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US 4,378,561 AGranted
Parabolic reflector antenna
OwnerRobert J. Hibbard, Carl V. Seibert, IIIinventors
Life of this patent
Estimating the term…
Abstract
A parabolic electromagnetic wave reflector is formed of glued together identical sectors of foam plastic, each with a parabolic curve formed by the upper side, and each with joint elements which serve also as stiffening ribs along their radial edges. A reflective surface is applied to the concave sides of the sectors. When the sectors are joined, they combine to form a parabolic dish.
Claims4
A parabolic reflector comprised of a plurality of similar sectors of foam plastic,
- each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex,
- joint means along radial edges of said sectors for joining the same together to form a dish-shape body,
- a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof,
- and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy, said ribs being along radial edges of said sectors.
1 more element
A parabolic reflector comprised of a plurality of similar sectors of foam plastic,
- each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex,
- joint means along radial edges of said sectors for joining the same together to form a dish-shape body,
- a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof,
- and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy,
- the stiffening rib on each of said sectors having adjacent the apex thereof an upstanding end for joining with the upstanding rib ends of the other sectors to provide a unitary column at the center of the body.
2 more elements
Dependencies are inferred from the claim text.