Patents Assigned to Central Security Mfg. Corp.
  • Personnel security system
    Patent number: 4682155
    Abstract: A security sensing system monitors the passage of persons through a door or like opening. A transmitter module having means for transmitting an omnidirectional signal is installed on persons to be monitored and a sensing module for installing adjacent to a door opening to be monitored. The sensing module operates an alarm, but only when the door is opened by a person equipped with a trigger module on his person.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: July 21, 1987
    Assignee: Central Security Mfg. Corp.
    Inventor: John R. Shirley