baber/WOPTO huggingface dataset:
Patent GB-617622-A (GB)
Title: Improvements in or relating to electric resistance potentiometers
IPC: H01C10/32
Filed: 1946-05-21
Abstract: 617,622. Electric resistances. STANDARD TELEPHONES & CABLES, Ltd., and CLEAVER, R. F. May 21, 1946, No. 15355. [Class 37] A rotary electric potential divider with a central rotating circular member has its resistance element so graded as to be electrically equivalent to the potential divider of polygonal form described in Specification 602,979. In an embodiment a circular resistance element 1, Fig. 1, with equally-spaced terminals 2-7 has insulated contact members 8, 9 rotating about O, and connected to terminals 11 and 12. The equivalent hexagonal-shaped potentiometer is indicated by dotted lines. Considering one resistance portion A, B, the resistance of the circular arc portion and the resistance of the straight portion between the point A and any intermediate position of member 8 are equal. The resistance may consist of resistance wire wound on a flat annular disc with one circular and one scolloped edge, or in the form of a thin cylinder with one scolloped edge, Fig. 3. Alternatively, it may be a hollow cylinder, Fig. 7, of solid resistance material, such as carbon, having a number of flutes, the terminals being connected as at 23.
Patent GB-580897-A (GB)
Title: Suported catalyst
IPC: B01J37/02
Filed: 1944-08-11
Abstract: A compound of a platinum group metal is hydrolysed in aqueous solution in the presence of an anhydrous oxide of a non-precious element taken from Groups III to VIII; upon which platinum metal oxide is thereby deposited, and the latter is then reduced to metal. The preferred carrier is alumina; oxides of chromium, zirconium, iron and silicon are also mentioned.  The hydrolysable salt may be, e.g., potassium tetrachloroplatinate, the sodium salt of tetrachloropalidic acid, or rhodium chloride.  The hydrolysis is effected by boiling the mixture, but except when the carrier is alumina it is desirable also to add some alkali such as sodium bicarbonate.
Patent GB-378567-A (GB)
Title: Improvements in or relating to braking devices particularly applicable to electric switches
IPC: H01H3/60
Filed: 1931-05-26
Abstract: 378,567. Electrically-tripped switches. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, TURNER, H. C. and ALDRED, L., of Salford Electrical Instruments, Silk Street, Salford, Lancashire. May 26, 1931, No. 15410. [Class 38 (v).] To absorb the momentum of the movable part of a circuit-breaker as it reaches the open position, a one-way brake is provided. The movable contact-carrier 6 carries a spring plate 2 and is linked to a lever 5 having a fixed pivot 17 and a rotary member 1 pivoted thereto at 19. Fig. 1 shows the braking action. In the closed position, the parts 1, 2 are separated, the part 1 hanging by gravity against a stop 18 on the lever 5. When the breaker opens, the arm 6 rotates counterclockwise about the pivot 7, carrying with it the plate 2; the lever 5 rotates clockwise to bring the part 1 into engagement with the approaching end 11 of the plate 2, which is accordingly bent backwards. The pressure between the parts 1, 2 as the former slides along the latter, produces the braking pressure which holds the part 1 against the stop 18, and the braking pressure is transmitted to the arm 6 both through the plate 2 and the lever 5. A stop 22 may be provided to engage positively the part 1 and arrest the parts. In the closing movement, the plate 2 rotates the member 1 clockwise so that the latter slides down the plate without producing a braking action. In Fig. 3 two members 1 are pivoted at 17 and spring-biased against a stop 18 so that, as the member 23 moves downwards to open, an equal braking force is produced by two spring plates 2. As the member 23 moves upwards in closing, the springs rotate the members 1 against the action of their springs 25 away from the stop 18 to remove the braking force.
Patent GB-1298306-A (GB)
Title: Recovery of hydrocarbons from subterranean hydrocarbon-bearing formations
Inventor: FEUERBACHER DAVID GEORGE
IPC: C09K8/58
Filed: 1971-05-18
Abstract: 1298306 Extracting oils from sand TEXACO DEVELOPMENT CORP 18 May 1971 15418/71 Heading C5E [Also in Division E1] Oil is extracted from tar sands by washing the mined sand with an aqueous alkali metal hydroxide solution containing a low molecular weight alkylamine.
