(19)

(11)

EP 0 923 800 A1

(12)

(43) Date of publication: 23.06.1999 Bulletin 1999/25 (21) Application number: 97937349.0 (22) Date of filing: 03.09.1997

(51) International Patent Classification (IPC):  H01F 19/ 00( . ) H01T 4/ 08( . ) (86) International application number: PCT/AU1997/000567 (87) International publication number: WO 1998/010498 (12.03.1998 Gazette 1998/10)

(84) Designated Contracting States: AT CH DE DK ES FI FR GB IT LI NL PT SE (30) Priority: 04.09.1996 AU 1996PO02117 07.03.1997 AU 1997PO05532 (71) Applicant: Erico Lightning Technologies Pty. Ltd. Dowsings Point, TAS 7010 (AU)	(72) Inventors: KOSSMANN, Christopher, John New Town, TAS 7008 (AU) GUMLEY, John, Richard Kettering, TAS 7155 (AU) (74) Representative: Türk, Gille, Hrabal  Patentanwälte - European Patent Attorneys, Brucknerstrasse 20 40593 Düsseldorf 40593 Düsseldorf (DE)