baber/WOPTO huggingface dataset:
Patent GB-1002410-A (GB)
Title: Production of lithium salts
Inventor: ARCHAMBAULT MAURICE
IPC: C22B26/12
Filed: 1961-12-05
Abstract: Lithium is extracted from calcined lithium-bearing alumino-silicate by reacting the calcined silicate hydrothermally with aqueous sodium bicarbonate or sodium sesquicarbonate to obtain a slurry containing lithium carbonate and sodium aluminosilicate, and separating the lithium carbonate from the sodium alumino-silicate. The starting material, which may be spodumene, petalite, eucryptite or lepidolite, is calcined and heated with 1 to 12 times its weight of sodium bicarbonate or sesquicarbonate at 165 DEG  to 300 DEG  C. in a pressure vessel.  The slurry may be leached with water in an amount of 165 to 250 times the weight of lithium oxide present, at 0 DEG  to 40 DEG  C., to dissolve the lithium carbonate which is then separated from the sodium aluminosilicate, or the slurry may be contacted with water and carbon dioxide to obtain a solution of lithium bicarbonate which is separated.  The solution of lithium carbonate may be heated at 60 DEG  to 100 DEG  C. to insolubilize its lithium content, crystalline lithium carbonate being separated by filtration or centrifuging, or the solution may be reacted with sodium fluoride, sodium silicate, sodium phosphate or a sodium salt of a fatty acid causing the corresponding lithium salt to precipitate.  Depending on the conditions of the hydrothermal reaction the sodium aluminosilicate may be a zeolite or may be anhydrous.  Examples are given.
Patent GB-1484323-A (GB)
Title: Arrangement for comparing a sensed value with a reference value
IPC: H03K5/24
Filed: 1974-10-09
Abstract: 1484323 Redundant signal systems SIEMENS AG 9 Oct 1974 [9 Oct 1973] 43827/74 Heading H3P The validity of a comparison between a sensed value and a reference value is tested by having at least three independent signals representing the sensed value, comparing each with an independently produced reference value to produce at least three difference signals and comparing the difference signals in pairs to produce a fault signal. Sensed value signals produced by sources M1, M2, M3 are connected to differential amplifiers V1, V2, V3, reference signals set by potentiometers P1, P2, P3 being connected to the other inputs of the differential amplifiers. The difference signals from amplifiers V1, V2, V3 are compared in pairs in circuits VG1, VG2, VG3, and if a fault occurs the channel it is in can be deduced from which of circuits VG1, VG2 and VG3 give a non- zero output. When comparing the outputs of two units DV1, DV2, DV3 the earth potential of one is preferably added to the difference output of the other.
Patent GB-1034752-A (GB)
Title: Thermally stable materials
Inventor: MCCALL ERNEST BRYSON
IPC: C08G61/00
Filed: 1961-12-07
Abstract: Condensation polymers contain units each derived by loss of at least two nuclear hydrogen atoms from two aromatic rings linked to each other directly or through an oxygen or sulphur atom and optionally further bridged between the two rings by an oxygen or sulphur atom or by a methylene group, each of these units being linked to a benzene nucleus through an alkylene radical and there being at least two such alkylene radicals attached to each benzene nucleus. The polymers are obtained by reacting a compound containing two aromatic rings linked as described above, with a haloalkylbenzene containing at least two haloalkyl groups, at above 50 DEG  C., e.g. 75 DEG  C. to 300 DEG C., in the presence of a Friedel-Crafts catalyst.  In examples polymers are obtained from p-xylylene dichloride and diphenyl ether, and from p-xylylene dichloride and dibenzothiophene.  Other starting materials mentioned are p-xylylene dibromide, m-xylylene dichloride and dibromide, and 2,3,5,6-tetrachloro-1,4-xylylene dichloride and dibromide, and diphenyl, 2,4,6-trichlorodiphenyl, 2,21,6,61-tetrabromodiphenyl ether, dibenzofuran, 3-methyldibenzofuran, 2,4,8-tribromodibenzothiophene, 1-benzyldibenzothiophene, 3,7-diphenyldibenzothiophene, and diphenyl sulphide.  Reference has been directed by the Comptroller to Specification 921,048.
