(19)
(11) EP 0 421 716 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.08.1991 Bulletin 1991/33

(43) Date of publication A2:
10.04.1991 Bulletin 1991/15

(21) Application number: 90310750.6

(22) Date of filing: 01.10.1990
(51) International Patent Classification (IPC)5H01J 23/22
(84) Designated Contracting States:
DE FR

(30) Priority: 02.10.1989 GB 8922144

(71) Applicant: EEV LIMITED
Chelmsford, Essex, CM1 2QU (GB)

(72) Inventor:
  • Fox, David Bernard
    Chelmsford, Essex, CM1 1TG (GB)

(74) Representative: Cockayne, Gillian et al
GEC Patent Department Waterhouse Lane
Chelmsford, Essex CM1 2QX
Chelmsford, Essex CM1 2QX (GB)


(56) References cited: : 
   
       


    (54) Anode for a magnetron and method of manufacturing such an anode


    (57) An anode for a magnetron comprises a cylinder (1) having a plurality of vanes (15) extending radially inwardly therefrom, the vanes having at least two slots (17) formed by substantially circular grooves (5,7,9) with groove centres at substantially the same radius and at least two straps (19,23) located one in each of the slots (17).
    The invention also includes a method of making such an anode.







    Search report