Patent GB-571488-A (GB)
Title: Improvements in and relating to screening apparatus for the removal of insoluble solids from liquids
IPC: B01D33/00
Filed: 1943-09-21
Abstract: 571,488. Straining liquids. DALBY, R. C. C. Sept. 21, 1943, No. 15437. [Class 46] Apparatus for straining and removing solids from trade effluent comprises a rigid sweepcarrying rotor mounted above a screening trough of part cylinder form so that only the lower part of the rotor depends into the trough. The screen 17 is mounted in a trough 11 also of part cylinder form into which the trade effluent enters by a pipe connection 15 and the strained liquid passes away by an opening in the bottom of the trough to a drainway 16 in the concrete channel 10 in which the apparatus is located. Sweeping and collecting blades 28 move over the interior (upper) surface of the screen 17 whereby the solids strained from the liquid in its passage through The screen are elevated and subsequently fall off into a shoot 32 located within the path of the blades 28. The solids are delivered from the shoot 32 by a laterally extending passageway 33 provided with a conveyor worm. The sweeping blades 28 shown to an enlarged scale in Fig. 3, extend axially from radial arms 20 on a gear wheel 22 mounted on the trough 11 by a bearing 19 concentrically with the screen 17 but at the side thereof and are provided with an adjustable india rubber sweeping edge and side ears 26. The remote ends of the blades are braced by arms 31. The gear wheel 22 is driven from the shaft 24 of the conveyer worm which is in turn driven by an electric motor 38 through reduction gearing 39.
Patent GB-1438067-A (GB)
Title: Fibres and processing thereof
IPC: D01F1/10
Filed: 1974-04-08
Abstract: 1438067 Impregnating filaments E I DU PONT DE NEMOURS & CO 8 April 1974 [9 April 1973 26 July 1973] 15463/74 Heading B5B [Also in Division D1] Fibres are made from synthetic linear organic polymers having nitrogen linking atoms in the molecular by wet- or dry-spinning a solution of the polymer in a water-miscible solvent. The nascent fibres are then contacted with an aqueous bath in order to remove substantially all of the residual solvent and to swell the fibres so that they contain at least 50 wt. per cent water. In this state the fibres are brought into contact with an aqueous solution of the required impregnant which thus diffuses into the fibres. The fibres are removed and dried, optionally with heating or crimping. The polymers are restricted to those that can only be melt-spun with difficulty by reason of a high melting point or instability. In the Examples (1), poly-(metaphenylene isophthalamide) is formed into fibres by dryspinning and impregnated with tetrakis hydroxymethyl phosphonium chloride fire retardant plus a melamine formaldehyde resin and magnesium or ammonium chloride; (2) poly- (p-phenylene terephthalamide) is wet-spun and impregnated with the same mixed with either metamine formaldehyde resin or quanidine magnesium phosphate hexahydrate or magnesium ammonium phosphate hexahydrate plus the resin; (3) polyoxadiazole is wet-spun and impregnated with the above fire retardant plus melamine formaldehyde resin and ammonium chloride; and (4) poly-(metaphenylene isophthalamide is dry-spun and impregnated with polyethylene laurate. This last prevents the collapse of the structure of the fibres during drying and thus facilitates dyeing. Heating the impregnated fibres (1), (2) and (3) causes the impregnant to cross-link in the fibre.
Patent GB-219459-A (GB)
Title: Improvements in or relating to knitting machines
IPC: D04B7/28
Filed: 1923-06-14
Abstract: 219,459. Wildt & Co., Ltd., and Walker, F. W. June 14, 1923. Circular machines; straight-bar machines.- Relates to means for producing, on a circular or flat knitting-machine, patterned fabric, such as by means of tuck or miss stitches or by coloured yarns &c. According to the invention, there is employed, in association with each patterning needle, a disc, wheel or other rotary member having irregular peripheral teeth &c. for actuating the needle for knitting or patterning purposes, the rotary members being rotated intermittently by means put into or out of action automatically by pattern-controlling devices. In Fig. 1 the patterning rotary discs &c. 1 are supported on a member 8 rotating with the needle cylinder 2 and are rotated intermittently by a switch cam 18 carried by the stationary housing 13 and engaging gaps 16 in the discs &c. 1. The housing 13 has a guide-ring 26 with which the gaps 16 engage after leaving the cam 18 which is operated by a slide 22 shogged by pattern mechanism. In a flat knitting machine the discs &c. 1 are operated by an inclined cam or cams moving with the yarn carrier. The discs &c. 1 are interchangeable for varying the pattern and are adapted for removal where not required. The housing 13 is preferably formed in sections for easy access to the members 1. The non-patterning needles are similarly operated by rotary members 1 having regular teeth so that the needles always clear. The needles are returned by the usual stitch cam or cams, all other cams in the cam-box being moved to inoperative positions by hand.
