Impregnated cathode structure
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United States of America Patent
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-
Oct 17, 1995
Issued Date -
N/A
app pub date -
Nov 28, 1994
filing date -
Jun 13, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impregnated cathode structure has: (1) a sleeve having a truncated conically-shaped top portion with an opening having a predetermined diameter at the center thereof; (2) oxide cathode material formed within and conforming to the shape of the sleeve to form a point exposed through the opening; (3) a receiver forming part of said sleeve for retaining the oxide cathode material; (4) a backing plug which divides the inside of the sleeve so as to form a space for the receiver; and (5) a heater installed in the sleeve below the backing plug.
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