baber/WOPTO huggingface dataset:
Patent GB-901211-A (GB)
Title: Improvements in gain control arrangements for electronic signal amplifiers
Inventor: BALDWIN JOHN LEWIS EDWIN
IPC: H03G1/00
Filed: 1959-11-23
Abstract: 901,211. Amplifier gain control. BUSH & RANK CINTEL Ltd. Nov. 23, 1960 [Nov. 23, 1959], No. 39620/59. Classes 40 (5) and 40 (6). A two-stage amplifier comprises means for applying signals to the input electrode of the first stage, means for deriving a signal from the output of the second or first and second stages, means coupling the common electrodes of the stages, feed-back means associated with each stage to maintain constant the direct current in the stages and means for applying like variations in direct potential to the input electrode of each stage to vary the gain of the amplifier. In the Figure two triodes 3, 8 have separate cathode resistors and are coupled by capacitor 7. A resistor 10 from the H.T. line to the cathode of valve 8 is chosen so that the stabilized anode current in valve 8 is less than that in valve 3 so that the valves operate over different portions of their characteristics and even order distortion is minimized. The gain control bias is developed across potentiometer 16. In an alternative embodiment, Fig. 2 (not shown), two triodes are coupled by a common cathode resistor and have individual D.C. feedback networks between anode and grid. Both embodiments may be modified by the omission of the input and coupling capacitors for signals including a direct current component. The variation in the direct current level at the output terminal will be due to the gain control and compensation would be necessary. In another modification the grid resistors may be taken to the earth line and the cathode potentials varied to control the gain. Also the gain control bias may be derived from an automatic gain control circuit. The valves may be replaced by transistors.
Patent GB-1189233-A (GB)
Title: Solvent Extraction of Highly Aromatic Charge Stocks
Inventor: BROUGHTON DONALD BEDDOES
IPC: C07C7/08
Filed: 1967-08-30
Abstract: 1,189,233. Solvent extraction process. UNIVERSAL OIL PRODUCTS CO. 30 Aug., 1967 [31 Aug., 1966], No. 39675/67. Heading C5E. A process for recovering aromatic hydrocarbons from a charge stock containing at least 75 weight percent aromatics comprises (a) introducing said charge stock in admixture with a first lean solvent stream into a vertically elongated extractive stripping zone, (b) simultaneously introducing into said extractive stripping zone a rich solvent stream, (c) removing from said extractive stripping zone an overhead fraction comprising aromatic and non-aromatic hydrocarbons, and a bottoms fraction comprising aromatic hydrocarbons and solvent, (d) introducing said overhead fraction into a solvent extraction zone and extracting from said fraction substantially all of the aromatic hydrocarbons therein by contact with a second lean solvent stream, (e) removing from said extraction zone a raffinate stream substantially free from aromatic hydrocarbons, (f) removing from said extraction zone a rich solvent stream containing aromatic hydrocarbons and introducing the same into the extractive stripping zone as said rich solvent stream, and (g) passing said bottoms fraction from said extractive stripping zone to a distillation zone and therein separating said fraction into a product stream containing aromatic hydrocarbons and a third lean solvent stream substantially free from aromatic hydrocarbons. Portions of the third lean solvent stream may be recycled to form the first and second lean solvent streams. Suitable solvents include sulpholane, sulpholene, methyl sulpholane, dimethyl sulpholane, methyl 2-sulphonyl ether, n-aryl-3-sulphonyl amine, 2-sulphonyl acetate, diethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, dimethyl sulphoxide, or N-methyl pyrrolidone. The solvent may contain up to 20% of water. The feedstock may be a gasoline or naphtha.
