baber/WOPTO huggingface dataset:
Patent GB-1388669-A (GB)
Title: Process for reducing the concentration of nitrogen  oxides in  gases
IPC: B01D53/56
Filed: 1972-10-23
Abstract: 1388669 Removal of nitrogen oxides from gas streams E I DU PONT DE NEMOURS & CO 23 Oct 1972 [21 Oct 1971] 48760/72 Heading C1A [Also in Division C5] The concentration of nitrogen oxides in a gas containing said oxides at a state of oxidation (as defined), of at least 50% is reduced by mixing with an ammonia-containing gas the molar ratio of ammonia to said oxides (calculated as NO) is at least 1À0, and with water in an amount of at least 0À1% of the entire gaseous mixture, the ammonia and nitrogen oxides reacting and thereafter heating the reaction products to cause them to decompose. Reaction with the ammonia is preferably carried out at a temperature of less than 100‹ C. for at least 5 seconds, and the decomposition is carried out at at least 200‹ C. The molar ratio of ammonia to the nitrogen oxides is preferably at least 1À20. The process may be carried out batchwise or continuously.
Patent GB-487683-A (GB)
Abstract: 487,683. Time switches. HETEREN, K. W. T. VAN. Dec. 21, 1936, No. 35088. [Class 38 (v)] A time switch for controlling the heating periods of a periodic absorption refrigerator comprises a spindle F driven by means of a pin N engaging a slot in a hollow shaft E of a synchronous motor B. The spindle F carries a disc A on the underside of which are mounted three pins C adapted to engage the ON and OFF tappets D<2>, D<1> of a switch controlling the heating element. The pins C are equally spaced and the angular separation of the tappets D<2>, D<1> is such as to give three heating periods per day each of one and a half hours duration. The pins C are of different lengths and so by raising the disc A so as to remove the pins successively out of the path of the tappets D2, D<1> any or all of the heating periods may be cut out. An extra pin G is provided which engages the OFF tappet D' in all positions of the disc A to guard against the disc being raised to the inoperative position during a heating period. In order to effect raising and lowering of the disc A, the spindle F is mounted in ballbearings in a member J having a cam groove P engaged by a spring-pressed ball L in a member H which can be rotated by a knob M to move the disc A axially into its four positions. In a modification, the pins C engage only the ON tappet, and the OFF tappets is engaged in all positions of the disc A by a second set of pins extending from the upper side of the disc. In a further modification, a series of holes are provided in the disc A in any of which the pins may be placed and so the duration of the heating periods may be varied.
Patent GB-1404289-A (GB)
Title: Electrophoretic coating
IPC: C25D13/20
Filed: 1973-10-23
Abstract: 1404289 Electro-phoretic coating with polymers; zinc and copper plating A J JONES (E I Du Pont De Nemours & Co) 23 Oct 1973 49206/73 Headings C7B and C7F An article having at least the surface made of Al, Sn or an alloy thereof is coated with Cu or Zn before electro-phoretically coating with a filmforming polymer. The Cu or Zn layer may be continuous and sufficiently thick (e.g at least 0À001 mil) to prevent formation of gas bubbles during electro-phoretic coating. The Cu or Zn may be applied from a melt, by chemical displacement or by electro-plating; two coats of Zn may be applied. Specified baths include: chemical plating; aq ZnBF 4 /NiBF 4 /NH 4 Cl or ZnSO 4 /HF; electro-plating; aq ZnCl 2 /NaCN/NaOH (or Na 2 CO 3 ), ZnCl 2 /NaOH/KCN/NH 4 OH, NH4 pyrophosphate/oxalic acid/Cu oxide/triethylamine and NaOH/ZnO/polyethyleneimine, polymer baths; acrylonitrile-butylacrylate-methacrylic acid terpolymer/H 2 O/butyrolactone/PF resin. In examples Al wire, after degreasing and annealing is coated and the polymer baked on.
