(19)

(11)

EP 1 004 095 A1

(12)

(43) Date of publication: 31.05.2000 Bulletin 2000/22 (21) Application number: 98937672.8 (22) Date of filing: 05.08.1998

(51) International Patent Classification (IPC)7: G07B 15/02 (86) International application number: PCT/GB9802/355 (87) International publication number: WO 9909/524 (25.02.1999 Gazette 1999/08)

(84) Designated Contracting States: AT BE CH 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: 13.08.1997 GB 9717049 (71) Applicant: Transmo Limited Royston,Hertfordshire SG8 5DY (GB)	(72) Inventors: STANFORD, Christopher, John Harpenden,Hertfordshire AL5 3BW (GB) BAILEY, David, John Purton,Wiltshire SN5 9HH (GB) (74) Representative: Nash, Keith Wilfrid  Pearl Assurance House90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)