baber/WOPTO huggingface dataset:
Patent GB-1267377-A (GB)
Title: Spot welding apparatus and method
Inventor: HAGEN WILHELM FRIEDRICH
IPC: B23K26/067
Filed: 1969-03-27
Abstract: 1,267,377. Welding by fusion. AMERICAN OPTICAL CORP. 27 March, 1969 [25 July, 1968], No. 16097/69. Heading B3R. [Also in Divisions G2-G3] In a laser spot welding apparatus, a beam 40 from a laser 38 is directed through a collecting lens 42 and a pinhole 44 to produce a mode selected diverging beam 40a in which non-axial modes are substantially eliminated and which is then directed through objective lens means focusing at least a portion of the beam 40a at at least one welding spot. In Figs. 1, 2, the apparatus is used to effect a multiplicity of spot welds 28 between pads 24 and leads 26 in an integrating circuit, plug-in, silicon chip 22. Objectives 50 in a mask 52 are geometrically arranged and optically directed to achieve the desired position of the spot welds 28. A lens 56 preceding the mask 52 bends the rays in the beam to meet at the meeting point of the objective axes 54. Preferably, the objectives have large apertures and short focal lengths. Adjustment of objective aperture size by selection of objective diameter or by conventional diaphragm means may compensate for non- uniformity in the beam, and may provide different energy densities at different spots if required. Minimum spot size is dependent upon size of Airy disc produced by each objective. The pads 24 may be of aluminium and the leads 26 of NiCo alloy steel. After welding, the chip 22 is encapsulated, e.g. in plastics, as indicated at 32, and the parent strips 30 of the leads 26 are cut off.  In Fig. 5, the objective lens means comprises two sets of parallel plane-cylindrical lenses 66, 68 cemented or otherwise mounted orthogonal to each other. In Fig. 9, prismatic objectives 74, e.g. off-axis sections of double-convex lenses, are arranged in compact, evenly distributed, relationship in a mask 72 and direct beams 60a to unevenly distributed and/or widespread welding spots 70. In this embodiment, the preceding lens 56 of Fig. 1 may or may not be employed.
Patent GB-1243770-A (GB)
Title: Steam boilers
IPC: F22B9/12
Filed: 1970-04-06
Abstract: 1,243,770. Steam boiler. SULZER BROS. Ltd. 6 April, 1970 [11 April, 1969], No. 16120/70. Heading F4A. In a steam boiler 1 hot flue gases are produced in a combustion chamber 32 and pass along tubes 5 and 21 immersed in the water of the boiler. The inlet ends of the tubes 5 are secured in a tube plate 4 which is shielded by a screen of coolant tubes 7 from radiation from the combustion chamber. The tubes are connected to a coolant source-in this case they are open to the water of the boiler, but a separate supply may be used and the tubes could serve as a preheater for the feedwater to the boiler. In modifications, Figs. 3, 4 (not shown), at least some of the coolant tubes have upward extensions and nozzles can be located beneath each open end of at least some of the tubes.
