baber/WOPTO huggingface dataset:
Patent GB-1510131-A (GB)
Title: Preparation and purification of cellulose ethers
IPC: C08B11/00
Filed: 1975-06-25
Abstract: 1510131 Cross-linked polysaccharide ethers DOW CHEMICAL CO 25 June 1975 [26 June 1974] 27003/75 Headings C3A and C3U Cross-linked ethers of starch or cellulose are obtained by reacting the sodium or potassium polysaccharide with an appropriate etherifying reagent in the presence of a liquid organic diluent at a temperature of from 50 to 155 C. and then neutralizing excess alkali, cross-linking the polysaccharide ether and washing it with water. The etherifying reagent is at least one of a C1-C4 alkyl monochloride, a C2-C4 vicinal epoxide and a C2-C4 monochlorocarboxylic acid or alkali metal salt thereof. The organic diluent is formed from 20 to 100% by weight of a hydrocarbon of boiling point 60 to 155 C. and 0 to 80% of a C3-C6 ketone or a C3-C6 secondary or tertiary monohydric alcohol. The diluent must form an azeotrope with water and be present to a weight of from 8 to 14 times that of the polysaccharide. A characteristic of the process is the removal of water and at least some of the water-soluble and volatile hydroxyl-containing components of the neutralization mixture by azeotropic distillation with the diluent. The preferred cross-linking reagent is glyoxal. The examples illustrate the production of the following cross-linked cellulose ethers: methylhydroxyethyl, methyl 2-hydroxypropyl and hydroxyethyl.
Patent GB-772219-A (GB)
Title: Injection solutions containing pyridine carboxylic acid n-hydroxymethyl-amides
Filed: 1955-09-21
Abstract: Injection solutions of N - hydroxymethyl pyridine carboxylic acid amides substantially free of formaldehyde contain a hexose ureide especially glucose ureide in a quantity not exceeding 15 per cent by weight and preferably in a range 8 to 15 per cent. Specified amides are N-hydroxymethyl nicotinic acid amide and N-hydroxymethyl isonicotinic acid amide.  A citrate buffer may be present.
Patent GB-1006510-A (GB)
Title: Treatment of wood
IPC: G03B27/52
Filed: 1962-07-13
Abstract: The discoloration of Rhodesian Teakwood by sunlight or UV light is reduced by treating the wood successively with an aqueous alkaline solution at its boiling point, with an aqueous acid solution at room temperature, and with an impregnant solution of a UV absorber or a light stable dye at a temperature of 50-78 DEG C. Each treatment step may be carried out with the use of vacuum and/or pressure.  The wood may have previously been degassed. The wood may be washed after the alkaline treatment and also after the acid treatment.  The alkali may be an alkali metal, calcium, or barium hydroxide or ammonia, the concentration 0.5-10%, and the time of treatment 10-30 min.  The alkaline solution may contain a surface active agent.  The acid may be hydrochloric or acetic acid, the concentration 0.2 or 2 N, and the time of treatment 10-15 min.  A 10% solution of impregnant in methanol or ethanol may be employed for 10-15 min.  The impregnant solution may contain an anti-oxidant.  The impregnant may be 2-hydroxy-4-methoxybenzophenone, phenylsalicylate, 2(2-hydroxy-51-methylphenyl)benzotriazole (Tinuvin P), or Sudan Orange G.  The anti-oxidant may be 2, 2-methylene-bis(4-methyl-tert-butylphenol) or 2, 6-di-tert-butyl-p-cresol.
Patent GB-1007533-A (GB)
Title: Apparatus for separating and positioning a supply of articles
IPC: B65G47/32
Filed: 1962-07-13
Abstract: 1,007,533. Conveyers. SCHWEIZERISCHE INDUSTRIE-GES. July 13, 1962 [July 17, 1961], No. 27083/62. Heading B8A. A conveyer system in which articles 1 are fed in line along a reciprocating plate conveyer 3 at the end of which they are discharged singly by pushers 16, 18 incorporates a movable stop 10 which temporarily impedes the movement of the rest of the line while the end articles are being moved into discharge position. This stop is biased to an inoperative position and is released for operative movement by engagement with the articles themselves. The conveyer 3 is driven at 5 by a crank system (not shown) which ensures slow forward and quick return movements of the conveyer surface in its own plane, so that the articles are jigged along it. The stop 10 includes a forked article support 7 which, when the stop is pivoted upwardly into the position shown, lifts the leading article 1 to block the flow on conveyer 3. When the stop is returned to its inoperative position (with the support 7 parallel to the surface of conveyer 3) the end 12a of spring-loaded lever 12 engages the L-shaped recess in the fixed stop 13 and further movement of the stop is thereby prevented until the leading article on support 7 has been advanced sufficiently to deflect lever 12 against its spring 14. Each operation of the stop is accompanied by a cyclic movement, indicated at 17, of the carrier 16 which thus moves article 1a into position 1b and article 1b into a position (not shown) on the head of pusher 18 but still in the original conveyer plane. Final discharge is by raising this pusher into the position 1c.
