(19)

(11)

EP 1 040 318 A1

(12)

(43) Date of publication: 04.10.2000 Bulletin 2000/40 (21) Application number: 98959063.3 (22) Date of filing: 11.12.1998

(51) International Patent Classification (IPC)7: G01D 5/241, G06K 11/16 (86) International application number: PCT/GB9803/731 (87) International publication number: WO 9932/853 (01.07.1999 Gazette 1999/26)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 18.12.1997 GB 9726640 (71) Applicant: Woodfield, David Alan Bloxwich,Walsall WS3 3RX (GB)	(72) Inventor: Woodfield, David Alan Bloxwich,Walsall WS3 3RX (GB) (74) Representative: Lucking, David John et al FORRESTER & BOEHMERTFranz-Joseph-Strasse 38 80801 München 80801 München (DE)