baber/WOPTO huggingface dataset:
Patent GB-547784-A (GB)
Title: Improvements in or relating to soldering
IPC: B23K35/02
Filed: 1941-08-26
Abstract: 547,784. Soldering. CHASTON, J. C. Aug. 26, 1941, No. 10863. [Class 83 (iv)] A silver solder paste comprises a mixture of silver and copper powders together with a solution containing a flux having a solvent action on copper oxide. The flux, which may consist of alkali borates with or without alkali fluorides, should be less than 10 per cent of the weight of the powders and sufficient water is added to form a thick cream. One mixture may consist of 28.5 parts of copper and 71.5 parts of silver, that is a mixture of the metals in eutectic proportions and melting at the eutectic temperature of 779‹ C., made into a paste with one part of flux by addition of water. The flowing away by capillary attraction of solder from a gap in an assembly being soldered is prevented by using more or less than 28.5 parts of copper, which renders the solder viscous. Thus a paste comprising 35 parts of copper, 65 parts of silver and 1 part of a mixed borate fluoride flux may be used between the copper tubes and end plate of a radiator assembly to prevent gaps during 'furnace brazing in a reducing atmosphere at 805‹ C. The outer surfaces of the tubes and the inner surfaces of the holes in the end plate are previously coated with a thin layer of silver which alloys with the copper to act as a solder at the parts in metal to metal contact. By using a paste having a proportion of copper greater than the latectic proportion, reduction of wall thickness or perforation of the copper of the assembly by further dissolution thereof by the solder is prevented.
Patent GB-873995-A (GB)
Title: Sulfuric acid esters of dextranic acid
Inventor: NOVAK LEO J
IPC: C08B37/02
Filed: 1959-03-31
Abstract: The invention comprises sulphuric acid esters of dextranic acid and salts thereof.  The dextranic acid sulphate may be made by reacting dextranic acid with chlorosulphonic acid or fuming sulphuric acid. In one method dextranic acid is reacted in pyridine with chlorosulphonic acid at temperatures of from 50 DEG -100 DEG C. Alternatively, the dextranic acid is first dissolved p  in formamide and this solution is then added to the chlorosulphonic acid in pyridine solution.  Also, thechlorosulphonic acid may be added at a temperature of -15 DEG -5 DEG C. to the dextranic acid in finely divided form cooled to the same temperature.  Upon completion of esterification, the mixture is poured into cold water, then into alcohol, neutralized with an alkali metal or alkaline earth metal hydroxide to precipitate the salt which is recovered and dissolved in water, the solution is dialyzed and concentrated and the salt is precipitated with methyl or ethyl alcohol.  The free acid of the ester is obtained by acidification of the salt with a mineral acid, followed by dialysis and concentration of the solution. Dextranic acid, used as starting material, is made dissolving native dextran in water together with the dextransplitting enzyme from Aspergillus Wentii and the solution digested at pH 4,3 at 70 DEG F. for 5 1/2 hours.  Isopropanol is added and the supernatant liquid is separated from the precipitate so formed and is treated with sodium hydroxide. The precipitate now formed is dissolved in water, acidified, treated with isopropanol and finally with sodium hydroxide to precipitate dextranic acid.ALSO:A blood anti-coagulant composition consists essentially of an aqueous solution of the sodium salt of a dextranic acid sulphuric acid ester adjusted to pH 7.0.
Patent GB-112740-A (GB)
Title: Improvements in Electric Switches.
Inventor: DRESCHER CARL PETER
IPC: H01H19/28
Filed: 1917-07-28
Abstract: 112,740. Drescher, C. P. July 28, 1917. Switches.-Relates to a switch of the type operated by turning the dome-shaped cover on its axis According to the invention, spring contact arms 13 mounted on a spring 12 seated in the dome-shaped cover 6 make connection with stationary contacts 4. The spring 12 may be held in place by friction, in which case it will slip if the cover is turned :n the wrong direction; it may, however, be fixed and be made strong enough to resist breakage, or a pawl and ratchet device may be employed to prevent reverse movement. Modifications are described with three or more contact arms, and a plurality of fixed contacts, enabling the switch to be arranged as a change-over switch or as a group switch for two circuits. Fig. 5 shows such a switch with three contact arms 13 and three fixed contacts 14, 17, 18; by this arrangement, the circuit through either of the lamps 19, or through both, can be closed by turning the cover to the appropriate position.
