baber/WOPTO huggingface dataset:
Patent GB-1152464-A (GB)
Title: Thyristors
Inventor: BERTIOLI MICHAEL MURRAY
IPC: H01L29/10
Filed: 1965-09-08
Abstract: 1,152,464. Semi-conductor devices. JOSEPH LUCAS (INDUSTRIES) Ltd. 30 Aug., 1968 [8 Sept., 1965], No. 38309/65. Heading H1K. The gate region of an SCR comprises a major portion the junction between which portion and the cathode region is short circuited, and a minor portion to which the gate electrode is applied. The device is produced by lapping and etching an N-type silicon wafer, diffusing aluminium into the surfaces and driving-in the aluminium by heating in air to produce P-type layers, and then heating in phosphorus pentoxide vapour to produce N-type layers. The lower N-type layer is removed and the upper N-type layer, which forms the cathode region, is masked using black wax or a photo-resist and etched. As shown, Fig. F, the cathode region comprises a central mesa from which two arms extend to the edge of the wafer dividing the exposed annular peripheral part of the underlying gate region into a major portion 16a and a minor portion 16b. Boron is diffused into these exposed portions of the gate region to form P+ type surface regions. The junction between the minor peripheral portion 16b and the emitter region 14 is masked and the surface of the wafer is nickel plated and then gold plated to form a gate electrode on minor peripheral portion 16b of the gate region and a cathode electrode on region 14, this cathode electrode extending on to the major peripheral portion 16a of the gate region to short circuit the junction. A plurality of devices may be produced in a single wafer which is then subdivided and the anode regions of the individual devices are soldered to mounting studs.
Patent GB-1319177-A (GB)
Title: Methine dyestuffs
IPC: C07D209/14
Filed: 1971-08-17
Abstract: 1319177 Methin dyes BAYER AG 17 Aug 1971 [17 Aug 1970] 38494/71 Heading C4P Methin dyes of formula (in which R 1  and R 4  are each halogen, 1-5 C alkyl, cycloalkyl, aralkyl, alkoxy, nitro, carbalkoxy, CN, acyl, acylamino, amino, carbamoyl, alkoxy, CN, acyl, acylamino, amino, carbamoyl N-alkyl or N,N-dialkyl or N-alkyl-N-aryl carbamoyl, sulphamoyl or N-alkyl or N,N- dialkyl sulphamoyl, CF 3 , aryloxy, aralkoxy, aryloxyalkyl or carboxylic acid aryl or aralkyl ester; R 2  is H, 1-5 C alkyl, cycloalkyl, aralkyl or aryl; R 3  is H or 1-5 C alkyl or is an alkylene radical joined to the ortho position of aryl ring ring B to form a 5- or 6-membered ring which is optionally alkyl substituted or fused with a further carboxylic ring; R 5  and R 6  are each 1-5 C alkyl, aralkyl or cycloalkyl ; a and b are each 0-3; A is an anion; rings B and D are optionally fused with carbocyclic rings; the aromatic carbocyclic rings of aryloxy-alkyl, aryl, aryloxy, aralkoxy, aralkyl, carboxylic aryl or aralkyl ester groups are optionally substituted; characterized in that at least one R 1  and R 4  radical is aryloxy, aralkoxy, aryloxyalkyl or carboxylic acid aryl or aralkyl ester). The dyes are prepared by conventional condensation reactions. Many pairs of suitable reactants are given (including mixtures, compounds in which ring D is fused to a benzo or cyclohexene ring, and compounds in which R 3  and ring B complete a 3-methyl-2,3-dihydroindole, hexahydrocarbazole, 1,2,3,4-tetrahydroquinoline or 7-methoxy-1,2,3,4-tetrahydroquinoline ring).
