Patents by Inventor Stefan Temperli

Stefan Temperli 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).

  • Circuit arrangement for monitoring noise levels of detectors arranged in an alarm installation
    Patent number: 4598271
    Abstract: The circuit arrangement generating at least one noise-level warning threshold monitors the noise-level of detectors in an alarm system. The noise-level warning threshold assumes a fixed relation to the operating or working point level of the signal transmitted by the detector of the alarm system while taking into account shifts in the level of the operating or working point. An alarm storage or buffer disposed in the detector is set without transmitting an alarm signal when the noise-level warning threshold has been exceeded. The noise-level is monitored during normal operation and gives sufficiently early warning of a tendency to generate false alarms.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: July 1, 1986
    Assignee: Cerberus AG
    Inventors: Peter Wagli, Stefan Temperli