baber/WOPTO huggingface dataset:
Patent GB-1143689-A (GB)
IPC: B29C48/05
Abstract: 1,143,689. Sheathing filaments by extrusion. E. I. DU PONT DE NEMOURS & CO. 7 Dec., 1967 [12 Dec., 1966], No. 55791/67. Heading B5A. [Also in Division G2] One or more light transmitting filaments, such as are described in Specification 1,037,498, are covered with synthetic resin or rubber to form a light-guide, by passing the filament or filaments along a conduit 18 in extrusion crosshead 1 to enter a resin or rubber tube formed between annular die 9 and mandrel 12, see also Figs. 3A-3C (not reproduced). The distance between orifice 2 and the outlet 14 of mandrel 12 is adjusted so that firstly, the tube is an interference fit with the filaments and secondly, insufficient back-pressure is created to cause flow of material rearwardly within conduit 18. The second requirement is particularly necessary when an irregularly crosssectioned bundle of filaments is used, Fig. 4 (not shown), and the first requirement ensures that such a bundle is embedded in the tube, Fig. 5 (not shown). Extrusion through orifice 2 gives a circular cross-section to the light-guide irrespective of the cross-section of the filament bundle. Mandrel 12 is adjustable axially by rotation of screw thread 19 within fixed nut 22 and is held in position by lock nut 20. Vacuum is applied between the filaments and the tube via conduit 24 and perforations 13 to both draw the tube on to the filaments and to produce a cooling effect. Typically the lightguide has a diameter between 2 and 4 mm. Resinous covering materials mentioned are synthetic rubber, low or medium density polyethylene, polypropylene and vinyl chloride polymers or copolymers. As described in Specification 1,037,498 the filaments may be of polymethylmethacrylate sheathed in fluoroalkyl methacrylate or polystyrene sheathed in polymethylmethacrylate.
Patent GB-1225172-A (GB)
IPC: B60H1/00
Filed: 1968-04-02
Abstract: 1,225,172. Sheathed cable transmissions. TELEFLEX Inc. 2 April, 1968 [12 June, 1967], No. 15719/68. Heading B7E. A sheathed cable transmission comprises a housing 18 formed with a recess 26 and a slit 38, there being movable along the slit a slider member 20 having a finger tab 40 and port 46 to which latter is attached one end of the inner cable 12, the member 20 being held in any desired position along the slot by a resilient washer 22 which bears on the outer face of wall 24 and by a bearing member on the inner face of the slot. The washer 22 is retained by a shoulder 48 and the end of cable 12 by a split further shoulder 50. The sheath 14 is retained with respect to cable 12 on a post 32 integral with housing 18. The housing, slider member and washer may all be made of plastics material of differing densities.
Patent GB-1225810-A (GB)
IPC: H01M12/08
Filed: 1968-12-24
Abstract: 1,225,810. Rechargeable metal-air cell. SVENSKA ACKUMULATOR A.B. JUNGNER. 24 Dec., 1968 [29 Dec., 1967], No. 61331/68. Heading H1B. A rechargeable metal-air cell comprises a metal as negative active material in the charged state and an aqueous solution of a salt of the metal with a non-volatile oxy-acid as electrolyte in the charged state. The metal may be Zn, Cd, Fe or Mn and the anion may be sulphate, selente, borate or perchlorate. The electrolyte may also include sulphide ions and a salt of an alkali metal, alkaline earth metal or aluminium, e.g. potassium metaborate. The air electrode may be of Pb, Ta or C. In the cell illustrated the case 1 and partition walls 2 are of galvanized copper and constitute the negative electrode. Lid 7 is of insulating material. Air duct 5 is supplied by a fan or pump (not shown). Each air electrode 3 comprises a corrugated lead plate 11, engrained with catalyst metal and enclosed between sheets of microporous insulating material 13.
