baber/WOPTO huggingface dataset:
Patent GB-1437900-A (GB)
Title: Substituted piperazinedione carboxylic acids and metal salts thereof and polymer compositions stabilized thereby
IPC: C08L71/02
Filed: 1974-12-18
Abstract: 1437900 Piperazinediones as stabilizers CIBA-GEIGY AG 18 Dec 1974 [19 Dec 1973] 54751/74 Headings C3P and C3R [Also in Division C2] Polymers such as polypropylene, polystyrene, polyethylene, SBR emulsion, polyacetal resin, polyethylene terephthalate, ABS-terpolymer, polyurethane, polycarbonate, polymethylmethacrylate polyamide and polyphenylene oxide polymer are stabilized by means of a substituted piperazinedione carboxylic acid of the formula  wherein R<SP>1</SP> and R<SP>2</SP> are methyl or ethyl, or together with the intermediate carbon atom form an optionally methyl-substituted cyclopentyl or cyclohexyl ring; n is an integer from 1 to 12; M is hydrogen, dialkyl tin, Ba, Ni, Mn, Co, Ca, Zn, Na, Sn, Li, K, Mg or Al and m is 1-4 and has the same value as the available valence of M.
Patent GB-1307238-A (GB)
Title: Projection apparatus for multiple-sector slide transparencies
IPC: G16H40/63
Filed: 1970-06-09
Abstract: 1307238 Slide projectors SEARLE MEDIDATA Inc 9 June 1970 [10 June 1969] 54983/70 Divided out of 1307237 Headings G2A, G2C A slide projector for use with multiple sector slides 194 has a lens-shutter assembly 120 providing selective projection of single sectors and comprising a separate projection lens 172, 174 for each sector with an associated masking aperture 176, 178, and a shutter 132 having interleaved blades such as 156, 158, 160 each independently movable between two positions by rotary solenoids 144, 146, 148 to expose any one of the masking apertures. The entire assembly is movable relative to projector housing 108 for focusing.
Patent GB-1449510-A (GB)
Title: Lighting devices
IPC: H01K13/00
Filed: 1973-11-27
Abstract: 1449510 Resistance heating element IMPERIAL CHEMICAL INDUSTRIES Ltd 26 Nov 1974 [27 Nov 1973] 55001/73 Heading H5H [Also in Division H1] A lamp for emitting visible and/or infra-red radiation comprises a refractory metal oxide having a negative resistance characteristic such that it can be heated to a temperature at which it conducts an electric current sufficient to maintain it at the temperature required for the emission of the desired radiation, the refractory metal oxide being in the form of fibres. The fibres may be combined together to form a radiating element in various ways, for example they may be formed into a yarn or filament, wool or blanket, paper or felt, or a solid, hollow, porous or cavitated geometric shape such as a sphere, cylinder or block. They may be bound together by an inorganic binder, such as a zirconia, silica or titania sol, which gives the element physical integrity at high temperatures, or by an organic binder, such as a dilute latex solution containing glycerol, which burns off when the element is heated, and may be disposed in a transparent envelope of quartz or glass. The metal oxide is preferably zirconia and may contain additives such as calcium oxide, yttria, or rare earth oxides. The element may be heated to its electrically conductive temperature by means of a flame, or radiation concentrated on the element, or electric resistance heating wires in close contact with, and preferably embedded in, the element. Suitable materials for the wires are iridium, rhodium, platinum, tungsten, molybdenum, nickel, chromium and alloys thereof, the wires being coated if desired with a protective layer of silica.
Patent GB-1322020-A (GB)
Title: Process for the separation of isomer mixtures
IPC: C07C205/12
Filed: 1970-11-19
Abstract: 1322020 Separation of isomers FARBWERKE HOECHST AG 19 Nov 1970 [21 Nov 1969] 55063/70 Heading C2C A process for the separation of an isomer mixture of the nitro-, chloro-, or nitrochlorobenzene or toluene series comprises cooling a melt of the isomer mixture to obtain a crystal mass consisting of one isomer and a substantially eutectic residual melt, separating the crystal mass from the melt by filtration and/or centrifugation, purifying the crystal mass by pressing.