Patent GB-1449779-A (GB)
Title: Glass band width control in a float process
IPC: G05D5/00
Filed: 1974-11-14
Abstract: 1449779 Controlling width of glass sheet CENTRAL GLASS CO Ltd 14 Nov 1974 [14 Nov 1973] 49332/74 Heading C1M The width of a glass band made by a float process is controlled by detecting visible radiation from the band edges to produce, electrical edge position signals, converting these signals into a signal representing the width of the band and regulating the position of the tweel at the glass melt inlet to maintain the width signal substantially constant. The float glass chamber has an inert gas therein, the band is taken off the melt by rollers and the edge detectors and the width signal generator are arranged to emit a warning signal when any signal produced is outside preselected limits.
Patent GB-1453854-A (GB)
Title: Magnetic recording and/or reproducing apparatus having automatic tape drive control function
IPC: G11B15/08
Filed: 1973-10-26
Abstract: 1453854 Cartridge-type magnetic tape recorders MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 26 Oct 1973 [27 Oct 1972 (4) 10 May 1973] 50049/73 Heading G5R A recording and/or playback apparatus for use with a magnetic tape cartridge 101, Fig. 1, has an automatic control circuit arranged so that in response to loading of the cartridge into the apparatus a leader tape is payed-off and automatically threaded to a take-up reel 109, a tape transducing state is then brought about, forward tape movement is stopped in response to the detection of a transparent trailer tape by a light source and sensor, 119, 120, Fig. 1, 29, 30, Fig. 3, and the tape is subsequently rewound and the cartridge ejected on completion of rewind. A video tape recorder has a tape guide 106 extending from adjacent the outlet of cartridge 101 to a point A, a slot being formed in one side of the guide along the entire length thereof, the slot width being greater than that of the magnetic tape but less than that of the leader tape which has some rigidity. Rotary video heads 107, an erase head 115, a sound and control signal head 116, a capstan 117 and pinch roller 118 are also provided. A switch 2, Fig. 3, closes when the cartridge is loaded, and at the end of a delay period sufficient for the pay-off and threading of the leader tape a delay circuit 1 gives an output signal in response to which circuit 5 produces a control signal causing a hold circuit 14 to energize a solenoid 17 to produce playback. A circuit 28 subsequently detects the transparent trailer and causes a circuit 6 to produce a control signal to stop the tape for about 1 sec. At the end of the stop period an inverted signal from transistor 43 energizes rewind solenoid 16 via hold circuit 13. A switch 4 on a tape length counter closes at a zero count during rewind and after a delay of about 1 sec., sufficient for the leader tape to be wound back into the cartridge, an output from delay circuit 3 causes control circuit 6 to stop the tape for about 1 sec., whereafter a signal from control circuit 5 is coupled to transistor 46 to energize eject solenoid 48. Manually operable switches 23, 25, 27 and 35 produce rewind, playback, fast feed (by means of solenoid 18) and stop conditions respectively. A switch 55 closes when the tape reaches a pre-set position and acts on circuit 6 to produce a change of mode straight from fast-forward to playback at the pre-set point. The circuitry may be modified to allow repeated playback and rewind between some pre-set point and the end of the tape, Fig. 8 (not shown), to allow reproduction of a "still" picture, Fig. 9 (not shown), and to stop the tape and then rewind it in the event of the light source 29 burning out, Fig. 10 (not shown).
Patent GB-1485024-A (GB)
Title: Door
IPC: E06B7/23
Filed: 1974-11-19
Abstract: 1485024 Doors JOSEF GARTNER & CO 19 Nov 1974 [21 Nov 1973] 50056/74 Heading E1J A door comprises a leaf 1 with a side edge adjacent a jamb surface 7 defining a doorway, the side edge carrying a sealing strip 11 with a curved lip which engages the surface, the door hinge axis 5 being on the convex side of the seal. The edge and surface are spaced so as to prevent trapping of fingers. The leaf may be part of a folding door assembly with pairs of adjacent doors (1, 2 or 3, 4) hinged together, gaps between the leaves and free edges of adjacent leaves being closed by similar seals.
