baber/WOPTO huggingface dataset:
Patent GB-379758-A (GB)
Title: Improvements in or relating to radio receivers
IPC: H03G3/22
Filed: 1931-06-05
Abstract: 379,758. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London, KEMP, C. G. and KEMP, L. G., 92, Upper Cedar Road, Southampton. June 5, 1931, No. 16513. [Class 40 (v).] In a superheterodyne receiver for use as a ship-to-shore telephone receiver, variations in signal strength due to fading and like causes are eliminated by providing, in parallel with the signal detector, an additional thermionic detector, the output from which is utilized to control the amplification of the receiver in dependence on received intensity. Fig. 2 shows a push-pull signal detector SD1, SD2 in parallel with which is connected the input to a push-pull gain control detector CD1, CD2 having means for variable bias and supplying two cascade-connected d.c. amplifiers DC1, DC2 through a smoothing circuit SC. The bias. of DG1 is variable by a potentiometer P and the output circuit of DC2 comprises a resistance R3 which varies the grid bias of the high frequency or intermediate frequency amplifiers, preferably the former. The local oscillator V1, Fig. 1, is coupled to the frequencychanging valves V2, V3 in an aperiodic manner through resistance R1 so that potential on the grids of V2, V3 due to the heterodyne is practically constant over a range of frequencies. The output from V2, V3 is passed to an intermediate frequency amplifier arranged as a bandpass filter, the band width being sufficient to include both side bands.
Patent GB-563634-A (GB)
Title: Improvements in or relating to tanks or vats for treating materials with dyeing and other liquids
IPC: D06B5/20
Filed: 1942-11-23
Abstract: <PICT:0563634/IV/1> A tank or vat for treating hanks of yarn, hosiery or fabrics in continuous lengths with dyeing and other liquids has a bottom of uniformly rounded form and a tube or tunnel 5 in the rounded formation which provides for circulation of the liquid and accommodates a propeller 6 for this purpose.  The sides of the tank are flared at 1b and, above the flare, vertical.  They are formed with flanges for suspension from supporting members 3. The tube 5 is perforated, and the propeller may be driven in either direction.  A partition provides a channel for the vertical flow of the liquid.
Patent GB-123696-A (GB)
Title: Improvements in or relating to Apparatus for Constructing Concrete Floors.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: E04G11/46
Filed: 1918-10-11
Abstract: 123,696. Jackson, W. J. Mellersh-., (Uni-form Co.). Oct. 11, 1918. Casting in situ.-Dome-shaped moulds for concrete floors are made of sheet metal and carried on two opposite edges by channel bearers 1, Figs. 2, 3, and 17, to form spaces for the main concrete beams, the other edges 7 being flanged so that adjacent moulds 3 may be bolted together, Fig. 3, or overlapped, Fig. 17, to form spaces for the transverse concrete joists. Clamps 12 and bolts 13 secure the moulds in the channel bearers. In the modification shown in Figs. 4 and 5, the moulds are adjustably spaced on the bearers 19 by a filler piece 27 forming also a clamp, and are provided laterally with bolts in tubes 29 and filler pieces 31. Spacing or gauging the moulds may be effected by a swivelling spring 33, Fig. 7, or a set-screw 35, Fig. 10, or by cruciform flat plates at the junctions.
Patent GB-260912-A (GB)
Title: Improved railway signalling device
IPC: B61L3/04
Filed: 1926-07-05
Abstract: 260,912. Biasizzo, V., and M³ller, J. July 5, 1926. Track apparatus actuating signals on trains.- A casing d closed at its lower end by a plate e to which one end of a spring f is fastened, is mounted on the locomotive, the upper end of the spring being fastened to a disc slidable in the casing and guided by pins h moving in slots in the casing. Normally, the disc is held raised, with the spring f under tension, by a pivoted detent k engaging the pins h under the action of spring n. The lower end of a pivoted lever o is adapted to strike a pivoted abutment z on the track, the abutment being raised under danger conditions. The uper end of lever o has pin-and-slot connection with the detent k, so that when lewer o strikes abutment z the detent is rocked to release the disc which is thereupon moved downwards by the spring f. Secured to the disc are two cords t, u, the former serving to operate a valve x and give an audible warning, and the latter passing over a pulley v into the cab so that by pulling the cord u the disc raised to reset the device.
