Patents by Inventor Lance Weston

Lance Weston 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).

  • Audible alarm apparatus particularly adaptable for use with fire and theft security systems
    Patent number: 4100543
    Abstract: The alarms circuit provides a first signal indicative of a fire alarm and a second signal indicative of another intrusion such as a burglary. The circuit includes a high frequency RC oscillator which undesireably possesses a duty cycle different from fifty percent. The oscillator output is divided by a bistable multivibrator to produce at an output, a divided signal having a fifty percent duty cycle for application to a loud speaker to energize the same efficiently due to the proper duty cycle. In a burglary mode, the oscillator frequency is modulated by a sawtooth developed by a second bistable multivibrator to provide a wailing tone signal indicative of a burglary. This signal is also divided to produce a proper duty cycle signal for application to the loud speaker.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: July 11, 1978
    Assignee: Napco Security Systems, Inc.
    Inventors: Roy Stockdale, Lance Weston