Patent GB-1462665-A (GB)
Title: Cold-forming metal articles
IPC: B21J13/02
Filed: 1974-04-11
Abstract: 1462665 Forging GLAENZER SPICER 11 April 1974 [17 April 1973] 16181/74 Heading B3H  Apparatus for cold forming metal parts comprises a multi-part die 28 which forms a cavity 90, Fig. 12, when closed provided with radial channels 91 and a set of punches 29, 30 which extend into the die, the punches and die parts being carried by a press piston 26 and table 27. The die parts 28 are mounted on blocks 32 slidable in slots on inclined blocks 35 held between plates 37, 38 urged together by tie bolts 40. The blocks 32 are connected by a toggle linkage 46, 48 to a sleeve 55 slidable on the piston column extension 56. The link 46 acts as a pawl and has a surface 46a adapted to engage under a bearing surface 59 on an abutment member 60. A spring 69 acts between the piston extension shoulder 70 and a shoulder 71 on the sleeve 55. The upper punch 29 is rigidly mounted to the piston 26 and the lower punch 30 is fixed by a ring 81 to a column 75 on the press table 27. The plate member 37 is slidable on the column 75 and urged upwards by three compression springs 77. In operation a workpiece is positioned on the lower punch 30 with the die parts open. The lower punch may be slightly magnetized to retain the workpiece. The piston is moved downwards causing the blocks 32 to slide along the inclined slots. The toggle linkage 46, 48 moves outwards and the pawl engages under the block 60 to cause a prestressing force radially of the die parts to hold them together. The speed of the upper punch 29 is arranged to be one half the speed of the multi-part die. The apparatus is used to rough forge workpieces with radial projections for later finishing. The finishing apparatus, Fig. 18, comprises a pair of dies 105, 106, a vertical punch 107, a first group of three horizontal radially acting punches 108 and a second group of three horizontal radially acting punches 109. The opposed die surfaces have radial half cylindrical passages 114, 117, Fig. 19, for the punches. The punches 108, 109 are mounted at their rear on rectangular plate blocks 210 slidable in a slot in a respective oblique block 212 which is moved downwards by abutment. The lower die 106, Fig. 15, is mounted on a slidable shaft 110 leading to a sleeve 166 controlled by a toggle linkage 187, 189 with a cam follower roller 194 engaging a cam 195 on the press frame. In operation a rough forged workpiece is positioned on the lower die 106 and the press piston 103 lowered to bring the dies 105, 106 together. The dies 105, 106 are lowered together with the punches 108, 109. The punches 108, 109 form bores (13), (19), Fig. 7 (not shown), in the finished articles. The central punch 107 forms a bore (14). The final workpiece may have three or four radial arms at various axial positions of its central hub. The starting billet may be hollow and filled with elastomeric material or liquid during forging.
Patent GB-587950-A (GB)
Title: Improvements in salt bath furnaces
IPC: C21D1/46
Filed: 1944-08-26
Abstract: 587,950. Salt bath furnaces. BRAYSHAW FURNACES & TOOLS, Ltd., BRAYSHAW, S. N., NEWMAN, F. C., and RUSHTON, F. Aug. 26, 1944, No. 16214. [Class 51 (ii)] [Also in Group II] In a salt bath furnace a heating device is arranged in a run off passage at or near the bottom of the bath and is inactive during the operation of the furnace, being embedded or partially embedded in solidified salt to form a plug, but is put into action to melt the plug and allow the contents of the bath to escape. As shown, a salt bath A has an outlet a in which are fitted two electrodes D1 and D2 and a removable cover B on a run off spout a<1>. During normal running the outlet is closed by the electrodes and solidified salt but when it is desired to empty the bath the cover is removed and current is supplied to the electrodes from bus-bars d' and d' which melts the salt plug and allows the fused salt to run out into a receptacle which may be divided into smaller receptacles. The heating element may comprise electrodes, an electrical resistance, a bar of metal the end of which may be strongly heated or a hollow metallic tube through which may be passed hot gases, and it may be made automatically removable when the salt plug is melted. A loose fitting tapered plug may be inserted into the outlet to ensure solidification of the fused salts when they are first run into the bath.
