(19)

(11)

EP 0 760 105 A1

(12)

(43) Date of publication: 05.03.1997 Bulletin 1997/10 (21) Application number: 94928487.0 (22) Date of filing: 07.10.1994

(51) International Patent Classification (IPC):  G01V 8/ 12( . ) (86) International application number: PCT/GB1994/002188 (87) International publication number: WO 1995/010057 (13.04.1995 Gazette 1995/16)

(84) Designated Contracting States: BE DE FR GB IT NL SE (30) Priority: 07.10.1993 GB 19930020637 (71) Applicant: BRADBEER, Peter, Frederick Maidenhead, Berkshire SL6 0CT (GB)	(72) Inventor: BRADBEER, Peter, Frederick Maidenhead, Berkshire SL6 0CT (GB) (74) Representative: Smith, Norman Ian, et al  F.J. CLEVELAND & COMPANY 40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)