(19)

(11)

EP 0 545 930 A1

(12)

(43) Date of publication: 16.06.1993 Bulletin 1993/24 (21) Application number: 91909782.0 (22) Date of filing: 16.05.1991

(51) International Patent Classification (IPC):  G01G 3/ 08( . ) G01G 19/ 44( . ) (86) International application number: PCT/GB1991/000774 (87) International publication number: WO 1991/018268 (28.11.1991 Gazette 1991/27)

(84) Designated Contracting States: CH DE FR IT LI NL SE (30) Priority: 16.05.1990 GB 19900010931 27.02.1991 GB 19910004144 (71) Applicant: Byers, Edward Victor Konoulton, Nottingham NG12 3EA (GB)	(72) Inventor: Byers, Edward Victor Konoulton, Nottingham NG12 3EA (GB) (74) Representative: Allsop, John Rowland  European Patent Attorney 10 London End Beaconsfield, Bucks. HP9 2JH Beaconsfield, Bucks. HP9 2JH (GB)