baber/WOPTO huggingface dataset:
Patent GB-1458475-A (GB)
Title: Ac to dc conversion systems
IPC: G01R19/02
Filed: 1974-09-06
Abstract: 1458475 Voltage measuring SOLARTRON ELECTRONIC GROUP Ltd 12 Sept 1975 [6 Sept 1974] 39040/74 Heading G1U An rms voltage measuring circuit comprises two self-balancing loops which share a common amplifier 16, Fig. 1, in the first loop the input A.C. voltage V in  is amplified 16 by a factor G, filtered 24 to remove any D.C., converted to a corresponding D.C. voltage Vd, by an rms converter, where Vd = k G (V in ) rms, k being a constant, and then, together with a reference voltage V r , applied to a differential amplifier 34 which controls the gain of the amplifier 16; and in the second loop a D.C. voltage V out  is amplified 16 by a factor AG (A being a constant determined by the amplifier 16), filtered 39 to remove the A.C., and then, together with the voltage Vd, applied to a differential amplifier 42 which produces the voltage V out . Assuming that the gains of the differential amplifiers 34 and 42 are sufficiently high, it can then be shown that for the overall system V out  = (k/A) (V in ) rms, and that providing G has a sufficiently large range of variation G V in . which is the input to the rms converter, is maintained substantially constant. Thus, whilst the input voltage V in  lies in a range determined by the extreme values Gmin and Gmax of G, the rms converter 28 operates at a fixed point which can be chosen to be at the centre, say V c , of its linear range - and only when V in  falls outside this range - i.e. the range V c /Gmax # V in  # V c /Gmin, will the input to the rms converter 28 depart from its central value V c , and the extent of the departure will be scaled by Gmin or Gmax as appropriate. Thus, the system effectively extends the dynamic range of the rms converter 28 typically by a factor of 100, i.e. typically (V in ) max can be as large as 100,000 (V in )min, rather than just 1000 (V in )min. A practical circuit diagram is described using operational amplifiers Fig. 2 (not shown).
Patent GB-1017638-A (GB)
Title: Slide-changing device for still picture projector
IPC: G03B23/04
Filed: 1963-10-02
Abstract: 1,017,638. Slide charging apparatus. AGFA A.G. Oct. 3, 1963 [Oct. 6, 1962], No. 39057/63. Heading G2J. In a slide changing device for a still projector, slides 5 progress from left to right in Fig. 1 as each is moved from the U-shaped holder a magazine 6 to the projection position 24 and back by means of a slider 15, the returning slide being guided to position 5c on the opposite side of block 3 by a switch point member 11 pivoted to the block at 9 and controlled by external handle 12a. The projection sequence may be reversed at any time by moving lever 12, and hence member 11, to its other pivoted position when slides are returned to the 5a position. The pivot 9 is fixed with the projector housing and, as lever 12 moves between its two positions, block 3 slides in the keyway 2a which it engages by key 3a. The slides 5 are held on each side of block 3 by spring 8. and pressure plate 7, and as projection continues the slides move from left to right and their holder 6 slides to the right on bearing plate 2 on which it is retained by flange 26. Pin 18 of slider 15 carries each slide to the projection position, flange 16 returning each slide to holder 6. Slider 15 moves on shaft 14 and may be manually or motor driven.
Patent GB-1474910-A (GB)
Title: Sailing craft
IPC: B63H9/08
Filed: 1974-08-14
Abstract: 1474910 Rigging P M BROUGH 14 Aug 1974 [17 Aug 1973] 39075/73 Heading B7 A sailing craft has a sail 1 hoisted to the top of a mast 4 by a halyard 8 and held in the raised position by the engagement of a shackle 6 on the sail with a hooked member 12 fixed to the mast. The shackle shown, Fig. 4, comprises parallel plates with wings 6a connected by cross pins 7, 9, 10, the pin 7 passing through a ring 5 in the sail headboard 2 and the pin 9 being connected to the halyard 8. During hoisting of the sail the pin 9 engages the underside of the hook member 12, whereby the shackle is deflected away from the mast 4 until the pin has passed the toe 11 of the hooked member. Thereafter a slight reduction in the tensioning of the halyard allows the pin 10 to engage the hook member 12, an elastic band 13 being held taut after the engagement. When the sail is to be lowered a pull on the halyard followed by rapid release allows the elastic band 13 to swing the shackle clear of the hooked member. The sail 1 rides in a luff groove 3 in the mast and in a second embodiment, Figs. 7 and 8 (not shown) the base of the groove provides an abutment for a leaf spring (45) riveted to the shackle and replacing the elastic band. In this embodiment the shackle is totally of bent sheet metal and is located in the luff groove 3, the hook member (41) being disposed within the mast and mounting a halyard pulley (37). A further embodiment, Figs. 5 and 6 (not shown) employs a wire torsion spring (20) instead of an elastic band.
