baber/WOPTO huggingface dataset:
Patent GB-841989-A (GB)
Title: Improvements in and relating to methods of extracting lithium from petalite, products of those methods and applications of those products
IPC: C22B26/12
Filed: 1955-06-03
Abstract: Lithium is extracted from petalite by calcining the ore at 600 to 1350 DEG C. grinding, and treating with sulphuric acid at 150 to 400 DEG C. and thereafter extracting the reaction mixture with an aqueous liquid which dissolves the lithium sulphate formed.  The sulphuric acid employed has a strength greater than 50% and may be oleum; calculated as 100% acid it constitutes 10% to 50% by weight of the ore.  The reaction product may be extracted with water or solutions of hydroxides, carbonates, bicarbonates, borates, silicates and aluminates of alkali or alkaline earth metals or ammonium, the pH not being raised above 7; aqueous solutions of organic solvents such as methyl or ethyl alcohol or acetone may also be used.  In all cases, the lithium sulphate is extracted unchanged, and the extract solution may be treated to precipitate lithium as carbonate.  The insoluble residue from the extraction is an alumina/silica complex substantially free from metals having coloured oxides: it is hence suitable as an ingredient of glasses or ceramics and the preparation of ceramic slips. According to an example, petalite was roasted at 1000 to 1200 DEG C., crushed to 120 B.S. sieve, then treated with strong sulphuric acid at 200 to 400 DEG C.  The cooled mixture was extracted with water and filtered.  The filtrate was treated with chalk or limestone at a pH of 6.0 to 6.5, filtered, treated with lime water at pH 12 to precipitate magnesium contaminant and then with soda ash to precipitate calcium carbonate.  After adjusting the pH to 7 with sulphuric acid to precipitate aluminium, which was filtered off, the lithium was precipitated as carbonate by means of sodium carbonate solution and separated in the hot at 90 to 100 DEG C.
Patent GB-379732-A (GB)
Title: Improvements in or relating to skiving machines
IPC: C14B1/00
Filed: 1931-06-04
Abstract: 379,732. Skiving- machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., WOODCOCK, R. B., and BOOTHROYD, H., Union Works, Belgrave Road, Leicester. June 4, 1931, No. 16142. [Class 31 (i).] Stationary-cutter machines; cylindricalcutter machines.- In a rotary knife skiving- machine means are provided whereby (a) the presser is moved heightwise or angularly by a single adjustment of a controlling means, and (b) the driving mechanisms for the knife, feed roll and grinding means are housed in a sleeve member 26 rotatably mounted in the machine frame and having fixed to it knife supporting means and grinding wheel supporting means. (a) The presser 66 is pivoted to a member 71 slidingly mounted in a swing-frame 67. Depression of a treadle through a wire 78 moves a crank pin 75 to shift the slide. Screws 80 threaded in the frame 67 limit the position of the frame. The presser has an arm 85 guided in the slide 71. The arm 85 has an arcuate rib 86 engaging a groove 87 in the slide 71 and is pivotally connected to a bar 90 on the slide 91. Screws 93, 94 limit the movement of the slide 91 under spring pressure. The screws 93, 94 engage cams 95, 96 on a shaft 97 engaging a rack 100 on the swing frame and operated by the wire 78 controlled by the treadle. When the treadle is raised the screw 93 engages the cam 95 to adjust the angular position of the presser. On depression of the treadle the cam 96 engages the screw 94 and controls the position of the presser. (b) The knife 23 is rotated from a shaft 6 through gearing 18 and the grinding discs 36, 37 are driven by gearing 38 through a hand operated clutch 45 and the feed roll 17 is driven by gearing 10. The gearing is mounted in the sleeve 26. A grinding-wheel carrier 34 is rotatably mounted on the sleeve 26. Secured to the end of the sleeve is an arm 24 carrying the knife shaft 20. The arm 24 carries a lever 50 spring held against a screw 51 threaded in the frame. An arm 54 on the grinding wheel carrier 34 is spring- pressed against a screw 56 threaded in a block 58 on the arm 50. When the knife-adjusting screw 51 is adjusted both the knife and grinding wheels are adjusted about the axis of the shaft 6. If the grinding wheel adjusting screw 56 is moved, the grinding wheel only is moved. Specifications 23850/11, [Class 92 (i), Ordnance &c. mountings], 216,221, and 318,309, [both in Class 31 (i), Cutting and severing machines &c.], are referred to.
