baber/WOPTO huggingface dataset:
Patent GB-401612-A (GB)
Title: Improvements in or relating to the extraction of purification of sodium chloride
IPC: C01D3/18
Filed: 1933-06-14
Abstract: Sodium chloride is recovered from substances containing it, such as rock or sea salt, by extracting with liquid ammonia, separating insoluble substances, and evaporating the solution obtained.  The whole of the sodium chloride may be recovered by evaporating the solution to dryness, or a part may be recovered by heating to 30 DEG C. and the mother liquor be used to extract more sodium chloride. Extraction is preferably effected at a temperature between 0 and -- 10 DEG  C., as below -- 10 DEG  C. a less soluble ammonium compound of sodium chloride, NaCl.x.NH3, is formed.  The recovered salt is completely freed from ammonia by heating to 150-200 DEG  C. under reduced pressure.  The solution of sodium chloride in liquid ammonia after evaporation to remove excess ammonia may be treated with water to obtain a solution for use in the production of sodium bicarbonate.
Patent GB-330137-A (GB)
Title: Improvements in infinitely variable speed transmission mechanism
IPC: F16C3/28
Filed: 1929-06-04
Abstract: 330,137. Teece, S. H. June 4, 1929. Variable - speed ratchet gearing comprises variable driving eccentrics with inner and outer eccentric parts 3, 4. Fig. 2, connected by helical threads 11 and grooves 10. The outer eccentrics 4 move together axially, and a spring 16 encircling the driving-shaft 2 tends to hold them in the position of maximum throw. The load tends to diminish the throw and compress the spring 16 so that there is automatic adjustment of the speed of a driven shaft 9 to suit the load upon it. Manual control may be superposed by a lever 21. Guides 26 are provided for connecting-rods 7 to allow the eccentrics 4 to slide through them. Ratchets 28 driving the shaft 9 are preferably in pairs as shown. When reversed drive is required, a clutch 41, Fig. 4, connecting two parts 9<a>, 9<b> of the shaft 9 is disconnected, and the gear and clutch 43, 41 is moved so that the drive passes through train 43, 46, 48, 49, 52.
Patent GB-1069035-A (GB)
Title: Improvements in or relating to methods of preparing multi-stable ferrite materials
Inventor: GLAISTER RAYMOND MALCOLM
IPC: H03K3/45
Filed: 1965-04-22
Abstract: 1,069,035. Magnetic structures. STANDARD TELEPHONE & CABLES Ltd. April 15, 1966 [April 22, 1965], No. 17043/65. Heading H1H. A ferrite having at least 3 stable states o<SP>f</SP> magnetization is produced by inducing in a bi-stable ferrite a magnetic condition intermediate between the two fully switched conditions, and subjecting it to a heat treatment to introduce a stable state corresponding to the intermediate condition. The initial ferrite, preferably CO x Fe<SP>2+</SP> 1-x Fe 2 O 4 , where  x  is 0À025- 0À2, may be prepared by milling the constituents, pre-firing, re-milling, pressing into toroids, firing in CO 2  at 1350‹ C., annealing at 200‹ C. in an alternating field of frequency 50 c./sec., and magnitude first 100 oe. then 25 oe., and cooling in the field. The toroid is then pulsed (starting at remenance) until partial switching occurs, and in this state is heated at 70-250‹ C. The toroid may have a zone of reduced thickness (see Fig. 4). The stable states correspond to horizontal peaks in the hysteresis curve (see Figs. 5 and 6b).
Patent GB-889240-A (GB)
Title: Improvements in and relating to dishwashing machines
Inventor: GILSON ROBERT JOHN
IPC: A47L15/22
Filed: 1958-05-28
Abstract: 889,240. Fluid actuation of switches. COLSTON Ltd., CHARLES. May 28, 1958, No. 17070/58. Class 38 (5). [Also in Group XXIII] A dish-washing machine has a heater switch which is normally open but is actuated to close by circulation of the liquid. As shown, a diaphragm 26 is held between a cover 21 and a body 24, a central opening 28 in the cover being in communication with the liquid in the washing-machine, which liquid, when circulating, exerts a pressure on the diaphragm through an air column. A thrust plate 42 has a well 43 engaging a well in the diaphragm and accommodating a thrust pin 41 which causes a spring blade 37 to move from a position in which contacts 36 and 35 are open to one in which they are closed when the pressure of the air column increases. A snap action is obtained by means of a toggle device comprising a component 45 having two V-shaped grooves, one engaging the spring 37 and the other a lug 49 on a thrust plate 50 loaded by an adjustable spring 58. Specification 832,756 is referred to.
