(19)

(11)

EP 1 345 803 A1

(12)

(43) Date of publication: 24.09.2003 Bulletin 2003/39 (21) Application number: 01271302.0 (22) Date of filing: 17.12.2001

(51) International Patent Classification (IPC)7: B61L 5/04, B61L 5/06, B61L 5/10 (86) International application number: PCT/GB0105/557 (87) International publication number: WO 0204/9902 (27.06.2002 Gazette 2002/26)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 19.12.2000 GB 0031023 24.01.2001 GB 0102061 (71) Applicant: General Signal UK Limited Stockport SK12 1LH,Cheshire (GB)	(72) Inventor: DAVIES, Anthony Roger Cirencester,Gloucestershire GL7 2NF (GB) (74) Representative: Lamb, John Baxter  MARKS & CLERK,57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)