Fast warm up picture tube cathode cap having high heat emissivit

Details Fast warm up picture tube cathode cap having high heat emissivit Fast warm up picture tube cathode cap having high heat emissivit

1974-02-08

1976-05-18

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

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

313 37, 313 40, 313337, 313270, 427 77, H01J 114, H01J 1906, H01K 104

Patent

active

039581462

ABSTRACT:
Performance of fast warm up cathodes can be improved by providing a black heat radiating surface on the interior of the cathode cap. A particular material can be nichrome which is a nickel chromium alloy. The cathode cap material can be selected from any of the known cathode nickel alloys. A preferred method for accomplishing the result includes the steps of cladding a selected nickel alloy with the nichrome material and then forming the substantially cup shaped cap with the clad material on the interior thereof. The formed cathode cap is then fired for about 10 minutes or longer in wet dissociated ammonia at a temperature of about 900.degree. to 1300.degree.C to oxidize the available chromium on the surface of the nichrome. This produces an even dark surface thereon which has much higher heat radiating capabilities than the silver looking nickel cathode alloy.

REFERENCES:
patent: 1555677 (1925-09-01), Leblanc
patent: 2013419 (1935-09-01), Moran
patent: 2057124 (1936-10-01), Gessel et al.
patent: 2146098 (1939-02-01), Gessel et al.
patent: 2236289 (1941-03-01), Hull
patent: 2472189 (1949-06-01), Bienfait et al.
patent: 2717975 (1955-09-01), Wihtol
patent: 2723363 (1955-11-01), DeSantis et al.
patent: 2847604 (1958-08-01), Beggs et al.
patent: 2878410 (1959-03-01), Millis
patent: 3005926 (1961-10-01), Horner et al.
patent: 3262814 (1966-07-01), PROVISOR
patent: 3326648 (1967-06-01), Provisor
patent: 3374385 (1968-03-01), Lattimer
patent: 3376461 (1968-04-01), Millward
patent: 3881124 (1975-04-01), Buescher et al.

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