baber/WOPTO huggingface dataset:
Patent GB-1035635-A (GB)
Title: Improvements in or relating to transistor circuit arrangements for supplying a voltage to a load
IPC: G05F3/18
Filed: 1964-04-20
Abstract: 1,035,635. Automatic voltage control. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. April 20,1964 [April 23, 1963], No. 16254/64. Headings G3R and G3X. A load 2 connected between the emitters of two transistors 3, 4 of opposite conductivity types is supplied from a source 1 connected between the collectors of the transistors, and an auxiliary source 5 of lower voltage than source 1 is connected between the bases of the transistors so that the voltage across the load 2 is approximately equal to that of source 5. The auxiliary source may be constituted by a Zener diode (Fig. 2, not shown) or a potential divider (Fig. 3, not shown). In one embodiment giving better stablization of the voltage across the load, the transistors 3, 4 are replaced by transistor combinations and the Zener diode is associated with amplifying transistors having their bases connected to a potential divider shunted across the load 2 (Fig. 4, not shown).
Patent GB-187576-A (GB)
Title: Improvements relating to fluid compressors
IPC: F04B7/04
Filed: 1922-06-12
Abstract: 187,576. Westinghouse Brake & Saxby Signal Co., Ltd., (Assignees of Westinghouse, H. H.). Oct. 15, 1921, [Convention date]. Valves, arrangement of.-The inlet valve of a compressor communicates with the piston chamber by a port which is closed by the piston ate a determined point in the stroke, so that the inlet valve is cut off from fluid at high pressure, preventing leakage through the valve. As shown, a poppet valve 4 provided in the cylinder head communicates through a port 6 in the cylinder wall, opening into the cylinder at a distance from the head; an outlet valve 3 is provided. A piston valve may replace the inlet poppet valve.
Patent GB-438063-A (GB)
Title: Improvements in or relating to bleaching agents and the like
IPC: D06L4/12
Filed: 1934-05-31
Abstract: The bleaching, washing, &c. compositions having a basis of per-compounds, salts of pyro- and meta-phosphoric acids, and alkaline substances, described in the parent Specification, are modified by replacing the magnesium silicate, added for stabilizing purposes, by other sparingly-soluble or insoluble silicates of the alkaline earth metals, of zinc or of cadmium, added in the ready-formed state.ALSO:The bleaching, washing, &c. compositions having a basis of per-compounds, salts of pyro- and meta-phosphoric acids, and alkaline substances, described in the parent Specification are modified by replacing the magnesium silicate, added for stabilizing purposes, by other sparing-soluble or insoluble silicates of the alkaline earths, of zinc or of cadmium, added in the ready-formed state.
Patent GB-200087-A (GB)
Title: Process for the production of solid polymerisation products of acetylene
IPC: C08F10/00
Filed: 1923-06-22
Abstract: In the production of solid polymerization products of acetylene, such as "cuprene," by bringing acetylene into contact with a catalyst, for instance copper, at a raised temperature, losses due to coking are reduced by adding 5-15 per cent by volume of nitrogen to the acetylene.  An example is given.
Patent GB-958484-A (GB)
Title: Method and apparatus for impact pulverisation-classification
IPC: B02C23/32
Filed: 1963-04-25
Abstract: 958,484. Impact pulverizers; centrifugal separators. E. I. DU PONT DE NEMOURS & CO. April 25, 1963 [April 27, 1962], No. 16306/63. Headings B2A and B2P. Apparatus for pulverizing and classifying solids comprises a centrifugal impact mill, means for introducing solids to be pulverized together with carrier gas radially of the mill, a closed generally circular cross-section chamber in open communication with the pulverized product delivery side of the mill, the chamber being provided with a centrally disposed port for the withdrawal of fine pulverized solids entrained in carrier gas exiting from the mill and a plurality of gas inlet ports disposed in the peripheral wall of the chamber for introducing additional carrier gas into the chamber thereby to maintain a vortical flow of carrier gas within the chamber for effecting a particle size classification of pulverized solids delivered by the mill and dispersed in the carrier gas. The apparatus shown in Figs. 1 and 2 comprise a mill having an inlet 40 for solids to be pulverized and a rotary disc 45 provided with radial vanes 47 for drawing in air through port 40 as well as through recycling ducts 39, and louvres 55 arranged around the entire circumference, at intervals from 5 to 15 degrees, of a receiver 38 for supplying additional air, preferably between 0À1 and 0.9 sonic velocity, tangentially to a classifier chamber 57, the receiver having air supplied thereto from a duct 34, Fig. 1, by means of a fan 32 and duct 35. The chamber 57 is provided with plates 60, 62 rotatable with the disc 45. The periphery of plate 62 is provided with vanes 64 for ejecting coarse solids from the pulverizer and from the classifier through a trough 65 to the ducts 39. The fine fraction resulting from the classification is concentrated of the vortical flow of the classification air and is withdrawn from chamber 57 by a fan 31 which delivers it to a volute casing 36. A trough for removing coarse solids from the pulverizer may be provided between trough 65 and the anvil face 50 of the pulverizer. Also, the plate 62 may be stationary or the plates 60, 62 may be driven from the shaft of motor 30. Further, one or more of the ducts 39 may be used for feeding solids. In a modification, Fig. 3, the louvres 55 may be replaced by nozzles 77 for supplying steam, at or above sonic velocity, into classification chamber 78, the nozzles being cylindrical or of converging-diverging type and in the latter case dimensions are given. The steam effects additional grinding so that recycling is not necessary. It is stated that the louvres 55 and nozzles 77 may be used in conjunction with each other and that the same mill may be used interchangeably with the classifier of Figs. 1 and 2 or that of Fig. 3. Specification 844,148 and U.S.A. Specification 2,694,492 are referred to.
