baber/WOPTO huggingface dataset:
Patent GB-1343680-A (GB)
Title: Muffler device
IPC: F01N3/08
Filed: 1971-04-19
Abstract: 1343680 Purifying exhaust gases NORTH AMERICAN ROCKWELL CORP 19 April 1971 [20 Feb 1970 (3)] 22281/71 Heading F1B I. C. engine exhaust gas has impurities removed from it by passing through a three stage device consisting of a first stage housing containing a mixture of alkali metal carbonates which are molten at the normal temperature of the exhaust gas, a second stage housing serially connected to the first stage containing a catalyst for effecting a reaction between CO and NO x  and a third stage housing serially connected to the second stage and containing a catalyst for effecting oxidation of Co and hydrocarbons, there being an inlet for an oxygen-containing gas following the second stage. Exhaust gas from a manifold 71 leaves a pipe 77 and impinges on a layer of alkali metal carbonates 79. A preferred mixture contains, in mol per cent 45Œ5 lithium carbonate, 30Œ5 sodium carbonate and 25Œ5 potassium carbonate, a eutectic composition having a melting point of about 395‹C. The layer may also include carbonaceous material e.g. graphite or coke, which acts as a reducing agent for nitrates and nitrites and regenerates the molten salt. Above the layer 79 the housing contains a corrosion-resistant mesh e.g. stainless steel or an alumina packing which becomes wetted with the salt during operation and increases the surface area of contact. The molten salt is prevented by the mesh from passing to the second stage and the mesh also retains partulate material e. g. lead species, in the exhaust gas. The dried gas passes along a pipe 83 to the second stage 85 which contains a dry mesh of e.g. a copper-nickel alloy which promotes reaction between CO and NO x  to form CO 2  and N 2 . The gases then pass through a baffle to a third stage 89, to which air is admitted through an inlet 91 to oxidize unburned hydrocarbons to CO 2  and H 2 O. The device may be modified to include a Venturi section 201, Fig. 10 in the gas inlet and a tube 202 leading from the Venturi section and dipping into the molten salt, so that the salt is drawn up the tube and injected into the gas stream. Near full load operation, when the gas flow becomes too great to pass through the Venturi section a by-pass duct 217 is brought into operation by opening a temperature or pressure responsive valve 219. The salt layer will be solid prior to starting the engine and is rapidly melted by the heat of the exhaust gas, a jacket 211 surrounding the device causes the gases to circulate in order to maintain the operating temperature at 500-525‹C. Electric heaters may be provided to melt the salt before the engine is started.
Patent GB-295713-A (GB)
Title: Improved electrode for the electrical fusion and heating of glass
IPC: C03B5/027
Filed: 1928-08-02
Abstract: 295,713. Soc. Anon. des Manufactures des Glaces et Produits Chimiques de St.-Gobain, Chauny, et Cirey. Aug. 19, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Electrode furnaces. - In a glass furnace the electrode is formed by molten metal E contained by a refractory sleeve or liner D which opens at one end in the pole of the furnace below the glass C and at the other end exteriorly to the furnace where a rod F connected to a conducting cable H dips into the metal. Molten tin may be used as the electrode.
Patent GB-586088-A (GB)
Title: Improvements relating to the measurement of standing waves on electrical transmission lines
IPC: G01R27/06
Filed: 1944-11-14
Abstract: 586,088. Voltage measurements. BRITISH BROADCASTING CORPORATION, and BLISS, J. L. Nov. 14, 1944, No. 22472. [Class 37] Standing waves on transmission lines are measured by measuring directly the voltage across the line conductors by using the capacitance between these conductors as a potential divider on which tappings are made by means of electrodes lying along equipotential surfaces of the electric field. The transmission lines consist of two pairs of line conductors 10A, 10B and 11A, 11B, Fig. 4, the two conductors of each pair being spaced one about 6 in. above the other and connected at intervals by metallic spacers. The two pairs are placed side by side and 10 in. apart, so that near the neutral plane the equipotential surfaces are substantially parallel planes. The electrodes are two parallel flat plates 12, 13, Fig. 3, which are 4 in. square and spaced 2 in. apart symmetrically with respect to the neutral plane. The plate assembly is carried on a platform 14 of insulating material provided with four wheels 15 adapted to run on the lower two conductors 10B, 11B, maintaining the electrode plates symmetrically placed with respect to the line. A low-capacity diode 16 is disposed between and connected across the plates 12, 13, working into a load' resistance 17. This is interrupted at its centre, where a condenser 18 is inserted. The terminals of this condenser are connected to a milliammeter 19 which is housed in a screening box 20 suspended below the platform 14. The milliammeter is shunted by a variable resistance 21 for varying the sensitivity. The screening box 20 houses a filament-heating battery 22 and the shunt 21. The instrument is supported by a stick formed in two parts 23, 24 slidable over one another for storage and transport. The electrode assembly is enclosed in an insulating casing 25. A condenser 26 corrects for asymmetry owing to the capacity between the filament and cathode of the diode 16.