Patent GB-958070-A (GB)
Title: Improvements in or relating to continuously treating powders with gases
IPC: C01G49/06
Filed: 1961-10-27
Abstract: A non-ferromagnetic powder is wholly or partly converted to a ferromagnetic state by treatment with a gas by effecting the treatment in a zone along the outside of which an endless conveyer bearing a plurality of magnets moves. The ferromagnetic content is thus selectively conveyed. As shown in the Figure, finely divided Fe2O3nH2O (0 \sEn\sE 1.2) is supplied to glass tube 4 surrounded by heating elements 5 <PICT:0958070/C1/1> which raise the temperature to 300-400 DEG  C. A conveyer belt 6 carries a row of permanent magnets 8 which are moved adjacent the tube 4.  A reducing gas e.g. N2H2 is supplied through nozzle 11 in the upper part of tube 4, thus producing ferromagnetic Fe3O4 which is passed along the tube under the influence of said magnets and passes into a zone of inert gas e.g. nitrogen supplied radially at nozzle 13, said zone preventing admixture of the reducing gas with an oxidizing gas e.g. N2 + air supplied to the lower part of tube 4 by nozzle 15 where oxidation takes place, the temperature being maintained at 230-280 DEG  C., to produce g -ferric oxide which is continuously discharged into collecting chamber 18.
Patent GB-1513466-A (GB)
Title: Acoustic surface wave devices
IPC: H03H3/08
Filed: 1975-09-19
Abstract: 1513466 Surface wave devices MULLARD Ltd 19 Sept 1975 38577/75 Heading H3U An acoustic surface wave device comprises a resonant cavity, with ends 22, 23 defined by reflecting gratings, and elements 33-38 which couple to the standing wave in the cavity and are arranged in a pair of like sets 33-35 and 36-38, the elements being positioned so that: (i) the elements within each set are spaced by #2 or an odd multiple of #/2, (ii) the sets are separated by #/4 or an odd multiple of #/4 (3#/4 as shown), and (iii) the point mid-way between the two sets either coincides with the centre I-I of the resonant cavity or is spaced therefrom by #/2 or an odd multiple thereof, where # corresponds to the frequency of the cavity. The above arrangement of elements 33-38 suppresses signals due to waves reflected or re-radiated from the elements. Two or more pairs of sets may be provided. As shown, elements 33-38 constitute the fingers of an interdigital transducer associated with the resonant cavity; alternatively they may form part of a multi-strip coupler (14, Fig. 1, not shown). The arrangment of elements may be applied to input and output transducers, to coupling devices and to frequency-trimming "dummy" transducers of filter devices. Alternatively the device may be used as a frequency control element in an oscillator.
Patent GB-814427-A (GB)
Title: Improvements in volatile anaesthetic vaporising apparatus
Inventor: EDMONDSON WILLIAM
IPC: B01F23/10
Filed: 1956-12-24
Abstract: 814,427. Respiratory appliances. CYPRANE Ltd. Oct. 18, 1957 [Dec. 24, 1956], No. 39189/56. Class 81 (2). Anaesthetic apparatus using liquid anaesthetic has a by-pass valve by means of which part of the incoming air is made to pass through a vaporizing chamber having a temperaturecontrolled outlet leading to the face-mask. Air enters through a duct, not shown, into a chamber 29 in the body 22 and may then pass around the valve head 26 to a second chamber 24 and so to the outlet 28 leading to the facemask. The valve 26 is, however, mounted on a slidable piston 23, the axial position of which is determined by a spiral groove 38 engaged by a fixed pin 39, and when the head 26 is moved so as to partially obstruct the outlet from the chamber 29 air is deflected through port 31 into the vaporizing chamber 1, containing a series of wicks 13 on perforated metal supports. The outlet 17 from this chamber is controlled by a plate 18 mounted on a temperature-sensitive strip 19 and leads to a port 32, which is now uncovered by an annular recess 34 in the piston 23, allowing communication with a port 35, in the body structure, leading to the exit to the mask. Rotation of the piston 23 opens or closes the exit from the chamber 29, so deflecting a lesser or greater proportion of the air through the chamber 1. When the piston 23 is pressed fully in so that port 32 is closed, a second recess 33 is aligned with the port 31 and vents the chamber 1 to atmosphere through a bore 42.
