(19)

(11)

EP 0 801 831 A1

(12)

(43) Date of publication: 22.10.1997 Bulletin 1997/43 (21) Application number: 94928580.0 (22) Date of filing: 07.09.1994

(51) International Patent Classification (IPC):  H02G 5/ 06( . ) (86) International application number: PCT/US1994/010309 (87) International publication number: WO 1996/008064 (14.03.1996 Gazette 1996/12)

(84) Designated Contracting States: BE DE DK ES FR GB GR IE IT NL SE (71) Applicant: SPD TECHNOLOGIES INC. Philadelphia, PA 19116 (US)	(72) Inventor: YKEMA, John, I. Broomall, PA 19008 (US) (74) Representative: Lund, Preben, et al  Larsen & Birkeholm A/S, Banegardspladsen 1, P.O. Box 362 1570 Copenhagen V 1570 Copenhagen V (DK)