baber/WOPTO huggingface dataset:
Patent GB-1487485-A (GB)
Title: Method of forming a catalytic layer
IPC: H01M4/98
Filed: 1975-01-21
Abstract: 1487485 Fuel cell electrodes SIEMENS AG 21 Jan 1975 [5 Feb 1974] 2661/75 Heading H1B A method of forming a catalytic layer suitable for use as an electrode comprises providing a layer of homogeneous alloy consisting of a first component comprising at least one metal selected from Ru, Rh, Pd, Os, Ir and Pt, a second component comprising at least one metal selected from Fe, Co and Ni, the alloy initially comprising at least 65 atom per cent of the second component, and removing second component from the alloy to form the desired catalytic layer. The platinum group metals may be doped with Bo, Si, Ti, Zr, Nb, Ta, Mo and/or W, Cu and/or Av. The removal of the inactive second component is achieved by etching the alloy with HNO 3 , H 2 SO 4  or HCl at room temperature to form the microporous catalyst layer. Alternatively the inactive component is removed electrochemically. In a modification a Pt/Ni foil is sintered to each side of a Pt foil, the Pt/Ni foils then being treated to form the catalyst layers. The electrodes may be used in fuel cells in which glucose is oxidized to provide power for operating an artificial heart or in methanol-air fuel cells.
Patent GB-1533525-A (GB)
Title: Thermal airships
IPC: B64B1/02
Filed: 1977-01-24
Abstract: 1533525 Thermal airships RAVEN INDUSTRIES Inc 24 Jan 1977 [23 Jan 1976 3 Feb 1976 25 March 1976] 2778/77 Heading B7W A thermal airship has an elongate gas envelope 10 and inflatable hollow tail members 14, 15, 16, 17 pressurized with heated air, the tail members being movable relative to the envelope for controlling the horizontal flight.
Patent GB-1249225-A (GB)
Title: Circuit arrangement for the input and output of information
Inventor: DEILMANN PETER
IPC: G11B5/02
Filed: 1969-01-17
Abstract: 1,249,225. Magnetic drum data stores. KOMBINAT ZENTRONIC VEB. 17 Jan., 1969, No. 2793/69. Heading G4C. [Also in Division H3] A matrix-type head-selecting arrangement, e.g. for a magnetic drum store, uses writing, reading and switching amplifiers to which selecting voltages can be applied, each switching amplifier having an input transistor controlling two transistors of opposite polarity types. In Fig. 1, for writing or clearing, one of 24 heads AWK1. . . AWK24 is selected by enabling one of 6 writing amplifiers SPV1 . . . SPV6 with a selecting voltage at Z1 . . . Z6, and one of 4 switching amplifiers SV1. . . with a selecting voltage at S1 . . . . For reading, one of the heads is selected by enabling one of 6 reading preamplifiers HV1 ... HV6 with a selecting voltage at Z1 ... Z6, and one of the 4 switching amplifiers SV1 ... as before. A final reading amplifier EV is provided for output. Fig. 2 shows a switching amplifier, in which the selecting voltage at S enables or disables a transistor T1 to disable or enable respectively both of two mutually-complementary transistors T2, T3, the emitters of which are earthed via AE and the collectors of which are connected to the relevant heads at AC. Oppositely-poled diodes D49, D50 carry current during writing and clearing/reading respectively. Application to automatic invoicing, book-keeping and accounting machines is mentioned.
Patent GB-166862-A (GB)
Title: Improvements in machines for wrapping-up caramels, or analogous articles
IPC: B65B11/18
Filed: 1920-04-26
Abstract: 166,862. Rose, W. H. (Representative of Rose, H.), and Rose Bros. (Gainsborough), Ltd. April 26, 1920. Endless-chain push-plate conveyers.-A conveyer particularly for carrying caramels to a wrapping-machine such as that described in Specification 150,076, [Class 94 (i), Packing &c.], comprises a stationary trough or shelf a below which moves a chain b provided at intervals with pusher-pieces b<2> which extend upwards at the - side of the trough bottom or shelf and overlap it.
