(19)

(11)

EP 0 784 782 A1

(12)

(43) Date of publication: 23.07.1997 Bulletin 1997/30 (21) Application number: 95932856.0 (22) Date of filing: 03.10.1995

(51) International Patent Classification (IPC):  G01B 11/ 22( . ) G01M 17/ 02( . ) G01B 21/ 18( . ) (86) International application number: PCT/GB1995/002340 (87) International publication number: WO 1996/010727 (11.04.1996 Gazette 1996/16)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.10.1994 GB 19940018091 (71) Applicant: Russell, Malcom Brian Marlow, Buckinghamshire SL7 3DL (GB)	(72) Inventor: Russell, Malcom Brian Marlow, Buckinghamshire SL7 3DL (GB) (74) Representative: Lynd, Michael Arthur  Edward Evans & Co. Chancery House 53-64 Chancery Lane London WC2A 1SD London WC2A 1SD (GB)