baber/WOPTO huggingface dataset:
Patent GB-929650-A (GB)
Title: Process for the manufacture of acrylonitrile
Inventor: DUTTON BRIAN GORDON
Filed: 1960-03-15
Abstract: Bismuth salts of an arseno heteropolyacid, e.g. bismuth arsenomolybdate, arsenomolybdovanadate, arsenovanadotungstate and arsenomolybdotungstate are used as catalysts in the preparation of acrylonitrile from propylene, oxygen ammonia and water vapour at a temperature between 250 DEG  and 600 DEG C.  Examples describe the preparation of (1) bismuth arsenomolybdate by dissolving arsenic trioxide in an ammonia solution of molybdenum trioxide, concentrating and adding aqueous silica sol. followed by bismuth nitrate in nitric acid solution (2) bismuth arsenomolybdovanadate by adding molybdenum trioxide and arsenic pentoxide to a solution of ammonium metavanadate, adding silica sol. and finally a bismuth nitrate pentahydrate-nitric acid solution (3) bismuth arsenovanadotungstate by adding arsenic pentoxide to a mixture of tungstic oxide and vanadium pentoxide solution in caustic soda, boiling acidifying with sulphuric acid, separating the complex, adding silica sol. and finally bismuth nitrate solution (4) bismuth arsenomolybdotungstate by adding arsenic pentoxide to a mixture of tungstic oxide and ammonium molybdate solutions in caustic soda, boiling and adding hydrochloric acid aqueous silica sol. and finally bismuth nitrate in nitric acid solution.  The solutions thus prepared are evaporated to dryness, heated for 18 hours at 540 DEG C. and finally ground to suitable size.  The catalyst may be used as a fluidized bed, for example in a heated reactor tube of 1 inch diameter at from 400 DEG to 490 DEG C.ALSO:Acrylonitrile is prepared by contacting propylene, oxygen, ammonia, and water vapour at a temperature in the range of 250 DEG C. to 600 DEG C., in the presence of a bismuth salt of an arseno heteropolyacid as a catalyst.  Arsenomolybdic, arsenotungstic and arsenovanadic or mixed heteropolyacids thereof are specified. They are preferably supported on a silica, kieselguhr, or alumina carrier, and a fluidised bed may be used.  Air may be the source of oxygen and the propylene may be from the C3 stream from petroleum refinery or oil cracking which may include propane.  The products mainly acrylonitrile and by-product acetonitrile are separated by conventional methods.
Patent GB-884997-A (GB)
Title: Improvements in portable power tools
IPC: B23B45/04
Filed: 1960-02-15
Abstract: 884,997. Portable drilling &c. machines. ATLAS COPCO A.B. Feb. 15, 1960 [Feb. 17, 1959], No. 5309/60. Class 83 (3). A portable power tool, e.g. a drill, comprises a barrel 1, Figs. 1, 2 containing a motor driving a chuck 31, and a handle 2 extending from the barrel which has lateral wings 3, 4 below a ridge 5 forming grooves to receive thumb and forefinger of the operator's hand. A trigger 15, Fig. 4, for controlling the motor is provided under the barrel. The motor may be a rotary electric or compressed-air motor or a reciprocating motor. As shown, the barrel contains a rotary air motor 20 driving the chuck through an epicyclic reduction gear 27. Compressed-air is supplied to inlet 16 in the handle and is controlled by a valve 17 actuated by the trigger. Exhaust air from the motor passes through silencing chambers 22, 23, 25 and orifices 26 to atmosphere. Chamber 18 in the handle may contain lubricant conveyed to the air passage through the valve by a wick 19.
Patent GB-1407022-A (GB)
Title: Electrical equipment assemblies
IPC: H04Q1/02
Filed: 1972-02-04
Abstract: 1407022 Rack assembly for electrical equipment GENERAL ELECTRICAL CO Ltd 2 Feb 1973 [4 Feb 1972] 5321/72 Heading H1R An electrical equipment assembly in which a module 1 slides in guides 5, cantilevered from a rack 3, between an operative position and an inspection or maintenance position (as shown) has a conductive cable 10 held in a plastics clip 12. In the operative position the cable lies flush and parallel to one side of the module, flexing into the space behind the module when the latter is withdrawn from the rack. Cable 10 may be of the ribbon type. To retain the module, in its operative position latches 14 engage strikers 15. For total removal of the module together with plate 8, supporting part 7 of two part connectors 6, 7 and the cable; the latches and strikers are engaged and securing screws 9 are removed.
