baber/WOPTO huggingface dataset:
Patent GB-240401-A (GB)
Title: A process for the production of lead compounds from ores, metallurgical products, waste-products from chemical processes and the like
IPC: C01G21/00
Filed: 1924-11-11
Abstract: Lead ores, slags, sludges &c. are rendered acid with hydrochloric acid if necessary, and treated with a strong solution of an alkali or alkaline earth chloride to obtain a solution of the lead.  The solution is purified from iron by oxidation for instance with air, chlorates, chlorine or bromine and silver &c. is then precipitated by means of metallic lead.  An alkali or alkaline earth oxide or hydroxide or an alkali carbonate is then added to precipitate a lead oxychloride, a small quantity of lead being preferably left in the mother-liquor, which is used again. The oxychloride is suspended in water and treated with the necessary acid such as hydrochloric, sulphuric, chromic or carbonic acid to obtain the desired lead salt. When lead carbonate is required, the suspension is treated with carbon dioxide until chlorine ceases to increase in the solution. When the precipitate is more or less separated from the solution, water is added, and carbon dioxide is again introduced, these operations being repeated if desired until the precipitate contains about 0.5 per cent of chlorine.  A small quantity of a base such as lime is then added and carbon dioxide is again introduced, when a further reduction in the chlorine content of the precipitate is effected.  The carbonate is usually basic, and may be used as a pigment.  Examples describe the treatment of lead slimes with hydrochloric acid and calcium chloride, the solution being purified with potassium chlorate and calcium carbonate and then with granulated lead, and the oxychloride being precipitated with lime and converted into chloride by hydrochloric acid or into sulphate by sulphuric acid; the treatment of lead chamber sludge with saturated sodium chloride solution containing calcium chloride to remove the sulphate radical, the solution being purified and treated to obtain oxychloride as above, and the oxychloride being converted into chromate by potassium chromate and hydrochloric acid; and the treatment of lead oxide slimes containing zinc by first leaching with dilute hydrochloric acid to remove the zinc, and then treating as above described to obtain the carbonate.  Specifications 22615/10 and 222,821 are referred to.
Patent GB-1294508-A (GB)
Title: Improvements in or relating to sewing machines
IPC: D05B51/00
Filed: 1970-06-04
Abstract: 1294508 Sewing machines HUSQVARNA VAPENFABRIKS AB 4 June 1970 [9 June. 1969] 26946/70 Heading D1G A sewing machine comprises means for emitting a signal when the thread remaining on the bobbin has been exhausted to a particular point and is characterised in that the indicating device on the bobbin actuates a signalling device on the machine. As shown a contact lever 13 for sensing the diameter of thread on the bobbin is pivotally mounted on the cranked end of a spring 10 which tensions the bobbin thread emerging from a hole 8 in the casing. A spring 14 urgesthe lever against the coils of thread on the bobbin. When the thread is reduced to a certain point the end 18 of the lever 13 strikes abutments 19 on the loop taker 1 as there is relative motion between the. two. This contact emits a high frequency audible rattle. Alternatively a microswitch 21 may be provided which will either actuate a signal lamp or stop the the machine drive. To remove the exhausted bobbin a lever 6 is moved to the right to release a catch 4 from an annular slot in the bobbin support shaft. An arm 16 depending from the arm 6 contacts the lever 13 and moves it it away to allow removal of the spool.
Patent GB-1026012-A (GB)
Title: Improvements in or relating to frequency meters,speed indicators and like impulse rate indicators
Inventor: DEATH PHILIP JOHN
IPC: G01P3/48
Filed: 1961-07-26
Abstract: 1,026,012. Frequency detectors. RECORD ELECTRICAL CO. Ltd. Oct. 15, 1962 [July 26, 1961], No. 27034/61. Heading H3A. A ring rectifier bridge is connected in series with a capacitor and a transistor switch, rendered conductive by a rectangular waveform formed by limiting the A.C. input whose frequency is to be measured. Charging and discharging current to and from the capacitor passes through a meter in the other bridge diagonal, in each case in the same direction. A resistor shunting both the bridge and capacitor passes the discharge current. A Zener diode stabilizes the operating voltage.