Patent GB-110642-A (GB)
Title: Process of Drawing Molten Glass or like Material in Cylindrical Form.
IPC: C03B17/04
Filed: 1916-11-29
Abstract: 110,642. Marks, E. C. R., (Libbey Gdass Co.). Nov. 29, 1916. Drawings. - A method of drawing molten material such as glass, in either hollow or solid cylindrical form, consists in directing a stream of the molten material on to the exterior surface of a rotating member and drawing the material from the said member. The molten glass is placed in a trough 3, Fig. 5, above a furnace 2, and, after flowing down a step to eliminate air bubbles, passes beneath an adjustable gate and flows in a small stream A on to the exterior of a rotating blow-pipe 13, Fig. 4, situated in an independently heated chamber 7. The blow-pipe preferably projects into a casing 24 which may be continuously rotated on wheels 25 so as to radiate heat uniformly to the glass upon the blowpipe. The casing is enlarged at the exit portion 24<b> thereby allowing a slight cooling of the glass before leaving the blow-pipe. In operation, the glass stream A winds around and flows down the rotating blow-pipe, and is drawn off in the form of a tube B by means of any suitable drawing device, air under slight pressure or at atmospheric pressure being continuously supplied to the blowpipe. In drawing a solid rod, the end of the blow-pipe is closed by an imperforate tip. In a modification, Fig. 7, the blow-pipe 13 is surrounded by a conical casing which is partially filled with molten glass, the thickness of the glass film being regulated by the size of the outlet.
Patent GB-642595-A (GB)
Title: Improved means for enabling brackets and other fittings and fastenings to be securedto surfaces of plaster board, plywood and the like
IPC: F16B37/02
Filed: 1947-06-30
Abstract: 642,595. Bolting. TREVARTHEN, W. G. June 30, 1947, No. 17152. Convention date, Feb. 8,1946. [Class 89(i)] For fixing articles to plaster board, plywood &c. by screws. or nails a panel 1, Figs. 1 and 2, of material suitable for receiving screws &c. is secured to the board by a bolt 5 and elongated nut 3 passed through a slot 4 and turned to cross it. The nut has a part 3a that fits in the slot and prevents turning during the tightening of the bolt. For use with wood screws the member 3 may be of wood. The member may be initially bowed to exercise spring pressure on the board and the ends may be provided with teeth to bite into the board. The panel 1 may also be provided with teeth or projections. The bolt 5 may be integral with a hook, an eye, or may be otherwise formed to permit the direct suspension of articles. For fixing mirrors &c. these take the place of panels such as 1.
Patent GB-1388764-A (GB)
Title: Containers of plastics material and closures therefor
IPC: B65D41/04
Filed: 1972-04-13
Abstract: 1388764 Container closures VAN LEER VERPAKKUNGEN GmbH 13 April 1972 17159/72 Heading B8T A screw closure 2 has a circular rib 3 of wedge-shape in cross-section which engages a groove 4 in a mouth 1 of a plastics container. The width of the groove 4 is equal to or less than the depth, and the sides of the groove may be equal in height or one may be shorter than the other, Figs. 3 and 4 (not shown). In one embodiment, Fig. 5, an insert 9 carries a rib or flange 10 and dispensing of a liquid is effected through an aperture formed in a blind hole 12. A cap without a rib 3 may be screwed over the insert. The closure may be formed as a crown cork or a snap-on closure and may be of metal or plastics material.
Patent GB-1365189-A (GB)
Title: Control valves for hydraulic fluids
IPC: F16K31/08
Filed: 1973-04-27
Abstract: 1365189 Valves GIRLING Ltd 27 April 1973 [14 April 1972] 17202/72 Heading F2V A three-way solenoid valve comprises an inlet 14, outlet 13 and exhaust (from annular passage 36), a valve member 20 urged against a first seat 21 by a spring loaded push rod 32, and a second seat 22 by fluid pressure after activation of a solenoid 24, wherein the valve is characterized by making the valve member 20 or seat member 9 a permanent magnet and the other of these parts of magnetizable material such that an additional magnetic closing force is created which tends to centre the valve member on the seat. The fluid from the inlet can pass to the outlet when the solenoid is activated by overcoming the magnetic closing force and flowing through a passage (not shown) in an insert 16.
Patent GB-418323-A (GB)
Title: Improvements in or relating to hack saws
IPC: B23D51/03
Filed: 1933-06-19
Abstract: 418,323. Saws. NEILL & CO. (SHEFFIELD), Ltd., J,., and DAWSON, R., Napier Street, Sheffield. June 19, 1933, No. 17375. [Class 61 (ii).] In a hacksaw of the kind having provision for the storage of spare blades, the tubular frame is in two parts 13, 16 in telescopic engagement so that the spare blades 15 may be received in the back, the part 16 abutting against a stop 17 on the other part, or the two parts may engage end on and be held together by a sleeve. One end of the back of the frame may have an opening fitted with a plug or cover.
Patent GB-775942-A (GB)
Title: Improvements relating to pressure exchangers
Inventor: JENDRASSIK GEORGE
IPC: F02B33/00
Filed: 1955-06-17
Abstract: 775,942. Pressure exchangers. JENDRASSIK DEVELOPMENTS, Ltd. June 17, 1955, No. 17559/55. Class 8(1) In a pressure exchanger a control plate 10 having orifices 13<SP>1</SP>, 14<SP>1</SP> is positioned between the cell ring 1 and the ends of the ducting 13, 14 adjacent the end of the cells and is adjustable circumferentially relative to the ducting at the remote end of the cell whereby the timing of the opening and closing of the adjacent ends of the cells is altered relatively to the timing of the opening and closing of the remote ends of the cells: The orifices 13<SP>1</SP>, 141 may be so dimensioned that the adjustment of the plate 10 varies the area of the ducts 13, 14. Adjustment of the plate may be made by hand or automatically in response to the speed of the cell ring or other operating condition of the exchanger or associated apparatus e.g. an I.C. engine supercharged by the exchanger. The plate 10 may be split into two or more circumferential portions each portion being adjusted in response to a different operational condition. The exchanger may be of the radial flow type and have a fixed or rotating cell ring. Both ends of the exchanger may be fitted with an adjustable control plate. Specification 775,271 is referred to.
Patent GB-495432-A (GB)
Title: Manufacture of 5-halogen-and 5-hydroxy-trimellitic acids
IPC: C07C51/16
Filed: 1937-06-24
Abstract: 5-Halogen-trimellitic acid is prepared by oxidizing 5-halogen-pseudocumene.  Heated with an alkali or substance having an alkaline action it yields 5-hydroxy-trimellitic acid, 5-halogen pseudocumene may be obtained by halogenating pseudocumene. Examples describe the preparation of 5-chloro and 5-bromo trimellitic acids employing potassium permanganate as oxidizing agent, and hydrolysis of the 5-halogen acid with caustic soda or with piperidine to yield the 5-hydroxy acid.
Patent GB-708893-A (GB)
Title: Improvements in or relating to computers of the slide rule type
IPC: G06G1/12
Filed: 1950-10-30
Abstract: 708,893. Calculating-apparatus. BATORI, O. E. Oct. 30, 1950, No. 17601/52. Divided out of 708,811. Class 106 (1) A logarithmic calculator, of similar construction to that described in Specification 708,811 but modified for the solution of triangles, especially the wind triangle in air navigation, comprises co-operating logarithmic scales K and J on a pair of relatively rotatable discs 1 and 2, and inner logarithmic scales of the trigonometric functions of angles on the disc 2 read through an aperture 11 in an upper disc 3 secured to the disc 1. In the calculator shown, there is a double scale O on the disc 2 of logarithmic sine and cosine values which resolve wind into its components, and a logarithmic sine and tangent scale M for drift angle. Both these scales appear in the window 11 and are read at a pointer 17. To calculate the wind correction angle (drift), the cross-wind component is first read off scale K against wind force on scale J after setting wind angle on scale O against the pointer 17. Cooperating linear angle scales P and Q are marked on the discs 2 and 3 for initially finding wind angle from the wind and course directions. By setting air-speed on scale J against this value of cross-wind on scale K, the wind correction angle is shown by pointer 17 on the scale M. To calculate ground speed, the wind angle is set on the cosine scale 0; the tail wind component can then be read off scale K against wind force on scale J, and is added to the air-speed to obtain ground speed. The disc 2 is also provided with a logarithmic latitude scale L for calculating geostrophic cross-wind from pressure gradient ascertained from change in altimeter reading during level flight. The cross-wind is read off scale K against latitude on scale L after setting the flight distance on scale J against the change in altimeter reading on scale K. A logarithmic tangent scale N is also marked on the disc 2, and may be used for finding the direction between two points from their latitude and longitude differences.
