(19)

(11)

EP 1 546 640 A2

(12)

(88) Date of publication A3: 20.01.2005 (43) Date of publication: 29.06.2005 Bulletin 2005/26 (21) Application number: 03811652.1 (22) Date of filing: 06.08.2003

(51) International Patent Classification (IPC)7: F42B 12/58 (86) International application number: PCT/US2003/024557 (87) International publication number: WO 2004/059236 (15.07.2004 Gazette 2004/29)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 29.08.2002 US 406828 P 20.02.2003 US 370892 (71) Applicant: Raytheon Company Waltham,Massachusetts 02451-1449 (US)	(72) Inventor: LLOYD, Richard, M. Melrose, MA 02176 (US) (74) Representative: Jones, Graham Henry  Graham Jones & Company77 Beaconsfield Road Blackheath, London SE3 7LG Blackheath, London SE3 7LG (GB)