Patents by Inventor Jack B. Hirschmann

Jack B. Hirschmann 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).

  • 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