(19)

(11)

EP 0 494 198 A1

(12)

(43) Date of publication: 15.07.1992 Bulletin 1992/29 (21) Application number: 90914180.0 (22) Date of filing: 26.09.1990

(51) International Patent Classification (IPC):  H03G 3/ 12( . ) H03G 3/ 20( . ) (86) International application number: PCT/FI1990/000226 (87) International publication number: WO 1991/005406 (18.04.1991 Gazette 1991/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 28.09.1989 FI 19890004591 (71) Applicant: OY DIGIXRAY LTD. SF-57130 Savonlinna (FI)	(72) Inventors: OLKKONEN, Hannu SF-70150 Kuopio (FI) PUUMALAINEN, Pertti SF-57130 Savonlinna (FI) (74) Representative: Siebmanns, Hubertus  Gotapatent AB, Box 154 S-561 22 Huskvarna S-561 22 Huskvarna (SE)