Patent GB-484437-A (GB)
Title: A process for the production of alcohols
IPC: C07C29/06
Filed: 1937-06-17
Abstract: Alcohols are obtained by hydrolyzing the absorbed olefine content of an acid liquor containing free sulphuric acid by heating it with water at temperatures of 40-75 DEG  C. in a substantially closed system, maintaining acid concentrations of 50-90 per cent, on a hydrocarbon-free basis, and avoiding distillation and maintaining a pressure greater than the partial pressure of the absorbed olefine content in the hydrolyzing unit during hydrolysis.  Olefines and mixtures containing them from various sources may be used, particularly secondary olefines, and include ethylene, propylene, butene-1, butene-2, pentene-1 or, pentene-2, isopropyl-ethylene and higher homologues.  Tertiary olefines such as isobutylene, trimethylethylene, unsym. methyl-ethyl-ethylene may be present, and may be absorbed simultaneously with the other olefines, or may be selectively absorbed, for example in a secondary olefine absorption product, to give both secondary and tertiary alcohols.  Alternatively the tertiary olefine content may be removed completely by absorption, polymerization or other suitable method.  The process may be carried out in various ways (1) by dilution of the absorption product with water and heating the mixture in a closed system, (2) by carrying out the hydrolysis under pressure with agitation only until the polyalkyl sulphate content has been substantially reduced, and then maintaining the mixture under the same or other suitable pressure until hydrolysis of the alkyl sulphuric acid ester has been effected.  The agitation is preferably effected by bubbling olefine gas under pressure through the liquor, (3) the poly-alkyl ester conversion may be carried out at a higher acid concentration, the liquor being diluted for the conversion of the alkyl acid esters.  Either acid or water may be added for the first hydrolysis step, (4) with ethyl and/or propyl esters, the conversion of the dialkyl esters is carried out under pressure, and the acid esters then hydrolyzed by steam distillation or other suitable method, e.g. neutralization when alkyl ester salts are desired.  According to examples, (1) An absorption product from 94,6 per cent sulphuric acid with pentane-amylene fraction of cracked petroleum from which tertiary olefines and other unsaturated hydrocarbons had been removed was diluted with 30 per cent by volume of water and hydrolyzed at 40-50 DEG  C. under pressures of 10 and 18 lb. sq. in. with agitation.  Yields of 60-65 per cent of alcohol were obtained.  (2) A mixture of dibutyl sulphate and butyl hydrogen sulphate with free acid obtained by absorbing secondary butylene was hydrolyzed at 65 DEG  C. with an acid concentration of 75 per cent for 30 minutes at a pressure of 65 lb./sq. in.  The alcohol yield was 92,5 per cent. Similarly the hydrolysis was carried out in two stages-with agitation for 20 minutes at 55 DEG  C. under a pressure of 85 lb./sq. in. and then maintained at the same pressure without stirring for a further 100 minutes.  The yield was 88 per cent.
