(19)

(11)

EP 0 197 979 A1

(12)

(43) Date of publication: 22.10.1986 Bulletin 1986/43 (21) Application number: 85904886.0 (22) Date of filing: 01.10.1985

(51) International Patent Classification (IPC):  G01D 11/ 28( . ) G12B 11/ 00( . ) (86) International application number: PCT/NL1985/000038 (87) International publication number: WO 1986/002157 (10.04.1986 Gazette 1986/08)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 02.10.1984 NL 19840003000 (71) Applicant: FISCHER, Willem Antonie NL-1561 PD Krommenie (NL)	(72) Inventor: FISCHER, Willem Antonie NL-1561 PD Krommenie (NL) (74) Representative: Bruin, Cornelis Willem, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 NL-2517 GK Den Haag NL-2517 GK Den Haag (NL)