Patent GB-497744-A (GB)
Title: Foot arch support
IPC: A43B7/22
Filed: 1937-06-24
Abstract: 497,744. Foot arch supports. STERN, E. June 24, 1937, No. 17631. Convention date, Sept. 17, 1936. [Class 17 (ii)] A foot-arch support comprises a limp inelastically deformable covering enclosing a non-hygroscopic and substantially inelastic powder material, the particles of which are displaceable and are distributed automatically according to the load on the material. The powder d may comprise synthetic resin, such as "Bakelite" (Reg stered Trade Mark), which has been heated and ground after cooling. The powder is contained in a bag b made of linen, canvas, soft leather, &c. fixed to a stiff or semistiff sole a of cardboard, vulcanized fibre, leather &c. A second bag c corresponding in size to the normal main arch of the foot is enclosed within the bag b and is partly connected thereto by sticking, sewing, or by other means. Both bags are loosely filled with the powder d and they overlap the inner concave edge e of the sole a. A heel pad f may be formed either as a continuation of the main bag b of the arch support or, preferably, as a separate pad. A metal bow g of horseshoe form having spikes h may be fixed underneath the heel part of the sole a. In a modification, the sole may be formed as a pocket filled with the powder or with one or more bags of the powder, one above, within, or behind the other. In the former case, the support is used for a time in that form and the powder is afterwards pressed towards the arch and its further movement is restricted by quilting.
Patent GB-660873-A (GB)
Title: Improvements in or relating to apparatus for straightening strip material
IPC: B21D1/02
Filed: 1949-07-05
Abstract: 660,873. Straightening. UNITED ENGINEERING & FOUNDRY CO. July 5, 1949 [July 26, 1948], No. 17706/49. Class 83 (iv). Apparatus for straightening strip, sheets, and the like, comprises lower and upper frames 11, 12, a number of straightening rolls 24, 27 rotatably secured within each of the frames, supporting means for the rolls, a flexible platen 35, in at least one of the frames extending across the inner portion thereof, backing up rolls 32 secured to the side of the platen adjacent the rolls, and pressure applying means secured to the opposite side of the platen engaging with the frame for controllably deforming the platen and thereby controlling the deflection of the rolls. The upper frame 12 may be adjusted vertically at either end against compression springs 20 by means of screws 13 rotated by hand wheels 18 through worm gearing. The upper backing rolls 32 are each mounted in a shaft 33 in a yoke 34 attached to the platen 35, on which are positioned pressure blocks 37 on wear strips 36. Each block 37 has a recess 38 which receives an eccentric 39 formed as an integral part of one of a number of shafts 41 extending longitudinally of the frame 12 and each separately rotatable through worm gearing and hand wheels so that equal pressure will be applied to the pressure blocks 37 associated with the respective shaft 41 to controllably deform the platen 35 and thus cause the corresponding backing rolls to bear against and deflect equally all of the straightening rolls at the same corresponding points. The straightening rolls supported in floating bearing blocks 23, 28 are provided with shaft extensions to which are connected by universal couplings or the like separate driven shafts of a power operated drive unit. In a modification, Fig. 5, the platen 129 is deformed by eccentrics 135 on shafts 136 acting through connecting rods 134 rotatably secured to shafts 133 in brackets 132 secured to the platen.
