(19)

(11)

EP 0 179 083 A1

(12)

(43) Date of publication: 30.04.1986 Bulletin 1986/18 (21) Application number: 85901523.0 (22) Date of filing: 09.04.1985

(51) International Patent Classification (IPC):  G01B 7/ 00( . ) G01B 21/ 00( . ) G01B 7/ 012( . ) (86) International application number: PCT/GB1985/000153 (87) International publication number: WO 1985/004706 (24.10.1985 Gazette 1985/23)

(84) Designated Contracting States: CH DE FR GB IT LI SE (30) Priority: 09.04.1984 GB 19840009091 (71) Applicant: Renishaw plc Wotton-Under-Edge Gloucestershire GL12 8JR (GB)	(72) Inventor: ROGERS, Michael, John Bristol BS18 7HX (GB)