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Month in the Patent Office

Month in the Patent Office arrangement according to FIG. 4a the direction of the jet is controlled by two sets of pivoted vanes 27, 28, one set closing the nozzle while the other permits free flow. These abstracts of British Patent Specifications are condensed, by permission, from the official 730,818. Launching carriages. Vickers-Armstrongs Ltd. Application, March 3, 1953. specifications. Copies of the full specifications are obtainable from the Patent Office, 25 Southampton A launching carriage is steered by the pilot of the Buildings, W.C.2, price 3s. each. aircraft, without the provision of any steering control link between the aircraft cockpit and the carriage, by so arranging the carriage wheel axles that the applica­ tion of a rolling moment to the aircraft results in the carriage being steered in the same direction as that in 729,573. Pressure-tight seals. A. V. Roe Canada which the aircraft would turn in free flight under the Ltd. Application, June 17, 1952. moment. For this purpose either or both of the carri­ A seal for the canopy 13 of a pressurized cockpit age axles 11, 12 are connected to the carriage body consists of an inflatable tube 23 disposed in a channel 10 by shafts 17, 18 lying in the fore-and-aft plane of 20a secured to the cockpit framing and having wall symmetry but slightly inclined to the horizontal so portions 21, 22, the arrangement being such that when that if, as shown in FIG. 5, a moment is applied to the inflated the tube bears against the wall 21 and forces aircraft 15 tending to roll it and the carriage 10 to a blade member 24a attached to the canopy into starboard, the axles 11, 12 are caused to pivot about scaling contact with the wall 22. The latter is of the shafts 17, 18 so that they converge to a point on curved cross-section to provide a convex sealing sur­ the starboard side and thus cause the carriage to face, while a tube-retaining flange 21a is formed at turn in that direction. Return springs may be attached the tip of the wall 21. Expansion of the plastic canopy to the shafts 17, 18 to make the carriage return auto­ matically to a straight path when the applied rolling moment ceases. The aircraft is supported on a pillar 14 with freedom to align itself with the relative wind during the take-off run. panel 13 relatively to the framing 126 results only in movement along the surface of the blade 24a, in 8 in the trailing edge 5, and further apertures 6, 7 in which direction the blade is subject only to frictional the upper and lower surfaces 3, 4 at the beginning of constraint in the co-acting channel. When the tube 23 the break-away zones, so that under the centrifugal is deflected the clearance between it and the blade head set up when the blade is operating the boundary 24a allows the canopy to be opened without causing layer over the leading edge portion is drawn through rubbing between the tube and blade. the apertures 6, 7 into the interior of the blade and discharged through the apertures 8, thus preventing turbulence over the trailing edge. In certain cases it 730,009. Boundary layer control in ducts for fluid may be sufficient to provide apertures in cither the flow. Fairey Aviation Co. Ltd. Application, January upper or lower surface, not both. 2, 1952. Turbulence in a bend in a duct is avoided by with­ drawing the boundary layer at the inside and outside 730,585. Jet deflectors. Power Jets (Research and Development). Application, May 30, 1952. In an arrangement for deflecting a propulsive jet downwardly to reduce the landing speed of an aircraft the axis of the downwardly projecting nozzle is arranged to pass through or near a transverse line through the centre of gravity of the machine. If several such nozzles are provided they are arranged so that the resultant line of thrust satisfies this con­ dition. A number of jet deflectors are described, that shown in FIG. 4c consisting of a hinged plate 8a with side pieces 86, that in FIG. 4b of a slidable box member 18, and that in FIG. 4d of a rotary valve 38. In the surfaces of the bend and then returning it to the main stream at a downstream point. In the arrangement BOOKS RECEIVED shown porous panels F, G are fitted at the bend in a duct A and a venturi section H formed in the duct Mechanical Engineering Research 1954. Department downstream of the bend, the portion of the duct ex­ of Scientific and Industrial Research. [H.M. tending from the bend to downstream of the venturi Stationery Office. 3s.] being surrounded by a jacket J forming an annular Standardization—An Aid to Productivity. Action space between it and the duct. The venturi throat N is Pamphlet No. 4. [British Productivity Council. 9d.] perforated, so that when fluid is flowing the boundary layer is sucked through the panels F, G and the per­ Timbers of South-East Asia. Gerald Hart. [Timber forations in the throat N, from which it returns to the Development Association Ltd., 21 College Hill, main stream. When only a small flow is involved the E.C.4. Free of charge from the Association.] jacket J may be replaced by a number of separate Standards in Industry (Planning No. 381); The British tubes, each fitted with a throttling device to control Standards Institution (Planning No. 382). [Political the rate of flow. Since the arrangement operates auto­ and Economic Planning, 16 Queen Anne's Gate, matically whenever fluid is flowing, the fitting of a S.W.1. 2s. 6d. each.] separate suction pump is rendered unnecessary. Deutsche Normen in Fremdsprachen. [Deutscher Nor- menausschuss, Berlin W15, Uhlandstrasse 175. No price quoted.] 730,147. Blades for centrifugal compressors, etc. Maschinenfabrik Oerliken. Application in Switzer­ The Services and Your Career. [Ministry of Labour land, August 28, 1952. and National Service.] The airflow over a blade 1 for a centrifugal com­ Better Ways. Nineteen Paths to Higher Productivity. pressor, fan, etc., is improved by providing apertures [British Productivity Council. 2s. 6d.] November 1955 389 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Month in the Patent Office

