baber/WOPTO huggingface dataset:
Patent GB-517143-A (GB)
Title: Improvements in or relating to the production of formamide derivatives
IPC: C07C233/00
Filed: 1938-07-19
Abstract: 517,143. Formamide derivatives. DU PONT DE NEMOURS & CO., E. I. July 19, 1938, No. 21449. Convention date, July 22, 1937. [Class 2 (iii)] Mono- and dimethyl formamides are prepared by reacting methanol with carbon monoxide and ammonia at 150-300‹C. under a pressure of 300-1,000 atmospheres, and ethanol formamide is prepared by reacting ethylene glycol, carbon monoxide, and ammonia under the same conditions. The reaction is preferably carried out in the presence of a salt of a strong base with a weak acid such as an alkali metal salt of an aliphatic acid, carbonic acid or boric acid which acts as a catalyst. The preferred catalysts are sodium or potassium formate or acetate. The process may be carried out either as a continuous or a batch process. In examples: (1) a methanol solution of liquid ammonia and potassium acetate is heated in a silver-lined autoclave at 243-260‹C. for 1¢ hours at 900 atmospheres pressure of carbon monoxide to give a mixture of monomethyl and dimethyl formamides which were separated by distillation under reduced pressure. (2) The same reactants as in example (1) were heated at 210‹C. for ¢-hour and then at 245‹C. for one hour under the same pressure of carbon monoxide and the product worked up as before. (3) Ethylene glycol liquid ammonia and potassium formate are heated under 900 atmospheres of carbon monoxide at 230‹C. for 2¢ hours to give ethanol formamide. The Specification as open to inspection under Sect. 91 includes also the production of formamide derivatives of the general formula H.CO.NH.R or H.CONR2, where R stands for an alkyl, aryl, or aralkyl group or substitute group by the reaction together of an alcohol, carbon monoxide and ammonia at an elevated temperature such as 150-350‹C. under a pressure of 300-1,000 atmospheres. The alcohols used may be mono- or polyhydric and may be aromatic, adiphatic or alicyclic. Alcohols mentioned include propanol, isobutanol, propylene glycol, glycerol glycollic acid (which yields the amide of N-formyl glycine) and benzyl alcohol. This subject-matter does not appear in the Specification as accepted.
Patent GB-617988-A (GB)
Title: Improvements in or relating to bases for electron discharge tubes
IPC: H01J5/50
Filed: 1946-07-18
Abstract: 617,988. Caps and holders for discharge tubes. BROAD, D. A. G. July 18, 1946, No. 21461. [Class 38 (i)] [Also in Group XL (a)] A base for an electron discharge tube 1 comprises a vitreous disc 2 through which lead-in. wires 3, e.g. of chromeiron alloy, extend and have heads 4, which may be silver - plated, embedded in said disc by heating the latter locally and pressing the wires in with a ram. A holder 6 for the tube has co-operating spring contacts 7 riveted thereto, the tube and holder being connected together by means of a bayonet joint for which purpose the tube is provided with a ring 8 having pins 9 and 10, the latter pin being larger to prevent incorrect insertion of the tube. Alternatively, the ring may have a longitudinal rib engaging a groove in the holder, the latter in this case having a spring 12 adapted to snap over the ring 8 to secure the tube therein. If the disc is made from hard glass, the wires may be provided with heads of softer glass prior to being heated, Fig. 6 (not shown). Also, the wires may be tapered between the heads and the shanks thereof. A central evacuating tube 5 is provided on the disc (see Group XL (a)).
Patent GB-123515-A (GB)
Title: Stitch-forming Mechanism for Sewing Machines.
Inventor: FAIRWEATHER WALLACE
IPC: D05B57/02
Filed: 1917-12-31
Abstract: 123,515. Fairweather, W., (Singer Manufacturing Co.). Dec. 31, 1917. Multiple-needle sewing-machines; chain-stitching. - Relates to multiple-needle single-looper sewing-machines such as described in Specification 122,863. comprising four needles n<1>, n<2>, n<3>, n<4> co-acting with a single threaded looper 22. In order to maintain the needle-thread loops in proper spaced positions on the looper during a subsequent descent of the needles, a loop detainer 41 is adjustably secured to the underside of the throat plate and comprises three detaining point 39 curved in the direction of advance of the looper and adapted to engage the loops of the needles n<2>, n<3>, n<4> and a point 40 curved in the direction of retraction of the looper and engaging the loops of the needle n' whose loop is firs entered by the looper. The looper is formed with a shoulder 44 which first pulls the loops of the needle n<1> backwards behind the point 40 and then releases it. The other loops of thread are prevented from being drawn backwards during re traction of the looper by the detaining points 39 The needle eyes are placed at progressively lower elevations beginning with the needle n<1> to ensure passage of the looper beak at the correct distance above each eye, and the points of the needles are arranged in line to ensure that the previously formed needle-thread loops on the looper are passed simultaneously by the needle points.