Patent GB-1502960-A (GB)
Title: Multipactor discharge tuned resonant cavity devices
IPC: H01J23/213
Filed: 1975-12-06
Abstract: 1502960 Magnetrons; tuning cavity resonators ENGLISH ELECTRIC VALVE CO Ltd 6 Oct 1976 [6 Dec 1975] 50158/75 Headings H1D and H1W In a multipactor discharge arrangement for tuning a resonant cavity device, generally similar to that disclosed in Specification 1,502,658, but in which, also, positioning of the multipactor arrangement at one quarter wavelength from the cavity is permitted, the transmission line coupled to the cavity is of a length equal to a half wavelength, on a multiple thereof, and is short-circuited at its end remote from the cavity, whereby heat dissipation from the line is improved. For the magnetron tuning arrangement of Fig. 2, the inner of the two coaxial multipactor electrodes 10 and 11 is integral with the coaxial line inner conductor 7, while the outer conductor 11 is supported by a conductor 28 extending through and insulated from the coaxial line outer conductor 6, whereby a bias may be applied to conductor 11. Alternatively, the outer multipactor electrode may form part of the coaxial line outer conductor (Fig. 1, not shown), the line including insulators (12) and a half-wave choke (14) to permit biasing. The coaxial line inner conductor may include coolant conduits (e.g. 16 and 17, Fig. 1, not shown). In a further embodiment, Fig. 3, the inner coaxial line conductor is interrupted at 21, approximately a quarter wavelength from the magnetron anode, the outer portion being adjustable by a screw arrangement 22 at the short-circuited end to vary the coupling between the multipactor arrangement and the magnetron.
Patent GB-1253975-A (GB)
Title: Ethynylation catalyst
Inventor: KIRCHNER JACK ROBERT
IPC: C08F4/10
Filed: 1968-10-23
Abstract: 1,253,975. Catalysts comprising copper acetylide. E.I. DU PONT DE NEMOURS & CO. 23 Oct., 1968 [23 Oct., 1967], No. 50416/ 68. Heading B1E. [Also in Division C2] A particulate ethynylation catalyst consists solely of or comprises a cuprous acetylide complex which contains at least 1.75 atoms of carbon per atom of copper, the catalyst having a total surface area of at least 5.0 square metres per gram and at least 75 weight per cent of the particles of catalyst having a crosssectional dimension of at least 5.0 microns. It is preferred that essentially all of the particles of catalyst have at least one cross-sectional dimension greater than 3 microns and that the average particle size of the catalyst is from 10 to 20 microns. Cuprous copper preferably constitutes at least 20 weight per cent of the catalyst which preferably is substantially free of metallic copper. The cuprous acetylide complex preferably comprises copper, carbon, hydrogen and oxygen in proportions such that the complex may be represented by the general formula: wherein w x and y each represents an integer, preferably less than 100; and z represents zero or an integer, preferably less than 100, It is preferred that x represents an integer from y to 2y and that the sum of x and 2y represents an integer from 0.5w to 1.5w.. The catalyst additionally may contain support material, for example carbon or silica, and/or a cuprene inhibitor, for example bismuth oxide, and/or an acid acceptor, for example calcium carbonate, and/or at least one copper acetylide complex other than the cuprous acetylide complex according to the invention. The catalyst may be prepared by a process in which formaldehyde and acetylene are reacted simultaneously with a particulate cupric compound, for example cupric oxide, cupric hydroxide, cupric silicate, cupric phosphate or a basic cupric carbonate, for example a synthetic malachite in which the CuO to CO 2  mole ratio is between I to I and 3 to 1. It is preferred that the cupric compound is in the form of particles having a cross-sectional dimension of at least 2.0 microns, has a surface area of at least 5.0 square metres per gram and contains less than 0.2 weight per cent of sulphur calculated as sulphate ion. The reaction may be effected in an aqueous medium and in the presence of an inert gas, for example nitrogen, methane or carbon dioxide. The particulate catalyst may be used in the ethynylation of a carbonyl compound by an acetylenically unsaturated hydrocarbon in an aqueous medium in the presence of the catalyst in slurry form. It is preferred that such ethynylation reaction is effected continuously and that the reaction mixture contains from 1 to 10 parts by weight of cuprous copper per 100 parts by weight of mixture. Examples relate to the preparation of 1, 4-butynediol (and propargyl alcohol) from formaldehyde and acetylene.