Patent GB-902783-A (GB)
Title: Pressure vessel closure and seal
IPC: F16J13/12
Filed: 1960-08-04
Abstract: 902,783. Closures for resisting fluid pressure. GRAY TOOL CO. Aug. 4, 1960 [May 3, 1960], No. 27083/60. Class 123 (1). A removable closure for effecting a fluidtight seal in the opening 12 of a high pressure vessel 10, e.g. in oil well or chemical processing equipment, comprises a sealing member 14 consisting of a cylindrical portion 28 and a flange 30 with a flexible peripheral sealing lip 16, and an externally - threaded plug 18 having a central bore 38 to slidingly receive the cylindrical portion 28 of the sealing member 14. To effect a seal the member 14 is introduced into the opening 12 so that an inwardly-tapering sealing surface 24 provided in the opening 12 is engaged by the lip 16 which, in its undistorted state, taperes inwardly to a less extent than the surface 24. The plug 18 is screwed into the opening 12, e.g. by engaging lugs 42 with a bar, until its lower surface 40 engages a shoulder 26 terminating an undercut portion 22 at the end of a threaded portion 20 of the opening 12 at which position the member 14 has been urged downwardly for the lip 16 to be distorted into complete engagement with the sealing surface 24. The sealing surface 24 and the corresponding surface 32 of the lip 16 are formed of non- scoring material, and the plug 18 may be secured to the vessel 10 by means of a bolted flange, a bayonet-type joint, or only other similar conventional connecting means. In a modification, the sealing surface 24 is in the form of a flexible lip the corresponding engaging surface of the sealing member being made rigid. In a further modification the sealing lip 16 is formed on a unitary plug member screwable into the opening 12.
Patent GB-247291-A (GB)
Title: Improvements relating to the seats of perambulators and the like
IPC: B62B9/12
Filed: 1924-11-13
Abstract: 247,291. Morriss, E. T., and Marmet Baby Carriage Syndicate, LTd. Nov. 13,1924. Spring mountings and supports for seats. - The seat b of a perambulator &c. is supported in the body c upon indiarubber blocks a, which are connected to the seat by studs a' formed integrally with the blocks a and inserted through holes in the seat. The blocks rest upon a ledge c' secured inside the body and may be secured to the ledge instead of to the seat. The blocks may be composed of spongy rubber covered with solid rubber.
Patent GB-1195168-A (GB)
Title: Tensioning Device for Bottom Belts of Drawing Mechanisms for Spinning Machines.
IPC: D01H5/26
Filed: 1968-06-07
Abstract: 1,195,168. Spinning machines. SPINDEL FABRIK SUSSEN, SCHURR, STAHLECKER & GRILL, G.m.b.H. 7 June, 1968 [20 July, 1967], No. 27170/68. Heading D1D. A tensioning device for the bottom belt 4 of a drawing mechanism comprises a bar 6a bearing against the belt and mounted on the guide rail 3 by resilient arms 6b. The bar is urged against the (belt by a leaf spring 7, a coil spring mounted on the arms and pressed against the rail, or a coil spring between the rail and a central arm. The device is made of plastics or sheet metal, and has lugs 6d to prevent the belt slipping.
Patent GB-995918-A (GB)
Title: Improvements in carrying handles
Inventor: NORMAN THOMAS EDWARD
IPC: A45C13/26
Filed: 1962-07-16
Abstract: 995,918. Handles for collapsible containers. THOS. NORMAN & SON (FALCON) Ltd. May 14, 1963 [July 16, 1962], No. 27174/62. Heading A4G. A flexible plastics strip 1 is stapled at its ends to a cardboard strip 3 and is passed from the inside through a slot 4b in one closure flap 4a and through a similar slot in another flap folded over the first so that opposite ledge recesses 1b at the ends of the strip 1 engage opposite sides of the slot.