Patent GB-939006-A (GB)
Title: Improvements in or relating to sintered ferrite compositions
IPC: C04B35/26
Filed: 1961-12-07
Abstract: 939,006. Magnetic compositions. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Dec. 7, 1961 [Dec. 13, 1960], No. 43946/61. Class 38 (2). A ferrite for e.m. wave transmission with low saturation moment comprises in mols. NiO, 49-50%; CoO, 1.2-1.6%; MnO 2 , 0.8-1.2%; Fe 2 O 3 , 46-41%; Al 2 O 3  3-7%. Mixtures (a) of iron and nickel oxides, (b) of iron cobalt and manganese oxides, (c) of mixtures (a) and (b) and manganese oxide, and (d) of aluminium and nickel oxides, are prepared by finely crushing with distilled water and calcining for two hours at 950‹ C. A mixture of (a), (c), (d) and manganese oxide is finely crushed in distilled water, dried, formed into granules with a polyvinyl alcohol binder, compressed at 1 ton per sq. cm., sintered at 1300‹ C. for two hours and cooled at 50‹ C. per hour.
Patent GB-996131-A (GB)
Title: Improvements in or relating to hydraulic accumulators
Inventor: WILLIAMS IVAN
IPC: E03B11/06
Filed: 1962-11-21
Abstract: 996,131. Hydraulic accumulators. PRESSURISATION Ltd. Feb. 20, 1964 [Nov. 21, 1962], No. 43963/62. Heading F1P. An hydraulic accumulator tank 1, Fig. 1, in a water heating circuit has one or more immersed inflated balls 4 therein and is connected by ducts 13, 13a to an automatic vent device 20 provided with a normally open water level controlled alarm switch (not shown) and which is closed in the event of a fall in water level in the device 20 resulting from bursting of a predetermined number of 'the balls 4. A drop in water level causes device 20 to tilt about a pivot 21 thereby actuating the switch which in turn energizes an air vent valve 22 following which the rise in water level restores the device to its original position. In a modification the vent valve 225, Fig. 4, and alarm switch are activated by separate floats 224, 226, within a chamber 203 connected to the tank 201 by an aperture 228 shielded from collapsed balls by a plate 229.
Patent GB-1522685-A (GB)
Title: Process for the production of a finely divided silica by spray drying
IPC: C01B33/193
Filed: 1975-10-27
Abstract: 1522685 Silica DEUTSCHE GOLDUND SILBER SCHEIDEANSTALT 27 Oct 1975 [7 Feb 1975] 44069/75 Heading C1A In a process for the production of finely divided silica by spray drying a silica suspension containing at least 12% of solids, the particles of which are no larger than 45 Ám in size, the suspension having been prepared with the aid of an acid suspending agent, a base or a basically reacting substance is added during at least part of the spray-drying process or after spray drying (e.g. during discharge or further handling) in order completely or partly to neutralize the acid used as suspending agent and still present in the redispersed filter cake or to adjust the suspension to an alkaline pH and thus to adjust the product of drying to a pH-value of at least 6, as measured on a 5% suspension.
Patent GB-932800-A (GB)
Title: Improved cam type constant support
IPC: F16L3/20
Filed: 1959-12-30
Abstract: 932,800. Resilient mountings. B. T. L. PRICE, and B. P. PRICE. Jan. 11, 1961 [Dec. 30, 1959; Dec. 31, 1959], Nos. 44164/59 and 44340/59. Class 108(3). A pipe support of the kind wherein each of a pair of chains, connected at one end to a supporting spring B and at the other end to a pipe W, passes over an eccentrically mounted sprocket-cam A is characterized in that the eccentricity of each sprocket-cam A is adjustable by locating the pivot axis of the sprocketcam eccentrically on a disc D which is angularly adjustable within a circular aperture in the sprocket-cam A. In a single chain and sprocket arrangement the load of the pipe and the spring act on opposite sides of the sprocket-cam A. Specification 474,008 is referred to.
