baber/WOPTO huggingface dataset:
Patent GB-954891-A (GB)
Title: Improvements in or relating to semiconductor devices and methods of making such devices
Inventor: FULLER DENNIS QUINTRELL
IPC: A01B63/114
Filed: 1960-06-29
Abstract: 954,891. Semi-conductor devices. PYE Ltd. June 28, 1961 [June 29, 1960; May 8, 1961], Nos. 22779/60 and 16614/61. Heading H1K. In a method of making a semi-conductor device such as a diode or transistor, each of one or more leads having enlarged integral head portions is used as a punch for punching out a pellet from a strip of suitable material, which pellet covers the surface of the head portion and is applied to the surface of a semiconductor body during the continuation of the punching stroke, so that subsequent heat treatment secures the lead to the body and forms an ohmic or rectifying contact. As shown, the head 3a of a lead 3 having its end face coated with aluminium 4, punches a pellet 7 from an indium tape 1 on to a germanium wafer 5. During the subsequent alloying step, Al from coating 4 improves the emitter injection efficiency. To form a transistor, the wafer is inverted and the process repeated, or a similar punching operation is effected from below the wafer. The leads may be made of nickel, gold or "Kovar" (Registered Trade Mark); to produce an ohmic contact, the head portion may be covered with gold or an appropriate alloy, such as Pb-Sb. The semi-conductor body may be of silicon. The second Provisional Specification describes the application of significant material to headed leads by evaporation, plating, and dipping, followed by alloying while the leads are held in a jig, or permanently mounted in a glass or ceramic support. The heads of the leads may be cylindrical, partconical, or of D-shaped cross-section.
Patent GB-442228-A (GB)
Title: Improvements in photophones
IPC: H04B10/50
Filed: 1934-08-04
Abstract: 442,228. Photophones. ZEISS, C., [Firm of], Carl-Zeiss-Strasse. Jena, Germany. Aug. 4, 1934, No. 22780. Convention date, Aug. 17, 1933. [Class 40 (v)] Relates to a photophone in which the pencil of light for the transmission of sound is modulated by a body that moves relatively to a totally reflecting surface and is rigidly connected to a part influenced by electromagnetic or electrostatic means. According. to the invention, the body and the electrically influenced part are mounted on the body containing the totally reflecting surface. As shown in Fig. 1, light from a source b passes through a condenser a to a rectangular prism c by which it is reflected through an objective d. A glass plate e lies against the surface c<1> of the prism and is mounted in an armature f, Figs. 2 and 3, which is pivoted at f<1>, f<2> on the surface c<1>. A tongue cut out from the armature is pressed against the surface cl by an adjusting screw h<1> carried by a bar h fixed to the legs of a horseshoe magnet l which holds the prism c and is supported by the housing m. An elastic arm i also presses against the armature near its axis of oscillation, the arm being pivoted on a bolt i<1> on the magnet l and actuated by a two-armed lever j pivoted at j<1> on the housing m so as to adjust the distance of the plate e from the surface c<1> or the pressure of the plate against this surface. The magnet l carries cores k located on the side of the armature facing the prism, speech currents passing through the windings surrounding these cores causing the armature f and plate e to oscillate thereby varying the pressure with which the plate e lies against the surface c<1> so as to control the amount of light which is reflected through the objective d. Flutes may be provided either on the surface c<1> or on the surface of the plate e co-operating therewith.
Patent GB-614812-A (GB)
Title: Improvements in or relating to snap-action electric switches
IPC: H01H23/20
Filed: 1946-08-01
Abstract: 614,812. Snap-action switches. BEER, D.C. Aug. 1, 1946, No. 22905. [Class 38 (v)] A snap-action switch has a trifurcated blade spring with the free ends of its outer limbs 2 joined by a transverse member 4 which rests in a V-slot 7 formed in a cylindrical part 5 of the operating lever 6. The free end of the bowed tongue 1 engages in another V-slot 8, and the butt end of the blade spring carries a contact 15 which bridges either of two pairs of contacts 13, 14. Movement of the lever 6 carries the end of the tongue 1 overcentre to snap the spring with contact 15 from one position to the other. The self-aligning bridge contact 15, Fig. 5, may be of channel-section and fixed by a projection 17 which passes through a hole 20 in the spring. In a modification, Figs. 6 and 7 (not shown), a spring strip is clipped around the cylindrical part to support the end of the tongue, and in a further modification the operating member is formed by an indented U-shaped strip. The spring and operating member, on assembly, are inserted sideways into the casing 9 and front and back covers are attached, but in the modification the casing complete with covers is formed in two halves split along a line through the axis of the operating member.
