baber/WOPTO huggingface dataset:
Patent GB-1458128-A (GB)
Title: Process for removing fluorine from phosphoric acid
IPC: C01C1/16
Filed: 1974-02-07
Abstract: 1458128 Removing fluorine from phosphoric acid G E KIDDE 7 Feb 1974 [14 May 1973] 05743/74 Heading C1A Fluorine is removed from unconcentrated wet process phosphoric acid (i.e. containing less than 32% P 2 O 5 ) by heating a slurry of the acid and colloidal silica having a silica content of at least 1% by weight under reduced pressure and scrubbing the vapour thus produced with an aqueous solution of ammonium fluoride and/or ammonium bifluoride to give a solution containing ammonium fluosilicate and/or fluosilicic acid. The aqueous solution discharged from the scrubber is suitably neutralized with ammonia to a pH of 8À8 to 9À2 to precipitate silica and convert fluorine - containing compounds to ammonium fluoride. The resulting ammonium fluoride may then be fed to a stripper held at elevated temperature and reduced pressure to volatilize ammonia and convert the fluoride to ammonium bifluoride which may be recycled or isolated. In a preferred embodiment, wet process H 3 PO 4  containing 28 to 32% P 2 O 5  and fluorine is mixed with washed silica 11 to form a slurry containing at least 2% colloidal silica and is fed to a vacuum concentrator 12 which is operated at a temperature of 190‹ F. and a pressure of 50 to 180 mm of mercury absolute. The vapours 15 are passed to a scrubbing tower 16. A liquor 17 which contains either fluosilicic acid, ammonium fluosilicate and ammonium bifluoride or ammonium fluosilicate and ammonium fluoride and which contains 3À5 to 15% by weight fluorine is used to scrub the vapours. The liquid stream from the first stage vacuum concentrator 12 comprising partially defluorinated phosphoric acid 30 having a P 2 O 5  content in the range 36 to 41% is fed to a second stage 12A which operates in the same manner as the first stage except that the vacuum is preferably higher. The still more concentrated and defluorinated phosphoric acid stream 31 from the second stage is fed to a third identical stage wherein the P 2 O 5  content of the acid is raised to 54% and the fluorine content is reduced to below 0À5%. The scrub liquors from the three scrubbing stages 19, 19A and 19B are fed to a silica regeneration system wherein the solution is first treated with ammonia to adjust the pH to 3À5 to 5 to remove any free acid and is then passed to a second stage where further ammonia is added to give a pH of 8À8 to 9À2. The slurry is filtered 47 and the silica produced is passed to a series of countercurrent washes 51, 55, 60. The silica is dried and recycled to form the initial slurry with the phosphoric acid. A filtrate from the filtration stage 48 is polished and passed to a bifluoride stripper where it is heated at between 170‹ to 230‹ F. and a pressure of 12 to 40 inches Hg. The vapour stream 74 comprising ammonia and water is fed to a still 75 which produces an overhead vapour stream 76 containing 28% ammonia and 72% water. The liquid 84 from the stripper 71 is split into two streams 91, 92. The first stream 91 is recycled to the scrubbing stage. The remainder of the ammonium bifluoride is recovered.
Patent GB-177018-A (GB)
Title: Improvements relating to shower baths
IPC: A47K3/28
Filed: 1921-02-19
Abstract: 177,018. Davies, R. T. Feb. 19, 1921. Shower baths.-A portable container a is fitted with a valve e and a rose f, which are contained within a chamber formed by a flange d. The device is adapted to be raised by a cord attached to a handle. The container is discharged by means of cords h and a lever g at the end of the valve stem i.
Patent GB-650333-A (GB)
Title: Collets for establishing and maintaining a seal by the use of fluid under pressure
IPC: B21D15/10
Filed: 1948-02-26
Abstract: 650,333. Tube: joints. ROBERTSHAWFULTON CONTROLS CO. Feb. 26, 1948, No. 5753. Convention date, April 25, 1947. [Class 99(i)] [Also in Group XXII] Means for sealing the end of a tube, that is to be worked by fluid supply under pressure to its interior, comprise a body member mounting a nose piece; for insertion into the tube, there being a chamber between the body and nose with a circumferential gap in 'the outer wall, and a flexible diaphragms in the chamber projecting through the gap into contact with the tube under fluid pressure supplied'to the chamber. The invention is described with reference to corrugating a tube to form a bellows as described in Specification 508,630 [Group XXII]. The tube is held between two part dies 15 and against an end plate 16. Intermediate two part dies 13 are separated by removable spacers 14. The end of the tube is sealed by a mandrel having a body 32 screwed at 30 into an extension member 23 secured by screws 25 to an adaptor 22 screwed into a piston rod 11. The body 32 has a reduced end with a tapered flange 42, and a tapered nose 36 with a corresponding flange 41 screwed onto the reduced end. The space between the flanges forms a chamber 40 with a circumferential opening 43 through which a neoprene, rubber or like sleeve 44 can project to make sealing contact with the tube. Pressure fluid is supplied at 17 to an axial passage 33 leading to the interior of the tube and ports 37 admit the fluid to the chamber 40. In a modification the chamber 40 has an independent pressure supply similar to that at 17 and the ports 37 are omitted. The piston rod 11 serves to compress the dies axially of the tube, after. the spacers have been removed to complete the corrugation in known manner.
