(19)

(11)

EP 0 181 890 A1

(12)

(43) Date of publication: 28.05.1986 Bulletin 1986/22 (21) Application number: 85902416.0 (22) Date of filing: 13.05.1985

(51) International Patent Classification (IPC):  F21K 99/ 00( . ) F21L 4/ 00( . ) (86) International application number: PCT/AU1985/000108 (87) International publication number: WO 1985/005432 (05.12.1985 Gazette 1985/26)

(84) Designated Contracting States: BE CH DE FR GB LI NL (30) Priority: 16.05.1984 AU 19840005025 25.05.1984 AU 19840005198 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA Canberra, Australian Capital Territory 2600 (AU)	(72) Inventor: LAZIC, Ralph Elizabeth East, S.A. 5112 (AU)