US3977138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space enclosure
Assignee: Individual
•
Filing: 1975-04-16
•
Granted: 1976-08-31
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Expires: 1995-04-16
Abstract
Abstract Space enclosures fabricated of relatively inflexible material, critically formed into a three dimensional shape which approximates to some degree the dome construction of common architectural form. Each of the enclosures representing the several embodiments of invention is comprised of a plurality of pieces, fabricated from material which not only has rigidity but sufficient thickness that must be taken into account at the juncture of adjoining pieces by determining the dihedral angles formed by the intersecting planes of their inside surfaces. This allows for the proper beveling of the edges of the construction members to establish the total angle at each intersection. The pieces, or construction members are actually planar members most of which are in triangular form. According to the invention, both the dihedral angles and the linear dimensions of the members are more easily calculated if the triangular construction members are restricted to an isosceles shape. Each edge of the construction members is tangent to the surface of an imaginary spherical shape at some predetermined point intermediate its terminal points, the sphere having the same center as the actual enclosure to be constructed. The building design according to the invention allows for a great variety of shapes and appearances, each of which may be considered as a separate embodiment of the claimed invention.
Inventors
- 👤 Lemuel J. Chastain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:48
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/107; E04B1/00; E04B1/32; E04B1/3211; E04B2001/327; E04B2001/3294; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A domelike space enclosure comprised of a plurality of polygonal planar panel members having at least one non-regular polygon and at least one other shaped polygon which is not the mirror image of the nonregular polygon, each of said panel members having a base side and at least two other sides, said panel members being adapted for assembly concentrically spaced about and approximating a spherical surface, said panel members being positioned for tangential intersection with said spherical surface at an intermediate point along each of the base and other sides of the respective panel members, said intermediate points defining an inscribed circle within each polygonal panel member with said circle being coincident with the spherical surface, each of said respective panel members having a thickness dimension with an edge thickness along the base side and other sides thereof being bevelled to provide companion mating edge surfaces between contiguous panels and forming a dihedral angle between said panels, said mating edge surfaces being coincident with a great circle plane passing through said spherical surface and tangent to the inscribed circle at said intermediate points whereby the linear dimensions of the sides and the dihedral angle between adjacent panel members are determinable for accurate interfitting between adjacent panel members thus effecting a weathertight seal and maximum structural rigidity.
Claim 2
Dependent Claim
216 words
A domelike space enclosure comprised of a plurality of polygonal planar panel members having at least one non-regular polygon and at least one other shaped polygon which is not the mirror image of the nonregular polygon, each of said panel members having a base side and at least two other sides, said panel members being adapted for assembly concentrically spaced about and approximating a spherical surface, said panel members being positioned for tangential intersection with said spherical surface at an intermediate point along each of the base and other sides of the respective panel members, said intermediate points defining an inscribed circle within each polygonal panel member with said circle being coincident with the spherical surface, each of said respective panel members having a thickness dimension with an edge thickness along the base side and other sides thereof being bevelled to provide companion mating edge surfaces between contiguous panels and forming a dihedral angle between said panels, said mating edge surfaces being coincident with a great circle plane passing through said spherical surface and tangent to the inscribed circle at said intermediate points whereby the linear dimensions of the sides and the dihedral angle between adjacent panel members are determinable for accurate interfitting between adjacent panel members thus effecting a weathertight seal and maximum structural rigidity.
Claim 3
Dependent Claim
45 words
A domelike space enclosure as claimed in claim 1 wherein the polygonal panel members are triangular in shape having two sides of equivalent linear dimension and a base side of a different linear dimension with the spherical surface intersecting the base side at its midpoint.
Claim 4
Dependent Claim
45 words
A domelike space enclosure as claimed in claim 2 wherein the polygonal panel members are in the shape of an isosceles triangle with the spherical surface intersecting each of the equivalent linear dimension sides at a point dividing said sides into two unequal length segments.
Claim 5
Dependent Claim
27 words
A domelike space enclosure as claimed in claim 1 wherein the base side edge surface and all other side edge surfaces define bevel angles of equal magnitude.
Claim 6
Dependent Claim
43 words
A domelike space enclosure as claimed in claim 1 including a regular polygonal panel member wherein the base side and all other sides are of equivalent linear dimension and each of the respective side edge surfaces defines a bevel angle of equal magnitude.
Claim 7
Dependent Claim
34 words
A domelike space enclosure as claimed in claim 1 wherein the planar panel members are comprised of scalene triangles with each of the respective side edge surfaces defining a bevel angle of equal magnitude.
Claim 8
Dependent Claim
100 words
A domelike space enclosure as claimed in claim 1 wherein a bevel angle is defined as the complement of the angle formed within a right triangle between one leg defined by the radius of said spherical surface extending through the center of said inscribed circle and being perpendicular to the planar panel member at said point of intersection with the panel member, and the hypotenuse defined by another radius lying within the said great circle plane being coincident with the bevel surface and extending to the intermediate intersection point between a side of said panel member and said spherical surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |