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US 3,946,261 AGranted
Dual filament X-Ray tube
AssigneeThe Machlett Laboratories, Inc.
InventorsWilliam P. Holland, Capleton I. Swanson, Jacob A. Randmer
Life of this patent
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Abstract
An X-ray tube including a tubular envelope having therein two cathode filaments operatively disposed in spaced relationship with an anode target surface, one filament being made of a material suitable for low current operation and the other filament being made of a material suitable for high current operation of the X-ray tube.
Claims8
An X-ray tube comprising:
- an envelope
- an anode having a target surface disposed within the envelope;
- and
- cathode means operatively spaced from the target surface and including a pair of separately operable, electron emitters for directing respective electron beams onto the target surface and generating associated X-ray beams, one of the emitters being made of thoriated tungsten material and the other being made of substantially pure tungsten material.
1 more element
Dependencies are inferred from the claim text.