(19)

(11)

EP 0 128 940 A1

(12)

(43) Date of publication: 27.12.1984 Bulletin 1984/52 (21) Application number: 84900285.0 (22) Date of filing: 20.12.1983

(51) International Patent Classification (IPC):  H03K 17/ 0424( . ) H03K 17/ 60( . ) H03K 17/ 06( . ) H03K 17/ 00( . ) (86) International application number: PCT/GB1983/000339 (87) International publication number: WO 1984/002624 (05.07.1984 Gazette 1984/16)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 20.12.1982 GB 19820036179 (71) Applicant: LANSING BAGNALL LIMITED Basingstoke Hampshire RG21 2XJ (GB)	(72) Inventor: GURWICZ, David Tyne & Wear (GB)