Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Three-dimensional space-defining
Patent
1984-12-18
1986-11-25
Ridgill, Jr., James L.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Three-dimensional space-defining
403172, E04H 1218
Patent
active
046240900
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a node element and a framework bar for tridimensional frameworks.
A node element having a pair of parallel, plate-like parts for each framework bar to be connected thereto, and a framework bar designed at its ends to be flat, fitting between one of the pairs of plate-like parts, are conventional. For assembly, the flat bar ends are introduced respectively between one of the pairs of plate-like parts and clamped in place between these parts by means of a screw or rivet (DOS No. 1,609,538). The manufacture of this node element, as well as the assembly of tridimensional frameworks with such node elements and framework bars is expensive. Besides, this node element falls short from satisfying the esthetic wishes of architects.
The invention, as characterized in the claims, solves the problem of providing a simple to manufacture node element and a framework bar adapted thereto, the assembly of which requires less time and the arrangement of which can very extensively meet any esthetic desires.
The invention will be described in greater detail below with reference to the drawing which shows only two embodiments. In the drawing:
FIG. 1 is a top view of a framework node,
FIG. 2 shows a section along line II--II in FIG. 1,
FIG. 3 shows a top view of another embodiment of a framework node,
FIG. 4 shows a section along line IV--IV in FIG. 3,
FIGS. 5 and 6 each shows a modification of FIGS. 2 and 4, and
FIG. 7 shows a section along line VII--VII in FIG. 5 through the framework bar end.
According to FIGS. 1 and 2, a spherical node element body is composed of two parts 1 and 2 held together on a common axis 40 by a screw 3. Part 1 has the shape of a hemisphere 4 with extensions 5 formed thereat with mutual spacings; these extensions are parts of spherical wegdes cut off at an angle .alpha. of 45.degree. with respect to the axis 40 of the sphere. In FIG. 2, the demarcation between the hemispherical shape and one of the extensions 5 is illustrated by a dotted line 7. The other part 2 has the form of a section of a sphere (spherical segment) 8 with integrally formed extensions 9 extending in between the extensions 5 and likewise constituting portions of spherical wedges. In FIG. 2, the demarcation between the spherical segment form and one of the extensions 9 is indicated by a dotted line 10.
The end face 13 of each extension 9, at the bottom in FIG. 2, and one of the surface 14 extending at the hemispherical base 7 between two extensions 5 form a pair of mutually adjoining and/or proximate (see below) boundary surfaces of parts 1 and 2. The end face 15 of each extension 5, at the top in FIG. 2, and one of the surfaces 16 extending at the shell 10 of the spherical section form 8 between two extensions 9 form additional pairs of mutually adjoining and/or proximate (see below) boundary surfaces. Furthermore, the wedge surfaces (lateral surfaces) 18 of proximate extensions 5 and 9 are in contact with each other. A cavity 20 and 21, respectively, oriented toward the center 6 of the sphere and open at the spherical surface, is formed at each of these two boundary surface pairs 13, 14 and 15, 16, alternating with each other in the peripheral direction (based on the axial line 40 of the screw 3); in this cavity, an extension 23 of a framework bar 24 is accommodated and held therein by a force-derived connection or, according to FIGS. 5 or 6, in a shape-mating and, respectively, a force-derived and shape-mating connection. In order to form these cavities 20 and 21, respectively one, or both, of the boundary surfaces can be provided with an indentation. The cavities can extend, in the peripheral direction (based on the axial line 40 of the screw 3) up to the wedge surfaces 18, so that the surfaces 13, 14 and 15, 16, respectively, of the boundary surface pairs are not in contact with each other, or are in contact only between the inner end of the cavity 20 or 21 and the bore provided for the screw 3 and are otherwise proximate to each other. In the illustrated embodiment, the extension 23 of the framework bar
REFERENCES:
patent: 3333375 (1967-08-01), Johnston
patent: 4355918 (1982-10-01), Van Vliet
Ridgill, Jr. James L.
Trohler Paul
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