baber/WOPTO huggingface dataset:
Patent GB-668735-A (GB)
Title: Improved method of extracting potassium from dilute solutions
IPC: C01D17/00
Filed: 1949-07-04
Abstract: Potassium is extracted from solutions containing it in small quantities, e.g. sea water, &c., by treating the solution with a solid highly nitrated secondary aromatic amine and a base, e.g. lime or ammonia, precipitating thereby a slightly soluble potassium salt of the amine, separating it and treating with an acid, recovering thereby the amine in solid state for re-use, and a comparatively strong solution of the potassium salt.  Amines specified are dipicryl amine, and various highly nitrated chloro-, methyl-, methoxy-, and ethoxy-diphenyl amines. Specification 605,694 is referred to.ALSO:Potassium is extracted from solutions containing it in small quantities, e.g. sea water &c. by treating the solution with a solid highly nitrated secondary aromatic amine and a base, e.g. lime or ammonia, precipitating thereby a slightly soluble potassium salt of the amine, separating it and treating with an acid, recovering thereby the amine in solid state for reuse, and a comparatively strong solution of the potassium salt.  A pH of 7-8 should be maintained during the aminate precipitation.  The reaction mixture passes to a thickener, and the clear liquor therefrom is treated with acid for the removal of small quantities of dissolved precipitating agent, followed by filtration in sand filters and if desired a charcoal filter, and deacidification with calcium carbonate.  A small quantity of acid is added to the material from the thickener to reduce the pH to about 3, and the fine amine crystals produced and the fine aminate crystals, say, 50 per cent by weight of the total, are returned to the precipitating tank.  The coarse crystals are treated with acid, e.g. nitric acid, and the amine precipitated is finally suspended in say, sea water for reuse.  The bicarbonate content of the sea water may be reduced prior to treatment.  Amines specified are dipicryl amine, and various highly nitrated chloro-, methyl-, methoxy-, and ethoxy-diphenyl amines.  Specification 605,694 is referred to.
Patent GB-942587-A (GB)
Title: A process for the preparation of aminoalkylsiloxane co-polymers
IPC: C08G77/26
Filed: 1961-05-15
Abstract: 942,587. Polyaminoorganopolysiloxanes. DOW CORNING CORPORATION. May 15, 1961 [May 13, 1960], No. 17671/61. Headings C3R and C3T. [Also in Division B2] Polyaminoorganopolysiloxanes are prepared by reacting (1) at least one compound selected from (A) silanes of formula R<SP>11</SP>x(Zn R<SP>1</SP>)Si (OR) 3-x , where x is 0, 1 or 2; each R is an alkyl radical of less than 4 carbon atoms; R<SP>1</SP> is an aliphatic hydrocarbon radical containing 1 or more than 2 carbon atoms and having a valency of n+1 where n is an integer; Z is a monovalent radical attached to R<SP>1</SP> by a carbon nitrogen bond, is composed of carbon, nitrogen and hydrogen, and contains at least 2 amine groups; the ratio of carbon atoms to nitrogen atoms in - R<SP>1</SP>Zn being less than 6:1; and each R<SP>11</SP> is a monovalent hydrocarbon radical free from aliphatic unsaturation, and (B) partial hydrolysates formed by mixing (A) with up to 60% of its theoretical equivalent of water, with (2) at least one organosiloxane of average general formula R<SP>111</SP>y Si(OH) m O 4-m-y , where each 2 R<SP>111</SP> is a monovalent hydrocarbon radical or halogenated monovalent hydrocarbon radical, m has a positive average value not greater than 2, y has an average value from 1 to 2À5, and y+m has an average value not greater than 3, by contacting (1) and (2) in liquid phase in an amount such that there is at least 10% by weight of (1) calculated on the combined weight of (1) and (2). The copolymers may be reacted in liquid phase with an acid to give the corresponding salts. The copolymers are preferably prepared in an organic solvent, and any unreacted -OR groups in the product may be hydrolyzed. Examples are given some of which describe the preparation of compounds (1)(B) and (2). Uses: The polyaminoorganopolysiloxanes and their salts may be used as coating, impregnating and laminating resins, as emulsifying agents for polysiloxane liquids, as modifying agents for alcohol-soluble phenol-formaldehyde laminating varnishes, as curing agents for polysiloxane coating resins and in aqueous solutions or dispersions as sizing agents for glass and fibre textiles. Specifications 671,579, 762,819, 791,370, 872,138, 889,001 and 942,586 are referred to.
