baber/WOPTO huggingface dataset:
Patent GB-1515261-A (GB)
Title: Process for preparing pure phosphoric acid
IPC: C01B25/234
Filed: 1977-01-05
Abstract: 1515261 Purifying wet process phosphoric acid TOYO SODA MFG CO Ltd 5 Jan 1977 [13 Feb 1976 (3)] 00199/77 Heading C1A Sulphate ions are removed from phosphoric acid of H 3 PO 4  concentration greater than 70 weight per cent and which is prepared by extracting a crude wet process phosphoric acid with an organic solvent and back extracting with water, by adding a barium compound, the amount of the barium compound being less than the stoichiometric equivalent of the sulphate ions so that at least 5 wt. p.p.m. of the dissolved sulphate remains in solution as SO 4 <SP>2-</SP>, and separating the resulting barium sulphate from the slurry at a temperature lower than 80C. The addition of the barium compound may be carried out in stages and all or part of the barium sulphate produced after the second or subsequent addition step may be recycled to the first step to act as seed crystals. Precipitation of the barium sulphate and any arsenic impurities present is facilitated by treating the phosphoric acid, after the addition of the barium compound, with hydrogen sulphide after each addition of the barium compound. The barium compound may be added in the form of a solid, an aqueous solution or a phosphoric acid solution. Suitable barium compounds specified are Ba(OH) 2 , BaCO 3 , Ba 3 (PO 4 ) 2 , BaS, Ba(NO 3 ) 2  and BaCl 2 . The crude wet process phosphoric acid may be treated with Ca(OH) 2  prior to the organic solvent extraction step. Organic solvents referred to are n-butanol and tributylphosphate. The phosphoric acid may be concentrated after the back extraction and before addition of the barium compound.
Patent GB-228319-A (GB)
Title: An improved manufacture of aperient salts
IPC: A61K33/06
Filed: 1924-01-03
Abstract: Sodium magnesium sulphate, Na2SO4.MgSO4.6H2O which is a dry non-caking salt suitable for use alone or in admixture with other salts as an aperient, is prepared by melting sodium and magnesium sulphates in their water of crytallization and maintaining the mixture at about 70 DEG  C.  If a cake forms at the bottom it is removed to another vessel, broken up and mixed with the liquid that stood above it, the operation being repeated if necessary until a clear liquid is formed.  Small crystals form after a time and are separated from the mother-liquor and dried.
Patent GB-709585-A (GB)
Title: Process for the production of tropic acid and derivatives and analogs thereof
IPC: C07C59/48
Filed: 1952-01-03
Abstract: An acid having the general formula <FORM:0709585/IV (b)/1> wherein R is an aromatic hydrocarbon group of 1-2 rings having less than 15 carbon atoms, a thienyl group, or a lower alkylated thienyl group having from 5 to 10 carbon atoms; and R1 is hydrogen, a lower alkyl group having from 1-6 carbon atoms, a lower alkoxy group having from 1-6 carbon atoms, a thienyl group, a lower alkylated thienyl group having from 5-10 carbon atoms, or an aryl, an aryloxy or aralkyl group wherein the aromatic radical comprises 1-2 rings having less than 15 carbon atoms; is obtained by reacting formaldehyde with a salt of an organo metallic compound of the general formula <FORM:0709585/IV (b)/2> wherein X is halogen and hydrolising the resulting complex.  As salt of the organo metallic compound there may be used a salt, e.g. the sodium salt of a -carboxybenzylmagnesium halide, a -carboxy-(2-thienyl) magnesium halide, a -carboxy-(p-xenyl) methyl magnesium halide, 2-phenyl-a -carboxybenzyl magnesium halide, a  - benzyl - a  - carboxybenzyl magnesium halide, or a -phenoxy-a -carboxybenzyl magnesium halide.  The organo-metallic compound may be obtained by reacting a compound of the formula <FORM:0709585/IV (b)/3> wherein M is a cation, e.g. sodium, calcium or ammonium phenyl acetates, with magnesium and a lower alkyl halide having from 1 to 6 carbon atoms, e.g. isopropyl chloride.  Examples also describe the use of a -(2-thienyl)-a -carboxybenzyl-, a  - (2 - thienyl) - a  - carboxy - (2 - thienyl), a -methyl-a -carboxybenzyl, a -butyl-a  - carboxybenzyl, a  - ethoxy - a  - carboxybenzyl, a  - benzyl - a  - carboxy - (1 - naphthyl) methyl, a -carboxy-(3-thienyl), a -(p-xenyl)-2-carboxy-(p-xenyl) methyl, a -(2-phenethyl)-a -carboxy - (2 - thienyl), a  - (1 - naphthyl) a  - carboxy - (2 - thienyl), a  - (o - tolyloxy) - a  - carboxy - (2 - thienyl), a  - carboxy - (5 - methyl-2-thienyl) and a -carboxy-(3-t.-butyl-1-naphthyl) methyl magnesium halides as organometallic compounds.
