baber/WOPTO huggingface dataset:
Patent GB-837110-A (GB)
Title: Process of extracting and recovering columbium and tantalum from their ores and products thereof
IPC: C22B34/24
Filed: 1956-12-20
Abstract: Niobium and tantalum values are extracted and separately recovered from their ores, such as columbite or tantalite, which are preferably first ground and roasted between 600 DEG  and 800 DEG  C. to oxidize the iron and manganese, by digesting with an ammonium fluoride solution to yield complex ammonium-metal fluorides.  The solution thus obtained may be freed from minor impurities by adding a soluble sodium salt, preferably the carbonate.  The tantalum may be recovered from the solution as potassium fluotantalate by treating with a soluble potassium salt, preferably the fluoride, followed by cooling to 10 DEG  C. to crystallize the potassium fluotantalate.  The remainder of the tantalum may now be recovered by adding ammonia until the pH of the solution is 6.0 to 6.5, and warming the resulting slurry to about 90 DEG  C. to redissolve the niobium.  The tantalum is recovered as the hydrous oxide.  By adding a large excess of ammonia to the solution niobium hydrate is precipitated and recovered.  By dissolving this precipitate in a concentrated mineral acid other than hydrofluoric acid and boiling, an exceptionally pure niobium oxide is precipitated.  The potassium fluotantalate may also be hydrolysed using ammonia to give tantalum oxide.  The insoluble residue from the digestion with ammonium fluoride consists mainly of ferric and manganic ammonium fluorides.  Ammonium fluoride can be recovered from these by slurrying with excess ammonia in the presence of a small quantity of an oxidizing agent such as hydrogen peroxide. Iron and manganese hydrous oxides are also obtained.
Patent GB-1242392-A (GB)
Title: Improvements in or relating to guards and safety devices for cooking stoves and like apparatus
Inventor: SEGAL JACK
IPC: F24C15/36
Filed: 1967-08-23
Abstract: 1,242,392. Guards for cooker tops. J. SEGAL. 20 Nov., 1968 [23 Aug., 1967], No. 38830/67. Heading F4W. A guard for a cooker top comprises a metal fence surrounding the back, sides and front of the cooker, and formed of four corner pieces connected by bolts passing through slots 20 and holes 18 so that the fence may be adjusted to the size of the cooker top. Lugs 16 secure the fence to the cooker. The pieces forming the back wall have cut outs to accommodate a forwardly directed vent in the splash back, and holes 14 for the attachment of the lugs 16 are formed at the top and bottom so that the pieces may be reversed to accommodate vents at different heights. The fence may be secured to the splash plate by resilient straps.
Patent GB-1179541-A (GB)
Title: Gear Shift Mechanism
Inventor: THOMAS DALTON ADMIRAL
IPC: F16H59/04
Filed: 1968-08-14
Abstract: 1,179,541. Change-speed control. D. A. THOMAS. 14 Aug., 1968 [21 Aug., 1967], No. 38881/68. Heading F2D. Manual gear shift mechanism for changing ratio by straight forward and backward movements of a gear lever comprises a manual gear lever 34 pivoted at 35 and engaging an opening 36 in a member 22 which has apertures 21, 23 at its ends receiving vertical extensions of actuating members 13, 14 which shift the gears. The actuating members 13, 14 are alternatively lockable in their neutral positions so that forward or backward movement of the gear lever 34 pivots the member 22 about the extension of the locked actuating member 13 or 14 and shifts the other actuating member to a gear establishing position. The actuating member 14 is locked by its vertical extension 19 engaging an aperture 38 of a housing wall 29, the extension being raised out of the aperture to release the actuating member 14 by a plunger 48 on a lever 41 which is pivoted to the wall 29 and raised against spring bias by raising an operating member 44 which is slidably mounted on the gear lever and connected to the lever 41 by a cable 43. The actuating member 13 is locked by a lever 53 engaging a notch 54 provided in the actuating member, the lever 53 being pivoted at an intermediate point to a bracket depending from the housing and having its other end co-operating with the actuating member 14 so that when the actuating member 14 is locked the lever 53 disengages the notch 54 to release the actuating member 13, but when the actuating member 14 is raised to release it the lever 53 engages the notch and locks the member 13 in its neutral position. For a four speed gear, first gear is obtained by raising the operating member 44 to release the actuating member 14 and then pivoting the gear lever 34 forwardly so that the actuating member 14 moves rearwardly (to the right in Fig. 3) its extension 19 riding on a plate 49 secured to the wall 29. For second gear the lever 34 is shifted rearwardly and the actuating member 14 is thus moved forwardly to its second gear position. For third gear the lever 34 is shifted forwardly, at the midpoint of its movement the extension 19 strikes the edge of the plate 49 and drops into the aperture 38 so that the lever 53 is pivoted and releases the actuator member 13, whereafter further movement of the gear lever pivots the member 22 about the extension 19 and the actuating member 13 is shifted rearwardly to the third gear position. For fourth gear the gear lever is shifted rearwardly thus shifting the actuating member 13 forwardly to the fourth gear position. Reverse is obtained with the aid of a second gear lever. The shift mechanism is also adapted for use with a three speed transmission wherein reverse is obtained in the position corresponding to first gear for the four speed transmission.