Patent GB-632395-A (GB)
Title: Improvements in or relating to 6-substituted thiouracil compounds and process of preparing the same
IPC: C07D239/56
Filed: 1947-06-20
Abstract: 6-Cycloalkyl- or 6-alkylcycloalkyl-2-thiouracils are prepared by condensing thiourea with a b -cycloalkyl- or b -alkylcycloalkyl-b -oxopropionic acid ester, wherein the cycloalkyl- or alkylcycloalkylradical has 3-5 carbon atoms, in the presence of a strong base as a condensing agent, such as an alkali metal alkoxide.  The cycloalkyl radical may suitably be a cyclopropyl or alkyl cyclopropyl radical, a cyclobutyl or methylcyclobutyl radical or a cyclopentyl radical.  The compounds of the invention may be converted into salts by treatment with bases, e.g. alkali metal hydroxides, ammonia or alkaline earth hydroxides.  In examples: (1) ethyl b -cyclopropyl-b -oxopropionate is added to thiourea in alcohol in the presence of sodium ethoxide to give 6-cyclopropyl-2-thiouracil; (2) ethyl b -cyclobutyl-b -oxopropionate is reacted with thiourea as in (1) to give 6-cyclobutyl-2-thiouracil; and (3) ethyl b -cyclopentyl-b -oxopropionate is reacted with thiourea as in (1) to give 6-cyclopentyl-2-thiouracil.  Cycloalkyl-oxopropionic esters may be prepared by the condensation of a cycloalkyl methyl ketone with diethyl carbonate in the presence of a metallating agent such as sodamide or in the presence of sodium ethoxide; by the reaction of diethyl oxalate with a cycloalkyl methyl ketone to give a substituted glyoxylic acid ester which is then heated to lose carbon monoxide; by the condensation of a cycloalkyl carbonyl halide with ethyl acetoacetate, followed by removal of the acetyl group; or by reaction of a cycloalkyl carbonyl halide with malonic ester in the presence of a basic catalyst followed by removal of one carbethoxy group; e.g. ethyl b -cyclopropyl-b -oxopropionate is prepared by reacting cyclopropylmethyl ketone with diethyl carbonate in the presence of sodamide or by condensing cyclopropane carbonyl p  chloride with ethyl acetoacetate followed by treatment with gaseous ammonia; ethyl b -cyclobutyl-b -oxopropionate is prepared by reacting cyclobutane carbonyl chloride with ethyl acetoacetate followed by ammonia treatment and ethyl b -cyclopentyl-b -oxopropionate is similarly prepared from cyclopentane carbonyl chloride and ethyl acetoacetate. Cyclopropane carbonyl chloride is prepared by treating g -chlorobutyronitrle with potassium hydroxide to give cyanocyclopropane which is hydrolysed to the carboxylic acid and treated with thionyl chloride to give the acid chloride.  Cyclobutane carbonyl chloride is prepared by reacting cyclobutane carboxylic acid with thionyl chloride.  Cyclopentane carbonyl chloride is prepared by adding sodium in alcohol to a -chlorocyclohexanone to give cyclopentane carboxylic acid which reacts with thionyl chloride to give the acid halide. Specification 452,043, [Group XX], is referred to.
