(19)

(11)

EP 0 972 326 A1

(12)

(43) Date of publication: 19.01.2000 Bulletin 2000/03 (21) Application number: 97920030.0 (22) Date of filing: 01.04.1997

(51) International Patent Classification (IPC)7: H02G 5/06 (86) International application number: PCT/US9705/381 (87) International publication number: WO 9844/612 (08.10.1998 Gazette 1998/40)

(84) Designated Contracting States: DE DK ES FI FR GB GR IT NL SE (71) Applicant: SPD TECHNOLOGIES INC. Philadelphia, PA 19116-4299 (US)	(72) Inventors: YKEMA, John, I. Broomall, PA 19008 (US) BARBER, John, P. Dayton, OH 45429 (US) (74) Representative: Beissel, Jean  Office de Brevets,Ernest T. Freylinger S.A.234, route d'ArlonB.P. 48 8001 Strassen 8001 Strassen (LU)