Patents by Inventor Robin P. E. Gutmann

Robin P. E. Gutmann 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).

  • Smoke or fire detector
    Patent number: 4617560
    Abstract: This invention is a smoke or fire detector that first utilizes a signal that is indicative of a detected smoke or fire condition to operate an air moving device to purge the detectors photocell or ionization chamber and to thereafter allow an additional signal indicative of a detected smoke or fire condition within a predetermined time frame to provide an alarm signal. The smoke or fire detector avoids many false alarm situations by placing a cyclic purge switching control system between the smoke or fire detector and the alarm signal device. The cyclic purge switching control system sequentially connects the signal indicative of a detected smoke or fire condition between the air moving device such as a fan and the alarm signal device.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: October 14, 1986
    Inventor: Robin P. E. Gutmann