Patent GB-1134581-A (GB)
Title: Improved antichecking wax for rubber
IPC: C08L21/00
Filed: 1967-04-05
Abstract: 1,134,581. Rubber compositions. SUN OIL CO. 5 April, 1967 [20 April, 1966], No. 15538/67. Headings C3P and C3Q. A composition comprises 100 parts by weight of rubber and 1-30 parts by weight of a composition comprising 70-99% by weight of paraffin wax melting in the range of 120- 138‹ F. and 30-1% of ethylene-vinyl acetate copolymer containing 1-60 weight per cent copolymerized vinyl acetate.
Patent GB-1381655-A (GB)
Title: Cheese flavour amino acids
IPC: A23L27/21
Filed: 1972-04-05
Abstract: 1381655 Cheese flavour UNILEVER Ltd 5 April 1972 [8 April 1971] 15594/72 Heading A2B Foodstuffs, for example cheeses, having a ripe cheese flavour, which flavour may have been introduced enzymatically or by admixture of a cheese flavouring composition, have additionally admixed therewith at least three amino acids, or thin salts, selected from glutamic acid, methionine, lycine, and glycine and/ or alanine and/or proline, the amount of glutamic acid added being 26-52 wt%, the amount of lysine added being 8-52 wt%, the amount of methionine added being 0-30 wt%, and the amount of glycine and/or alanine and/or proline added being 0-50 wt%, based on the total amount of free amino acids admixed with the food composition. Preferably the amounts of amino acids employed are such that at least one of the above named amino acids is present in a concentration of at least twice that of any other not named free amino acid.
Patent GB-737719-A (GB)
Title: Improvements in devices for testing the hardness of materials
Inventor: VINYCOMB WILLIAM ANTHONY
IPC: G01N3/48
Filed: 1953-06-08
Abstract: 737,719. Testing hardness of materials. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 23, 1954 [June 8, 1953], No. 15740/53. Class 106 (2). A device for testing the hardness of timber &c. of the kind in which a penetrator is driven by blows of equal strength to a given depth in the material, the number of blows being a measure of the hardness, has means to prevent further blows being struck when the depth is reached. The penetrator, comprising a series of spikes 11, is placed against the material and the barrel 1 of the device pressed inwardly against a spring 8 contained between a hammer 4 and end closure 7. A plunger 6, moving with the barrel, passes down a bore 5 in the hammer to engage a transversely slidable locking element 17 to bring a bore 19 in it, into alignment with the bore 5. This permits the hammer 4 to slide along a shaft 9 integral with the penetrator, under the influence of the spring 8 and deliver a blow on a collar 13 to drive the penetrator into the material. The barrel is then returned to the position shown by a spring 14 and the element 17 is impelled by a spring 20 into the locking position. The penetrator carries an axially slidable stop 23 to which is secured a collar 26, and as the spikes penetrate deeper so the collar 26 approaches the barrel and restricts its forward travel. When the desired penetration has been achieved the barrel's travel is so restricted that the plunger 6 is unable to release the element 17 and the hammer remains ineffective. Adjustments are obtained by fitting members 23 of various lengths and arranging washers 27 behind the head 6b of the plunger 6.
Patent GB-1337711-A (GB)
Title: Latch knitting machine needle
IPC: B21G1/04
Filed: 1972-04-05
Abstract: 1337711 Knitting-machines: latch needles NORTH AMERICAN ROCKWELL CORP 5 April 1972 [22 June 1971] 15761/72 Heading D1C A latch needle includes a latch bearing comprising tabs 21, 22 pressed from the side walls 14, 15 of the needle shank. The outer circumference 40 of each tab lies below the outer surface of the associated shank wall. Terminal parts 25, 28 of the tabs, having walls parallel to the shank walls are disposed entirely within the latch slot 16, which is wider than the shank walls: The terminal parts provide bearing surfaces of a predetermined arcuate extent. Root portions 24, 27 of the tabs are sunk below the shank walls and provide further bearing surfaces 46.
