baber/WOPTO huggingface dataset:
Patent GB-1219305-A (GB)
Title: Separating thorium from rare earth metals
Inventor: HANSEN ROBERT DOUGLAS
IPC: C01F15/00
Filed: 1968-03-21
Abstract: 1,219,305. Separating thorium from rare earths. DOW CHEMICAL CO. 21 March, 1968, No. 13741/68. Heading C1A. Thorium values are separated from rare earth metals when both are contained in an aqueous acidic solution by (1) contacting the aqueous solution with a water-immiscible extractant comprising a mixture of (a) a dialkyl orthophosphoric acid, and (b) one or more of a trialkyl phosphate, a dialkyl alkylphosphonate, an alkyl dialkylphosphinate and a trialkyl phosphine oxide; each alkyl group having 4-18 carbon atoms; the molar proportions of (a) and (b) being 3 : 1 to 1 : 3; (2) separating the phases; (3) contacting the organic extract with either 6-12 molar HCl or 0À5-12 molar HNO 3  and (4) separating to produce an organic phase containing the thorium and an aqueous phase containing the rare earth metals. Ferric ion may also be present in the aqueous solution. The extractant may be used directly or in a solvent, for example hydrocarbons, halogenated hydrocarbons or ethers. The organic phase may be contacted with 10% HF to precipitate ThF 4  and the rare earth metals may be obtained from the acid medium by partial distillation and adding oxalic acid or NaOH to precipitate the R.E.M. values. The source liquor may be uranium depleted leach liquor, and may contain ferric iron, and the process may be continuous or batchwise, using for example, simple mixing tanks, mixing settlers, direct or counter current flow columns. The examples use di-(2-ethyl hexyl) orthophosphate + tributyl phosphate in kerosene as extractant.
Patent GB-1496707-A (GB)
Title: Video signal reproducing apparatus
IPC: G11B20/02
Filed: 1975-04-03
Abstract: 1496707 Television recording systems SONY CORP 3 April 1975 [8 April 1974] 13751/75 Heading H4F In an arrangement for reproducing a television signal, e.g. an NTSC signal, from a record medium, e.g. magnetic tape, on which each field is recorded on a respective track, the tracks being parallel, the colour signal passes through an automatic gain control circuit which is prevented from changing in gain during the inter-field period so as to prevent colour flicker at the top of the reproduced picture. The arrangement shown in Fig. 1 employs two read heads 1A, 1B disposed 180 degrees apart on a rotating head drum. The outputs of the heads are selected alternately by a switch 3 controlled by a bistable 4 triggered by switching pulses at field rate from two fixed magneto-electric sensors 5A, 5B, disposed 180 degrees apart to sense a magnet mounted on the drum head. A photo-electric sensor system may be used instead. High pass filter 7 extracts the luminance signal, which may have been recorded as a frequency modulated signal for example, and passes it via limiter 9, demodulator 10 and low pass filter 11 to adder 12 where it is combined with the chrominance signal. The chrominance signal is extracted from the read heads by low pass filter 8, converted (13) on to the required chrominance sub-carrier, filtered (15) and passed via gain controlled unit 16 to adder 12. The gain of unit 16 is controlled in accordance with the amplitude of burst signals extracted from the chrominance signal by a burst gate 18 enabled by line sync pulse detector 20. The switching pulses from sensors 5A, 5B also pass to a unit M, comprising differentiators 22A, 22B, which causes a unit 24 to generate a muting pulse coincident with each rising and falling edge of the switching pulses. The muting pulses may be applied the control input of unit 16 (Fig. 4, not shown) to hold its gain or may earth the chrominance signal, thereby preventing change in gain of unit 16. Since the muting pulses are inherently coincident with any noise pulses resulting from the switching of switch 3 such noise cannot cause change in gain at 16 whether or not it occurs during a burst.
