Fast warmup cathode and method of making same

Details Fast warmup cathode and method of making same Fast warmup cathode and method of making same

1975-09-02

1977-02-22

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Indirectly heated cathodes

313 37, 313 41, 313 45, 313340, 427 77, H01J 120, H01J 1914

Patent

active

040094090

ABSTRACT:
A fast warmup cathode comprises a substrate of nickel or cathode nickel alloy having an outer and an inner surface. At least an area of the outer surface is formed to receive an electron emissive material. The inner surface is provided with a high heat radiating material. The high heat radiating material comprises vacuum deposited aluminum or magnesium which has been fired at a temperature above the melting point of the material to provide a surface which is darker than the unaltered surface of the substrate. aluminum or magnesium which has been

REFERENCES:
patent: 1555677 (1925-09-01), Leblanc
patent: 2057124 (1936-10-01), Van Gessel et al.
patent: 2236289 (1941-03-01), Hull
patent: 3262814 (1966-07-01), Provisor
patent: 3326648 (1967-06-01), Provisor
patent: 3662211 (1972-05-01), Millis
patent: 3823337 (1974-07-01), Van Stratum et al.

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