(19)

(11)

EP 0 466 792 A1

(12)

(43) Date of publication: 22.01.1992 Bulletin 1992/04 (21) Application number: 90906279.0 (22) Date of filing: 06.04.1990

(51) International Patent Classification (IPC):  A62B 1/ 20( . ) (86) International application number: PCT/GB1990/000525 (87) International publication number: WO 1990/011799 (18.10.1990 Gazette 1990/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 08.04.1989 GB 19890007962 (71) Applicant: TELESCAPE LIMITED Gorleston, Great Yarmouth Norfolk NR31 7QU (GB)	(72) Inventor: GIBBS, Michael, John Telescape (UK) Limited Norfolk NR31 7QU (GB) (74) Representative: Jones, William  Willow Lane House Willow Lane Norwich NR2 1EU Norwich NR2 1EU (GB)