Abstract: A portable transmitter unit for an emergency response system is provided with a receiver to detect, decode and dynamically store location codes transmitted by strategically placed high frequency AM transmitters. The location code is attached to the stored identity code assigned each portable unit. The combined code is transmitted via a radio signal to an emergency response station upon activation of a switch on the unit by a user requiring assistance.
Type:
Grant
Filed:
May 21, 1997
Date of Patent:
February 29, 2000
Assignee:
Elcombe Systems Limited
Inventors:
Robert K. Webster, Andre J. Danis, J. Raymond Whitbread, Real Dufour