(19)

(11)

EP 0 103 629 A1

(12)

(43) Date of publication: 28.03.1984 Bulletin 1984/13 (21) Application number: 83901292.0 (22) Date of filing: 10.03.1983

(51) International Patent Classification (IPC):  G08B 13/ 24( . ) (86) International application number: PCT/US1983/000316 (87) International publication number: WO 1983/003203 (29.09.1983 Gazette 1983/23)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 15.03.1982 US 19820358299 15.03.1982 US 19820358383 01.04.1982 US 19820364264 (71) Applicant: PROGRESSIVE DYNAMICS INC. Marshall MI 49068 (US)	(72) Inventor: ECCLESTON, Larry Concord, MI 49237 (US) (74) Representative: Robinson, Anthony John Metcalf, et al  Kilburn & Strode 30 John Street London, WC1N 2DD London, WC1N 2DD (GB)