GB810249A - Improvements in or relating to apertured structures with double curvature - Google Patents

Improvements in or relating to apertured structures with double curvature

Info

Publication number
GB810249A
GB810249A GB3315156A GB3315156A GB810249A GB 810249 A GB810249 A GB 810249A GB 3315156 A GB3315156 A GB 3315156A GB 3315156 A GB3315156 A GB 3315156A GB 810249 A GB810249 A GB 810249A
Authority
GB
United Kingdom
Prior art keywords
elements
apertures
aperture
arcs
circles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3315156A
Inventor
Arthur Alec Cecil Barnett
Christopher Albert Waller
Timothy Eliot Ely
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Decca Record Co Ltd
Original Assignee
Decca Record Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Decca Record Co Ltd filed Critical Decca Record Co Ltd
Priority to GB3315156A priority Critical patent/GB810249A/en
Publication of GB810249A publication Critical patent/GB810249A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Braking Arrangements (AREA)
  • Tires In General (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

810,249. Metal sheeting. DECCA RECORD CO. Ltd. July 17, 1957 [Oct. 30, 1956], No. 33151/56. Class 20(2) [Also in Group XL(c)] A perforated metal plate formed so that it can be readily shaped into a surface of double cuvature has apertures arranged to form a reticulated structure with an even number of strip-like elements, alternately concave and convex is shape, surrounding each aperture. In the embodiment of Fig. 1 the apertures are regularly arranged and each is surrouned by six elements lying along circular arcs. Considering aperture 10 the elements 15, 17 and 19 lie along 60 degrees arcs of the same circle whilst the elements 14, 16, and 18 are similar but lie along the arcs of circles centred in adjacent apertures. The centres of the circles are at the intersections of three sets of parallel equally spaced lines intersecting at 120 degrees. In another embodiment (Fig. 2) the elements that enclose the extremities of the apertures are also circular and form parts of circles whose centres lie at the apices of an equilateral triangle within the aperture.
GB3315156A 1956-10-30 1956-10-30 Improvements in or relating to apertured structures with double curvature Expired GB810249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3315156A GB810249A (en) 1956-10-30 1956-10-30 Improvements in or relating to apertured structures with double curvature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3315156A GB810249A (en) 1956-10-30 1956-10-30 Improvements in or relating to apertured structures with double curvature

Publications (1)

Publication Number Publication Date
GB810249A true GB810249A (en) 1959-03-11

Family

ID=10349207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3315156A Expired GB810249A (en) 1956-10-30 1956-10-30 Improvements in or relating to apertured structures with double curvature

Country Status (1)

Country Link
GB (1) GB810249A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038040A (en) * 1974-10-05 1977-07-26 Messerschmitt-Bolkow-Blohm Gmbh Flexible lattice-like grid structure etched from a metallic foil
DE3709053A1 (en) * 1986-03-19 1987-10-01 Hitachi Ltd PARABOLIC ANTENNA SHELL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038040A (en) * 1974-10-05 1977-07-26 Messerschmitt-Bolkow-Blohm Gmbh Flexible lattice-like grid structure etched from a metallic foil
DE3709053A1 (en) * 1986-03-19 1987-10-01 Hitachi Ltd PARABOLIC ANTENNA SHELL
US4916459A (en) * 1986-03-19 1990-04-10 Hitachi, Ltd. Parabolic antenna dish

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