Patent GB-1501154-A (GB)
Title: Detection or determination of heavy ions
IPC: G01T5/10
Filed: 1975-04-18
Abstract: 1501154 Ion detectors COMITATO NAZIONALE PER L'ENERGIA NUCLEARE 18 April 1975 [22 April 1974] 16237/75 Heading H1K [Also in Division H5] To count and estimate the energy spectrum of heavy ions, e.g. Cf<SP>252</SP> fission products, a capacitor with thin electrode 2 on thin dielectric 1 over a conducting or semi-conducting base 3 is fed with adjustable voltage 8 below breakdown level via a protective circuit 7; ions above a threshold energy cause local breakdown registered on a counter 9 and microscopically visible (Fig. 4, not shown) holes on the electrode 2. The lower the voltage the higher the energy threshold to breakdown the dielectric; a differentiated plot of count versus voltage (Fig. 3, not shown) provides the energy spectrum. The protective circuit 7 may be a resistor >10<SP>4</SP> ohm or quenching circuit; before putting into service the device is exposed to increasing voltage via protective circuit 7 to burn out defects in dielectric 1. The electrode 2 can accept a total of some 10<SP>6</SP> holes/cm.<SP>2</SP>; when at least 10% of this level has been recorded a correction factor for loss of area can be applied (Fig. 5, not shown), inversely proportional to the capacitance. The dielectric is thickened, 4, under the connection to the electrode, e.g. by extra SiO on an SiO 2  layer 1 formed on P<SP>+</SP> Si base 3, with a thin Al electrode 2, smaller in area than the base 3 and dielectric 1 (Fig. 1, not shown), also thickened 6 to take a pin or welded connection. The electrode 2 is made negative.
Patent GB-554132-A (GB)
Title: Improvements relating to the manufacture of asbestos-cement and like products
IPC: B28B1/52
Filed: 1941-12-16
Abstract: 554,132. Manufacture of asbestos-cement products. TURNER & NEWALL, Ltd., and TURNER, L. A. Dec. 16, 1941, No. 16254. [Class 96] An asbestos-cement or like slurry from a feed-trough 8 flows between a shoot 15 and a flexible gate 20 to a longitudiual wire cloth or woven fabric conveyer 1 which carries it past a gauge roller 29, over suction boxes between press rolls, over a' further suction box and e.g. to a mandrel upon which it is wound to form pipes &c. or to form sheets &c. The gate 20; shoot 15 and roller 29 are each shaken as by out-ofbalance armature mechanism and supported through shock absorbers 19 &c. and turn-buckles 56 &c. further, local, height adjustment for the gate 20 being provided at 59. The conveyer 1 passes over a transverse plate 25 mounted with shock absorbers 27 and shaken at 28, e.g. at 2,000 to 10,000 reciprocations per minute. The ratio of solids to water in the slurry is from 3 to 2, up to 3 to 20. The return run of the conveyer web 1 is cleaned by water sprays, a suction box, and a heater, and is sprayed at 40 adjacent the breast roll so that it is thoroughly wet before receiving slurry. The trough 8 is tilted at 12, 13, as disclosed in Specification 540,463, or the flow of slurry may be stopped by a hinged flap with a rubber pad contacting the overflow lip of a fixed trough. Specification 542,926 also is referred to.