Patent GB-1433851-A (GB)
Title: Method and device for driving a matrix type liquid crystal display element
IPC: G09G3/36
Filed: 1974-01-03
Abstract: 1433851 Matrix displays HITACHI Ltd 3 Jan 1974 [10 Jan 1973] 00244/74 Heading G5C A method of driving a liquid crystal display panel with crossed conductor arrays comprises applying alternating voltages of Vo/2 and Vo/6 to selected and non-selected conductors where Vo is the threshold potential of the panel whereby a potential of Vo is applied to selected cells and Vo/3 to non-selected cells. The driving circuit includes A.C. sources of Vo/2 and Vo/6 in opposite phase; inverters and line drivers including S.C. switches operated by logic signals. The panel may be operated in the line scan mode.
Patent GB-215046-A (GB)
Title: An improved means for supporting the moulding box or pattern plate of a foundry moulding machine
IPC: B22C11/00
Filed: 1923-01-04
Abstract: 215,046. Cash, J. Jan. 4, 1923. Moulding-machine.-Mould lifting mechanism, particularly for jar ramming machines, comprises rods 9 having heads 8 passing through holes in the pattern plate and continually engaging the underside of the flask 4. The rods slides in sleeves 10 between which and the heads 8 springs are located. The sleeves 10 are grooved at 16a for engagement by ribs in the sides of slots in the ramming-head to causes the sleeves to reciprocate with the head. The sleeves 10 slide in outer sleeves 11 adjustably secured to radial arms 13 fixed to the machine pedestal. Pawls 22 carried in slots 19 of the sleeves 10 engage teeth 15 in the rods and are controlled by leaf springs 26 carried by a telescopic guard 24. A second set of pawls 32 are carried by rock shafts in the sleeves 11. Curved arms 35 on the rock shafts enable the pawls 32 to he coupled in pairs by chains 36 passing over sprocket wheels on a shaft 38 operated by a handlever 40 fitted with a spring detent 41 engaging a series of three notches 42 in a fixed disc 43. Movement of the lever is limited by pins 44. When the detent is in the lowest notch both sets of pawls are disengaged, the upper ends of the levers 35 tripping the pawls 22 by pins 27 that project through the guard, and the rods 9 fall to their lowest position, that shown in Fig. 1. When the detent is in the centre notch the lower pawls only are disengaged and the rods 9 reciprocate with the machine head during jarring. With the detent in the upper notch both sets of pawls are disengaged and the flask may be jacked up to any height within the limits of the rods 9 by one or more reciprocations of the head. In modifications the controls of the pawls are varied and in some cases only one set of pawls is employed.
