(19)

(11)

EP 0 231 292 A1

(12)

(43) Date of publication: 12.08.1987 Bulletin 1987/33 (21) Application number: 86904745.0 (22) Date of filing: 06.08.1986

(51) International Patent Classification (IPC):  G01V 3/ 10( . ) H03K 17/ 955( . ) H03K 17/ 95( . ) (86) International application number: PCT/AU1986/000220 (87) International publication number: WO 1987/000933 (12.02.1987 Gazette 1987/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 06.08.1985 AU 19850001805 (71) Applicant: CONSOLIDATED TECHNOLOGY PTY. LTD. Seaford, VIC 3198 (AU)	(72) Inventor: SAUL, Iain, Godfrey Frankston, VIC 3199 (AU)