Junction box suspension unit for suspended ceilings

Claim 1

In combination, an openwork grid-type suspended ceiling frame structure embodying a pair of spaced interconnected parallel coplanar inverted T-irons, an adapter unit designed and adapted to bridge the space between coacting portions of the respective T-irons, said adapter unit comprising a single length of strap iron embodying an elongated flat-faced body portion and correspondingly constructed integral end portions, each end portion having a terminal downwardly opening strap-iron attaching hook removably hooked over a vertical flange portion of the respectively cooperable T-iron, each hook having inner and outer legs joined at upper ends by a connecting bight portion, said bight portion being in a plane with the plane of said body portion, the outer leg providing a depending bill portion, said bill portion being provided with a readily accessible setscrew which is clampingly engaged with a coacting surface of the coordinating flange portion of the oriented T-iron, that part of each end portion at the juncture of the inner leg and body portion being formed with an integral L-shaped portion providing a ceiling panel engaging and holddown bend, said bend having a horizontal part which is disposed at right angles to the adjacent inner leg of the cooperatively adjacent hook and is thus adapted to rest firmly and retentively atop a coacting surface of a ceiling panel, a junction box for electric lighting fixtures and appliances, and clip means for slidably and adjustably mounting said junction box, on said strap iron.