Patent GB-604309-A (GB)
Title: Improvements in or relating to electron discharge apparatus
IPC: H01J19/80
Filed: 1945-08-31
Abstract: 604,309. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Aug. 31, 1945, No. 22514. Convention date, Sept. 11, 1944. [Class 39 (i)] A high-frequency pushpull circuit comprises two triode valves mounted in axial alignment by means of a cylindrical member 8, engaging external cooling portions 6 of both anodes. Cooling fluid through a pipe 9, integral with the cylinder 8, circulates fins on the cooling portions 6. Two conductive cylinders 14 connected to the grid supports 7 surround the valves and tuning of the grid-cathode circuits is by plungers 16 between those and cylinders 13 surrounding the cathode leads, while the anodegrid circuit is tuned by plungers 19 between cylinders 14 and an outer cylinder 18 with an opening for output loop 20.
Patent GB-979322-A (GB)
Title: Method of mechanically cutting symmetrical and unsymmetrical three-dimensional articles from foam plastic sheets,and apparatus therefor
IPC: B26D3/28
Filed: 1962-06-12
Abstract: 979,322. Cutting foam plastic; sawing. F. KAISER. June 12, 1962 [July 8, 1961], No. 22543/62. Headings B4B and B5L. Symmetrical or other articles are formed from a sheet 2, Fig. 5, of foamed plastic by first cutting the sheet along a central plane by a travelling cutter strip or a band saw 6, immediately after a roller 16 has compressed the sheet into a mould 14 and then repeating the operation with the sheet inverted in the mould and the cutter and roller adjusted to lie in the same plane as the surface mould. The method is used to cut the lens-shaped article 1a, 1b shown at B, Fig. 5, from the sheet 2 by first causing the cutter to cut the sheet into the two parts 2x, 2y shown at A, Fig. 5, while the roller 16, which may be rubber covered, compresses the sheet into the mould 14 and the latter is moved with its carriage 13 at the same speed as the circumferential speed of the roller; the second cutting operation, which results in the lens-shaped element, is effected by inverting the part 2y in the mould and, with the cutter and roller adjusted as described above, feeding the mould under the roller and into the cutter. The drive of the roller and feed of the mould may be positively coupled to produce the desired effect. The cutter may be arranged at an angle to the direction of feed of the mould or the latter may itself be fed along an inclined plane. In a modification, cutting occurs when the roller and cutter are moved over the stationary mould. Unsymmetrical articles, such as synthetic sponges, may be produced in a mould which is of irregular shape in plan, is inverted for the second cutting operation, and receives base inserts of differently-shaped upper surfaces for the two operations. The Specification also describes two methods previously proposed of cutting articles, in one of which the sheet 2, Fig. 2, is fed between two shaped rollers 3, 3a to a cutter 6 and in the other a press 9, Fig. 3, is used to force a semi-lecticular part 1a of the sheet 2 through an opening in the mould 8 for cutting by a cutter 6.
Patent GB-1041794-A (GB)
Title: Improved sprag brake
Inventor: THOMPSETT WILLIAM ALFRED
IPC: B60T7/12
Filed: 1962-06-13
Abstract: 1,041,794. Detent brakes. DUNLOP RUBBER CO. Ltd. June 12, 1963 [June 13, 1962], No. 22643/62. Heading F2E. A brake of the mechanical lock or sprag type comprises a rotatable cylindrical locking ring 10 having a plurality of serrations on its inner surface, a non-rotatable torque reaction member 11, a locking plunger 19 having serrations on its arcuate head portion 22 to mesh with the serrations on the locking ring wherein the plunger 19 is slidable in the torque reaction member towards and away from the locking ring 10, an actuating member 16 being provided for positively moving the plunger 19 into engagement with the locking ring such that the actuating member is moved towards the engaged position by resilient means 17 and moved away from the engagement position by fluid pressure being introduced into the cylinder recess 12 via inlet port 18. The locking plunger 19 is urged out of engagement with the locking ring 10 by a tension spring (not shown) fitted between the arcuate head portion 22 and the torque reaction member 11. A removable peg 21 is fitted between the end of the locking plunger 19 and the actuating surface of the actuating member 11 such that after a complete failure of the hydraulic fluid pressure system, removal of the peg allows the serrated head portion 22 to be moved out of engagement with the locking ring 10 by the tension spring (not shown). Re-insertion of the peg 21 causes the head portion 22 back into engagement with the locking ring and thereby prevents further rotation of the wheel to which the locking ring 10 is attached.
