Patents Assigned to C & K Systems, Co.
  • Intrusion detection system having improved immunity to false alarm
    Patent number: 5107249
    Abstract: A multi-sensor intrusion detection system having improved immunity to false alarm is disclosed. The sensor being less susceptible to the generation of false alarm has its output signal processed and held. The held signal is supplied to a logic gate which receives directly the signal from the other sensor. The output of the logic gate generates an alarm signal.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: April 21, 1992
    Assignee: C & K Systems, Co.
    Inventor: Richard A. Johnson