(19)

(11)

EP 0 504 217 A1

(12)

(43) Date of publication: 23.09.1992 Bulletin 1992/39 (21) Application number: 91900305.0 (22) Date of filing: 05.12.1990

(51) International Patent Classification (IPC):  H02K 53/ 00( . ) H02N 11/ 00( . ) (86) International application number: PCT/GB1990/001890 (87) International publication number: WO 1991/008610 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 06.12.1989 GB 19890027569 (71) Applicant: WINSTANLEY, James Hindley Green Wigan WN2 4XF (GB)	(72) Inventor: WINSTANLEY, James Hindley Green Wigan WN2 4XF (GB) (74) Representative: Low, Peter John  Wilson, Gunn, M'Caw & Co., 41-51 Royal Exchange, Cross Street Manchester, M2 7BD Manchester, M2 7BD (GB)