Patent GB-1291830-A (GB)
Title: Improvements in or relating to floral supports
Inventor: TURNER GRAHAM PATRICK
IPC: A01G5/04
Filed: 1968-11-21
Abstract: 1291830 Flower holders; stands G P TURNER 21 Nov 1969 [21 Nov 1968] 55306/68 Headings A4U and A4X A holder for flowers comprises a tube 1 of moisture-impervious, flexible, thermoplastic  sheet material, such as polyvinyl chloride or polyethylene, filled with particulate moistureretaining material such as peat, bent into the required shape, and secured by wire or string 4 to a rigid circular foundation frame 5. The ends of the tube are sealed by heat or by stapling and the wired stems 6 of flowers or foliage are inserted through the wall of the tube. The wires preferably extending out through the opposite side of the tube and being bent over at 8 to retain the stems. In modifications, the sheet material is shaped to the form of a cushion or a straight tube, in the formation of a flower spray arrangement, is wired to the longer limb of a cruciform frame, the ends of the lateral limbs of the frame being bent downwardly to provide support legs. The sheet material is translucent or transparent and may be dyed or coloured green.
Patent GB-1415534-A (GB)
Title: Safety devices in electrical appliances
IPC: H02H9/06
Filed: 1972-11-30
Abstract: 1415534 Protective apparatus B G WAURICK & ASSOCIATES PTY Ltd 30 Nov 1972 [9 Dec 1971] 55459/72 Heading H2H Apparatus for preventing damage to electrical circuit elements by high voltage surges which occur when circuit breakers are opened after a fault occurs comprises the parallel combination of a negative coefficient voltage dependent resistor and a surge arrestor. A three phase star connected alternator 7 having an earthed neutral is connected to a power supply system by way of a circuit breaker 6. Each of the phase lines is connected to the earthed neutral by means of a parallel connected combination of a negative coefficient voltage dependent resistor 2 and a surge arrestor device 3. If a phase to earth fault occurs in the system beyond the circuit breaker 6, the circuit breaker will open and a high voltage will be developed at the alternator terminals due to the inductances in the circuit elements. This high voltage will cause the arrestor devices 3 to respond and dissipate the excess voltages should the voltage dependent resistors 2 be insufficient to dissipate such voltages. The parallel combination of the devices 2, 3 may also be connected between phases to protect the system from phase-tophase faults. The elements 2, 3 may be encapsulated in a body of epoxy resin and provided with terminals 4, 5. A second embodiment is described for use with a system without an earthed neutral.
Patent GB-1335674-A (GB)
Title: Heating elements assemblies comprising several of these elements furnaces constructed by means of said elements or assemblies and preheating method for said furnaces
IPC: H05B3/64
Filed: 1970-11-24
Abstract: 1335674 Resistance heating elements; electric furnaces AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE 24 Nov 1970 [24 Nov 1969] 55775/70 Heading H5H A resistance heating element 1, of oxidationresistant, refractory material such as stabilized zirconia, comprises two elongated arms 1a, 1b, joined by a common part 1c, the arms being flat or curved longitudinally, Figs. 4-6, (not shown), the free ends 2a, 2b of the U-shaped element being shaped to enable it to be suspended and serving for the supply of current to the element, and the thickness e of the arms as well as their distance apart d decreasing from the free ends 2a, 2b, in the direction of the common part 1c. The thickness of part 1c is greater than the least value of thickness e. The free ends have supporting collars 3a, 3b, or are bent, Fig. 13, or Figs. 7, 8 (not shown), for easier suspension in superposed rows of heating elements 1 in a furnace, using supports 7. The supporting arrangement for the elements 1 comprises distinct supports 7 of a material compatible with the temperature of operation, or separated from the elements by platinum shims, or of the same material of the elements 1 for temperatures of 2000 C. upwards. For lower temperatures, 1800-1900 C., there is used a continuous support of alumina with platinum plates separating it from the elements 1. Heatinsulating elements 6 are supported on the free ends of the elements 1, and extend over two or more elements. Elements 6 may be of the same material as the elements 1 or of alumina. Shims 17, 18 space the supports 7 and insulating elements 6, respectively. Heat insulating bricks 9a, 9b, and a cover 9c, enclose the heating assembly, all being of alumina. Current supply wires 12 connect to platinum contacts 11 or 21 on the free ends 2a, 2b, of the elements 1. Supports 13 move by rollers 14 on a track 15 to introduce objects for heat treatment into the tunnel furnace arrangement or to introduce a pre-heating element 16 to bring the elements 1 up to the temperature at which they become conductive. The furnace may be circular or tunnel shaped. The tunnels may be traversed by gases to heat the gases to high temperatures.
