Patents Assigned to Jack B. Hirschmann
  • Combined smoke detection and furnace shut off device
    Patent number: 4171944
    Abstract: A combined smoke detection and furnace shut-off device is provided having a smoke detection means which is disposable adjacent a furnace for detecting the presence of smoke unnaturally emitted from the furnace, a means for stopping ignition within the furnace, and means responsive to detection of the smoke by said smoke detection means for activating the ignition stopping means.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: October 23, 1979
    Assignee: Jack B. Hirschmann
    Inventor: Jack B. Hirschmann