(19)

(11)

EP 0 767 980 A1

(12)

(43) Date of publication: 16.04.1997 Bulletin 1997/16 (21) Application number: 95923440.0 (22) Date of filing: 27.06.1995

(51) International Patent Classification (IPC):  H02H 5/ 12( . ) (86) International application number: PCT/GB1995/001518 (87) International publication number: WO 1996/000457 (04.01.1996 Gazette 1996/02)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 27.06.1994 GB 19940012880 30.09.1994 GB 19940019745 (71) Applicant: POWERBREAKER PLC. Harlow, Essex CM20 2BG (GB)	(72) Inventors: GILBERT, Hugh, Heathcote Cambridge CB4 1NR (GB) CATTO, Christopher, John Cambridgeshire CB3 8HU (GB) (74) Representative: Crawford, Andrew Birkby, et al  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC2A 1AY London WC2A 1AY (GB)