Patent GB-246333-A (GB)
Title: Improvements in or relating to gaskets, packings, shock absorbers, and the like
IPC: E06B7/23
Filed: 1925-03-03
Abstract: 246,333. Gibbs, F. J., and Middleton, C. G. March 3, 1925. Indiarubber springs. - A shockabsorbing gasket consists of a core of sponge or cellular rubber a enclosed in a sheath of canvas or the like b, the canvas being extended at one or more suitable positions to form flanges c by which the gasket is secured to a door or by nailing. Eyelets may be provided on the flanges. The canvas may be secured to the core by rubber solution.
Patent GB-707894-A (GB)
Title: Improvements in or relating to pens for recorder instruments
Inventor: WIKKENHAUSER GUSTAV
IPC: G01D15/16
Filed: 1951-03-12
Abstract: 707,894. Reservoir pens. KELVIN & HUGHES. Ltd. April 18, 1952 [March 12, 19511, No. 5890/51. Class 146(3) [Also in Group XXIX] A pen 32 for a recording instrument is supplied with ink from a container 23 through a flexible pipe 31, the container being supplied with compressed air, to force ink along the pipe 31, through pipes 14 and 20 by a pump 10 driven by an electric motor. A valve 16 has a threeposition rotary plug 17 provided with ducts 35, 36, 37 and 38. When the duct 35 connects the pipes 14 and 20 the pressure in the container is increased, air being supplied to the pump through an inlet port 21, the duct 36 and a pipe 15. In a second position, the pump intake is connected to the pipe 20 through the duct 37 and pipe 15 so as to withdraw air from the container to return ink from the pen, while the pipe 14 is connected through a duct 38 to an exhaust port 25. In a third position, the ports 21 and 25 are closed to maintain air pressure in the container 23.
Patent GB-1426064-A (GB)
Title: Apparatus for the dyeing or printing of lengths of  material
IPC: B41F15/44
Filed: 1973-02-07
Abstract: 1426064 Screen printing P ZIMMER 7 Feb 1973 [24 Feb 1972, 30 May 1972 and 1 Aug 1972] 5922/73 Heading B6C Dye under pressure is supplied to the screen 11 of a rotary screen printer from a stationary inverted trough 1 which has a slot 27 at its base covered by a perforated membrane 14, e.g. a nickel foil, held in intimate contact with the screen. The intimate contact is promoted by the resilience of the foil and dye pressure and may be assisted by the attraction of magnetisable rods 15 towards an electromagnet 22. The base of the trough is preferably of rubber.
Patent GB-163821-A (GB)
Title: Improvements in means for composing tabular matter in typographical composing and casting machines
IPC: B41B7/16
Filed: 1920-02-27
Abstract: 163,821. Linotype & Machinery, Ltd., and Ellis, H. Feb. 27, 1920. Assembling matrices.-Relates to means for facilitating the composition of tabular matter, and particularly to the construction of the special matrices used for separating the different measures of the line, and to the means for holding them in position during justification. The special matrix 1, Fig. 1, is formed with an aperture 2 for the reception of a dog or plunger, which is moved into engagement with it by the descent of the first elevator. The plunger 8, Fig. 2, is carried by an arm 7 on a shaft 6 which is supported on the vice-frame, a spring tending to turn the shaft so as to bring the plunger down into engagement with the matrix. The arm 7 is normally held in vertical position by a spring detent 31 which engages an arm 5 on the shaft, the detent being tripped, as the first elevator descends, by a projection 82. The descent of the arm 7 is regulated by a cam 4 on the elevator, which is engaged by a roller on the arm 5, and also serves to raise the arm 7 as the elevator rises. The plunger 8 is guided in the end of a yoke-lever 17, which is mounted on the shaft 6 and has a slight movement relative to the arm 7, from which it is normally separated by a spring 30. The arm 7 is adjustable along the shaft 6 to vary the position of the plunger, and for lines containing more than two measures, corresponding number of plungers is employed. In a modification, the cam 4 is replaced by a pivoted cam co-operating with a switch-cam to delay the seating of the yoke-lever 17 until the elevator is in its lowest position, and to effect a quick retraction of the plunger.