Patent GB-898970-A (GB)
Title: Improved dry shavercasing
IPC: B26B19/38
Filed: 1960-01-05
Abstract: 898,970. Dry shavers. SPERRY RAND CORPORATION. Jan. 5, 1960 [Jan. 5, 1959], No. 307/60. Class 131 5, 1960 [Jan. 5, 1959], A dry shaver casing 1 comprises moulded plastic sections 2, 3 assembled to form a cutter head support 4 and a compartment 14, housing the motor, by clips 9, 12 engaging ribs 8 and shoulders 11. The sections have aligning projections 25 engaging in recesses 26 and recesses 22 for rubber &c. motor supports 23 and are connected by the clip 9 prior to insertion of the motor, starting wheel 35, and latch 33 for a protective cover, the sections then being secured in abutting relation by the T-shape clips 12 which have a leg 15 under which is slipped a plate 6 which carries the cutter heads. In a modification shown in Fig. 6 a strip-like clamping clip 31 has a central aperture for passage of drive members 36 and downwardly bent edges 32 engaging over opposite sides of upstanding edge portions 30 of the casing.
Patent GB-892693-A (GB)
Title: Cathode ray tubes
IPC: H01J29/18
Filed: 1961-01-04
Abstract: 892,693. Cathode-ray tubes. WESTERN ELECTRIC CO. Inc. Jan. 4, 1961 [Jan. 13, 1960], No. 362/61. Class 39(1) Reflection of external light from and halation effects in a screen of a cathode-ray tube are minimised by a three component sandwich comprising first quarter-wave plate Q 1 , a polarizing plate P and a second quarter-wave plate Q 2  arranged so that the optical axis of each quarter-wave plate is at an angle of 45 degrees with the optical axis of the polarizer and in optical contact with and on the outside of a tube face 6 which has a fluorescent screen 5 on the inside, each component of the sandwich being composed of a base material having a refractive index equal to that of the glass forming the tube face. Light from an external source 25 is linearly polarized, e.g. vertically at 20 by the polarizer P, rotated through 45 degrees by the quarter-wave plate Q 1 , reflected at a surface of the tube face 6 and is further rotated through 45 degrees by plate Q 1  and is hence polarized horizontally, and absorbed at 21 by the polarizer P. Similarly halation effects are eliminated since a ray 14 reflected at the outside surface of the quarter-wave plate Q 2  is absorbed at 23 by the polarizer P. The first quarter-wave plate Q 1  may be omitted, when only halation effects are minimised.
Patent GB-274391-A (GB)
Title: Improvements in kinematograph apparatus
IPC: G03B17/26
Filed: 1926-09-28
Abstract: 274,391. Thornton, J. E. Sept. 28, 1926. Kinematograph apparatus. -The means c<2> for feeding, shifting, or exposing the film in a camera, projector, &c., is placed in front of a supply spool A and receiving reel D arranged one behind the other; the film path lies wholly in one plane, and the film does not, after passing the exposure position, return behind that position on its way to the receiving reel. The exposing means may comprise a hollow sprocket c<2> without a gate, or may comprise a spring gate with a claw or sprocket feed: continuous feed sprockets a, d may be provided. The positions of the spool A and reel D may be reversed, and, in the case of a projector, the lamp and condenser may be arranged in an aperture passing right through the body of the apparatus. The apparatus may be provided with a case comprising parts E<1>, E<2>, Fig. 5, hinged at b to the main framework B and provided with handles e<1>, the parts being held in the open position, as shown, by slotted spring-pressed struts e<3>, so as to form a large base for the apparatus. Alternatively, the framework B may be provided with flat sides similarly arranged and held to form a base. Specification 7817/96 is referred to.
Patent GB-103143-A (GB)
Title: Improvements in Machines for Discharging and Charging Gas Retorts.