Patent GB-514756-A (GB)
Title: Improvements in or relating to the jet propulsion of water-borne vessels
IPC: B63H11/00
Filed: 1938-06-01
Abstract: 514,756. Jet propulsion apparatus. GOODYEAR, J. W. June 1, 1938, No. 16342. [Class 114] . Jet propulsion apparatus for ships which includes a pump discharging water along alternate paths through an outlet duct, is also - provided with a pivoted, vane in the outlet passage to control the cross-sectional area without diverting.any of the water along the alternative path. The pump delivering water through the volute passage 10 to the outlet 11 in the plating 12 of the ship has its discharge controlled by a vane 17 pivoted at 18 and with inner surfaces 19, 20 which conform to the shane,of the outlet surface. The vane 17 is adjustable to vary the cross-sectional area and the discharge from the pump. In addition there is provided a curved vane 14 pivoted at 16 which provides for directing the flow, to provide a reversal of the ship's motion. As the vane 14 blocks off one path, the part of the vane 17 behind it is inoperative. The vane may float freely or be controlled positively and it may have at its ends freely pivoted extensions which under fluid action set the vane into position. Specification 503,792 is referred to.
Patent GB-529618-A (GB)
Title: Improvements in liquid level gauges
IPC: G01F23/02
Filed: 1939-06-05
Abstract: 529,618. Indicating liquid levels. VERMOHLEN, M. June 5, 1939, No. 16439. [Class 123 (i)] A gauge channel a is provided with mica strips b at front and rear, secured by metal covers c having alternate slots d and webs f. The covers c are so placed in relation to one another that light entering at x passes through the steam space without appreciable deflection and emerges through a corresponding slot d, while light entering at y is refracted by the water and intercepted by a web f. A light-guiding screen g has relatively long narrow guide channels h while a corresponding screen i has larger light-guiding channels k. The emergent light is received on a frosted glass screen m so that it is visible over a wide range. In a modification, Fig. 2, the slots d are uninterrupted, and light is received through a narrow vertically-extending channel h. Light passing through the steam space emerges through the wider channel k, but light refracted by the water is intercepted by the solid part of the plate c.
Patent GB-868241-A (GB)
Title: Improvements in photographic sensitive materials and in photographic reproduction methods using the same
IPC: G03C8/24
Filed: 1957-05-23
Abstract: 868,241. Photographic migratory transfer processes. KODAK Ltd. May 23, 1957 [May 23, 1956], No. 16445/57. Class 98(2) Photographic material for the migratory transfer process comprises a support, a silver precipitating layer and then a light-sensitive silver halide emulsion layer the binder of which is an alkali-soluble dibasic acid monoester of a cellulose ether or ester having free hydroxyl groups. After exposure and development in an alkaline developer containing a silver halide solvent, during which development migratory transfer takes place, the silver halide emulsion layer may be washed off, leaving a positive image in the silver precipitating layer. The silver halide binder may be cellulose acetate phthalate or a phthalic succinic or maleic acid mono-ester of cellulose ethyl ether. The support may be lenticulated and if necessary it may be subbed. The precipitating layer may be of gelatin or cellulose ester containing a sulphide, selenide, heavy metal, thiourea, mercaptan, stannous halide or fogged silver halide. Before applying the emulsion layer to the precipitating layer, a thin layer of one of the alkali-soluble mono-ester of the cellulose derivative may be applied. Migratory transfer may take place in the presence of a mercapto-1:3:4-oxadiazole or a mercapto 1:3:4- thiadiazole as described in Specification 868,243, or of 3-methylbenzthiazoline-2-thione or 3-carboxymethylbenzthiazoline-2-thione. These compounds may be employed in combination with each other or with 1-phenyl- 5-mercapto-l :2:3 :4-tetrazole. Further, 1;3- dimethylbenzene-4-sulphonic acid may be employed during development as a tone-modifying agent. Specifications 524,087, 649,545, 667,206, 722,594, 724,827, 743,014, 767,670, 767,671, 767,672, 767,699, 767,700, 767,701, 767,702, 778,792 and 868,242 also are referred to.
Patent GB-1455724-A (GB)
Title: Carbon fibre production
IPC: D01F9/22
Filed: 1973-04-06
Abstract: 1455724 Polyacrylonitrile fibres NATIONAL RESEARCH DEVELOPMENT CORP 29 March 1974 [6 April 1973] 16546/73 Heading B5B [Also in Division C1] Polyacrylonitrile fibres as precursors for carbon fibres are spun under conditions in which particles, and also in the case of the spinning solution gas bubbles, are excluded from the liquids employed in the spinning process. Particles greater than 0À05 microns may be excluded by appropriate filters.
