(19)

(11)

EP 0 232 253 A1

(12)

(43) Date of publication: 19.08.1987 Bulletin 1987/34 (21) Application number: 85903939.0 (22) Date of filing: 29.07.1985

(51) International Patent Classification (IPC):  G01D 5/ 20( . ) (86) International application number: PCT/US1985/001427 (87) International publication number: WO 1987/000951 (12.02.1987 Gazette 1987/04)

(84) Designated Contracting States: DE FR GB (71) Applicants: D'ANTONIO, Nicholas F. Liverpool NY 13090 (US) D'ANTONIO, Ronald W. Baltimore, MD 21227 (US)	(72) Inventors: D'ANTONIO, Nicholas F. Liverpool NY 13090 (US) D'ANTONIO, Ronald W. Baltimore, MD 21227 (US) (74) Representative: Muir, Ian R., et al  HASELTINE LAKE & CO. Hazlitt House 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)