(19)

(11)

EP 0 466 796 A1

(12)

(43) Date of publication: 22.01.1992 Bulletin 1992/04 (21) Application number: 90906394.0 (22) Date of filing: 06.04.1990

(51) International Patent Classification (IPC):  G01L 9/ 00( . ) (86) International application number: PCT/SE1990/000241 (87) International publication number: WO 1990/012298 (18.10.1990 Gazette 1990/24)

(84) Designated Contracting States: CH DE FR GB IT LI (30) Priority: 06.04.1989 SE 19890001209 (71) Applicants: STEMME, Nils, Göran S-412 57 Göteborg (SE) STEMME, Nils Gustav Erik S-412 71 Göteborg (SE)	(72) Inventors: STEMME, Nils, Göran S-412 57 Göteborg (SE) STEMME, Nils Gustav Erik S-412 71 Göteborg (SE) (74) Representative: Berglund, Gustav Arthur  AWAPATENT AB, Box 5117 S-200 71 Malmö S-200 71 Malmö (SE)