Patent GB-637193-A (GB)
Title: Improvements in or relating to tools for mounting electrical switch devices such as contact spring assemblies or the like
IPC: H05K13/00
Filed: 1947-06-26
Abstract: 637,193. Making electric contact spring assemblies. HOLMQVIST, N. E. F. June 26, 1947, No. 16922. Convention date, Dec. 7, 1946. [Classes 83 (ii) and 83 (iv)] Jointing.-A tool for assembling contact springs and joining them to a common connecting member of insulating material comprises a movable member formed with parallel slots to receive the springs and with apertures to receive the connecting member which also passes through similar apertures in the springs. Each contact arm 24 is provided with two holes shaped as shown in Fig. 5c. Pivotally mounted about axles 19, 20 in the base 22 of the tool are two sets of tong-like members 17, 18 each comprising arms adapted to be brought together and then held in closed position by means of an inverted U-shaped member 15. The two members 15 are connected by a plate 14 to a common operating lever 1 so that they serve also for moving the members 17, 18 about their pivots. When the arms are together, notches therein co-operate to form hexagonal holes. In operation, a number of contact arms are assembled in slots formed in the upper ends of the tongs 17, 18 with all the holes in alignment. A hexagonal rod 41 of insulating material is passed through each set of aligned holes and the tongs are then moved about their pivots in a clockwise direction, while the contact arms are kept horizontal. This has the effect of rotating the rods within the holes from the position shown in Fig. 10 to the position shown in Fig. 12, so that the material of the contact arms bites into the corners of the hexagonal rod and secures the arms to the two rods.
Patent GB-1021704-A (GB)
Title: Improvements in or relating to a stop indicating system for road vehicles
IPC: B60Q1/44
Filed: 1964-04-23
Abstract: 1,021,704. Road traffic signals on vehicles. C. VAN DER LELY N.V. April 23, 1964 [May 21, 1963], No. 16963/64. Heading G4Q. [Also in Divisions F1 and H2] A stop light on a vehicle is illuminated when a gear lever is displaced towards a neutral position at a speed in excess of a predetermined minimum. In the arrangement shown an hydraulic variable-speed gear is controlled by a gear lever 7 which is connected to a piston 12 in an oil-filled cylinder 11. When the lever 7 is displaced away from its central position, the piston rises in the cylinder and oil passes through a channel 28 and through a duct 17 against the pressure of a weak spring 16 acting on a ball 15. Movement of the lever back to its neutral position causes the piston to be lowered, and movement of the oil is impeded because duct 20 is closed by a ball 18 and a stronger spring 19; consequently the pressure of the oil in the lower part of the cylinder rises and, if the movement of the lever is sufficiently rapid, is sufficient to close a pressure switch 22 which completes the electrical circuit for the stop light 26.
Patent GB-1128276-A (GB)
Title: Extrusion process
IPC: B29C48/85
Filed: 1967-04-13
Abstract: 1,128,276. Extruding foamed thermoplastics. MOBIL OIL CORP. 13 April, 1967 [13 April, 1966], No. 16986/67. Heading B5A. [Also in Division C3] The screw impeller 10 of an extruder for producing foamed thermoplastics comprises an upstream portion having a channel 17 for the circulation of a cooling medium, e.g. water, which extends from the upstream end of feed zone A for a distance between 2 and 5 times the screw diameter. Furthermore in this zone, screw shaft 16 is of reduced diameter. Zones B, C, D and E are respectively a melt zone, an injection zone, blowing agent, e.g. liquid pentane, being introduced via conduit 18, a mixing zone and a cooling zone. Heat-transfer fluids are circulated in jackets 19. The extruder is shown having a tube-producing die orifice 14. The apparatus is particularly suited to the use of a starting material in the form of beads coated with a cell size control material, e.g. polystyrene beads having a coating comprising sodium bicarbonate, anhydrous citric acid and citric acid hydrate. Such beads may also contain the blowing agent, e.g. pentane, encapsulated therein. An example is given.