Patent GB-286294-A (GB)
Title: A method of producing photomechanical printing blocks
IPC: G03F7/06
Filed: 1928-02-20
Abstract: 286,294. Schwimmer, K. H., and Paweck, H. Feb. 20, 1928. Addition to 273,688. [A Specification was laid open to inspection under Sect. 91 of the Acts, March 5, 1928]. Photo-mechanical printing-surfaces.-In carrying out the process according to the parent Specification, the half-tone positive film image is reversed by transferring it to a prepared glass plate after developing it, and before washing it with warm water to remove the unexposed gelatin and making the electrotype.
Patent GB-122746-A (GB)
Title: Improved Means for use in Fixing a Fly Wheel to an End Flange of a Shaft, applicable also to analogous purposes.
IPC: F16D1/076
Filed: 1918-03-27
Abstract: 122,746. Austin Motor Co., and Austin, Sir H. March 27, 1918. Securing fly-wheels &c. on shafts.-Fly-wheels, &c. are secured to end or other flanges on shafts &c., particularly where the parts are difficult of access, by bolts D held tightly by driving or tapping and by keys d in one part C, the bolts passing through enlarged holes a<1> in the other part A. The drive is transmitted through split washers F conical exteriorly or interiorly and forced up by nuts d', with which they may be formed integral. Additional bolts E without conical washers may be used for clamping the parts A, C together without transmitting the drive.
Patent GB-599078-A (GB)
Title: Improved apparatus for delivering printed and like products in counted batches
IPC: B65H33/14
Filed: 1945-03-03
Abstract: 599,078. Sheet-delivery apparatus. HOE & CO., Ltd., R., TURRALL, G., and SKINNER, C. H. March 3, 1945, No. 5358. [Class 100 (i)] [Also in Group XXX] To deliver printed or like products in counted batches, the products leaving a machine are directed in counted batches alternately to two continuously-travelling batch supports, accelerated while on the supports to separate the batches in the direction of movement, and finally delivered from the supports to a single endless conveyer moving continuously at the speed of the accelerated batches. In one construction, Fig. 1, the stream of sheets leaving rollers 2, 3, are guided into a horizontal path by a member 8, before they reach the deflector 10 which diverts the alternate batches to conveyers 21, 22. The batches are accelerated by further conveyers 23, 24, which deliver them to a high-speed conveyer 28<1> in a single stream but with the batches separated from one another. Instead of using conveyers 23, 24, the conveyers 21, 22, may be driven by variable-speed gearing so as to accelerate each batch after it is formed. Co-operating with the conveyers are endless bands 29, 30, each of which has a resiliently-mounted guide roller 32 so as to yield in the event of a jam. The rollers carrying the conveyers 21, 22, and bands 29, 30, are mounted on frames 35, 39, 49, adjusted by screw mechanism 36, 41, 43, 47. A box-cam driven from the machine operates the deflector 10 through lever mechanism. In a modified construction, Fig. 5, separate batch supports 66 guided in an endless path are provided and are normally driven by lugs 67<1> on constant-speed chains engaging lugs 66<2> on the supports. Adjacent to the delivery end, other lugs on the supports are engaged by lugs 68<1> on faster-moving chains 68 to impart the required acceleration to the batches. To control the delivery of the sheets to the conveyer 21, rotary discs 56 with curved slots 57 in their periphery are provided, the front edge of each sheet entering the slots before being deposited on the conveyer.
