Patents by Inventor James O. C. Bean

James O. C. Bean 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 alarm cable supervision system
    Patent number: 4032916
    Abstract: A cable supervision system especially adapted for use in an intrusion alarm installation and which is capable of monitoring at a central control unit all lines of an interconnection cable for proper signal levels and balance. Under intended cable signal conditions a predetermined sensible impedance is provided which is monitored at the control unit. A monitoring circuit is coupled to the end of a system cable remote from the control unit, this circuit being operative to monitor the signal conditions of all lines of the cable. In response to proper signal conditions on the cable as determined by this monitoring circuit a predetermined impedance is provided which is sensed at the control unit to detect a change in impedance which would signal a tamper or cable failure alarm.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: June 28, 1977
    Assignee: American District Telegraph Company
    Inventors: Aaron A. Galvin, James B. Edson, James O. C. Bean