Patent GB-1208641-A (GB)
Title: Wax-containing extrusion coating composition and method of extrusion coating
Inventor: THOMPSON CHARLES E
IPC: C09J123/08
Filed: 1968-08-21
Abstract: 1,208,641. Extrusion-laminating with wax compositions. CONTINENTAL OIL CO. 21 Aug., 1968 [14 Dec., 1967], No. 39912/68. Heading B5N. [Also in Divisions C3 and C4-C5] Substrates are coated with wax-containing compositions having a viscosity of at least 15,000 c.p.s. at 300‹ F. by a method which comprises (a) heating the composition to 200‹ to 300‹ F., whereby it becomes a viscous liquid, (b) extruding the composition on to the substrate and (c) solidifying the composition on the substrate by operating a laminator chill roll at 15‹ to 40‹ F. below the melting point of the wax component of the composition. Specified substrates are paper, polyethylene, polypropylene and regenerated cellulose films. Preferred coating compositions comprise paraffin wax, an ethylene/vinyl acetate copolymer and a terpene resin. Examples describe the extrusion coating of paper with compositions comprising ethylene/  vinyl acetate copolymers, terpene resins and paraffin wax.
Patent GB-1220142-A (GB)
Title: Improvements in butterfly valve assemblies
IPC: F16K27/02
Filed: 1968-01-12
Abstract: 1,220,142. Valves. FMC CORP. 12 Jan., 1968 [31 Jan.,1967], No. 40076/70. Divided out of 1,220,141. Heading F2V. The description is identical with that of Specification 1,220,141, but the claims relate to the convergence of the sides (88) of the retainer (85) and their co-operation with the outwardly diverging flanges (75) of the seat (52).
Patent GB-942826-A (GB)
Title: Gimbal support for a stable element
Inventor: SLATER JOHN MCELROY
IPC: G01C19/38
Filed: 1960-11-23
Abstract: 942,826. Gyroscopic apparatus. NORTH AMERICAN AVIATION Inc. Nov. 23,1960, No. 40351/60. Heading G1C. A platform; such as a structure 8, Fig. 1, supporting three single axis gyroscopes 14, 16, 18, joined by a shaft 10 to a table 12 carrying a pair of accelerometers 11,13, and supported in a three ring system 20, 30, 40, for universal freedom of movement relative to a vehicle 51 in which it is carried has a velocity damper to avoid the necessity of providing either a mechanical snubber, or infinite acceleration of the gimbals, as a pitch angle of 90 degrees is approached. The structure 8 may be.maintained vertical and in apredetermined azimuth orientation by virtue of the accelerometer and other controls not shown. When angular position pick-off 60 detects movement about the inner roll axis 2 a signal is fed through phase shift network 96, Fig. 3, amplifier 98, variable gain resistor 100, amplifier 103, and power amplifier 104 to a torque motor 57 which acts about the outer roll axis 5 so that axes 1, 2, 3 are maintained perpendicular to one another. An induction tachometer 70, which detects velocity of movement about axis 2, feeds a voltage through phase shift network 108 to generate a quadrature voltage which is connected through amplifier 110 and variable gain resistor 112 to the input of amplifier 103. The output of amplifier 110 is also fed through amplifier 114 to a biased detector 116 which normally does not conduct. However when the vehicle 51 approaches a vertical climb and angular motion of pick-off 60 could produce a signal so strong that instability and physical breakdown could occur, the signal from amplifier 114 is sufficiently great to overcome the bias in detector 116 and a direct current signal is fed through alternating current reject network 118 to amplifier 98 to prevent it from conducting. Thereafter, until amplifier 98 conducts again, torque motor 57 is controlled by the output of amplifier 110 alone. Feed-back amplifier 103 has a feed-back loop through a potentiometer 47 connected to measure angular motion about the pitch axis. Any stray torque at structure 8, which would otherwise cause it to drift, is sensed by gyroscopes 14,16,18, the output of gyroscope 18 being used to drive torque motor 25 and that from gyroscopes 14,16 being fed to a resolver 23 having two coils in quadrative the outputs of which drive torque motors 35,45 respectively.