Patent GB-1526281-A (GB)
Title: Method and means for causing a break in a structure
IPC: E04G23/08
Filed: 1975-09-25
Abstract: 1526281 Demolishing structures; replacing parts of structures K ASAKURA 25 Sept 1975 [25 Sept 1974] 39389/75 Heading E1S [Also in Division H5] Structures are manufactured in such a way that they can be broken, as a step, e.g. in demolition, by incorporating, at the base of the structure, e.g. (Fig. 4) a layer of a heatdestructible material 36 having embedded therein a heating device, e.g. a conductor, which when supplied with electricity, will cause the layer to be destroyed. In the embodiment of Fig. 1, a bridge deck jointing strip 25 is replaced by the use of sheets 13, 18 of plastics material, with conductors embedded therein, these sheets being positioned between the bridge deck 10 with its asphalt topping 12 and a reinforced strip 20 supporting the jointing strip. In the embodiment of Fig. 4, the removal of a wall 33 surrounding a pier 30 is facilitated by destroying a sheet 36 separating the wall from a caisson 31.
Patent GB-1393240-A (GB)
Title: Support bearing for electricity meter
IPC: G01R11/12
Filed: 1973-08-14
Abstract: 1393240 Bearings for meters SIEMENS AG 14 Aug 1973 [14 Aug 1972] 39532/73 Heading F2A A bearing assembly for an electricity meter is characterized by a spring support 7 which is preferably of plastics and is removably attached to a hollow bearing centring member 2 by snap action of its resilient walls 14, 15 into a groove 13. The bearing centring member 2 is locked into a meter frame 1 by a screw 3 and has a guide sleeve 11 held against its centring surface 4 by a spring 5 which rests on the spring support 7. Within the guide sleeve 11 is a thrust bearing which supports a rotor shaft 6 and consists of jewels 9, 10 and a ball bearing 8. To provide resilience, the spring support has slots 16 and recess 17.
Patent GB-1353233-A (GB)
Title: Shell moulding machine
IPC: B22C23/00
Filed: 1971-08-24
Abstract: 1353233 Moulding machines SHERWINWILLIAMS CO 24 Aug 1971 [22 Sept 1970] 39655/71 Heading B3F A foundry shell moulding machine includes a carriage 50, tooling platens 64, 87 mounted on the carriage for movement towards and away from each other a base 10 having an upstanding portion 11, a bearing 43 of a diameter larger than that of the carriage 50 and journalled in one end only of the carriage 50 for rotation of the carriage 50 about its horizontal axis. In operation, a blowhead 102 is located above a two-part gas-heated core-box 83, 85 and resin/ sand blown in to the box 83, 85. After sufficient sand has cured to form a shell core the carriage is inverted to return the uncured sand to the blowhead 102. The core-box halves 83, 85 are parted, leaving the core in the left-hand half 83. The platen 64 then swings on hinges 67 to render the core accessible for removal (see chain lines in Fig. 1). The platen is swung by a mechanism which is powered by a fluid motor 73, a rod 71 extending through the tie rod 54 (which supports the platens 64, 87) to transmit motion to the distal end of carriage 50 for swinging the platen. The actuator for unlocking the platen from the carriage before swinging similarly operates another rod within a tie-rod (55) to transmit motion to the distal end of the carriage 50.
Patent GB-975018-A (GB)
Title: Improvements in or relating to the fixing of the position of threads in warping
IPC: D02H13/16
Filed: 1960-11-18
Abstract: 975,018. Warping; uniting warp threads. MASCHINENFABRIK BENNINGER A. G. Nov. 18, 1960 [Nov.21, 1959], No.39760/60. Heading D1M. A flexible adhesive tape is applied across each end of a warp while the threads are spaced apart by a tease reed; the warp then passes through a guide reed which brings the threads close together for winding on a beam. The threads can subsequently be spread apart to the extent determined by the tape for manipulations such as threading healds and joining a new warp to an old one. The latter operation is effected by superimposing the tapes 12<SP>1</SP>,12<SP>11</SP> on the warps 1<SP>1</SP>,1<SP>11</SP> so that they stick together, then severing the tapes between the threads.
