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US 10,593,508 B2Granted
Emitter including a zigzag current path and rib portions, and X-ray tube
AssigneeCanon 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.
Claims12
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;
- 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
- a slit for forming a current path on the electron emission surface formed at the base portion, wherein the slit is formed along the rib portion to divide the rib portion into rib portions.
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, 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 a slit for forming a current path on the electron emission surface formed at the base portion, wherein the slit is formed along the rib portion to divide the rib portion;
- 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 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;
- 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
- a slit for forming a current path on the electron emission surface formed at the base portion, wherein the slit is formed along the rib portion to divide the rib portion into rib portions.
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, 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 a slit for forming a current path on the electron emission surface formed at the base portion, wherein the slit is formed along the rib portion to divide the rib portion;
- 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.