(19)

(11)

EP 0 247 029 A1

(12)

(43) Date of publication: 02.12.1987 Bulletin 1987/49 (21) Application number: 85905305.0 (22) Date of filing: 25.10.1985

(51) International Patent Classification (IPC):  G01R 22/ 00( . ) G01R 21/ 00( . ) G01R 11/ 64( . ) (86) International application number: PCT/US1985/002086 (87) International publication number: WO 1987/002783 (07.05.1987 Gazette 1987/10)

(84) Designated Contracting States: CH DE FR GB LI (71) Applicant: GENERAL ELECTRIC COMPANY Schenectady New York 12305 (US)	(72) Inventors: GERMER, Warren, Ralph Dover, NH 03820 (US) BALCH, Richard, Alan Rochester, NH 03867 (US)