(19)

(11)

EP 0 648 330 A1

(12)

(43) Date of publication: 19.04.1995 Bulletin 1995/16 (21) Application number: 94913746.0 (22) Date of filing: 29.04.1994

(51) International Patent Classification (IPC):  G01N 21/ 65( . ) G01N 33/ 38( . ) G01N 25/ 18( . ) (86) International application number: PCT/GB1994/000932 (87) International publication number: WO 1994/025861 (10.11.1994 Gazette 1994/25)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 30.04.1993 GB 19930009030 (71) Applicant: Renishaw plc Wotton-Under-Edge Gloucestershire GL12 8JR (GB)	(72) Inventors: PITT, Gillies, David Gloucestershire GL15 6UU (GB) HAYWARD, Ian, Paul Merseyside L48 5HB (GB) BATCHELDER, David, Neville Yorkshire LS16 5PB (GB) (74) Representative: Jackson, John Timothy, et al  Renishaw plc Patent Department New Mills Wotton-under-Edge Gloucestershire GL12 8JR Wotton-under-Edge Gloucestershire GL12 8JR (GB)