Patent GB-931638-A (GB)
Title: Improvements in or relating to the deposition of gold or gold alloys
Inventor: HARLOW EDGAR FREDERICK
IPC: C25D3/48
Filed: 1961-11-02
Abstract: Gold, or gold alloy, is deposited by immersion or by electrolysis (see Group XXXVI) from a composition consisting of a tri-polyphosphate together with a gold salt, or with a gold salt plus the soluble salt of another metal, respectively.  The composition, formulated as aqueous solution ready for use, as concentrate for dilution or as dry mixture for dissolution, can provide for the immersion coating of dissimilar metal surfaces from a common solution.  Any suitable soluble gold salt may be used, e.g. gold cyanide, gold chloride.  The pH of the solution is controlled by the addition of alkali, e.g. KOH, NH4OH or strong acid, e.g. HCl, H3PO4, H2SO4. Buffering compounds are included to maintain constant pH values and may consist of a suitable weak acid, e.g. citric, lactic, tartaric, boric or acetic acids or soluble salts thereof.  As examples copper surfaces can be gold-plated at pH7-9, silver surfaces at pH 1-4.  It is stated that Ni, Mo, Ti brass and gilding metal may likewise be gold-plated.  Gold may also be deposited on non-conductors, e.g. plastics, glass and ceramic, provided such bases have a suitable catalytic surface formed thereon.  Gold can also be provided in the solution by using gold anodes with a suitable cathode, e.g. stainless steel, Pt or Cu and electrolysing the solution until sufficient gold is formed therein.  For the immersion coating or electro-deposition of gold, the solution temperatures range from 20 DEG  C. to boiling point. Gold alloys can be formed from nickel, copper, cobalt, silver, indium, antimony and gallium which metals are added in the form of soluble salts.
Patent GB-1397955-A (GB)
Title: Reinforced plastics
IPC: F41H5/04
Filed: 1972-08-24
Abstract: 1397955 Laminates FULMER RESEARCH INSTITUTE Ltd 17 Oct 1973 [24 Aug 1972] 39360/72 Heading B5N [Also in Division C3] A reinforced plastics article comprises a plastics material having a reinforcing material embedded therein, the reinforcing material having a firmly adherent complete or partial outer coating comprising a metal, an alloy of two or more metals, silicon, boron and/or a ceramic material, which coating has been formed by flame or plasma spraying and is firmly adherent to the matrix. Suitable coating materials are aluminium, zinc, magnesium, alumina, silicon carbide and boron carbide. The reinforcing material may be fibrous, e.g. glass or carbon fibre and is preferably in the form of a mat, e.g. a glass fibre mat. The articles may be used as personal armour. The examples describe laminates made by conventional wet lay-up techniques from woven glass roving sheets sprayed on one face only with zinc or aluminium and a polyester resin.