Patent GB-501707-A (GB)
Title: Improved method of preparing a material containing luminescent zinc sulphide or zinc-cadmium sulphide
IPC: C09K11/56
Filed: 1938-06-01
Abstract: 501,707. Luminescent materials. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. June 1, 1938, No. 16415. Convention date, June 4, 1937. [Class 39 (i)] Luminescent zinc sulphide or zinc-cadmium sulphide is surrounded during the heating step in its preparation by an inorganic salt mass which contains as the basic constituent zinc oxide and, if desired, Na2O, and as the acid constituent B2O3 and/or P2O5 the composition satisfying conditions which define the relation between the mol. percentages of the constituents. The salt mass exercises a protective effect on the luminescent material and increases the luminous efficiency. In one example, a mixture of zinc oxide, sodium carbonate, boric acid and phosphoric acid is heated in a platinum basin for ¢ to 1 hour to a temperature of 400-500‹ C. The sintered mass is pulverized and heated in a platinum crucible to 1100‹ C. The vitreous coagulated mass is then cooled, pulverized in a steel mortar and sieved. The powder is mixed with 5 grs. of a green-luminescent zinc sulphide preparation and heated to 900‹ C. for from 5-10 minutes, stirred and poured onto a cold plate. In the further examples either phosphoric acid, boric acid or sodium carbonate are omitted and different zinc sulphides or zinc cadmium sulphides are combined with the sintered salt masses. Potassium carbonate may be used in place of sodium carbonate. The luminescent mass so obtained may be made into advertising and decorative articles, or in gas discharge tubes in - which it is melted onto the glass wall of the tube or an auxiliary tube.
Patent GB-491339-A (GB)
Title: An improved method of producing a cellular, clinker-like product by burning clay or rocks or mixtures thereof and a product thus produced
IPC: F27B7/00
Filed: 1937-06-14
Abstract: 491,339. Porous compositions; concrete; rotary furnaces. LINDMAN, E. I. June 14, 1937, No. 16421. [Classes 22 and 70] [Also in Group XII] Cellular clinker - like material, which may be used as an aggregate in light concrete, is made by melting or burning to a viscous melting state rocks or clay or both, which are expanded by gases enclosed or evolved therein, in a rotary or rocking furnace by flames burning above the rocks &c., the inner wall of the furnace having a coefficient of heat transmission substantially higher than that of the expanded mass, while in the expansion zone during expansion the surface of the mass is cooled at that part which at each moment is in contact or about to make contact with the furnace wall due to the rolling motion of the furnace, whereby the mass is prevented from sticking to the wall. The rocks &c. may be of eruptive or igneous origin, e.g. basalt, diabase, granite, schists or slates. Quaternary clay is passed through a rotary furnace 1 lined with chamotte 2, and burnt therein by gas, oil or pulverized coal flames from burners 6. The surface B-C of the charge is cooled (a) by radiation of heat to the chamotte, which is cooled by coils 11 and by water sprayed from pipes 10 on to the furnace shell, and (b) by cold air or other gas injected through a pipe 35 between the flames 4 and the chamotte lining. At 38 finely divided cold raw material, similar to or different from the main charge, is introduced. The heat absorbed by the cold air &c. preheats the raw material in the upper part of the furnace. Products of combustion are returned to the pipe 35 via pipe 33. The product is cooled in a drum 28 and crushed at 31.
Patent GB-591492-A (GB)
Title: Improvements in or relating to counter-rotating propellers
IPC: B64C11/30
Filed: 1942-11-20
Abstract: 591,492. Screw propellers. UNITED AIRCRAFT CORPORATION. Nov. 20, 1942, No. 16451. Convention date, Dec. 30, 1939. [Classes 4 and 114] In vehicle or aircraft power plant having coaxial propellers rotatable in opposite directions and driven by separate motors, the propellers are provided with pitch-changing means and with brakes for holding either propeller against rotation, so that, if one propeller becomes inoperative, it may serve as an airguide for increasing the efficiency of the other. The propellers 16, 18 are mounted on concentric shafts, which are provided with hand-controlled brakes 42, 44, and are driven through gearing by independent engines 12, 14. Pitch-controlling means, which may be hydraulically operated, is provided for each propeller. If either propeller is stopped either by accident or intentionally in order to save fuel &c., it is brought to the limiting high-pitch position, in order to minimize its drag, and is locked by means of its brake. The high-pitch limiting-stops may be so placed that the blades are turned slightly beyond the feathered position, so as to rotate the air stream entering or leaving the active propeller in the reverse direction. Specifications 505,077, 505,168 and 505,169 are referred to.
