Intruder Detection Systems for Access Hatches

• US 20090160636A1
• Filed: 12/21/2007
• Published: 06/25/2009
• Est. Priority Date: 12/21/2007
• Status: Abandoned Application

• Current Assignee: Edward Klinger
• Original Assignee: Edward Klinger
• Inventors: Klinger, Edward
• Application Number:
  US11/962,244
• Publication Number:
  US 20090160636A1
• Time in Patent Office: Days
• US Class Current: 340/539.100
• CPC Class Codes: G08B 13/08 by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
• CPC Class Codes: G08B 13/1663 using seismic sensing means
• CPC Class Codes: G08B 13/1672 using sonic detecting means, e.g. a microphone operating in the audio frequency range
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: G08B 29/183 Single detectors using dual technologies G08B13/1672, G08B13/2448, G08B13/2494 take precedence
• CPC Class Codes: G08B 29/185 Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system

Abstract

A wireless alarm system comprising a master unit 6 and multiple slave units 4 that uses the hatch itself as a radio frequency transmission medium for communication and is able to detect and verify attacks on the hatch by forced opening, drilling, cutting, grinding and introduction of liquid contaminant.

Claims

1. An intruder detection system for access hatches comprising a communications antenna design that electro magnetically couples radio frequency power to a metal hatch via a strong magnet.

2. An intruder detection system for access hatches according to claim 1, in which a hardware and software audio sensing algorithm is used to verify attack by drilling, cutting or grinding of a hatch frame or cover.

3. An intruder detection system for access hatches according to claim 1, in which a hardware and software vibration sensing algorithm is used to verify attack by hammering on a hatch frame or cover.