Cathode ray tube

Details Cathode ray tube Cathode ray tube

1984-05-14

1988-01-26

Sikes, William L.

Electric lamp and discharge devices

Cathode ray tube

Envelope

313482, 313558, 313559, 313561, H01J 3100

Patent

active

047218827

ABSTRACT:
A television camera tube including a getter (23,24) is assembled so as to be thermally independent of an electron gun (4) and may be provided with any desired electric potential. The getter (23,24) is positioned in a tubular envelope portion (1) of the tube by means of a supporting member (12,21,25) which rests on a supporting edge (11) in the envelope (1). The supporting edge is formed by a stepped reduction of the internal transverse dimension of the envelope portion (1). The supporting member (12) comprises an inner ring (16) which is connected to an outer ring (15) in a limited number of places (19). In the circumferential direction the inner ring (16) and the outer ring (15) include an interruption (17) to counteract excessive heating of the rings during inductive heating of the getter (23,24). Metal strips (21) which support the getter (23,24) are connected to the inner ring (16). The supporting structure is well suited for use in comparatively small cathode ray tubes.

REFERENCES:
patent: 3197546 (1965-07-01), Hopper
patent: 4276494 (1981-06-01), van Roosmalen et al.

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