Patent GB-342133-A (GB)
Title: Improvements in or relating to electro thermal overload switches
IPC: H01H71/20
Filed: 1930-01-28
Abstract: 342,133. Automatic circuit-breakers ; protective cut-out systems. KUHN, C. W., 5324, 36th Street, Milwaukee, Wisconsin, U.S.A. Jan. 28, 1930, No. 2936. Convention date, June 24, 1929. [Class 38 (v).] A-control system for an electric motor or other device comprises a thermallyreleased overload cut-out and "starting" and "stop" push-button switches, depression of the latter serving to re-set the cut-out switch. Fig. 8 shows the system for controlling a motor M, the " starting " switch 2, the " stop " switch 3 and the cut-out 7, 8, being in series. Operation of " starting " switch 2 energizes the winding 60a of the contactor 60 closing the circuit to the motor and also a maintaining circuit for the winding 60a through a contact 60b. The cut-out comprises two members 7, 8 pivoted at two points 9 and biassed by a spring 26 between them in such a manner that contacts 24 carried by the members tend to move out of engagement with fixed contacts 5, 6. The spring 26 also serves to connect the two contacts 24 electrically. Each member 7, 8, carries a pawl 28 engaging a ratchet wheel 20 soldered to a fixed cup-shaped member, the arrangement being such that the pawls slide over the ratchets when the members 7, 8 are being re-set, but retain the members 7, 8 in contact making position till the solder is melted bv surrounding heating coils upon overload, when the contacts 24 move away from their contacts 5, 6 and break the circuit to the contactor coil 60a. The cut-out is reset by depressing the " stop " pushbutton which, in addition to carrying a bridging contact normally held in engagement with two fixed contacts, carries a cone 19 adapted to press apart the members 7, 8.
Patent GB-613131-A (GB)
Title: Improvements in and relating to cylindrical surface lapping machines
IPC: B24B33/02
Filed: 1946-06-30
Abstract: 613,131. Lapping - - machines. NILESBEMENT-POND CO. Jan. 30, 1946, No. 2956. Convention date, May 28, 1945. [Class 60] An internal or external cylindrical surface lapping-machine has a spindle 12 provided with a chuck 22 for holding a lapping tool 24; the spindle is rotated by a reversible hydraulic motor 14. The work W, such as an adjustable internal cylindrical gauge of relatively small diameter, is clamped within a holder 64 having diametrically opposite arms 66, the upper one of which engages within resiliently supported bars 38 on an oscillating member 20, this member being oscillated coaxially with the spindle 12 by means of a segmental gear 28 acted on by a rack reciprocated hydraulically under control of a valve actuated by adjustable tappets on the oscillating member. The work is also traversed axially of the spindle 12 by means of a member 40 which is hydraulically reciprocated under control of a valve actuated by tappets on the reciprocating part; the member 40 carries a member 52 having a cylindrical portion 54, whereby it can adjust itself about a horizontal axis at right angles to the axis of spindle 12; the member 52 has two forked jaws 56 pressed together by a spring and receiving between them the work-holder arms 66, so that while the work-holder is caused to traverse with the member 52 it can oscillate with the member 20 the arms of the forked jaws 56 being of sufficient extent to permit this. The reciprocating member 40 has tappets actuating a valve for reversing the direction of rotation of the spindle 12. For lapping external cylindrical surfaces the work is mounted in the chuck 22 on the spindle 12, and the lapping tool is mounted in the holder 64. Specification 592,445 is referred to.
Patent GB-103027-A (GB)
Title: An Improvement in the Manufacture of Flower Pots, Seed Pans, and the like.
Inventor: EVANS CHARLES WILLIAM
IPC: A01G9/02
Filed: 1916-03-24
Abstract: 103,027. Evans, C. W., and Jacobson, J. March 24, 1916. Flowers and plants, pots and the like for growing; seed pans.-A flower-pot, seed pan, or the like of the type having a dome-shaped re-entrant base is provided with a comparative]y small central perforation e and side perforations f about the brow of the dome, the perforations f being provided with drainage gutters k to direct any water reaching the inner end of the perforations into the annular recess a at the bottom of the pot. Drainage grooves are also formed on the convex surface of the dome. Free access of air is provided for by holes h in the heel of the pot. In the modification shown in Fig. 5, the dome-shaped base is loose and fits into an annular recess formed by an upturned lip l at the base of the pot.