Patent GB-1226174-A (GB)
IPC: H01F27/42
Filed: 1968-07-23
Abstract: 1,226,174. Transformers. GENERALELECTRIC CO. 23 July, 1968 [31 Aug., 1967], No. 35008/68. Heading H1T. A voltage transformer, in particular an instrument transformer, comprises a core 18, a primary winding 12 and two parallel-connected secondary windings 20, 22, having different numbers of turns, whose respective resistances are selected, by appropriate choice of wire sizes, so that a predetermined no-load voltage transformation ratio and overall secondary resistance are obtained.
Patent GB-1229601-A (GB)
IPC: B07B13/00
Filed: 1968-03-28
Abstract: 1,229,601. Shucking bivalve shellfish. SLADE GORTON & CO. Inc. 28 March, 1968 [31 March, 1967; 17 July, 1967], No. 14975/68. Heading A2U. A method of shucking bivalve shellfish (e.g. scallops) comprises subjecting the shellfish to heat to relax the muscle which holds the shells thereof closed and subjecting the shellfish to a mechanical shock to open the shells and release the meat. In one embodiment (Fig. 1) shellfish of the desired size which have been separated from smaller shellfish and cleaned are passed to hopper 10 from which they are conveyed to shoot 18. The shellfish are subjected to a preliminary mechanical shock as they strike pivoted plate 20, heated in hot water bath 33 and subjected to a further mechanical shock as they strike pivoted plate 42 at the bottom of shoot 40 to open the shells 50 and release the meats 45. The meats are passed with the aid of water sprays 46 through screen conveyer 44 to conveyer 48 which supplies the meats to an eviscerating apparatus. In other embodiments the shellfish may be subjected to mechanical shock by projecting the shellfish against a surface by means of rotating blades, by subjecting the shellfish to a centrifugal force by means of a disc provided with blades, rotating in a casing, or by passing the shellfish between a pair of resilient rollers and throwing the shellfish against a surface. Suitable apparatus for separating and cleaning the shellfish and suitable eviscerating apparatus is claimed and described in Specifications 1,229,602 and 1,229,603 respectively.
Patent GB-1230032-A (GB)
IPC: C12N9/82
Filed: 1969-06-13
Abstract: 1,230,032. Process for purifying L-asparaginase. KYOWA HAKKO KOGYO CO. Ltd. 13 June, 1969 [24 June, 1968], No. 30150/69. Heading C3H. A process for purifying L-asparaginase obtained from the cultured cells of an L-asparaginase-producing micro-organism belonging to the genus Serratia comprises the step of heating the enzymatic liquid obtained from the culturing of said cells to a temperature of at least 60‹ C. thereby rendering ineffective the L- asparaginase-inactivating factors without substantially diminishing the enzymatic activity of the L-asparaginase. The heating may be at 60‹ to 80‹ C. for from 5 to 30 minutes at a pH of 8.5 to 11 in the presence of a trace of L- asparagine. The micro-organism may be Serratia marcescens A.T.C.C. 60.
Patent GB-1232065-A (GB)
IPC: G03B19/12
Filed: 1968-07-17
Abstract: 1,232,065. Single lens reflex camera. NIPPON KOGAKU K.K. July 17, 1968 [July 18, 1967], No.34123/68. Heading G2A. A single lens reflex camera has a shock absorbing mechanism for the viewing mirror when it is raised prior to exposure. Two embodiments are described; Fig. 3 (and Fig, 4 not shown). When the mirror 8 (104 Fig. 4) is reversed by a lever 3 (not shown in Fig 4), it eventually abuts a pin 10a (107a) and rotates a shock absorbing lever 10 (107) against the bias of a spring 11 (106) to provide a cushioning effect. Just before the mirror reaches its fully raised position, a latch 12 (111) which is disengaged from a stop pin 16 (103a) by the movement of the elements of the mechanism, is rotated by a spring 13 (110) into engagement with level 10 (107) to latch lever 10 (107) and prevent its returning the mirror. A parallelogram of levers, Fig.1  (not shown) operates the mirror.