Patent GB-596342-A (GB)
Title: Improvement in inductor tuning system
IPC: H01F21/06
Filed: 1945-06-26
Abstract: 596,342. Inductances. MANTLE LAMP CO. OF AMERICA. June 26, 1945, No. 16299. Convention date, Aug. 14, 1944. [Class 38 (ii)] An inductor comprising a magnetic core 7 movable in a coil 6, has such dimensions and properties that, when connected in a tuning circuit with a fixed condenser C, the logarithm of the resonance frequency is directly proportional to the distance through which the core is moved. It is shown that in such a circuit, in contradistinction to a circuit in which the frequency is directly proportional to the distance, a given frequency range may be covered by requal core movements with different tuning capacities, so that for making this range conform with a predetermined frequency band, the factory adjustment may be made by varying the relative position of the core and coil. It is also shown that for frequency bands having the same ratio of frequency coverage, identical core displacements are required. The required inductor which has a powdered or laminated ferro-magnetic core, may be made by winding the coil in a number of sections # 1 to # 6 of different pitch, Fig. 1, or of different diameter, Fig. 4; by making the hollow cylindrical core of parts # 1 to # 6 of different cross-section by varying the inner or outer diameters, Fig. 6 ; or by making a compressed powdered core of parts of different densities, Fig. 8, (not shown). The winding may have more than one layer. The Specification gives design data of an example of each kind of inductance with corresponding log-frequency-core distance curves. Fig. 10 shows an arrangement for simultaneously tuning two circuits in which two similar inductors comprise coils Aa, Db and moving cores Ba, Bb. The cores are supported from a cross arm F on a slide Fc by threaded rods Fa, Fb and the coils are carried by brackets Da, Db mounted for vertical adjustment by pinion tools on panel E. The slide Fc may be moved vertically by suitable mechanism to vary the inductances, and the consequent rotation of a pinion Fd is used to move a string which carries a pointer along a frequency scale. Three adjustable quantities are : the position of the pointer along the string, the position of the cores with reference to the cross arm, and the position of each coil relative to panel E. Specification 549,092 is referred to.
Patent GB-120950-A (GB)
Title: Improvements in Automatic Profiling Machine.
Inventor: GOLBY FREDERICK WILLIAM
IPC: B23D27/00
Filed: 1917-11-08
Abstract: 120,950. Golby, F. W., (Luster-Jordan Co.). Nov. 8, 1917. Punches and dies.-A shaping-machine for cutting out blanking and trimming dies, punches, &o., as described in Specification 3756/13, [Class 83 (iii), Metals, Cutting], has the mechanism for reciprocating the cutter and for moving the work improved. The tool 14, Figs. 1 and 2, is clamped by a nut 45, which can be loosened to allow the tool to be turned about its axis, to a rack 7. This rack is connected through direct and reversing trains of gearing 5<1>, 5<11>, Fig. 3, to clutches 2<1>, 3<1> alternately engaged by a clutch member 4 feathered to slide on the driving shaft 1. This movement is imparted to the clutch 4 by a rod 10, fork 12<1>, Fig. 1, shaft 9<11>, and lever 9, Fig. 2, which is engaged by adjustable stops 8 on the rack 7. A sliding table 15a is drawn towards the cutter by a weight and cord 15<b> and carries a table 15<d> pivoted at 15<e> and adjusted in inclination by a wedge and screw 16. Rotablymounted in the table 15d is a table 17', Fig. 6, carrying a slide 19 which in turn carries a slide 22. The slide 19 has two lugs 19" adapted to engage a fixed ring 19<1> which can be adjusted eccentrically on the table 15d to impart an elliptical movement to the slides 19, 22. The latter can be given also a diametral movement by means of a screw 32 rotated through a clutch 30, pinion 29, toothed annulus 21, pinion 28, ratchet gear 33, links 34, 25, Fig. 1, and slotted disk 23 on the oscillating shaft 5. The link 25 also operates a ratchet gear 26 which rotates a worm 17<11>, Fig. 6, to rotate the table 17<1>. The work 55 and templet 54, Figs. 1 and 2, are clamped, with distance pieces between them, to the slide 22. The table 15<a> is clamped, during each cut, by a lever 38 actuated by the rack 7 through a spring brake 36.
