baber/WOPTO huggingface dataset:
Patent GB-1093784-A (GB)
Title: Disproportionation of olefins
Inventor: HOWMAN ERIC JAMES
IPC: C07C6/04
Filed: 1965-08-25
Abstract: Acyclic olefines, for example C3 to C30 alkenes are disproportionated using a catalyst comprising rhenium heptoxide and a support comprising a Group IV refractory oxide.  Reaction conditions may be: temperature-20 DEG  to +500 DEG  C., pressure 0-2000 p.s.i.g., olefin/catalyst weight ratio 1000:1 to 1:1, GHSV of olefin feedstock 500-5000 v/v.  An inert diluent may be present. The product may be fractionated and selected fractions recycled to the reactor. Examples relate to disproportionation of propylene over Re2O7/zirconia, Re2O7/thoria, Re2O7/stannia, Re2O7/titania, Re2O7/silica. Other feeds mentioned are butene-1, butene-2, pentene-1, pentene-2, hexene-1, hexene-2, hexene-3, heptene-1, heptene-2, heptene-3, octene-1, octene-2.  The process may be as described in Specification 1,064,829.ALSO:An olefin disproportionation catalyst comprises rhenium heptoxide and a support comprising a Group IV refractory oxide or a mixed or compound oxide containing such an oxide.  Refractory oxides exemplified are (1) zirconia (2) thoria (3) stannic oxide (4) titania (5) silica.  The catalysts preferably contain 0.1-40 parts by weight rhenium heptoxide per 100 parts by weight support, and are acticated by treatment in air at 300 DEG -900 DEG C for 1 minute to 20 hours and then treatment under similar conditions in an inert gas, or alternatively by treatment only in an inert gas.
Patent GB-177277-A (GB)
Title: Improvements in or relating to sparking plugs
IPC: H01T13/32
Filed: 1920-12-31
Abstract: 177,277. Fisher, S. Dec. 31, 1920. Sparking-plugs.-In a plug of the kind in which, by removing or partially rotating a cap B, the central portion of the plug may be lifted out of the casing, and in which the pressure of the cap B is taken by a metal ring C, the earthed electrode extends from within the ring C, traverses an inclined groove in the insulator E and towards its end bends more sharply towards the spherically-ended central electrode. Specification 147,251 is referred to.
Patent GB-869319-A (GB)
Title: Electrical connector assemblies
IPC: H01R12/70
Filed: 1959-10-28
Abstract: 869,319. Two-part couplings. UNITED-CARR FASTENER CORPORATION. Oct. 28, 1959 [Oct. 28, 1958], No. 36622/59. Class 38 (1). A polarizing key 10 for use in a printed circuit board edge connector 14 comprises a strip of flat sheet metal having bent ends 18, 20, an arm 22 and a tang 24. The connector consists of a number of apertures 26 each containing a contact 12 having flexible legs 34, 36 and, as shown in Figs. 3, 4, a printed circuit board 44 has keyways 46 which conform to the positioning of two polarizing keys 10 inserted in the connector. As a key is inserted in an aperture with its end 20 lowermost, the arm 22 is led into engagement with the radiused portion 32 of one of the flexible legs of the contact 12 which is flexed as shown in Fig. 7. Further downward movement of the key causes the end 38 of the arm 22 to pass the outermost radius of the flexible contact leg which then snaps back to its original position and prevents withdrawal of the key. The upper end 18 of the key overlies the open end of the connector aperture and prevents the entrance of a printed circuit board not having a corresponding keyway.
