(19)

(11)

EP 0 952 879 A1

(12)

(43) Date of publication: 03.11.1999 Bulletin 1999/44 (21) Application number: 97933780.0 (22) Date of filing: 28.07.1997

(51) International Patent Classification (IPC):  A63G 21/ 20( . ) B61B 12/ 00( . ) B61B 11/ 00( . ) (86) International application number: PCT/GB1997/002035 (87) International publication number: WO 1998/025678 (18.06.1998 Gazette 1998/24)

(84) Designated Contracting States: DE ES FR GB (30) Priority: 12.12.1996 GB 19960025855 (71) Applicant: Skytrak International Limited Adlington, Lancashire PR7 4EZ (GB)	(72) Inventors: MORGAN, Dennis William Halesowen B62 9HS (GB) GEORGE, Frank Arthur Birmingham B42 1QU (GB) (74) Representative: Wardley, Diana Mary  Forrester & Boehmert, Franz-Joseph-Strasse 38 80801 München 80801 München (DE)