(19)

(11)

EP 0 020 750 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 80900198.0 (22) Date of filing: 20.12.1979

(51) International Patent Classification (IPC):  H02K 41/ 03( . ) (86) International application number: PCT/US1979/001113 (87) International publication number: WO 1980/001342 (26.06.1980 Gazette 1980/14)

(84) Designated Contracting States: FR (30) Priority: 21.12.1978 US 19780971847 (71) Applicant: BARTON, Richard E. Scituate, MA 02060 (US)	(72) Inventor: BARTON, Richard E. Scituate, MA 02060 (US)