(19)

(11)

EP 0 116 561 A1

(12)

(43) Date of publication: 29.08.1984 Bulletin 1984/35 (21) Application number: 83901605.0 (22) Date of filing: 17.05.1983

(51) International Patent Classification (IPC):  G05B 19/ 42( . ) (86) International application number: PCT/GB1983/000141 (87) International publication number: WO 1983/004114 (24.11.1983 Gazette 1983/27)

(84) Designated Contracting States: AT BE CH DE FR LI LU NL SE (30) Priority: 18.05.1982 GB 19820014470 14.02.1983 GB 19830004032 (71) Applicant: THOMAS, Gareth David Oxford (GB)	(72) Inventor: THOMAS, Gareth David Oxford (GB)