Frame for constructing a hemispherical multi-layered shell
AssigneeHahn & Clay
InventorRaymond E. Pechacek
Life of this patent
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Abstract
A plurality of annular plates are machined to have substantially identical outer diameters equal to the inner diameter of the head to be made. A first annular plate is arranged as an annular base plate. The other annular plates are cut into four congruent arc portions of less than 90.degree. and braces are attached to each congruent arc portion. A plurality of the arc portions are mounted by a first end to the upper surface of the annular base plate in a substantially equally, circumferentially spaced arrangement. The second end of each arc portion is fastened to the outer surface of a central collar to form the hemispherical frame.
Claims6
A jig frame for constructing a hemispherical multi-layered shell, comprising:
- an annular ring-shaped base plate with a bottom surface and a top surface;
- a plurality of arc portions cut from an annular ring-shaped plate congruent to said annular ring-shaped base plate and having an outer radius of curvature equal to the outer radius of curvature of said base plate, each with a first end and a second end;
- said plurality of arc portions mounted and detachably secured by said first ends to said upper surface of said base plate equally circumferentially spaced and radially directed;
- and
- said second end of said arc portions being attached to the outer surface of a central collar whereby said arc portions are readily detachable from said base plate after manufacturing said shell on said frame.
Dependencies are inferred from the claim text.