Patent GB-675398-A (GB)
Title: Method and apparatus for printing electrically
Inventor: SCHAFFERT ROLAND M
IPC: G03G15/30
Filed: 1950-03-03
Abstract: 675,398. Producing photographs electrically. BATTELLE DEVELOPMENT CORPORATION. March 3, 1950, No. 5416/50. Class 98 (ii). [Also in Groups XVI and XXXV] Secured to an earthed electrically conductive drum 1 is a printing plate 9 (see Group XVI), comprising a flexible metal or other conductive backing and a non-conductive image layer, which is electrostatically charged by corona needles 30, 34. Powder triboelectricallyoppositely-charged flows from a hopper 11 to a receptacle 15 over part of the drum surface, and adheres to the image layer. The charge on the powder is increased by needles 34a of opposite polarity to needles 30, 34. A strip of transfer material such as paper is led from a roll 19 over part of the drum surface and thence over a shoot 23 to a take-up roll 24 driven in synchronism with the drum. The corona needles 30 produce a greater charge on the paper than on the image layer, and the powder is thus transferred to the paper, reproducing the image thereon, while the paper adheres to the drum by electrostatic attraction, and is removed therefrom by strippers 21. Needles 44 of opposite polarity may be used to loosen any powder left on the drum, which powder is removed by a cleaning device 38, which may be a wiping means, suction device, or air blast device. The needles 34 replenish the charge on the image layer, which was reduced by the needles 44. Fresh powder is then caused to adhere to the image layer as before. The powder image is fixed on the transfer strip by being fused into it by heating elements 37. The voltage of the supply for the needles is 5000-8000. and the needles may be 0.32 inch apart and <SP>7</SP>/ 16  inch from the image layer in the case of a negative charge, or 0.16 inch apart and # inch from the plate for a positive charge. Instead of the needles, an arrangement of spaced parallel wires axial to the drum, attached at their ends to insulating blocks, and mounted within a charging shield, the wires being about ¢ inch from the image layer and ¢ inch apart, may be used. The printing plate may comprise a backing of metal foil, and the design be traced on it with a non-conductive lacquer or paint, or the backing may be coated with a light-sensitive lacquer exposed to light through a negative, the unexposed portions being dissolved away and the image portion fixed by burning. A plate including a photo-conductive insulating layer may have a powder image produced thereon by electrostatic charging, exposure, and powder development, after which the image can be fused into the plate so as to become a permanent printing image.
Patent GB-1465835-A (GB)
Title: Minimum pressure cut-off valve
IPC: F16K17/04
Filed: 1975-04-28
Abstract: 1465835 Valves BOC INTERNATIONAL Ltd 28 April 1975 [6 Feb 1974] 05448/74 Heading F2V A valve for maintaining a predetermined minimum pressure within a gas cylinder, and attached within the cylinder to the normal cylinder valve, comprises a spool 18 having an annular seating surface (24) which coacts with an 0-ring 12 to close the valve. The spool is biased by two springs 20, 22 such that when the predetermined minimum pressure is reached in the cylinder the valve is closed. For re-charging the cylinder the spool moves in the opposite direction to that in which it opens to allow gas to flow out of the cylinders. Each half of the spool has a chamber 26 which opens into the outer surface of the spool between the seating surface (24) and the ends 25.
Patent GB-988056-A (GB)
Title: Process for the production of demethyltetracyclines
IPC: C07C233/00
Filed: 1962-02-13
Abstract: 7 - Chloro - 6 - demethyl - tetracycline is produced by cultivating a 7-chlorotetracycline-producing strain of the Streptomyces genus such as S. aureofaciens or S. viridofaciens in an aqueous nutrient medium under aerobic conditions in the presence of aminopterin or a salt thereof.
Patent GB-777280-A (GB)
Title: Improvements in or relating to the concentration of ore
IPC: B03B1/00
Filed: 1955-02-24
Abstract: 777,280. Jet mills; froth flotation and magnetic separators. TEXACO DEVELOPMENT CORPORATION. Feb. 24, 1955 [March 3, 1954], No. 5546/55. Classes 59, 82(2) and 117 A method of producing finely divided ore concentrate comprises mixing coarsely granular ore with a vaporizable liquid, heating the liquid to form a dispersion of the ore with the vapour, producing a high velocity turbulent flow in the dispersion to disintegrate the ore to relatively fine particles and separating the particles rich in values from the gaugue particles. As shown, a mixture of water and the coarse ore from a tank 11 may be passed through heater tubes 17 in a heater 19 and then to opposed jets 25, 27, in a jet mill. The high velocity in the jets breaks down the ore to fine particles which may be passed to a cooler 33 to which may be added water, and the pulp so produced may be subjected to froth flotation in an apparatus 41. In a modification, Fig. 3 (not shown), the opposed jets may be replaced by a nozzle in which the cross-section decreases and then increases. Instead of froth flotation, the separation may be made by a magnetic separator. In Fig. 4 this comprises a magnet 139 within a drum 137, the relatively non-magnetic middling material being carried counter-clockwise off the side of the drum into a receptacle 141; the magnetic concentrate is carried clockwise and taken off the drum by a clockwise rotating magnetic collector wheel 143. The separator shown in Fig. 5 consists of an inclined endless belt 161, the top run of which passes above an elongated magnet 163. Magnetic material is discharged at 165 and the non-magnetic particles flow off at 171 with the slurry water. Specifications 683,318 and 747,261 are referred to.