Patent GB-1233071-A (GB)
IPC: B65D90/02
Filed: 1968-05-03
Abstract: 1,233,071. Tank shells. WHESSOE Ltd. 21 March, 1969 [3 May, 1968; 15 May, 1968; 7 Jan., 1969], Nos. 21200/68; 971/69; and 23177/ 68. Heading E1T. In a bulk liquid storage tank comprising a cylindrical shell made up from a series of superimposed courses with the lowest course joined to a bottom and each course consisting of metal plates joined to-gether at their vertical edges, the hoop strength of the lowest course (considered above) is less than that which would be required to withstand the pressure exerted thereon by the contents of the tank when full whilst the hoop strength of the remaining courses are adequate to withstand the pressures exerted upon them. In the above arrangement the hoop strength of the course next above the lowest is increased relative thereto by numerous means for details of which the Specification and drawings (not shown), should be referred to.
Patent GB-1250366-A (GB)
IPC: B23P19/00
Filed: 1969-10-02
Abstract: 1,250,366. Automatic screwdriving mechanism. K. WEBER. 2 Oct., 1969 [4 Oct., 1968], No. 48516/69. Heading B3N. An automatic fastener driving apparatus, particularly for screws, comprises a magazine 3 from which screws 6 are fed along a sorting and aligning deflector 5 to a rotary feed separator 7 and thence along a screw feed duct 8 to a screwdriving unit 9. The feed separator 7 incorporates a carrier 11 which has cams 11a and recesses 18. Area 18a of the recess acts as a screw supporting area and receives screws from the sorting and aligning deflector 5. The carrier rotates clockwise and as each recess is aligned with a pin 21, the pin pushes the corresponding screw inward so that it drops through area 18b of the recess into the screw feed duct 8. The pin 21 has bevelled edges which cooperate with similarly shaped edges on arms 11a so that each recess is accurately positioned above the entry to the screw feed duct. Screws are retained in the screw supporting areas by guides 19, 20. Rotation of the carrier is by a double acting piston and cylinder unit 16 through a pawl 17 and a ratchet wheel 15. The movement is timed according to the operation of the screwdriver unit 9. A supervisory unit 24 stops the apparatus when there is no screw in a recess. The units are mounted on a frame 1 which is adjustable vertically by a screwthreaded spindle 14 engaging a post 2. The carrier 11 and guides 19, 20 are changeable so that different size screws may be used.
Patent GB-1250559-A (GB)
IPC: H01L21/74
Filed: 1969-11-24
Abstract: 1,250,559. Semi-conductor element. COMPAGNIE GENERALE D'ELECTRICITE. 24 Nov., 1969 [29 Nov., 1968], No. 57467/69. Heading H1K. In a method of manufacturing a semiconductor element containing semi-conductor regions isolated by dielectric pockets, an insulating material containing a dopant impurity is applied to the surface of a semi-conductor body having projections and recesses, a second material is applied to the coated surface using a thermal technique during which the impurities diffuse into the body and the body is reduced in thickness from the surface opposite to the projections until the second material is reached. An N-type silicon body 1 doped with phosphorus has recessed and projecting portions formed therein. The portions are covered by a pyrolytically deposited layer 2 of silicon oxide containing arsenic. A polycrystalline silicon mass 3 is grown on the oxide surface by cracking silicon tetrachloride and whilst the mass 3 is grown, the arsenic in the oxide layer 2 diffuses into the silicon body 1 to give an N<SP>+</SP> layer 4. The body 1 is ground away to the line L to give individual semi-conductor devices 9, 10. The silicon oxide layer may be replaced by Al 2 O 3  or Si 3 N 4  whilst the semi-conductor body may also be Ge, GaAs or an A<SP>2</SP>B<SP>4</SP> compound. The insulating layer may be formed by cathode sputtering or vacuum deposition. It is possible to partially screen the semi-conductor body in such a way that the dopant does not diffuse in to it.
Patent GB-1251530-A (GB)
IPC: A63H33/30
Filed: 1968-12-20
Abstract: 1,251,530. Viewing devices. FISHER PRICE TOYS Inc. Dec.20, 1968 [Dec.21, 1967], No.19556/70. Divided out of 1,251, 529. Heading G2A. The description and drawings are identical with those of Specification 1,251, 529. The claims are directed to different combinations of structural features.
Patent GB-1258140-A (GB)
IPC: A43D49/00
Filed: 1969-09-19
Abstract: 1,258,140. Boots, &c. SHOE & ALLIED TRADES RESEARCH ASSOCIATION. 10 Sept., 1970 [19 Sept., 1969], No. 46390/69. Heading A3B. The out-turned flange on a pre-formed shoe upper is turned upwardly (as seen in Fig. 4) by placing the upper on a last 2 and effecting relative movement between the last 2 and a former 1 having a rim surface corresponding in shape to the outline of the last so that the former turns the flange upwardly, the flange then lying along the rim surface of the former as shown in Fig. 4. The former 1 may be provided with an overhanging portion (Fig. 5) which also turns the flange partially inwards. As described apparatus for performing the method includes a former 1 mounted on a frame F and a last 2 mounted on a rod 6 which is pivoted to pedal lever a. The upper is placed on the last 2 at loading position A and the last 2 is then swung by hand to position B where it is held by catch 5. The pedal a is then depressed which initially causes the last to move in a downward direction. After a predetermined delay caused by lost motion linkage 7 further movement of the pedal causes downward movement of rod 15b which operates toggle mechanism 17, 18 to move catch 5 inwardly so that the last 2 moves downwardly and towards the former 1. The combined movement of the last 2 downwardly and towards the former 1 causes the flange to be turned upwardly as shown in Fig. 4. The last 2 is later returned to its loading position by depressing pedal b. In a modification (not shown) after turning the flange upwardly the last is raised until the last bottom is level with the top of the former and the flange is then wiped across an insole on the last bottom by a pair of wipers mounted on the top of the former.
Patent GB-1265074-A (GB)
IPC: B29C48/08
Filed: 1969-06-07
Abstract: 1,265,074. Laminated and embossed films. HAGINO KIKO CO. Ltd., and MITSUBISHI PETROCHEMICAL CO. Ltd. 7 June, 1969, No. 28921/69. Headings B5B and B5N. A process for the production of laminated thermoplastic films having a multiplicity of independent air cells (Figs. 10 and 11, not shown) comprises the steps of extruding obliquely in a downwards direction two sheets of molten thermoplastic film simultaneously and continuously from a die mounted on an extruder, engaging one of said molten films with an endless moulding belt formed with a multiplicity of holes, forming a multiplicity of projections by sucking portions of said film into the holes in the belt and pressing and bonding the other molten thermoplastic film to the flat surface of the first film where the projections have not been formed. Apparatus suitable for the process of the invention (Fig. 2) comprises an extruder 1 with a die 6 containing two parallel extrusion slits 7 and 8. Films are extruded simultaneously from the two slits and contact an endless belt 12, which contains a multiplicity of perforations and is driven round suction roller 9 by mounting and cooling roller 11, where portions of the film 16 (Fig. 3) extruded from the slit 7 are sucked into the holes in the belt and momentarily afterwards the film 17, extruded from slit 8, is pressed against the flat surface of the embossed film 16 to form a laminate 71. The holding and cooling roller 10 serves to urge the two films together, the embossed laminated film passing between it and the belt 12, round the roller 10 and along the apparatus to the take-up roller 58. The rotatably mounted suction roller 9 comprises a perforated cylindrical drum surrounded by a wire gauze 26 and containing a suction box 19 of U-shaped cross-section connected along its length to a hollow shaft 18 which, in turn, is connected to a vacuum source via suction pipe 36. In other embodiments of the apparatus (Figs. 12 and 13, not shown) the two films are urged together by a jet of compressed gas in place of the roller 10 and cooling liquid is passed between molten film 16 and the endless moving belt 12. An example relates to the production of a laminated embossed sheet of polyethylene.