Patent GB-1343929-A (GB)
Title: Socket contact for an electrical junction assembly
IPC: H01R13/20
Filed: 1971-05-24
Abstract: 1343929 Two-part couplings BURNDY CORP 24 May 1971 [28 May 1970] 16559/71 Heading H2E A socket contact 16 comprises a central bore 54 with an aperture 58 extending from the external surface to the bore and a slit spring band 20 encircling the socket, the band having a detent portion 70 which projects through the aperture and into the bore and a spout 68 which can receive a lever-tool 72 for deflecting the spring to remove the portion 70 from the bore. The socket has a flat surface 56 in which the aperture 58 is formed while the slit 62 in the spring band is inclined to the central axis, the portion 70 serving to position the band and to interlock with a circumferential groove (76) on a mating pin contact 74, withdrawal of the pin being prevented unless the portion 70 is removed from the groove (76) by the tool 72 being inserted into the spout 68 through an extension 78 of a housing part 10. A plurality of sockets may be interconnected by seating them in a conducting base 18 and enclosing them in an insulating housing of two parts 10, 12 to form a junction assembly, projections 36 on the sockets seating against a wall 28 having openings 32 in which the mouths of the sockets are contained, with the spouts 68 aligned with extensions 78. The housing parts are joined together by mounting blocks 42, which extend through openings 38, 40. The housing may be mounted on a support or be stacked with other housings by means of openings 48, 50 in the blocks.
Patent GB-780491-A (GB)
Title: Improvements in or relating to articles formed by powder metallurgy
Inventor: OLIVER DONALD ARTHUR
IPC: F01D5/28
Filed: 1954-06-08
Abstract: 780,491. Powder metallurgy. BIRMING- HAM SMALL ARMS CO., Ltd. June 8, 1955 [June 8, 1954], No. 16696/54. Class 82(1) [Also in Group XXVI] A powder metallurgy article for use at high temperature, such as a turbine blade, is formed wholly as a substantially solid porous compact of porosity in the range 5-50 per cent with a plurality of internal ducts in the porous material itself for the internal supply of cooling fluid, with provision for connecting at least one end of each duct to an external supply of fluid. Fig. 1 shows a turbine blade 1 formed of sintered material mounted on and sintered to a root 2 which may itself be of sintered metal or of cast metal. Supply passage 3 carries cooling liquid from an external source to transverse branch 4 which feeds ducts 5 in the blade portion. Towards the tip of the blade short transverse ducts 11 extend towards the leading edge and ducts 12 extend towards the trailing edge of the blade to increase the " sweat cooling " effect at these points. In Fig. 3 the sintered porous blade portion is mounted between a root portion 15 and tip portion 16, the tip portion fitting in a hollow retaining ring 17 for the assembly of blades. Cooling fluid may circulate from the root passage 18, through ducts 21, 22 and 23 to the retaining ring or in the opposite direction or it may be forced from both tip and root into the blade. liquid passing through or into the blade exudes through the porous material to the blade surface to provide the cooling effect. Specifications 647,701 and 673,204 [Group XXXVT] are referred to.
Patent GB-910009-A (GB)
Title: Method and apparatus for "powderless" etching of plates
IPC: C23F1/08
Filed: 1960-05-21
Abstract: 910,009. Etching-apparatus. DIRATS & CO. Inc., J. May 12, 1960 [July 6, 1959], No. 16732/60. Class 100 (2). The presensitized surface of a printing-plate is etched by liquid directed at all times such that it impinges upon the surface at a substantially constant preselected single angle with the normal to the surface at the point of impact. The apparatus shown, comprises a tank 10 having covers 12 and a holder 13 which supports the downwardly facing surface 15a of a printing- plate 15. The tank houses a rotatable horizontal manifold 14 having a duct 21 and a plurality of crosswise tubular members 22 through which " powderless type " etching liquid is directed upwardly in a plurality of streams at a constant angle against the plate surface 15a. The etching liquid, which is constantly agitated by paddles 36 driven by the motor which rotates the manifold, is circulated from the tank through the manifold by a motor-driven pump 29 via piping 31 and a fluid-tight rotary joint 19. The axis of rotation R<SP>1</SP> of the manifold, which is arranged to coincide with the centre of the plate 15, is offset from the centre " G " of the circular arrangement of the tubes 22. In assembling the manifold a notch in each tube 22 is fitted directly over an associated slot 24 in the duct 21. Strip heaters 40 and cooling coils 41 may be used to maintain the liquid at any desired temperature whilst venting of the tank is effected by an exhaust fan (not shown) through a flue 43 having slots 44. Specification 862,779 is referred to.
