US Patent:
20080012705, Jan 17, 2008
Inventors:
Allan Outzs - Mountain View CA, US
Assignee:
OSI Security Devices - Chula Vista CA
International Classification:
G08B 13/08
Abstract:
A door position monitoring mechanism mounted in the edge of a door that senses whether a door is opened or closed by sensing the absence or presence of a magnetic field of a magnet that is mounted in the door frame. Information regarding the door position is then transmitted to a battery operated wireless access control system mounted on the same door through wires extending from the door position monitoring mechanism.