Patent GB-1492185-A (GB)
Title: Process for preparing methacrylic acid
IPC: C07C57/055
Filed: 1974-12-24
Abstract: 1492185 Methacrylic acid NIPPON SHOKU. BAI KAGAKU KOGYO CO Ltd 24 Dec 1974 [29 Dec 1973 19 Jan 1974] 55838/74 Heading C2C [Also in Division B1] Methacrylic acid is produced by the vapour phase oxidation of methacrolein with a molecular oxygen-containing gas in the presence of an oxide catalyst composition of general formula Z a X b P c Mo d V e O f  where: Z is at least one of Cu, Co, Zr, Bi, Sb and As; X is at least one of Na, K, Rb and Cs ; d is 12; a and b are 0-10 but a + b is greater than zero; c and e are 0À1-10; and f is a number to satisfy valency requirements. The oxidation may be effected at 200-400 C., 1-10 atmosphere pressure and a space velocity of 500-3000 hr<SP>-1</SP>. The feed may contain 1-10 vol. per cent methacrolein, 1-15 vol. per cent oxygen, 5-60 vol. per cent steam and the balance nitrogen, carbon dioxide or carbon monoxide. A fixed or fluidized bed reactor may be used.
Patent GB-1411085-A (GB)
Title: Hammer mills
IPC: B02C13/286
Filed: 1971-12-01
Abstract: 1411085 Impact pulverisers E H BENTALL & CO LTD 30 Nov 1972 [1 Dec 1971] 55859/ 71 Heading B2A A hammer or beater mill comprises a housing 1, a milling chamber 7 a drive shaft 3' at the full annular speed by the hammers. The mill includes a screen 8 and material is drawn supporting a rotor 4 bearing hammers 5, an inlet passage 10 and an outlet 14, the inlet passage supplying material along the hammers at an angle less than 30‹ to the radial direction. Since the material moves with substantially no angular velocity component it is impacted through the mill and discharged via the outlet 14 by fan blades 9 secured to the drive shaft. The beater members may be fixed beaters or pivoted swing hammers.
Patent GB-1395889-A (GB)
Title: Ac power control unit
IPC: H02P27/02
Filed: 1971-12-03
Abstract: 1395889 Automatic control systems HOWDEN SUPERTHERM Ltd 7 June 1972 [3 Dec 1971] 56130/71 Heading G3R A control system includes a semi-conductor switch 5 whose on/off period is altered to control the power supplied to a load C wherein a control signal which is the sum of a reference signal and the error signal produced from the comparison of an actual value with the reference value is used to produce from a staircase waveform a square wave, whose mark to space ratio corresponds to the value of the control signal, which square wave controls the application of firing pulses to the semi-conductor switch. The staircase generator 3 produces a waveform having a selectable number of steps (from 2 to 15) and is synchronized with the mains supply by oscillator 1 and shaper 2. The control input (control signal) is used in generator 4 to produce the variable mark/space ratio square wave which is used to enable the firing pulse generator 6 for the period of the cycle of the staircase waveform when power is to be supplied to the load. In the embodiment shown the load C is a heater and sensor 8 produces a signal representative of the actual temperature which signal is fed, along with the reference signal, to a difference amplifier 7. The control system can also be used for the control of a three phase heating system or single, or three phase motors. In a motor application it is stated that the speed of the motor may be sensed or, if it drives a fan the air-flow from the fan may be sensed.
Patent GB-1365496-A (GB)
Title: Prparation of chlorine by electrolysisi of hydrochloric acid and  polyvalent metal chlorides
IPC: C25B1/26
Filed: 1971-12-06
Abstract: 1365496 Chlorine production DOW CHEMICAL CO 6 Dec 1971 56554/71 Heading C7B A continuous process for producing chlorine comprises passing separate anolyte and catholyte streams through anode and cathode compartments A and C of an electrolytic diaphragm cell 10, the anolyte and catholyte containing aqueous HCl and a polyvalent metal chloride. Chlorine is evolved at the anode 12 and the valency of the polyvalent metal chloride is reduced at the cathode 11. The current density is up to one amp/sq in. The polyvalent metal chloride may be copper chloride, iron chloride or chromium chloride. The diaphragm 13 may be polypropylene, copolymers of vinyl chloride and acrylonitrile, or polyvinyl chloride. The composition of the anolyte and catholyte may be 2M Cucl 2  and from 3-8M HCL. The chlorine is removed at degassing unit 15. The anolyte then passes through heat exchanger 22 and absorber 16 where HCl is replenished. The anolyte is returned to the cell via filter 23. The catholyte is passed through heat exchanger 22 to an oxidizer 19 where it is contacted with an oxidizing atmosphere to reoxidize the polyvalent metal chloride. The oxidizing atmosphere may comprise an oxygen or chlorine containing gas. The reoxidized catholyte is then returned to the cell via filter 23.