Patent GB-412590-A (GB)
Title: Improvements in automatic and semi-automatic telephone systems
IPC: H04Q3/00
Filed: 1932-12-29
Abstract: 412,590. Automatic exchange systems. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. Dec. 29, 1932, No. 36810. Convention date, Dec. 29, 1931. [Class 40 (iv).] In a system employing a link comprising a call-finder and a forwardly-hunting switch with separate test relays, the holding potential from the switch ahead short-circuits the test relay of the forwardly hunting switch and holds the other over a low resistance winding. The invention is described with reference to a link comprising no-normal power-driven switches AS, SNS. The operation of the start relays LR, STR following on the partial energization of the line and cut-off relay LBR energizes SNM in a number of links to start their forwardly-hunting switches. When a switch SNS finds an idle trunk its test relay SR energizes AM to start the finder AS which hunts under control of AR. When the line is found, AR pulls up in series with LBR (which operates fully) and energizes HR which switches through. Release relay R2 in the group selector then makes a circuit over the test wire for holding AR and short-circuiting SR.
Patent GB-415802-A (GB)
Title: Improvements in or relating to mercury-arc rectifiers
IPC: H01J13/48
Filed: 1932-12-30
Abstract: 415,802. Converting. WESTINGHOUSE ELECTRIC & MANUFACTURING CO., East Pittsburg, U.S.A.-(Assignees of Atherton, A. L. ; Saltsburg Road, Verona, Pennsylvania, U.S.A.) Dec. 30, 1932, No. 36883. Convention date, Jan. 28. [Class 38 (ii).] In a rectifier installation comprising a plurality of rectifiers, a supply transformer and switching means to enable operation of the rectifiers as a unit, the rectifiers are arranged in pairs, each pair being mounted in a frame with plug connectors for completing the circuit connections. A construction of unit is shown in Fig. 7. The rectifiers 63, 64 are mounted on rollers 66 in a frame 60 and the anode and cathode connections are completed through jacks 75, 82 so that each rectifier can be isolated by moving it to the outer position in which the lower rectifier is shown. The transformer secondary leads are connected to terminals 69 which are connected to balancing coils 20. Condensers 70 are connected to operate as surge protectors. Each rectifier is provided with a mercury evacuating pump 94, oil sealed rotary pump and cooling water pump 124. The water connections are through flexible hoses 105 and 129. In a modification the water is discharged into a trough 130. Additional plug connections 87 are provided for the auxiliary leads for controlling and indicating the operation of the rectifiers. Circuit connections are shown in Fig. 1. Four rectifiers 22 are supplied from the transformer secondaries 11-14, the star points being interconnected through interphase reactors 15, 16. Each phase winding supplies the anodes 21 through balancing coils 20 which ensure parallel operation. Circuit breakers are provided in the D.C. leads and additional breakers 34 in the cathode leads for protection against back ignition. In a modification the interphase reactors 15, 16 are replaced by a single reactor. In a further modification the windings 13, 14 are omitted and each phase winding supplies four anodes, three balancing coils being used for each four anodes. In another modification the windings 11-14 are zig-zag connected and the centre points of the interphase reactors are connected through a further reactor.
Patent GB-369250-A (GB)
Abstract: 369,250. Gas valves and cocks. FALK, H., FALK, STADELMANN, & CO., Ltd., 91, Farringdon Road, London, and WOOTTON, H. A., 84, Edward Street Parade, Birmingham. Dec. 13, 1930, No. 37669. [Class 135.] Lift valves.-A lift valve 6 controlling gas supply to a pilot jet 5 is operated by a plunger 28 which also operates by a rack 19 a pyrophoric device for igniting the pilot jet. The plunger 28 is depressed by a trigger 29 pivoted to a handle 30 on the body member 11 and is returned by a spring. A continuation of the downward movement of the plunger 28 causes the rack 19 to engage with a cam 33 and to turn on its pivot connection with the plunger until the valve stem 31 engages with a recess 34, whereupon the valve is closed by a spring 32. The rack 19 is held in the inclined position on the trigger being released by a pin 37 engaging a recessed spring 36. At the end of its upward movement the spring 36 engages a projection 38 on the flint holder 15 and allows the rack to be returned to its initial position by a spring 39.
