(19)

(11)

EP 0 678 179 A1

(12)

(43) Date of publication: 25.10.1995 Bulletin 1995/43 (21) Application number: 92909667.0 (22) Date of filing: 12.05.1992

(51) International Patent Classification (IPC):  G05D 23/ 275( . ) (86) International application number: PCT/GB1992/000854 (87) International publication number: WO 1992/020945 (26.11.1992 Gazette 1992/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 16.05.1991 GB 19910010660 (71) Applicant: GRAHAM, Patrick Gerard Toomebridge, County Antrim BT41 3TH (GB)	(72) Inventor: GRAHAM, Patrick Gerard Toomebridge, County Antrim BT41 3TH (GB) (74) Representative: Kelly, Peter F., et al  F. R. Kelly & Co., 27 Clyde Road, Ballsbridge Dublin 4 Dublin 4 (IE)