Patent GB-1068887-A (GB)
Title: Carbanilides
IPC: C07C273/18
Filed: 1964-07-01
Abstract: The invention comprises (i) carbanilides of the general formula <FORM:1068887/C2/1> wherein each X is Cl, Br or NO2 and each R is H, Cl, Br, NO2 or a C1-C5 alkyl radical; and (ii) complexes of compounds of the formulae <FORM:1068887/C2/2> wherein X1 is Cl or Br and n is 0 or 1 and <FORM:1068887/C2/3> wherein X1 is Cl or Br with 2-hydroxy-4,6-dimethylpyrimidin and dimethyl formamide respectively. The carbanilides are prepared by reacting a substituted diphenyl ether amine with a substituted phenyl isocyanate or by reacting a substituted diphenyl ether isocyanate with a substituted phenyl amine.  The complexes are prepared by mixing equimolar proportions of the carbanilide and 2-hydroxy-4,6-dimethyl-pyrimidine or dimethylformamide in methanol or ethanol.  The carbanilides and their complexes are used in poultry feed supplements.  Pharmaceutically active compositions.-The above carbanilides and their complexes are used in poultry feed supplements comprising an edible inert carrier and 1% to 40% by weight of the above compounds to combat coccidiosis. Edible carriers mentioned are distillers' dried grains, corn meal, citrus meal, fermentation residues, ground oyster shells, attapulgus clay, wheat shorts, molasses solubles, corn cob meal, edible vegetable substances, toasted dehulled soya flour, soybean mill feed, antibiotic mycelia, soya grits and crushed limestone.
Patent GB-783226-A (GB)
Title: Improvements relating to malting apparatus
Filed: 1955-09-23
Abstract: 783,226. Malting. MEYER MALT & GRAIN CORPORATION, G. J. Sept. 23, 1955 [March 2, 1955], No. 27191/55. Class 14 (2). Apparatus for malting grain comprises a tower 21, a centrally-disposed flue 71, steeping tanks 95, 96 and germinating chambers 110, 111 ... 115 spaced about the flue, drying bins 30, 31 under the germinating chambers, and one or a number of furnaces 26 so arranged that heated gas from the furnace 5 is conducted through the drying lines to the flue. Atmospheric air drawn in through louvres 140 is passed into ducts 145, which house a refrigerating unit 142, a heater 143 and water sprayers 144, and is passed by ducts 150 and vertical ducts 151 through louvres 155 across grain compartments 24 in the germinating chambers, is then passed by way of louvres 156 into an annular tube 72 round the flue 71, is extracted therefrom by a fan 165 and is returned through pipes 173 into the ducts 145. The circulation of air through the germinating chambers may be reversed by operation of flap valves 147. Heat transfer from the flue 71 to the circulating air may be increased by the provision of arcuate metal plates in the column 72. Grain elevated to an entry point A is fed to the steeping tanks 95 by screw conveyers in the troughs 88 and is fed subsequently to the other steeping tanks 96. After steeping, the grain is allowed to fall by gravity through pipes 102 to warms 104, which deliver the grain into the compartments 24 in the uppermost germinating chamber 110. After a prescribed time the grain is discharged by finned rollers 125 into the next lower germinating chamber 111, and so on until germination is completed. The grain then falls successively into the two series of drying bins 30, 31 and is finally discharged to storage hoppers 45.
