Patents by Inventor John J. Kunzer

John J. Kunzer 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).

  • Interconnection circuit for a plurality of alarm units
    Patent number: 4207558
    Abstract: Each alarm unit has a sensing circuit which supplies a signal in the presence of a particular problem such as smoke, heat, or equipment failure. The signal energizes an electronic switching device, to couple power to a horn which then produces an alerting tone. The output of the sensing circuit is also coupled by a resistor to electronic switching devices in the other alarm units in the system, so that the occurrence of a problem at one location activates the horn in each alarm unit.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: June 10, 1980
    Assignee: Pittway Corporation
    Inventor: John J. Kunzer