(19)

(11)

EP 0 513 065 A1

(12)

(43) Date of publication: 19.11.1992 Bulletin 1992/47 (21) Application number: 91902874.0 (22) Date of filing: 29.01.1991

(51) International Patent Classification (IPC):  H02G 3/ 08( . ) H02G 3/ 16( . ) (86) International application number: PCT/GB1991/000121 (87) International publication number: WO 1991/011839 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 30.01.1990 GB 19900002021 (71) Applicant: GRAU LIMITED Redditch Worcestershire B98 7EZ (GB)	(72) Inventor: BROOME, William Sidney Inkberrow, Worcestershire WR7 4EJ (GB) (74) Representative: Leach, John Nigel, et al  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)