Patent GB-370263-A (GB)
Title: Improvements in the treatment of water for boilers and the like
IPC: C02F5/08
Filed: 1931-06-18
Abstract: 370,263. Preventing incrustation. BUCKLE, E. A., 39, Victoria Street, London. June 18, 1931, No. 17689. [Class 123 (i).] A composition for preventing incrustation in boilers comprises a mixture of a soluble alkali compound such as sodium carbonate, a chemical indicator such as phenolphthalein with or without a colloid such as starch.
Patent GB-354910-A (GB)
Title: Improvements in or relating to rudders
IPC: B63H25/38
Filed: 1930-06-07
Abstract: 354,910. Ships' rudders. WAGNER, R., 105, Bismarckstrasse, Hamburg, Germany. June 7, 1930, No. 17737. [Class 114.] In rudders of unsymmetrieal section adapted to utilize the twist of a screw propeller race the rear and front edges are located in the central plane of the ship while the upper and lower halves curve in opposite directions between said edges. The rudder 1 has its leading edge 3 and following edge 4 in the central plane of the ship, and upper and lower sections as III, III<1> are curved as indicated by the curved centre lines 5, 5<1> with the maximum offset at the level of the propeller axis. The rudder is formed by a frame 6, 7, located in the central longitudinal plane and upon which the plating is fixed to give the required profile. Specification 278,357, [Class 114, Ships &c., Propelling &c.], is referred to.
Patent GB-377673-A (GB)
Title: Improvements in or relating to train control systems
IPC: B61L3/12
Filed: 1931-04-22
Abstract: 377,673. Train control and cab signalling apparatus. ASSOCIATED TELEPHONE & TELEGRAPH CO., 1033, West Van Buren Street, and HUDD, A. E., 947, West Van Buren Street, Chicago, U.S.A. April 22, 1931, Nos. 17810 and 17811/32. Divided on 377,702. [Class 105.] In a train control and cab signalling system a manual re-setting device for the restoration of the receiver device which is operated directly from the track to initiate a braking action is rendered ineffective by a speed-controlled device unless the train speed is below a certain limit. Figs. 1 and 2 (17810/32) show a centrifugal valve device mounted on the wheel axle and comprising a chamber 30 with a port 14 closed by a pivoted weight 11 which at a predetermined train speed moves outwards against the action of a spring 9 to open the port 14 and thereby to vent the piping 32, 34 so that depression of a re-setting plunger 13 will be ineffective to set up air pressure for the actuation of a diaphragm by which an armature 33 of a magnetic receiver relay 18 is normally restored. The armature restoration may be effected by a lug on a spindle rocked by the action of the diaphragm. Fig. 10 (17811/32) shows the centrifugal valve device S applied to the control of a valve 107 which remains open after the operation and subsequent immediate restoration of a magnetic receiver relay R by appropriate track magnets. The open valve 107 gives a partial braking and a sustained operation of the horn 104 both of which can be cancelled, if the train speed is below the required limit, by operating the plunger 120 to actuate the diaphragm 105 and so to re-close the valve 107. The valve 107 is opened by the spindle 112 of a main train pipe venting valve 113 which is opened when the magnetic receiver relay R is operated but which is closed when the relay R is restored, as at a caution signal. At a danger signal the relay R is not restored so that the main valve 113 remains open to give a full brake application and due to the large opening of valve 113 the pressure in the piping 114 immediately reaches atmospheric so that the horn 104 is only sounded momentarily. The track magnets comprise permanent and electromagnets arranged as described in Specification 377,702. Specifications 351,039, 351,071, 351,072, and 353,502 are referred to.
Patent GB-788854-A (GB)
Title: Improved bolt means for securing articles against wall and other surfaces
IPC: E21D21/00
Filed: 1954-06-18
Abstract: 788,854. Anchor-bolts. HILL PORTER (NEWCASTLE), Ltd, and TALBOTT, A. C June 23, 1955 [June 18, 1954], No. 17885/54. Class 89(1) An anchor-bolt, e.g. for mine-roofs, comprises a screwed-rod 2, Fig. 1, with a head 2a and a number of eliptical washers 3 spaced apart by sleeves 4. The lowermost washer is supported obliquely by a tube 5 during insertion of the bolt into a bore 1, the tube being turned and the rod pulled to cause an initial biting of the washers into the bore-wall, whereafter the tube is removed and a nut 9 tightened. The tightening may be continued until all the washers lie at right-angles to the rod-axis. In a modification, the head 2a is replaced by a nut and the nut 9 by a cap-nut. In another modification, the washers 10, Fig. 7, are initially bent, and subsequently flattened, by tightening the nut, to bite into the bore-wall. In a further modification, part-spherical washers are used.