Patent GB-757778-A (GB)
Title: Method for the manufacture of porous building materials
IPC: C04B38/02
Filed: 1954-09-20
Abstract: Porous concrete, light artificial stone or other porous building material is prepared by adding to a mass made plastic with water and hardenable hydraulically a gas or a volatile substance under conditions of temperature and pressure such that the latter will be dissolved in the water in the plastic mass, whereafter the said conditions are altered so that the gas is released or the volatile substance vaporized to expand the plastic mass to render it porous, whereafter the porous mass is allowed to harden.  The gas dissolved may comprise nitrous oxide, ammonia, or in cases where the plastic mass is not alkaline, carbon dioxide, or any mixture thereof, and the volatile substance may comprise a mixture of ethylamine and ethyl ether.  The vaporization of the volatile substance may be effected by an exothermic reaction such as the slaking of lime.  In order that the material may set slowly a viscosity increasing agent such as an alkali alginate, or polyvinyl alcohol, or a foam stabilizing agent such as saponin may be added thereto.  Also a setting agent may be added.  Porous concrete is prepared by dissolving a gas at a pressure not greater than 11 atmospheres absolute in a plastic mass of water and a calciferous hydraulic binder.  In one example a light artificial stone is prepared by mixing 1500 grams of plaster with 0.95 litres of water and 50 ccs. of 1.5 per cent solution of sodium alginate (thickening agent) and up to about 1 per cent potassium sulphate (rapid setting agent), at about 20 DEG C., and nitrous oxide introduced under an absolute pressure of 2.5 kilograms per square centimetre until no more is absorbed by the mass.  The mixture is then poured into moulds with simultaneous release of nitrous oxide and expansion, and is then set.
Patent GB-1397177-A (GB)
Title: Self-loading pistol with a stock
IPC: F41C23/12
Filed: 1973-06-07
Abstract: 1397177 Pistol with single- or multiple-shot firing HECKLER & KOCH GmbH 7 June 1973 [23 June 1972] 27161/73 Heading F3C A self-loading pistol has a trigger mechanism, which is changed from single shot to multiple shot firing by a switch 37, and has a detachable stock in which is located a control member actuated by the switch for such a change and a rounds counter comprising a control lever 46, projecting from the upper side of the stock and actuated by the pistol breech mechanism during recoil, a toothed member 42 controlled by the lever held by a spring-loaded lock pawl 61 in successive positions until an end position whereby it returns the control member to the single shot position to interrupt the firing sequence, the trigger mechanism, during trigger actuation, keeping a further control member in the stock in a position to allow the pawl freedom to engage the toothed member. For single shot firing, entrainment means 16 engage a part 21 of a firing pin 22 to retract it against a spring by trigger arms 15, until the means 16 is depressed by a pin 14 to release the firing pin for firing. In the detachable stock, Fig. 5, the drum switch 37, actuated from outside by a blade, has a pin 39, which, for single shot firing holds the control member in the form of a spindle 34 rightwardly against a spring 36 which in turn, allows a spindle 26 to be spring biased to hold a pawl 24 from engagement with the firing pin 22. Upon switch changeover, the pawl 24 is spring biased clockwise, and upon trigger movement, an elbow 32 of the trigger arms 15 moves to allow pawl movement into engagement with the pin 22; operation of the pawl 24 in conjunction with a cam surface of a sliding breach produces continuous firing as long as the trigger is depressed. To limit the number of shots fired in a multiple shot burst, the lever 46 is depressed at each shot by the breech recoil, this causing a pivoted pawl 53 to engage a tooth 70 of the toothed member 42 in the form of a ratchet wheel, the wheel, after such engagement, moving clockwise and then being held by a locking pawl 61. For a three shot burst, the wheel 42 has two teeth 70, 71 for movement and upon the second movement, a pin 73 thereon engages the spindle 34 to cease actuation of the pawl 24 to effectively produce a final single shot to end the burst. Alternatively, release of the trigger causes the arms 15 to operate a member 67 in the stock to release the looking pawl 61 from the wheel 42 to return the stock parts to their original positions. Upon further trigger actuation the stock parts are again actuated to produce the required multiple shot burst. The stock is attached to the gun by T-bolts.