Patent GB-331863-A (GB)
Title: Improvements in processes for the preparation of organic articles for electrolytically covering the with a metallic layer
IPC: C25D5/54
Filed: 1929-04-09
Abstract: 331,863. Ainstein, I., (known as Einstein, W. I.). April 9, 1929. Addition to 300,060. Preparing surfaces; metal, depositing.-An article of wood or other organic material is prepared to receive an electrolytic deposit of metal by pulverization by means of a gum with an alloy of easily fusible metals such as lead, antimony, bismuth, tin and zinc, followed by a preliminary electro-plating in a bath at 10-30 C., the main plating operation being carried out in a hot bath. The article may be first dipped in soluble glass and its surface sanded and dried. The first pulverization may be followed by pulverization with copper, bronze or brass.
Patent GB-909652-A (GB)
Title: Improvements in or relating to locks
IPC: E05B9/10
Filed: 1961-03-27
Abstract: 909,652. Locks. VOSS, J., [trading as VOSS KOMM.-GES., JOSEPH]. March 27, 1961 [March 25, 1960], No. 11024/61. Class 44. A double-ended cylinder lock comprises two cylinders 21, 22 each of which, when a key is inserted, turns a toothed rack to operate a sliding bolt 6 which is formed from two parts 6<SP>1</SP>, 6<SP>11</SP> connected together by a screw 10<SP>1</SP>. The key pushes the member 23 into engagement with a groove in the operative cylinder so that as the cylinder is turned the member 23 turns, through a pin 24, a hub 19 having a projecting pin 20 which moves in a groove 17 to engage an abutment member 30 to turn a quadrant rack 15 which operates the bolt. The part 611 of the bolt has a length not greater than the width of the casing for the cylinders and has a groove 12 in which a retaining pin 13 slides. A spring- loaded ball 14 holds the slide bolt in its end positions. The part 6<SP>1</SP> of the bolt has two pins which mate with holes in the part 6<SP>11</SP> and is bored to receive the bolt 10<SP>1</SP> holding the two parts together.
Patent GB-488416-A (GB)
Title: Improvements in or relating to electron-optical lens systems for electron discharge tubes
IPC: H01J29/62
Filed: 1936-12-03
Abstract: 488,416. Electron lenses. ZEITLINE, V., ZEITLINE, A., and KLIATCHKO, V. Dec. 3, 1936, No. 11089. Convention date, May 5, 1936. Divided out of 486,204. [Class 39 (i)] An electron lens in an image intensifier or cathode-ray tube consists of two series of apertured diaphragms D1-D4 and D11-D14, the diaphragms in each series being connected together the two series being interlaced. The diameters of the apertures in the series D1-D4 increase from the photo-sensitive cathode P towards the screen F, while the diameters of the other apertures decrease in the same direction.
Patent GB-245992-A (GB)
Title: Improvements relating to smokers' ash-trays, cigar rests and cigar and cigarette extinguishing devices
IPC: A24F19/10
Filed: 1925-04-29
Abstract: 245,992. Neahr, J. E. April 29, 1925. Ash.trays; cigar rests and cigar and cigarette extinguishers.-A smokers' ash bowl 17 of sheet metal, glass, or ceramic ware is formed with an annular sheet metal support 11 the lower edge of which is turned inwards to form an upturned annular flange 14. A book of matches may be held beneath the bowl 17, its thin edge being thrust between the upper edge 15 of the flange 14 and the base of the bowl. A cigar rest comprising a curved plate 22 is pivoted at 31 to a base plate 24 forming part of a clip 32. The plate 24 is bent upwards at 24<a> and is apertured at 26 by pressing up a portion 27. A cigarette or cigar 25 may be extinguished between the plates 22, 24, the ash falling through the aperture 26 and the member 27 acting as a stop. The plate 22 may be formed with side plates 28. The clip 32 comprises a metallic strip bent to conform with the shape of the tray and engaging, at its lower end 33, an annular recess 34 therein. Side plates 35 on the plate 26 with which the strip 32 is connected are adapted to engage the inside surface of the bowl 17. The flange 14 is provided at its lowest level with drainage holes.
Patent GB-695063-A (GB)
Title: Improvements in or relating to the purification of hydrogen chloride
Inventor: KOPSCH ULRICH
IPC: C01B7/00
Filed: 1951-05-11
Abstract: Hydrogen chloride containing as impurities organic substances with or without chlorine is purified by adding thereto chlorine, hydrogen or a hydrogen-containing gas, and water-vapour, oxygen, and/or air, and effecting combustion of the hydrogen and chlorine.  There is preferably a slight molar excess of hydrogen over chlorine.  In a modification, the contaminated acid is added to the reactants in a commercial process for the production of hydrogen chloride by reaction between a hydrogen-containing gas and chlorine in presence of steam.  Specification 640,444 is referred to.
