(19)

(11)

EP 1 114 412 A1

(12)

(43) Date of publication: 11.07.2001 Bulletin 2001/28 (21) Application number: 99946357.3 (22) Date of filing: 15.09.1999

(51) International Patent Classification (IPC)7: G10K 11/34 (86) International application number: PCT/GB9903/075 (87) International publication number: WO 0016/308 (23.03.2000 Gazette 2000/12)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 15.09.1998 GB 9819973 (71) Applicant: THE SECRETARY OF STATE FOR DEFENCE Farnborough,Hampshire GU14 6TD (GB)	(72) Inventor: JONES, Keith John Dorchester,Dorset DT2 8XJ (GB) (74) Representative: Goddard, David John et al HARRISON GODDARD FOOTEOrlando House11c Compstall Road Marple Bridge Stockport SK6 5HH Stockport SK6 5HH (GB)