Patent GB-1033638-A (GB)
Title: Polytetrafluoroethylene moulding powders and their preparation
IPC: C08K3/00
Filed: 1964-09-09
Abstract: Polytetrafluoroethylene moulding powders having a total surface area of 1 to 3 square metres per gram as measured by nitrogen absorption, a crushing factor of 1 to 7, an apparent density of 400 to 700 grams per litre, or when filled 400 to 1100 grams per litre, and a powder flow index of at least 4 grams per second, may be prepared by deagglomerating polytetrafluoroethylene powder having a total surface area of 1.1 to 2.8 square metres per gram at 0 DEG  to 50 DEG  C. until a powder having an average particle size of less than 200 microns is obtained, and tumbling the powder in a cylinder rotating at a speed sufficient to produce a resultant centripetal force of 0.005 to 0.5 times the force of gravity for 10 to 30 minutes at 60 DEG  to 90 DEG  C.  Deagglomeration may be effected by subjecting the powder to a hammer mill or to shearing forces by the action of rotating cutting blades.  Fillers, e.g. glass fibres, mica, bronze and carbon, may be added, and the powders moulded to form sheets or other shaped articles.  In a modification of the process the deagglomerated powder, preferably together with an agent imparting hydrophobic properties to the particles, in a liquid, e.g. aqueous, medium at a temperature of 40 DEG  to 90 DEG  C. for 30 to 120 minutes.
Patent GB-1305449-A (GB)
IPC: C08J7/052
Filed: 1970-07-31
Abstract: 1305449 Coating CANADIAN INDUSTRIES Ltd 31 July 1970 [11 Aug 1969] 37120/ 70 Heading B2E  The surface properties of polymeric material are improved by applying to the surface a soluution of a polar polymer and a peroxide cross linking agent and evaporating the solvent from the solution, said solvent having a solvating action on the substrate which swells the surface, the temperature being maintained below the softening point of the polymeric material during the application and evaporation steps. The polymeric material may be polyethylene, polypropylene, polybutylene, polyisobutylene, polyhexene, or copolymers of butylene and isobutylene, butylene and styrene, ethylene and butylene, ethylene and propylene, styrene and ethylene or butylene and propylene. The polar polymer is defined as a copolymer of ethylene with an unsaturated faty acid, e.g. acrylic acid or methacrylic acid and/or an unsaturated ester of a fatty acid, e.g. vinyl acetate, methyl acrylate or ethyl acrylate. The solvent may be benzene, toluene, xylene, tetralin, hexane, octane, decane, trichloroethylene, carbon tetrachloride, chlorobenzene, tetrahydrofuran or nitromethane. The solution may also contain anti-static agents, ultra violet absorbents, cross-linking accelerators, elastomers and polyolefins. The coatings may be applied by spraying, dipping, or by rollers. The solvent may be evaporated by infra-red heaters or hot air. The heat sealability and the adhesion of inks is improved by the process. In the Examples polyethylene film is treated and coated with flexographic inks.
Patent GB-921447-A (GB)
Title: Improvements in or relating to nuclear reactors
Inventor: BAUER STEFAN GEORGE
IPC: G21C7/22
Filed: 1959-11-02
Abstract: 921,447. Liquid level indicators. ROLLSROYCE Ltd. Oct. 6, 1960 [Nov. 2, 1959], No. 37178/59. Class 123 (1). [Also in Group XL (a)] In a device for indicating the levels 13 of a moderator liquid in tubes 12 in a nuclear reactor tank 10 housing fuel elements 11 the lower end of each tube 12 communicates through a conduit 15 with one chamber 16a of a remotely arranged pressure-responsive device 16 the other chamber 16b of which, separated from the chamber 16a by a diaphragm 17, communicates through a conduit 19 with a mercury containing column 18. The upper end of each tube 12, filled with a gas e.g. helium at a selected pressure, is connected by a conduit 24 to a pressure transmitter 25 communicating by means of a conduit 26 with the upper end of the column 18 which is filled with a gas such as carbon dioxide. The mercury level in each column 18 can be sensed e.g. by an inductance or capacitance type of pick-up 20 connected in a bridge circuit 21 feeding a meter 22. The lengths L, I of the conduits 15, 19 are given a ratio equal to the reciprocal of the densities of the liquids in them in order to compensate for accelerations when the reactor is mounted e.g. in a marine vessel.