Patent GB-1283299-A (GB)
Title: Method and means for separating wet gluten or glutenin from flour intended for baking purposes, particularly flour produced from wheat
IPC: G01N33/10
Filed: 1970-04-07
Abstract: 1283299 Testing flour FALLING NUMBER AB 7 April 1970 [8 April 1969] 16404/70 Heading A2Q [Also in Division B1] Wet gluten or glutenin is separated from a sample of flour intended for baking purposes, in the testing of the flour to determine the quantity of wet glutenin in a given quantity of the flour and thus to gauge the protein content of the flour, by apparatus comprising a variable speed mixer for mixing and kneading the dough and having a stirrer arm 18 secured to a rotating shaft 13, a vessel 15 having a sieve element 17 in its base and in which the stirrer arm 18 operates, means for supplying water to the vessel to first mix with the flour to form the dough and then to wash away water-soluble constituents from the dough through the sieve element 17 during the kneading of the dough, and means for shutting off the sieve element. The shutting-off means consists of a slide 24 slidable in a holder 20 between a first position, in which a rubber seal 25 shuts off the sieve element, and a second position in which liquid is free to pass through the sieve. Springs 23 urge the seal 25 against the base of the vessel 15 when the seal is in the first position, in which position the flour is mixed to a dough with a suitable quantity of water supplied on top of a distributing disc 14, with the stirrer arm 18 rotating at a relatively high speed, e.g. 1000 rpm. After mixing is completed, preferably within 20-30 seconds, a lever 22 is operated manually to lower the holder 20, enabling the slide to be moved to its second position, and further water is supplied to the vessel 15 while rotation of the stirrer arm 18 is continued at a slower speed, e.g. 400 rpm, preferably for 2¢-5 minutes. The speed may then be further reduced, e.g. to 100-200 rpm, so that any dough remnants in the vessel 15 are collected together, after which the assembly consisting of shaft 13, disc 14 and stirrer arm 18 is lifted out from the vessel by manual operation of a lever 35 and the wet glutenin is removed and placed in a centrifuge 7 where it is spun prior to being weighed. The centrifuge rotor is mounted on the shaft 3a of a motor 3 which also drives the shaft 13 at the three different speeds by a slackenable driving belt 29, for the highest speed, or by a stepped capstan 28, 3a driving friction or gear wheels 32, 31, the motor 3 being raised by a lever 35 from the intermediate speed position shown to select the lowest speed via 3a, 32, 31.
Patent GB-274629-A (GB)
Title: Improvements in or relating to condensers
IPC: F28F19/00
Filed: 1926-06-30
Abstract: 274,629. Yorkshire Copper Works, Ltd., and Fraser, K. June 30, 1926. Nozzles on tubes for facilitating flow of fluid. - Con - denser tubes 2 are fitted at their ends with liners 1 of substantially uni - form thickness of metal terminating at their outer ends at or short of the outer extremity of the ferrule 5 and extending within the tube a distance beyond the inner surface of the tube plate 3. The outer ends of the liner may be flared to bed in a corresponding chamfer of the ferrule or may be flanged over the end of the tube 2 under the ferrule.