IPC: C10B35/00
Filed: 1916-01-11
Abstract: 103,143. Guest, A. A., Gibbons Bros., and Wigley, J. Jan. 11, 1916. Charging and discharging.-An apparatus for charging and discharging retorts comprises a jointed sectional trough in which works an endless drag-bar chain adapted to feed the charge over the ram head at the forward end of the trough during its withdrawal from the retort. The trough A consists of a number of sections jointed together and provided with side rollers 10, which work in channel guides C<1> arranged concentrically with a large sprocket-wheel E. The drag-bar chain B engages with the teeth 4 of the wheel E and passes over end rollers 1, 2, the latter of which is spring-mounted for taking up slack, and over intermediate rollers 3 at the upper parts of the trough sections. The front section A<1> is longer than the remainder, and its bottom part curves downwards at 15 and then upwards in front of the roller 1 until it extends up to about half the height of the retort. The ram head 18 is pivoted at its upper edge to the section A<1>, so that it will ride over any coal which may be on the bottom of the retort. In operation, the trough is run into the retort to discharge the coke by a gear-wheel G engaging a rack 6 on the underside of the trough sections, the wheel E meantime turning freely so that the dragbar chain is not moved relatively to the trough. When the ram head 18 reaches the end of the retort, the slide 31 controlling the feed-shoot F is withdrawn, the wheel E is clutched to its driving.mechanism, and the chain B is operated so that the lower lap feeds the coal along tho trough and over the ram head 18. As the charging proceeds, the scoop is withdrawn gradually from the retort. The level to which the retort is filled may be controlled by an horizontal deflecting-plate fitted above the ram head. The drag-bar chain may consist either of a single chain with projecting side bars, or of a pair of chains with the bars extending across the trough from one to the other.
Patent GB-239099-A (GB)
Title: Improvements in or relating to combined razor strop and case
IPC: B24D15/08
Filed: 1925-01-07
Abstract: 239,099. Kattell, S. M. Jan. 7, 1925. Cases combined with razor strops.-A combined razor strop and case comprises a flexible backing 1 having flaps 10, and a lining 2 carrying pockets 3, 4 for a razor and blades. To the upper end of the backing is secured a ring 6, and upon the lower end is secured a removable razor strop 9. A tab 11 is formed on the backing and carries a fastener 12. When closing the case, the flaps 10 and the ring 6 are folded in, the strop then being folded, the fastener 12 engaging a member on the rear of the backing.
Patent GB-130058-A (GB)
Title: Improvements in Air Speed Indicators particularly applicable to Aircraft.
IPC: G01P5/16
Filed: 1918-01-10
Abstract: 130,058. Blackburn Aeroplane & Motor Co., and Booth, H. Jan. 10, 1918. Venturi, Pitot-tube, and other measuring - apparatus. -An air-speed indicator for aircraft comprises a transparent tube 1 containing a loose disk 4 secured to the lower end of the tube by a spiral spring 5 or by strands of india-rubber, a single strand of rubber being secured to the upper side, in the second case, to keep the lower ones in tension. Communicating with the lower end of the tube 1 is the pressure tube of a Pitot or similar device, the static-pressure tube being connected to the upper end. The speed is shown on an external scale, the disk 4 acting as the index. The arrangement of the parts may be reversed, the disk 4 being connected to the upper end of the tube 1.
Patent GB-1172121-A (GB)
Title: Shielding Device
Inventor: RAMSEY LESLIE JOHN
IPC: G03B42/04
Filed: 1967-01-05
Abstract: 1,172,121. X-ray cassette-radiation shield. ILFORD Ltd. 12 Jan., 1968 [5 Jan., 1967], No. 686/67. Heading H5R. [Also in Division G6] In an X-ray film holder, a portion of the film it contains is shielded from X-radiation by a " blocker " which comprises a sheet of metal of a thickness sufficient to prevent the radiation incident upon it during a radiographic exposure from fogging the film behind, said metal sheet being totally enclosed in a covering of plastics material, this covering having on one external face thereof a layer of pressure-sensitive adhesive, by means of which the blocker is attached to the X-ray film holder. Preferably, the metal sheet is lead and is 0À02 inch thick, the plastics material being heat sealable and preferably poly-vinyl chloride. The preferred adhesive is rubber latex.
