(19)

(11)

EP 0 882 278 A1

(12)

(43) Date of publication: 09.12.1998 Bulletin 1998/50 (21) Application number: 96944170.0 (22) Date of filing: 23.12.1996

(51) International Patent Classification (IPC):  G08B 25/ 01( . ) G08B 29/ 16( . ) (86) International application number: PCT/SE1996/001747 (87) International publication number: WO 1997/024703 (10.07.1997 Gazette 1997/30)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 29.12.1995 SE 19950004697 23.02.1996 SE 19960000698 (71) Applicant: SPC Systemutveckling AB 104 35 Stockholm (SE)	(72) Inventor: PERSSON, Gunnar, Oskar S-141 45 Huddinge (SE) (74) Representative: Sundström, Per Olof, et al  Stenhagen Patentbyra AB P.O. Box 4630 116 91 Stockholm 116 91 Stockholm (SE)