Patent GB-1375269-A (GB)
IPC: C30B19/00
Filed: 1972-06-09
Abstract: 1375269 Semi-conductor devices RCA CORPORATION 9 June 1972 [18 June 1971] 27194/72 Heading H1K A semi-conductor structure is formed with an epitaxial layer having its free surface smooth and flat by depositing the epitaxial layer by liquid phase epitaxy, depositing on the epitaxial layer an additional layer of semiconductor material, also by liquid phase epitaxy, and removing all the additional layer with an etchant which does not etch the epitaxiallayer. A light emitting diode may be produced having an N-type gallium arsenide substrate and two P-type epitaxial layers formed from the liquid phase, the upper epitaxial layer being of GaAs. The additional layer may be of Ga 1-x Al x As where x >0À3, and this layer may be etched with hydrochloric acid, which does not attack GaAs or Ga 1-x Al x As where x <0À3, which forms the lower epitaxial layer. The surface of the epitaxial layer exposed by etching is particularly suitable for contact with a heat sink. P-conductivity type may be achieved using a zinc dopant in the liquid phase. As an alternative, the upper epitaxial layer may be of Ga 1-x Al x As where x <0À3.
Patent GB-408240-A (GB)
Title: Improvements in imparting a matte finish to artificial silk
IPC: D06M11/46
Filed: 1932-09-30
Abstract: A matte finish is imparted to artificial silks by depositing within the fibres colourless, insoluble stannates, insoluble in water and washing solutions.  The fibres or fabrics are impregnated at 20--60 DEG  C. with an aqueous solution of a soluble metal salt, oxide or hydroxide, which will form a colourless insoluble stannate, followed by an aqueous solution of an alkali stannate or in reverse order, or with a preparation containing the two components and an organic compound containing a plurality of hydroxy groups such as sugar or glycerine.  The treatment may be repeated, and combined with bleaching, dyeing, washing, brightening, sizing and dressing. According to examples viscose is (1) treated with a dilute solution of calcium oxide containing glycerine glucose or cane sugar, at 20--30 DEG  C. followed by a dilute solution of sodium stannate; (2) with sodium stannate solution followed by barium hydroxide or chloride solution; (3) with barium hydroxide followed by sodium stannate; and (4) with aqueous sodium stannate containing beet sugar, and barium hydroxide; (5) cuprammonium artificial silk is treated with aqueous strontium hydroxide followed by potassium stannate; (6) acetate artificial silk is treated with a solution of calcium chloride, sodium stannate and glycerine.  Specifications 329,659, [Class 15 (ii)], and 391,773 are referred to.
Patent GB-686977-A (GB)
Title: Device for determining the dynamic unbalance of wheels
IPC: G01M1/28
Filed: 1950-03-10
Abstract: 686,977. Testing balance of rotary bodies. HUNTER, L. March 10, 1950 [Aug. 11, 1949], No. 27230/51. Divided out of 686,912. Class 106 (ii). A device for use in determining the dynamic unbalance of a rotating wheel comprises a mounting disc 16, Figs. 1, 8, 20 and 21, rigidly securable to the wheel, a housing 19 mounted on the disc 16, a balancing weight in the form of a plate 107, Fig. 20, mounted on the housing 19 and means operable during the rotation of said wheel for radially adjusting the plate 107 relatively to the axis of the wheel and also for rotating the plate 107 with the housing 19 about the axis of the wheel. Four co-axial control knobs 63a, 49a, 39a and 25a, Fig. 8, are connected to the balancing weight 107 through gears in the housing 19 such that by touching the appropriate knobs during the rotation of the wheel to slow down the rotation of those knobs, the desired movements of the plate 107 relatively to the wheel can be obtained until all vibrations vanish. The plate 107 has a slot 108, Fig. 20, the longitudinal edges of which are in different planes so that gear teeth 109 cut in one edge mesh with a gear 61, and gear teeth 110 cut in the other edge mesh with a gear 62. Selective slowing down of the rotation of knobs 49a and 63a moves the plate 107 through these gears radially with respect to the device. The plate 107 is slidably mounted in ways 111 carried by an end wall 9 and is rotated together with the wall 9 about the axis of the wheel by knobs 25a and 39a. A pointer 113, Fig. 22, on an extension 114 of a shaft 57, Fig. 21, points in the same direction as the plate 107 to indicate its direction. A pointer 79, Fig. 8, indicates on a scale 82 the magnitude of the necessary correcting weight. Means are provided for preventing the gears 61 and 62 from reaching the end of their travel in the slot 108, to prevent jamming. The device is secured to the wheel of a car by adjustable arms 84, Fig. 8, which can be forced into engagement with the rim of the wheel. When testing the rear wheel of a car, the car engine is used as the driving force. When testing the front wheels, an auxiliary driving means 123, Fig. 1, pressing against the wheel may be used.