Patent GB-302118-A (GB)
Title: Improved mounting for mill-stones
IPC: B02C7/10
Filed: 1928-05-10
Abstract: 302,118. Kristensen, E. S. May 10, 1928. Disc mills.-In a bearing device for mills of the kind which comprise a top stone 1 and a bottom stone 10 whereof the bottom stone is movable and the top stone is stationary, the top stone hangs in a stirrup 2 secured to the stone by bolts 3 and is connected to a shaft 5 by a ball pivot in a strap 4 formed on the shaft. The top stone is adjusted in relation to the bottom stone by means of the shaft 5 which is screwed and is operated by gear wheels 6, 7, the stone being guided by projections 9 in guides 8. The ends of the projections may be of spherical configuration.
Patent GB-832614-A (GB)
Title: Improvements relating to data storage apparatus
Inventor: WOLFENDALE FREDERICK CALEB
IPC: H03M1/00
Filed: 1955-05-13
Abstract: 832,614. Electric selective signalling. ELECTRIC & MUSICAL INDUSTRIES Ltd. April 30,1956 [May 13, 1955], No. 13829/55. Class 40(1). The invention relates to apparatus for converting a digital code to a voltage analogue and is applicable to the control of machine tools. As shown, fingers 2a, 2b sense respective decimal digits coded in binary form on a tape 1. The unit 4 shown in block form is the same as unit 3 in which relays 11 ... 14 are energized in accordance with the coding on the tape to set switches 5 ... 8 correspondingly. A uniselector having banks A ... E is driven by electromagnet 22 and ratchet 25, interrupter contacts 26 being closed when coil 22 is deenergized and opened when the coil is energized. The banks A ... E are connected so that for any combination of states of switches 5 ... 8 the uniselector is stepped until its circuit is broken at one distinctive position, the position being different for each combination. The contacts E are connected to ten equispaced taps on an auto-transformer 27 which functions as a potentiometer and is energized by a fixed reference voltage, the voltage picked off by selector 20 being the analogue of the code group sensed by fingers 2a, and being supplied to output terminal 28 through the secondary winding of a transformer 29. The analogue of the code group sensed by fingers 2b is derived from selector 30 driven by unit 4 and applied to the primary winding of transformer 29, the transformer having a step-down ratio of 10 : 1, whereby the resultant voltage at terminal 28 is the analogue of a two digit decimal number. Specification 796,995 is referred to.
Patent GB-215488-A (GB)
Title: Improvements in carburettors for internal combustion engines
IPC: F02M19/02
Filed: 1923-02-16
Abstract: 215,488. Dexter, A. Feb. 16, 1923. Spray carburettors.-The air inlet 7 is of constricted conical form, the apex of the cone coinciding approximately with the outlet orifice 10 of the fuel nozzle 8, the axis of which is inclined to the axis of the air inlet at an angle of approximately 75‹. The casing 3 is connected to the induction pipe at 4. contains a throttle valve 15 and is provided at the inlet end with a removable plug 6 having the conical aperture 7. Fuel is supplied from the float chamber 1 through passages 14, 12.
Patent GB-369461-A (GB)
Title: Ozone generator
IPC: C01B13/11
Filed: 1931-05-11
Abstract: <PICT:0369461/III/1> The generation of ozone is interrupted at regular and adjustable time intervals by means of a thermal release device, such as a bi-metallic strip.  Another suitable device as shown in the Figure consists of a metal box 1 closed by a thin diaphragm 2 and containing a small quantity of readily vaporizable liquid such as ether.  The box is heated by a heating coil 3 in series with the ozone generator, and the pressure exerted by the ether vapour opens the switch 4 and stops the generation of ozone. On cooling the diaphragm 2 resumes its normal position and closes the switch 4.  The timing of the advice is adjusted by means of a spring 5 which controls the tension of the diaphragm 2.