Patent GB-706552-A (GB)
Title: Manufacture of acrolein
Inventor: HOWLETT JOHN
Filed: 1950-07-18
Abstract: Acrolein is manufactured by a process which comprises passing a mixture of propylene and molecular oxygen-containing gases at elevated temperatures in the presence of elementary selenium in the reaction zone successively over a contact material comprising copper oxide distributed on activated alumina which has been given a preliminary heat treatment at temperatures above 950 DEG C. and a contact material comprising copper oxide distributed on activated alumina which has been given a preliminary heat treatment between 800 DEG  and 900 DEG C.  The less active and more active contact materials may be arranged in one reactor tube or separately in two reactor tubes in series.  The proportion of olefine employed in the reaction mixture is preferably less than that which corresponds to the lower explosion limit.  Air may be employed for the oxidation or oxygen with inert diluents such as steam or carbon dioxide may be used.  Comparative tests are carried out, one using a uniform contact material and the other using two contact materials in p  accordance with the invention.  In an example, activated alumina granules are impregnated with copper oxide by immersion in aqueous copper nitrate, drying and heating.  One part is heat-treated at 850 DEG C. and the other at 1000 DEG C. and a propylene-air mixture with selenium is passed over the heated contact materials arranged in series with the less active material first.  Specifications 625,330 and 655,210 are referred to.
Patent GB-204402-A (GB)
Title: Improvements relating to pedestals for lavatory basins
IPC: E03C1/32
Filed: 1922-06-29
Abstract: 204,402. Howson, R. G. June 29, 1922. Lavatory basins.-The top of a pedestal A is shaped as shown to receive and support the bottom of an ordinary basin a. A clamping bar f is provided to secure the basin in position.
Patent GB-929263-A (GB)
Title: Improvements relating to charge storage pick-up tubes
Inventor: HOLMES PHILIP LESLIE
IPC: H04N5/228
Filed: 1958-06-05
Abstract: 929,263. Cathode-ray tube circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Sept. 7, 1959 [June 5, 1958], No. 17946/58. Class 40 (7). A non-linear feed-back path is provided between the signal electrode and a beam intensity control electrode of a cathode potential stabilized pick-up tube to reduce the variation in the " restoration potential " (i.e. the lowest potential which the target reaches in equilibrium) which occurs when the light intensity of the object varies. Fig. 2 shows the (non-linear) relationship between the restoration potential V<SP>1</SP>(s) and the potential swing S at the target of the tube and to correct for this an amplifier 9 (Fig. 1) having a suitable non-linear characteristic is connected in a feed-back path, including a fixed gain pre-amplifier 8 and a levelling clamp circuit 10 ... 12, between the signal electrode 2 and the cathode 5 of the pick-up tube 1. The amplifier 9 provides positive feed-back and the gain, which varies from a relatively high-level to a relatively low-level for signals produced by an increasing light intensity, is so offset by the variation in gain of the pick-up tube (which varies directly with light intensity) that the product of the two gains is less than unity for all light levels. Oscillation does not, therefore, occur. The invention, which is applicable to image type tubes and tubes of the photo-conductive type, is stated to produce a substantial reduction in discharge lag without causing either loop or discharge initiability. The non-linear amplifier 9 may employ a cathode-ray tube in which the inputsignal causes the beam to traverse a suitably shaped aperture to produce an output signal having the desired non-linear relationship to the input signal.
