US3609432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin target x-ray tube with means for protecting the target
Assignee: Rigaku Denki Co Ltd
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Filing: 1968-11-08
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Granted: 1971-09-28
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Expires: 1988-11-08
Abstract
Abstract In X-ray tubes having thin targets such as foils, a problem is encountered in the deterioration of the foils, due to heat caused by bombardment by an electron beam. The invention avoids this deterioration in accordance with the one embodiment by providing water-cooled blocks in contact with the target and provided with openings through which the electron beam and/or emitted X-rays can pass and in accordance with another embodiment by providing an antioxidizing coating on the target.
Inventors
- 👤 Yoshihiro Shimula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A tube as claimed in claim 1 wherein said second means includes antioxidizing means to prevent the target from oxidizing.
Claim 2
Dependent Claim
24 words
A tube as claimed in claim 1 wherein the block is arranged between the target and source and the beam passes through said hole.
Claim 3
Dependent Claim
32 words
A tube as claimed in claim 1 wherein the target is arranged between the block and source and at least part of the X-rays emitted by the target pass through the hole.
Claim 4
Dependent Claim
79 words
A tube as claimed in claim 1 comprising a second block corresponding to the first, said blocks sandwiching the target therebetween, said blocks having said holes in coaxial conical form tapering towards each other to corresponding apex end openings, said passageway being constituted by corresponding annular semicircular grooves in the blocks, said grooves being juxtaposed to form a passage of toroidal shape, said tube further comprising means to supply and remove a cooling fluid to and from said passage.
Claim 5
Dependent Claim
31 words
A tube as claimed in claim 4 wherein said tube includes window means between the target and source for the passing of another part of the X-rays emitted by the target.
Claim 6
Dependent Claim
16 words
A tube as claimed in claim 1 wherein the passage is positioned internally of said tube.
Claim 7
Dependent Claim
16 words
A tube as claimed in claim 1 wherein the passage is positioned externally of said tube.
Claim 8
Dependent Claim
14 words
A tube as claimed in claim 1 wherein the target is a thin foil.
Claim 9
Dependent Claim
18 words
A tube as claimed in claim 2 wherein the antioxidizing means is a layer adhering to the target.
Claim 10
Dependent Claim
18 words
A tube as claimed in claim 1 wherein the block is of a metal having good thermal conductivity.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |