(19)

(11)

EP 1 492 993 A1

(12)

(43) Date of publication: 05.01.2005 Bulletin 2005/01 (21) Application number: 03715095.0 (22) Date of filing: 24.03.2003

(51) International Patent Classification (IPC)7: G01B 5/25, G01B 7/31, G01B 21/14 (86) International application number: PCT/GB2003/001240 (87) International publication number: WO 2003/081169 (02.10.2003 Gazette 2003/40)

(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: 22.03.2002 GB 0206951 (71) Applicant: Orcam Engineering Limited Stevenston,Ayrshire KA20 3LR (GB)	(72) Inventor: CAMERON, John Dalry,Ayrshire KA24 5BT (GB) (74) Representative: Kennedy, David Anthony  Kennedys Patent Agency Limited,Floor 5,Queens House,29 St Vincent Street Glasgow G1 2DT Glasgow G1 2DT (GB)