Patent GB-390673-A (GB)
Title: Improvements in or relating to furniture pouffes
IPC: A47C4/02
Filed: 1932-06-10
Abstract: 390,673. Seats ; rests. IRVING, C., 32, Holland Park, and FOXTON, Ltd., W., 1, Paternoster Square, both in London. June 10, 1932, No. 16463. [Class 52 (ii).] A furniture pouffe comprises two side members b, c joined by a cross member at the rear and a strip of fabric g underneath, and a centre member a pivoted on the side members and tapered in shape to leave a space to accommodate a loose cushion e. The loose cushion may be removed by unloosing buttons h<1>, and the centre member swung back to form a bedrest or floor seat.
Patent GB-1067027-A (GB)
Title: Improvements in or relating to the manufacture of elastic yarns
Inventor: MILNE PERCIVAL NORMAN
IPC: B65H51/04
Filed: 1964-04-21
Abstract: In a continuous process, high-bulk yarn is formed by unwinding an elastic filament at a constant, predetermined speed from a rotating package; feeding it on to a rotatably driven V-pulley the periphery of the base of the groove in which is so contoured, Figs. 2-5 (not shown) as to cause the filaments to travel in an undulating path in its passage thereover and thus be restrained against slippage; advancing the filament under uniform tension through a roller-drafting zone; drafting one or more rovings of inelastic staple fibres; gathering the filament and rovings in a final roller-drafting zone e.g. at the front rollers of a drafting set; finally twisting the rovings about the filament to form a sheath thereon.  The elastic filament may be of segmented polyurethane and the ineleastic fibres of cotton, wool, nylon, polyacrylonitrile, or polyethylene terephthalate.
Patent GB-1106412-A (GB)
Title: A typewriter type-bar assembly
IPC: B41J1/04
Filed: 1966-04-15
Abstract: 1,106,412. Typewriters. SCM CORPORATION. 15 April, 1966 [17 May, 1965], No. 16519. Heading B6F. A type-bar assembly for a typewriter comprises a type-bar 12 notched at 26 for the location of a removable type-head 35 having a mating lug 22 which is held in the notch 26 by a spring 28. A bent-out abutment 34 prevents an inverted assembly of the type-head on the bar, and also prevents accidental removal in the event of the type-bar stopping suddenly.
Patent GB-708550-A (GB)
Title: Improved means for de-panning loaves of bread and the like
IPC: A21B3/07
Filed: 1951-07-12
Abstract: 708,550. Endless conveyers. LISTON. S. July 12, 1951 [March 15, 1951], No. 16596/51. Class 78 (1) [Also in Group VI] An endless conveyer, for. baking apparatus, carries a series of attached pans [through the various baking stages and back inverted to the starting position, the pans being provided with loose bottoms which are raised after the loaves are baked so that, as the pans turn over to their inverted position, the loaves are ejected. Conveyer 1 mounted on sprocket wheels 2, one or both of which is driven, carries pans 3 having loose bottoms 5 which discharge the loaves on to cross conveyer 4. As shown in Fig. 2, each loose bottom may be moumted on a plunger 6, sliding in a boss 7 on the conveyer, and provided with a litter arm having a counter weight 9 and engaging a trip member 10. Fig. 2, to lift the loose bottom and loosen the loaf. Alternatively, Fig. 4, the plungers do not carry lifter arms but engage directly a rotary cylindrical member 11 attached to the adjacent sprocket wheel 2.