Patent GB-424998-A (GB)
Title: Improvements relating to the treatment of feathers and similar stuffing material in pillows, cushions and the like
IPC: B68G3/02
Filed: 1934-06-08
Abstract: 424,998. Cleaning feathers &c. WURINGER, T., 47, Zirkusgasse, Vienna. June 8,1934, Nos. 17058 and 17059. Convention dates, Oct. 23, 1933 and May 15, 1934. [Class 138 (i)] [See also Group XXVIII] A method of cleaning feathers and similar stuffing in pillows, cushions, &c., consists in introducing a jet of air into the envelope enclosing the stuffing and varying the direction of the jet. Means may be provided for withdrawing the air from the envelope. In the construction shown in Fig. 6, a pillow P is provided with a nozzle member St<1> of double conical form which is adapted to hold detachably an inserted nozzle B<1> connected to an airblowing device. The member St<1> is flexible and when not in use the outer half may be folded and tucked inside the envelope, a press fastener retaining it in folded position. The member may be detachably fastened in the pillow as shown in Fig. 9, in which case it is provided with a ring R<1> co-operating with a rubber ring R<2>. Fig. 10 shows a nozzle in the form of a tube with an inner pipe L adapted to convey air through a coarse mesh filter F<1> into the pillow. The air is withdrawn through a fine-mesh filter F<2> and an outer pipe A to a dust bag B. For the purpose of cleaning the filters, a control device may be arranged at O by which the connection to the dust bag may be closed, and the pipe A may be connected to the pipe L so that the flow of air in the pipe A is reversed. Instead of a dust bag, a vacuumcleaner may be attached to the nozzle member, the pipe L being open to the atmosphere, or being connected to an air-blowing device.
Patent GB-778451-A (GB)
Title: Improvements in or relating to the manufacture of hydrazine
Inventor: NICOLAISEN BERNARD HENRY
IPC: C01B21/16
Filed: 1954-06-10
Abstract: In the production hydrazine by a two stage reaction of sodium hypochlorite with ammonia as aqueous medium, sufficient ammonia is initially employed to produce chloramine in an intermediate reaction zone, e.g. at a temperature less than 15 DEG C., the amount of ammonia emplayed being less than one-tenth of the total ammonia employed in the reaction, whereafter the intermediate reaction product is passed without back mixing to the final reaction zone, in the presence of a negative catalyst, after admixture with gaseous ammonia at elevated pressure to provide a molar ratio of ammonia to chloramine of 15-45 : 1 and to heat the reaction mixture to 120-150 DEG C., the reaction period in the final reaction zone being limited to 3-30 sec.  The solution may be heated, if necessary, by means of a heat exchanger after introduction of the gaseous ammonia.  A pressure of 200-400 p.s.i.g., preferably 300 p.s.i.g., may be maintained in the final reaction zone which may be in the form of a tubular reactor having a length to diameter ratio of 15-18 to 1.  After completion of the reaction ammonia is flashed off and returned to the process. Hydrazine is recovered from the liquid remaining in known manner. As catalyst 0.066-0.33 gm. of fish glue or gelatin per litre may be employed.  Specifications 22957/07 and 139/08 [both in Class I] are referred to.
Patent GB-1057116-A (GB)
Title: Processes for preparing 2-alkyl-cyclopentane derivatives, and the derivatives thus prpared
IPC: C07C45/67
Filed: 1964-04-24
Abstract: The invention comprises compounds of the formula <FORM:1057116/C2/1> (wherein R is alkyl and R5 is hydrogen or alkyl) and their enolic forms, and their preparation by reacting compounds of the formula <FORM:1057116/C2/2> (wherein R3 and R4 are alkyl) with an alkali metal alcoholate in an aprotic solvent to form the required 4-alkoxycarbonyl compounds and, if desired, hydrolysing these to the free acids. This process may be combined with the further step of decarboxylating the free acids to form 1,3-dioxo-2-alkyl-cyclopentanes, with or without isolation of the carboxylates.
