Patents by Inventor Hoffman Sit

Hoffman Sit has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4302798
    Abstract: A pan for a ceiling mounted light fixture includes a saucer-like canopy defining a mounting hole for receipt of a fastener to secure the light fixture to a ceiling support surface. A first layer of insulative material is received between the canopy and the ceiling surface. Descending arms spaced about the periphery of the canopy join the canopy to a housing portion which is suspended therefrom. The housing portion includes concentric outer and inner walls, the latter of which has an inwardly extending lip or ledge defining a shelf to support a second layer of insulative material disposed between the canopy and shelf. Electrical sockets for receiving incandescent lamps are mounted on the lower wall of the shelf and a glass or the like shade is received thereover and secured by screws extending through the outer wall of the housing portion. The double layers of insulative material serve as barriers to prevent damage to the ceiling surface from heat generated by the incandescent lamps of the light fixture.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: November 24, 1981
    Assignee: McGraw-Edison Company
    Inventor: Hoffman Sit