Patent GB-217472-A (GB)
Title: Improved puzzle game apparatus
IPC: A63F9/10
Filed: 1923-08-25
Abstract: 217,472. Johnson, J. S., and Hitchon, H. Aug. 25, 1923. Puzzles.-A puzzle comprises a number of pieces of flat material formed with a number of flat sides adjacent each of which a distinctive marking or colouring is placed on the surface of the piece. A preferred form comprises a set of 21 hexagonal pieces A of the same size. Each piece bears, upon its edges, distinctive colourings or markings, the same colourings or markings appearing also on the remaining pieces but in different orders. The pieces are numbered from 1 to 21. The puzzle is to fit the hexagons together with like colours or markings in contact so as to form a triangle. Reference has been directed by the Comptroller to Specifications 5539/87, 6016/90, 3927/92, 149,473 and 173,588.
Patent GB-261850-A (GB)
Title: Improvements in apparatus for separating solids from liquids
IPC: B04B3/00
Filed: 1925-08-28
Abstract: 261,850. Woodall-Duckham (1920), Ltd., and Krall, R. Aug. 28, 1925. Strainer separators.-In separators of the type described in Specification 219,651, the casing is made to open into the atmosphere and a non-perforated plate serves as a water collecting surface. The wet material from the hopper a, Fig. 1, is thrown by the plate b against the conical rotating screen c and then passes to the hopper d. The casing e has openings f and a hood g hangs from the top of the casing; water drains from this hood into the trough h. The lowest ring c<1> of the screen carries a ring c<2> exactly opposite a ring d<2> on the casing and the clearance between the two is sheltered from splashes by the periphery of the ring c<1>. In the modification shown in Fig. 2, no upper casing is provided and the frame i carries only the usual machinery guards. The hood g is replaced by the conical plate m on arms l carried by the shaft k so that the plate m rotates with the screen c. The lowest ring c' of the screen carries a conical ring o entering the hopper d with a considerable clearance protected by the ring p shown on the right-hand side of Fig. 2. A pipe q discharges water to wash the plate m and a baffle ring r, shown on the lefthand side of Fig. 2, deflects the water into the trough h. Specification 261,851 is referred to.
Patent GB-905091-A (GB)
Title: Improvements relating to fluid flow control valves
IPC: F16K31/143
Filed: 1960-06-21
Abstract: 905,091. Valves. COMPAGNIA ITALIANA WESTINGHOUSE FRENI E SEGNALI. June 21, 1960 [June 22, 1959], No. 21667/60. Class 135. A pneumatically or manually-operable fluidflow control valve, such as a gate valve, comprises two coaxially aligned rods 13, 5, one rotatable but restrained from axial movement and the other movable axially, a closure member 2 attached to the rod 5, a combination of a non-rotatable piston 7 and piston stem 7a mounted on the rods within a cylinder 9 and operably associated with the rods for pneumatic operation of the closure member, screw means 13a, 40 for translating the manual rotary movement in the rotatable rod into axial movement in the axially-movable rod, and a locking means 10, 12, 18, 20 for maintaining the closure member in the open or closed position. The rod 5 has secured thereto a sleeve-like member 11 which is located in a chamber 31 formed in the stem 7a the threaded rod 13 being arranged to move within the sleeve when the latter is rotated. Pegs 12 extend from each side of the sleeve and pass through elongated slots 32 in the step, the pegs engaging in the closed position shown, with the ends of a fork 18, Fig. 2, mounted on a spring-loaded member 38 and forming part of the locking means. In manual operation, when the rod 13 is rotated by a hand wheel 16 in an anticlockwise direction, the step 7a, together with the piston 7, lifts since the latter is prevented from rotation by a pin 8. Due to a clearance space between the end 24 of the chamber 31 and the end 23 of the sleeve 11, the first part of the movement of the stem 7a causes the fork 18 to be withdrawn out of engagement with the pins 12 by the contact of a roller 20 with the side of the stem. Continued rotation of the rod 13 then lifts the stem until the ends 23, 24 abut and thereby lifts both the rod 5 and closure member 2 to the open position; the closure member is locked in this position by the engagement of the fork 18 with the pins 10. In pneumatic operation, with the closure member in the position shown, compressed-air is fed through a connection in the bottom of the cylinder, thereby lifting the piston and the stem, and due to the angle of the helix of the thread 13a, causes the rod 13 to rotate, the action of the locking means being the same as previously described. The valve is closed by feeding compressedair through a connection b in the top of the cylinder.
