Flat filament for an x-ray tube, and an x-ray tube
AssigneeShimadzu Corporation
InventorTatsuya YOSHIZAWA
Life of this patent
Estimating the term…
Abstract
A flat filament includes a first electron emission surface, a first current supply leg, a second current supply leg, a second electron emission surface disposed laterally of the first electron emission surface and connected to a first end region of the first electron emission surface, a third current supply leg, a third electron emission surface disposed laterally of the first electron emission surface, opposite from the second electron emission surface, and connected to a second end region of the first electron emission surface, and a fourth current supply leg.
Claims18
A flat filament for an X-ray tube, comprising:
- a first electron emission surface;
- a first current supply leg connected to a first end region of the first electron emission surface;
- a second current supply leg connected to a second end region opposite from the first end region of the first electron emission surface;
- a second electron emission surface disposed laterally of the first electron emission surface and connected to the first end region of the first electron emission surface;
- a third current supply leg connected to a second end region of the second electron emission surface;
- a third electron emission surface disposed laterally of the first electron emission surface, opposite from the second electron emission surface, and connected to the second end region of the first electron emission surface;
- and
- a fourth current supply leg connected to a first end region of the third electron emission surface.
An X-ray tube having a cathode with a flat filament for generating an electron beam, and an anode for generating X-rays upon collision with the electron beam generated from the cathode,
- wherein the flat filament includes:
- a first electron emission surface;
- a first current supply leg connected to a first end region of the first electron emission surface;
- a second current supply leg connected to a second end region opposite from the first end region of the first electron emission surface;
- a second electron emission surface disposed laterally of the first electron emission surface and connected to the first end region of the first electron emission surface;
- a third current supply leg connected to a second end region of the second electron emission surface;
- a third electron emission surface disposed laterally of the first electron emission surface, opposite from the second electron emission surface, and connected to the second end region of the first electron emission surface;
- and
- a fourth current supply leg connected to a first end region of the third electron emission surface;
- the X-ray tube comprising a heating current supply source for supplying a heating current selectively to the first and second current supply legs and to the third and fourth current supply legs.
An X-ray tube of envelope rotation type having a cathode with a flat filament for generating an electron beam, an anode for generating X-rays upon collision with the electron beam generated from the cathode, a deflection coil for controlling a focal position where the electron beam collides with the anode by deflecting the electron beam generated from the cathode, and an envelope containing the cathode and the anode, the anode being rotatable with the envelope,
- wherein the flat filament includes:
- a first electron emission surface;
- a first current supply leg connected to a first end region of the first electron emission surface;
- a second current supply leg connected to a second end region opposite from the first end region of the first electron emission surface;
- a second electron emission surface disposed laterally of the first electron emission surface and connected to the first end region of the first electron emission surface;
- a third current supply leg connected to a second end region of the second electron emission surface;
- a third electron emission surface disposed laterally of the first electron emission surface, opposite from the second electron emission surface, and connected to the second end region of the first electron emission surface;
- and
- a fourth current supply leg connected to a first end region of the third electron emission surface;
- the X-ray tube comprising a heating current supply source for supplying a heating current selectively to the first and second current supply legs and to the third and fourth current supply legs.
Dependencies are inferred from the claim text.