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US 2017/0287670 A1Published application
Emitter and x-ray tube
AssigneeToshiba Electron Tubes & Devices Co., Ltd.
InventorsMasataka UEKI, Masahiko Tezuka
Life of this patent
Estimating the term…
Abstract
According to one embodiment, an emitter comprise a base portion including an electron emission surface from which electrons are emitted, a pair of leg portions applying a voltage to the electron emission surface, and a rib portion formed by bending an edge of the base portion to a side opposite to the electron emission surface, on at least a part of an outline of the electron emission surface.
Claims20
An emitter comprising:
- a base portion including an electron emission surface from which electrons are emitted;
- a pair of leg portions applying a voltage to the electron emission surface;
- and
- a rib portion formed by bending an edge of the base portion to a side opposite to the electron emission surface, on at least a part of an outline of the electron emission surface.
1 more element
An emitter comprising:
- a base portion including an electron emission surface from which electrons are emitted;
- a pair of leg portions applying a voltage to the electron emission surface;
- and
- a rib portion protruding from the base portion toward a side surface opposite to the electron emission surface, on at least a part of an outline of the electron emission surface.
1 more element
An X-ray tube, comprising:
- a vacuum envelope;
- a cathode provided in the vacuum envelope to emit electrons, the cathode comprising an emitter,
- the emitter comprising a base portion including an electron emission surface from which electrons are emitted, a pair of leg portions applying a voltage to the electron emission surface, and a rib portion formed by bending an edge of the base portion to a side opposite to the electron emission surface, on at least a part of an outline of the electron emission surface;
- and
- an anode provided in the vacuum envelope, allowing the electrons emitted from the cathode to collide and generating X rays.
2 more elements
An X-ray tube, comprising:
- a vacuum envelope;
- a cathode provided in the vacuum envelope to emit electrons, the cathode comprising an emitter,
- the emitter comprising a base portion including an electron emission surface from which electrons are emitted, a pair of leg portions applying a voltage to the electron emission surface, and a rib portion protruding from the base portion toward a side surface opposite to the electron emission surface, on at least a part of an outline of the electron emission surface;
- and
- an anode provided in the vacuum envelope, allowing the electrons emitted from the cathode to collide and generating X rays.
2 more elements
Dependencies are inferred from the claim text.