Patent GB-1365382-A (GB)
Title: Electron optical system
IPC: H01J37/153
Filed: 1971-08-23
Abstract: 1365382 Electron beam systems PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 23 Aug 1971 [25 Aug 1970] 39405/71 Heading H1D An electron optical system for producing an image in the form of an electron distribution corresponding to an electron distribution across an input electron beam, includes at least two four-pole lenses and at least two six-pole lenses for reducing a second order distortion error. Preferably a third hexapole is included. The system allows an observation screen to be tilted and viewed at right angles to the face for example, the distortion error produced by the tilted screen being corrected by the lenses. Particular orders of the lenses with corresponding corrections and magnifications are discussed. The double focusing deflection systems 10, 11 may respond to voltage fluctuations and produce corresponding deflection errors which may be compensated by switchable predeflection. The folded beam electron microscope shown includes condenser 2, preparation holder 3, objective 4, stigmator 5, diffraction lens 6, intermediate lens 7, switching magnet 8, deflection magnets 10, 11, four-pole lenses 12, 13, six-pole lenses 14, 15, combinations of four- and six-pole lenses 16, 161 and 17, 17<SP>1</SP>, six-pole lenses 18, 19, camera 20 and screen 21. Four-pole lens 22, phosphor screen 23 and optical device 24 are also included for centring components 4, 6 and 7. Screen 23 may be viewed by an image intensifier and TV camera for low outputs. The position and field strength of system 8 compensate for beam displacements in the Y direction produced by dispersion in systems 10 and 11 due to beam energy fluctuations. Second order errors due to systems 10, 11 and/or screen 21 and/or camera 20 can be corrected by the four- and six-pole combinations. A gauze in holder 3, produces an image as in Fig. 2a (not shown), at A-A<SP>1</SP> and distorted as in Fig. 2b (not shown) at screen 21 when the correcting lenses are non-energized. Energization of lenses 13, 17 produces X-Y magnification (Fig. 2c), a 45-degree rotation of screen 21 the Fig. 2d image, a reduction of lenses 13, 17 to a magnification at the centre equal to that of Fig. 20 produces the Fig. 2e image, Fig. 2f illustrates second order magnification error correction by lens 17<SP>1</SP> situated where y direction dispersion is greatest, Fig. 2g the curvature correction by six-pole lens 19 where the y dispersion is zero, Fig. 2h illustrating the correction by six-pole lenses 15. One particular angle of rotation of screen 21 obviates the need for six-pole lens 15. Stigmator 5 or the double focusing deflection system may have a quadrapole effect to render the system stigmatic.
Patent GB-905111-A (GB)
Title: Improvements in load weighing devices for lorries and such like
IPC: G01G19/10
Filed: 1958-12-08
Abstract: 905,111. Weighing vehicle loads. BERGENHEIM, K. H. T., BERGENHEIM, P. I. T., and ANDERSSON, A. H. Dec. 8, 1958, No. 39439/58. Class 143. A load weighing system for lorries and like vehicles comprises a plurality of the hydraulic weighing devices shown, each of which is placed between a wheel axle and the load carrying platform of the vehicle and is connected by a feed pipe from a pump to the aperture in its base and by a return pipe to the pump from the outlet 8, the feed pipe of each device incorporating a flow restriction such as a choking plate to prevent equalization of pressure throughout the system and the return pipe of each device actuating a load indicator which, together with other of the individual load indicators, may be coupled to a total load indicator. The indicators are set to read zero with the pressure in the cylinder 6 of each device just sufficient to raise its piston 9 clear of the outlet 8 with the piston stem 10 contacting but not supporting the unloaded vehicle platform whose weight is wholly carried by the vehicle springs, this condition being achieved by use of the adjusting nut 11. Normally, the hydraulic devices are relieved of pressure by use of a by-pass (not shown) opened by a valve which may be automatically held open whenever the vehicle is in gear. To weigh the load the by-pass valve is closed, the pump operated and the pistons stems 10 raised to take the net weight of the load.
Patent GB-1404756-A (GB)
Title: Model kidney nephron
IPC: G09B23/28
Filed: 1971-08-24
Abstract: 1404756 Model kidney nephron D KERR 24 Nov 1972 [24 Aug 1971] 39567/71 Heading G5G A model kidney nephron comprises three containers respectively representing a glomerulus capsule 1, a Bowman's capusle 2, and an abs crption capsule 3 in communication with one another in series, the connection between the capsules 1, 2 being by way of at least one restricted orifice 1A and the capsule 3 being surrounded by a jacket 4, the capsules 1, 2 being filled with permeable material 5, 6, a fluid reservoir 11 connected by a tube 12 to the capsule 1 via a pump 13, a tube 15 connecting the capsule 1 to the jacket, a tube 16 connecting the jacket to the reservoir, and a discharge tube 17 leading from the capsule 3. The circulation system formed thereby is filled with a dilute acid coloured with methyl red to simulate blood, whilst the capsule 3 is packed with a mixture of sodium carbonate and sand whereby the fluid seeping through the orifice and into the capsule 3 is neutralized and emerges as a yellow fluid from the tube 17. The materials 5, 6 may be differently coloured foamed plastics. In a further embodiment, the pump is a pristaltic pump.