Patent GB-965103-A (GB)
Title: Improvements in slub catchers for yarn spinning, doubling and similar machines
Inventor: PEARSON EDGAR
IPC: B65H63/06
Filed: 1961-06-23
Abstract: 965, 103. Clearing and testing yarns. ASQUITH ELECTRICS (COLNE) Ltd June 20, 1962 [June 23, 1961; Feb. 17, 1962; May 4, 1962], Nos. 22760/61, 6219/62 and 17164/62. Headings D1F and D1J. A slub detector of the kind having one or more cylinders A1 formed with a peripheral circumferential groove a1 in a part of which the thread runs and displaces a feeler member D if the thread increases in thickness, is characterized in that the feeler or feelers D are associated with an electric circuit that opens on the passage of a predetermined minimum length of slub or double or four-fold yarn the opening of said circuit stopping the machine or operating a knife mechanism to sever the yarn. The arrangement shown in Figs. 1 and 2 employs two cylinders A1 and a cutter C that is normally held open by an electromagnet c<SP>1</SP>. When the feeler D of the first cylinder is displaced by a slub, its switch d<SP>1</SP>, which is in series with the electromagnet c<SP>1</SP>, opens and causes the cutter C to operate instantaneously. The feeler D of the second cylinder A1 has a switch d<SP>1a</SP> arranged as shown in Fig. 2 so that when the feeler D of the second cylinder A1 is displaced by a double or four-fold yarn the switch d<SP>1a</SP> is opened. In this case the electromagnet does not immediately release the cutter C since a capacitor c21 discharges through the electromagnet c<SP>1</SP> to cause a time delay. The double or fourfold yarn must thus be sufficiently long to hold the switch d<SP>1a</SP> open until the capacitor c21 has been discharged if the cutter C is to operate. In operation the instantaneous detecting device is set to pick out large size or large diameter faults and the delayed detecting device is set very fine to detect a small increase in yarn diameter and if this small increase in yarn diameter persists for more than a predetermined length the yarn is cut. In a modified construction three cylinders A<SP>1</SP> are used. The first is as described for causing an instantaneous release of the cutter C and the other two are spaced apart by a distance somewhat greater than the length of double or four-fold yarn that can be tolerated. These spaced apart cylinders A<SP>1</SP> have their associated switches connected in parallel so that both must be opened before the electromagnet c<SP>1</SP> is de-energized to release the cutter C. The peripheral slot a<SP>1</SP> in each cylinder A<SP>1</SP> varies in depth throughout its length from zero to a maximum and extends through substantially 350 degrees so that each cylinder can be turned to select the depth of the slot immediately opposite a detector feeler D.
Patent GB-480305-A (GB)
Title: Improvements in ventilating devices
IPC: F24F7/06
Filed: 1937-08-19
Abstract: 480,305. Apparatus for ventilating rooms. KURTH, F. J. Aug. 19, 1937, No. 22788. Convention date, Aug. 20, 1936. [Class 137] A device for supplying heated air to enclosures comprises an air conduit 1, in which is mounted a fan 9 which draws fresh air through a screened inlet 4, and filter 12, and delivers it through a set of concentric frustoconical rings 20 to ensure uniform distribution, and through a heater 8 to a distributing body 5. The assembly projects through a roof 2, and is provided with a duct 13 through which recirculated air is drawn a valve 14 in this duct being coupled with a valve 15 in the fresh air conduit to control the proportion of fresh to recirculated air used.