Patent GB-144871-A (GB)
Title: Improved sand-blast apparatus
IPC: B24C3/06
Filed: 1919-06-02
Abstract: 144,871. Holling Sand-blast. - Relates to sand-blast apparatus with continuous blast and having a rotary table on which the workcarrier rings or circulars are mounted, and comprises a mounting for these, whereby they may be given a reciprocating movement in an horizontal plane to move them into and out of operative position, and means for holding down the articles to be treated on the carrier rings. Mounted centrally on, or forming part of a rotary platform b is a cylindrical body a having at its upper end horizontal guide bars a<2> supporting by means of rollers a<3> a carriage c having thereon two or more stationary carrier rings or circulars c<1> adapted to communicate with the interior of the cylindrical body by means of openings c<2>. The articles f to be treated are mounted on the carrier rings with an air and dust-tight joint, formed of a ring h of rubber and a ring h<1> of wood or metal, therebetween, and are held down by means of levers e pivoted to a head d<1> adjustable on a vertical pillar d mounted on the carriage. Each lever carries a spring buffer f<2> adapted to engage the article f and may be locked in position against the action of a spring e* by means of a spring controlled rod e<1> adapted to engage in the teeth of a quadrant d<2> and to be locked by means of a trigger e<2> and a spring-controlled hook e<3>. In operation, the article f is located, by longitudinal movement of the carriage on the guides, over the cylindrical member and is cleaned by sand from the nozzle g; the carriage is then moved to bring the other article over the nozzle, the first article being removed and replaced by another. As the carriage is moved, sand &c. is returned by way of perforations a<4> formed in an annular recess a<5> in the cylindrical body and opening into an annular space formed by a sleeve a<6> mounted centrally within the body. The underside of the carriage is fitted with a replaceable hard white iron plate j to guard the underside of the carriage as this moves over the nozzle. Inclined scoops a' are carried by the cylindrical body to catch any sand &c. falling from the articles, and communicate by means of holes a<3> with the interior of the body.
Patent GB-312157-A (GB)
Title: Improvements in and relating to the feed water supply systems of steam power plants
IPC: F22D1/32
Filed: 1929-05-07
Abstract: 312,157. Akt.-Ges. Brown, Boveri, et Cie. May 21, 1928, [Convention date]. Feedwater, supplying.-The feedwater normally supplied to a boiler 17 by a pump 6 through heaters 7, 8 is partly by-passed when the supply is above the normal through a pipe containing a valve 9, which opens automatically upon the loss of water pressure between the inlet and outlet of the heaters exceeding a certain value. Each heater may have a separate by-pass and automatic valve. The by-pass and the automatic valves may be arranged inside the heaters. Specification 2097/00 is referred to.
Patent GB-686648-A (GB)
Title: Improvements in or relating to electric circuit interrupters
IPC: H01H33/55
Filed: 1951-06-15
Abstract: 686,648. High tension switches; actuation of switches. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. June 15, 1951 [July 15, 1950], No. 14185/51. Class 38 (v) [Also in Groups XXIV and XXIX] A switch has a tank of such a shape as to provide adequate electrical clearances between the tank walls and the live parts of the switch with a minimum volume of oil or other fluid in the tank. The tank 4 is of generally circular side elevational shape and has an oval cross-section, i.e. its shape is that of an oblate spheroid. It is formed by welding together at 11, two circular dished heads 9, 10 of semi-elliptical cross-section. An upstanding oval tubular member 12 is welded to a cut-out portion 13 of the top of the tank. Bushing insulators 2, 3 extend through a cover member 17 secured on the member 12, the lower ends of the insulators carrying arc-extinguishing units 6 with which a bridging contact-member 7 co-operates. The live parts of the interrupting units 6 are at substantially the same distance S from the walls of the tank, this distance being the minimum distance necessary to prevent "flash-over". The bushing insulators have a length X which is greater than twice the radius R of the circular section of the tank. The switch is actuated by a lift rod 8 through linkage 5 housed between the bushing insulators 2, 3. To open the switch, a rod 19, Fig. 2 is pulled to turn an operating shaft 23, Fig. 6 in a clockwise direction The shaft 23 turns a toggle link 25 to break a toggle 25, 27, which forces a link 34 diagonally downwards to rotate a lever 36 about a fixed pivot 37. This causes the counterclockwise rotation of a triangularlyshaped plate 39 which is pivoted at 41 on a link 42 having a fixed pivot 43. The plate 39 moves the rod 8 downwards in guides (not shown) to open the switch contacts. Specification 621,452, is referred to.
