Underfloor boxes

Claim 2

The combination of a junction box and an adapter for a twolevel underfloor duct system: a hollow body formed with a pair of rectangularly shaped upper openings and a pair of rectangularly shaped lower openings, the openings being of identical cross-sectional size and the upper openings being for use in receiving, alternatively, underfloor ducts of the upper level ducts of the system or a duct adapter and the lower opening being for use in receiving, alternatively, underfloor ducts of the lower level ducts of the system or a duct adapter; at each opening, a pair of spaced-apart threaded apertures formed in the body and being in communication with the opening and set screws respectively in the apertures, a screw, when turned down, extending into the opening; and an adapter having an open-ended socket and a barrier adjacent the socket, the adapter being rectangular in shape and said socket being off-center with respect to the horizontal center of said rectangular shape to permit said adapter to fit into any of said openings in reversible positions so that in one position the socket is on the left hand side of the openings and in the reverse position the socket is on the right hand side of the openings, the socket being for use in receiving an underfloor duct of smaller size than the size of the duct fitting into the opening without the adapter and the barrier being for use in closing off the unused part of the opening.

Claim 3

A junction box for a two-level underfloor duct system comprising: a hollow upper body having a top wall and a pair of side walls, the top wall having an opening to provide access to the interior of the box and the top and side walls forming an upper channel; a hollow lower body disposed beneath the upper body, the lower body having a bottom wall and a pair of side walls, the bottom and side walls forming a lower channel extending substantially at 90* to the upper channel; a pair of upper flanges respectively connected with and extending outwardly from the bottom of the upper body side walls, the flanges respectively extending across the lower channel at opposite ends thereof; at each end of the lower channel the bottom wall of the lower body, the side walls of the lower body and an upper flange forming an opening, the openings being identical in size and being for use in receiving, alternatively, an underfloor duct of the upper level ducts of the system or receiving a duct adapter; a pair of lower flanges respectively connected with and extending outwardly from the top of the lower body side-walls, the lower flanges respectively extending across opposite ends of the upper channel and the opposite ends of the lower flanges respectively engaging opposite ends of the upper flanges; at each end of the upper channel the top wall of the upper body, the side walls of the upper body and a lower flange forming an opening, each opening being the same size as the lower openings and being for use in receiving, alternatively, an underfloor duct of the lower level ducts of the system or receiving a duct adapter; at each opening, a pair of spaced-apart threaded apertures formed in the body and being in communication with the opening and set screws respectively in the apertures, a screw, when turned down, extending into the opening; an adapter having an open-ended socket and a barrier adjacent the socket, the adapter being rectangular in shape and said socket being off-center with respect to the horizontal center of said rectangular shape to permit said adapter to fit into any of said openings in reversible positions so that in one position the socket is on the left hand side of the openings and in the reverse position the socket is on the right hand side of the openings, the socket being for use in receiving an underfloor duct of smaller size than the size of the duct fitting into the opening without the adapter and the barrier being for use in closing off the unused part of the opening and the socket having cut-out sections to accommodate said set screws whereby the same contacts a duct in the socket to ground the same; a plurality of aligned apertures respectively formed in the engaged sections of the upper and lower flanges; a plurality of fasteners respectively extending through the aligned apertures, each fastener having means for holding the upper and lower flanges in tight engagement and further having means supporting a leveling lug for use in adjusting the box in the vertical direction; and a plurality of leveling lugs respectively mounted in last said means.

Claim 4

A junction box for a two-level underfloor duct system comprising: a hollow upper body having a top wall and a pair of side walls, the top wall having an opening to provide access to the interior of the box and the top and side walls forming an upper channel; a hollow lower body disposed beneath the upper body, the lower body having a bottom wall and a pair of side walls, the bottom and side walls forming a lower channel extending substantially at 90* to the upper channel; a pair of upper flanges respectively connected with and extending outwardly from the bottom of the upper body side walls, the flanges respectively extending across the lower channel at opposite ends thereof; at each end of the lower channel the bottom wall of the lower body, the side walls of the lower body and an upper flange forming an opening, the openings being identical in size and being for use in receiving, alternatively, an underfloor duct of the upper level ducts of the system or receiving a duct adapter; a pair of lower flanges respectively connected with and extending outwardly from the top of the lower body side-walls, the lower flanges respectively extending across opposite ends of the upper channel and the opposite ends of the lower flanges respectively engaging opposite ends of the upper flanges; at each end of the upper channel the top wall of the upper body, the side walls of the upper body and a lower flange forming an opening, each opening being the same size as the lower openings and being for use in receiving, alternatively, an underfloor duct of the lower level ducts of the system or receiving a duct adapter; at each opening, a pair of spaced-apart threaded apertures formed in the body and being in communication with the opening and set screws respectively in the apertures, a screw, when turned down, extending into the opening; an adapter having an open-ended socket and a barrier adjacent the socket, the adapter being rectangular in shape and said socket being off-center with respect to the horizontal center of said rectangular shape to permit said adapter to fit into any of said openings in reversible positions so that in one position the socket is on the left hand side of the openings and in the reverse position the socket is on the right hand side of the openings, the socket being for use in receiving an underfloor duct of smaller size than the size of the duct fitting into the opening without the adapter and the barrier being for use in closing off the unused part of the opening and the socket having cut-out sections to accommodate said set screws whereby the same contacts a duct in the socket to ground the same; a plurality of aligned apertures respectively formed in the engaged sections of the upper and lower flanges; a plurality of fasteners respectively extending through the aligned apertures, each fastener having means for holding the upper and lower flanges in tight engagement and further having means supporting a leveling lug for use in adjusting the box in the vertical direction; and a plurality of leveling lugs respectively mounted in last said means.