Patent GB-715125-A (GB)
Title: Air coolers
Inventor: MUCKLEY HENRY EDWARD
IPC: F04B39/06
Filed: 1951-07-19
Abstract: 715,125. Tubular heat-exchangers. BELLISS & MORCOM, Ltd. July 11, 1952 [July 19, 1951], No. 17148/51. Class 64(3) An air cooler comprises a casing a containing at least one assembly of parallel coolant tubes over which air is caused to flow from an air inlet b to an air outlet c provided on the casing the air' inlet and air outlet each extending over substantially the whole length of the tube assembly, a perforated plate e being provided in the air inlet and the air outlet to effect a uniform distribution of the air over the tubes, and headers i, k being provided to cause the coolant to flow through some of the tubes in one direction and through the other tubes in the opposite direction. In the form shown the headers k are each carried by a spigot m which is received in a socket n at the end of the casing. Two tube assemblies g, f are provided (see Fig. 2), the air flowing downwardly over tubes g and then upwardly over tubes f to the outlet, the casing being divided into two passes by a partition o. Any condensate from the cooled air is drained off by means of a cock r.
Patent GB-834212-A (GB)
Title: Improvements in or relating to electrical generating plant
Inventor: TAYLOR HARRY FREDERICK WOODWAR
IPC: H02J3/42
Filed: 1955-06-14
Abstract: 834,212. Electromagnetic relays. LISTER & CO. Ltd., R. A. June 14, 1956 [June 14, 1955], No. 17156/55. Class 38 (5). [Also in Group XXXV] An electromagnetic synchronizing relay has a 3-linked laminated magnetic core, two of the links 16, 17 being fixed and the third pivoted. Windings 16a, 17a are connected to the two sources to be synchronized and are arranged so that at synchronization the magnetic flux is reduced, allowing spring 18 to move limb 15 and close the contact 21.
Patent GB-419316-A (GB)
Title: Improved book-holder, suitable for invalids and others
IPC: A47B23/00
Filed: 1933-06-16
Abstract: 419,316. Reading-desks. COURSE, F., 39, Thistlewaite Road, Clapton, London. June 16, 1933, No. 17168. [Class 52 (iii).] A device for holding books in position adapting them to be read by persons lying in bed consists of telescopic members B, C on a vertically-adjustable bar A attached to the bedstead L or other supports ; at the outer end of the member C is a vertical arm D and a shorter member E with a pivot F supporting adjustably a frame G with pins I, J for engaging a book H, and a leaf-holder K.
Patent GB-118036-A (GB)
Title: Improvements in Boxes of Cardboard or the like for Inverted Incandescent Gas Mantles.
Inventor: AYTON FRANCIS ROYD
IPC: B65D85/42
Filed: 1917-11-21
Abstract: 118,036. Ayton, F. R. Nov. 21, 1917. Boxes made from special blanks; fittings, internal. -A box for holding an inverted incandescent gas mantle is formed from two blanks shaped as shown in Figs. 1 and 2. The blank shown in Fig. 1 is bent as shown in Fig. lies over the parts A, E being interlocked to form the bottom of the box. The part M, Fig. 2, is then arranged so that it lies over the parts A, E J. the platform G being disposed horizontally. The top C of the box is made narrower than the base A, E so as to prevent the front and back panels N, L from being pressed inside the box between the sides B, D. The platform G may be formed as a separate fitting with a holding-down lap such as J at each of its sides; or it may be made integral with the blank shown in Fig. 2.
Patent GB-1422099-A (GB)
Title: Synchronous motor
IPC: H02K7/116
Filed: 1974-04-19
Abstract: 1422099 Electric motors AMF Inc 19 April 1974 [18 May 1973] 17217/74 Heading H2A A synchronous motor has a rotor and stator mounted inside an electrically insulating easing 10 designed to ensure that when the casing is connected to a gear casing 11, an output pinion 23 of the motor is automatically aligned with a gear wheel in the gear casing. The motor shown has a permanent magnet rotor 68 and interdigitated stator poles 65, 66. The stator poles are pressed against an end wall of the motor casing by a resilient cover 12 secured to the rim of the motor casing and having a projection 70 pressing against the stator core 22. The rotor is rotatable about a stub shaft 24 mounted in the stator core. A guide boss 38 in the end wall of the motor casing is shaped to be a close fit in an aperture in the gear casing, thus ensuring the desired alignment of the output pinion 23 and the gear wheel. The motor includes a mechanical device 21, 67 ensuring rotation in the desired direction and is intended for use in clocks and timers.