Patent GB-583974-A (GB)
Title: Improvements in or relating to self-locking equalizing drives
Filed: 1944-08-29
Abstract: 583,974. Differential gearing. CLEVELAND, F. J. (Akt.-Ges. der Eisen-und Stahlwerke vorm G. Fischer). Aug. 29, 1944, No. 16425. [Class 80 (ii)] In a self locking differential gear having, on at least one of the two half shafts, a clutch engagable by inertia when the speed of its associated half shaft abruptly changes such as, for example, when a vehicle wheel spins on soft ground the clutch is engaged by a member which moves axially under cam action. As shown, a nut 8 is carried by a screwed ring 5 splined to a half shaft 3 fixed to a bevel wheel 4 of the differential gear and is located in a housing 11 clutched at 13 to the planet carrier 1. The ring 5 and nut 8 are normally centralized by spring-urged pins 6, 10, and have conical friction faces 16, 14, engagable with corresponding faces on the housing 11. Sudden change of speed of the shaft 3 causes the nut 8, due to its inertia, to move axially and bring the friction faces into engagment. Plate friction discs may be used instead of conical friction faces. The nut may be in two parts arranged side-by-side and which co-operate either with a flange fixed to the middle of the ring 5 or with flanges at the ends thereof. In another modification members 29<1>, 30, Fig. 6, are loosely mounted on, and have ratchet tooth engagement with, a ring 28<1> fixed to a half shaft. The members 29', 30, are spring-urged towards the ring 28<1> and have friction faces engagable with corresponding faces on the casing 33 fixed to the planet carrier of the differential gear. The axial faces 32 of the teeth may be replaced by cam faces sloping in the opposite direction to the cam faces 31. In a further modification embodying two part nut members 7, Fig. 4, each screw member 5 is on a hollow shaft 3<1> connected to the vehicle half axle 15<1> by gearing 13<1>, 14', and the casings 9<1> are coupled to the differential planet carrier 12<1> by a shaft 11.
Patent GB-120605-A (GB)
Title: Improvements in or relating to Cooling Arrangements for Dynamo Electric Machinery.
IPC: H02K9/18
Filed: 1917-11-09
Abstract: 120,605. Lo-Thermo Patents, Ltd., Longbottom, B., and Greenhalgh, E. Nov. 9, 1917. Gills for tubes.-In apparatus for cooling enclosed dynamo-electric machines by circulating air through the casing of the machine and through a heat-exchanging device, as described in Specification 16640/15, the heat-exchanging device consists of two vertical portions, consisting of similar units and connected by a horizontal casing at the top, so that the heat-exchanging surface can be increased or diminished as required. To junction pieces B mounted on the dynamo casing are secured series of dished plates D, E, with central openings, fitted together as shown. The plates D have flanges on their outer edges, into which the plates E fit, and the plates E have flanges e<3> on their inner edges, into which the plates D fit. In a modification the plates D, E have interlocking flanges at both the inner and outer edge. The structure thus formed is held together by a vertical bolt H connecting the junction-piece B to the horizontal casing C at the top. On the bolt H are threaded baffle-plates J separated by ferrules h<1>.
Patent GB-883630-A (GB)
Title: An immersion temperature-sensing unit
Inventor: MEAD HAROLD GRAY
IPC: G01K7/02
Filed: 1958-02-03
Abstract: 883,630. Measuring temperature electrically. LEEDS & NORTHRUP CO. Feb. 3, 1958, No. 16464/61 - Divided out of 883,629. Drawings to Specification. Class 40 (1). The subject-matter of this Specification is substantially the same as that described in Specification 883,629 from which it has been divided but the claims relate to an immersion unit for sensing the temperature of molten metals comprising a heat insulating support body, and a tube of refractory insulating material both ends of which enter the body and an intermediate part of which houses the sensitive part of a temperature sensing element which passes through the tube and is joined at points within the body to two electrical conductors for connection to a measuring circuit. Specification 883,631 also is referred to.
Patent GB-978816-A (GB)
Title: Improvements in microscope objectives
IPC: G02B21/02
Filed: 1963-04-29
Abstract: 978,816. Microscope objectives. MEOPTA PRAHA NARODNI PODNIK. April 29,1963 [Dec. 19, 1962], No. 16751/63. Heading G2J. A variable focal length objective for a microscope comprises a fixed front positive lens, a negative lens and a second positive lens, the last two being independently movable along the optical axis of the system to vary the power while producing an image in a fixed plane. The focal lengths of the lens lie in the ranges 0.12a # 0. 2a, -0.06a # -0. 1a, and 0.12a # 0.2a respectively where a is the distance between the image and the object. Optical data given in the Specification.