Patent GB-357130-A (GB)
Title: Improvements relating to automatic fire-arms
IPC: F41A3/72
Filed: 1930-06-11
Abstract: 357,130. Automatic rifles. KIRALY, P. VON, 12, Kende U, Budapest, and SCHWEIZERISCHE INDUSTRIE - GES., Neuhausen, Schaffhausen, Switzerland. June 11, 1930, No. 17953. Convention date, June 12, 1929. [Class 119.] In an automatic firearm having a sliding barrel and a breech-block locked by being tilted, the slide 8 which effects the tilting is arranged at the side of the breech-block and forms a lateral guide therefor. In the automatic rifle shown, the extension 2, Fig. 1, of the barrel 1 is provided with ribs 4 guided within arms 23, Fig. 7, of a casing 11. The breech-block 5 is guided between the extension 2, a part 20 of the stock and the member 8 which is adapted to slide rearwards independently of the barrel. The slide 8 has projections 9, 10 which engage with inclined surfaces on the breech-block and effect the tilting and the sliding movements thereof. In the locked position, the rear end of the breech-block is tilted upwards by the projection 10 and engages with the end face 3 of an aperture in the barrel extension 2. The casing 11 is slidable longitudinally and is normally locked to the stock 20 by an arm 17, Fig. 9, of a handle 12 pivoted to the casing, which arm is adapted to engage with a projection 22 on the stock. The handle 12 also actuates a pivoted lever comprising an arm 14 which normally engages with a tooth 15 on the stock, and a tooth 24 which is adapted to be moved into engagement with a recess 19 in the breech-block when the handle 12 is moved to retract the casing 11. A projection 18 on one of the arms 23 is adapted to co-operate with a projection on the member 8. Thus, the casing 11, the breech-block 5, and the member 8 may be retracted together to open the breech closure by hand. On firing, a long rearward movement is imparted to the member 8 by a lever 35, Fig. 11, against which strikes a post 34 on the recoiling barrel. A forward extension 39 of the member 8 is engaged by a spring 40 which it compresses on recoiling and which is adapted to return it to its forward position. To prevent accidental unlocking of the casing 20 on firing, the trigger 30 is provided with an upwardly extending arm 31 which, when the trigger is pulled, projects through a recess in the casing and locks the arm 14.
Patent GB-600719-A (GB)
Title: Improvements in or relating to the production of sodium-penicillin
IPC: C07D499/16
Filed: 1944-09-20
Abstract: Crystalline sodium penicillin is prepared by crystallizing a partially purified amorphous sodium penicillin (e.g. the product of Specification 593,691) from an aliphatic alcohol having not more than six carbon atoms in the molecule (e.g. methanol or ethanol), advantageously by precipitation of the crystals from the alcoholic solution by the addition of an alcohol-miscible organic non-solvent for sodium penicillin (e.g. ethyl acetate or acetone). The product may be used for the preparation, in substantially pure form, of penicillin salts of other metals, such as the calcium salt (e.g. by acidifying an aqueous solution of the sodium salt, extracting with ether and re-extracting with an aqueous solution of calcium hydroxide or an aqueous suspension of calcium carbonate), of free acid penicillin (e.g. by acidifying an aqueous solution of the sodium salt with dilute phosphoric acid, extracting with ether, drying the extract and evaporating in vacuo) or of penicillin esters (e.g. by treating the foregoing dried ethereal extract with a diazoalkane, e.g. diazomethane).
Patent GB-384590-A (GB)
Title: Improvements in or relating to valve mechanism of internal combustion engines
IPC: F01L5/04
Filed: 1932-06-27
Abstract: 384,590. Valves. McMILLAN, J. A. and HOLMES, R. W., 181, Botsford Street, Moncton, New Brunswick, Canada. June 27, 1932, No. 18115. [Class 7 (vi).] In a four-stroke multicylinder engine in which each pair of cylinders is provided with a pair of piston valves 18, 19, the former controlling the inlet to both cylinders, and the latter the exhaust from both, the valves reciprocate within ported liners 24. Each valve is provided with two ports 26 at different levels, one for each cylinder.
Patent GB-1244474-A (GB)
Title: Printing cam
IPC: B41J1/26
Filed: 1970-04-16
Abstract: 1,244,474. Selective printing. CREED & CO. Ltd. 16 April, 1970 [24 April, 1969], No. 18195/70. Heading B6F. In a printer of the kind having a continuously rotating set of type-levers on a basket, the selected lever 2 to effect impression is guided up to impact position by a cam such that it counters the normal tendency of the lever to bend sideways in the direction of rotation so that the outer end 2a of the lever hits the platen 7 in an unbent attitude.
Patent GB-140477-A (GB)
Title: Improvements in and connected with lamp and gas shades and reflectors and the like
IPC: F21V7/10
Filed: 1916-12-22
Abstract: 140,477. Willetts, G. F. Dec. 22, 1916. Shades; reflectors.-Cardboard or like lamp or gas shades or reflectors &c. are secured in shape by overlapping the edges 1 and stitching the edges together as at 2. To prevent the stitches from becoming undone, the stitching may be reversed in direction at either end, or, as shown, at both ends; or it may be continued to overlap at the end of the seams.
