(19)

(11)

EP 0 704 144 A1

(12)

(43) Date of publication: 03.04.1996 Bulletin 1996/14 (21) Application number: 94919015.0 (22) Date of filing: 14.06.1994

(51) International Patent Classification (IPC):  G05F 1/ 625( . ) H02P 13/ 06( . ) H05B 41/ 42( . ) H02M 5/ 293( . ) H05B 41/ 36( . ) (86) International application number: PCT/NZ1994/000060 (87) International publication number: WO 1995/001084 (05.01.1995 Gazette 1995/02)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: SI (30) Priority: 17.06.1993 NZ 19930247913 (71) Applicant: SOUTHPOWER LIMITED Christchurch 8001 (NZ)	(72) Inventor: PEACH, David, Leslie, Lloyd Christchurch 8004 (NZ) (74) Representative: Wood, Anthony Charles, et al  Urquhart-Dykes & Lord 91 Wimpole Street London W1M 8AH London W1M 8AH (GB)