(19)

(11)

EP 2 232 454 A1

(12)

(43) Date of publication: 29.09.2010 Bulletin 2010/39 (21) Application number: 08866536.9 (22) Date of filing: 23.12.2008

(51) International Patent Classification (IPC):  G08B 23/00(2006.01) (86) International application number: PCT/US2008/088253 (87) International publication number: WO 2009/086432 (09.07.2009 Gazette 2009/28)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 26.12.2007 US 9096 (71) Applicant: Elster Electricity, LLC. Raleigh, NC 27610 (US)	(72) Inventor: MURPHY, Michael, A. Raleigh NC 27615 (US) (74) Representative: Small, Gary James  Carpmaels & Ransford One Southampton Row London WC1B 5HA London WC1B 5HA (GB)