J7/22
Filed: 1966-11-23
Abstract: 1,169,877. Automatic voltage control. ROBERT BOSCH G.m.b.H. Nov.23, 1966 [Nov.24, 1965], No.52412/66. Heading G3R. A voltage regulator for a short wound generator 11, e.g. an alternator with a rectified output, having output leads 12, 13 comprises a contact arm 17 which has a double contact thereon and which is movable such that in a first position a first portion 22 of the double contact engages a back contact 23 for energizing the field winding 15 and in a second position the second portion 25 of the double contact engages a fixed contact 26 to short-circuit the field winding 15 which, when the arm 17 is in a position intermediate the contacts 23, 26, receives energizing current from lead 12 by way of a p.t.c. resistor 28. A choke 16 is connected as shown in the circuit between the arm 17 and the field winding 15, and the arm oscillates continuously in known manner, under the control of a regulator coil 19, between its various switching positions so that the output voltage on leads 12, 13 is maintained constant. The Specification gives preferred values for the p.t.c. resistor 28 and choke 16, and specifies suitable materials for the contacts 22, 23, 25 and 26.
Patent GB-1376189-A (GB)
Title: Mask for facsimile scanning apparatus
IPC: H04N1/409
Filed: 1971-11-12
Abstract: 1376189 Copying for scanning XEROX CORP 12 Nov 1971 [12 Nov 1970] 52587/71 Heading H4F A facsimile transmitter is provided with a mask to provide a desired transmission characteristic in the vertical direction (at right angles to the scan direction of the apparatus) to light reflected from a scanned document, a slit being provided for the required transmission characteristic in the horizontal direction. The mask, which is a pattern of light and dark areas recorded on a substrate, has a transmission, shown in Fig. 9c, which is the modulus of a theoretical transmission sin#s/d/#s/d where d is the scan line separation and s is the distance from a predetermined point on the mask. To achieve this theoretical transmission the light transmitted through portions of the mask corresponding to positive values of the theoretical transmission are connected by fibre optics to one photosensor and the light transmitted through the portions of the mask corresponding to negative values of the theoretical transmission are connected by fibre optics to another photosensor, the photosensor outputs being subtracted to provide a signal determined by the theoretical transmission. An array of photosensors may alternatively be provided, the outputs being added and subtracted as desired.
Patent GB-1304553-A (GB)
IPC: C07C409/00
Filed: 1970-11-05
Abstract: 1304553 Solutions of liquid acyl sulphonyl peroxides PENNWALT CORP 5 Nov 1970 [7 Nov 1969] 52727/70 Heading C2C Novel solutions of a liquid acyl sulphonyl peroxide which exhibit no solid formation or phase separation at a temperature of - 10 C. are made by dissolving a liquid acyl sulphonyl peroxide of the formula wherein R<SP>1</SP> and R<SP>11</SP> are each a (C 1 -C 12 ) alkyl radical or a (C 4 -C 12 ) cycloalkyl radical having from 4 to 10 ring carbon atoms in a polar or polarizable liquid which is a solvent for the peroxide. R<SP>1</SP> is most suitably a (C 1 -C B ) alkyl radical with R<SP>11</SP> being a (C 4 -C 10 ) secondary alkyl or a cycloalkyl radical having 5 or 6 ring carbon atoms. Suitable solvents include aromatic, nitroaromatic or haloaromatic hydrocarbons, polyhaloalkanes or -alkenes, (C 2 -C 4 ) alkyl cyanides, dialkyl ethers, heterocyclic ethers having C and O atoms in the ring.
Patent GB-1439706-A (GB)
Title: Smokeless flaring of combustible gases using supercritical  venlocity steam
IPC: F23L7/00
Filed: 1973-11-13
Abstract: 1439706 Flare stacks JOHN ZINK CO 13 Nov 1973 52744/73 Heading F4T Apparatus for the smokeless flaring of combustible gases comprises a flare stack 10, Fig. 2, having a tip 18, a plurality of steam injection nozzles 12 which supply steam from a manifold 24 in a direction inwardly and upwardly above the tip into the burning gases, each nozzle including an insert 30, Fig. 3A, which has formed therein an inlet section 34, a throat section 36 and an expansion section 38. Each nozzle may be formed by an insert 42, Fig. 3B, wherein X is 0À5 to 2 D and Y is 1À05 to 1À50 D and Z is 0À2 to 0À6 D. The nozzles are located so as to achieve optimum air entrainment into the combustible gas stream and to cause turbulence therein, e.g. the nozzle outlets may be 1 inch above the tip of the stack and a distance D, the nozzle throat diameter, outward from the periphery of the gas stream emerging vertically from the stack with the nozzle axes at 50 to 80 degrees to the horizontal, or these dimensions may respectively be 3 inches, 2D and 30 to 45 degrees, or 4 inches, 4 D and 20 to 30 degrees.