Patent GB-1379188-A (GB)
Title: Quinazoline compounds and processes for their production
IPC: C07C205/59
Filed: 1973-08-20
Abstract: 1379188 Quinazoline derivatives PARKE DAVIS & CO 20 Aug 1973 [21 Aug 1972] 39326/73 Heading C2 The invention comprises compounds of formula or acid addition salts thereof; wherein R<SP>1</SP> represents -C 2 H 5 , or an n- or iso-propyl group; R<SP>2</SP> represents H or -CH 3 ; n represents 4, 5 or 6; and each of X and Y represents H or -OCH 3 . These compounds may be obtained by reacting an o-aminobenzamide of formula with phosgene. The starting material (B) may be prepared by the following sequence of reactions: 1-(o-alkylthiophenyl piperazine of formula is reacted with a bromonitrile of formula Br-(CH 2 ) n-1 -CN in the presence of K 2 CO 3  and the product reduced with LiAlH 4  followed by hydrolysis to give 1-(aminoalkyl)-4-(o-alkylthiophenyl)piperazine of formula  The product D is reacted with an isatoic anhydride of formula  to produce an o-aminobenzamide of Formula B. According to another sequence of reactions a benzoic acid derivative of formula is converted to the acid chloride by reaction with thionyl chloride, and the acid chloride is reacted with a compound of Formula (D), and the reaction product is treated with a base to produce an o-nitrobenzamide of formula This compound is reduced to form an amide of Formula (B) The compounds according to the invention are reported to have central nervous system depressant activity.
Patent GB-1192970-A (GB)
Title: High Vacuum Discharge Tube for High Voltages
IPC: H01J19/40
Filed: 1967-08-29
Abstract: 1,192,970. Thermionic cathode tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 29 Aug., 1967 [27 Aug., 1966], No. 39440/67. Heading H1D. In a high vacuum discharge tube for high voltages, e.g. a ballast tube for use in colour television receivers, which comprises an anode cylinder 5 closed at one end by a surface 7 perpendicular to the cylinder axis, a cathode 8 outside the anode and surrounded by a cathode screen 10 which has surfaces 13 arranged spaced from and opposite the open end of the anode, an auxiliary screen 15 is provided which is situated surrounding the open end of the anode and between part of the envelope and the cathode screen 10 such that electrons liberated from the surfaces 13 by X-radiation from anode surface 7, which radiation is itself produced by electron bombardment, are prevented from reaching the tube wall and are constrained to move towards the anode cylinder. The auxiliary screen 15 may, as shown, comprise a stepped annular member coaxial with the anode and affixed to the cathode screen 10. Alternatively, Fig. 2 (not shown), the auxiliary screen may be an annular cylinder affixed to the wall of the device, and may be electrically connected to the cathode or to the cathode screen.
Patent GB-827396-A (GB)
Title: Preparation of di-ethyl ketone
Filed: 1956-12-28
Abstract: Diethyl ketone is prepared by reacting ethylene, carbon monoxide and a hydrogen donor in the presence of a rhodium-containing catalyst capable of being dissolved in the reaction mixture under the reaction conditions at 100-300 DEG  C. at a pressure of 1500-5000 p.s.i.g.  An inert solvent such as n-hexane may be used.  Suitable catalysts include metallic rhodium, rhodium oxides, chloride, sulphate, nitrate, rhodium salts of organic acids such as oleic, stearic and soluble rhodium carbonyls.  The catalysts may either be added as a product soluble in the reaction mixture or such a product may be formed in situ, e.g. the carbonyls by reaction of CO with rhodium or a salt thereof.  The catalyst may be supported on conventional carriers, generally in the proportions of 1-40% by weight based on metallic rhodium to the carrier, about 5% being preferred. Preferred hydrogen donors are C3-10 secondary alcohols; others are isoparaffins, certain substituted multiple ring, or partially hydrogenated multiple ring aromatic hydrocarbons and naphthenes; certain other aromatic hydrocarbons with hydrocarbonaceous substituents such as toluene, xylene and ethyl benzene may require the further addition of small amounts of hydrogenation catalysts, such as Ni and Cu.  Isopropanol is preferred; and acetone, the resulting dehydrogenated product, may be recovered or hydrogenated to the alcohol to be recycled.  The process is amenable to batch-type, semicontinuous or continuous operations.  The catalyst may be removed from the liquid reaction products by adding water in the liquid or gaseous form at elevated temperatures and removing the precipitated rhodium, which may be recycled, preferably after oxidation.  An example is given.