Aircraft Engineering and Aerospace Technology , Volume 27 (11): 1 – Nov 1, 1955

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb032629
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Abstract

arrangement according to FIG. 4a the direction of the jet is controlled by two sets of pivoted vanes 27, 28, one set closing the nozzle while the other permits free flow. These abstracts of British Patent Specifications are condensed, by permission, from the official 730,818. Launching carriages. Vickers-Armstrongs Ltd. Application, March 3, 1953. specifications. Copies of the full specifications are obtainable from the Patent Office, 25 Southampton A launching carriage is steered by the pilot of the Buildings, W.C.2, price 3s. each. aircraft, without the provision of any steering control link between the aircraft cockpit and the carriage, by so arranging the carriage wheel axles that the applica­ tion of a rolling moment to the aircraft results in the carriage being steered in the same direction as that in 729,573. Pressure-tight seals. A. V. Roe Canada which the aircraft would turn in free flight under the Ltd. Application, June 17, 1952. moment. For this purpose either or both of the carri­ A seal for the canopy 13 of a pressurized cockpit age axles 11, 12 are connected to the carriage body consists of an inflatable tube 23 disposed in a channel 10 by shafts 17, 18 lying in the fore-and-aft plane of 20a secured to the cockpit framing and having wall symmetry but slightly inclined to the horizontal so portions 21, 22, the arrangement being such that when that if, as shown in FIG. 5, a moment is applied to the inflated the tube bears against the wall 21 and forces aircraft 15 tending to roll it and the carriage 10 to a blade member 24a attached to the canopy into starboard, the axles 11, 12 are caused to pivot about scaling contact with the wall 22. The latter is of the shafts 17, 18 so that they converge to a point on curved cross-section to provide a convex sealing sur­ the starboard side and thus cause the carriage to face, while a tube-retaining flange 21a is formed at turn in that direction. Return springs may be attached the tip of the wall 21. Expansion of the plastic canopy to the shafts 17, 18 to make the carriage return auto­ matically to a straight path when the applied rolling moment ceases. The aircraft is supported on a pillar 14 with freedom to align itself with the relative wind during the take-off run. panel 13 relatively to the framing 126 results only in movement along the surface of the blade 24a, in 8 in the trailing edge 5, and further apertures 6, 7 in which direction the blade is subject only to frictional the upper and lower surfaces 3, 4 at the beginning of constraint in the co-acting channel. When the tube 23 the break-away zones, so that under the centrifugal is deflected the clearance between it and the blade head set up when the blade is operating the boundary 24a allows the canopy to be opened without causing layer over the leading edge portion is drawn through rubbing between the tube and blade. the apertures 6, 7 into the interior of the blade and discharged through the apertures 8, thus preventing turbulence over the trailing edge. In certain cases it 730,009. Boundary layer control in ducts for fluid may be sufficient to provide apertures in cither the flow. Fairey Aviation Co. Ltd. Application, January upper or lower surface, not both. 2, 1952. Turbulence in a bend in a duct is avoided by with­ drawing the boundary layer at the inside and outside 730,585. Jet deflectors. Power Jets (Research and Development). Application, May 30, 1952. In an arrangement for deflecting a propulsive jet downwardly to reduce the landing speed of an aircraft the axis of the downwardly projecting nozzle is arranged to pass through or near a transverse line through the centre of gravity of the machine. If several such nozzles are provided they are arranged so that the resultant line of thrust satisfies this con­ dition. A number of jet deflectors are described, that shown in FIG. 4c consisting of a hinged plate 8a with side pieces 86, that in FIG. 4b of a slidable box member 18, and that in FIG. 4d of a rotary valve 38. In the surfaces of the bend and then returning it to the main stream at a downstream point. In the arrangement BOOKS RECEIVED shown porous panels F, G are fitted at the bend in a duct A and a venturi section H formed in the duct Mechanical Engineering Research 1954. Department downstream of the bend, the portion of the duct ex­ of Scientific and Industrial Research. [H.M. tending from the bend to downstream of the venturi Stationery Office. 3s.] being surrounded by a jacket J forming an annular Standardization—An Aid to Productivity. Action space between it and the duct. The venturi throat N is Pamphlet No. 4. [British Productivity Council. 9d.] perforated, so that when fluid is flowing the boundary layer is sucked through the panels F, G and the per­ Timbers of South-East Asia. Gerald Hart. [Timber forations in the throat N, from which it returns to the Development Association Ltd., 21 College Hill, main stream. When only a small flow is involved the E.C.4. Free of charge from the Association.] jacket J may be replaced by a number of separate Standards in Industry (Planning No. 381); The British tubes, each fitted with a throttling device to control Standards Institution (Planning No. 382). [Political the rate of flow. Since the arrangement operates auto­ and Economic Planning, 16 Queen Anne's Gate, matically whenever fluid is flowing, the fitting of a S.W.1. 2s. 6d. each.] separate suction pump is rendered unnecessary. Deutsche Normen in Fremdsprachen. [Deutscher Nor- menausschuss, Berlin W15, Uhlandstrasse 175. No price quoted.] 730,147. Blades for centrifugal compressors, etc. Maschinenfabrik Oerliken. Application in Switzer­ The Services and Your Career. [Ministry of Labour land, August 28, 1952. and National Service.] The airflow over a blade 1 for a centrifugal com­ Better Ways. Nineteen Paths to Higher Productivity. pressor, fan, etc., is improved by providing apertures [British Productivity Council. 2s. 6d.] November 1955 389

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Nov 1, 1955

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