(19)

(11)

EP 0 231 364 A1

(12)

(43) Date of publication: 12.08.1987 Bulletin 1987/33 (21) Application number: 86905140.0 (22) Date of filing: 08.08.1986

(51) International Patent Classification (IPC):  G08B 13/ 14( . ) G08B 13/ 20( . ) (86) International application number: PCT/AU1986/000228 (87) International publication number: WO 1987/000949 (12.02.1987 Gazette 1987/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.08.1985 AU 19850001856 (71) Applicant: MILLAR, Frederick William Frankston, 3199, Victoria (AU)	(72) Inventor: MILLAR, Frederick William Frankston, 3199, Victoria (AU)