Patent GB-629904-A (GB)
Title: Improved screening apparatus
IPC: B07B1/46
Filed: 1947-03-03
Abstract: 629,904. Sieves. ROYER FOUNDRY & MACHINE CO.. March 3, 1947, No. 6032. Convention date, Nov. 8, 1946. [Class 117] In screening apparatus such as for' screening and conditioning an agglomerated mass of moulder's sand and of the type which comprises a relatively-moving comb grid 12, 13, and bar grid 15 so mounted and operated with respect to each other as to shift and advance material dumped on the grids from a hopper 11, a material diverting'bar 16 is mounted on and movable with grid element 12 in close relation to the wall 17 of the hopper. As shown, the diverting bar 16 has an inwardly-inclined face, being triangular in cross-section and is mounted on the outermost set of fins 13 extending from an outer element of the comb grid.
Patent GB-1120338-A (GB)
Title: 2-arylamino-4, 6-dichloro-s-triazines
Inventor: KLEINHEIDT ERNST-AUGUST
IPC: A01N43/66
Filed: 1967-02-08
Abstract: 2 - Arylamino - 4,6 - dichloro - s - triazines are prepared by reacting cyanuric chloride with water-soluble salts of arylamines in a molar ratio of substantially 1:1 in an aqueous medium.  The reaction may be carried out in the presence of an organic solvent, e.g. acetone, and/or a wetting agent, e.g. an ethylene oxide-dodecyl alcohol condensate.
Patent GB-1220419-A (GB)
Title: Easy peel food casings
IPC: A22C13/00
Filed: 1969-02-05
Abstract: 1,220,419. Peelable shirred casings. UNION CARBIDE CORP. 5 Feb., 1969 [7 Feb., 1968], No. 6189/69. Heading A2B. [Also in Division B5] Shirred peelable tubular food casings, particularly for sausages, are produced by coating the inner wall with an organosiloxane release agent by a method comprising: inflating a length of the casing with gas and introducing simultaneously an organosiloxane compound, spraying the inner wall of the casing with the organosiloxane compound carried by the gas, and shirring the resulting casing. The organosiloxane is preferably a compound having the formula wherein X is an integer of at least 1 and R is an alkyl, aryl, aralkyl or alkaryl group; or a mixture of two or more such compounds; or a compound having the formula Preferred organosiloxanes are dimethylpolysiloxanes and trimethyl siloxane end blocked methyl hydrogen polysiloxanes. Using conventional apparatus, a length of casing is advanced over a mandrel having a bore through which the inflating gas and metered quantities of the organosiloxane pass, and is then passed through cogged wheels for shirring. The organosiloxane is sprayed as tiny droplets in the gas on to the inner wall, preferably at a rate of 10-30 mg. per 100 square inches of wall, and acts also as a lubricant for the mandrel; further quantities are supplied to lubricate the cogged wheels. An example is given of comparative tests on casings of regenerated cellulose, with known release agents.
