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US 6,426,587 B1Granted
Thermionic emitter with balancing thermal conduction legs
AssigneeSiemens Aktiengesellschaft
InventorsErich Hell, Manfred Fuchs, Markus Schild
Life of this patent
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Abstract
A thermionic emitter has a flat emission surface that is subdivided by slits into generally spiral or serpentine conductor sections, the surface having legs extending therefrom that form part of the current supply terminals and that also serve for securing the emitter. Each of these legs has a portion with a longitudinal electrical resistance that is elevated compared to that of the conductor sections, such that areas of maximum temperature migrate from the middle of the emitter to its edges as the heating current increases.
Claims6
A thermionic emitter comprising:
- a substantially flat emission surface subdivided by a plurality of slits into a plurality of conductor sections;
- two electrically conductive legs connected to and proceeding from said emission surface for supplying current to said emission surface and for mounting said emission surface;
- and
- each of said legs having a portion thereof with an elevated longitudinal electrical resistance compared to a longitudinal electrical resistance of said conductor sections.
1 more element
Dependencies are inferred from the claim text.