(19)

(11)

EP 0 589 922 A1

(12)

(43) Date of publication: 06.04.1994 Bulletin 1994/14 (21) Application number: 92911131.0 (22) Date of filing: 09.06.1992

(51) International Patent Classification (IPC):  G08B 17/ 11( . ) (86) International application number: PCT/NO1992/000101 (87) International publication number: WO 1992/022812 (23.12.1992 Gazette 1992/32)

(84) Designated Contracting States: FR GB (30) Priority: 17.06.1991 NO 19910002325 (71) Applicant: RENNEMO, Björn N-6593 Mjosundet (NO)	(72) Inventor: RENNEMO, Björn N-6593 Mjosundet (NO) (74) Representative: Dealtry, Brian  Eric Potter & Clarkson St. Mary's Court St. Mary's Gate Nottingham NG1 1LE Nottingham NG1 1LE (GB)