Patent GB-1323134-A (GB)
Title: Fuel injection and control system
IPC: F02D9/00
Filed: 1970-09-16
Abstract: 1323134 Controlling fuel injection PHYSICS INTERNATIONAL CO 16 Sept 1970 [17 Sept 1969L 44238/70 Heading F1B [Also in division G1] In an I.C. engine fuel injection control system, the pressure of fuel supplied to the injection valves 18A - 18N is controlled in dependence upon the square of air mass flow to the engine by means of a Venturi 44 and a valve arrangement 20, and is prevented from falling below a predetermined value, and the injection valves are opened in sequence for a duration which varies inversely with engine speed and is additionally determined in depending upon a value <SP>#pv</SP>/pa, where pv is the desired fuel pressure and Pa is the actual fuel pressure, this value being equal to unity when the pressure of fuel is above the predetermined value and less than unity when it tends to fall below the predetermined value. As shown in Fig.1, a desired fuel pressure signal Pv is derived from the square of air mass flow by an inductive pressure sensor 60 or, when the air mass flow falls below a predetermined value, by an inductive pressure transducer 54, and an actual fuel pressure signal Pa is provided by an inductive pressure sensor 72. In an all electrical system, Fig.2, the appropriate injection valve is energised when a contact 102 rotated at engine speed makes with respective contacts 104, 106, 108, 110, and is turned off after a duration TS#<SP>pv</SP>/pa, where TS is the time taken for contact 102 to travel from contact 104 to 107. This time interval TS is represented by the amplitude of a signal from a sample and hold circuit 122 which is applied to a circuit 140, Fig.10 (not shown), which also receives the signals Pv and Pa to provide at its output a signal TS#<SP>pv</SP>/pa. A ramp voltage is generated when each of the contacts 104 - 110 is made, and when the respective ramp voltages attain the amplitude of the signal from circuit 140 the appropriate injection valve is closed. In a hydraulic system, Figs. 3 - 9 (not shown), hydraulic parts which become operable sequentially to supply pressure to open their corresponding injection valves, are open for a duration given by the maximum duration which varies inversely with engine speed corrected by the value #<SP>pv</SP>/pa computed from the pressure sensors 54, 60, 72 in the circuitry of Fig. 10 (not shown).
Patent GB-1523633-A (GB)
Title: Sheet stripping from imaging surface
IPC: G03G15/14
Filed: 1975-10-28
Abstract: 1523633 Impression cylinders XEROX CORP 28 Oct 1975 [24 Feb 1975] 44305/75 Heading B6C [Also in Division B8] The impression cylinder 12 of an electrostatographic copying-machine is provided with a transverse convex or concave curve to match an opposite curve of the imaging surface. Alternatively, a curved corona generator may be used.
Patent GB-1489755-A (GB)
Title: Constant supply of vacuum or pressure for vacuum or pressure operated or assisted systems in vehicles
Inventor: MALCOLM JOSEPH
IPC: B60K25/04
Filed: 1974-10-14
Abstract: 1489755 Fluid-pressure trailer braking system J MALCOLM 14 Oct 1974 [26 Oct 1973] 44462/74 Heading F2F [Also in Division F1] A vacuum or pressure unit for operating or assisting in the operation of fluid operated brakes on a vehicle, comprises a pump 111 driven by an electric motor 113, within a tank 112, and a pressure responsive switch 115 which energizes the motor 113 when the vacuum or pressure in the tank is insufficient for proper operation of the brakes. The unit shown is for mounting on a vehicle trailer as a source of vacuum for operating the brakes thereof in unison with the brakes of the towing vehicle. When the brakes of the towing vehicle are operated a stop switch 135 closes a circuit including a solenoid valve 140 and a variable resistance 139 controlled by the brake pedal pressure. Thus the solenoid valve 140 is opened by an amount proportional to the pedal pressure, thereby to connect the tank 112 to a line 124 connected to the brakes of the trailer. A further solenoid valve 142 controls a by-pass line 146 and is normally energized to a closed position by electrical current from a battery on the towing vehicle. In the event of the trailer breaking away the brakes thereof are actuated by the opening of the valve 142. Operation of a switch 153 can cause the opening of the valve 142 to provide vacuum to the brakes during parking.