Patent GB-921353-A (GB)
Title: Life-saving raft
IPC: B63C9/04
Filed: 1961-05-16
Abstract: 921,353. Life-rafts. W. TANGER. May 16, 1961 [May 27, 1960; Aug. 24, 1960], No. 17752/61. Classes 113 and 114. A life-raft comprises a body 2 which is symmetrical about a central horizontal plane and is of toroidal shape and formed of a cellular flexible synthetic material. A deck 1 is formed on the horizontal plane which carries a container 4. Pivoted to the top and bottom sides of the raft are struts 10, 10<SP>1</SP> which support canvas or plastic hoods 5, 5<SP>1</SP> which can be opened from the topside to provide a canopy and a sea anchor. Buoyancy compartments 3 may be provided together with a canvas sheet 12 to support injured passagers. The raft may be polygonal or elliptical in plan.
Patent GB-1104130-A (GB)
Title: Improvements in or relating to printing devices for accounting machines or the like
IPC: B41J35/23
Filed: 1966-04-22
Abstract: 1,104,130. Ink-ribbon mechanism. ANKERWERKE A.G. 22 April, 1966 [26 April, 1965], No. 17766/66. Heading B6F. A separate multi-coloured inkribbon and ink-ribbon mechanism is provided so that top and underneath copies are printed in the colour required. The embodiment described is for an accounting machine printing on a voucher through an ink-ribbon 1 and on a tally strip 26 through an ink - ribbon 28. The mechanism for the ribbon 28 is mounted on a pivotal frame 24 so it can be shifted away from operative position. When in operative position it is locked so that a colour shift action effects both ink-ribbons. When recording, say, in black a cam 10 rotates, which operates a follower lever 9, a link 8, a double lever 5 whereupon arms 2 are moved forwardly and upwardly due to resting levers 11 so that the upper half (black) of the ink-ribbon 1 is at the printing line. No movement is transmitted to the levers 30a by a rotation of cam 10 so the ribbon 28 remains with its lower (black) area at the printing position. When a printing is required in red a lever (16), Fig. 2, is operated and by means of a control slide (15) and lever (14) a shaft 18, Fig. 1, is rotated clockwise which causes the levers 30a to pivot the ribbon 28 downwardly so its upper (red) area is moved into printing position. At the same time lever 19 on the shaft 18 lifts the ribbon 1 so its lower (red) area is also moved to the printing position.
Patent GB-562468-A (GB)
Title: Improvements in and relating to abrasive wheels
IPC: B24D5/16
Filed: 1942-12-15
Abstract: 562,468. Grinding wheels. NORTON GRINDING WHEEL CO., Ltd. Dec. 15, 1942, No. 17835. Convention date, Dec. 1, 1941. [Class 60] [Also in Groups II and V] A metal ring is moulded from metal powder under low pressure in the mould shown in Fig. 3. The ring is removed from the mould, some of the metal is machined from 'its periphery and the resulting ring 15 is replaced in the mould. The annular space between the ring 15 and the mould wall 10 is filled with a mixture 17 of diamond and metal powder bond, and the assembly is subjected to high pressure. The resultant diamond-faced metal ring is removed, sintered and machined to form on the metal part thereof a dovetail 21 and sloping surfaces 22, 23. The angle between a sloping surface 22 or 23 and the cylindrical periphery 17a of the ring must be between 15 degrees and 45 degrees, e.g. 20 degrees. The machined ring is then placed in another mould, Fig. 4, and a pre-formed, axially-perforated disc 36 of synthetic resin &c. is placed in position as shown. The assembly is then pressed hot and the resin &c. flows and interlocks with the dovetail. The abrasive surface may consist of one or more layers of diamonds. Instead of diamonds, fused alumina, emery, corundum, or carbide of silicon, boron, tungsten or titanium may be used. The metal bond may be one of those described in U.S.A. Specification 2,238,351 (e.g. 25 per cent each of copper, tin, iron and nickel), or in U.S.A. Re-issue 21,165 (e.g. 20 per cent tin and 80 per cent copper), or may be cobalt, nickel, iron, aluminium-silicon, aluminiumcopper or aluminium-iron. The disc 36 may be made of artificial resin (phenol formaldehyde, aniline formaldehyde, alkyd, methyl methacrylate polymer, styrene), shellac or rubber.