Patent GB-1405453-A (GB)
Title: Alignment and holding device and method
IPC: H01L21/68
Filed: 1972-01-22
Abstract: 1405453 Vacuum workholders LUCAS ELECTRICAL CO Ltd 12 Jan 1973 [22 Jan 1972] 3152/72 Heading B3D [Also in Division B5] A device for aligning and holding a semiconductor wafer for a scribing operation comprises a hollow body having two opposed transparent surfaces 3, 4 one of which has a plurality of apertures 5 therethrough and a plurality of alignment marks 6 thereon, and conduit means 8 for enabling a reduced pressure to be produced in the hollow body so that a semi-conductor wafer to be scribed can be releasably attached to the apertured surface, the wafer to be scribed being aligned with the marks by viewing through the body and then attached by applying the reduced pressure. The body consists of an aluminium ring 2 closed at its end by discs 3, 4 of clear acrylic plastics material. The disc 4 is plain and the disc 3 is provided with the apertures 5 and alignment marks 6. An aperture 7 in the ring connects the interior of the body to the conduit 8, and a bore 9 engages a peg on the chuck of the machine to orient the device in the machine. In use, a semi-conductor wafer is held by suction on a plate (not shown) with its etched surface exposed, the etched surface containing a plurality of mesa diodes. The device is placed over the wafer with its apertured surface engaging the etched surface and is aligned therewith by viewing through the body. Suction is then applied through conduit 8 to hold the body against the exposed surface and the suction in the plate released so that the device with the wafer can be mounted in the machine for scribing. In another embodiment, the discs (3, 4) are of quartz glass and a plate replaces the locations hole (9).
Patent GB-524513-A (GB)
Title: Improvements in and relating to ceramic compositions
IPC: C04B33/13
Filed: 1939-01-31
Abstract: 524,513. Ceramic compositions ; wetting agents. MONSANTO CHEMICAL CO. Jan. 31. 1939, No. 3274. Convention date, Feb. 1, 1938. [Class 22] [Also in Group IV] Ceramic compositions are rendered more mouldable by the addition of a small quantity of a wetting agent consisting of an alkylated aromatic sulphonic acid in which the alkyl group contains more than 8 and less than 16 carbon atoms or a water soluble salt of such an acid. About 0.1-0.4 per cent. based on the water content is used.
Patent GB-571458-A (GB)
Title: Improved variable electrical resistance
IPC: H01C10/32
Filed: 1944-02-22
Abstract: 571,458. Variable-contact resistances. MORGAN CRUCIBLE CO., Ltd., and MILLER. L. W. Feb. 22, 1944, No. 3306. [Class 37] A variable resistance, particularly for volume control in radio reception and as a midget type control on aircraft, is constructed so as to withstand extreme conditions without undue variation. The casing comprises a part 1 and a part 3 carrying the segmental strip resistance element 4, the rotor contact 5, and terminals 6, 8. The part 3 of the casing is made of synthetic plastic material, whilst the other part 1 is of aluminium or aluminium alloy and is formed with an integral boss 11 providing a bearing for the operating spindle 2. The two parts 1, 3 are secured together by spinning the rim 13 of the part 1 over a flange 14 on the part 3 after inserting a sealing ring or washer 15. The spindle 2 carries a contact operating member 9 of synthetic plastic material moulded on a metal piece 16. This has an axial hole 17 into which is forced a knurled part 19 on the reduced end of the spindle 2, a groove 18<1> being provided into which the metal piece 16 is swaged. The spindle is fitted in an annular recess 20 with sealing rings 21 to make the bearing in the bush fluid-tight. The member 9 is formed with an extension 22 adapted to abut against a projection 23 in the part 1 to limit the rotation of the spindle. The rotor contact comprises a flat metal ring 24 indented to form a projection 5 for bearing on the resistance element 4, and having a leaf 25 extending radially inwards from the point 26 on the ring diametrically opposite to the projection 5, and provided with a central pivot hole. The rotor contact is rotatably mounted by means of a rivet 27, the radial leaf 25 being pressed against the underside of the rivet head 35 by a spring washer. The plane of the ring portion 24 of the rotor contact is inclined to that of the radial leaf 25 so that the projection 5 bears with spring pressure on the resistance element 4. This is secured at its ends on the inside face of the part 3 of the casing by rivets 33, the outside heads of which and of the central rivet 27 are clamped on terminals 6, 8. The head 35 of the rivet 27 is rounded and fits with clearance in a corresponding recess in the actuating member 9. The radial leaf 25 of the rotor contact engages at 10 in a corresponding radial slot 37 in the actuating member 9. The head of the member 9 is otherwise snugly accommodated within the ring portion 24 of the rotor contact without touching it, so that it does not interfere with the springing of this ring portion.