Patent GB-619066-A (GB)
Title: Improvements in or relating to devices comprising electric discharge tubes
IPC: H05B41/232
Filed: 1946-08-01
Abstract: 619,066. Supply systems for discharge apparatus. PHILIPS LAMPS, Ltd. Aug. 1, 1946, No. 22931. Convention date, Oct. 29, 1942. [Class 38 (iv)] [Also in Group XL (a)] An elongated discharge tube (e.g. mercury vapour lamp), has end caps 6, 7 bearing contacts 11, 8 and 9, 10 which engage corresponding contacts 13, 14 and 17, 16 respectively in lamp holders 12, 15. A conductor 4 joins the contacts 11, 10 via the electrode 3, and another conductor 5 joins the contacts 8, 9 via the electrode 2. These conductors 4, 5 may be secured along the outside or inside surface of, or within, the tube wall, and serve as current leads, so that no separate leads are required between the two lamp holders. More or less than two such conductors mav be required according to the circuit arrangements. The auxiliary ignition and operating devices (switch 22, condenser 23, choke 19) may be housed in either or both tube holders. Fig. 2 (not shown) illustrates a similar tube with modified circuit, in which the conductors 4 and 5 are both completely insulated from the electrodes 2 and 3.
Patent GB-960689-A (GB)
Title: Improvements in or relating to tobacco smoke filters
IPC: A24D3/02
Filed: 1960-06-30
Abstract: The filter of the parent Specification now has its wrapper bonded to its fibre mass to prevent smoke passage therebetween. In filters produced as in Specification 768,963 the bonding is by (1) a thermoplastic material, (2) a plasticizer-soluble compound or (3) a water-soluble adhesive.  In method (1) a web of wrapper paper is coated on one side with a compound of 85% polyethylene and 15% polyterpine resin which may be rendered tacky by heat applied before it reaches the wrapping point and also by heating the tow compression horn.  In method (2) a wrapper paper web may be coated on one side from a spreader nozzle (see Division D1) with a solution containing 1 to 10% cellulose acetate and the balance triacetin, on all but its sealing edge which is glued and heat-sealed.  One such web has an initial coating of a lacquer containing cellulose acetate, acetone, triacetin and ethyl acetate.  In method (3) a wrapper paper web coated with animal glue is activated by water from a sponge wick just before entering the tow compression horn.  Plastic sheet may be used instead of wrapper paper.  In one example acetate sheet 0.0015 or 0.002 inch thick is wrapped round a cellulose acetate tow spray plasticized with dimethoxy ethyl phthalate and is sealed with acetone using pressure without heat and then heat-bonded to the tow. Alternative thermoplastic materials are polypropylene, polyvinyl acetate, acrylate and methacrylate copolymers, ethylcellulose derivatives and terpene resins.  Alternative plasticizer-soluble compounds are natural gums, cellulose proprionate, cellulose acetate proprionate, ethyl cellulose derivatives, polyvinyl acetates and acrylate and methacrylate copolymers, suitable plasticizers being triethyl citrate, methyl phthalyl ethyl glycollate, dimethoxyethyl phthalate and tripropionin, or mixtures of two or more of these. Polyolefin coated wrappers as above prevent external crystallization of sucrose octa-isobutyrate where a solution containing this has been aded to the tow.  Wrapping paper webs used may be of a thickness between 0.001 and 0.005 inch.  The wrapping paper web coating compositions may have added thereto colouring agents, or flavouring agents such as menthol, oil of wintergreen or oil of cloves.  The coatings may be about 0.0001 inch thick.
Patent GB-1178997-A (GB)
Title: Liquid level control device
Inventor: HOWE ANTHONY BAXTER
IPC: F16N19/00
Filed: 1967-05-18
Abstract: 1,178,997. Valves; lubricating. GARDINER, SONS & CO. Ltd. 18 May, 1967, No. 23062/67. Addition to 1,106,385. Headings F2A and F2V. [Also in Division G1] The liquid level control device according to the parent is modified in that the float-operated valve and the pressure-responsive valve are housed in separate valve units connected together by an external duct.
