(19)

(11)

EP 0 097 179 A1

(12)

(43) Date of publication: 04.01.1984 Bulletin 1984/01 (21) Application number: 83900005.0 (22) Date of filing: 16.12.1982

(51) International Patent Classification (IPC):  B66C 13/ 46( . ) G08G 1/ 04( . ) G01S 1/ 70( . ) G08G 3/ 00( . ) (86) International application number: PCT/AU1982/000209 (87) International publication number: WO 1983/002165 (23.06.1983 Gazette 1983/15)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 16.12.1981 AU 19810001976 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventors: KACHWALLA, Zain Pennant Hills, NSW 2120 (AU) POULTON, Geoffrey Thomas Thornleigh, NSW 2120 (AU) CRAGGS, John Stanley Beecroft, NSW 2119 (AU) (74) Representative: McCulloch, Norman Little, et al  Mathys & Squire 10 Fleet Street London EC4Y 1AY London EC4Y 1AY (GB)