Patent GB-887412-A (GB)
Title: ª-,ª--disubstituted-ª--cyanoketones
IPC: C07C255/45
Filed: 1958-05-23
Abstract: The invention comprises b -cyanoketones containing a total of 13-25 carbon atoms and having the formula <FORM:0887412/IV (b)/1> where R1, R2 and R3 are alkyl or cycloalkyl, and R3 is hydrogen, methyl, ethyl or pentyl.  They are prepared by bringing together at about 125 DEG C.-275 DEG C. and in the presence of an alkaline catalyst capable of generating cyanide ions, HCN and a C12-24 a ,b -unsaturated ketone of formula <FORM:0887412/IV (b)/2> or a tautomeric b ,g -unsaturated ketone, the HCN being brought into contact with the ketone at a rate which is substantially that at which it reacts with the ketone. Preferably preformed mixtures of (a) the catalyst and the unsaturated ketone or the desired cyanoketone product and (b) HCN and the unsaturated ketone are brought together at reaction temperature. Batchwise or continuous operation may be used and atmospheric or superatmospheric pressures.  A volatile inert highly polar organic solvent may be present, e.g. dimethyl-formamide, dimethylacetamide, 1-methyl - 2 p  - pyrrolidinone, 1, 5 - dimethyl - 2 - pyrrolidinone or 1,3-dimethyl-2-imidazoline.  The HCN may be introduced in the gaseous state.  Suitable catalysts include alkali metals and their carbonates, alkali and alkaline earth metal alkoxides, oxides, hydroxides, peroxides and cyanides, t-amines and quaternary ammonium bases.  About 1%-20% by weight of catalyst may be present.  The catalyst may be neutralised at the end of the reaction.  The products are stated to be useful as solvents for polymers and as pesticides (see Group VI).  Specification 730,209 also is referred to.ALSO:Insecticidal compositions comprise a b -cyanoketone having a total of 13-25 carbon atoms and having the formula <FORM:0887412/VI/1> where R1, R2 and R4 are alkyl or cycloalkyl, and R3 is hydrogen, methyl, ethyl or pentyl, together with an inert solid or liquid carrier, e.g. a hydrocarbon.  Specification 730,209 also is referred to.
Patent GB-670994-A (GB)
Title: Method of treating artificial fibres, threads and yarns from synthetic high molecular linear polymers and polycondensates
IPC: D06M23/00
Filed: 1949-06-24
Abstract: Artificial yarns of synthetic high molecular linear polymers, e.g. polyamides and polyurethanes, which have been twisted to at least 900 turns per metre, are subjected to treatment, e.g. impregnating, fixing the twist, dyeing, delustring, stiffening and softening, whilst still wound on perforated sheet-metal twisting cops.ALSO:Artificial yarns of synthetic high molecular linear polymers, e.g. polyamides and polyurethanes, which have been twisted to at least 900 turns per metre, are subjected to treatment, e.g. impregnating, fixing the twist, dyeing, delustring, stiffening and softening, whilst still wound on perforated sheet-metal twisting cops.
Patent GB-1144954-A (GB)
Title: Apparatus for use in the manufacture of mattresses and the like articles
Inventor: DOCKER LESLIE THOMAS
IPC: D05B11/00
Filed: 1967-04-08
Abstract: 1,144,954. Sewing. SLUMBERLAND GROUP Ltd. 8 April, 1968 [13 April, 1967; 28 April, 1967], Nos: 16917/67 and 19599/67. Heading D1G. Apparatus for the manufacture of mattresses in which a sewing machine moves on rails 33 around the article characterised in that the article support 32 comprises a conveyor 37 to move the article from the support. The conveyor may be of the roller or chain type. The mattress may be turned over by a bar 46 which will lift the mattress on end, a movement of the conveyor while the bar is fully raised causing the mattress to fall over backwards.