Patent GB-550667-A (GB)
Title: A mechanical device, relating to brakes and clutches for use on machinery where driving and braking devices are needed
IPC: F16D63/00
Filed: 1941-09-01
Abstract: 550,667. Brakes and clutches. SWIFT, M., (Representative of SWIFT, R.), BURROWS, R. E. and CLARKE, W. Sept. 1, 1941, No. 11140. [Class 80 (ii)] [Also in Group XXXIV] A brake or clutch mechanism comprises a pair of intermeshing gears one of which is mounted freely upon an eccentric. The gear teeth have more top and bottom clearance than is usual. In operation the eccentric is turned by a lever or worm gear so as to force the meshing teeth into deeper mesh so that they become wholly or partially locked with one another. Specification 237,761, [Class 103 (i)], is referred to.
Patent GB-591244-A (GB)
Title: Improvements in and relating to electric lamp bases and sockets
IPC: H01R33/08
Filed: 1945-05-03
Abstract: 591,244. Lamp caps and holders. BRITISH THOMSON-HOUSTON CO., Ltd. May 3, 1945, No. 11249. Convention date, May 3, 1944. [Class 38 (i)] To ease the tolerances in a double-ended tubular lamp 15 of standard overall-length, the lamp pins 26, 27 are unusually long and engage unusually wide contacts 32, 33 in the socket, and a projection 29 on the base 28 abuts against a slotted stud 30, 31 in the socket to prevent longitudinal movement of the lamp. The socket contacts 32, 33 are contained in arcuate slots between the socket sides and the parts 30, 31 into which slots the lamp is rotated after transverse insertion. The lamp may also be used with a standard socket, Fig. 6 (not shown).
Patent GB-1039987-A (GB)
Title: Fluoropyridines
IPC: C07D213/61
Filed: 1964-03-17
Abstract: Fluoro derivatives of pentachloropyridine are prepared by heating pentachloropyridine with anhydrous potassium fluoride, either in a liquid medium or under autogenous pressure, and recovering pentafluoropyridine, 3-chlorotetra-fluoropyridine and 3,5-dichloro-trifluoropyridine as products.  The invention also comprises the last two of the above-named compounds. Examples are given.  Pentachloropyridine is prepared by treating pyridine with phosphorus pentachloride.  Reference has been directed by the Comptroller to Specification 914,933.
Patent GB-227037-A (GB)
Title: Improvements in lubricating pumps
IPC: F16N13/16
Filed: 1924-05-07
Abstract: 227,037. Weir, Ltd., G. & J., and Russell, A. C. May 7, 1924. Actuating by gas pressure; suction and delivery reservoirs; auxiliary values on pump suction and delivery.-The plunger e of a lubricating pump for a steam-driven reciprocating pump is operated by a diaphragm c exposed alternately through the pipa b to the steam and exhaust pressures in the steam cylinder, or to the delivery and suction pressures in the pump barrel. The oil is delivered into a sight chamber m filled with water and floats up a wire guide n and through a valve o to the delivery pipe p. Specification 8156/09 is referred to.
Patent GB-809818-A (GB)
Title: Improvements in or relating to compacting devices for self-propelled scrapers, skimmers and dumpers
IPC: E01C19/26
Filed: 1957-04-05
Abstract: 809,818. Rollers. ETABLISSEMENTS BELINGARD. April 5, 1957 [April 7, 1956], No. 11262/57. Class 6(1). A compacting device for mounting on a self propelled skimmer, scraper or dumper provided with rear driving wheels 4 comprises one or two rollers or a set of heavy tyres mounted on a shaft 8 which is carried by two arms 7 fixed on a shaft 6. The shaft 6 is rotated by two arms 11 connected to two hydraulic cylinders 12 which are used to raise the device clear of the ground for transport purposes.. As shown the rollers are lowered until they contact the driving wheels 4 which are clear of the ground. By engaging a reverse gear the wheels 4 will drive the rollers so that the machine moves in a forward direction. Alternatively the rollers may be driven by a separate chain or power takeoff drive.