Patent GB-1164771-A (GB)
Title: Synchronized clutch for a vehicle change-speed gear transmission
IPC: F16D23/02
Filed: 1968-06-07
Abstract: 1,164,771. Positive clutches. DR ING L.C.F. PORSCHE K.G. 7 June, 1968 [24 June, 1967], No. 27235/68. Heading F2C. In a split-ring type synchronized clutch the free ends 19, 20 of the ring are bent inwardly so that when it is bent from its preformed elliptical into circular form by engagement with the conical friction surface 24 of shift sleeve 5, the ends of the ring remain clear of the surface 24. The axial shift force may be reduced by providing interengaging conical end surfaces 25, 26 on the ring 13 and engaged clutch member 6 respectively, or by providing balls 28 which engage the end face of the ring 13<SP>1</SP> and are carried in lost-motion recesses (29), Fig. 4 (not shown), in the clutch member 7.
Patent GB-1508327-A (GB)
Title: Varistors
IPC: H01C7/12
Filed: 1975-06-27
Abstract: 1508327 Varistors GENERAL ELECTRIC CO 27 June 1975 [1 July 1974] 27302/75 Heading H1K A multiphase transient voltage suppressor comprises a disc 10 of polycrystalline varistor material having at one face a plurality of grooves 11 dividing the face into lands 15, 16 and of which series an electrode 19, 20, and a single electrode 25 on the other face. The surface path between the opposite edges of each groove 11 is longer than the current path directly through the thickness of the disc 10. Each of the electrodes 19, 20 (of which there are preferably four separated by cruciform grooves) is connected to a lead 23, 24 extending out through plastics encapsulation 26, whereas electrode 25 is not externally connected. Under normal steady state conditions the resistance of disc 10 is of the order of thousands of megohms but a high voltage transient between leads 23, 24 reduces the varistor resistance there. between via two thicknesses of the disc 10 and the electrode 25 to a fraction of an ohm.
Patent GB-255287-A (GB)
Title: Improvements in or relating to metal tiles
IPC: B21D53/00
Filed: 1925-10-30
Abstract: 255,287. Dowdall, J. T., Dowdall, A. E., and Hygienic Wire Works, Ltd. Oct. 30 1925. Sheet-metal tiles.-Sheet-metal tiles, of the type bent up from a blank to form a shallow box-shape, are provided with special means for securing them invisibly to the wall which also serve for detachably interlocking adjacent tiles. Three edges of the metal sheet are folded at right angles to produce plain flanges C, C<1>, and a beaded flange G<1>. The fourth edge is folded to produce a flange of double width, the outer portion of which is beaded and interrupted. The centre D<1> of this outer part is perforated at E to receive fixing nails, while the end portions D are bent back on themselves to form a U-shaped channel into which the flange G<1> of the adjacent tile fits and interlocks.
Patent GB-502009-A (GB)
Title: Improvements relating to means for steadying liquid in tableware and like open drinking vessels
IPC: A47G19/22
Filed: 1938-09-19
Abstract: 502,009. Drinking- - vessels ; dishes. BALDWIN, E. A. Sept. 19, 1938, No. 273,13. Convention date, Sept. 21, 1937. [Class 128] A device for steadying liquid in cups, dishes, &c. comprises two or more plates which are, secured together as by brazing, soldering or halved joints to form. baffles in angularly related vertical planes, and positioned within the vessel. The structure 10, 11 may be supported by resilient members engaging thesides of the vessel, or by means of hooks 14 extending over the edges. The top edges of the plates may be bevelled and recessed, and the bottom of the plates may have recesses or apertures to permit circulation of liquid. The structure may be of metal, paper or papier mÔchÚ.
