(19)

(11)

EP 0 220 275 A1

(12)

(43) Date of publication: 06.05.1987 Bulletin 1987/19 (21) Application number: 86903010.0 (22) Date of filing: 22.04.1986

(51) International Patent Classification (IPC):  H01H 13/ 702( . ) H03K 17/ 98( . ) (86) International application number: PCT/US1986/000846 (87) International publication number: WO 1986/006544 (06.11.1986 Gazette 1986/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 26.04.1985 US 19850727945 (71) Applicant: AT&T Corp. New York, NY 10013-2412 (US)	(72) Inventor: CHALASANI, Rao, Mallikarjuna Troy, MI 48098 (US)