Patent GB-1430985-A (GB)
Title: Process for preparing an elastomeric copolymer block
IPC: C08F297/04
Filed: 1973-05-15
Abstract: 1430985 Elastomeric block copolymers STAMICARBON BV 15 May 1973 [20 May 1972] 23111/73 Heading C3P An elastomeric block copolymer of the general formula A-B-A, where A is a non-elastomeric polymer block derived from an alkenyl-aromatic compound with an average molecular weight between 200 and 100,000 and B is an elastomeric polymer block with an average molecular weight between 20,000 and 500,000, is prepared by polymerizing one or more monomers into a non-elastomeric polymer block by means of a mono-functional anionic initiator, then polymerizing one or more monomers into an elastomeric polymer block joined to the non- elastomeric polymer block, and linking the resulting block copolymers in a polar medium to form the A-B-A block copolymer by the addition of a linking agent which is a fully esterified carboxylic acid in which no hydrogen atom is attached to the α-carbon atom. In the examples styrene, α-methyl styrene and butadiene-1,3 are polymerized in the presence of cyclohexane and secondary butyl lithium and linked with ethyl benzoate and methyl pivalate in the presence of tetrahydrofuran.
Patent GB-841665-A (GB)
Title: Textile crimping apparatus
Inventor: RAINARD LEO WALTER
IPC: D02G1/12
Filed: 1958-07-18
Abstract: <PICT:0841665/IV (c)/1> Apparatus for crimping yarn, tow, &c., comprises a tube 14 having a saddle at the bite of feed-rolls 21, 22 to form a crimping-chamber 40 where the yarn &c. is crimped as it is fed against a mass of yarn held compacted in the tube; take-up means 70 to withdraw the crimped yard under tension from the tube; and a sleeve 43 inside the tube which extends from one end of the tube to a point adjacent the crimpingchamber, has an inner passage forming a continuation of the crimping-chamber, and is spaced away from the walls of the tube to provide an annular passage to which treating-fluids can be admitted by suitable connecting-means.  The crimping-chamber is formed by a tapered bore in a thickened part of the tube 14; the tube is secured in position by a nut 15 on a screwed split end of a tube 13 forcefitted into the block; and the sleeve is secured to the tube by a bush 45 and a cap-nut 46. Treating-fluid (steam, hot water, setting liquid or dye) can be admitted to the annular passage and thence to the crimping-chamber from a pipe 49 through a passage 44; the supply can be interrupted by a valve 50 or by adjusting the sleeve to close the passage.  A cup 60 to introduce oil, setting liquid or dye into the sleeve; a plug 67 resting on the yarn; a heating-element 51; and spring-means 31 to maintain the rolls 21, 22 in engagement with the yarn &c. are provided.
Patent GB-405908-A (GB)
Title: An improved collapsible or knock-down box
IPC: B65D6/16
Filed: 1933-08-22
Abstract: 405,908. Collapsable packing-cases. GREEN, H. J., Aldrington Works, Hove, Sussex. Aug. 22, 1933, No. 23341. [Class 18.] A collapsable packing-case of the kind in which the sides and ends are hinged together and the top and bottom only removable is constructed with the side 5 and end 7 hinged together at 6 independently of the side 8 and end 10 which are hinged together at 9, and the free ends of the sides or ends are reduced as at 11 to provide a fitting for engaging the other end or side, removable top and bottom covers with rims 3 serving to hold the box assembled, the sides and ends being totally enclosed in the covers, when the box is disassembled, and the covers being secured by a wire.
Patent GB-504695-A (GB)
Title: Improvements in and relating to voltage regulating systems
IPC: H02J3/06
Filed: 1938-08-08
Abstract: 504,695. Supply systems ; electric transformers. BRITISH THOMSONHOUSTON CO., Ltd. Aug. 8, 1938, No. 23399. Convention date, Aug. 11, 1937. [Classes 38 (ii) and 38 (iv)] Boosting by transformers.-A transformer voltage regulating system adapted to be connected in a tie line interconnecting a pair of alternating current power systems comprises a transformer provided with tap connections for changing under load the input-output voltage ratio of the transformer without changing the relative phase angle of the voltages, and a second transformer provided with tap connections for changing under load the phase angle relation between its input-output voltages without substantially changing the ratio of those voltages, and electrical connections for causing one of the transformers to act as an exciting transformer for the other one. Fig. 2 shows an arrangement comprising a section of a three-phase tie-line between two power systems A-B, wherein is introduced a starconnected auto-transformer 4 with windings 8-10 respectively connected to conductors I-III. Separate tap-connections 11-13 cooperating with the windings 8-10 provide means for obtaining a balanced, variablemagnitude, constant-phase voltage from the transformer 4. The second transformer 5 comprises a mesh-connected primary winding which, as shown, may be hexagonally connected, and a secondary with three windings 14-16 respectively connected in series with the conductors I-III, the primary windings 17, 18 being associated with secondary winding 14, windings 19, 20 with secondary winding 15, and windings 21, 22 with secondary winding 16. Phase changing is effected by tap-connections 23-25 which are located symmetrically relatively to the primary coils and are connected respectively to the tap-connections 11-13 on the exciting transformer 4. Fig. 7 shows a modification for large high voltage systems, comprising an exciting transformer with primary windings 8-10 and tapped secondary windings 8<1>-10<1> on a three-limbed core 26. The tapped windings are connected to sets of contacts 27-29 co-operating with tap changers 11-13. The series transformer 5 is a threephase transformer wound on a three-limbed core 30, with its secondary windings 14---16 in series with the lines I-III, and primary windings 17-22 connected at their ends and mid-points to contacts 31 around which phase. imgle tap-connections 23-25 arc adapted to move. With this arrangement the phase-angle of the regulating voltage may be changed in thirty-degree steps. Contactors 32 and preventive reactors 33 are connected in the conductors between the transformers, the reactors consisting of equal turns wound in opposition on a magnetic core. The contactors 32 are arranged to be opened before the tap-connectors associated therewith on one or the other transformer are moved. In another modification, the series transformer has a delta wound primary, while in a -further modification for two-phase working the series transformer has a square type of mesh primary with four tap connections to the exciting transformer.
