Patents by Inventor Dale G. Hobson

Dale G. Hobson 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).

  • Apparatus and method for rapidly and reliably sealing off certain exit and entrance ways in response to smoke or fire
    Patent number: 5195594
    Abstract: A method and apparatus for rapidly and reliably sealing off a selected exit way or entrance way from an adjacent path of smoke which comprises providing a reel of fire resistant material and having magnetic edge strips on each side thereof above said exit way or entrance way, and causing the reel to drop in vertical fall adjacent to the exit way or entrance way and simultaneously cause magnetized strips on a fire retardant curtain wound on the reel to become rapidly and magnetically attached to the exit way or entrance way upon the nearby condition of either smoke or fire. This apparatus is elegantly simple and reliable in both its construction and operation and has an extremely high price/performance figure of merit.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: March 23, 1993
    Inventors: Thomas H. Allen, Dale G. Hobson