(19)

(11)

EP 0 144 345 A1

(12)

(43) Date of publication: 19.06.1985 Bulletin 1985/25 (21) Application number: 84901713.0 (22) Date of filing: 16.04.1984

(51) International Patent Classification (IPC):  G01B 11/ 00( . ) B25J 15/ 08( . ) B25J 19/ 04( . ) B25J 13/ 08( . ) B25J 19/ 02( . ) G01B 11/ 02( . ) (86) International application number: PCT/US1984/000570 (87) International publication number: WO 1984/004723 (06.12.1984 Gazette 1984/28)

(84) Designated Contracting States: DE GB NL SE (30) Priority: 27.05.1983 US 19830498881 (71) Applicant: AT&T Corp. New York, NY 10013-2412 (US)	(72) Inventors: BENI, Gerardo Old Bridge, NJ 08857 (US) HACKWOOD, Susan Holmdel, NJ 07733 (US) HORNAK, Lawrence, Anthony 1758 Raleigh Court Ocean, NJ 07712 (US) JACKEL, Janet, Lehr Holmdel, NJ 07733 (US) (74) Representative: Johnston, Kenneth Graham, et al  AT&T (UK) Ltd. 5 Mornington Road Woodford Green Essex, IG8 OTU Woodford Green Essex, IG8 OTU (GB)