Patent GB-1455752-A (GB)
Title: Production of resins
IPC: C08L25/00
Filed: 1974-01-08
Abstract: 1455752 Graft polymer compositions MONSANTO CO 8 Jan 1974 [9 Jan 1973 1 Oct 1973- 00749/74 Heading C3G A resin is produced by mixing, at 120‹ to 180‹ C., (A) from 50 to 90 parts by weight of a first composition comprising (a) from 40 to 80% by weight of a first copolymer of a monovinylidene aromatic monomer and an alkene nitrile in a weight ratio of from 90 : 10 to 10 : 90, the copolymer having a weight average molecular weight of from 75,000 to 500,000; and (b) the balance up to 100% of a monovinylidene aromatic monomer and an alkene nitrile in a weight ratio of from 90 : 10 to 10 : 90; the composition having the physical form of a homogeneous hot melt and an initial temperature of 130‹ to 180‹ C.: and (B) correspondingly from 50 to 10 parts of a second composition comprising (a) from 30 to 69À9% by weight of a graft polymer of a substrate of an alkadiene elastomer whose glass transition temperature is below 0‹ C. and a superstrate of a copolymer of from 90 to 10 parts of a monovinylidene aromatic monomer and 10 to 90 parts of an alkene nitrile, the amount of graft superstrate being from 5 to 75 parts for every 100 parts of substrate and the weight average particle size of the graft polymer being from 0À25 to 2À0 microns; (b) from 0À01 to 40% of a second copolymer of from 90 to 10 parts of a monovinylidene aromatic monomer and from 10 to 90 parts of an alkene nitrile, the second copolymer having a weight average molecular weight of from 50,000 to 500,000; (c) from 69À9 to 30% of an organic liquid having a boiling point of from 25‹ to 150‹ C. at atmospheric pressure which is substantially non-chemically reactive with the graft polymer and causes the graft polymer to swell by not more than 25% by volume; and (d) from 0 to 15% by weight of water: the second composition being in the form of a dispersion of the graft polymer in the organic liquid and having an initial temperature of from 0‹ C. up to the boiling point of the liquid; and introducing the mixture into a flash vaporization zone where it has a surface to volume ratio of at least 2À5 : 1 and maintaining the mixture in the zone at from 120‹ to 280‹ C. and a pressure of 0À001 to 800 mm. of Hg absolute for from 1 to 10 minutes while removing vapours volatilized from the mixture from the zone such that, when removed from the zone, the devolatilized mixture comprises at least 97% by weight of a combination of the first and second copolymers and the graft polymer. The organic liquid in the second composition may be styrene and/or acrylonitrile. The mixing and introduction into the vaporization zone may be conducted sequentially or simultaneously. Examples are given in which a dispersion of styrene-acrylonitrile copolymer in styrene and acrylonitrile is mixed with (a) a dispersion in acrylonitrile of a graft polymer formed by grafting styrene and acrylonitrile on to particles of mixed butadiene-acrylonitrile rubbers having sizes of about 0À28 Á and about 0À68 Á.
Patent GB-245801-A (GB)
IPC: A21D2/04
Filed: 1926-01-11
Abstract: 245,801. Loon, J. van. Jan. 10, 1925, [Convention date]. Bleaching flour and meal. - To enhance the bLeaching and preserving action of ammonium persulphate or other percompounds on flour and other milling products, addition is made of a finely-divided crystalline substance such as quartz exerting only a mechanical action on the other substances. The crystalline substance is added in the proportion of one part to ten thousand parts of flour &c.
