(19)

(11)

EP 0 458 938 A1

(12)

(43) Date of publication: 04.12.1991 Bulletin 1991/49 (21) Application number: 91901284.0 (22) Date of filing: 19.12.1990

(51) International Patent Classification (IPC):  G08B 17/ 12( . ) (86) International application number: PCT/EP1990/002244 (87) International publication number: WO 1991/009390 (27.06.1991 Gazette 1991/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 20.12.1989 IT 19890048686 (71) Applicant: SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE S.p.A. I-00131 Roma (IT)	(72) Inventors: BROGI, Giulio I-00143 Rome (IT) PIETRANERA, Luca I-00186 Rome (IT) FRAU, Francesco I-00151 Rome (IT) (74) Representative: Gustorf, Gerhard, Dipl.-Ing.  Patentanwalt Dipl.-Ing. Gerhard Gustorf Bachstrasse 6 A D-84036 Landshut D-84036 Landshut (DE)