(19)

(11)

EP 0 119 253 A1

(12)

(43) Date of publication: 26.09.1984 Bulletin 1984/39 (21) Application number: 83903094.0 (22) Date of filing: 22.09.1983

(51) International Patent Classification (IPC):  G02B 5/ 20( . ) H01Q 15/ 00( . ) (86) International application number: PCT/GB1983/000235 (87) International publication number: WO 1984/001242 (29.03.1984 Gazette 1984/09)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 22.09.1982 GB 19820027074 (71) Applicant: Kent Scientific and Industrial Projects Limited Canterbury Kent CT2 7NR (GB)	(72) Inventors: PARKER, Edward, Andrew Kent (GB) LANGLEY, Richard, Jonathan Kent (GB) (74) Representative: Warren, Keith Stanley, et al  BARON & WARREN 18 South End Kensington London W8 5BU London W8 5BU (GB)