Patent GB-643382-A (GB)
Title: Improvements in physiologically active substances
IPC: A61K35/22
Filed: 1947-08-07
Abstract: A water and alcohol-soluble product capable of causing dilation of the capillaries of the peripheral vascular system and a transitory lowering of the blood pressure and which is free from insulin histamine and acetylcholine is obtained by keeping animal material under acid conditions of pH 4.8-6.5 for a sufficient time to disconjugate the product and adding sufficient alcohol to maintain in the treatment an alcohol content of at least 97 per cent by volume. Specified animal materials are pancreas, kidney, ovaries, muscle tissue and aminotic fluid.  The period of treatment may be 48 hours. The product of the treatment may be chilled, freed from solids by filtration and from alcohol by vacuum distillation, re-chilled and filtered, the aqueous filtrate being the active product.  Prior to the treatment the animal material may be treated to remove insulin and other proteins by a succession of treatments with aqueous alcohol not within the above defined concentration and pH ranges.
Patent GB-355464-A (GB)
IPC: C07C245/20
Filed: 1930-07-17
Abstract: Anthraquinone derivatives.-Monodiazo compounds of 1,4-diaminoanthraquinones substituted by halogen in the 2-position or 2- and 3-positions are prepared by diazotizing such compounds.  The products are rather unstable and are preferably subjected immediately to a further reaction, for example, to a Sandmeyer reaction.  In examples, (1) 1,4-diamino-2,3-dichloranthraquinone is treated with sodium nitrite in sulphuric acid, or with nitrosylsulphuric acid, or with amylnitrite in glacial acetic acid to give a monodiazo compound; (2) the monodiazo compound of (1) is treated in aqueous-alcohol with copper sulphate to give 1-amino-2,3-dichloranthraquinone : (3) the monodiazo compound of (1) is treated with cuprous chloride in hydrochloric acid to yield 1-amino-2-3,4-trichloranthraquinone : (4) the monodiazo compound of (1) is treated with potassium-cuprous cyanide to give 1-amino-2,3-dichloro-4-cyanoanthraquinone : (5) the monodiazo compound of (1) is introduced into a boiling solution of cuprous chloride to give 4,41-diamino-2,21 : 3,31-tetra-chloro-1-11-dianthraquinonyl : (6) 1,4-diamino-2-bromanthraquinone is dissolved in strong sulphuric acid and treated with sodium nitrite; the monodiazo compound is treated in aqueous alcohol with copper sulphate and warmed to 60 DEG  C. to give a mixture of 1-amino-2-bromo- and 1-amino-3-bromanthraquinone.
Patent GB-817121-A (GB)
Title: Forced throughflow steam generators
IPC: F22B29/08
Filed: 1957-07-09
Abstract: 817,121. Forced-flow steam boilers. SULZER FRERES S. A. July 9, 1957 [July 27, 1956], No. 21744/57. Class 123(2) In a forced-flow, once-through steam generator comprising a feed pump 5 supplying water through a preheater 16 to parallel-tube evaporators 15, 2 from which wet steam passes into a separator 3 wherein entrained water is removed and whence saturated steam flows through a pipe 7 to a superheater 4, the degree of wetness of the steam at the outlet ends of the evaporator tubes is kept at a predetermined value which ensures that all the tubes operate in a wet state, deposition of salts within the tubes thus being avoided. The steam wetness is controlled by adjusting the rate of supply of feedwater to the generator in dependence on variations from a preset value of the ratio between the rate of discharge of water from the separator and the rate of flow of working medium through the generator, this ratio, which may be varied according to the load on the generator, corresponding to a predetermined value of steam wetness at the evaporator outlet. The flow of working medium may be measured by a device 9 between the separator and the superheater or by a device 9<SP>1</SP> between the preheater and evaporator. The level in the separator is kept constant by a device 11 and the water flow therefrom measured by a device 10. Signals proportional in magnitude to the respective flows are transmitted from the devices 9 or 9<SP>1</SP> and 10 to a ratio regulator 12. If the flows are in the predetermined ratio no impulse passes from the regulator 12 to a regulator 13 controlling the speed of the pump 5. If deviations from the ratio occur the speed of the pump is altered accordingly.
