(19)

(11)

EP 0 031 336 A1

(12)

(43) Date of publication: 08.07.1981 Bulletin 1981/27 (21) Application number: 80901169.0 (22) Date of filing: 02.06.1980

(51) International Patent Classification (IPC):  H01Q 1/ 28( . ) H01Q 25/ 02( . ) (86) International application number: PCT/US1980/000669 (87) International publication number: WO 1980/002774 (11.12.1980 Gazette 1980/28)

(84) Designated Contracting States: CH DE GB LI SE (30) Priority: 31.05.1979 US 19790043980 (71) Applicant: GENERAL ELECTRIC COMPANY Schenectady New York 12305 (US)	(72) Inventor: KINZEL, Joseph Anthony Liverpool, NY 13088 (US) (74) Representative: Slight, Geoffrey Charles, et al  Graham Watt & Co. Riverhead Sevenoaks Kent TN13 2BN Sevenoaks Kent TN13 2BN (GB)