Patent GB-1265334-A (GB)
IPC: B60N2/70
Filed: 1969-02-25
Abstract: 1,265,334. Seat upholstery. ETABS BERTRAND FAURE. Feb.25, 1969 [Feb.27, 1968], No.10092/69. Heading A4M. A seat or backrest cushion is formed from separate, inter-connected, resilient blocks of foamed plastics or fibrous material, comprising a central slab 1a and two firmer side slabs 2a, each side slab 2a having a tapered projecting portion 5 which overlies a marginal zone 6 of the central slab 1a, the marginal zone 6 being disposed at a level below the upper surface of the central slab 1a and the juxtaposed faces of the slabs 1a, 2a being of complementary zig-zag profile. The slabs 1a, 2a are secured together by sticking or by spring clips 7 engaging seatings 8. The exposed surfaces of the slabs 1a, 2a have a covering skin 4. An additional slab 3a or 3b which is more resilient than the central slab 1a may be provided at the front of the seat or at the top of the backrest. The side slabs 2a may form parts of a V-shaped or rectangular slab. The periphery of the central slab 1a is supported directly on a rigid rectangular frame 13 carrying springs 10 which also support the central slab la.
Patent GB-1265396-A (GB)
IPC: G11B15/32
Filed: 1969-04-21
Abstract: 1,265,396. Feeding record tapes. MINNESOTA MINING & MFG. CO. 21 April, 1969 [22 April, 1968], No. 20306/69. Heading G5R. In a reel-to-reel tape transport the two reels are driven respectively by two wheels 21, 28 individually mounted adjacent to opposite ends of a rotatable helix 31 on which a disc 32 is threaded for axial movement along the helix upon relative rotation between the disc and the helix, so that rotation of the helix 31 by means of a drive shaft 29 from a reversible motor 19 causes the disc 32 to move into frictional driving engagement with one of the wheels 21, 28, thereby driving the take-up reel, and the cessation of rotation of the helix 31 causes the disc 32 to move into frictional braking engagement with the other wheel, thereby braking the supply reel. The wheels 21, 28 may be coaxial with the helix 31 and disc 32, Fig. 3, and drive the reels by means of belts (23, 26, Figs. 1 and 2), or they may be mounted directly on reel spindles which extend perpendicularly to the axis of the helix and disc (Fig. 5).
Patent GB-1290265-A (GB)
IPC: G09F13/16
Filed: 1970-02-23
Abstract: 1290265 Lighting display WESSEX FINE ARTS Ltd 12 May 1971 [23 Feb 1970] 8641/70 Heading F4R  A display unit comprises a movable support, a motor for moving the support, a plurality of reflectors mounted on the support so as to be individually and independently movable relative to the support and a socket for a light source. The unit displays a plurality of moving coloured areas on a back projection screen, a wall or a ceiling. In an embodiment a wooden frame box (1, Figs. 1 and 2, not shown) has a screen (2) formed of clear or patterned plastics or glass and encloses a light source (3) of variable intensity fed by a transformer (4). A domed cork support 6 within the box is driven very slowly by a motor (5) also fed by the transformer. The support may also be triangular, spherical or cylindrical. The support 6 has differently coloured anodized reflective discs 8 mounted loosely on pins 7. The random movement of the discs may be affected by natural or induced vibration, magnetic fields or ambient temperatures. In alternative embodiments, the screen (2) is replaced by a remote reflective screen. Fresnel lenses are used in association with the screen or a system of reflectors are provided behind and adjacent the support.