Patent GB-1085670-A (GB)
Title: Improvements in breathing apparatus
Inventor: DIXON STANLEY REGINALD MARTIN
IPC: A62B7/10
Filed: 1964-10-06
Abstract: 1,085,670. Air Cooling apparatus. COAL INDUSTRY (PATENTS) Ltd. Oct. 1, 1965 [Oct. 6, 1964], No. 40753/64. Addition to 1,008,675. Heading F4H. An air cooler of the type described in Specification 1,008,675 is provided with a trap 15 for condensed water vapour at one end of the inner container 13. The trap comprises a pad of absorbent material which may be withdrawn from the cooler when covers 16, 17 are removed. Air to be cooled flows from inlet 11 to outlet 12 through a space 18 provided with a guide channel 19. Thermal insulation 21 is provided.
Patent GB-966591-A (GB)
Title: Substituted 3,4-dihydro-1,2,4-benzothiadiazine-1,1-dioxides
IPC: C07D417/04
Filed: 1961-11-15
Abstract: The invention comprises compounds of formula: <FORM:0966591/C1/1> where X is hydrogen, alkyl, halogen, amino, alkoxy, carboxy, alkanoylamino, trifluoromethyl or nitro, Y is hydrogen, alkyl or halogen, and R and R1 are hydrogen or alkyl; R also may be alkanoyl. The compounds are prepared by reacting an orthoamino benzenesulphonamide, e.g. of formula: <FORM:0966591/C1/2> with 5-nitrofurfural or a 5-nitro-2-furyl alkyl ketone.  The orthoamino benzene sulphonamide may be prepared by reducing the corresponding orthonitro compound. 2-methylamino-5-chlorobenzene sulphonamide, is prepared by reacting 2,5-dichloro-benzene sulphonamide with methylamine. 2-amino-4-trifluoromethyl-5-chloro-benzene sulphonamide is prepared by chlorosulphonation of 3-trifluoromethyl-4-chloroaniline followed by amination.  The orthonitro benzenesulphonamide may be prepared by reacting the corresponding 2-nitro-phenyl-benzyl sulphide with chlorine and then with ammonia.  4-methoxy-2-nitrophenyl-benzyl sulphide is obtained by reacting thiourea, benzyl chloride and 3-nitro-4-chloroanisole. 2-nitro-4-methylphenyl-benzyl sulphide is obtained by reacting thiourea, benzyl chloride and 4-chloro-3-nitrotoluene. 2,4-dinitrophenyl benzyl sulphide is obtained by reacting benzyl mercaptan and 2,4-dinitrochlorobenzene, and reacted with sodium sulphide and acetic anhydride to obtain 2-nitro-4-acetilaminophenyl-benzyl sulphide. 2-nitro-4-carboxyphenylbenzyl sulphide is obtained by reacting thiourea, benzyl chloride and 3-nitro-4 chlorobenzoic acid. 3-chloro-2-nitrophenylbenzyl sulphide is obtained by reacting thiourea, benzyl chloride and 2,6-dichloro-nitrobenzene. 6-chloro-2-nitrophenyl benzyl sulphide is obtained by reacting thiourea, benzyl chloride and 2,3-dichloronitrobenzene.  The compounds of formula I may be mixed with an antioxidant and carbowax to form an ointment; they also may be mixed with water, lactose, starches, magnesium stearate, vegetable oil, calcium carbonate and talc.
Patent GB-879863-A (GB)
Title: Improvements in or relating to fuel elements for gas-cooled nuclear reactors
Inventor: GIBBONS DAVID JOHN
IPC: G21C3/38
Filed: 1958-12-18
Abstract: 879,863. Fuel elements. GENERAL ELECTRIC CO. Ltd. Dec. 15, 1959 [Dec. 18, 1958], No. 40904/58. Class 39(4). A fuel element comprises a body of fissile material enclosed in a can 5 supported by a beam 9 within a graphite sleeve 4 as disclosed in Specification 857,422, the can having straight fins 7 and four helical swirlers 8 extending between supports 15, 16. To permit removal of the unit 4, 5 from a coolant channel 2 a 3-leg lifting spider 11 is retained in slots 18 formed in the inner wall of sleeve 4 by a screwed graphite collar 14 and mild steel washer 12. Specification 791,011 also is referred to.
