(19)

(11)

EP 0 022 835 A1

(12)

(43) Date of publication: 28.01.1981 Bulletin 1981/04 (21) Application number: 80900248.0 (22) Date of filing: 04.02.1980

(51) International Patent Classification (IPC):  H02K 9/ 19( . ) (86) International application number: PCT/GB1980/000020 (87) International publication number: WO 1980/001629 (07.08.1980 Gazette 1980/18)

(84) Designated Contracting States: DE FR GB (30) Priority: 02.02.1979 GB 19790003729 (71) Applicant: LUCAS INDUSTRIES public limited company Birmingham, B19 2XF West Midlands (GB)	(72) Inventor: GRIFFITHS, Trevor James Powys Wales (GB)