(19)

(11)

EP 0 225 365 A1

(12)

(43) Date of publication: 16.06.1987 Bulletin 1987/25 (21) Application number: 86903508.0 (22) Date of filing: 06.06.1986

(51) International Patent Classification (IPC):  G10H 3/ 18( . ) (86) International application number: PCT/GB1986/000320 (87) International publication number: WO 1986/007484 (18.12.1986 Gazette 1986/27)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.06.1985 GB 19850014542 (71) Applicant: SYRINX INNOVATIONS LIMITED Edinburgh EH3 6QU (GB)	(72) Inventor: STRACHAN, John, Scott Edinburgh EH2 (GB) (74) Representative: Wotherspoon, Graham  Kirkland House Bonhill Alexandria Dunbartonshire G83 9HT Dunbartonshire G83 9HT (GB)