(19)

(11)

EP 0 876 669 A1

(12)

(43) Date of publication: 11.11.1998 Bulletin 1998/46 (21) Application number: 96938379.0 (22) Date of filing: 15.11.1996

(51) International Patent Classification (IPC):  H01F 7/ 16( . ) H01H 33/ 59( . ) H01F 7/ 122( . ) H01H 71/ 32( . ) (86) International application number: PCT/GB1996/002825 (87) International publication number: WO 1997/018569 (22.05.1997 Gazette 1997/22)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.11.1995 GB 19950023440 (71) Applicant: FKI PLC Halifax, West Yorkshire HX1 1EB (GB)	(72) Inventors: LANE, Stephen, Ernest Lancashire M43 6RW (GB) SNELL, Martin Lancashire BL8 2DZ (GB) (74) Representative: Charig, Raymond Julian  Eric Potter Clarkson, Park View House, 58 The Ropewalk Nottingham NG1 5DD Nottingham NG1 5DD (GB)