Patent GB-903111-A (GB)
Title: Improvements in or relating to machines for finishing concrete surfaces
IPC: E01C23/03
Filed: 1959-01-12
Abstract: 903,111. Road surfacing machines. JOHNSTON BROS. (CONTRACTORS) Ltd., and BONE, A. B. April 12, 1960 [Jan. 12, 1959], No. 39567/58. Class 107. A machine for surfacing concrete roads of various widths comprises a wheeled support frame which runs on forms disposed on opposite sides of the road, a reciprocating smoothing element and brush, both extending transversely of the machine, a grooving roller which can be driven transversely of the machine and means for spraying the road surface with a liquid compound. The support frame, formed of end members 10a, 10b and cross-members 11a, 11b, 12a, 12b, and 13a, 13b, is supported on wheels 14. One pair of wheels on one side of the frame may be adjusted relative to the frame to permit operation on roads of various widths. The smoothing element, Fig. 4, includes a box structure formed by channel members 23 and plates 24 which extends between end rollers 25 and an endless belt 21 which runs over the rollers and presents a smooth lower run which engages the concrete surface. The box structure is extendable and means are provided for tensioning the belt and for moving a fresh section of the belt into the lower run position. The element is supported in each side of the machine by yokes 37 which engage rollers 38 journalled in height adjusting arrangements 40, 41, 42. The brush includes a number of brush elements arranged side by side which are secured to a pair of transversely extending channel members 45, these are supported on each side of the machine by rollers 46 which are carried by yokes attached to a height adjusting arrangement operated by handles 8. The smoothing element and brush arrangement are reciprocated by connecting-rods 61 and 60 respectively connected to cranks 57 and 56 driven by motor 50. The grooving roller 65 is formed with a cutting peripheral flange 66 and is supported on a carriage running on rollers 71 which engage cross-members 18a, 18b. A sprocket 73 secured to the roller axle engages a chain 74 fixed transversely of the frame whereby as the carriage is moved the roller is rotated. The roller is driven by two endless chains 75 which engage the carriage and run over pairs of sprockets 76 disposed on either side of the machine. One pair of sprockets is driven from motor 50. The height of the roller may be adjusted by screw jacks 78 which raise the cross-members 18a, 18b. The traverse of the roller may be adjusted by altering the position of the undriven pair of sprockets relative to the frame and altering the chain length. The spraying fluid is contained in tank 84 and is supplied by cock 85 to a telescopic spraying bar 87.
Patent GB-1244336-A (GB)
Title: Photographic drafting apparatus
IPC: G03B7/08
Filed: 1968-08-19
Abstract: 1,244,336. Photographic draughting apparatus; optical filters. G. CORADI A.G. Aug. 19, 1968 [Aug. 25, 1967], No. 39624/68. Headings G2A and G2J. In a photographic draughting machine of the type in which a spot of light is focused upon a photographic film and moves across it so that a design may be recorded means is provided for varying the intensity of the spot in accordance with the speed of movement of the spot by means of a servosystem which moves an optical wedge across the light beam. The system also comprises means to adjust the spot diameter according to the width of the line required and means to adjust the intensity of the light with optical wedges to effect the same exposure of the film for different spot diameters. Light from a lamp 1 is focused by condenser lens 2a, 2b on to an aperture 4, an image of which is formed by a movable lens 10 at a second aperture 16. A semi-reflecting mirror 14, which may be spectrally selective, is placed between the lens 10 and aperture 16 at 45 degrees to the optical axis. The transmitted light falls on a photo-cell 15 the output of which, together with information on the drawing speed, is fed to a computer (not shown) which adjusts the position of a wedge filter 6 by means of an electric motor 7. The computer also receives information on the size of aperture 16, which determines the width of the line drawn, and positions the movable lens 10 accordingly by means of a motor 11, so that the beam is not attenuated by the aperture 16. The diaphragm aperture 16 may be of the rotary drum or iris type and is provided with a filter or filters the transmission of which decreases as the aperture increases.