Patent GB-525560-A (GB)
Title: Improvements in starting devices for internal combustion engines
IPC: F02N15/06
Filed: 1939-02-01
Abstract: 525,560. Securing pinions on shafts. BENDIX AVIATION CORPORATION. Feb. 1, 1939, No. 3445. Convention date, Feb. 3, 1938. [Class 80(ii)] [Also in Group XXVII] In an engine-starter drive comprising a driving member 2 movable into and out of mesh with an engine gear 3 and a connection between the power shaft 1 and the member 2 including a body 14 of elastically deformable material, the elastic body 14 is frictionally engaged externally and internally by transmission member 11, 15 and is compressed radially between the members 11, 15 in response to the torque transmitted to tighten the frictional engagement. As shown, the member 2 is a pinion connected by a barrel 27 to a nut 22 threaded on a screw shaft 7 in order to move the pinion axially into mesh with the engine gear 3. The member 15 is a split sleeve having cam faces 19, 21 engaged by cams 9, 18 on the shaft 7 and on the driving head 5 on the shaft 1, whereby the sleeve 15 is expanded radially to compress the body 14 when the pinion 2 is fully in mesh. The surfaces of the members 11, 15 are roughened or ribbed to engage the elastic body 14. An anti-drift spring 24 and a re-entry spring 26 are provided in the barrel 27. In a modification, the transmission member 11 is secured on the driving head 5 by a split ring to allow its removal without dismounting the drive, and the split sleeve 15 is expanded by a tapered head on'the screw shaft 7. In a further modification, the elastic body 14 itself has a tapered bore engaged by a correspondingly shaped split sleeve expanded by a conical head on the screw shaft. In the modification shown in Fig. 8, the elastic body 14c has a tapered bore engaged by a thrust member 35 having a radial flange 36 fitting in the barrel 11c and a tapered portion 37 connected with the tapered end 9c of the screwshafts 7c by radial projections on the end 9c engaging slots in the portion 37. The body 14c is thereby compressed axially as well as radially.
Patent GB-836192-A (GB)
Title: Improvements in or relating to the manufacture of barium hydroxide
Inventor: HOLMES WILLIAM RAYMOND
IPC: C01F11/02
Filed: 1956-02-03
Abstract: Crystalline hydrated barium hydroxide is prepared by spraying molten hydrated barium hydroxide into air or other inert gas at a lower temperature.  The molten material may be delivered to a rotating disc or a compressed-air nozzle and the spray passed into a spraying chamber cooled by natural or forced air convection. Before spraying, the molten hydrate may be freed from insoluble material by filtering and/or sedimentation.  Suitable molten hydrates contain water equivalent to the penta-, hexa-, hepta -, octa - hydrates and intermediate hydrates.  In Examples 2 and 3, a suitable melt is prepared by adding barium oxide to water.