Patent GB-1032714-A (GB)
Title: Treatment of powdered pigments
IPC: C09C1/56
Filed: 1963-12-24
Abstract: <PICT:1032714/C1/1> Powdered colloidal pigments are treated with a pigment-reactive gas to alter the chemical surface characteristics thereof by chemisorption or reaction of the gas therewith, by maintaining within an elongated, rotatably mounted cylindrical treating chamber 2 (Fig. 2), a body of treating gas which enters at 12, and a plurality of partitioned beds of the pigment residing between longitudinally extending baffles 5, continously rotating the chamber, e.g. by means of trunnion rolls 6, thereby continuously elevating the beds of pigment, and allowing the pigment particles to fall by gravity in a dispersed state through the body of treating gas, substantial aggregation of the pigment particles being exhibited by the curbing effect of the baffles, the amount of pigment present and the rate of rotation of the chamber, the motion of the body of gas being sufficiently slow to avoid suspension of a substantial portion of the pigment particles therein.  The pigment may be C black, SiO2, Al2O3, TiO2 or Fe oxides and the reactive gas air, O2, O3, NH3, amines, halogens, halides, water vapour, nitrogen or sulphur oxides.  A carrier gas inert to the pigment may also be present as a diluent for the reactive gas. A particular example involves the treatment of a freshly produced oil furnace carbon black, which has been elutriated by suspension in dry air to reduce its moisture and other volatile content, with dry air containing 1-3% by weight of ozone.
Patent GB-1410635-A (GB)
Title: Manufacture of oriented thermoplastics containers
IPC: B29C49/58
Filed: 1972-11-07
Abstract: 1410635 Injection-blow moulding CONTINENTAL CAN CO Inc 7 Nov 1972 [24 Nov 1971] 51247/72 Heading B5A Molecularly oriented hollow articles are formed by injection moulding a cylindrical parison, cooling the exterior surface wall of the parison adjacent the mould more than the interior surface of the parison adjacent the core, removing the parison and core from the mould and then allowing reheating of the exterior surface by heat transfer from the interior portion of the parison and then blow-moulding the parison. As shown in Fig. 2, the apparatus comprises a turntable 40 having arms 42 each carrying a core 52 indexable at injection station A, holding station B, blowing station C and ejection station D. At A, a parison 5 is injected by nozzle 4 around core 52 in mould 15. Cores 52 are preferably maintained at about the glass transition temperature Tg of the polymer by fluid passed through ducts 50, 51 and the mould 15 at a lower temperature by fluid passed through ducts (20, Fig. 1, not shown) so that the interior and exterior surfaces of the parison are brought to these temperatures. The upper mould half and turntable are then raised and turntable 40 rotated to bring parison 5 to the holding station B where it achieves a more uniform temperature just above Tg at which it is blow moulded at C by air supplied into core 52 through duct 61. The blown article is removed from core 52 at station D by stripper 32. The blow mould may also be cooled by cooling ducts (29, Fig. 1, not shown). Expansion may alternatively be effected by vacuum. The material is preferably a nitrile polymer, e.g. a copolymer of olefinically unsaturated nitriles, e.g. acrylonitrile, methacrylonitrile and ethylenically unsaturated comonomers, e.g. alkyl acrylates, styrene and graft copolymers of the above copolymers with diene rubbers. Several such apparatus may be vertically stacked one upon the other or placed side by side.