Patent GB-1364692-A (GB)
Title: Thrust spoilers of ducted fan gas turbine engines
IPC: F02K1/68
Filed: 1971-08-07
Abstract: 1364692 Aircraft ducted fan gas turbine engines ROLLS-ROYCE (1971) Ltd 7 Aug 1971 37211/71 Heading B7G A ducted fan gas turbine engine on an aerodynamic shaped pylon 28 has an engine casing 12 formed partly with at least one panel 34 pivotable to deflect air from the ducted fan 20 of the engine, e.g. air expelled from the fan duct 18, the pivoting of the or each panel 34 being outwardly of the casing about a pivot 45 joining the upstream edge of the or each panel with said pylon 28. In the embodiment shown the engine is mounted on a pylon forming the aerofoil 28 which depends from an aircraft wing 30, two panels being provided one on each side of the casing and an elongate strut 32 being fixed to and lying between the fan duct cowl and the engine casing. Also further pivots 46 are provided to join the strut with the respective panels. Flanges (56, 58), Fig. 3 (not shown), may extend from the edges of the panels normally thereof to provide a degree of reverse thrust. In a further embodiment, Fig. 4, (not shown), the engine is wing mounted without a pylon, the pivots joining the panels to the wing. The profile of the panels is preferably the same as that of the outlet nozzle of the cold fan.
Patent GB-1200801-A (GB)
Title: Method and means for terminating flexible etchings
IPC: H01R12/59
Filed: 1967-08-14
Abstract: 1,200,801. Two-part couplings. THOMAS & BETTS CO. 14 Aug., 1967, No. 37218/67. Heading H2E. A connector for terminating a tape cable 12 having etched conductors 16 embedded in preferably a plastics material comprises a hollow housing 10 having therein a metal spring 32 of the profile shown, the lower arm 44 of the spring fitting tightly under a support element 28 to hold the spring firmly. The cable 12 has its end 35 gripped in the bent end portion 40 of the spring, by means of struck out tabs 34, and is drawn round the spring end 48, some plastics material having been removed to expose the conductors. The cable enters the housing through a sinuous slot which provides strain relief. The housing portions 22, 24 are hinged, and open as shown in dotted outline, and are held together by latching means 52. Contact pins 14 on a circuit element are inserted through the opening 18 and make contact with the exposed cable conductors 16. Guide rails (38, Fig. 3, not shown) are provided to ensure correct alignment of pins 14. The pins have detent notches (5, Fig. 1, not shown) which snap behind locking elements 30 in the opening 18. In a modification (Figs. 7, 8, not shown) two separate cables (12, 12<SP>1</SP>) are gripped by the spring, with their exposed conductors (16, 16<SP>1</SP>) in face-to-face abutment, the housing comprising a separate strain relief means for each cable. In all embodiments, the conductors 16 do not extend to the end 35 of the cable, so that the tabs 34 do not make an electrical connection between the spring 32 and the cable. The spring may be formed in long lengths, (Fig. 4, not shown) and cut to desired lengths.