Patent GB-327058-A (GB)
Title: Improvements in or relating to four-stroke internal combustion engines
IPC: F02B3/00
Filed: 1929-05-31
Abstract: 327,058. Heinzelmann, H. March 4, 1929, [Contention date]. Four - stroke - cycle engines; cylinders, ports of. -At the end of the expansion. stroke when the pressure within the cylinder has fallen due to the opening of the exhaust valve 7 or 10, scavenging air is admitted through terminal port, 13 or 14. On the induction stroke air is drawn in through the admission valve 5 or 8, the valve closing before the terminal ports 13 or 14 are uncovered; an additional air charge then enters and swirls within the cylinder, the passages to the terminal ports being arranged tangentially to the cylinder. Valves 16 or 17 prevent the passage of charge into the air supply pipe 15. Liquid fuel injection valves 6, 9 are arranged in the cylinder heads. The invention may be applied to single-acting engines.
Patent GB-1498428-A (GB)
Title: Dual system carbonless paper
IPC: B41M5/124
Filed: 1975-04-23
Abstract: 1498428 Pressure-sensitive recording sheet sets MOORE BUSINESS FORMS Inc 23 April 1975 [3 May 1974] 16841/75 Heading B6A [Also in Division B2] A pressure-sensitive recording sheet set 10 comprises a top sheet 12 having a back coating 14, a bottom sheet 16 having a front coating 18, and at least the intermediate sheet 20 having a front coating 26 and a back coating 28; each coating including a colour forming reactant, the reactant in each of the back coatings being capable of reacting with the reactant in the front coating in contact therewith on application of pressure to produce a coloured mark, the reactant in the back coating of each intermediate sheet not being capable of reacting with the reactant in the front coating of the same sheet to produce a coloured mark. The reactant in the front coating 18 of the bottom sheet may be capable of reacting with the reactant in the back coating of any of the other sheets to produce a coloured mark on application of pressure. In a typical example, coating 14 on top sheet 12 may comprise microcapsules containing crystal violet lactone. Coating 26 on sheet 20 may comprise a phenolic resin and coating 28 may comprise microcapsules containing a dithiooxamide. Coating 30 on sheet 22 may comprise nickel rosinate and coating 32 may be identical to coating 14. Sheet 24 may be identical to sheet 20. Coating 1.8 on sheet 16 may comprise a mixture of phenolic resin and nickel rosinate. Many other examples of colour-forming systems which may be used are given.
Patent GB-1457891-A (GB)
Title: Sealable electrical apparatus and switches therefor
IPC: H01H36/00
Filed: 1973-04-09
Abstract: 1457891 Magnetic switches UNDERGROUND LOCATION SERVICES Ltd 22 March 1974 [9 April 1973] 16929/73 Heading H1N A sealed magnetic reed contact unit 5 within a sealable housing 1, 2 containing electronic equipment is operable by a permanent magnet 7 on an angularly slidable ring 6 outside the housing 1, 2.
Patent GB-384213-A (GB)
Title: Improvements in radiators and in the manufacture thereof
IPC: B22D19/00
Filed: 1932-06-15
Abstract: 384,213. Casting composite articles. ANTINORI, A., Pesaro, Italy. June 15, 1932, No. 16946. Convention date, June 15, 1931. [Class 83 (i).] Moulds ; cores.-In casting radiator headers on to the tubes, the cast iron is arranged to cover the tube ends externally for a short length and internally for a greater length so as to remove impurities from and heat the ends to a high temperature. The ends of the tubes 1 are fitted with sand cores 5 which close it at 7, engage by ribs 6, and leave space 4 for molten metal. The tubes are then arranged in moulds 9, 10 with cores 8, having holes into which the ends of the cores 5 extend. The cores 8 are supported by rods 27 engaging the ends of plugs 20 screwed into boxes 18. Each plug 20 also carries a varnished screw-tap 14 to form a threaded hole in the header. The metal is poured at 17, the whole inverted about the pivot 25 of a supporting frame 11 and the second header similarly cast. In a modification the tubes have enlarged ends so that the metal 4 does not produce a reduced bore.