(19)

(11)

EP 0 515 590 A1

(12)

(43) Date of publication: 02.12.1992 Bulletin 1992/49 (21) Application number: 91918891.0 (22) Date of filing: 25.10.1991

(51) International Patent Classification (IPC):  H01Q 1/ 12( . ) H01Q 1/ 32( . ) (86) International application number: PCT/GB1991/001875 (87) International publication number: WO 1992/010865 (25.06.1992 Gazette 1992/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 05.12.1990 GB 19900026466 26.06.1991 GB 19910013933 (71) Applicant: LES WALLEN MANUFACTURING LIMITED Ramsgate, Kent CT11 7HJ (GB)	(72) Inventor: WALLEN, Leslie James Ramsgate, Kent. CT11 7HJ (GB) (74) Representative: Bankes, Stephen Charles Digby, et al  BARON & WARREN 18 South End Kensington London W8 5BU London W8 5BU (GB)