Patent GB-1243581-A (GB)
Title: Electric timing circuit
IPC: H03K3/284
Filed: 1969-08-15
Abstract: 1,243,581. Transistor time delay switching circuits. KRAUSS-MAFFEI A.G. 15 Aug., 1969 [20 Sept., 19671, No. 40946/69. Heading H3T. A time delay circuit comprises a potentiometer 5 connected in series with a switching device, shown as transistor, 1 across a supply, a capacitor connected between the tap on 5 and the input of an amplifier, shown as a Schmitt trigger 10, 14, and a constant current device, shown as transistor 20, connected to the amplifier side of the capacitor. When the switch transistor 1 is rendered conducting the voltage at the input of the trigger is reduced by an amount determined by the setting of the potentiometer and the trigger is switched. The capacitor is charged through the constant current transistor until its voltage is sufficient to restore the trigger. A resistor or diode OR gate 2-4 controls the switching transistor 1 and the latter transistor when off allows potentiometer 5 to supply an "on" bias for transistor 14 of the trigger. Further amplifier transistors may succeed the trigger to provide additional and serene sense outputs. The input switch circuit may include a bi-stable circuit which is set to start timing and reset by the output at the end of the timing period. The delay is controlled by the potentiometer and adjustment of the constant current circuit. A lamp 8 connected to the input switch or the output amplifier indicates operation of the circuit. A meter V is switchable into circuit to indicate the potentiometer and thus the time delay, the switch including a back-contact which switches in a resistor equivalent to the voltmeter. A further contact 32 holds the circuit inoperative while the meter is in circuit. The transistors may be formed in an integrated circuit mounted on a printed circuit load. Resistor 24 and diode 25 provide temperature compensation.
Patent GB-1327423-A (GB)
Title: Transistor and method of manufacturing thereof
IPC: H01L27/00
Filed: 1970-08-26
Abstract: 1327423 Semiconductor devices KOGYO GIJUTSUIN 26 Aug 1970 [14 Oct 1969] 41076/70 Heading H1K An FET or a lateral transistor is produced in a substrate having a surface layer of the opposite conductivity type by introducing an impurity of the same conductivity type as the substrate to form a region extending through the surface layer and surrounding a region of the surface layer which is to form the drain region or the collector region of the device to separate it from the source or emitter region. An IGFET is produced by forming an N- type surface layer (100) on a P-type substrate 200 by epitaxial growth or diffusion, forming a mask protecting an area of the surface and diffusing an impurity into the surrounding surface to form a P-type region 2A enclosing an N-type region 1A, opening a window in the first mask and diffusing in an impurity to form shallow N+-type regions 1 and 3A. The mask is then removed and gate insulation 4A and electrode 5A are formed. The N+-type region 3A forms the source and the N-type region 1A contacted by N + -type region 1 forms the drain region, the channel being formed by inversion of the surface of P-type region 2A. A complementary device may be produced and the impurities may be introduced by ion implantation.
Patent GB-1240867-A (GB)
Title: Apparatus for the heating of fluids
Inventor: STOYLE WILLIAM JOHN DOUGLASS
IPC: B01B1/00
Filed: 1968-08-28
Abstract: 1,240,867. Heating fluids for smoke-making &c. CONCEPT ENG. Ltd. 28 Aug., 1969 [28 Aug., 1968], No. 41135/68. Heading A5G. [Also in Division F4] Apparatus for heating fluids, especially liquid and liquid/gas mixtures for generating smoke, comprises a metal block 1 capable of being heated to the desired temperature and having a bore 2 and at least one passage 9 leading to it through the block, there being a second passage 13 also. A plug 5 fits symmetrically in the bore so that a fluid-permeable heating space 7 is formed between the bore and the plug through which the fluid to be heated may circulate. The plug and/or bore may be knurled to provide the passageway for the fluid and the block may contain additional bores (3) and (4) for receiving an electrical heating element and thermostat (see Fig. 2, not shown).
