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US 5,489,348 AGranted
Method for preflashing filaments for x-ray tube cathode assemblies
AssigneeGeneral Electric Company
InventorsBruce A. Knudsen, Clyde L. Briant
Life of this patent
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Abstract
Methods of making an improved high performance x-ray system having an improved cathode assembly which reduces tube failure due to filament misalignment or sagging and prevents costly reflashing of the filament during the manufacturing process is disclosed.
Claims13
A method for preflashing at least one filament suitable for use in an x-ray tube, the method comprising the steps of:
- providing a filament preflash structure having an inert atmosphere including a filament holding structure;
- inserting at least one filament suitable for use in an x-ray tube into the preflash structure operatively positioned on the filament holding structure;
- heating the at least one filament to a temperature sufficient to provide a desired microstructure, wherein during the heating step, sufficient electric power is provided to heat the filament up to about 2800.degree. C. and then hold the filament temperature at 2800.degree. C. for about two (2) to about five (5) seconds;
- and
- removing the at least one filament from the filament preflash structure.
2 more elements
A method for preflashing at least one filament suitable for use in an x-ray tube, the method comprising the steps of:
- providing a filament preflash structure having an inert atmosphere including a filament holding structure;
- inserting at least one filament suitable for use in an x-ray tube into the preflash structure operatively positioned on the filament holding structure;
- heating the at least one filament to a temperature sufficient to provide a desired microstructure, wherein during the heating step, sufficient power is provided to heat the filament to a temperature of about 2800.degree. C. and then to hold the filament at 2800.degree. C. for about two (2) seconds;
- and
- removing the at least one filament from the filament preflash structure.
2 more elements
Dependencies are inferred from the claim text.