Patent GB-1197299-A (GB)
Title: Improvements in Short-Circuiting Means for Current Transformers
Inventor: JAAKSOO LEMBIT
IPC: H01F38/30
Filed: 1967-11-13
Abstract: 1,197,299. Electric couplings. ALLMANNA SVENSKA ELEKTRISKA A.B. 13 Nov., 1967, No. 51431/67. Heading H2E. [Also in Division H1] Contact jacks 9 connected via cables 13 to the secondary circuit of a transformer are short circuited when apparatus such as plug-in relay 20 is disconnected by a conductive body 4 spring loaded within aperture 3 in insulating body 2. The lengths of pin 22 on relay 20 and guide pin 14 on body 4 are such that on insertion plugs 21 make good connection with contacts 9 before body 4 is pressed so far to the right that the short-circuit connection is broken.
Patent GB-1103797-A (GB)
Title: Improvements in switching circuits
Inventor: DAHELE HARCHARAN SINGH
IPC: H03K17/73
Filed: 1965-12-03
Abstract: 1,103,797. Semi-conductor switching circuits. A. C. COSSOR Ltd. 25 Nov., 1966 [3 Dec., 1965], No. 51466/65. Heading H3T. A switching circuit for connecting a load comprising one or more PIN diodes 10 to a lowvoltage source 15 for forward biasing or to a high-voltage source 18 for reverse biasing, comprises a transistor VT2 in series with the source 15 and a semi-conductor controlled rectifier D2 in parallel with source 18, these being both conductive or both non-conductive. When VT2 conducts the source 15 is connected to the load 10, and source 18 is short-circuited by rectifier D2. When a pulse or a periodic signal 19 is applied to terminal 20, VT1 conducts and cuts off VT2 and rectifier D2 thereby connecting the source 18 to the load 10. In a modified circuit, Fig. 2 (not shown), the transistor (VT2<SP>1</SP>) is in series with the rectifier (D2<SP>1</SP>) across the high-voltage source 18, and is switched by a complementary transistor (VT1<SP>1</SP>) in its base circuit.
Patent GB-1412748-A (GB)
Title: Heating or cooling radiator
IPC: F28F27/00
Filed: 1972-11-09
Abstract: 1412748 Heating or cooling radiators MENK APPARATEBAU GmbH 9 Nov 1972 [8 Dec 1971 26 Aug 1972] 51741/72 Heading F4S A sectional radiator for heating or cooling (in particular a radiator for cooling the oil of an oil filled transformer tank) comprises upright hollow-plate elements 1 having at least at their upper ends, enlargements which co-operate with a pipe 10 to form a header. The pipe has a longitudinal cut-away portion remote from that end of the pipe which connects the radiator to an inlet flow of hot or cold fluid, and the cutaway portion connects certain of the elements 1 directly to said inlet flow (as shown by the arrows in Fig. 3) whilst that portion of the pipe 10 which is not cut-away screens the elements nearest to the inlet from the direct flow of inlet fluid.  In a further form (Figs. 4, 5) the radiator elements. (18-21) remote from the fluid inlet are instepped arrangement, and the cut-away part of the feed pipe (23) is constituted mainly by a U-shaped closure member (24).