Patent GB-1243800-A (GB)
Title: Synchronous binary-decimal reversible counter
IPC: H03K21/00
Filed: 1968-09-19
Abstract: 1,243,800. Reversible counters. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 19 Sept., 1968 [22 Sept., 1967], No. 44512/68. Heading G4A. A four-stage reversible decimal counter uses different code combinations for representation of some of the decimal digits according to whether the counter is operating in forward or reverse. In one embodiment (Fig. 3, not shown), the system operates in binary notation, Fig. 1, column H, up to 9 in forward operation, at which point conventional feedback over leads (h 1 , h 2 , not shown) restore all stages with carry in response to the next pulse. In reverse counting the step from 8 to 7 skips codes 13-8 by feedback leads (t 1 , t 2 , not shown). Read-out is effected by AND gates fed by the stages indicated by underlining, read-out for digits 8, 9 being thus unambiguous. In a modification a 2, 4, 4, 1 code is used, Fig. 2, with the skips shown.
Patent GB-946533-A (GB)
Title: Dust pan
IPC: A47L13/52
Filed: 1962-11-26
Abstract: 946,533. Dustpans. B.P. BENZIN & PETROLEUM A.G. Nov. 26, 1962 [Jan. 12, 1962], No. 44607/62. Heading A4F. A dust pan has a substantially conical shell of flexible material having a section 10a of the rim extended to a point 12a to form a substantially triangular shaped lip 12. A rib 13 parallel to but spaced from the two edges 12b, 12c, which are of different lengths, prevents dust from sliding out.
Patent GB-1093698-A (GB)
Title: Automatic fuel ignition and control system
IPC: F23N5/14
Filed: 1966-10-10
Abstract: 1,093,698. Burner control. P. ROMANELLI and A. ALFRED, [trading as RAM DOMESTIC PRODUCTS CO.]. Oct. 10, 1966 [Oct. 11, 1965], No. 45215/66. Heading F4T. Gas burner ignition and control apparatus comprises an ignition element 32 of silicon carbide whose electrical resistance decreases with increasing temperature, the element being situated adjacent the flared end 24 of the burner 22 which is supplied with gas through a pressure regulator 14 and an electromagnetic valve 16. Referring to Fig. 2, in operation of the burner switch 106 is closed with contacts 64 and 68 of switch 60 engaged thus energizing element 32. When the temperature of the element is high enough to ignite the gas its resistance is such that the current flowing through solenoid coil 56 is sufficient to attract plunger 46 against spring 54 and so open gas valve 16. If the gas ignites the flame will further heat element 32 lowering its resistance and allowing more current to flow through coil 56. Solenoid core 50 will then be sufficiently magnetized to attract block 76 carried by switch arm 62, breaking contacts 64, 68 and closing contacts 66, 70. Current now ceases to flow through coil 56 and passes instead through coil 58 holding the plunger 46 in the open position. Coil 58 has a high resistance so the current through element 32 is decreased. If the flame is accidentally extinguished the resistance of element 32 will increase and the current through coil 58 will decrease so that switch arm 62 is released and the ignition cycle is repeated. If the gas is not ignited when valve 16 opens heater coil 90 of switch 80 will cause bimetallic arm 84 to bend opening contacts 86, 88. The current to coil 56 will then be cut off and the plunger 46 return to close valve 16.
