(19)

(11)

EP 0 907 897 A1

(12)

(43) Date of publication: 14.04.1999 Bulletin 1999/15 (21) Application number: 97927307.0 (22) Date of filing: 24.06.1997

(51) International Patent Classification (IPC):  G01T 1/ 29( . ) (86) International application number: PCT/GB1997/001707 (87) International publication number: WO 1997/050006 (31.12.1997 Gazette 1998/05)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 24.06.1996 GB 19960013196 (71) Applicant: Fox, Francis Joseph Clarkston, Glasgow G76 7LQ (GB)	(72) Inventor: Fox, Francis Joseph Clarkston, Glasgow G76 7LQ (GB) (74) Representative: Ede, Eric  Fitzpatricks, 4 West Regent Street Glasgow G2 1RS, Scotland Glasgow G2 1RS, Scotland (GB)