Patent GB-116997-A (GB)
Title: Improvements in Loom Shuttle Clips.
Inventor: MILNER HENRY
IPC: D03J5/08
Filed: 1917-10-03
Abstract: 116,997. Milner, H., and Firth, S. Oct. 3, 1917. Shuttles.-In clips B of the kind having springs interposed between their side wings and the shuttle body, the bottom ribs A of the clip are made of double thickness by bending the material of the clip upon itself or by attaching small side plates, the doubled parts being bored to receive the attachment pins F. According to the Provisional Specification, the notches in the side wings forming the upper parts of the clip are made wider than usual to permit of the insertion of a tool for manipulating the springs.
Patent GB-1455415-A (GB)
Title: Insulated pipe system having means for detection of moisture in the insulation thereof
IPC: G01M3/18
Filed: 1973-03-26
Abstract: 1455415 Measuring moisture content electrically E RASMUSSEN AS 21 March 1974 [26 March 1973] 14316/73 Heading GIN The moisture content of heat insulating material 6, Fig. 1 surrounding an iron pipe 4 is determined by the value of the D.C. resistance between the pipe and a conductor 12 located in the material 6. The insulation resistance connected in parallel with a capacitor 14 is fed with A.C. from an oscillator 18 and the phase angle between the current taken and the applied voltage is measured at 20. The presence of moisture in material 6 decreases the phase angle and at a pre-set value a switch 22 is operated to open-circuit a tone generator 24 whose de-energization is noted at a central station 32. A plurality of pipe sections 2, each having its own tone frequency, are cyclically connected to the central station.
Patent GB-1429861-A (GB)
Title: Vincamine derivatives
IPC: C07D209/16
Filed: 1973-03-26
Abstract: 1429861 Vincamine derivatives SANDOZ Ltd 26 March 1973 [29 March 1972 20 April 1972 17 May 1972 2 Feb 1973] 14442/73 Heading C2C The invention comprises compounds of Formula (VI) in which R is a C 1 -C 4  alkyl group in the form of their various stereoisomers and nacenates they may be made by catalytically reducing a salt having a cation of Formula (V) which may be made by subjecting a compound of Formula (IV) to a Bischler-Napieralski ring closure. The compound of Formula (IV) above may be obtained by reacting a compound of Formula II in the presence of a basic condensation agent with compound of Formula (III) in which R and R<SP>1</SP> are C 1 -C 4  alkyl. The product of Formula (VI) may be converted to vincamine or apovincamine by subjecting it to ring closure in the presence of an acid.
Patent GB-611902-A (GB)
Title: Improvements in combustion units primarily for domestic use
IPC: F24B1/191
Filed: 1946-05-13
Abstract: 611,902. Fuel economizers. FITCH, C. E. H., and WILLIAMS, J. C. May 13, 1946. No. 14444. [Class 126] A combustion unit, for incorporation in a domestic fire grate, comprises a hollow body 1 connected with an auxiliary chimney 6 for introduction into the normal chimney. The hollow body 1 around which fuel is heaped, comprises a two-part metal casting connected by screws 3 and stiffened by rims 4, 5, slots 9 being provided in the front wall. The draught through the fuel may be controlled by a damper 7 in the chimney 6.
