(19)

(11)

EP 0 108 133 A1

(12)

(43) Date of publication: 16.05.1984 Bulletin 1984/20 (21) Application number: 83901993.0 (22) Date of filing: 29.04.1983

(51) International Patent Classification (IPC):  G01F 11/ 18( . ) (86) International application number: PCT/US1983/000651 (87) International publication number: WO 1983/003898 (10.11.1983 Gazette 1983/26)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 29.04.1982 US 19820361533 30.04.1982 US 19820361532 01.02.1983 US 19830462950 (71) Applicant: MISNER, Richard I. Carter Lake, IA 51510 (US)	(72) Inventor: MISNER, Richard I. Carter Lake, IA 51510 (US)