Patent GB-1074429-A (GB)
Title: Compressor unloading arrangement
IPC: F04B49/03
Filed: 1964-12-21
Abstract: 1,074,429. Compressors. CHRYSLER CORPORATION. Dec. 21, 1964 [Jan. 8, 1964], No. 51804/64. Heading FIN. [Also in Division G3] A control system for unloading the reciprocating compressor of a refrigeration plant in response to a predetermined temperature in the cold room or pressure in the low-pressure conduit comprises a solenoid-actuated control valve (112), Fig. 3 (not shown) a relay valve (118) controlling a singleacting piston (166) engaging a stud (188) provided in the end (186) of a yoke (152), the latter being pivotally mounted at (154) and straddling the compressor cylinder (36) to engage at (180) a ring (52) slidable relative to the cylinder to unseat the suction valve (46) via pins (54), a spring (178) being provided to urge the yoke to a position where the ring unseats the valve. In operation, the occurrence of a predetermined temperature or pressure causes a signal to be transmitted to the solenoid coil (110) to raise valve member (112) against a spring (115) from a seat member (88), thereby allowing oil supplied from the crank-case by a pump (146) to flow, via a chamber (142) and passages (138, 196, 198, 200, 202 and 120), to a chamber (116) where it causes relay valve piston (118) to move against a spring (124) to the operative position. Oil can then flow, via passage (132), annular chamber (208), passage (210) and pipe (70) to the cylinder (164) to cause the piston (166) to load the compressor against spring (178). When the temperature or pressure rises to a predetermined value the solenoid is de-energized and valve member (112) seats on member 88 thereby cutting off the supply of oil to chamber (116). The oil in the chamber exhausts to the sump via a filter (216) Fig. 4 (not shown) and bleed port (214), thereby allowing the piston (118) to move under the action of spring (124) to bring an annular groove (130) in the piston into register with chamber (208), thus allowing the oil in the cylinder (164) to exhaust to the sump via radial ports (134) and axial passage (136). The piston (166) then moves under the action of spring (178) and the compressor is unloaded. In an alternative embodiment Fig. 5 (not shown), not all of the oil passes through the relay valve chamber; instead, that oil which does reach the chamber, via a route similar to the above, moves the relay valve piston which then inter-connects the supply from the pump and a chamber such as (208). A control circuit is described with reference to Figs. 7 and 8 (not shown) which allows the cylinders of a multi-cylinder compressor to be successively unloaded in accordance with the required temperature and pressure. In this latter embodiment, the motor (264) driving the compressor is supplied via relay (250), the coil of the latter being energized when a switch (288) is closed. During starting, a time-delay switch (287) is open to prevent the solenoids (110'a - 110'd) from loading the compressor.
Patent GB-1362638-A (GB)
Title: Copper salt catalyst
IPC: C01B7/04
Filed: 1972-11-10
Abstract: 1362638 Oxidative chlorination catalysts, Deacon catalysts MONSANTO CO 10 Nov 1972 [12 Nov 1971] 51976/72 Heading B1E [Also in Divisions Cl and C2] Catalyst compositions are prepared by dry mixing an anhydrous cupric halide with a specified activated alumina and heating the mixture at 300-600C. The specified activated alumina has a weight loss on ignition at 1000C of 3-8%, a sodium content less than 0.05 wt % as Na 2 O and a crystalline structure derived from a mixture of boehmite and γ-alumina, having an X-ray diffraction pattern displaying lines at 1.38-1.40; 2.33-2.38; 1.96-2.00; 6.1-6.2; 1.83-1.88 and 3.1-3.2; the strongest line being at 1.38-1.40, and having an average crystallite size of 50-100<SP>+</SP> based on the width of the 3.1-3.2 line and of 30-40 based on the width of the 1.96-2.00 line.
Patent GB-1489979-A (GB)
Title: Triazolo benzo-diazepines and triazolo benzodiazocines
IPC: C07D403/06
Filed: 1975-12-19
Abstract: There are prepared compounds of the formula <IMAGE> in which the substituents are defined in Claim 1. The compounds are obtained by reacting a 3-amino-3,4-dihydro-4-hydroxy-4-phenylquinazoline with one equivalent of phthalimidocarboxylic acid derivative. The reaction is carried out in an organic solvent at 0-100 DEG C. The reaction product is then cyclised to the compound IV with an optionally halogen-substituted carboxylic acid having 1-3 C atoms at 80-120 DEG C. There are likewise prepared compounds of the formula <IMAGE> in which the substituents are defined in Claim 6. These are obtained from the compounds of the formula IV by heating them with hydrazine hydrate, methyl-, ethyl- or propylamine at 25-100 DEG C with a mineral acid or in an alcohol having 1-3 C atoms. The compounds of the formula V can be used as tranquillizers, sedatives and hypnotics.