(19)

(11)

EP 0 134 212 A1

(12)

(43) Date of publication: 20.03.1985 Bulletin 1985/12 (21) Application number: 83902687.0 (22) Date of filing: 29.08.1983

(51) International Patent Classification (IPC):  G09B 15/ 06( . ) G10D 3/ 16( . ) (86) International application number: PCT/AU1983/000119 (87) International publication number: WO 1984/001046 (15.03.1984 Gazette 1984/07)

(84) Designated Contracting States: AT CH DE FR GB LI NL (30) Priority: 27.08.1982 AU 19820005586 05.10.1982 AU 19820006199 (71) Applicant: HANLY, Leo Denis Vaughan Floreat Park WA 6014 (AU)	(72) Inventor: HANLY, Leo Denis Vaughan Floreat Park WA 6014 (AU)