(19)

(11)

EP 0 659 293 A1

(12)

(43) Date of publication: 28.06.1995 Bulletin 1995/26 (21) Application number: 93919531.0 (22) Date of filing: 13.09.1993

(51) International Patent Classification (IPC):  G08B 15/ 02( . ) (86) International application number: PCT/GB1993/001935 (87) International publication number: WO 1994/007223 (31.03.1994 Gazette 1994/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GR IE IT LI LU NL PT SE (30) Priority: 12.09.1992 GB 19920019365 04.03.1993 GB 19930004390 (71) Applicant: DARDS, Paul Anton Crownhill, Milton Keynes MK8 0AJ (GB)	(72) Inventor: DARDS, Paul Anton Crownhill, Milton Keynes MK8 0AJ (GB) (74) Representative: Jones, William  Willow Lane House Willow Lane Norwich NR2 1EU Norwich NR2 1EU (GB)