Patent US3700950A successfully refreshed from Google Patents.
US3700950A
Expired / Lapsed
US
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X-ray tube
Assignee: Toshiba Corp
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Filing: 1971-05-05
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Granted: 1972-10-24
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Expires: 1991-05-05
Abstract
Abstract An X-ray tube whose vacuum vessel contains a target made of electrical insulation material, a source of charged particles and an electrode for accelerating charged particles emitted from said source wherein the target is impacted by a beam of charged particles thus accelerated so as to produce soft X-rays of particularly great intensity.
Inventors
- 👤 Terasawa Michitaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/112
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
An X-ray tube comprising a vacuum vessel; a source of charged particles received in said vacuum vessel; an acceleration electrode disposed opposite to said source of charged particles so as to accelerate charged particles emitted therefrom; a target made of alumina to generate characteristic X-rays of said material upon impingement of said accelerated charged particles; and an outlet port through which to draw out said X-rays.
Claim 2
Dependent Claim
66 words
An X-ray tube comprising a vacuum vessel; a source of charged particles received in said vacuum vessel; an acceleration electrode disposed opposite to said source of charged particles so as to accelerate charged particles emitted therefrom; a target made of alumina to generate characteristic X-rays of said material upon impingement of said accelerated charged particles; and an outlet port through which to draw out said X-rays.
Claim 3
Dependent Claim
25 words
The X-ray tube according to claim 1 wherein tHe source of charged particles is an ion generator including means for adjusting gas pressure prevailing therein.
Claim 4
Dependent Claim
37 words
The X-ray tube according to claim 1 wherein there is provided an X-ray outlet port for directly projecting the characteristic X-rays of the material of a target on an X-ray-receiving apparatus without using an X-ray permeable film.
Claim 5
Dependent Claim
57 words
The X-ray tube according to claim 1 wherein there is provided means for equalizing gas pressure acting on the opposite surfaces of an X-ray permeable film through which to draw out said characteristic X-rays and there is also provided an X-ray outlet port assembly for projecting said characteristic X-rays through said film on an X-ray receiving apparatus.
Claim 6
Dependent Claim
57 words
The X-ray tube according to claim 2 wherein there is provided means for equalizing gas pressure acting on the opposite surfaces of an X-ray permeable film through which to draw out said characteristic X-rays and there is also provided an X-ray outlet port assembly for protecting said characteristic X-rays through said film on an X-ray receiving apparatus.
References Cited (Backward Citations)
US1953813A
Cited
US3492521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |