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US 4,285,095 AGranted
Channel strut for stage equipment support system
OwnerRichard W. Jansoninventor
Life of this patent
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OwnerRichard W. Jansoninventor
Estimating the term…
A supporting grid system for installation under a stage ceiling which includes a plurality of struts suspended from the stage ceiling. Each strut has a centrally vertically disposed I-beam portion and a pair of spaced-apart upper arms extending upwardly and outwardly from the upper aspect of the central portion and a further pair of spaced-apart lower arms extending downwardly and outwardly from the central portion. Both pairs of arms define cruciform-shaped grooves, such grooves being identical but opposed. The strut is integral and formed from extruded aluminum. It is normally secured in place by hanger rods connected to the ceiling of the stage through support members having a horizontal flange and a support part of cruciform-shaped cross-section to mate with and be received slideably within the cruciform-shaped groove defined at the top of the strut. Similar support members are received in the bottom groove of the strut and are interconnected by further like support members to a curtain rod assembly wherein the curtain rod defines an elongated cruciform groove in its upper portion to receive cruciform-shaped part on the further support member. The struts extend fore and aft relative to the stage whereby the curtain rods extend transversely. Horizontal flanges are provided on each curtain rod's lower portion to receive wheeled curtain carriers. Both the rod and the strut are symmetrical about a vertical axis and the strut is also symmetrical about a horizontal axis. The curtain rod is adapted to receive chain links in its cruciform slot for supporting the rod either as a safety measure or for supplementary support.
A traverse rod support strut in combination with a support member, said strut comprising an upper support portion which defines a cruciform-shaped groove and a lower portion which defines a like cruciform-shaped groove, said strut being symmetrically disposed on either side of a vertically disposed plane parallel to its length and of a horizontally disposed plane parallel to its length and having a substantially uniform cross-section within a further vertical plane perpendicular to the first-mentioned plane, said support member comprising a cruciform-shaped part adapted to mate with and be slidably received in either said groove and a connection part integral with and extending from said cruciform-shaped part parallel to said horizontally disposed plane and closely adjacent the outer surface of said support portion in which it is received, a ceiling above said strut, hanger means depending from said ceiling received by said support member providing support for said strut.
Dependencies are inferred from the claim text.