Patent GB-976698-A (GB)
Title: Improvements in or relating to the mounting of carrier rollers of metal cabinet drawers
IPC: F16C13/00
Filed: 1963-10-09
Abstract: 976,698. Drawers. SOC. CIVILE DE RECHERCHES ET D'ETUDES INDUSTRIELLES. Oct. 9, 1963 [Oct. 10, 1962; Aug. 30, 1963], No. 39876/63. Heading A4B. The carrier rollers 2 of a drawer are each fitted on to a journal 1 mounted on the wall 5 of a drawer or cabinet and which has an enlarged end portion 3, the roller hub 4 being fitted thereover by momentary elastic deformation. In a modification the journal 1 receives two punch strokes to cause swollen portions 9.
Patent GB-958745-A (GB)
Title: Methods of constructing subterranean storage cavities
Inventor: SHOCK D ARCY ADRIANCE
IPC: E04H7/02
Filed: 1962-10-22
Abstract: 958,745. Soil stabilisation. CONTINENTAL OIL CO. Oct. 22, 1962 [Dec. 4, 1961], No. 39937/62. Heading E1F. [Also in Division F4] An underground storage chamber 22, preferably for the storage of liquefied petroleum gas, is formed by producing in the earth one or more substantially horizontal, water impervious layers 18 of the earth by freezing or soil-stabilizing techniques, the layer or layers extending to a water-impervious, vertical continuous zone 20 which constitutes the side walls of the chamber when the soil between the layer or layers and the vertical zone is excavated. The horizontal layers are formed by sinking a boring tube 12 down to a required level and pumping either a fracturing fluid, a soilstabilizing media, or a refrigerant out of the tube according to the condition of the soil. The vertical zone is preferably created by the use of freezing tubes 10.
Patent GB-1018932-A (GB)
Title: Storage media for use in electrophotography
IPC: G03G16/00
Filed: 1961-12-29
Abstract: 1,018,932. Electrophotographic materials. GENERAL ELECTRIC CO. Dec. 29, 1961 [Dec. 29, 1960], No. 40100/65. Divided out of 1,018,931. Heading H1K. A heat-deformable photo-conductive material comprises an electrically insulating support and a photo-conductive thermoplastic layer upon which an electrostatic charge pattern may be formed and which is deformable by the electrostatic charges upon heating of the photoconductive layer. The material may also contain an electrically conductive layer preferably between the support and the photoconductor. The thermoplastic layer itself may be photo-conductive, e.g. a polyphenyl which may be substituted by halogen, amine, sulphuroxide and nitrogen-oxide moities or may contain a photo-conductor such as sulphur, selenium, or phosphors, cyanines and organic dyes. The preferred thermoplastic binder is a mixture of polystyrene, m-terphenyl and a copolymer of 95 wt. per cent of butadiene with 5% of styrene. Another suitable composition is a mixture of equal parts of anthracene and a low molecular weight polystyrene. The electrically conductive layer may be a metal, a metal oxide or a metal salt layer such as a cuprous iodide layer. The support should preferably be optically transparent and is a polyester, a polycarbonate or an epoxy resin. The material is preferably used in the method for recording information given in Specification 1,018,933 in conjunction with the apparatus of Specification 1,018,931.