Patent GB-298116-A (GB)
Title: Improvements in or relating to mowing machines
IPC: A01D34/26
Filed: 1927-06-02
Abstract: 298,116. International Harvester Co. of Great Britain, Ltd., (International Harvester Co.). June 2, 1927. Divided on 298,113. Mowing-machines.-Means for enabling the cutting-apparatus to be turned into a vertical position consists of a gag lever pivoted to the main frame above a pivoted coupling arm or equivalent member supporting the cutting- apparatus, the gag lever being adapted to be turned into position to arrest the upward movement of the coupling arm or equivalent member. The gag lever consists of a depending arm 23 carried by a bell-crank pedal lever 24, Fig. 4, pivoted on the main frame 3 above the coupling arm 5. The arm 23 is adjustable in effective length and is normally held in inoperative position by a spring 26. The arm 5 is rockably connected to a yoke 7, Fig. 3, on which is pivoted the shoe 9 of the cutting-apparatus. A pivoted lifting arm 13 is provided with a hand-lever and a foot-lever and is connected by a link 17 to a lever 18 pivoted on the yoke 7. The lever 18 is connected by links 20, 21 to a pull-link 22 pivoted on the shoe 9, which is furnished with a stop pin 28.
Patent GB-1320063-A (GB)
Title: Pregna-4,9-dien-3-ones process for their preparation and compositions incorporating them
IPC: C07D295/215
Filed: 1971-04-19
Abstract: 1320063 19 - Norpregna - 4,9 - dienes ROUSSEL-UCLAF 19 April 1971 [3 March 1970] 22968/71 Heading C2U The invention comprises compounds of formula (wherein R is C 1-4  alkyl and R<SP>1</SP> is H or carboxylic acyl) and their preparation from the corresponding 20-(free hydroxy)-#<SP>5(10)</SP>-monoenes by bromination and dehydrobromination followed when required by 20-acylation. When the product is obtained as a mixture of 20α- and 20#-isomers, the mixture may be resolved chromatographically. The #<SP>5(10)</SP>-starting materials are prepared in the case of the 13-(C 2-4  alkyl) compounds, as described in Specification 1,320,064. The 13- methyl compounds are prepared analogously. The inventive compounds are said to possess anti-ovulatory, progestomimetic and " hypophysiary inhibiting (anti-LH) " activities, and may be made up with carriers into pharmaceutical compositions for oral, parenteral and rectal administration.
Patent GB-921158-A (GB)
Title: Improvements in machines for cutting wool from wool-covered skins
IPC: C14B1/02
Filed: 1959-07-03
Abstract: 921,158. Apparatus for removing hair from skins. F. DALE, and S. DALE. July 3, 1959 [July 8, 1958], No. 23016/59. Class 76. In a machine for cutting a desired depth of hair from hair-covered skins, e.g. sheep skins, the skin is first engaged by a comb 49 which delivers it to a belt-type conveyer 31 which carries it beneath a continuously moving or oscillating cutting blade 38 running transversely of the conveyer. The base of the machine comprises a long horizontal channel member 9 (Fig. 1) and rearwardly extending channels 10 (Fig. 7). Pairs of vertical channels 12 are secured to the channels 10 adjacent the channel 9 and short vertical channels 13 are similarly secured to the opposite ends of the channels 10. Between these sets of vertical channels is mounted a vertically displaceable box-frame 14. The machine is operated by a pedal 30 which, when depressed, forces frame 14 down against the action of springs 25. The pedal is pivoted at 28 and vertical tie-rods 29 secure the frame 14 to the pedal 27. Stops 26 adjustably bearing against pins 21 limit the upward movement of the pedal. The rotary comb 49 is provided with a series of pins or bristles arranged on a belt 51, the lower run of the comb being movable along the upper run of the conveyer. The comb is driven from the conveyer by chain drives and spur gearing 55. The conveyer is mounted on rollers 32, 33, 34, roller 34 being driven by a chain drive. The cutter 38, which is mounted on a driving pulley 39 and an idler pulley 41, passes transversely directly above the roller 33 carrying the conveyer 31. The distance between the cutter and the conveyer may be adjusted by a stop 26 (Fig. 7) to correspond to the thickness of the hair to be shorn and the layer of the residual hair, if any, to be left on the surface. The cutter band, where it traverses the conveyer 31, is held in place by an adjustable horizontal plate 45 extending over the width of the conveyer. A suction device (Fig. 2, not shown) is mounted beneath the conveyer and serves to draw air upwardly through the skin on the conveyer. Hair shorn off by the cutter blank 38 is guided by a grid 58 associated with the comb 49 over the plate 45 to a container or conveyer. The shorn skin remains on the conveyer until it reaches a receiving hopper. Means for sharpening the cutter band and associated means for cleaning and lubricating the band are provided (Fig. 4, not shown), as well as means to permit the removal of the comb and/or the blade from the conveyer 31. Means for cleaning the lower run of the conveyer may also be provided. The comb 49 may be replaced by oscillating rakes engaging the grid 58.