Patent GB-1480934-A (GB)
Title: Method of and apparatus for separating fractions of different density contained in ores or other solid materials
IPC: B03B5/02
Filed: 1974-10-18
Abstract: 1480934 Separating ores BARTLES (CARN BREA) Ltd 17 Oct 1975 [18 Oct 1974] 45230/74 Heading B2H A method for separating fractions of different density from an ore comprises feeding the ore onto an endless belt 31 inclined transversely to its direction of movement, subjecting the belt surface to vibration, and supplying washing liquid to the downstream end of the belt. The lighter ore fractions are collected from a side edge or edges of the belt at its upstream end, and the heavier fractions at its downstream end. Middle fractions are collected at a zone including the downstream side edge (or edges) of the belt and the adjacent downstream end. The middle fractions may be recirculated for further separating treatment. The belt is supported between two rollers 32, 33 (Fig. 5, in plan) which may each be tapered outwardly from a central region of greatest diameter; this provides two treatment areas on either side of the central longitudinal axis of the belt. One is fed from a container 34 to centrally disposed inclined feed wells 35, preferably in the form of a suspension. Longitudinal pipes 37 at the centre of the belt direct water onto the downstream area of the belt, and further transverse pipes 38 distribute water across the width of the belt. The rollers are carried on a sub-frame 21 which is supported by wires 22 of adjustable length from a main frame 20. An out-ofbalance rotatably driven shaft 39 vibrates the belt. An adjustable linkage (Fig. 6 not shown) extends transversely beneath the upper run of the belt adjacent each roller, and enables the inclination of the belt to be adjusted. Each roller may be tapered or cylindrical, or may have a tapered outer sleeve. A two-part roller joned end-to-end and having their axes inclined to each other may alternatively be employed.
Patent GB-936372-A (GB)
Title: Aminoacid amides
Inventor: MCKAY ARTHUR FERGUSON
IPC: C01B21/02
Filed: 1961-12-18
Abstract: The invention comprises compounds of the formula <FORM:0936372/IV(a)/1> wherein R in both rings is a hydrogen atom or an alkyl group of 1 to 4 carbon atoms and X is oxygen or sulphur. The new compounds are produced by reacting cyclohexanone or a lower alkyl-cyclohexanone with urea or thiourea in the presence of an inert aromatic hydrocarbon solvent at reflux temperature, and removing water formed by the reaction by azeotropic distillation. Xylene is a suitable solvent and toluene and benzene may be used when admixed with dimethylformamide or dimethylacetamide.  The reflux temperature usually varies from 100 DEG  to 160 DEG C.  Detailed examples are given.  The compounds have a great affinity for oxygen and are useful as oxygen scavengers.
Patent GB-1474709-A (GB)
Title: Stabilising apparatus
IPC: G02B6/06
Filed: 1975-11-24
Abstract: 1474709 Stabilized optical apparatus RANK ORGANISATION Ltd 24 Nov 1975 [23 Oct 1974] 45837/74 Heading G2J  A camera, e.g. a TV camera, comprises a lens 1 and a fibre optic bundle 2 having an input end at the image surface of the lens and an output end at an image-receiving portion 6 of the camera. Either the input end of the bundle 2 is fixed relative to the lens 1 or the output end is fixed relative to the image-receiving portion 6 and the unfixed end of the bundle is mounted for translational movement in two mutually perpendicular directions transverse to the axis of the bundle and for rotational movement about the axis of the bundle. Means are provided for controlling the movement of the unfixed end of the bundle in such a way as to tend to maintain the position of the image at the output end stationary relative to the portion 6. In Fig. 1, the movement of the end of the bundle is controlled by servo-drives 3, 4 and 5 or mechanical link-works coupled to high inertia masses. In a practical embodiment Figs. 3, 4 (not shown), the end of the fibre bundle is mounted on a plate which is movable on horizontal bearings by means of a servo-motor, a splined shaft, a gear-box and a lead screw nut. The horizontal bearings are mounted on a further plate which is movable on vertical bearings by means of a servo-motor, gearbox and lead screw. The servo-drive systems include tachogenerators and electro-mechanical pick-off devices. For rotational stabilization, the end of the fibre bundle is mounted in a rotary bearing and is coupled by a flexible coupling to a flywheel surrounded by damping fluid. The fibre bundle may have a spherical or aspherical input surface to accommodate the field curvature of the lens; the bundle may be moved by the servo-drives about the centre of curvature of the field surface. Cosmetic defects in the fibre bundle may be overcome by the synchronous nutation of the images at the input and output ends of the bundle by mechanical or optical means. In another embodiment, the input end of the bundle is fixed relative to the camera lens and the output end is controlled by servo-drives.