Patent GB-500363-A (GB)
Title: Improvements in or relating to modulated carrier wave transmitters
IPC: H03F1/06
Filed: 1937-08-07
Abstract: 500,363. Wireless transmitting systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and QUILTER, W. A. E. Aug. 7, 1937, No. 21802. Drawings to Specification. [Class 40 (v)] A modulated carrier-wave transmitter comprises means for modulating oscillations from a carrier frequency source and applying floating carrier control so that the carrier level is dependent upon the varying modulation strengths ; and two amplifiers fed in parallel and feeding into a common load. The two amplifiers forming the last stage of the modulated carrier-wave amplifier chain are fed in parallel through phasing networks and feed into a common load through suitable phasing networks. The two amplifiers are arranged so that in the unmodulated condition one supplies the carrier power at high efficiency and is capable of having its output reduced to zero or nearly so while the other takes little or no power but adds power to the load under the influence of modulation. An inverse feed-back loop may be provided between the load and a suitable point in the high-frequency amplifier chain. Specifications 427,026 and 471,423 are referred to.
Patent GB-583589-A (GB)
Title: Improvements in liquid spray producing devices
IPC: B05B1/34
Filed: 1944-11-07
Abstract: 583,589. Spray - producers; valves. CROMPTON, H. D. Nov. 7, 1944, No. 21820. [Classes 69 (iii) and 135] A liquid spray producer comprises a cylindrical chamber A having a lateral inlet a, and. a spray outlet a<2> in one end, the liquid flowing around a plug B in the chamber, the inlet being regulated by a valve C. The valve C has a recess c<1> at its tapered end to control the inlet and is shaped to direct the inflow tangentially to the annular space around B. The valve housing c is opposite the inlet a. The valve handle c<2> mav be in the form of a bar so that it indicates the position of the valve to direct the liquid tangentially round the plug B.
Patent GB-531600-A (GB)
Title: Improvements in or relating to magnetic chucks
IPC: B23Q3/154
Filed: 1939-07-27
Abstract: 531,600. Magnetic work holders. NARUSE, Y. July 27, 1939, No. 21882. [Class 60] A magnetic work holder comprises two sets of magnets A, B, C &c. and a, b, c &c. mounted in frames of non-magnetic material, the upper frame being fixed in projections 2 of a soft iron base 1. The lower frame is mounted to slide by means of side rods 6 under control of a lever 9. The magnets are alternately arranged as regards polarity and the position shown in the Fig. 4 is that in which the work is clamped. When the lower frame is slid to the right, the poles are opposed in the meeting faces of the two sets of magnets and the gap in the work is reduced to permit removal.
Patent GB-1038368-A (GB)
Title: Improvements relating to the damping of the rolling motion of ships
IPC: B63B39/03
Filed: 1963-05-31
Abstract: 1,038,368. Stabilizing ships. HITACHI ZOSEN KABUSHIKI KAISHA. May 31, 1963 [June 4, 1962], No. 21891/63. Heading B7M. In a ship having a double skin or shell structure to accommodate a U-shaped arrangement of roll-stabilizing water-tanks, said structure comprises a partitioned double bottom providing the bottom sections of said stabilizing water-tanks and lateral side compartments. providing the vertical sections of said stabilizing water-tanks, through-holes in a centre keelson and side keelsons arranged vertically in the interior of the double bottom, through-holes in the opposite ends of the top plate, or in the margin plates, of the double bottom and communication between the lower part of said vertical sections formed on both sides of the ship within the double skin.
Patent GB-1055729-A (GB)
Title: Cathode ray tubes
IPC: H01J29/48
Filed: 1964-05-27
Abstract: 1,055,729. Cathode-ray tubes. SYLVANIA ELECTRIC PRODUCTS Inc. May 27, 1964 [June 4, 1963], No. 21987/64. Heading H1D. An electron gun comprises a cathode 23, Fig. 2, and first and second cup-shaped grids 31, 33 having aligned apertures, the second grid aperture having, at its end nearest the cathode, a diameter Ad2, which is at least equal to the diameter Ad1 of the first grid aperture, and which is not greater than the diameter Ad2<SP>1</SP> of the far end of the second grid aperture. The effective thickness Et2 of the second grid aperture is greater than one half of Ad2, while the effective thickness Et1 of the first grid aperture is less than one fifth of Ad1. As shown, the second grid aperture is formed by separate, different-sized apertures in space sections of a double grid end wall 55, 57. Alternatively, the apertured portions of double end wall 55, 57 may be in contact, or the second grid may comprise a single end wall formed with a frusto-conical aperture, Figs. 4-8 (not shown). The electron gun may be used in a cathodedriven, display tube, and achieves high transconductance, the second grid providing effective shielding of the first grid-cathode region.
