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Rectangular waveguide bend

  • US 3,072,870 A
  • Filed: 07/21/1960
  • Issued: 01/08/1963
  • Est. Priority Date: 07/21/1960
  • Status: Expired due to Term
First Claim
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1. FOR USE IN EFFECTING AN ABRUPT CHANGE IN THE AXIAL DIRECTION OF A RECTANGULAR WAVEGUIDE, A BENT RECTANGULAR WAVEGUIDE SECTION OF ZERO INSIDE RADIUS HAVING A BENT INTERMEDIATE PORTION, AND STRAIGHT END PORTIONS AXIALLY DISPOSED RELATIVE TO EACH OTHER AT THE DESIRED ANGLE OF SAID CHANGE, EACH END PORTION MEETING SAID INTERMEDIATE BENT PORTION IN A PLANE SUBSTANTIALLY NORMAL TO THE AXIS OF SAID END PORTION, SAID PLANES INTERSECTING EACH OTHER AT A SECOND ANGLE WHICH IS THE TRIGONOMETRIC SUPPLEMENT OF SAID DESIRED ANGLE IN A LINE COMMON TO FIRST WALLS OF EACH END PORTION WHICH MEET SUBSTANTIALLY AT SAID LINE AND CONSTITUTE THE INNER WALL OF SAID BENT WAVEGUIDE SECTION THE OUTER WALL OF SAID INTERMEDIATE PORTION BETWEEN SAID PLANES MATING WITH AND JOINING THE SECOND WALLS OF EACH END PORTION OPPOSITE SAID RESPECTIVE FIRST WALLS AND BEING ARCUATELY CURVED ON A CONSTANT RADIUS CENTERED AT A POINT LYING WITHIN AND ON THE BISECTOR OF THE ANGLE OF SAID INNER WALL, SAID POINT BEING SO LOCATED THAT THE LENGTH OF THE PORTION OF SAID RADIUS BISECTING SAID SECOND ANGLE FROM SAID INNER WALL TO SAID OUTER WALL OF SAID INTERMEDIATE PORTION IS OF THE ORDER OF TEN PERCENT LESS THAN THE DISTANCE BETWEEN SAID FIRST AND SECOND WALLS IN EITHER OF SAID END PORTIONS.

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