Patent GB-545427-A (GB)
Title: Improvements in or relating to blasting cartridges
IPC: F42B3/00
Filed: 1940-11-22
Abstract: 545,427. Blasting cartridges DU PONT DE NEMOURS & CO., E. I. Nov. 22, 1940, No. 16773. Convention date, Nov. 22, 1939. [Class 9 (i)] The paper or like rupturable casing of a blasting cartridge is provided with one or more rows of perforations or other weakening indentations G, arranged at an acute angle to the axis of the cartridge, to enable the latter to conform to irregular shape or size of the borehole by ordinary tamping. The rows of perforations &c. may be arranged in register, or off-set, in the rolled casing.
Patent GB-221896-A (GB)
Title: Improvements in gaseous fluid compressors or pumps partly applicable to fluid pressure motors
IPC: F04B39/08
Filed: 1923-06-28
Abstract: 221,896. Jones & Attwood, Ltd., and Midderigh, I. June 28, 1923. Oscillating valves ; linkage gears.-A distributing valve for compressors or motors comprises a chambered or ported semi-rotary sleeve oscillated circularly through a link pivoted at one part to the valve or its spindle and rotated at another part, the axes of the pivot or the like and of the revolving part being transverse, to one another ; the rotation may be effected from a disc. The Figure shows a valve 2 common to a pair of compressor cylinders 1, the pistons of which are driven oppositely from a common crank-shaft 9. The valve is formed with a single inlet port 3 separated by partitions from a pair of outlet ports, and its spindle 17 is supported in ball bearings and connected by a pin 16 with a link 15 provided at its end with a roller or ball bearing fitting in a hole in a disc 14. This disc is rotated on a shaft 13 through screw gearing 11, 12 from the crank-shaft. The ports are opened and closed rapidly at the ends of the stroke, and the movement is slow when the piston velocity is greatest. The return of the valve from its dead position is assisted by springs 28. The valve mechanism and the upper part of the shaft 13 are enclosed in a detachable casing 36 secured to the front of the compressor. The compressed air passes directly from the lateral outlet ports in a relatively large vessel 37 which, may be provided with a relief valve and a drain. cock.
Patent GB-726746-A (GB)
Title: Improvements in and relating to electrical signal amplifiers
IPC: H03F1/16
Filed: 1953-06-18
Abstract: 726,746. Frequency selective amplifying circuits. PHILCO CORPORATION. June 18, 1953 [June 18, 1952], No. 16867/53. Class 40 (6). The input signal is applied between the control and suppressor grid of a valve, the screen grid being held effectively at cathode potential and feed-back is neutralized by an impedance network between the cathode and suppressor grid. The input is applied over a transformer 10 to the grid of valve 16, the remote end of the secondary 32 being connected to the suppressor grid and to earth over the network 36, 38. The cathode and screen grid are held effectively at earth potential by capacitors 18, 30 and output is taken from a tuned anode transformer 21. Specification 480,417 is referred to.
Patent GB-1028455-A (GB)
Title: Apparatus for cutting cooled rolled sections
Inventor: KALLA HANS
IPC: B21B15/00
Filed: 1964-04-23
Abstract: 1,028,455. Shearing. WISSENSCHAFTLICH - TECHNISCHES ZENTRUM AUSRUSTUNGEN FUR DIE SCHWERINDUSTRIE UND GETRIEBEBAU VEB. April 23, 1964, No. 16880/64. Heading B3W. A shear for cutting round, square and angle sections comprises two circular overlapping disc cutters of which one has peripheral teeth which are shaped so that the front and the crest or back of each tooth form a right-angle to receive an angle section for cutting, and circumferentially spaced recesses are provided in the periphery of one of the cutters to receive a round or square section for cutting. The cutters comprise a plain disc 4 and a toothed cutter 3. The crest of the tooth forms a right-angle to receive an angle section 2 conveyed by a feed means 1. When round and square sections 7 are to be cut the bars slide into the pocket between the teeth and are carried round to be sheared by the cutter 4. Cut lengths are deposited on a conveyer 5, Fig. 2 (not shown). A plurality of the shears are arranged as in Fig. 2 to cut a long bar into commercial lengths at one pass.