Patent GB-1453782-A (GB)
Title: Self-restoring current limitting device
IPC: H01H87/00
Filed: 1974-01-25
Abstract: 1453782 Conducting-liquid switches MITSUBISHI DENKI KK 25 Jan 1974 [25 Jan 1973 24 Aug 1973] 03666/74 Heading H1N A current limiting device of self-restoring type comprises a cylindrical metal shell 10 surrounding electrical insulation 14, 20 with a narrow passage 24 through it filled with current limiting material 48 responsive to a flow of excessive current through it to produce heat therein so as   to be evaporated, and a terminal block 16 including pressure release means 38, 42 for decreasing the pressure arising on evaporation of current limiting material 48, terminal block 16 engaging shell 10 through electrical insulation 20. The pressure release means comprises a piston 38 with 0-ring 44 and chamber 40 containing a compressed gas 42. Needle valves 30, 34 are provided. A metal buffer member 12 is provided to absorb stress during moulding. Shell 10 may be of stainless steel, high tension brasses or hard copper alloys. Buffer 12 may be of a soft metal such as copper. Block 16 may be of copper or a chromium-containing copper alloy. Insulation 14 may be of a porcelain material such as alumina or beryllia. Insulation 20 may be a moulded mica produced by mixing a powder of natural or synthetic mica with a powder of low melting point glass and heating under pressure in a mould. Material 48 may be of sodium, potassium or a solid solution of sodium and potassium. Gas 42 is preferably inert. In a second embodiment, Fig. 3 (not shown), collar portion 18 of block 16 is longer for greater strength during moulding, and in a third embodiment, Fig. 4 (not shown), a stop 52 is provided in chamber 40 to prevent piston 38 hitting end portion 50 containing needle valve 30 and reducing the sealing effect of seal 46<SP>1</SP>. Three further embodiments, Figs. 5, 6, 7 (not shown), are as Figs. 2, 3, 4, except that a terminal block 32 is threaded on to the left hand end of shell 10 and contains a second pressure release piston and chamber, the block 32 not being electrically insulated from shell 10. Also the length of passage 24 is greater for higher voltage and contains a restriction 26. Three further embodiments, Figs. 8, 9, 10 (not shown), are as Figs. 2, 3, 4, but have a second terminal block 16 at the left hand end of shell 10 as that at the right hand end and containing the same pressure release piston and chamber and insulated from shell 10 so that shell 10 is completely insulated and can be used for mounting. Also passage 24 is longer for a higher voltage and contains a restriction 26. Reference has been directed by the Comptroller to Specification 1,214,711.
Patent GB-1150394-A (GB)
Title: Shock Absorber Piston
Inventor: PEDDINGHAUS CARL ULLRICH
IPC: F16F9/348
Filed: 1968-01-24
Abstract: 1,150,394. Hydraulic shock absorbers. C. U. PEDDINGHAUS. 24 Jan., 1968 [27 Jan., 1967], No. 3713/68. Heading F2S. Flow through apertures 6 in the piston head 1 of a piston-cylinder shock absorber is controlled by one or more valves 7 each consisting of an initially flat resilient plate or strip engaging a spacer member 12 by which the unstressed flat plate would be maintained spaced from the piston face adjacent the aperture 6. However, a clamping member 8 has a portion 13 which engages the plate between the spacer and the aperture and distorts it into an aperture closing position (as in the case of the lower valve shown) or partly closing position (as in the case of the upper valve shown). The or each valve element may be a strip restrained against rotation in the plane of the piston face or, if a plurality of apertures are arranged around the piston, a disc with a corresponding plurality of radial limbs may be used, each limb constituting the valve element for one aperture.
Patent GB-305810-A (GB)
Title: Improvements in chimney pots
IPC: F23L17/02
Filed: 1928-02-07
Abstract: 305,810. Horsfield, F. A., and Webster, F. P. Feb. 7, 1928. Chimney-tops.-A chimneypot comprises two tubular bodies a, b concentrically disposed one within the other, and the annular passage between them has an open bell-mouthed top g and a recessed or depressed base e. Holes c are provided in the lewer part of the inner body, and drain holes f are formed at the base of the passage. The inner and outer bodies are connected by stays d and the inner member extends several inches above the outer member and is provided with an inwardly turned upper end h. The Provisional Specification describes the inner body as being supported a short distance above the base of the annular passage, no holes being then provided in such body.
Patent GB-1168334-A (GB)
Title: New Pharmacologically Active Pyridazines
Inventor: BELLASIO ELVIO
IPC: A61K31/50
Filed: 1967-01-25
Abstract: 1,168,334. 3 - Amino - 6 - pyridazylhydrazones. GRUPPO LEPETIT S.p.A. 5 Jan., 1968 [25 Jan., 1967], No. 3804/67. Heading C2C. The invention comprises compounds of formula wherein R<SP>1</SP> is H or alkyl (possibly OH-substituted), R<SP>11</SP> is Ph or alkyl (possibly OH-substituted), or NR<SP>1</SP>R<SP>11</SP> is a ring with possibly a further hetero-atom and alkyl substituents, R<SP>111</SP> is H or alkyl, and R<SP>1111</SP> is an alkyl, carboxy, aryl or optionally substituted furyl or thienyl, and a process for preparing them by reacting in an inert solvent the appropriate pyridazylhydrazine and carbonyl compound. All alkyl groups contain 1-8 C atoms. Therapeutic compositions with hypotensive activity comprise compounds of the above general formula with a pharmaceutically acceptable carrier.