Patent GB-1442593-A (GB)
Title: Filter material
IPC: D04H13/00
Filed: 1972-04-20
Abstract: 1442593 Tobacco smoke filter BRITISH ROPES Ltd 25 June 1973 [20 April 1972] 18457/72 Heading A2C [Also in Divisions B4 and B5] A cigarette filter comprises a fibrillated polyolefin film. The polyolefin film has a thickness of 5Á to 25Á and has a substantial number of free ends formed by severing the interconnecting strands of the fibrillated film.
Patent GB-418691-A (GB)
Title: Improvements relating to the packing of tea and other like materials
IPC: B65B1/24
Filed: 1933-06-29
Abstract: 418,691. Packeting tea &c. PHILLIPS ENGINEERING CO., Ltd., and BROOKE, N., Evelyn Road, Sparkhill, Birmingham. June 29, 1933, No. 18499. [Class 94 (i).] Packets of tea or other material are subjected before closing to a lateral squeeze first at one pair of opposite edges and then at the other pair of opposite edges, the packets being shaken after each squeezing operation. A number of packet platforms s and squeezing plates e are mounted at intervals on a conveyer comprising upper and lower pairs of chains a, b joined by vertical bars c on which the arms d of the plates e are pivoted. Between adjacent rods c one pair of upper and lower chains carry a pair of rods p supporting a bracket q in which the stem r of the platform s slides, a rack on the stern meshing with a toothed quadrant t controlled by a roller u engaging a track bar v. The rods p also carry arms w for holding a packet on the platform, the movement of the arms being controlled by the engagement of rollers with track bars y, 4. The squeezing plates e operate in pairs and are controlled by the engagement of rollers on their arms d with track bars f, f<1>. The packet first rests freely on the platform s in its lowest position. As the squeezing position is approached, the platform is raised under the action of the bar v and immediately afterwards the arms w close momentarily to centralize the packet on the platform. The cams 7 on the bars f then cause one pair of plates e to apply a squeeze to one pair of opposite edges of the packet, after which the platform drops and applies a jolt. The second squeezing operation takes place in a similar manner, the cams 9 on the bars f<1> causing the other pair of plates e to operate on the other pair of opposite edges of the packet. The mechanism may be suitably co-ordinated with bag-making and filling mechanism.
Patent GB-1389786-A (GB)
Title: Device for classifying components particularly midget components
IPC: B07C5/36
Filed: 1973-04-17
Abstract: 1389786 Shoots P A SHEVINOV 17 April 1973 18534/73 Heading B8S A device for classifying components delivered to a testing unit 1, in accordance with a measured parameter thereof, comprises a shoot 12 movable in response to a signal corresponding to the parameter measured, to deliver the component once discharged from the unit 1 into a stationary shoot 3, to one of a plurality of receiving cups 17. The shoot 12 is coupled to the shoot 3 by a coil spring 15, the top of the shoot 12 including a circular collar 13 received in a groove 10 in a probe 9 fastened to the lower end of the shoot 3. Radial slots 11 in the probe house lever arms 14, which under the action of electro-magnets 5, are pivoted to tilt the shoot 12 into a required position, the particular electro-magnets 5 operated being controlled by the signal from the testing unit 1.
Patent GB-217075-A (GB)
Title: Improvements in machines for straining paper-pulp
IPC: D21D5/02
Filed: 1923-07-18
Abstract: 217,075. Watford Engineering Works, Ltd., and Paramor, J. July 18, 1923. Non-rotary straining machines with jigging or pulsating elements.-A flat or trough-shaped strainer a is suspended by straps c which embrace eccentrics d on a rotating shaft e so that all portions of the straining surface receive a uniform vibratory motion. The flow may be in either direction through the strainer. The strainer shown is arranged for inward flow and provided with a flexible, and readily disconnected, outlet pipe g. For cleansing the strainer can be turned about the eccentrics as pivots to the upper position indicated in Fig. 2. The strainer vat is provided with an overflow notch and sluice for the discharge of scum.
Patent GB-228849-A (GB)
Title: Improvements in or relating to insecticides
IPC: C07D213/16
Filed: 1924-08-05
Abstract: An insecticide, which consists of a mixture of isomeric dipyridyls, is prepared by heating sodium with an excess of pyridine, then passing dry oxygen or air through the cooled product until the colour turns brown, and finally removing the excess of pyridine by distillation.