(19)

(11)

EP 0 165 256 A1

(12)

(43) Date of publication: 27.12.1985 Bulletin 1985/52 (21) Application number: 84904069.0 (22) Date of filing: 08.11.1984

(51) International Patent Classification (IPC):  G01V 3/ 08( . ) (86) International application number: PCT/AU1984/000229 (87) International publication number: WO 1985/002268 (23.05.1985 Gazette 1985/12)

(84) Designated Contracting States: AT BE CH DE FR LI LU NL SE (30) Priority: 09.11.1983 AU 19830002303 (71) Applicant: CONSOLIDATED TECHNOLOGY (AUST) PTY. LTD. Seaford, VIC 3198 (AU)	(72) Inventor: SAUL, Iain, Godfrey Frankston, VIC 3199 (AU) (74) Representative: Stuart, Ian Alexander, et al  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)