Patent GB-1395932-A (GB)
Title: Focussing of ultrasonic waves
IPC: A61B8/00
Filed: 1972-08-09
Abstract: 1395932 Ultrasonic probes; ultrasonic reflectors and lenses F HOFFMANN-LA ROCHE & CO AG 9 Aug 1972 [7 Oct 1971 12 Oct 1971] 37232/72 Headings H4J and H4X An ultrasonic field for use in materials testing and in medical diagnosis has an annular cross-section and is converged along a focal line extending in the direction of propagation. Ultrasonic wave energy from a piezoelectric transducer 1 is first conveyed by a lens 5 of acrylic material. Silicone grease 6 acts as an ultrasonic coupling medium. An annular plate 9, e.g. of brass, acts as a mirror and its mirror surface is concave and has a non-spherical mirror surface which is a surface of revolution about the axis of the annulus. A spherical ultrasonic mirror 11, e.g. of brass, is spaced from plate 9 by struts 15. An ultrasonic pulse emitted by transducer 1 is, after being conveyed by lens 5, diverged by mirror 11 and focused by mirror 9. The non-spherical shape of mirror 9 results in convergence to a focal line. In alternative arrangements, the mirror 9 is spherical and the mirror 11 is non-spherical, or mirrors 9 and 11 are both non-spherical. In yet another arrangement (not shown), a non-spherical mirror is replaced by an acoustic lens having a non-spherical surface. An alternative embodiment (Fig. 2) uses an ultrasonic transducer 17 and a diverging lens 18 on the axis of a hollow cylinder 16. Ultrasonic rays 19 reflected from the inner wall of cylinder 16 converge on a focal line on the axis. Yet another embodiment (Fig. 3) uses an annular housing 21 of U-shaped cross-section. An annular damping block 24 of epoxy resin/ tungsten is insulated from housing 21 by cork panels 22. Four flat segments 23 of piezoelectric material together form a ring and are covered by epoxy resin 25. A lead 26 runs to each segment 23. Ultrasonic waves converge on a focal line on the axis. The length of the focal line is determined, inter alia, by the width of segments 23 and their inclination to the axis. The same transducer may be used for transmitting and receiving.
Patent GB-1453564-A (GB)
Title: Gain control circuit
IPC: H04H20/89
Filed: 1974-08-27
Abstract: 1453564 Gain control; quadraphonic decoders SANSUI ELECTRIC CO Ltd 27 Aug 1974 [27 Aug 1973] 37301/74 Heading H4R In a gain control circuit, Fig. 1, the source drain path of first fet 62 is connected to control the gain of an amplifier 60 in accordance with the variation of a control voltage relative a reference voltage. A second fet 64 which is formed in the same semi-conductor chip 63 as the first fet 62 is connected as a source follower, with its gate connected to the reference voltage and its source connected to the source of fet 62. The arrangement ensures that variations of the reference voltage and variation in the sourcegate threshold voltage have no effect on the gain control characteristic. The system is applied to a quadraphonic matrix decoder, Fig. 1, in which L and R signals are combined as set out below to produce the quadraphonic signals where and the factor f, b, l and r are gain coefficients derived by phase comparison of the L and R signals in phase discriminators 30 and 40 to produce pairs of voltages Eb, Ef, and Er, El, which vary in opposite fashion within the two pairs, i.e. as Eb varies in such a way that b varies from 0 to 3À414 Ef varies so that f varies from 3À414 to 0, the diodes circuits 31, 32 being provided to introduce a non-linearity such that the cross over point, with no signal input, corresponds to a reference gain where b =f = 1. The gain control voltages are applied to the gates of respective mosfets 22, 23, 24, 25 which are connected so that their source drain paths provide degenerative feedback in the emitter circuits of respective amplifying transistors 13, 15, 16, 17. All the mosfets are on the same semiconductor chip together with a mosfet 28 which is connected as a source follower with its source commoned to the sources of transistors 22, 23, 24, 25 and the gate of transistor 28 connected to the reference potential which is the average of Eb, Ef, Er, and El.