Patent GB-1046100-A (GB)
Title: Process for preparing biodegradable detergent alkylate
IPC: C07C15/107
Filed: 1964-07-01
Abstract: Detergent alkylate is obtained by contacting an aromatic hydrocarbon with a n-paraffin feed obtained by a molecular sieve process and boiling in the range 300-600 DEG  F. and straightchain monochloroparaffins obtained as indicated below in the presence of a Friedel-Crafts catalyst, separating from the product alkylate and n-paraffins and converting 10-50% of the latter to monochloroparaffins by reaction with chlorine to obtain the monochloroparaffin feed to the alkylation.  The feed may contain 2-15 mols. of aromatic hydrocarbon, 2-10 mols. of fresh n-paraffin feed and 0.05-0.5 mol. of aluminium chloride per mol. of chlorinated paraffin, reaction being effected at 100-185 DEG  F. for 10-30 minutes or using a two-stage process with red oil complex catalyst as described in Specification 1,046,099. Separation of the product is effected by distillation or by selective sulphonation of the alkylate followed by solvent extraction.
Patent GB-1318412-A (GB)
Title: Manhole cover frame
IPC: E03F/
Filed: 1970-06-05
Abstract: 1318412 Manhole cover frames M PANCOL and A VANDENESCH 5 June 1970 [20 June 1969] 27267/70 Heading E1G An adjustable-height frame 1 shown set in road surfacing 6 to support a manhole cover (not shown) of square, circular or other shape, has a depending peripheral flange of trapezium cross-section which has at least its outer wall 1e sloping and which rests on a bed 2 of sand or the like spread in a fixed trough 3 of similar trapezium cross-section, the frame height being adjusted by varying the depth of sand. The sand trough 3 may be a separate unit, Fig. 2 (not shown), but as shown is formed around the head unit of the manhole shaft 4 and has drainage channels 7, while the depending flange of the frame comprises an open-bottomed groove filled with concrete 1h. In modifications the depending flange is either hollow (Figs. 4, 5 not shown) or opentopped and concrete-filled (Figs. 1, 2 not shown).
Patent GB-228258-A (GB)
Title: Improvements in brake systems for road vehicles
IPC: B60T8/24
Filed: 1923-10-31
Abstract: 228,258. Royce, F. H. Oct. 31, 1923. Brakes, arrangement and disposition of, and braking.-In a four-wheel braking system in which an equalizing device is provided between the front and the rear brakes, the steering mechanism is arranged to act upon the brake-operating gear in such a manner that when the front wheels are steered the application of the front wheel brakes is prevented or they are released if already applied. The brake pedal a<3>, Fig. 1, is connected to an epicyclic equalizing device b from which the front and rear brakes are operated through rods or cables b<5>. b<3> and other equalizing devices c<1>, c<2>. The front brake rod b<5> is connected to a ratchet disc d and by a rod b<55> to the equalizer c<1>. A pawl d<5>, Fig. 3, carried by an arm d' loosely mounted on the disc shaft is normally held clear of the ratchet disc by a fixed lug d<33>, but when the steering gear e is operated in either direction a two-peak cam e<2> rotates a lever e<5> and moves the pawl to clear the stop and engage the disc, after which the disc is rotated backwards to release the front brakes if they have been applied, or to prevent their application afterwards. In a modification, the ratchet disc is dispensed with and the arm d<4> .carries a stop which engages an arm connected to the brake rods b<5>, b<55> and so acts on the front brakes. In another modification the connection between the brake rod b<5> and the cam e<2> comprises two pistons working in hydraulic cylinders. Normally, the piston connected to the brake rod is unimpeded, but when the steering gear is operated the other piston is lowered and forces the first one back until the brakes are released. In the modification shown in Figs. 11 and 12, the brake pedal acts through a servomotor on a piston in a cylinder k connected normally by ports in a piston valve k<12> with two cylinders k<7> each operating one of the front wheel brakes. When the steering gear is operated, the cam e<2> moves the piston valve to the left to close the communication between the pressure side of the piston k' and the brake cylinders and to open a bye-pass k<17> between the cylinders and the reservoir space above the piston, so freeing the brake cylinders of pressure and allowing the front brakes to come off. Specification 225,031, [Class 103 (i), Brakes &c.], is referred to
Patent GB-1434931-A (GB)
Title: Passenger restraint devices for passenger vehicles
IPC: B60N2/427
Filed: 1972-06-13
Abstract: 1434931 Safety vehicle seats BRITISH LEYLAND MOTOR CORP Ltd 31 May 1973 [13 June 1972] 27506/72 Heading A4J The backrest 9, 10 of a safety vehicle seat particularly for buses comprises a sheet of metal 28, e.g. embossed aluminium, which buckles and so absorbs energy when struck from the rear by the knees of a passenger and an upper cross-bar 27 which crumples to cushion the impact of the shoulder and neck of the passenger.