Patent GB-1367493-A (GB)
Title: Process and apparatus for burning sulphur-containing fuels
IPC: C01B17/60
Filed: 1971-08-24
Abstract: 1367493 Fluidized bed combustion apparatus PERATHON CORP 24 Aug 1971 [25 Aug 1970] 39666/71 Headings C5G and G10A A process and apparatus for burning sulphur containing fuels, particularly coal, comprises a first combustion zone 1, and a second combustion zone 2 comprising a fluidized bed. The first zone is operated at a temperature of 1400‹F., and a sulphur acceptor material, e.g. limestone is added during combustion to remove sulphur formed during combustion of a coal. Combustion products are passed to a separator 7, and any sulphated limestone and ash are removed and passed to the fluidized bed 2. Carbonaceous fuel is combusted in fluidized bed 2 at a temperature within the range 1700-2100‹F. Air is supplied to maintain the fluidized bed and to provide an excess of oxygen to ensure complete combustion of the fuel. This releases the sulphur from the sulphated limestone in the form of sulphur oxides and regenerates the limestone. The sulphur is removed from the combustion product gas stream in a unit 18 and the gas then passes to an exhaust stack.
Patent GB-1269370-A (GB)
Title: Compressed-air rotary-piston sliding-vane engines for counter-clockwise and clockwise motion
IPC: F01C1/344
Filed: 1969-08-08
Abstract: 1,269,370. Rotary compressors. SCHMID & WEZEL. Aug.8, 1969 [Aug. 29, 1968], No.39771/69. Heading F1F. A reversible rotary sliding-vane compressedair engine of the kind comprising a stator Figs. 1, 2, having an eccentric bore 3 located in a housing 2, a rotor 4 having a plurality of axially-extending slots slidably mounting vanes 5 and symmetrically arranged inlets and outlets 14, 18, includes a closing piece 20 on the stator extending between the inlets and outlets over an angle α, which corresponds to the angle between adjacent vanes and an expansion chamber formed between the eccentric bore and the rotor which extends through more than 180 degrees. Compressed air admitted through an inlet 8 urges a spool valve 12 upwardly and enters the engine through a duct 13 and inlet 14 and also lifts a loose-ball valve 15 to pass through axial and radial bores 16, 17 in the rotor to provide smooth starting of the engine. The spent air is then exhausted through outlet 18, a duct 19 and an outlet 10. When compressed air is admitted through an inlet 9 the engine is reversed with the spool valve moving downwardly, 18 then becomes the inlet and 14 the outlet with the spent air again exhausting through the outlet 10.