Patent GB-1029760-A (GB)
Title: Improvements in or relating to apparatus for the magnetic recording and reproducing of sound
IPC: G11B25/04
Filed: 1963-11-21
Abstract: 1,029,760. Magnetic recording and playback. V-M CORPORATION. Nov. 21, 1963 [Jan. 25, 1963], No. 46050/63. Heading G5R. In an apparatus for magnetically recording and reproducing sound, a sheet of magnetic material is wrapped around a support having positioning members which project through apertures in the sheet to maintain the ends of the sheet in abutting relation, independently of the precise length of the sheet. In one embodiment, Fig. 1, the sheet of magnetic material 30 is supported by a pair of wheels 10, 12 having sprocket teeth 16 which engage with holes in the sheet, the peripheral length of the sprocket-wheels being less than the length of the sheet. The wheels 10, 12 are driven through a gear chain 22, 24, 26, 28 from a motor, which also drives, via pulley 38, a backup roller 40, positioned beneath the magnetic transducer 36. Guides 32, 34 are provided to retain the sheet on the support. In a second embodiment, Fig. 3, the guide comprises a pair of wheels 44 (similarly arranged to wheels 10, 12 of Fig. 1) and a further similar pair of wheels 48 have bands 52, passing round them. The magnetic sheet 30 is located on the bands 52, with its ends abutting, by means of sprocket teeth 54 which engage with holes in the sheet as before. Further holes in the sheet engage with a sprocket-wheel 60 to provide transverse motion for the head 56 mounted beneath backup roller 58. Guides 62 retain the sheet on the carrier. In a modification, Fig. 5 (not shown), the bands 52 are omitted, the sheet being carried directly on two pairs of sprocket-wheels, with gearing between them to ensure that they rotate in synchronism, and the drive is by a friction wheel acting on the sheet in conjunction with a backup roller. The head may be transversely driven from one of the pairs of sprocket-wheels. In a modification of the first embodiment, Fig. 7 (not shown) only two sprocket teeth are provided to locate the ends of the sheet, the drive being provided by a pair of pinch rollers to ensure that the sheet does not crease. In a further embodiment, Fig. 8, the carrier comprises a split drum 114a, 114b having teeth 118 to position the sheet, any excess length of sheet being taken up by the drum expanding under the force of springs 116.
Patent GB-1431567-A (GB)
Title: Gravity feed shaft furnace
IPC: C21B7/20
Filed: 1973-04-18
Abstract: 1431567 Discharging shaft furnaces ARMCO STEEL CORP 18 April 1973 46051/75 Divided out of 1431566 Heading F4B The discharge end portion of a gravity feed shaft furnace operable at a pressure level different from the surrounding atmosphere is provided with an aligned series of funnelshaped hoppers 46, 48, each of which is connected directly to the inside of the furnace so that the only communication between the treatment and discharge portions of the furnace is by way of the funnels. Each pair of funnels defines a chamber 52 therebetween which is provided with a connection 55 for controlling the pressure therein. The series of hoppers may include more than two hoppers, Figs. 2 and 3 (not shown) and the lowermost hopper may be provided with shut-off valves 58, 60. A plurality of parallel series of coaxial fnunels may be provided.