(19)

(11)

EP 0 196 292 A1

(12)

(43) Date of publication: 08.10.1986 Bulletin 1986/41 (21) Application number: 84903467.0 (22) Date of filing: 18.09.1984

(51) International Patent Classification (IPC):  A01B 63/ 111( . ) G01S 15/ 10( . ) (86) International application number: PCT/AU1984/000182 (87) International publication number: WO 1986/001906 (27.03.1986 Gazette 1986/07)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicant: AGTRONICS PTY. LTD. Welshpool, W.A. (AU)	(72) Inventors: RICHTER, Alan, Stanley Newdegate, W.A. 6355 (AU) MILLS, David, John Kewdale, W.A. 6105 (AU)