Patent GB-544944-A (GB)
Title: Improvements in and relating to coated regenerated cellulose sheets or films
IPC: C09J115/00
Filed: 1940-10-30
Abstract: 544,944. Coating compositions. BRITISH CELLOPHANE, Ltd. Oct. 30', 1940, No. 15866. Convention date, Nov: 1, 1939. [Class 95] [Also in Groups VIII and V] Sheets or films of regenerated cellulose are adhered to materials such as regenerated cellulose, cellulose nitrate or acetate, paper, cardboard, cloth or metal by a composition comprising phenol-modified rubber of the kind described in U.S.A. Specification 2,158,530. Natural or synthetic resins, e.g. rosin, hydrogenated rosin or its derivatives such as hydrogenated methyl abietate, ester gum, gum dammar, coumarone and indene resins, alkyl resins ; plasticizers, e.g. dibutyl phthalate, tricresyl phosphate, chlorinated paraffin wax, chlorinated diphenyl, dixylyl ethane and hydrocarbon oils; antioxidants. e.g. catechol and benzyl-p-aminophenol; dyes and pigments may be added. The adhesive composition may be coated on regenerated cellulose sheets or used as an anchoring layer between a regenerated cellulose base and a pressure-sensitive adhesive. The composition may be applied molten or in solution or as an emulsion. Suitable solvents include benzene, toluene, ethylene dichloride, acetone and ethylene glycol monomethyl ether. Emulsions may be made by emulsifying organic solvent solutions in water containing wetting agents such as salts of alkyl sulphates. Applications of the invention include sticking labels to regenerated cellulose sheets, sealing regenerated cellulose wrappings and making bags from regenerated cellulose film.
Patent GB-679371-A (GB)
Title: Valve-circuit arrangement for producing an output voltage which varies a plurality of times during the period of variation of an input voltage
Inventor: OBERMAN ROELOF MAARTEN MARIE
IPC: H04B14/04
Filed: 1949-06-14
Abstract: 679,371. Current and voltage measuring. STAATSBEDRIJF DER POSTERIJEN TELEGRAFIE EN TELEFONIE. June 14, 1949 [June 15, 1948], No. 15868/49. Class 37. [Also in Group XL (c)] Fig. 1 shows a circuit which functions as a scale multiplier for a valve voltmeter in which a linearly increasing voltage is applied to the input terminals a2, a3 of an amplifier stage Ba1 which is coupled to a second stage Ba2. The anode load of valve Ba2 is connected to the screen grid circuit of valve Ba1 and the output voltage is derived from terminals a6, a7. Initially, valve Ba2 is conducting until as the voltage at the input a2, a3 increases, the point is reached at which valve Ba2 is cut off and the increase in voltage applied to the screen-grid of valve Ba1 produces a sudden rise in its anode current, Fig. 2a. The voltage Vu at the output which is contributed in part by the outputs of both valves Ba1, Ba2 thus has the sawtooth wave-shape shown in Fig. 2c and has twice the repetition frequency of the input voltage. In a modification shown in Fig. 4, the output voltage at a6, a7 has the same phase as the input voltage Vi. The multiplier is more stable than that shown in Fig. 1, the input voltage being applied to an amplifier stage Ba1 which feeds a phase inverter stage Ba4 and also two stages Ba2, Ba3 which are cross-connected similarly to valves Ba1, Ba2 of Fig. 1. The circuit of Fig. 4 may be made n partite by connecting the anode of valve Bal to the voltage source V2 via n potentiometers, the taps on n-1 of which are connected to the control grids of n-1 valves Ba2 which are coupled to n-1 valves Ba3, each of which is connected to the output a6, a7. A modification in which n=3 is described, Fig. 7 (not shown). m similar units may be connected in cascade so that a frequency multiplication of n<SP>m</SP> times is obtained, the meter being placed in the anode circuit of the terminal valve.