Patent GB-1217001-A (GB)
Title: Method of rendering cellulosic textile materials resistant to wet and dry creasing
Inventor: EKSTROM CARL-LENNART
IPC: D06M15/423
Filed: 1968-02-08
Abstract: 1,217,001. Creaseproofing cellulosic materials. MOLNLYCKE AB. 8 Feb., 1968 [15 Feb., 1967], No. 6215/68. Heading D1P. Cellulosic textile materials e.g. of cotton, linen or viscose rayon fabrics, are rendered resistant to wet and dry creasing by impregnating them with an acid bath containing a condensation product of an aldehyde, e.g. formaldehyde or acetaldehyde, and a urea derivative of the formula: in which R is oxygen or sulphur and R1 and R2 are H or together are -CH2CH2-, - CHOH - CHOH-, -CHR3- CHR3- in which R3 is an alkyl radical having 1-4 carbon atoms or an oxyalkyl radical, -CH2- CHR4-CH2- in which R4 is H, OH or an alkyl or oxyalkyl radical, -CH2-NR5-CH2- in which R, is H or an alkyl or oxyalkyl radical, -CH2-O-CH2-, -CHR8-CR9 R10-CH2- in which R8, R9 and R10 are H, OH or alkyl or oxyalkyl radical or the group: or acetoguanamine, dicyandiamide, a dicyandiamidine, a carbamate of the formula R6-NH-COOR7 in which R6 is H optionally substituted by an alkyl or aryl radical and R7 is an alkyl or aryl radical, or melamine, heating them at 100‹-250‹C for 0.5-30 seconds in a fully swelled condition and drying them at a uniform temperature with successive deswelling until the moisture content thereof is 0.1-30% by weight. The textile material may then be finished by rinsing, neutralizing, washing and drying, and in order to render it capable of receiving and retaining setting effects, e.g. pleats, may be soaked in a solution of a proton donating catalyst, dried at a temperature below the setting temperature, subjected to a mechanical treatment preferably under heat and pressure and heated to effect setting. Impregnation may be effected at 10‹-50‹C and the drying in two or more successive steps at 90‹-120‹C so that a uniform temperature is maintained in the textile material. The impregnation bath may contain 10-200g/l of the aldehyde-nitrogen compound condensation product, 0.1-5g/l of a nonionic surface active agent, 5-50g/l of a plastic dispersion, e.g. of an acrylic, methacrylic, vinyl acetate and/or polyvinyl alcohol compound, and a polyethylene emulsion and may be adjusted to a pH of 0.1-7 e.g. with hydrochloric acid.
Patent GB-875959-A (GB)
Title: Improvements in and relating to electric traction equipments
Inventor: COLLINS GORDON
IPC: B60L7/12
Filed: 1957-02-25
Abstract: 875,959. Control of several D.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 4, 1958 [Feb. 25, 1957], No. 6231/57. Class 38 (3). During regenerative operation of compound-wound traction motors A1, A2, a shunt field regulator RD is adjusted automatically to provide a desired braking torque. Should the power supply-lines become non-receptive to the regenerated energy, the armature voltage of the motors will rise rapidly since the series field windings S1, S2 no longer oppose the shunt field windings F1, F2. This rise of voltage is accentuated by the effect of regulator RD which increases the shunt field excitation in an attempt to maintain the predetermined value of regenerated current or otherwise to maintain the desired braking effort. To prevent damage to the motors, a resistor RL is connected across the armature circuit by means of a high-speed contactor having a coil B which is normally de-energized, but, when energized, neutralizes the flux produced by holding winding H. The coil B is connected in series with thyratron T across the armature circuit, a potentiometer P being used for suitably biasing the valve. When the armature voltage rises to a predetermined value as a result of non-receptivity of the supply-lines, the thyratron fires to energize coil B whereby contacts LC1 are closed to connect the resistor RL across armatures A1, A2, and series field windings S1, S2. Sufficient load is thereby afforded to obtain series excitation of the traction motors and so prevent any substantial rise in armature voltage, namely by allowing the passage of sufficient armature current. The high-speed contactor may have further contacts LC2, LC3, LC4 for de-energizing the shunt field contactor KC and the line switches LS1, LS2. After a master controller has been returned to the " off " position, a pushbutton RS, in series with magnet valve coil MC, may be actuated for re-setting the high-speed contactor pneumatically. Specification 817,044 is referred to.
Patent GB-306903-A (GB)
Title: Improvements in seaplane floats and hulls
IPC: B64C35/00
Filed: 1929-02-26
Abstract: 306,903. Rohrbach, A., (Assignee of Rohrbach Metall-Flugzeugbau Ges.). Feb. 27, 1928, [Convention date]. Addition to 269,566, [Class 113 (ii), Ships &c., Kinds &c. of]. Cars and cabins. - In a seaplane hull, the seat legs are transversely and rearwardly inclined for the purpose of providing a better gangway for the passengers. Parcel racks p are provided above the seats. Control wires s and bilge pipes u are led through channels at the top corners.
Patent GB-644645-A (GB)
Title: Improvements in or relating to rail vehicles having axleless trucks
IPC: B61F5/38
Filed: 1948-02-28
Abstract: 644,645. Rail vehicles. FLOWERS, H. F. Feb. 28, 1948, No. 6311. Convention date, Oct. 25, 1944. [Class 103(vi)] A rail - vehicle body 1 is supported by four axleless tandem-wheel trucks 4 through centre pivots 15 whose lower ends are rounded and engage arcuate bearing surfaces 5 to allow pitching of the trucks, each truck comprising an arm 24 connected to that of the opposite truck by a tie rod 25 whereby horizontal turning movements are imparted to the trucks. Movement of the trucks is limited by stops 27, 27<SP>1</SP>, 29, 29<SP>1</SP>, or by a pin at the centre of the tie rod 25 which engages the bogie longitudinal frame members 3. As shown in Fig. 4, each centre pivot 15 is of telescopic construction and houses light and heavy compression springs 20, 22 respectively.