Patent GB-1211483-A (GB)
Title: Aqueous colloidal silica sols and method of preparing the same
IPC: C01B33/148
Filed: 1968-08-21
Abstract: 1,211,483. Aqueous silica sols. NALCO CHEMICAL CO. 21 Aug., 1968 [30 Aug., 1967; 12 June, 1968], No. 40069/68. Heading C1A. An aqueous silica sol contains 10-25% by weight of particles of silica of average diameter 2 to 5 millimicrons, has a SiO 2 /Na 2 O ratio by weight of greater than 15 and has a pH of 9-11. The sol may be prepared by treating an acidic silica sol, containing at least 5% SiO 2  and having a particle size less than 5 millimicrons, with a water soluble sodium base, e.g. hydroxide, carbonate, bicarbonate or silicate, to give a SiO 2 /Na 2 O ratio of at least 7À5 thus providing an alkaline sol, and evaporating at below 150‹ F., if desired at constant volume by adding either alkaline or acid sol continuously. The starting sols are preferably prepared by passing sodium silicate through ion exchange columns according to known methods (U.S.A. Specification 2,244,325, Canadian Specification 623,562 referred to), and preferably have a particle size of 1-2 millimicrons. The evaporation may be carried out under vacuum. The product sols have a conductivity greater than 3000 microohms and a storage stability of over 6 months.
Patent GB-913224-A (GB)
Title: A magazine screw-driver which is driven by an electric motor
IPC: B25B23/06
Filed: 1959-11-27
Abstract: 913,224. Screwing-up and unscrewing screws. ALLGEMEINEN ELEKTRICITATS - GESELLSCHAFT. Nov. 27, 1959 [Dec. 2, 1958], No. 40440/59. Class 83 (3). An electrically-driven manually fed screwdriver comprises a screw-container 15, a spiral conveyer 16 secured to the container and vibrated by magnetic coils 14, which supplies the screws 8 to a track 5 and thence to the tip of the screw-driver 7. The screw-driver is rotated by an electric motor in the. handle 1, through reduction gearing 23, and a clutch 4, and the first screw is held in a guide-tube 9 by a spring-urged ball 10 until engaged by the screwdriver.
Patent GB-1517856-A (GB)
Title: Continuous production of return envelopes
IPC: B31B27/00
Filed: 1976-09-29
Abstract: 1517856 Making envelopes D J STEIDINGER 29 Sept 1976 40471/76 Heading B5D A method of making envelopes, e.g. 11, comprises applying longitudinal and transverse bands of adhesive (28, 29), Figs. 1 and 3 (not shown), 24 and 27 to a web W which is advanced by means of holes (16, 17), Fig. 1 (not shown) in one or both of its longitudinal margins (14, 15), Fig. 1 (not shown) and which provides envelope front and flap parts 22, 26, securing separate envelope back panels, e.g. 35, 36, to said web by means of the adhesive bands 27, (28 and 29), and severing transverse strips, e.g. 20, 21 from at least said web to separate individual envelopes. The transverse severing may also remove portion 35b of the back panels. The or each longitudinal margin including feed holes (16, 17) can be removed along a line of perforations. A fold line 25 may be scored in the web W between each front and flap part.
Patent GB-1522175-A (GB)
Title: Optical node correcting circuit
IPC: H04N5/272
Filed: 1975-10-03
Abstract: 1522175 Synchronizing two cameras MAGICAM Inc 3 Oct 1975 [3 Oct 1974] 40648/75 Heading G3N A composite photography system, e.g. TV or cinematography uses a first camera 40 which photographs an actor 36 or live action against a neutral background and a second camera 60 which photographs a desired background, e.g. a miniature set 62, the two camera outputs being superimposed to produce a final picture (so called registered matte photography). A control system synchronizes movement of both cameras so that there is compensation for nodal point displacement and thus satisfactory perspective registration during pan and tilt. The first camera 40 is mounted on a movable dolly 42 and controlled by cameraman 50, its video output being passed via line 52 to video control 54. Data giving camera pan, tilt, horizontal motion and vertical motion is passed via line 55, control 56, and line 57 to electronic servo control 58. The background camera 60 views miniature set 62 through periscope 64 (described in detail), Fig. 2 (not shown), having mirror or prism 65, and is moved in x, y directions by dolly frame 78. The camera video output passes via line 53 to video control 54, whose output can pass to monitor 54a or videotape recorder 54b. Servo control 58 passes signals via line 59 to control camera 60 movement in x, y, z planes, pan and tilt. The derivation of the compensation signals is described in great detail, Figs. 3-7 (not shown), using circuit for pivotal to nodal point, pan, tilt and xyz plane displacements, Figs. 8-11 (not shown).