Patent GB-789115-A (GB)
Title: Band clips for tubes
IPC: F16L33/12
Filed: 1956-04-14
Abstract: 789,115. Band clips. MORAN, M., [trading as AUTOMATIC SAFETY DEVICES]. June 4, 1956 [April 14, 1956], No. 11410/56. Class 44 A band clip for a tube comprises a band 1 having a tautening and locking lever 3 pivotally mounted or adapted to be pivotally mounted on a first end 2a thereof and threaded through an opening in a second end 2 whereby the lever 3 can be turned about its pivot in a direction away from the band pulling the second end 2 into taut overlapping relationship with the first end 2a, the lever being curved to lie when in the tautened position, around the tube and provided with notches or teeth 5 on its concave edge or face to engage the edge of the hole in the second end 2 and lock the band in the taut position embracing the tube. As shown, the band is in the form of a wire link and the lever 3 is a fiat plate. In modifications, the lever is respectively pivoted to the link by means of a recess formed at that end of the lever, Fig. 8 (not shown,) and is of channel form, Fig. 7 (not shown). In another form Fig. 3 (not shown) the band is a flat springy strip having a slot at one end through which the pivoted end of the lever is passed.
Patent GB-494173-A (GB)
Title: Anaesthetising apparatus
IPC: A61M16/18
Filed: 1937-04-21
Abstract: 494,173. Anaesthetic apparatus. HEIDE, H. C. (Small. T. H.) April 21, 1937, No. 11415. [Class 81 (ii)] Anaesthetic apparatus comprises a vaporizing chamber 10, Fig. 1, having mounted thereon a casing 12 with a central partition 25 providing chambers 29, 36 and carrying a housing 24 for a rotatable air-control valve 32. The valve contains at one end a gravity, or gravity-and-spring operated check inlet valve 37, and has lateral ports 70, 71, registerable with ports 27, 28, opening to the chambers 36, 29. An extension 33 of casing 12 is connected by a flexible tube with a face-piece. With the valve setting shown, air is drawn by the patierit through valves 37 and 32, and through ports 71, 28, thence via a check valve 50 and chamber 29 to the extension 33 ; rotation of valve 32 controllably opens port 27 and closes port 28 thereby passing the air through a port 19, in the base 18 of casing 12, into chamber 10, and through a port 20 and a check valve 31 to the part 33 which acts as a mixing chamber for air and anaesthetic vapour. The chamber 10 contains a domed gauze 75 to increase the evaporating surface and is supplied with liquid anaesthetic, in quantity shown on a gauge 11, through a screw-plugged orifice 23. In a modification valves 50, 31 are replaced by a single hinged valve across the larger end of extension 33. In both constructions the valve casing 24 extends laterally beyond the casing 12 and has a slot with graduations receiving a control lever for the valve 32. Oxygen or carbon dioxide may be supplied from a fitting replacing a plug 34 in extension 33 and comprising a gas capsule 95, Fig. 7, held in a cradle 92 against a packing 93 and perforating pin 94, the gas being released, from a chamber 99 into extension 33 through an orifice 100, by a spring valve 96 controlled by a press knob 98. The face-piece 13, Fig. 8, is of rubber and contains a slidable tube 60 carrying a gauze 61 which may be impregnated with eau-de-Cologne or the like to mask the odour of the anaesthetic. A lateral port 64 in the face-piece fitting houses a spring pressed hinged exhaling valve 62 protected by a plate 67 providing a lateral outlet 68. Instead of a rotatable valve 32 a slide valve or a ported disc valve may be provided.
Patent GB-610681-A (GB)
Title: A new or improved machine for slicing and shredding vegetables and the like
IPC: B26D1/25
Filed: 1946-04-15
Abstract: 610,681. Vegetable slicers. METCALFE, T. April 15, 1946, No. 11466. [Class 28(ii)] [Also in Group I] A hand-operated device for making plain or corrugated slices or for shredding without a change of cutters comprises a rectangular frame with a flexible plate e secured to one end c to lie in the plane of the frame, the inner edge of the plate e forming a knife-edge spaced from the corrugated knife-edge of a similar plate f secured to the opposite end d of the frame. Furthermore the space between the two knife-edges is occupied by a spindle j having two opposite sides flatted with equally spaced knives k mounted perpendicular to the frame on one flatted side. A slot g in each plate increases its flexibility so that it can be deflected out of the plane of the frame by cam members h connected in pairs to handles i. The ends of a U- shaped spring member m pass over the pivots n of the cams h and bear upon flats on the spindle j to hold the spindle in the required operative position. For shredding purposes the spindle j is adjusted so that the knives k are uppermost; the plate e is adjusted by the handle i so that its cutting edge is raised to give the required thickness. One end of a strut is inserted in a slot p in the plate f to engage with the end d of the frame; the opposite end of the strut and end c of the frame form a base for the device so that the frame is inclined at an angle to the vertical. The upper plate f forms a guiding surface down which the material to be cut is pushed through the knives k and on to the cutting edge of the plate e. To produce corrugations in the shredded material the frame is reversed so that the strut engages with a slot p in the cutter plate e, which becomes the guiding surface. When slices are required the spindle j is adjusted so that the knives k are below the frame and its upper surface forms a continuation of the guide surface.
