Magnetron filament having a quadrilateral cross-section

Details Magnetron filament having a quadrilateral cross-section Magnetron filament having a quadrilateral cross-section

1982-12-09

1985-01-15

Chatmon, Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

315 3951, 315337, H01J 115, H01J 1908, H01K 102

Patent

active

044940343

ABSTRACT:
A magnetron includes an evacuated envelope having therein a cathode assembly. An anode electrode surrounds the cathode assembly. The cathode assembly is formed of a helically wound filament having a quadrilateral cross-section. One of the surfaces of the quadrilateral cross-section filament is wider than the others. The wider surface of the filament faces the anode electrode. The quadrilateral cross-section thereby increasing the sag resistance of the filament.

REFERENCES:
patent: 2526054 (1950-10-01), Warren
patent: 2998544 (1961-08-01), Crapuchettes
patent: 3514661 (1970-05-01), Reaves
patent: 3566179 (1971-02-01), Kumpfer
patent: 3914639 (1975-10-01), Barraco et al.
patent: 4229676 (1980-10-01), Manoly
patent: 4230968 (1980-10-01), Oguro
patent: 4264843 (1981-04-01), Hammersand
RCA 8684-Large Power Magnetron Tube Bulletin, published Aug. 1975.
Mechanical Springs, Their Engineering and Design, pp. 23 & 27, published by the William D. Gibson Co.

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