Patent GB-1080413-A (GB)
Title: Improvements in and relating to buoyant fenders
Inventor: PAVRY RICHARD
IPC: E02B3/26
Filed: 1965-04-06
Abstract: 1,080,413. Fenders. J. A. POSFORD, R. PALTRY, J. F. C. SWANSBOURNE, and P. W. ROWLEY. April 6, 1965, No. 14466/65. Addition to 990,599. Heading B7S. A buoyant fender comprises forward and rear buoyant tubes connected by a triangulated framework which extends above the water level and provides an axis of articulation of the fender that abuts against and rides along the piling which locates the fender, whereby the displacement of the fender consequent upon the forward tube being engaged by a vessel causes a rise in the centre of gravity of the fender. Adjustable abutments with the piling are provided on the fender framework for adjusting the static fore and aft position of the tubes relative to the piling.
Patent GB-673553-A (GB)
Title: Improvements in or relating to variable speed transmissions
IPC: F16H47/08
Filed: 1950-06-09
Abstract: 673,553. Hydromechanical variable-speed gear. WINDFIELDS (1946), Ltd. June 9, 1950 [June 23, 1949], No. 14491/50. Class 80 (ii). A fluid torque-converter of the kind (e.g. as described in Specification 548,044) wherein the forwardly-releasable reactor 10 is so designed as to become an efficient fluid-coupling runner after torque-conversion ceases; drives an output shaft 13, carrying, a sun 17, through a sun 15, fast to its turbine 6 and stepped planets 28 on a carrier 18, secured to its reactor 10, prevented from reverse rotation by a one-way detent 24 and connected with its impeller 5 on the input shaft 1 by a centrifugal expanding-shoe friction clutch 31, the carrier 18 being rotated by the reactor of the converter when the latter acts as a coupling so as to cause engagement of the clutch 31, which eventually provides a splittorque one-to-one drive through a mechanical path including the impeller 5, centrifugal clutch 31, planets 28 and output sun 17, together with a fluid path through the converter (now acting as a coupling), including the turbine 6, its sun 15 and planets 28. The clutch comprises centrifugal shoes 31 pivoted at one end on pins 30 on the carrier 18, and connected at their other ends by cranked links 36, Fig. 3, to a drum 34 which is urged circumferentially relative to the carrier 18, in a direction to oppose the centrifugal force on the clutch shoes, by coil springs 35 compressed in registering tangential slots in the carrier 18 and drum 34. The centrifugal clutch 31 can be disabled at any time for enforcing a downshift by applying a brake-band 37 manually to the drum 34. Drive passes from the output shaft 13 to the final driven shaft R3 through a bevel reversegear in which a freely-mounted planet-carrier R7 is clutched at R11 to the fixed casing for reverse, or to an input bevel at R10 for solid forward drive, by axial movement of a selectorsleeve R18, which tilts a pair of dogs R17, each rockable radially in a slot R21 in the carrier R7, to engage either of the clutch-teeth R10, R11, engagement being facilitated by applying an anti-drag brake R16 to the input shaft 13 of the reverse gear.