Patent GB-488763-A (GB)
Title: Water cocks
IPC: F16K1/42
Filed: 1937-08-26
Abstract: 488,763. Water cocks. NIELSEN, R., and SVENDSEN, A. Aug. 26, 1937, No. 23455. Convention date, Aug. 26, 1936. [Class 135] A seating for the valve washer 7 of a water cock is provided by a bush 3 of hard rustproof steel having a flange 5 pressed into the metal of the cock. The inner edge of the seating is chamfered to give a more uniform flow and to eliminate noise.
Patent GB-1126850-A (GB)
Title: Improvements in or relating to cooled rollers
IPC: C03B13/16
Filed: 1967-05-19
Abstract: 1,126,850. Rollers. TOKYO SHIBAURA DENKI K.K. 19 May, 1967 [10 Sept., 1966], No. 23499/67. Heading F2U. [Also in Division C1] A roller comprising a cylinder 6 fast with a shaft 1 is cooled by liquid supplied through an axial inlet passage 2 to passages provided between vanes 7d which are provided between core members 7 rotating with the roller. The coolant then passes through the annular space between the cores and the cylinder, and through radial grooves 9 in the cores to ducts 10 and radial openings 11 leading to an outlet passage 3. As a modification the two cores may be replaced by a single member having a plurality of centrally disposed passages. A pair of such rollers may be employed as feed rollers in a ribbon type glass bulb blowing machine to form a ribbonshaped glass blank from molten glass supplied thereto.
Patent GB-812473-A (GB)
Title: Improvements in or relating to double-skinned panelling
Inventor: JONES JOHN HESKETH
IPC: E04C2/34
Filed: 1956-07-31
Abstract: 812,473. Building panels. SHEARWATER Ltd. July 31, 1957 [July 31, 1956], No. 23534/56. Class 87(1) A hollow panel comprises a dished facing sheet b and a plane or dished backing sheet a connected together around their edges by rivets or bolts e and hermetically sealed by two resilient gaskets c, d of rubber &c, the gaskets being located on opposite sides of the rivets &c. The edges of the sheets may have continuous co-operating recesses to house the gaskets and may be treated with a sealing compound. The spaced internal surfaces of the panel are preferably lacquered while the outer surfaces are flame-proofed or decorated. Internal supports or a filling of insulating material may be provided in the cavity, or alternatively the air may be evacuated from the cavity. The facing and backing sheets consist of metal, metal alloy, glass or plastics.
Patent GB-1138483-A (GB)
Title: Underwater x-ray apparatus
Inventor: SAYAG CLAUDE
IPC: G03B17/08
Filed: 1966-05-26
Abstract: 1,138,483. Underwater X-ray apparatus. EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM). 26 May, 1966 [1 June, 1965], No. 23582/66. Heading H5R. X-ray apparatus for underwater X-raying of articles, which may be radioactive, comprises, rigidly connected to a support structure having a part 1 extending down into the water: an X-ray source inside an hermetic box 7; a  rotatable film-protecting box mount 12 disposed on a vertical shaft 9 ; a guide track 16 for the protecting box 13 which moves on the track to load and unload the mount 12; a motor (26) to rotate the film-protecting box mount; means to control the rotation of the mount and to stop it in the loading and unloading positions and to determine the stop time in these two positions; and remotely controlled means, e.g. plate 17, for supporting the article 20 to be X-rayed. The protecting box mount 12 may be a drum-shaped cylindrical member formed with a recess corresponding in shaped to the protecting box and having a conical-shaped entry (not shown) to facilitate entry of the protecting box. The protecting box may have a balancing mass (25) the guide track 16 may be a rail track. The motor (26) may be a variable speed device operating through a transmission comprising a rotating Maltese cross system (33). The Maltese cross transmits movement to shaft 9 via a gear train (34, 35) providing a step up ratio of 2:1 and is coupled to the motor via an automatically disengaging clutch (31) operated by lever (29) acting on abutment (30). The means for supporting the article 20 may comprise a bottom support member 19 and side retaining flanges 21. The X-ray source may have a shutter opening when the film is in the exposure position, the shutter being controlled by the protecting-box mount-rotating means. The motor may be a step-by-step motor controlled by an electronic circuit. The support structure may be carried on a movable support above water level. The collimator 23 may have an adjustable or interchangeable air screen 24.