Patent GB-1124255-A (GB)
Title: Improvements in sheet feeding apparatus
IPC: G06K13/107
Filed: 1965-09-28
Abstract: 1,124,255. Feeding sheets. PITNEYBOWES, Inc. 28 Sept., 1965 [30 Sept., 1964], No. 41173/65. Heading B6B. Mounted for co-operation with vertical plates 11, 17 and 18 is a movable pack feed plate 21 which is adapted to be moved towards and away from the plate 11, so as to control the advance of a sheet pile 23. A plurality of air jets 26, each issuing from an angularly disposed aperture 27 in the plate 11 serially propels the sheets 24 in the direction of the arrow 25. Each aperture has an effective crosssectional area of less than 0À0013 sq. inches in a plane perpendicular to the axis of the aperture, and is preferably between 0À00007 and 0À0007 sq. inches. The cross-sectional profile of each aperture has a co-ordinate aspect ratio of less then 2, i.e., where the overall length of said profile, in the plane of the plate 11 so measured in the direction of maximum dimension, divided by the overall profile dimension so measured in a direction perpendicular to said first direction equals a value less then two. Each air jet issues from the plate 11 at an angle (A, Fig. 3) of less than 30 degrees.
Patent GB-1213623-A (GB)
Title: Improvements in and relating to machine tools
Inventor: SILVER DEREK ALAN GEORGE
IPC: B23B29/06
Filed: 1966-09-15
Abstract: 1,213,623. Pre-set tools. W. O. M. JONES. 15 Nov., 1967 [15 Sept., 1966], No. 41320/66. Heading B3T.  In a machine tool, such as a lathe, having a plurality of tool stations each having means for mounting tools, the means comprises a male dovetail member 28 locatable in a slot 66 in the tool station and which is alignable in the slot, in relation to predetermined parameters of the machine tool, by eccentric members 68 which are clampable by screws 69. A tool holder 14 is locatable at each tool station the holder having a female dovetail which is engaged with the male dovetail to locate the tool holder in a precise position on the machine for effecting a machining operation on a workpiece, the tool having been preset in its holder at a position remote from the machine tool. The male dovetail permits transverse location of the tool holder in the tool station, longitudinal location being effected by an adjustable stop on the holder which is adapted to co-operate with one of a plurality of studs in the male dovetail, Fig. 3C (not shown).
Patent GB-1010110-A (GB)
Title: Headgear
IPC: A42B3/14
Filed: 1964-10-13
Abstract: 1,010,110. Helmets. AIR REDUCTION CO. Inc. Oct. 13, 1964 [Oct. 28, 1963], No. 41732/64. Heading A3V. Protective headgear comprises a shell with at least two recesses in which engage lugs attached to head engaging straps, the lugs being integral with means adjustably connected to an adjustable headband. The head engaging straps 117, 118 are supported in a shell 101 by lugs 110 on connecting members 109 removably located within recesses provided in the shell and retained therein by fingers either moulded with the shell if made of fibre glass or plastics or provided on a clip rivetted to a metal shell. Studs 113 on the connecting member selectively engage in holes 104 on the headband 103. A loop of the straps 117, 118 engages in slots in the connecting member, or alternatively the straps may be separately attached. The head band 103 has an end stud for selectively engaging one of a series of holes and has an end lug engaging in a series of slots. A chin strap may be attached to one of a series of rows of slots. The straps 117 pass through slots in a central plate 121 and the straps may be sewn thereto. The strap 117 may be more elastic than the strap 118.