Patent GB-1078278-A (GB)
Title: Improvements in fuel injection systems
IPC: F02M51/08
Filed: 1964-10-02
Abstract: 1,078,278. Electric correspondence control systems. ROBERT BOSCH G. m. b. H. Oct. 2, 1964 [oct. 4, 1963], No. 40126/64. Heading G1N [Also in Division F1] Fuel is injected by three out of six electromagnetic injection valves 21 during the unstable period of a transistorized monostable multivibrator 36, this period depending upon (a) the position of the movable core 41 of a transformer 40 which couples the collector of the output transistor 38 to the base of the input transistor 37, and (b) the value of a negative temperature coefficient resistor 67, coupled via a diode 65 into the output collector circuit. The resistor 67 is used to sense engine temperature, and more fuel is thereby injected when the engine is cold. The position of the moving transformer core 41 is controlled by the pressure in the inlet manifold 20, and each cycle of the multi-vibrator is triggered by a double-lobed cam 56 which rotates at half the speed of the crank-shaft and operates a switch 57 to momentarily earth a capacitor 59, the transistor 37 being rendered non-conductive when the switch 57 is opened. Successive output pulses are fed alternately, through an amplifier 34, to injection valve-driving transistors 32, 33, the switch 63 being operated by a single lobed cam rotating at the same speed as the cam 56. Modifications include connecting the n.t. c. resistor 67 to the collector of the transistor 38 Fig. 3 (not shown); or connecting the transformer primary 40 and the n.t.c. resistor 67 to the supply 51, and the two resistors 61, 66 to the collector, the diode being reversed Fig. 4 (not shown). A positive temperature coefficient resistor may be used, and is connected in place of the resistor 66, while the n.t. c. resistor 67 is replaced by an ordinary resistor. The injection valves Fig. 2 (not shown) each comprise a coil (26), a magnetizable housing (25), a fixed iron core (27), and a movable core (29) carrying a nozzle pin (28).
Patent GB-917317-A (GB)
Title: Improvements relating to metal boxes and their manufacture
Inventor: JAMES WILLIAM
IPC: B65D6/32
Filed: 1960-11-26
Abstract: 917,317. Making metal boxes. JAMES Ltd., WILLIAM & H. H. Nov. 23, 1961 [Nov. 26, 1960], No. 40720/60. Class 83 (2). [Also in Group XVII] A method of making a metal box comprises steel blank to form a box having side walls a<SP>1</SP>, a<SP>2</SP> and a gap at each corner and positioning a sheet metal fillet, Fig. 2, internally in each corner so that its arcuate form b lies flush with the external walls of the box and its offset flanges b<SP>1</SP> are attached, e.g. spot welded to the inner faces of the walls.
Patent GB-1154320-A (GB)
Title: Freeze Drying
IPC: F26B5/06
Filed: 1965-09-24
Abstract: 1,154,320. Freeze drying. UNILEVER Ltd. 22 Sept., 1966 [24 Sept., 1965], No. 40741/65. Heading F4G. [Also in Division A2] In apparatus for freeze drying food products, the material is positioned in package containers, Fig. 3 (not shown), having at least two planar parallel vertical sides and a perforated top, which may be hinged to allow filling, and the container is loaded between a series of vertically upstanding planar parallel heating elements within which they snugly fit, Figs. 1 and 2 (not shown). The packages are then subjected to freeze drying conditions and unloaded from within the heating elements and wrapped in impervious film material and subsequently sealed to prevent ingress of water vapour.
Patent GB-1204681-A (GB)
Title: Apparatus for controlling tension in a travelling web unwinding from a web-roll
Inventor: KARAMATA JEAN
IPC: B65H23/06
Filed: 1967-09-06
Abstract: 1,204,681. Feeding webs. ROLPA S.a.r.l. 6 Sept., 1967, No. 40748/67. Heading B8R. In web-tension control apparatus in which a dancer roller 9 is utilized to control a brake 16 on the web-roll spindle, the datum position of the roller axis lies between, and substantially in the plane passing through, the axis of the webroll 4 and the pivot axis 12 of the lever 13, 14. The end of the lever 14 is connected to a double acting piston 29. The left of the piston 25 is loaded hydraulically by a weighted piston 25, and the right of the piston 29 is connected by conduit 31 to the disc brake 16. Manually operated piston 33 is used to compensate for pad wear in the brake. The web-roll 4 is transversely registered by adjusting the position of the brake caliper 18. If a brake shoe is used to engage the web roll spindle, the shoe is shaped to enter into at least one groove. The apparatus is described as suitable for controlling the tension for wires and textile fibres.