Patent GB-1275046-A (GB)
Title: Obtaining information concerning the atmosphere
Inventor: TOWNSEND ALBERT ALAN
IPC: G01N21/45
Filed: 1968-06-10
Abstract: 1275046 Photo-electric monitoring BRITISH AIRCRAFT CORP Ltd 14 Aug 1969 [10 June 1968] 27517/68 Heading G1A [Also in Division H4] In apparatus for detecting an inhomogeneity in the atmosphere e.g. clear air turbulence, laterally spaced optical means direct light from a star on to one more photo-sensitive devices and the lateral spacing of the optical means is varied and the output of the photo-sensitive devices used to detect said inhomogeneity. In a first embodiment the size of the elements of the pattern are determined by adding the outputs of two photomultipliers each receiving light from the star focused by a lens. The photo-multipliers are moved apart until the adder output starts to decrease, thus giving the size of the element from which can be determined the range of the inhomogeneity. In a second embodiment Fig. 2 (not shown) there is only one photo-multiplier placed at the focus of a telescope mirror and the light from the star is viewed through either two relatively movable apertures in a mask, or through gratings having different spacings. The velocity of the inhomogeneity is determined from the frequency of variations in the output of the photomultiplier or adder.
Patent GB-753138-A (GB)
Title: Process for the extraction of sapogenins from plant materials
IPC: A61K36/484
Filed: 1953-10-07
Abstract: Sapogenins are extracted from saponinbearing plant material by subjecting it to the action of aqueous non-oxidizing acid to effect hydrolysis of the saponins, separating the acid solution from the water-insoluble material, which includes the sapogenin formed and fibrous material, and extracting the water-insoluble material with a solvent for the sapogenin, preferably after neutralization with a metal base.  Advantageously the plant material is first comminuted and dried (in some cases after extraction with a fat solvent which is a non-solvent for the saponin, to remove fats and waxes), the acid treatment is effected at a temperature of at least 75 DEG  C. (e.g. above 100 DEG  C. under superatmospheric pressure), and the extraction of the sapogenin is effected with a heated (e.g. refluxing) organic solvent therefor (which is preferably water-immiscible and may in this case be subsequently expelled from the extract by steam distillation).  Suitable acids are those with a dissociation constant of at least 10-3 (preferably as high as 10-2), e.g. toluene-, methane- and ethane-sulphonic acids, chlorosulphonic, sulphuric, hydrochloric, hydrobromic, phosphoric, sulphurous and phosphorous acids, mono-, diand tri-chloroacetic acids, bromoacetic, trifluoroacetic, oxalic, maleic, o-nitrobenzoic and thiosulphuric acids, or also acid reacting reagents such as aluminium chloride, zinc bromide, phosphoric anhydride and sulphur trioxide, whilst neutralization may be effected with such bases as sodium or potassium hydroxide, barium oxide, calcium oxide or hydroxide, or soda lime. Preferred solvents are hexane, ligroin, heptane, octane, gasoline, kerosene, benzene, naphtha, toluene, xylene, chloroform, ethylene chloride, methylene chloride, ethyl bromide, tri- and tetra-chloroethylene, ethyl, isopropyl and butyl ethers, diethyl, methyl isopropyl and methyl isobutyl ketones, ethyl, isopropyl and butyl acetates, n-butanol and amyl alcohol, but water-miscible solvents such as methyl, ethyl or isobutyl alcohol or acetone may also be used. The process may be combined with that of Specification 753,137. Examples describe the extraction of: (1) diosgenin (and its acetate by acetylation) from dioscorea roots; (2) hecogenin (and its acetate) from Mexican sisal leaves and stalks; (3) sarsa-sapogenin (and its acetate) from yucca leaves; (4) dianhydrogitoxigenin from oleander leaves; (5) glycyrrhetic acid from licquorice roots; (6) oleanolic acid (and its acetate) from guaiac bark; (7) monoanhydroconvallatoxigenin (isolated as its benzoate by treatment with benzoyl chloride and pyridine) from lily of the valley leaves and flowers.