Patent GB-442581-A (GB)
Title: Improvements in shirts
IPC: A41B1/02
Filed: 1935-08-02
Abstract: 442,581. Shirts. UNDERWOOD, H. C., 841, East 134th Street, New York, U.S.A. Aug. 2, 1935, No. 22022. Convention date, March 15. [Class 141] [See also Group IX] A shirt bosom 13, Fig. 1, is formed of a multi-ply woven fabric having a central box or knife pleat 14 at least one edge crease of which is formed by a weakened area in the fabric. The fabric, Fig. 3, consists of outer layers formed by warp threads 19 and woof threads 20, 21 and an inner layer of warp threads 18. The threads 18, 21 are omitted at the weakened lines or areas 15.
Patent GB-874965-A (GB)
Title: Improvements in or relating to electrical circuits or circuit elements
Inventor: MCLACHLAN DONALD FULTON ALEXAN
IPC: H05K1/09
Filed: 1958-07-09
Abstract: A printed circuit element comprises an insulating base on which first and second conductive layers are formed by evaporation or sputtering at reduced pressure, and a third layer is formed by electroplating. A glass plate is coated with a lead boro-silicate glaze, and the coating bonded to it by heating.  The glaze may contain molybdate or the surface may be treated with an aqueous solution of borax and ammonium molybdate.  The plate is heated in a vacuum chamber and a film of molybdenum evaporated on to it, followed by a film of copper, after which the plate is heated to near its softening point to consolidate the layers.  A further layer of copper is then added by electroplating.  The substrate may alternatively consist of silica or ceramic and the glaze coating may be omitted.  Other conductors may be used,, e.g. nickel-chromium instead of molybdenum, and gold or silver instead of copper.  When copper is used as a third layer, a protective coating of gold formed by an electroless process may be formed on top of it.
Patent GB-201774-A (GB)
Title: Improvements in and relating to combination tools
IPC: B25D1/04
Filed: 1922-08-14
Abstract: 201,774. Leak, C. Aug. 14, 1922. Wire strainers. - A tool for stretching barbed wire is constructed with a hammer head having two curved claws 15 the inner faces of which are formed with approaching ledges 16 to engage the barb of the wire.
Patent GB-316306-A (GB)
Title: Improvements in or relating to grid bias arrangements in electronic valve circuits
IPC: H04B1/16
Filed: 1929-07-18
Abstract: 316,306. Kramolin, L. L. von. July 27, 1928, [Convention date]. Thermionic valve circuits. - The grid bias potential for a valve having an equipotential cathode is taken from a resistance inserted in the individual lead from the cathode to the negative terminal of the source of anode current. The valves 1, Fig. 1, with cathodes 8 have resistances 7 connected between the cathodes and the common high-tension negative lead 6, the resistances being provided with tappings for grid-bias potentials. A circuit combining valves with directly-heated and equipotential cathodes is described, Fig. 2 (not shown). The Specification as open to inspection under Sect. 91 (3) (a) comprises also arrangements in which each cathode or group of cathodes of any type of valve has a separate lead to a resistance included in the anode circuit which produces grid bias potentials. For valves 2, Fig. 3 (Cancelled), with directly-heated cathodes, resistances 11 are connected between the high-tension negative lead 6 and a null point in each of the separate heating circuits. This subject-matter does not appear in the Specification as accepted.
Patent GB-860085-A (GB)
Title: Improvements in and relating to control systems
Inventor: HODGES JAMES MICHAEL
IPC: A61L2/24
Filed: 1956-02-02
Abstract: 860,085. Valves. MANLOVE, ALLIOTT & CO. Ltd. May 2, 1957 [Feb. 2, 1956], No. 22164/55. Class 135. [Also in Groups XXIV and XXXVII] A controller enabling any one of a number of multiple-operation processes to be carried out in an autoclave, comprises a rotatable camshaft 12 having a number of groups of cams 1-7, the number of cams (three as shown) in a group equalling the number of processes A, B, C from which a selection can be made, and a set of cam followers 30, one follower for each group, being axially movable to select one cam in each group. The cam-shaft is formed as a sleeve 12 with ribs 24 carrying cams 26 and secured on a shaft 10 driven by an electric motor switched on and off by an interchangeable cam timer disc driven by a synchronous motor which may also be controlled by a thermostat. In emergency, the shaft is turned by handle 32. Hinged cam followers 30 actuate valves V1-V5 controlling suction to, venting of, and the supply of air and steam at different temperatures to, the autoclave. By handle 54 and cam 56 the cam follower shaft 52 may be shifted axially so that the valves are operated in a sequence determined by the cams. The cams may actuate switches in circuits controlling the valves.