(19)

(11)

EP 0 078 814 A1

(12)

(43) Date of publication: 18.05.1983 Bulletin 1983/20 (21) Application number: 82901346.0 (22) Date of filing: 11.05.1982

(51) International Patent Classification (IPC):  F41A 3/ 00( . ) F41A 5/ 00( . ) F41A 3/ 32( . ) (86) International application number: PCT/AU1982/000072 (87) International publication number: WO 1982/004116 (25.11.1982 Gazette 1982/28)

(84) Designated Contracting States: AT BE CH DE FR LI NL SE (30) Priority: 11.05.1981 AU 19810008811 (71) Applicant: LAWRENCE, Owen Leonard South Perth,Western Australia (AU)	(72) Inventor: LAWRENCE, Owen Leonard South Perth,Western Australia (AU) (74) Representative: Needle, Jacqueline  Page, White & Farrer 5, Plough Place New Fetter Lane London EC4A 1HY London EC4A 1HY (GB)