Patent GB-720582-A (GB)
Title: Apparatus for the continuous casting of molten metal
IPC: B22D11/06
Filed: 1952-11-03
Abstract: 720,582. Continuous casting-machines. PROPERZI, I. Nov. 3, 1952 [Nov. 8, 1951], No. 27649/52. Class 83 (1). Apparatus for the continuous casting of molten metal to produce, e.g. bar, rod or wire, comprises a casting drum 1, Fig. 1, rotatable on a shaft 2 and with a casting groove 7, Fig. 2, in its periphery, a wheel 9 rotatably supported by an arm 11, an endless band 8 looped over the drum and wheel to cover a part of the groove 7, and a crucible 13a for the molten metal with a spout 16 leading into the groove. The crucible is arranged laterally of the drum and is mounted on arms 22 pivoted about a rod 23 carried by a frame 39 which is turnable about the shaft 2. Pivoting of the arms 22 is controlled by means 24 and turning of the frame 39 is controlled by a hand wheel 19 driving a pinion 20 engaging a quadrant 21 on the frame. The arms 22 and crucible are adjustable laterally of the drum by a screwed rod 25. The arm 11 is also adjustable about the shaft 2 by a hand wheel 27 driving a screwed rod attached to a part 41 of the arm. Molten metal is supplied to the crucible by a shoot 29 and is heated by gas supplied through connections 17 and burnt in the outer space 15 of the crucible. The burnt gas leaves the space by outlet 18 and surrounds spout 16 to prevent oxidation of the metal. In another embodiment, the gas is burnt on the surface of the metal in the crucible which is supplied with a cover. In yet another arrangement the crucible is additionally adjustable by being pivoted to the arms 22 and having adjustable screw stops. Reference has been directed by the Comptroller to Specification 673,801.
Patent GB-267181-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M7/08
Filed: 1925-11-03
Abstract: 267,181. Standard Telephones & Cables, Ltd., (Turkhud, B. A., and Fremery, F. de). Nov. 3, 1925. Automatic and semi-automatic exchange systems.- In phantom circuit systems such as that described in Specification 261,103, a single impulse circuit is provided for a number of speaking circuits. As shown, the four pairs L1 - - L4 provide six talking channels terminating in trunk circuits such as that shown in Fig. 2. The seventh channel or " ghost circuit " is connected at one end to an impulse transmitter D and at the other to a thermionic valve controlling a repeating relay F. The impulse circuit is associated with a particular channel by sending a preliminary impulse of ring- ing current over the channel whereupon relay A pulls up, locks itself and causes energization of relays B, C, C<1>, D, D', L. Relay D<1> cuts off relays A, B, and relay L connects the incoming end of the ghost circuit to the grid of the repeating valve. Relay C lights the valve filament whereupon relays F, F<1>, G, N pull up. When the dial is operated the loop, over which the grid is normally grounded, is cut and battery is connected to the grid via the upper half of the ghost circuit for each impulse. Relay F repeats the impulses to the switches. Relay G which is slow to operate falls back at the beginning and pulls up again at the end of each train and with relay N builds up the counting chain. When the full number of digits has been sent, relay Scr 6 energizes relay H which locks up and energizes relay J which releases relays C, C<1>, D, D<1>, L &c. The connection is released by sending a further impulse of ringing current over the talking circuit.