(19)

(11)

EP 0 112 889 A1

(12)

(43) Date of publication: 11.07.1984 Bulletin 1984/28 (21) Application number: 83902276.0 (22) Date of filing: 08.07.1983

(51) International Patent Classification (IPC):  G06F 3/ 033( . ) (86) International application number: PCT/GB1983/000170 (87) International publication number: WO 1984/000427 (02.02.1984 Gazette 1984/03)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 10.07.1982 GB 19820020137 (71) Applicant: SYRINX PRECISION INSTUMENTS LIMITED Edinburgh EH2 3LU (GB)	(72) Inventors: STRACHAN, John, Scott Edingburgh EH3 6ED (GB) SKRGATIC, Damir, Miroslav, Josip Livingston West Lothian (GB) (74) Representative: Wotherspoon, Graham, et al  FITZPATRICKS 4 West Regent Street Glasgow G2 1RS Scotland Glasgow G2 1RS Scotland (GB)