Patent GB-359595-A (GB)
Title: Improvements in or relating to valve gear for steam engines
IPC: C23C18/31
Filed: 1930-07-30
Abstract: 359,595. Steam engines. HANNOVERSCHE MASCHINENBAU-AKT.-GES., VORM. G. EGESTORFF, Linden, and WICHTENDAHL, R., 18, Adelheidstrasse, both in Hanover, Germany. July 30, 1930, No. 23038. Convention date, Aug. 6, 1929. [Class 122 (ii).] Rotary distributing valves ; Expansion valves.-In a uniflow engine, steam is supplied to each end of the cylinder 1 by pairs of cylindrical, concentrically arranged and uniformly rotating valve 13, 15, 16, 17 through which steam flows radially through diametrically opposed slots which are relatively angularly adjusted to vary the admission. The outer valves 13, 17 are connected to a sleeve 8 which surrounds and is driven by a rotary shaft 7. The inner valves 15, 16 are connected by a sleeve 14 which is relatively rotated with respect to the sleeve 8 by a sleeve 26 engaging a spiral groove 27 thereon and operated by an arm 38 in a shaft 39. Similarly the sleeve 8 is rotated relative to the shaft 7 for reversal. The inlet of steam to and outlet from the valves take place through packing sleeves 31, 36, 31<1>, 36<1>. The passage 37 communicates with the cylinder.
Patent GB-517687-A (GB)
Title: Improvements in and relating to refrigerator cabinets
IPC: F25D11/04
Filed: 1938-08-04
Abstract: 517,687. Refrigerators. MAIURI, G. Aug. 4, 1938, No. 23052. [Class 29] The storage compartment a' of a cabinet adapted particularly for storing already frozen ice cream or other goods is cooled directly by the low temperature evaporator e of an inert gas absorption refrigerating system, while the heat insulation b is surrounded by a wall c cooled by a higher temperature evaporator f to reduce inflow of external heat. The refrigerating system shown is similar to that set forth in Specification 484,945, and in the low-temperature evaporator e ammonia evaporates from strong solution into the inert gas, nitrogen, while in the high-temperature evaporator f liquefied ammonia evaporates into its own vapour. The wall c is preferably also surrounded by heat insulation d. The vessel g for the solid carbon dioxide serving to condense refrigerant vapour in the jacket h is located in the insulation b and a liquor heat exchanger w is embedded in the outer insulation. In place of the above system a condensing inert gas refrigerating system with a two-temperature evaporator may be used.
Patent GB-753455-A (GB)
Title: Improvements in and relating to magnetic materials
Inventor: JAMES JOHN AYLWARD
IPC: C21D8/12
Filed: 1952-09-15
Abstract: 753,455. Electrolytic production of iron sheets. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 26, 1953 [Sept. 15, 1952], No. 23107/52. Class 41. A process of producing a sheet of iron consists in preparing a sheet of metallic substrate material of cubic structure having the majority of its crystals aligned so that two adjacent cube edges lie substantially in the plane of the sheet, electrolytically depositing iron on the substrate using an electrolyte of ferrous chloride at a temperature of not less than 50 C. and a current density of 1 amp/dm<SP>2</SP> until a coating of at least 0.002 inches has been obtained, and separating the coating from the substrate. A substrate of gold may be used, which is first cold rolled and then annealed at 1000 C. for one hour. Substrates of copper, iron, nickel, aluminium, or a nickel-iron alloy containing 50 per cent nickel, may also be used. The iron may be deposited from 600 gms. of FeCl2.4H 2 O per litre of water at a pH of 1.8 and at 70 C. The iron sheet obtained in this way may be used as a " master " for producing further sheets by first electrodepositing silver or tin on the " master" (90 gms. Na 2 SnO3. 3H 2 O and 7.5 gms. NaOH in 1 litre of water at cathode current density of 0.1 amps/dm<SP>2</SP> and at 70 C., with tin anodes, may be used), iron then being electrodeposited on the coating as before. The so-deposited iron sheet is then removed, e.g. by melting the intermediate metal, or in the case of tin, by exposing the sheet to chlorine.