Patent GB-1255174-A (GB)
Title: Process for the polymerisation of styrene in aqueous suspension
Inventor: RICHARDS COLIN TEMPLE
IPC: C08F2/16
Filed: 1968-04-10
Abstract: 1,255,174. Aqueous suspension polymerization of styrene. BRITISH PETROLEUM CO. Ltd. 6 March, 1969 [10 April, 1968], No. 17224/68. Heading C3P. Styrene is polymerized in aq. suspension to an average mol. wt. of 30,000-200,000 in the presence of a free radical initiator and a waterinsoluble Ca, Ba or Mg phosphate, the pH of the suspension being maintained at 5.0-8.0. A chain transfer agent may also be present. In the examples styrene was polymerized in an aq. suspension of t-dodecyl mercaptan, benzoyl peroxide, 1,1 - di - t - butyl peroxy 3,5,5 - trimethyl cyclohexane and as suspending agent apatite (prepared from a mixture of tri-sodium orthophosphate, di-sodium hydrogen orthophosphate and calcium chloride) with a sodium alkyl phosphate as an extender.
Patent GB-1360347-A (GB)
Title: Halogen filament lamp
IPC: H01K1/14
Filed: 1972-04-14
Abstract: 1360347 Electric incandescent lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 14 April 1972 [17 April 1971] 17286/72 Heading H1F In an elongate tubular, halogen filament lamp in which a helically wound filament 4 is stretched between pinch seals 2, 3 closing each end of the envelope 1, the filament has a length of its turns short-circuited by a helically wound piece of wire 13 disposed coaxially of the filament axis to form at least one reduced-light-emissive part between two light-emissive other parts, the arrangement of the filament parts being such that a surface disposed parallel to the filament axis can be evenly illuminated along the axial length of the filament. As shown, the ends of the wire 13 are curled to engage the wall of the envelope to provide filament supports 11, 12. Intermediate the supports 11, 12 the wire 13 is disposed between adjacent turns of the filament. The lamp is suitable for use as a copying lamp and the short-circuited region between points A and B may be 40 mm. in length. In an alternative embodiment, Fig. 2 (not shown), the shortcircuiting wire and the filament are formed as a single wire by winding the filament wire in a first direction, then back on itself over the reduced-light-emissive region and then forwards again in the first direction. More than one reduced-light-emissive region may be present along the filament length.
Patent GB-1177856-A (GB)
Title: Process for Resolution of Optical Isomers or Racemic Ammonium Pantoate by Preferential Crystallization
IPC: C07C233/45
Filed: 1967-04-14
Abstract: 1,177,856. Resolution of racemic ammonium pantoate. FUJI CHEMICAL INDUSTRIES Ltd. 14 April, 1967 [10 May, 1966], No. 17291/67. Heading C2C. Racemic ammonium pantoate is resolved into optical isomers by a process comprising (a) dissolving racemic ammonium pantoate and either the D- or L-isomer of ammonium pantoate in a hot solvent which is (A) one or more C 1-4  aliphatic alcohols, (B) one or more alkoxy substituted ethanols, (C) a mixture of (A) and (B), or (D) a mixture of water with (A) and/or (B), to prepare a solution which can be cooled to form a liquid saturated or supersaturated solution in which either the D- or the L- isomer is present in excess; and (b) cooling the solution to obtain crystals of ammonium pantoate which comprise preferentially the isomer which is present in excess. Seed crystals of the appropriate isomer are preferably added between step (a) and step (b). The mother liquor remaining after removal of the crystals can be similarly treated to produce crystals of the other optical isomer. D- or L-pantolactone is prepared from the isolated crystals by treatment with a mineral acid, removal of the water formed, followed by the addition of an organic solvent to eliminate the ammonium salt formed.