(19)

(11)

EP 0 570 459 A1

(12)

(43) Date of publication: 24.11.1993 Bulletin 1993/47 (21) Application number: 92904654.0 (22) Date of filing: 06.02.1992

(51) International Patent Classification (IPC):  G01B 11/ 00( . ) G01G 17/ 08( . ) (86) International application number: PCT/SE1992/000069 (87) International publication number: WO 1992/014116 (20.08.1992 Gazette 1992/22)

(84) Designated Contracting States: BE DE DK FR GB NL (30) Priority: 08.02.1991 SE 19910000387 (71) Applicant: FRIBERG, Per-Olof S-265 00 Ästorp (SE)	(72) Inventor: FRIBERG, Per-Olof S-265 00 Ästorp (SE) (74) Representative: Berglund, Gustav Arthur, et al  AWAPATENT AB, Berga Allé 1 S-254 52 Helsingborg S-254 52 Helsingborg (SE)