(19)

(11)

EP 0 260 309 A1

(12)

(43) Date of publication: 23.03.1988 Bulletin 1988/12 (21) Application number: 87902070.0 (22) Date of filing: 09.03.1987

(51) International Patent Classification (IPC):  G01F 11/ 02( . ) (86) International application number: PCT/DK1987/000026 (87) International publication number: WO 1987/005697 (24.09.1987 Gazette 1987/21)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.03.1986 DK 19860001123 (71) Applicant: ON COMPUTER ELECTRONICS A/S DK-2300 Copenhagen S (DK)	(72) Inventors: HANSEN, Ole, Koustrup DK-2450 Copenhagen SV (DK) WASS, Rene, Johnny, Bernhard DK-2500 Valby (DK)