Patent GB-1368679-A (GB)
Title: Back pack frames or carriers
IPC: A47D13/02
Filed: 1972-12-08
Abstract: 1368679 Load carriers GERICO Inc 8 Dec 1972 [16 Dec 1971] 56756/72 Heading A3V A carrier for supporting a load on a person's back, e.g. a child, comprises a tubular metal frame 14 and a pouch 16 for the child, the frame having an upper portion 19 for extending across the shoulders of the wearer and connected by curved portions 20 to sloping side members 22 which extend forwardly and downwardly along opposite sides of the back towards the waist of the wearer and terminate in straight end pieces 24, 26, these pieces being connected by a resilient arcuate brace 30 the length of which in its relaxed state is greater than the spacing of the end pieces 24, 26 so that when in position the brace 30 exerts a spreading force on the frame side members 22, the force being resisted by the frame to hold the brace 30 in compression and so rigidify the entire assembly. The brace 30 is preferably of polyethylene and is of U-section with a central reinforcing rib 40. A socket 41 is provided at each end of the brace 30 to receive the portions 24, 26 of the frame, these portions being located by pins 54 in the sockets engaging in holes 56 in the frame. A flexible fabric strap 68 is tensioned between the ends of the brace 30, being secured thereto by lugs 42 on the sockets 41 which pass through eyelets on the strap, and this strap serves to further tension the brace 30 and to contact the wearer's back and thereby take the load of the frame, without there being contact between the wearer's back and the rigid brace 30. The sockets 41 may enclose the ends of the frame portions 24, 26 as shown, but an embodiment is also described wherein these portions are elongated and pass through the sockets, the portions 24, 26, having spaced holes, as 56, for engagement with the pins 54 whereby the brace 30 may be adjusted in position along the end portions of the frame to suit different wearers,
Patent GB-1495931-A (GB)
Title: Refining of metals
IPC: C22B11/00
Filed: 1973-12-07
Abstract: 1495931 Separating Pt, Ir and Rh MATTHEY RUSTENBURG REFINERS (PTY) Ltd 6 Dec 1974 [7 Dec 1973] 56826/73 Heading C1A Platinum, Rhodium and Iridium are separated and purified from an aqueous solution of their salts by the steps of: (a) adjusting the pH, if necessary, to give an acidic solution; (b) contacting this with a reducing agent to reduce Ir (IV) to Ir (III); (c) contacting the reduced solution with a secondary or tertiary amine or a quaternary ammonium compound; (d) separating the organic phase containing the platinum; (e) re-oxidizing the iridium to Ir (IV) in the aqueous phase; (f) contacting the oxidized solution with a fresh quantity of a secondary or tertiary amine or a quaternary ammonium compound; and (g) separating the organic phase containing the iridium.
Patent GB-1279692-A (GB)
Title: Improvements in or relating to laminates
Inventor: FLATMAN RICHARD JAMES
IPC: B32B3/12
Filed: 1969-11-22
Abstract: 1279692 Laminates ROLLS-ROYCE Ltd 22 Nov 1969 57276/69 Heading B5N [Also in Divisions E1 F1 and F2] A laminate comprises a porous layer 2 e.g. of compressed wire wool or of a material made porous by drilling holes there through, an impervious layer 3 and a cellular structure 4 having walls 5 defining a plurality of cells 6, the cellular structure being attached to and located between the said two layers and having apertures 7 formed in opposed walls of each cell, the apertures being arranged in parallel lines. The cellular structure may consist of a plurality of corrugated strips welded together at their lines of contact. A drainage duct may be provided in communication with the apertures so that a fluid in anyone of the cells can drain into the drainage duct through the apertures. In a preferred embodiment, the laminate may be formed into or form part of a tapering duct, the apertures lying in a substantially circumferential plane with the drainage duct located at the lowest part of the tapering duct. The drainage duct may be provided by deforming the walls of axially adjacent cells and the impervious outer layer may be stressed to form the outer surface of the duct. The tapering duct may form the exhaust collector of a gas turbine engine; alternatively the laminate may be in the form of an acoustic lining.