Patent GB-491514-A (GB)
Title: Improvements in and relating to electric rectifiers
IPC: H01J13/48
Filed: 1937-03-03
Abstract: 491,514. Converting. BRITISH THOMSON - HOUSTON CO., Ltd., and WHITAKER, F. P. March 3, 1937, No. 6346. [Class 38 (ii)] A cubicle 1 for a glass-bulb rectifier 2 is provided with a separate compartment 6 for the anode fuses 7. The walls of the compartment are preferably of metal and connected directly or through a protective relay to earth. A cooling fan 4 may be mounted beneath the rectifier.
Patent GB-1425635-A (GB)
Title: Two coordinate display or plotting units
IPC: G01R13/30
Filed: 1973-02-09
Abstract: 1425635 Cathode-ray tube displays SIEMENS AG 9 Feb 1973 [14 March 1972] 6406/73 Heading H4T A frequency-dependent characteristic of a test object is displayed on a cathode-ray tube together with upper and lower tolerance limits. As shown in Fig. 1, the test object 2, comprising, e.g. a band-pass filter is supplied from generator 1 with a constant amplitude adjustable frequency test voltage U m , the voltage derived at the output terminal 2a being supplied via a first adjustable amplifier 14, switch K2 and a second adjustable amplifier 16 to a cathode-ray tube oscilloscope 3 in which it is amplified and rectified and employed to (vertically) deflection modulate a (horizontal) time-base trace produced via a frequency discriminator from the test voltage U m . The latter voltage is also supplied to a pair of adjustable voltage dividers 6, 7 which provide, via respective switches K1 and K3 and amplifier 16, vertical deflection quantities producing upper and lower tolerance limit valves G11, G12, G13 and G21, G22, G23, G24, respectively (Fig. 2) for the trace determined by the output voltage from the test object when the switch K1, K2, K3 are sequentially and cyclically operated. In order to adjust the tolerance limits as a function of frequency a frequency detector 11 preferably comprising a pulse counter, supplies outputs 11a-11n, at frequencies determined by inputs 13, to a control unit 12 which produces control quantities for the voltage dividers 6 and 7. The latter may comprise frequency dependent elements or ohmic elements. Instead of a cathode-ray tube, the display may be produced by other two-coordinate display or recording devices, e.g. an X-Y plotter.
Patent GB-897027-A (GB)
Title: Process control methods and apparatus for improving operating efficiency
IPC: B01J19/00
Filed: 1959-02-24
Abstract: <PICT:0897027/III/1> Chemical processes are controlled by a method and apparatus in which signals (a ) corresponding to mixture analyses and flow rates at selected stages in the process are developed, signals (b ) corresponding to costs of raw materials and values of products are introduced, reaction conditions for maximum profit are automatically computed from said signals and the process is automatically controlled at selected stages thereof in accordance with said conditions.  A number of equations are provided by means of which a suitable computer may be programmed in accordance with the invention, which is described in relation to chemical processes such as catalytic cracking of crude petroleum (in reactor 110) followed by distillation (in tower 140) to provide two products (the numerals relate to Fig. 2).  Feed entering through line f2 is analysed by analyser 210 and passes through transducer 211 associated with flow recorder 213.  The analyser and flow recorder return a -signals to the computer 200, as do flow recorders 223 and 227 mentioned below. The feed stream divides at 101 and the reactant portion passes through transducer 215 and valve 217; a flow recorder controller 219 receives signals from the transducer and computer and produces a signal controlling the valve, and thus the amount of reactant entering the reactor.  The flow rate f2 of catalyst into the reactor is similarly controlled and the products pass through heat exchanger 120 to catalyst separator 130 and then into the fractionating tower, a transducer 221 and flow recorder 223 generating a -signals being provided at this point.  Two fractions are recovered from the fractionating tower and associated apparatus, one of the products also providing data for the computer.  A diagram (Fig. 3, not shown) is provided, illustrating a programme of computing operations including the generation of signals to warn the operator in the event of process or instrument anomalies.