Patent GB-1058339-A (GB)
Title: Process for the production of polyurethane resins
Inventor: KEBERLE WOLFGANG
IPC: C08G18/08
Filed: 1965-09-21
Abstract: Modified polyurethane resins are prepared by reacting at 20 DEG  to 150 DEG  C. predominantly linear polyurethanes of M.W. 5,000 to 2,000,000 prepared from compounds having two or more reactive hydrogen atoms and a molecular weight of 300 to 10,000, polyisocyanates and if desired, chain-lengthening agents containing reactive hydrogen atoms with cyclic compounds having 3 to 7 ring members which contain salt-like groups, or produce salt-type groups, or groups capable of salt formation after ring opening, and the salt-forming groups, if present, being at least partly converted into salts by reaction with organic or inorganic bases.  The preferred compounds containing two or more reactive hydrogen atoms are polyesters, polyethers, polyacetals, polythioethers, polyamides and polyester-amides.  Conventional aliphatic and aromatic polyisocyanates may be used including partly masked polyisocyanates. Suitable chain-lengthening agents are saturated and unsaturated glycols, monoand dihydroxyalkylated primary amines, organic diamines, amino alcohols, dicarboxylic acids, aminocarboxylic acids, water and ammonia. The polyurethanes to be modified preferably contain free primary and/or secondary hydroxyl and/or amino groups.  Suitable cyclic compounds for reaction with the polyurethanes are dicarboxylic acid anhydrides, tetracarboxylic acid dianhydrides, disulphonic acid anhydrides, sulphocarboxylic acid anhydrides, sultones, lactones, epoxycarboxylic acids, epoxysulphonic acids if desired in the form of their salts as well as the adducts of epoxyaldehydes with metal hydrogen sulphites, 2,4 - dioxo - oxazolidines, isatoic acid anhydrides, phostones and cyclic reaction products of olefines with sulphur trioxide.  Especially suitable cyclic compounds are 1,3-propane sultone, succinic, anhydride, b -propiolactone and 1,4-butene sultone.  The reaction may take place under pressure in the presence of a solvent and a basic catalyst.  When a basic catalyst is used, groups capable of salt formation are converted into the salt form in situ. In other cases, the groups are converted at least partly into salts by organic or inorganic bases.  Any solvent which is present may be removed at room or elevated temperature, or it may be replaced by water.
Patent GB-1246351-A (GB)
Title: Muffle kiln for the firing of ceramic ware
Inventor: POPPI MAURO
IPC: F27B9/06
Filed: 1969-08-12
Abstract: 1,246,351. Tunnel kilns. M. POPPI. 12 Aug., 1969 [21 March, 1969], No. 40230/69. Heading F4B. A tunnel kiln for firing glazed ceramic tiles, is provided with both muffled combustion chambers 5, and direct firing lateral gas or oil burners 1 arranged in opposed pairs. Gases from the burners pass through honeycombed refractory blocks 2 on the decks of the kiln cars 3 and then rise through gaps 6, 7 past the tiles to be fired. About 10% of the total fuel supply is supplied to the burners 1. One burner of an opposed pair may be turned off.
Patent GB-858408-A (GB)
Title: Improvements in or relating to the stilting of mine arches
Inventor: POTTER JOHN JAMES
IPC: E21D11/22
Filed: 1958-06-10
Abstract: The tensioning tool described is identical with that described in Specification 858,407.  The claims concern mini-arches.
Patent GB-1451234-A (GB)
Title: Dispersion alloy product
IPC: C22C27/04
Filed: 1973-08-28
Abstract: 1451234 Thoria-W dispersion alloy GENERAL ELECTRIC CO 28 Aug 1973 [1 Sept 1972] 40424/73 Headings C7A and C7D A thermally treated and mechanically worked alloy member consisting of a recrystallized tungsten grain structure the crystals of which are minute equi-axed particles and 1 to 2 wt. per cent of thoria particles having a size smaller than the size of said tungsten particles and being distributed in a uniformly diminishing concentration gradient which has the maximum concentration located at the exterior surface of the alloy member and does not display a sharp variation of concentration of thoria particles along the concentration gradient is produced by soaking a porous compact of tungsten particles in an inert solvent for a thorium compound (e.g. distilled water) and then immersing the solvent filled compact in a solution of the thorium compound (e.g. thorium nitrate) for a sufficient time to permit diffusion of the thorium compound into the solvent contained in the pores of the compact, removing the compact from the solution and drying (e.g. in a vacuum oven at 130F) to retain a bulk thoria content of 1À9%. The compact may then be presintered at 1200C in hydrogen for 2 hours to convert the thorium nitrate to thoria and may be sintered by passing on electrical current therethrough. The compact may then be rolled, swaged, drawn to wire form and recrystallized by passing on electric current through the wire in a hydrogen atmosphere to maintain a temperature of 2650C for 6 hours. The wire product may be used as a filament for electric lamps and electronic tubes. REFERENCE HAS BEEN DIRECTED IN PERSUANCE OF SECTION 9, SUB SECTION (1) OF THE PATENTS ACT 1949, TO PATENT NO 1392837.