Patent GB-1295759-A (GB)
IPC: B65D90/56
Filed: 1970-05-29
Abstract: 1295759 Discharging hoppers DECCA Ltd 14 July 1971 [29 May 1970] 26048/70 Heading B8S Articles are delivered from a hopper 10 to a support 18 by a flexible pocket 14 the capacity of which is varied by a roller 15 to which the end of the pocket is attached. The roller is eccentrically mounted. A horizontal bar over which the member 14 is movable laterally may replace the roller 15. The delivery of articles is controlled automatically by a paddle 24 which operates a switch 23 when it rotates clockwise due to the absence of articles on the support 18. Alternatively the support 18 may be connected to a weighing device which controls the feed of articles.
Patent GB-1297379-A (GB)
IPC: H02P3/22
Filed: 1969-12-04
Abstract: 1297379 Automatic control of speed SEVCON ENG Ltd 4 Dec 1970 [4 Dec 1969 22 Dec 1969] 59330/69 and 62338/69 Heading G3R [Also in Divisions H2 and H3] A polyphase wound rotor induction motor is dynamically braked by disconnecting its stator 40 from the supply 44 and energizing at least one of its stator windings with rotor current, rectified at 48, and controlled by a variable markspace ratio pulse controller. The controller comprises a main thyristor 90 and also operates during driving to vary the effective rotor resistance by alternately short and open circuiting the rotor windings. Thyristor 90 is periodically triggered by an oscillator 112 whose frequency is controlled by a voltage derived from a transistor circuit, Fig. 5 (not shown) in which comparison is made between the rectified output of a tachogenerator and a reference voltage. This circuit also effects energization of contactors 42 and 126; when the speed is below reference value these are energized for driving, whereas when it is above they are de-energized so that the stator is disconnected at 42 and two of its windings 120, 122 are connected in parallel, via 126 and  thyristor 90, across rectifiers 48. Winding 124 is short circuited. The comparator circuit can be over-ridden to provide a maximum driving speed. Thyristor 90 is turned off by a commutating thyristor 98, triggered by a circuit 118, Fig. 4 (not shown), responsive to the voltage across commutating capacitor 94. Thus the pulse length depends upon the rate at which this is charged by the rotor current. An auxiliary supply on terminal 116 maintains operation when this is low. A smoothing circuit comprises a capacitor 72 and inductor 70. During driving, 72 is charged by the rotor current when 90 is off via an auxiliary thyristor 82 (contacts 78 being closed by the comparator circuit), and is discharged via the path 74, 76, 78, 92 and 90 when 90 is triggered on. The charge on 72 is also transferred to commutating capacitor 94 via 100, 102, 96. After commutation the charge on 94 is reversed by the inductance of the circuit, and by the rotor current (82 now being turned off by the charge on 72). When this reverse charge is sufficient, the voltage across diode 80 and thyristor 82, detected by circuit 114, causes 82 to be triggered on and the cycle is repeated. During braking contacts 78 are opened, 72 discharges into the stator winding when 90 is on and recharges from the rotor current, via the stator, when 90 is off. Thus both charging and discharging of 72 assists dynamic braking.
Patent GB-1297405-A (GB)
IPC: D04H1/435
Filed: 1970-05-08
Abstract: 1297405 Non-woven felt EDWARD W ANDREW Ltd 21 April 1971 [8 May 1970] 22228/ 70 Heading D1R In a process for making a non-woven felt consisting wholly or partly of high shrink and heat-shrinkable fibres, the felt is substantially prevented from shrinking along its length and width during the application of heat. In the described process a batt 12 of shrinkable fibres is passed twice between a heated rotating bowl 10 and a moving web 14 so as to subject both batt surfaces to bowl heat, the batt being restrained so as to shrink only in thickness. The batt may be needled before heating. The production of non-woven felt from batts of polyester fibre is exemplified. To form a filter, the matt may be needled before heating to a layer of fibres of coarser denier than the high-shrink fibres.