Patent GB-1180325-A (GB)
Title: Method and Plant for obtaining Thermoplastic Coal Product
Inventor: SHUSTIKOV VALENTIN IVANOVICH
IPC: C10B57/08
Filed: 1968-08-06
Abstract: 1,180,325. Treating coal. UKRAINSKY NAUCHNO - ISSLEDOVATELSKY UGLEKHIMICHESKY INSTITUT. 6 Aug., 1968, No. 37456/68. Heading C5E. [Also in Division F4] A thermoplastic coal product is made by heating coal to a temperature 10‹ to 20‹ C. lower than that of the maximum rate of destruction, e.g. not more than 400‹ C., and holding the coal at that temperature for from 5 to 20 minutes, and then abruptly cooling the coal product, e.g. in a water bath, to below 30‹ C. The process is applicable to coals containing more than 5À5% b.w. hydrogen, and two plants are described. Coal containing 5À5% to 7À3% b.w. hydrogen is ground to a granule size of 0À5 to 6 mm. and treated in a horizontal, electrically heated rotary autoclave, e.g. in the presence of natural gas or coke oven gas. Coal containing more than 7À3% b.w. H 2  is treated in the plant illustrated, which comprises a chamber 2 in which the granulated coal is heated by hot gases, at a rate of 70‹ to 100‹ C. per second, a cyclone separator 3, reactor 4 where the heated coal is held for the required time, water tank 7, and a fractional condensation cooler 6 where volatiles boiling below 200‹ C. are led off. Volatiles boiling above 200‹ C. may be recycled to the reactor. If the coal has more than 9À0% b.w. H 2  the chamber 2 may be replaced by an electric heater, in which case the heating rate is 5‹ to 10‹ C. per minute.
Patent GB-1098863-A (GB)
Title: Improvements in or relating to a self-rescue respirator assembly
Inventor: MCCRAITH JAMES HARKNESS
IPC: A62B7/02
Filed: 1963-09-24
Abstract: 1,098,863. Respirators. COAL INDUSTRY (PATENTS) Ltd. Sept. 24, 1964 [Sept. 24, 1963], No. 37549/63. Heading A5T. [Also in Division B8]  A self-rescue respirator assembly, e.g. for use in a mine, comprises a self-rescue respirator 1 provided inside a container which can be filled with gas under pressure, the container including a valve for admitting and releasing the gas. As shown, the respirator 1 having a mouthpiece 10 is contained within a rubber bag 11, the bag being filled with air under pressure so that it is expanded and held within a casing 12 and an outer container 13. The rubber bag is fitted to a valve 18 and the casing 12 comprises two separate shells 15, 16 supporting the valve. To use the respirator, the valve is actuated to release air from the rubber bag so that the bag containing the respirator can be removed from the casing 12 and outer container 13. The rubber bag is then torn to release the respirator. The self-rescue respirator is suitable for use in a carbon-monoxide-containing atmosphere and includes a perforated base plate 7, an air-drying compartment 2 containing a lithium compound or mixture, a compartment 3 containing an activated metallic oxide for converting the carbon monoxide to carbon dioxide, a cooling compartment 4 containing a hydrated metallic sulphate, inlet and exhaust valves (8, 30), the mouthpiece 10, a nose clip, and head straps. The pressurized container is said to preserve the chemicals in the respirator.
Patent GB-634851-A (GB)
Title: Improvements in or relating to pressure control valves
IPC: F42C5/02
Filed: 1946-12-24
Abstract: 634,851. Pyrotechnic fuzes. SUMNER, C. G., and BLACKMAN, W. Dec. 24, 1946, No. 37864. [Class 9 (ii)] [Also in Group XXIX] A pressure control valve for a vessel containing a burning composition, such as a pyrotechnic delay device for use up to high altitudes, comprises two flexible diaphragms, substantially equal in area and coupled together, and so disposed that the external atmosphere will act on one side of each diaphragm to give no resultant pressure, the other side of one diaphragm is exposed to the pressure to be controlled, and the other side of the second diaphragm is subjected to a pressure substantially independent of the external atmospheric pressure. In an embodiment, the valve is constituted by the lower end of a tube 11 cooperating with a seat 16 adjustably mounted on an apertured disc 19, and the tube is carried by diaphragms 3, 4. The pressure of the gases in the vessel 21 act on diaphragm 3 to open the valve, and after passing into tube 11, the gases can escape to atmosphere through vent holes 12, 2 in the tube and valve casing, respectively. As the atmosphere has access to substantially equal inner faces of the diaphragms, the ambient pressure will have no effect on the point at which the valve opens. The loading of the valve is constituted by the pressure of the gas trapped in the chamber 10 above the upper diaphragm, or, if this chamber is evacuated, a loading spring is situated there.