(19)

(11)

EP 0 040 228 A1

(12)

(43) Date of publication: 25.11.1981 Bulletin 1981/47 (21) Application number: 80902264.0 (22) Date of filing: 07.11.1980

(51) International Patent Classification (IPC):  A01J 7/ 00( . ) G01F 3/ 26( . ) A01J 5/ 01( . ) G01F 15/ 02( . ) (86) International application number: PCT/NL1980/000037 (87) International publication number: WO 1981/001230 (14.05.1981 Gazette 1981/12)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 08.11.1979 NL 19790008184 03.04.1980 NL 19800001991 13.05.1980 NL 19800002770 (71) Applicant: Kummer Electronics B.V. NL-8921 AB Leeuwarden (NL)	(72) Inventor: KUMMER, Jan NL-8921 AB Leeuwarden (NL) (74) Representative: den Boer, Jan Johannes, Ir., et al  Octrooibureau Polak & Charlouis Laan Copes van Cattenburch 80 NL-2585 GD The Hague NL-2585 GD The Hague (NL)