Patent GB-1361724-A (GB)
Title: Ignition system for internal combustion engines
IPC: F02P3/08
Filed: 1972-09-08
Abstract: 1361724 Ignition systems ROBERT BOSCH GmbH 8 Sept 1972 [9 Sept 1971] 41760/72 Heading F1B An ignition system for internal combustion engines comprises first and second discharge circuits each comprising a capacitor 16, 17 and a controlled switching element 20, 22 and each being connected to a primary winding 18, 21 of an ignition transformer 19, a secondary winding 23 of the ignition transformer being connected to at least one sparking plug 24 and at each ignition operation the two capacitors are discharged each by way of its respective discharge circuit, the resonance frequency of the first discharge circuit being at least twice as great as that of the second discharge circuit when a spark appears at a sparking plug. In a modification (not shown) the ignition transformer has a single primary winding and the second capacitor is discharged by way of a choke coil connected in series with this primary winding.
Patent GB-1269697-A (GB)
Title: Preparation of cephalosporin compounds
IPC: C07F7/18
Filed: 1969-08-22
Abstract: 1,269,697. Silylated cephalosporin derivatives. ELI LILLY & CO. 22 Aug., 1969 [23 Aug., 1968], No. 42066/69. Heading C2A. [Also in Division C3] Novel silylated cephalosporin derivatives of Formula VI wherein R<SP>11</SP> is hydrogen or acetoxy, and R<SP>1</SP>, R<SP>2</SP> and R<SP>3</SP> are each hydrogen or a C 1  to C 8  hydrocarbon radical free from aliphatic unsaturation, with not more than two of R<SP>1</SP> ,  R<SP>2</SP> and R<SP>3</SP> bonded to the same silicon atom being hydrogen, and R<SP>10</SP> is hydrogen or the group: are prepared by reacting 7-aminocephalosporanic acid or 7-amino-desacetoxycephalosporanic acid or a salt thereof, with a mono- or bissilylamide of one of the Formulµ I to V wherein R<SP>1</SP>, R<SP>2</SP> and R<SP>3</SP> are as defined above; R<SP>5</SP> and R<SP>9</SP> are each hydrogen or C 1  to C 8  hydrocarbon free from aliphatic unsaturation, R<SP>8</SP> is C 1  to C 8  hydrocarbon free from aliphatic unsaturation; each of R<SP>4</SP>, R<SP>6</SP> and R<SP>7</SP> is hydrogen or C 1  to C 8  hydrocarbon free from aliphatic unsaturation, or R<SP>6</SP> and R<SP>7</SP> together with the common nitrogen complete a heterocyclic ring containing 5 to 6 ring-forming atoms, one of which can be oxygen para to the nitrogen, or 4 to 6 ring-forming carbons provided that R<SP>6</SP> and R<SP>7</SP> together contain not more than 18 carbons and that if R<SP>6</SP> is alkyl with tert. carbon bonded to the nitrogen then R<SP>7</SP> is hydrogen; or R<SP>4</SP> and R<SP>6</SP> together with the attached nitrogens and the carbonyl group form a heterocyclic ring containing 5 to 6 ring-forming atoms and 2 to 3 methylene ring-forming carbon atoms; and Y is a C 3  to C 18  alkylene group with a 3 to 5 carbon chain between the nitrogen and the carbonyl group to which Y is bonded, the reaction being effected in an anhydrous aprotic solvent at - 25 to +50 C. The invention includes a composition comprising (a) a compound of Formula VI above, (b) a silylamide of one of Formulµ I to V above and (c) an anhydrous solvent for (a) and (b) of which the molecules do not contain Zerewitinoff hydrogen. The silylated cephalosporins may be converted to known antibiotically active cephalosporins by reacting with an appropriate acylating agent to give the corresponding N-acylated silyl ester which is treated with a C 1  to C 6  alkanol to give the required cephalosporin which is recovered from the solution preferably as the Na or K salt. Cephalothin, cephaloglycin and cephalexin are prepared in this way.