Patent GB-1318426-A (GB)
Title: Reamer having a cutter with a plurality of cutting edges
IPC: B23D77/04
Filed: 1970-08-24
Abstract: 1318426 Reamers MAPAL DR KRESS KG 24 Aug 1970 [23 Aug 1969] 40688/70 Heading B3C A reamer comprises a head 1, a cutter 2 of substantially circular cross-section having at least two cutting edges 21, 22, at each end, adjustably located in a bore 12 in the head, the cutter being clamped in the adjusted position by a screw 5. A sleeve 3 has an inclined face 32 which engages the cutter, so that when a set screw 4 is screwed into the sleeve the cutter is adjusted along bore 12. Two guide ribs 6 are located in bores 17 and are prevented from rotation in the bores by a pin 7. Limited longitudinal movement of the ribs 6 in their bores 17 is possible since balls 8 are spring-urged into recesses 62 in the ribs. The angle of the axis of bore 12 with that of head 1 is between 0 degrees and approximately 2 degrees, less than the angle formed by the secondary cutting edge 21 with the axis of the cutter, the main cutting edges 22 form an angle of approximately 75 degrees with the longitudinal axis of the cutter. Four clamping grooves 24 are provided in the cutter.
Patent GB-1353042-A (GB)
Title: Hysteresis motors
IPC: H02P7/00
Filed: 1971-09-01
Abstract: 1353042 Control of A.C. motors HONEYWELL Inc 1 Sept 1971 [25 Sept 1970] 40716/71 Heading H2J [Also in Division G3] The rotor of a hysteresis motor is maintained in a permanently magnetized state by a system including a current detector which causes an oscillator to increase the motor current if the magnetization decreases. In the circuit shown, the current through motor windings 1, 2, which increases if demagnetization occurs, flows in a resistor 7 to develop a voltage which is rectified by a circuit 8 including an operational amplifier, Fig. 2 (not shown). In a level detector 9, the rectified voltage is compared with a reference in a differential amplifier to produce a positive or zero output for a gate 11 connected to an oscillator 12 including a uni-junction transistor, Fig. 3 (not shown). When triggered, the oscillator switches a selector 13 between a normal supply voltage 14 and a higher voltage 16, so that pulses of the higher voltage tend to increase the rotor magnetization. A capacitor smooths the transitions between voltage levels to prevent inductive surges. The supply circuit 15, Fig. 4, uses square wave sources to energize the windings 1, 2 in quadrature through push-pull amplifiers with an amplitude determined by the supply 14, 16 which is fed to a centre tap 64 of a transformer 87 connected to each of the motor windings 3, 5.
Patent GB-1439006-A (GB)
Title: Spreading device eg for fertilizer
IPC: A01C15/00
Filed: 1973-08-30
Abstract: 1439006 Spreading devices for fertilizer H VISSERS BV 30 Aug 1973 40777/73 Heading AID For balancing a device comprising a hopper 2 and a driving mechanism 3 adapted to angularly oscillate a distribution pipe 5 by means of a counterpoise 8 with respect to the axis 7 of rotation with an average filling of the hopper 2, the centre of gravity of the counterpoise 8 and the distribution pipe 5 is arranged to lie vertically below the centre of gravity of the assembly comprising the frame 1, hopper 2 and driving mechanism 3. The hopper may be symmetrical. In another embodiment, the counterpoise is adapted to be replaced, or to be adjusted to different distances from the axis 7 for specific materials contained in the hopper 2.
Patent GB-1274733-A (GB)
Title: Process for modifying glass and other articles
Inventor: PLUMAT EMILE
IPC: C03C21/00
Filed: 1969-08-15
Abstract: 1,274,733. Modifying glass. GLAVERBEL. 15 Aug., 1969, No. 40892/69. Heading C1M. At least one property of a body of glass, vitrocrystalline material or ceramic is modified by contacting the body with a material containing or consisting of a molten nitrate salt, at least in part while the material is in contact with CO 2  gas in a quantity sufficient to promote ion diffusion from the salt to the body. The treatment may form part of an ion-exchange treatment, e.g. exchange of alkali-metal ions. The CO 2 , which may be mixed with N 2  or air, may be bubbled through a bath of molten nitrate or streamed against the glass with streams of molten nitrate. The CO 2  is preferably used in an amount of at least 0À1 litre/min./m.<SP>3</SP> of salt. The ion diffusion may be enhanced by an electric field. Specification 1,274,732 is referred to.
Patent GB-1410334-A (GB)
Title: Beverage brewing apparatus
IPC: A47J31/02
Filed: 1972-09-06
Abstract: 1410334 Food preparations DOUWE EGBERTS KONINKLIJKE TABAKSFABRIEKKOFFIEBRANDERIJEN - THEEHANDEL NV 6 Sept 1972 [7 Sept 1971] 41257/72 Heading A2B [Also in Division A4] A tablet 1 for use in preparing a beverage in a brewing unit as shown (see Division A4), comprises compressed beverage solids e.g. coffee, tea, cocoa. The tablet may further comprise additives such as sugar or milkpowder.