Patent GB-602148-A (GB)
Title: Ice cube manufacturing apparatus
IPC: F25C1/10
Filed: 1946-01-09
Abstract: 602,148. Ice-making. DEHN, S. G. (Barium Steel Corporation). Jan. 9, 1946, No. 822. [Class 29] Ice cubes are made in moulds 29 on the periphery of a rotary hollow drum 26 the lower part of which is immersed in the water to be frozen, an evaporator cylinder 37 being located within the hollow drum and forming a brine chamber 42 between the exterior of the cylinder and the interior of the drum, the evaporator chamber 39 being formed in the lower part of the cylinder. The mould drum 26 has insulated end walls 25 rotatably mounted on a hollow stationary shaft 14 supported between the insulated walls 10 of the outer casing, and is driven by a gear wheel 48. Surrounding the drum is a cylinder 30 partially filled with the water to be frozen into which the moulds dip, this cylinder is rotatably mounted on rollers 33 so that it can be turned by a handwheel and gearing from the position shown, in which a filling opening 36 registers with a dobr 12, to a position in which the opening is at the bottom of the cylinder. Fixed to the stationary shaft 14 within the mould drum 26 is the evaporator cylinder 37 divided by a semi-circular partition 38 to form an evaporator space 39 supplied with refrigerant by a pipe 40. A suction pipe 41 returns evaporated refrigerant to the compressor. Brine is supplied to the space 42 between the cylinder 37 and the drum by a pipe 43 and is withdrawn by a pipe 44. The spaces 58 of the drum between the moulds are insulated. In operation the water cylinder is filled to the level 57, refrigerant and brine are supplied to the spaces 39 and 42, and the drum 26 is rotated at about eight revolutions per minute. When the moulds are filled with ice the compressor is stopped and warm brine fed to the brine chamber 42 to thaw the cubes. The hand wheel is then turned to bring the opening 36 to the bottom to drain the water and released ice cubes to a perforated chute from which the cubes pass to a sliding drawer at the base of the casing.
Patent GB-338421-A (GB)
Title: An improved centrifuge, particularly for non-uniform filling, e.g. of articles for washing
IPC: D06F49/00
Filed: 1930-01-09
Abstract: 338,421. Krauss, F. E. Jan. 9, 1930. Driving, supporting, balancing.-A centrifuge, particularly for use with washing apparatus, has a drum suspended so that it can rock freely, and with lateral play between the rocking- bearing surface and the drum supporting point; the machine is driven by an air blast. The drum g has a central conical shell which carries a ball g<1> and a knob g<11>. The. ball g<1> rests on a bearing cup f<1> on the shell f supported by the framework b which carries the motor d. A rubber ring c is inserted between the motor and the framework to absorb vibration. Vanes e are arranged on the shaft of the motor, and form the blower for driving the drum g which is provided with paddles e<1>. With an unbalanced load, the drum can move laterally and can also oscillate about the ball pin g<1>. The casing a has a cover h which is lifted clear of brake blocks m on the drum by air pressure when the motor is running. A brake block i can be applied to the knob g<11> by pressure applied to the head i<1>. This brake mechanism is connected by cables k<1> to bolt pins l in the casing flange so that, the pins l can only be withdrawn and the casing opened when the drum is at rest. The casing has a gutter a<1> with a siphon-like discharge pipe a<11> for the escape of excess water. Part of the compressed air may blow through the drum to assist in drying the contents. In the modification shown in Figs. 5, 6 the cover h has an internal transverse flange r which fits tightly on the drum, and so divides the annular space of the casing into two chambers. Compressed air passes from the lower chamber to the enlarged volute portion q, and is led by the flexible pipe o through the lid of the cover into the drum g. It passes, then, into the upper part of the casing and through a flap valve into the atmosphere. The drum can be braked by means of the air current.
Patent GB-538720-A (GB)
Title: Improvements in or relating to buildings or structures
IPC: E04B2/02
Filed: 1940-03-16
Abstract: 538,720. Walls; building blocks. SEWELL, H. March 16, 1940, No. 832. [Classes 20 (iv) and 87 (i)] A hollow wall adapted to be filled with sand, cement &c. is built of hollow blocks having tapering walls 11 ... 14 which have their front or rear edges ribbed and grooved as shown at 15 to interlock. Vertical reinforcement rods 16 are located in the vertical - passages and horizontal reinforcement rods 17 in notches 18 or curved recesses in the end walls. The edges of the adjoining walls of the blocks may be chamfered at 19.