Patent GB-629161-A (GB)
Title: Improvements in and relating to synthetic resin products
IPC: C08L61/10
Filed: 1946-02-22
Abstract: In resinous moulding powders comprising a thermosetting synthetic resin, e.g. phenol or urea-aldehyde resins and cork dust, the latter to the extent of at least 75 per cent of its weight comprises particles smaller than 0.12 mm., preferably 0.075 mm. 300 gs. cork dust ground to a degree that 75 per cent by weight was formed of particles smaller than 0.12 mm. were mixed with 700 gs. alkaline-condensed cresol - formaldehyde resin and moulded to form a plate which was found to have an impact value and bending strength of 11.1 kg. cm/cm2 and 600 kg/cm2 respectively.  Cork dust is graded into particles of size 0.2-0.3, 0.15-0.2, 0.12-0.15, 0.102-0.12, 0.075-0.102, and particles smaller than 0.075.  300 gs. of the coarsest and finest grades were mixed separately with 700 gs. urea-formaldehyde resin and moulded in the form of plates which were found to have impact values of 5.3 and 10.8 respectively.
Patent GB-1493049-A (GB)
Title: Turbofan engine
IPC: F02K3/04
Filed: 1975-02-10
Abstract: 1493049 Gas turbine ducted fan engines GENERAL ELECTRIC CO 10 Feb 1975 [25 Feb 1974]  5589/75 Heading F1J The invention relates to a gas turbine ducted fan engine which comprises a first fan and a second fan also a first fan or by-pass duct and a second fan or by-pass duct. The engine shown in Fig. 1 comprises a first fan 34, a second fan 40, a core engine comprising a compressor 24, combustion equipment 26, a first turbine 80 which drives the compressor 24 through shaft 82, a second turbine 90 which drives the second fan 40 through shaft 94, and a third turbine 102, 104 which drives the first fan 34 through shaft 110. The engine also comprises a core engine casing 49, an intermediate casing 51  which defines with the core engine casing a first fan duct 48, and an outer casing 12 which defines with the intermediate casing a second fan duct 52. The rotor blades of the first and second fans 34 and 40 are of variable pitch. The stator blades 36, 38 of the first fan, the stator blades 42 of the second fan are also of variable pitch and the first three rows of stator blades 60, 62, 64 of the compressor are of variable pitch. The inlet guide vanes 75 of the compressor-drive turbine 80 are of variable pitch as are the inlet guide vanes 92 of the fan-drive turbine 90 and the inlet guide vanes 106 of the fan-drive turbine 102, 104. The air inlets 56 and 50 to the core engine and first fan duct 48 are downstream of the second fan 40; the air inlet 54 to the second fan duct 52 is downstream of the first fan. Combustion equipment 119 is disposed in the first fan duct 48 and has associated therewith retractable flame stabilizing equipment 120. The core engine flow duct, the first fan duct and the second fan duct terminate in annular discharge nozzles 116, 118, 126, flaps 122 being pivotally mounted on the intermediate casing 51, the flaps being positioned as shown in Fig. 1 for subsonic operation the flaps defining a convergent nozzle 118 at the outlet of the first fan duct; in Fig. 2 the flaps 122 are pivoted outwardly to close off the outer fan duct and to provide a convergent-divergent nozzle outlet to the inner fan duct; the flame-holder 120 is in the operative position and the duct burner 119 is operative; this is the mode for supersonic operation. In Fig. 3 the core engine, the inner fan duct and the outer fan duct discharge into a common nozzle 150 defined by variable flaps 164. The flaps 164 also the flaps 166 are pivoted outwardly, Fig. 4, (not shown) for supersonic operation, flow through the outer fan duct being thereby closed off. In Fig. 5, (not shown) the single fan-drive turbine 212, 214, 216 drives both the first fan 184 and the second fan 190 through shaft 192.
Patent GB-191642-A (GB)
Title: Improvements in or relating to mops and other rubbing or polishing appliances
IPC: A47L13/46
Filed: 1922-02-25
Abstract: 191,642. Coppock, E. Feb. 25, 1922. No Patent granted (Sealing fee not paid). Handles with clamping-devices for mops and tools.-A mop, squeegee &c., of the type in which the mop-head or rubber strip &c. is clamped by bolts in hinged jaws carried by a handle, has both of the jaws hinged to a crossbar attached to the handle by a spike or other means. The mop-head G or rubber strip, duster &c., is clamped between jaws D, E by means of bolts I and wing-nuts J. Both jaws D, E are hinged at F to a cross-bar B secured by a spike C to the handle A. In the construction shown the spike C is riveted to the cross-bar B and also to the jaw D, so that this jaw is held stationary.