Patent GB-421642-A (GB)
Title: Improvements in and relating to electric motor control systems
IPC: H02P5/68
Filed: 1933-06-14
Abstract: 421,642. Systems for transmitting mechanical power; charging batteries. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Axtell, C. J. ; 258, West 6th Street, Erie, Pennsylvania, U.S.A.) June 14, 1933, No. 16996. Convention date, June 24, 1932. [Class 38 (iv)] [See also Group XXXVII] In order that a D.C. motor 5 connected to a series generator 3 driven from a variable speed engine 1 may drive a load 2, e.g. a compressor, at substantially constant speed, a storage battery 8 is connected in series with the shunt field winding 7 of the motor in opposition to the voltage of the generator. On starting, the motor is energized through a series winding 6 of low resistance, an automatic cut-out 9 preventing the connection of the battery 8 and shunt winding 7 until the voltage of the generator reaches a predetermined value. The battery 8 is charged through the shunt winding, and may supply current for starting, lighting and ignition circuits. In the arrangement shown, the battery can be connected to a starting motor 12 for the engine 1 through a switch 11. Reference has been directed by the Comptroller to Specification 380,489, [Group XXXVII].
Patent GB-786382-A (GB)
Title: Improvements in or relating to the manufacture of benzene carboxylic acids
IPC: C07C51/27
Filed: 1955-06-13
Abstract: Tri- and multi-basic benzene carboxylic acids or derivatives thereof are obtained from methyl-substituted benzenes such as xylenes, crude xylenes, mesitylene, pseudocumene and durene and their derivatives such as nitroxylenes, by converting the methyl-benzenes, by side-chain chlorination and chroromethylation, into chloromethylated benzenes of formula C6H3-0[(CH2)Cl]3-6, which are oxidized with nitric acid to substantial freedom from chlorine and the resultant acids are separated from the reaction mixture.  The chloromethylation is carried out using chloromethyl ether of hydrogen chloride and formaldehyde and the side-chain chrorination is carried out in the molten state with chlorine at 120 DEG  to 130 DEG  C.  The chlorination and chloromethylation reactions may be effected in either order.  Oxygen or an oxygen-containing gas, e.g. air, is preferably passed through the oxidation mixture. The oxidation products are separated from the reaction mixture and freed from chlorine-containing compounds by washing with a solvent, preferably the initial methyl-benzene, which may then be used as starting material.  In an example, crude xylene is reacted with hydrochloric acid and formaldehyde to give a bis-chloromethyl-xylene which is chlorinated to give a tetrachloromethyl - benzene.  Other methyl-benzenes are converted into chloromethyl-benzenes similarly and oxidized, the results being shown in a table.  Thus, xylene is converted into a tri-(1 : 2 : 4)- or tetra-(1 : 2 : 4 : 5)-chloromethyl-benzene which on oxidation give trimellitic and pyromellitic acids, mesitylene gives penta-chloromethyl-benzene and benzene pentacarboxylic acid and durene gives hexa-chloromethyl-benzene and mellitic acid. Specification 771,086 is referred to.
Patent GB-1312715-A (GB)
Title: Liquid level meters
IPC: G01F1/52
Filed: 1970-04-09
Abstract: 1312715 Measuring liquid levels; measuring rate of flow BOPP & REUTHER GmbH 9 April 1970 [11 April 1969] 17021/70 Headings G1H and G1R A liquid level meter for measuring the level of a contaminated liquid comprises a liquid level measuring probe 1, 2 in a reservoir having a resilient diaphragm 4 and arranged to sense the level of liquid in the reservoir 8, the diaphragm in use separating a clean liquid 3 within the reservoir from a contaminated liquid 5 outside of the reservoir and the arrangement being such that the clean liquid level 8 is able to adjust to the contaminated liquid level 9. The diaphragm between concentric perforated members 6, 7 is sealed to the base 11 of a container 10 which has perforations 12 outside the diaphragm. The level of a contaminated fluid 5 may be determined more accurately since the level measuring probe will only contact clean fluid. In use, when the level 9 of contaminated fluids is low, the diaphragm will be pressed by the weight of clean fluid within against the outer member 7, and as the level of contaminated rises, the diaphragm will be pressed increasingly against the inner member 6, and the clean fluid inside will continue to have the same level as the contaminated fluid outside the diaphragm. In use measuring rate of flow of fluid in an open channel, the level of fluid before a constriction rises and the determination of the amount of the rise using this meter gives a measure of flow rate.