Patents by Inventor Lawrence Tracy

Lawrence Tracy 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).

  • Intrusion detector test circuit which automatically disables a detected-event indicator
    Patent number: 5499012
    Abstract: An intrusion detector test circuit automatically disables a detected-event indicator from receiving sensing signals. A sensor generates a sensing signal in response to a detection of an installer testing the intrusion detector. An indictor means receives the sensing signals and generates detected-event indications in response to the sensing signals. A switch interposed between the sensor and the indicator receives the sensing signals. In a first state, the switch supplies the sensing signals to the indicator; in a second state, the switch means does not supply the sensing signals to the indicator. A first state setter sets the switch to the first state, and a second state setter automatically sets the switch to the second state after a lapse of a predetermined time period.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: March 12, 1996
    Assignee: C & K Systems, Inc.
    Inventors: Lawrence Tracy, Dale Dorando, Frederick Eggers