High yield wide channel annular ring shaped getter device

Details High yield wide channel annular ring shaped getter device High yield wide channel annular ring shaped getter device

1990-10-01

1992-06-02

Yusko, Donald J.

Electric lamp and discharge devices

With getter

With contained getter

313481, 313546, 313553, 417 49, H01J 2994, H01J 1724, H01J 6126, F04B 3702

Patent

active

051189887

ABSTRACT:
An evaporable getter device, for mounting in an electron tube, comprises a holder whose bottom wall is provided with means for preventing detachment of getter metal vapor releasing material which has been pressed into the holder and which has a multiplicity of means which retard the transmission of heat in a circumferential direction through the getter metal vapor releasing material. When the getter device is heated by currents induced from a radio-frequency field generated by a coil positioned outside the electron tube large amounts of getter metal are released in a short time without detachment of material from the holder. The heat retarding means are preferably four equally spaced radial grooved formed in the upper surface of the getter metal vapor releasing material.

REFERENCES:
patent: 3428168 (1969-02-01), Reash
patent: 4642516 (1987-02-01), Ward et al.
patent: 4961040 (1990-10-01), della Porta et al.

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