Cathode assembly

Details Cathode assembly Cathode assembly

1980-06-20

1983-01-25

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313 37, 313 45, 313446, H01J 194, H01J 1948

Patent

active

043705880

ABSTRACT:
A cathode assembly for cathode-ray tube which comprises a cathode sleeve with a blackened surface, a first cylindrical reflective member fixedly put on the top end portion of the cathode sleeve with a fixing point therebetween and having one end portion closed up with a metal substrate, and a second cylindrical reflective member attached to the cathode sleeve by means of support members so as to be on the same axis with the cathode sleeve and having a diameter greater than that of the cathode sleeve, both the first and second cylindrical reflective members being provided for reflecting radiant heat from the cathode sleeve, and the length of the first cylindrical reflective member being set so that an angle formed between the longitudinal direction of the cathode sleeve and a straight line connecting a heat radiation peak point on the outer surface of the cathode sleeve and the inner edge of a top opening portion of the second cylindrical reflective member, on a plane passing through the same axis, may be 30.degree. or less.

REFERENCES:
patent: 2914694 (1959-11-01), Ning Chin
patent: 3333138 (1967-07-01), Szegho
patent: 3351792 (1967-11-01), Kuryla
patent: 3385997 (1968-05-01), Vitzthum
patent: 3450927 (1969-06-01), Schmidt et al.
patent: 3895249 (1975-07-01), Andre et al.
patent: 4184100 (1980-01-01), Takahashi et al.
patent: 4185223 (1980-01-01), Anezaki

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