Cathode for magnetron

Details Cathode for magnetron Cathode for magnetron

1986-12-17

1987-08-11

Demers, Arthur P.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313337, 313338, 315 3951, H01J 113, H01J 2550

Patent

active

046864130

ABSTRACT:
A method of manufacturing a cathode for magnetron comprises a cathode sleeve formed as a hollow cylinder, a heater inside the sleeve, two end shields formed around the sleeve at a prescribed interval and an electron emitting material applied around the sleeve between both end-shields, wherein a plurality of isolated projections are almost regularly and intergraly formed around the sleeve between the end-shields, and the above electron emitting material is applied onto the cathode sleeve to fill gaps among the plural projections.
According to the method of manufacturing a cathode of the present invention, the efficiency of electron emission and electric conductivity are not lowered, whereby the stable operation can be realized for a long term.

REFERENCES:
patent: 2782334 (1957-02-01), Gardner
patent: 2832005 (1958-04-01), Brown
patent: 3278791 (1966-10-01), Faure
patent: 3585438 (1971-06-01), Bell
patent: 4230005 (1980-10-01), Oguro
patent: 4380717 (1983-04-01), Pickering
patent: 4524297 (1985-06-01), Gartner

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