Patent GB-692554-A (GB)
Title: Stabilisation of vinyl chloride polymers
IPC: C08K5/57
Filed: 1949-09-14
Abstract: Polymers and copolymers of vinyl chloride are stabilized against thermal decomposition by a tri-alkyl tin mono-alkoxy compound in which the alkyl radicals are such that the corresponding tri-alkyl tin chloride is soluble in the polymeric composition.  Preferably the alkyl radicals contain at least 4 carbon atoms and the alkyl radical of the alkoxy group contains from 1 to 8 carbon atoms.  Tributyl tin mono-ethoxide and butoxide and tri-n-octyl mono-ethoxide are specified.  The stabilizers may be added before, during or after polymerization.  The compounds probably react with hydrogen chloride to produce the trialkyl tin chloride and the alkanol.  One of these may be removed by volatilization during processing.  Copolymers which may be stabilized include those of vinyl chloride with acrylic and methacrylic esters, acrylonitrile, maleic and fumaric acid esters (including the dihexyl and dibenzyl esters), itaconic and aconitic acid esters, vinyl esters (including the chloroacetate and methoxy butyrate), esters of glycol monoalkyl ethers, and vinylidene chloride.  Compositions containing also dibutyl phthalate, dioctyl phthalate, methyl glycol phthalate, tricresyl phosphate and stearic acid are exemplified.  Specification 692,556 [Group IV (b)], is referred to.ALSO:Tri-alkyl tin mono-alkoxides are prepared by reacting a tri-alkyl tin mono-halide with an alkali metal alkoxide. The halide may be added to a solution of the alkoxide in the corresponding alcohol, or the dry, powdered alkoxide may be reacted with an ethereal solution of the halide.  The alkali metal halide is precipitated and the tri-alkyl tin alkoxide may be recovered by distilling the filtered solution under reduced pressure. Preparations of tri-n-butyl tin monobutoxide and tri-n-octyl tin mono-methoxide are described in detail.  The required tri-alkyl tin halide may be prepared by heating a mixture of a tetra-alkyl tin and a tin tetrahalide, or by first forming the alkyl magnesium halide by Grignard methods and reacting it with a solution of tin tetrahalide. Specification 692,556 is referred to.
Patent GB-164268-A (GB)
Title: Improvements in the manufacture and production of cardboard boxes
IPC: B65D5/32
Filed: 1920-08-13
Abstract: 164,268. Wood, M. A., (Tyer, J. J.). Aug. 13, 1920. Covered boxes; apparatus for making. A cardboard box is made from two blanks, each with four rectangular projecting pieces which are turned up into open-box formation, and a rectangular strip of paper. A matrix or supporting block is placed within one, and covered by the other blank. The rectangular strip of paper C is then gummed round the whole, and the edges C<2> and C are turned down and secured to the flat portions A and B of the box so formed. The strip C and the overlapping portion of the outer blank are now cut through, and the matrix withdrawn, leaving a shouldered box as shown in Fig. 8. A trade label may be used.
Patent GB-255268-A (GB)
Title: Improvements in or relating to rolling metal rods bars or the like
IPC: B21H3/02
Filed: 1925-09-23
Abstract: 255,268. Wade, H., (Abramsen, P. B.). Sept. 23, 1925. Roilling screw-threads; skew-rolling. - Round bars are reduced in diameter by feeding each bar into skew rolls 2, 3 which circumferentially furrow them by screwing and then by pressing down the ridges in other skew rolls 21, the bar being free to elongate. The bar A is placed between pivotally-mounted guides 8 and a top guide 12 until its end bears against a stop 10. Rotation of the cams 11 by links 9 forces the bar A up so that it is gripped at its sides between the rolls 2, 3 and screw-threaded. Guides 19, 20 are provided for the passage of the bar between the smoothing rolls 21. A succession of non-continuous screwing and smoothing rolls with a finishing pair of hyperbolic skew rolls forms a mill.