Patent GB-670551-A (GB)
Title: Improvements in or relating to a fixed frequency difference stabilization system forultra high frequency oscillators
IPC: H03L7/04
Filed: 1941-11-12
Abstract: 670,551. Automatic frequency control systems. LELAND STANFORD JUNIOR UNIVERSITY, BOARD OF TRUSTEES OF. Nov. 12, 1941 [Nov. 20, 1940], No. 14591/41. Class 38 (iv). [Also in Group XL (c)] A plurality of ultra-high-frequency oscillators are stabilized with fixed difference frequencies, the oscillators having electron beam excited electron grouping and energy interchanging resonators, by varying the frequency of at least one of the oscillators by means including a mixer-detector having resonators connected, respectively, to the oscillators to produce sum and difference frequency voltages which are compared with voltage from a master oscillator to produce the frequency-controlling voltages. Fig. 1 shows fixed and variable frequency oscillators of the type disclosed in Specification 523,712 which are coupled to a detector mixer 16 which feeds audio amplifier 24 and limiter 26. As shown, the output is combined with that from a limiter 32 associated with master oscillator 31 in transformers 28, 30, so wound that with the voltages in phase quadrature the rectified voltage across resistance 39 balances that across resistance 43. The sum of the voltages across these resistances is a measure of the error and is used through an amplifier 13 to drive a correcting motor 12 and to control the bias and so the impedance of a valve 9 and thus the accelerating voltage and frequency of oscillator 2. In a modification, Fig. 3, combination of the outputs of limiters 26, 32 is effected in double grid amplifiers 50, 51, the phase reversing valve 48 providing the necessary phase reversal for one of the amplifiers. The system is particularly adapted for wave-guide communication for maintaining separate frequency channels at a desired fixed difference. An additional. buffer resonator 8, as described in Specification 670,571, may be associated with the oscillator 1, Fig. 1, to provide the external coupling to prevent one oscillator from influencing the frequency of the other.
Patent GB-669510-A (GB)
Title: Improvements relating to composite metallic articles
IPC: B32B15/01
Filed: 1950-06-13
Abstract: 669,510. Making composite sheets. GENERAL MOTORS CORPORATION. June 13, 1950 [June 21, 1949], No. 14677/50. Addition to 628,198. Drawings to Specification. Classes 83 (ii) and 83 (iv). Welding; rolling at specifled temperatures.- The method of the main invention of making composite metallic articles is modified by heating the members to temperatures of 700‹ F. to 910‹ F. with thickness reductions of 85-30 per cent respectively and pressing the members together in a non-heated non- oxidizing atmosphere by heated rollers. The plating may be of silver, tin, nickel or brass instead of copper.
Patent GB-571705-A (GB)
Title: Improvements in or connected with straps for wristlet watches and the like
IPC: A44C5/16
Filed: 1943-09-08
Abstract: 571,705. Hand-bag handles. WRONKER, J. C. Sept. 8, 1943, No. 14715. [Class 133] [Also in Group VII] A flexible metal reinforcing insert 1, Figs. 1, 2, for the looped connection of a wristlet strap to a. watch loop 3 is inserted between main and lining strap parts 4, 5, with one or more tongues on the insert 1 projecting through transverse slits 7 in the lining strap. The tongues 2, after being passed through longitudinal slits 8 in the lining strap, or through both the lining and main straps after the strap end and insert 1 have been passed through the watch loop and turned back, are bent down into the strap. Where the tongues 2 pass through the lining 4 only, the main strap part is stuck down to the lining strap to conceal the tongues. The invention may also be applied to the attachment of hand-bag handles.
Patent GB-902196-A (GB)
Title: Aircraft load balance computer
IPC: G06G7/70
Filed: 1961-06-28
Abstract: 902,196. Recording-apparatus. ELFENBEIN, J. A. May 8, 1958, No. 14770/58. Class 106 (4). [Also in Group XXXVI] In analogue calculating apparatus for determining the centre of gravity of an aircraft (see Group XXXVI), the control panel 25 (Fig. 11) is mounted on carrier guide bars 26 carried by a back panel 27. A platform 28 slides on the guide bars against compression springs 51 and carries a pack of carbon interleaved manifold sheets 30 held on locating pins extending through apertures thereof, while the operating spindles of variable resistors representing movements, weights, and the C.G. position are extended to carry flexible arms 35 with collars at their outer ends through which are threaded pointed styli 38 engaging the surface of the pack when the platform 38 is raised by a pair of eccentrics 40 bearing on its underside, which are ganged together by connecting rod 45 for operation by handle 44. On rotation of the latter at bridge balance, the pressure of the respective styli against the pack of record sheets produces marks on pre-printed circular scales (Fig. 12, not shown), recording the respective values.