(19)

(11)

EP 0 570 360 A1

(12)

(43) Date of publication: 24.11.1993 Bulletin 1993/47 (21) Application number: 90908442.0 (22) Date of filing: 30.05.1990

(51) International Patent Classification (IPC):  G21C 11/ 04( . ) G21D 9/ 00( . ) G21C 15/ 18( . ) (86) International application number: PCT/CA1990/000176 (87) International publication number: WO 1991/004560 (04.04.1991 Gazette 1991/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 15.09.1989 CA 19890611551 (71) Applicant: ECS-POWER SYSTEMS INC. Ottawa, Ontario K1S 5A3 (CA)	(72) Inventors: HEWITT, John, S. Ottawa, Ontario K1N 6R4 (CA) AJUS, Hani, C. Orleans, Ontario K4A 2R9 (CA) ATKINSON, John, C. Ottawa, Ontario K2C 2A7 (CA) CURRIE, Thomas, C. Ottawa, Ontario K1G 0V8 (CA) PEARSON, Bruce, M. Kanata, Ontario K2L 3A6 (CA) (74) Representative: Rottmann, Maximilian R.  c/o Rottmann, Zimmermann + Partner AG Glattalstrasse 37 CH-8052 Zürich CH-8052 Zürich (CH)