(19)

(11)

EP 0 230 445 A1

(12)

(43) Date of publication: 05.08.1987 Bulletin 1987/32 (21) Application number: 86904287.0 (22) Date of filing: 11.07.1986

(51) International Patent Classification (IPC):  G10H 3/ 12( . ) G10H 3/ 18( . ) (86) International application number: PCT/GB1986/000402 (87) International publication number: WO 1987/000331 (15.01.1987 Gazette 1987/01)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.07.1985 GB 19850017547 (71) Applicant: XAX LIMITED Aldwych London WC2B 4JP (GB)	(72) Inventor: EVANS, Jeremy Mark Brighton, Sussex (GB) (74) Representative: George, Sidney Arthur  GILL JENNINGS & EVERY 53-64 Chancery Lane London WC2A 1HN London WC2A 1HN (GB)