Mesh assembly having reduced microphonics for a pick-up tube

Details Mesh assembly having reduced microphonics for a pick-up tube Mesh assembly having reduced microphonics for a pick-up tube

1980-10-31

1982-08-31

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313378, 313390, H01J 2908, H01J 3138

Patent

active

043474594

ABSTRACT:
A pick-up tube includes a generally cylindrical envelope having a faceplate at one end thereof and a cathode in the other end. A photoconductive target electrode is adjacent to the faceplate and a mesh assembly is disposed in spaced relation adjacent to the target electrode, between the target electrode and the cathode. The mesh assembly comprises a mesh electrode disposed between a frusto-conically shaped mesh support ring and a bow-shaped mesh damping ring. The mesh damping ring is fixedly attached at a plurality of points around its outer periphery to the mesh electrode and the mesh support ring. The inner periphery of the mesh damping ring is formed into a plurality of arcuately shaped regions extending therearound. Each of the arcuately shaped regions is interconnected by a portion of the damping ring which is in contact with the mesh electrode. The annular region between the inner periphery and the outer periphery of the bow-shaped damping ring and the axially extending region between the damping ring and the mesh electrode forms a vibration damping chamber having a plurality of entrances formed by the arcuately shaped regions of the damping ring.

REFERENCES:
patent: 3287585 (1966-11-01), Randels
patent: 3325672 (1967-06-01), Funahashi et al.
patent: 3860851 (1975-01-01), Hamersma
patent: 3906278 (1975-09-01), Horton et al.
patent: 4323814 (1982-04-01), Benner et al.

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