(19)

(11)

EP 0 095 493 A1

(12)

(43) Date of publication: 07.12.1983 Bulletin 1983/49 (21) Application number: 83900199.0 (22) Date of filing: 07.12.1982

(51) International Patent Classification (IPC):  G09B 5/ 06( . ) G09B 17/ 00( . ) G09B 11/ 00( . ) A63F 9/ 24( . ) (86) International application number: PCT/GB1982/000344 (87) International publication number: WO 1983/002188 (23.06.1983 Gazette 1983/15)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 08.12.1981 GB 19810036887 (71) Applicant: MERITBOND LIMITED London W1P 9LN (GB)	(72) Inventors: WALLACE, David Alexander Rippon Oxon (GB) TIFFIN, John Weightman Hemel Hempstead HP3 9PT (GB) THOMPSON, Richard Stradling London SW6 (GB)