Patent GB-854328-A (GB)
Title: Improvements in or relating to expansible containers
IPC: B65D5/355
Filed: 1958-02-20
Abstract: 854,328. Boxes of variable capacity. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 20, 1958 [April 30, 1957], No. 5592/58. Class 18. A box of variable capacity comprises a part B sliding longitudinally in a base A, end flaps 25, 26 being folded in according to the length of box required. The box is intended for tabulating cards the thickness of which may vary between limits, the flaps 25, 26 being bent inwardly along lines 22 if the cards are of minimum thickness and being bent along lines 48 if of maximum thickness. A portion of the box blank lying between flaps 25, 26 and joined to edge 10a of the base part is detached and stacked behind the last card and adjacent the end wall 62. The vertical edges of the detached portion are crushed and folded over. Portions 41 are pressed inwardly to hold flaps 57 on the part B. The other end of the box is formed -by flaps 27, 28, 31 and by flaps 36, 37, 38, flap 36 being bent over parallel to the base 10 to lie on top of the cards. Portions 43 are pressed inwardly to hold flaps 37, 38 in position. A tab 45 is provided for pulling the box from store. A slot 46 facilitates identification of the contents of the draw if the end card is suitably marked in a position corresponding to the slot.
Patent GB-180412-A (GB)
Title: Improvements in or relating to sparking plugs for internal-combustion engines
IPC: H01T13/46
Filed: 1921-02-18
Abstract: 180,412. Harrison, C. S. Feb. 18, 1921. Sparking-plugs.-A ball or other freely movable member 22 is placed between the terminal 13 and perforated disc 18. These three members are preferably made of nickel. The insulator may be extended as indicated in broken lines. Reference has been directed by the Comptroller to Specifications 20248/12, 13605/14, 122,617, 137,254, and 167,658.
Patent GB-1426534-A (GB)
Title: Waveguide switch
IPC: H01P1/15
Filed: 1974-02-07
Abstract: 1426534 Waveguide switches STANDARD TELEPHONES & CABLES Ltd 7 Feb 1974 05675/74 Heading H1W [Also in Division H4] A waveguide switch comprises a PIN diode across the guide between terminal connections providing inductance and capacitance such that when the diode is ON a series-resonant circuit within the frequency band of operation is provided, and when the diode is OFF a seriesresonant circuit outside the band of operation is provided. Thus, when the diode is ON, the guide is effectively short-circuited. In order to increase the frequency separation of the two resonant conditions, the inductance of the terminal connections is made relatively low. In the symmetrical arrangement shown, the inductive/capacitative members are realized as printed areas 16 (delineated by broken line) on PTFE glass-fibre substrates 20a, 20b. Sufficient extra capacitance to provide series resonance in the operative band when the diodes are ON, is provided by capacitors 15, and the diodes 1a, 1b are connected between the upper plates of these capacitors. Bias supply leads 18 are also connected between these plates and supply terminals 22 on the top plates of bypass capacitors 19. Each supply lead incorporates a quarter-wavelength choke. The bandwidth of the switch may be improved by staggering the series-resonant frequencies of the two circuits. Multisection switches incorporating PIN diodes spaced along a waveguide at quarter wave intervals (Figs. 19-21) are described. The switches may be used in evanescent-mode waveguides (see Specification 1,129,185).
Patent GB-693523-A (GB)
Title: Improvements in machines for applying a strip of paste to a travelling web
IPC: A24C5/24
Filed: 1951-03-08
Abstract: 693,523. Coating webs. AMERICAN TOBACCO CO. March 8, 1951 [March 10, 1950], No. 5682/51. Class 140. Paste to be applied in a narrow strip to a travelling paper web, e.g. in a cigarette making machine, is fed from a container 12 through an orifice 16 to a feed screw 4 rotating in a fixed bushing 3, and on reaching the other end of the feed strew passes through a radial hole 18 to a central bore 19 communicating with a nozzle 20 mounted on the feed screw which applies it to the paper web. The threads of the feed screw increase in depth from the inlet end to the outlet. At the opening 16 the bore of the bushing 3 is eccentric which eliminates air bubbles from the paste. Leakage of paste from the feed chamber is prevented by end seals 7. The device is rotatably mounted on a vertical post 36 so that it may be swung from an operative position in which a gear 23 fixed to the shaft of the feed screw 4 meshes with a driven pinion 25, to an inoperative position. The device is vertically adjustable on the post 36 to vary the position of the applied strip of paste. ,Reference has been directed by the Comptroller to Specification 594,024.