Patent GB-1126374-A (GB)
Title: Improvements in or relating to securing machines
Inventor: GILBERT BARRIE WILFRID
IPC: B25B27/10
Filed: 1966-04-12
Abstract: 1,126,374. Jointing by stamping. BIRFIELD ENG. Ltd. 12 April, 1967 [12 April, 1966], No. 15880/66. Heading B3Q. A machine for securing a clip 1 with interlocked ends 2 around a component 7 comprises jaws 10 for tightening the clip about the component 7, and a punch 16 movable at right angles to the direction of jaw-movement for flattening the interlocked ends upon withdrawal of the jaws. As applied to securing a sealing boot 7 to the outer body of a constant velocity universal joint by means of a clip 1 which has a dovetail loop 3 opposite the interlocked, dovetail ends 2, corners 12 on the jaws 10 tighten the clip by engaging the dovetails 2, 3. When the jaws withdraw, the clip is held by spring-pressed clamps 20 while the dovetails 2, 3 are flattened by opposed punches 16. The jaws may be operated by pneumatic cylinders 13 or, as shown, they may be interconnected by toggle links 14 for operation by a single cylinder 13. Opposed cylinders 18 operate the punches 16 and bellcrank levers 22, acting between the punches and jaws, hold back the punches until the jaws are sufficiently withdrawn. Cams 26, 27 on one of the jaws 13 operate valves 28, 29 for controlling the punches, and cams 30, 31 on the punches operate valves 32, 33 for controlling the jaws 10. A seating (6), Fig. 2 (not shown), is provided for the body 7 of the universal joint, and the table of the apparatus may be mounted at 45 degrees to the horizontal.
Patent GB-219632-A (GB)
Title: Improvements in or relating to means for raising casings, boring rods or tubes and the like from wells
IPC: E21B19/06
Filed: 1923-04-16
Abstract: 219,632. Marks, E. C. R., (Dunn Manufacturing Co.). April 16, 1923. Hooks, automatic release. -Means for lifting boring rods, tubes or casings from wells, comprising clamping means for the rods &c. and bails or suspension means removably secured to the means, are provided with means readily movable to permit engagement of the bails &c. with the clamping means but thereafter automatically movable to retain the bails &c. in position when a load is being sustained. The clamping device is provided with opposed pairs of arms 4, 5 between which the bails 9 are engaged; weighted members 15, pivoted at 20, engage recesses 14 in the upper arms to hold the bails in position when in use, but on lowering the device to the derrick floor &c. the members 15 are tilted to permit detachment of the bails. The pivot pins 20 may have recangular portions cooperating with an eccentric part of the bore of the member 15 to permit downward movement of the latter, such movement locking the member against pivoting until it is raised.
Patent GB-398607-A (GB)
Title: Improvements in electric discharge devices
IPC: H01J19/38
Filed: 1932-06-06
Abstract: 398,607. Thermionic valves. M-O VALVE, CO., Ltd., Marconi House, Strand, London, SMITHELLS, C. J. and WARREN, G. W., c/o General Electric Co., Wembley, Middlesex. June 6, 1932, No. 15970. [Class 39 (i).] In a valve in which an electrode forms part of the envelope, the internal electrodes are arranged within one part of the external electrode, and the grid is provided with a cooling fin extending into another part forming a cooling chamber. As shown, an indirectly-heated cathode 8 and a grid 3 are mounted within a part 1 of an anode forming an envelope sealed to a foot 2, and the grid has a cooling fin 4 extending into a narrow cooling chamber 5 in the anode. The grid is separated from the anode by mica spacers 6, 7, or short lengths of mica may be inserted between the fin and chamber and the chamber pressed on to the fin. In modifications (a) the grid has two cooling fins extending into the cooling chambers on the anode, (b) the anode is of oval shape with flattened sides, and (c) the cooling chamber is of larger cross section than the part enclosing the electrodes.
Patent GB-594000-A (GB)
Title: Apparatus for use in testing the porosity of a fabric or like material
IPC: G01N15/08
Filed: 1945-06-22
Abstract: 594,000. Testing physical qualities of materials. CARLING, G. W., and BROWN, W. D. June 22, 1945, No. 159S2. [Class 106 (ii)]- [Also in Group VIII] Apparatus for testing the porosity of a fabric comprises a base 1 with a housing 2 within which an arm 3 is pivotally mounted at 4. The base 1 has an opening 5 over which the fabric is placed and through which air under pressure is blown. At the end of the arm 3 a casing is formed within which is slidably mounted a plate 19 from which are suspended two concentric cylinders 25,.26. The plate 19 carries inverted bolts 30, 35 whose heads bear on springs in the cylinders 25, 26. The arm 3 is held in the operative position as shown in Fig. 2 by a spring clip 17. When the operating means, comprising a lever 48, 49, 50 coupled by toggle mechanism to the plate is raised, a rod 60 disengages the clip 17 allowing the arm to be raised. On fully depressing the lever, the lower extension 40 of the cylinder 25 pushes out a rubber ring 46 into the centre of the groove 45, thus tensioning the material which is finally clamped in this position by the extension 41 of the cylinder 26. To prevent inadvertent release of the operating lever, the arms 49, 50 are provided with spring-urged balls.