(19)

(11)

EP 0 190 187 A1

(12)

(43) Date of publication: 13.08.1986 Bulletin 1986/33 (21) Application number: 85903336.0 (22) Date of filing: 09.07.1985

(51) International Patent Classification (IPC):  G11B 33/ 04( . ) (86) International application number: PCT/GB1985/000306 (87) International publication number: WO 1986/000746 (30.01.1986 Gazette 1986/03)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.07.1984 GB 19840017657 (71) Applicant: Wakelin, Thomas Camillus Vincent Liss Hampshire GU33 6NJ (GB)	(72) Inventor: Wakelin, Thomas Camillus Vincent Liss Hampshire GU33 6NJ (GB)