(19)

(11)

EP 0 156 796 A1

(12)

(43) Date of publication: 09.10.1985 Bulletin 1985/41 (21) Application number: 83903097.0 (22) Date of filing: 28.09.1983

(51) International Patent Classification (IPC):  G01F 17/ 00( . ) G01G 3/ 14( . ) G01F 23/ 20( . ) (86) International application number: PCT/GB1983/000241 (87) International publication number: WO 1985/001576 (11.04.1985 Gazette 1985/09)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicant: CAIRNES, William Bedfordshire (GB)	(72) Inventor: CAIRNES, William Bedfordshire (GB)