Patent GB-1256234-A (GB)
Title: Improvements in and relating to cameras
Inventor: ANDO SADANAO
IPC: G03B17/52
Filed: 1968-12-04
Abstract: 1,256,234. Cameras. No.57514/68. Dec. 4, 1968 [Dec.13, 1967(5)], No.57514/68. Headings G2A and G2H. A camera comprises a detachable processing chamber containing a spiral film guid. As shown, a lens 1, shutter 2, V-shaped mirror 4 and plane mirror 6 provided an erect image on a film 7 contained in a magazine 8. After exposure, rollers 9, 10, 21, 22 advance the film into a chamber 19 containing a guide 30, the rollers 21, 22 retaining developing liquid therein. Roller 9 rotates a disc (32), Fig. 5 (not shown), supporting a pin (31) which eventually trips a lever (33) to move a cutter 17 which co-operates with a stationary cutter 16 to sever the film. Rollers 21, 22 are then operated to wind the rest of the exposed portion of film into the chamber 19, which is removed from the camera body and shaken, the developed film being delivered by reverse rotation of rollers 21, 22. Fresh developer may be introduced by removing a plug 35. The film is preferably such that, upon exposure, an electrostatic latent image is produced without prior charging. Zinc oxide on a conductive base is specified. The developing liquid comprises toner particles in an insulating carrier liquid.
Patent GB-1382731-A (GB)
Title: Fuel feed units
IPC: F04D29/04
Filed: 1972-12-15
Abstract: 1382731 Dynamo-electric machines ROBERT BOSCH GmbH 15 Dec 1972 [17 Dec 1971] 57907/72 Heading H2A A fuel feed unit comprises an electric motor 2 and a pump 1 whose rotors are rotatably mounted on a rod 8 and are interconnected by a splined plug-in coupling 16, at least one pole 18 of the motor stator being offset from the motor rotor towards the pump rotor so that, in use, the motor rotor is magnetically pulled towards the pump rotor. As shown, the pump rotor 10 is mounted on a bearing 14 which, through the splined coupling 16, also supports one end of the motor rotor. The pump is a side channel pump including a channel side plate 6 fixed to the stationary rod 8. The motor and pump are enclosed in interfitting housing parts 3, 4.
Patent GB-1283100-A (GB)
Title: Cyclopentene derivatives
IPC: C07D235/02
Filed: 1969-11-06
Abstract: 1283100 Cyclopentene derivatives AMERICAN HOME PRODUCTS CORP 6 Nov 1969 [20 Nov 1968] 57928/71 Divided out of 1283099 Heading C2C Compounds of the formulµ wherein R 8  is a carboxy, carboxamido, acyl halide, simple or mixed anhydride or ester group, and R 9  is an amino lower (C 1-7 ) alkyl amino or phenyl (lower) alkylamino group, which may be substituted by an amino protecting group, or an amido group with the proviso that when R 8  is amido R 9  is also amido, or when R 8  and R 9  are taken together with the carbon atom to which they are attached they form a 1,3 - diazolidin - 5 - yl - 2,4 - dione, 3 - oxa - 1- azolidin - 5 - yl - 2,4 - dione, 1 - lower alkyl - 3- oxa -1- azolidin - 5 - yl - 2,4 - dione, or 3 - oxa - 1- phenyl (lower) alkyl - 1 - azolidin - 5 - yl - 2,4- dione ring, may be prepared by amidation of a cyclopentene- 1,1 -dicarboxylate to obtain a cyclopentene - 1,1 - dicarboxamide, cyclizing the latter by contact with an aqueous solution of an alkali metal hypohalite to yield a 1,3- diazaspiro[4,4]nonene-2,4-dione, cleaving the latter, e.g. by treatment with barium hydroxide, to produce a 1-aminocyclopentene-1-carboxylic acid, optionally alkylating the latter by standard methods (e.g. by reaction with p-toluenesulphonyl halide, treatment with alkyl halide, followed by acid hydrolysis) to the corresponding 1 - (N - alkylamino) cyclopentene - 1 - carboxylic acid, and then cyclizing either of the two latter carboxylic acids with phosgene to give corresponding 3 - oxa - 1 - azaspiro[4,4]nonene- 2,4-diones. The ester, anhydride and acyl halide derivatives of the above 1-aminocyclopentene-1- carboxylic acids may be prepared by conventional methods.
Patent GB-1198580-A (GB)
Title: Automatically Cleaned Air/Gas Filter.
IPC: B01D46/18
Filed: 1968-12-06
Abstract: 1,198,580. Travelling-band gas filters. COMPAGNIE GENERALE d'ELECTRICITE. 6 Dec.. 1968 [8 Dec., 1967], No. 58212/68. Heading B1T. The bands 2 are endless, of corrugated plastics material, and are partly immersed in a cleaning and impregnating fluid 1, e.g. oil. As described some bands may be disposed inside others (Fig. 1) or they may be independently supported iby individal rollers (Fig. 2, not shown). In Fig. 1 the rollers 4 are suspended by the bands 2 only.