Patent GB-846166-A (GB)
Title: Process for the production of aldehydes
Inventor: MIGNONAC GEORGES
Filed: 1958-04-11
Abstract: The invention comprises a process for the preparation of aldehydes of the benzene or pyridine series by subjecting the corresponding nitrile to hydrogenation in the presence of an aqueous phase maintained at an acid pH and in the presence of a hydrogenation catalyst.  The acid medium may be supplied by means of sulphuric, oxalic or benzene sulphonic acid, and nickel may be used as the hydrogenation catalyst.  Starting materials specified are benzonitrile, ortho phthalodinitrile, and b -pyridine nitrile. The aldehydes may be removed from the reaction medium by solvent extraction or steam distillation.  A distillate containing b -pyridine aldehyde may be passed into an aqueous solution of the hydrazide of isonicotinic acid to form the corresponding hydrazone.
Patent GB-736720-A (GB)
Title: Derivatives of para-aminosalicylic acid and their production
Inventor: SEYMOUR DONALD EDWIN
IPC: C07K1/00
Filed: 1953-04-27
Abstract: The invention comprises the alkali metal and calcium salts of 4-(21-hydroxy-41-amino) benzamidosalicylic acid and their preparation.  Examples illustrate the preparation of the sodium and calcium salts.  The products are of value as chemotherapeutic agents. Specification 714,170 is referred to.
Patent GB-821217-A (GB)
Title: Reservoir for hydraulic system
Inventor: BRACKIN RICHARD FRANCIS
IPC: B62B3/06
Filed: 1958-04-11
Abstract: 821,217. Reservoirs for hydraulic systems. YALE & TOWNE MANUFACTURING CO. April 11, 1958, No. 11536/58. Classes 69 (1) and 69 (2). A reservoir is provided with means for preventing turbulence and consequent cavitation and aeration which would otherwise arise in an industrial truck hydraulic lifting system in which a pump is continuously operated and the fluid by-passed to the reservoir when the lifting-rams are inoperative. A channel-member 22 is secured to the bottom of the reservoir and communicates at one end with a pipe 20 through which liquid is discharged to the reservoir when the pump is by-passed and when the rams are retracted, and at the other end with suction pipe 21 leading to the pump. Channel member 22 forms an enlarged passage between the pipes 20, 21 and is formed with apertures 26 providing restricted communication with the rest of the reservoir. Apertures 26 enable fluid to be drawn from and discharged to the main part of the reservoir during extension and retraction of the rams, and at all times provide a sufficient interchange of liquid to prevent overheating.
Patent GB-670168-A (GB)
Title: Holder for microscope slides
IPC: G01N1/31
Filed: 1950-05-09
Abstract: 670,168. Microscope slide holders. WEISKOPF, E. C. May 9, 1950, No. 11553/50. Class 97 (i). The holder comprises a frame having a helical spring mounted therein for supporting slides between its turns, an opening for insertion and removal of the slides, and two sides which extend parallel to the spring and limit lateral movement of the slides. As shown, the frame comprises a base 14, side walls 16, 18, an end wall 20 and another end wall which consists of spaced parts 22, 24. The frame may be formed of a single piece of material and the parts 22, 24 are secured to the end wall 20 by shafts 47, 49 respectively. Encircling these shafts and anchored to the end wall 20 and the end wall part 24 respectively are helical springs 36, 38 between which is a channel-shaped partition 26 in which slide members 52, 64, each connected to a pin 4S or 60 which extends through a slot in the partition and a slot in the side walls 16 or 18 and is secured to a pivoted catch 54, which may engage end wall part 22 or end wall 20 to hold the spring 36 or 38 in its extended position. When in this position slides may be inserted between adjacent turns of each spring, the springs thereafter being released so that they grip the slides.. Brackets 78 extend from the end walls of the frame for supporting the slide holder in an automatic immersion apparatus, such as described in Specification 570,430.