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Standing box for electrial fixtures

  • US 3,975,074 A
  • Filed: 04/04/1975
  • Issued: 08/17/1976
  • Est. Priority Date: 04/04/1975
  • Status: Expired due to Term
First Claim
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1. The combination of a standing box unit and a floor box unit and gasket means for sealing both units when the units are connected together, the standing box unit comprising:

  • a housing mounting at least one electrical convenience outlet thereon;

    an electrical plug having a plurality of electrically conductive prongs extending therefrom;

    a hollow stem joined at a first end to the underside of said housing and having a second, open end for housing the plug;

    a circular flange at the second end of said stem extending radially outwardly therefrom and having an outer diameter substantially equal to that of the gasket;

    a passageway common to said first end of said stem and the interior of said housing for allowing passage of wiring connections between the convenience outlet and the plug and insulated wires for electrically connecting said outlet to said plug;

    the underside of said housing including a plurality of openings disposed outwardly of said passageway but encompassed within said stem, a plurality of plug-retaining elements passing axially into said stem through said openings;

    said plug including a plurality of openings axially aligned with the openings in said housing in which said retaining elements are secured, whereby the plug is affixed in said stem to said housing with the prongs of the plug extending along said axis and projecting beyond said flange of said stem;

    an externally-threaded collar loosely mounted on said stem between the underside of the standing box and said flange, said collar having an internal diameter less than the external diameter of said flange;

    the floor box unit including an outwardly-facing receptacle mounted fixedly below the surface of a floor in which the floor box unit is mounted;

    a flat floor plate mounted fixedly to the floor box unit substantially flush with said surface, said floor plate having an internally threaded portion adjacent the upper surface thereof and an annular shoulder portion inwardly of said threaded portion;

    said shoulder portion supporting the gasket thereon;

    the external threads of said collar mating with the internal threads of said floor plate;

    means disposed on a portion of the surface of said collar which projects above the floor surface for facilitating rotation of said collar into said floor plate, whereby rotation of said collar drives said flange axially to compress the gasket with minimum torsional stresses against said shoulder portion of said floor plate and thereby effect a sealed, threaded mounting of the standing box unit to the floor box unit.

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