Patent GB-983110-A (GB)
Title: Improvements in or relating to an adaptor for use with underwater television camerasor moving cameras, particularly in muddy waters
IPC: F21V29/00
Filed: 1961-11-13
Abstract: 983,110. Apparatus for underwater illumination. H. HUNGER, [trading as IBAK H. HUNGER [Firm of]]. Nov. 13, 1961 [May 10, 1961], No. 40542/61. Heading F4R. A lamp for underwater cameras, e.g. for television or kinematography, comprises a source of light consisting of a body member and one or more lamps arranged in relation to the body member so as to extend around the viewing angle of the camera lens without lying within the viewing angle. A glass or synthetic resin panel 3 having a concavity facing the camera lens 1 is arranged between the lens and a block 4 of light-permeable material secured to the camera housing. The space 8 between the panel 3 and the block 4 is filled with liquid. The opposite surfaces of the block are plane and a groove 13 is provided in the block outside the viewing angle of the lens to receive a lamp 12. The groove 13 has a semi-translucent reflecting layer 16 and a similar layer is provided on the surface of the block adjacent the groove to produce even illumination. The block is enclosed in a shield 17 spaced from the block and having a reflecting surface. The edges of the shield may be protected by a ring of plastic 20 which may be spring-mounted to enable the block to be brought close to the object to be viewed. In place of the ring 20, a ring of cavities enclosing spring-mounted bristles may be provided. When in use in muddy water, clear water may be fed from a pipe 25 into the space between the block 4 and shield 17 and will then pass across the front surface of the block. A pendulum or bubble indicator may be provided to indicate the inclination of the apparatus to the vertical, the indicator being located within the viewing angle of the lens.
Patent GB-1314058-A (GB)
Title: Antimicrobial oxazolidine derivatives
IPC: C07H15/236
Filed: 1970-08-24
Abstract: 1314058 Disinfectants containing gentamicin derivatives SCHERICO Ltd 24 Aug 1970 [25 Aug 1969] 40588/70 Heading ASE [Also in Division C2] Disinfectant compositions comprise a gentamicin derivative having an oxazoliden ring fused to the garosamine ring of the gentamicin molecule in solution in a volatile solvent. Bandages may be impregnated with a solution of the said gentamicin derivative in a suitable solvent (e.g. petrolatum) to render them antibacterially active.
Patent GB-892032-A (GB)
Title: Improvements in and relating to electromagnetic disc clutches or brakes
IPC: F16D63/00
Filed: 1959-11-30
Abstract: 892,032. Friction clutches. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. Nov. 30, 1959 [Dec. 15, 1958], No. 40683/59. Class 80 (2). [Also in Groups XXXIV and XXXV] The pole structure of an electromagneticallyoperated disc clutch or brake comprises interengaging annular members 6, 7 with radial flanges adjacent the discs 8, 9 shaped to form interfitting lugs 12, 13 constituting a circumferential series of polepieces of alternating polarity. The lugs may, as shown, be integral with the ring portions 6, 7, or may be separate lugs secured thereto, Figs. 6 and 7 (not shown). Gaps 18, 19, 20 are provided between the poles and these may be filled with non-magnetic material. One set of friction discs, e.g. the discs 8 secured to the member 6 by lugs 23, are formed with slots 30, Fig. 4, in longitudinal alignment with the gaps 18, 19.
Patent GB-1154560-A (GB)
Title: Grid Structure for a Suspended Ceiling.
IPC: E04B9/08
Filed: 1966-09-12
Abstract: 1,154,560. Suspended ceilings. ARMSTRONG CORK CO. 12 Sept., 1966 [10 Sept., 1965], No. 40694/66. Heading E1W. The cross beam 5 of a suspended ceiling grid has an end extension 10 which engages an aperture 17 in the web of the main beam 15 in which it is positioned by a notch 11, the extension having a portion 12 sloping from said notch and serving to cam the end of the beam 5 upwardly by thrusting against the bottom of the aperture 17 as the beam 5 expands, thereby lifting the end of the beam 5 clear of the flange 18 of the main beam so that unrestricted continued expansion of the cross beam may take place. The cross beam also comprises a stop 13 which co-operates with the web 16 of the main beam and which is deformed as the cross beam expands. The main beam incorporates an expansion joint between main and adjacent main beam sections 15, 15' in which a splicing plate fixed to the section 15' and slidable along the section 15 carries a tab 24 which upon expansion acts upon a cam structure 27 formed at the end of the section 15 and deflects the flange 18 downwardly about a notch 26 to open up the joint J so that expansion of the main beam can be absorbed. In a further embodiment a further notch, Fig. 6, (not shown) in the connector portion 10 of the cross beam 5 is provided to prevent accidental dislodgment during installation. In another modification, Fig. 7 (not shown) the stop 13 is offset at an angle.