(19)

(11)

EP 0 248 870 A1

(12)

(43) Date of publication: 16.12.1987 Bulletin 1987/51 (21) Application number: 87900180.0 (22) Date of filing: 02.12.1986

(51) International Patent Classification (IPC):  G01F 23/ 18( . ) H01C 10/ 10( . ) G01L 9/ 00( . ) (86) International application number: PCT/GB1986/000733 (87) International publication number: WO 1987/003679 (18.06.1987 Gazette 1987/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 03.12.1985 GB 19850029741 (71) Applicant: FLEXIGAGE LIMITED Maryhill Road Glasgow G20 (GB)	(72) Inventor: JACKSON, John Jordanhill Glasgow G13 1TU (GB)