Patent GB-1139782-A (GB)
Title: Improved brake motor
IPC: F16D65/22
Filed: 1967-06-13
Abstract: 1,139,782. Hydraulic brakes. MIDLAND ROSS CORP. 13 June, 1967 [27 June, 1966], No. 27318/67. Headings F2E and F2F. In a brake motor comprising a cylinder 15, a power piston 30 located therein, sealing means 33 between cylinder and power piston, a floating piston 32 located in the cylinder adjacent to one end of the power piston, and means for introducing operating fluid under pressure between the floating and power pistons, an annular space 42 is provided between the floating piston 32 and cylinder 15. Sealing means 40, 41 are located on opposite sides of the annular space 42 to prevent entry of fluid into the space and a vent 43 is provided communicating with the annular space, whereby fluid entering the space upon failure of a sealing means 40, 41 on a side of the annular space will be vented from the cylinder. As shown, a second power piston 31 is located on the other side of the floating piston 32, having sealing means 34 operating fluid under pressure being introduced between the power piston and floating piston 32, the arrangement being used with a dual-chamber brake master cylinder transmitting two separate and independent fluid pressures to the brake motors for each wheel of a vehicle. Vent 43 is normally sealed by means of an elastic ball 45.
Patent GB-483050-A (GB)
Title: Method of controlling the discharge current of electron valves
IPC: H01J19/00
Filed: 1936-10-08
Abstract: 483,050. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Oct. 8, 1936, No. 27351. Convention date, Oct. 8, 1935. [Class 39 (i)] The intensity control field is applied at a region where the electron velocity is high, and there is applied an auxiliary field causing the electrons to move obliquely with respect to the equipotential surfaces due to the anode potential. Electrons, which do not penetrate the control field are collected by an auxiliary electrode. The arrangement permits of operating a valve with a positive control grid. As shown a cathode K is surrounded by an accelerating electrode 1, and two rods 4 at cathode potential break up the stream into beams. The electrode 1<1> is at the potential of the grid 1. The anode (not shown) is situated behind the control grid 2. In a modification the electrodes, and therefore the equipotential field are curved. To obtain a steep characteristic, the electron paths should all cut the equipotential field at the same angle. Specification 442,196 is referred to.
Patent GB-449236-A (GB)
Title: Improvements in gun mountings especially suitable for use on aircraft
IPC: F41A27/30
Filed: 1934-09-24
Abstract: 449,236. Gun mountings. VICKERS (AVIATION), Ltd., and WALLIS, B. N., Weybridge Works, Byfleet Road, Weybridge, Surrey. Sept. 24, 1934, No. 27359. [Class 92 (i)] Relates to gun mountings, more particularly for aircraft, of the type in which a spring- balanced arm 7, Fig. 2, carries at its outer end a universal support for a gun 8, the arm being mounted on an axle 15, carried by a rotary head at the top of a pillar 6. Such mountings have previously been provided with separate springs for counter-balancing the gun for applying the fixing means for the rotary head and for applying the means for fixing the axle in relation to the pillar. According to the invention, a spring 10 provided for balancing the arm and gun also applies the means for fixing the rotary head to the pillar except when released by the gunner. The same spring may also apply releasable retaining mechanism for the axle. In the form shown, the arm 7, on moving from the upper extreme position shown in Fig. 2 to the lower extreme position shown in Fig. 3, compresses the spring 10 by means of a sector plate 14 fast with the axle 15 and a chain 12 connected to the lower end of the spring. The axle is supported in the forked upper end 16 of a tube 9 which houses the spring and is rotatably carried on a thrust bearing 39 in the pillar 6 to form the rotary head. The upper end of the spring presses together the plates of a friction clutch 27 for fixing the rotary head and the pressure is normally transmitted through screws 29 and sliding pins 30 to the pivoted shoes 23 of a brake for retaining the axle, the shoes engaging with grooves in wheels 20, 21 fast with the axle. A Bowden wire lever 50 on the gun is adapted by a partial movement to release the brake shoes only and by a complete movement to release both the brake shoes and the clutch plates. For this purpose, the Bowden wire 49 acts as shown in Fig. 7 to rotate a shaft 43 carrying cams 42, Fig. 3, for rocking the shoe-carrying levers 31, and cams 51 for operating levers 53 to depress posts 56, Fig. 4, to release the plate clutch.