Patent US4547341A successfully refreshed from Google Patents.
Patent US3835341A successfully refreshed from Google Patents.
US3835341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectable multi-window x-ray tube
Assignee: Individual
•
Filing: 1973-06-25
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Granted: 1974-09-10
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Expires: 1993-06-25
Abstract
Abstract An x-ray tube provides with a plurality of windows mounted in a slide which is hermetically sealed on the exterior of the tube envelope. Movement of the slide which is effected by a bellow at each end of the slide places a window of given thickness and material in the path of x-rays generated within the tube permitting x-rays of different wave-lengths and intensities generated within the tube to be most efficiently and selectively transmitted. The windows may be of different thicknesses and of the same or different material.
Inventors
- 👤 W Zingaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:05
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/16; H01J35/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
An x-ray tube comprising an evacuated envelope, cathode and anode electrodes in said envelope for producing x-rays, a port in said envelope for the transmission of the x-rays generated within said tube, a first material relatively more transparent to x-rays of longer wave-length and a second material relatively less transparent to longer wave-length x-rays but more resistant to electron bombardment, and means for moving and positioning one of said latter materials to cover said port without interrupting the vacuum in said envelope.
Claim 2
Dependent Claim
82 words
An x-ray tube comprising an evacuated envelope, cathode and anode electrodes in said envelope for producing x-rays, a port in said envelope for the transmission of the x-rays generated within said tube, a first material relatively more transparent to x-rays of longer wave-length and a second material relatively less transparent to longer wave-length x-rays but more resistant to electron bombardment, and means for moving and positioning one of said latter materials to cover said port without interrupting the vacuum in said envelope.
Claim 3
Dependent Claim
31 words
An x-ray tube as claimed in claim 1 in which each of said materials is positioneD in a hermetically sealed sleeve which is slideable over the exterior surface of said envelope.
Claim 4
Dependent Claim
27 words
An x-ray tube as claimed in claim 2 in which the slide is attached at each end to a bellows which is hermetically sealed to the envelope.
Claim 5
Dependent Claim
30 words
An x-ray tube as claimed in claim 3 in which the window relatively more transparent to x-radiation has a thickness less than that of the window less transparent to x-radiation.
Claim 6
Dependent Claim
25 words
An x-ray tube as claimed in claim 3 in which the window includes an element which absorbs unwanted lines produced by excitation of the anode.
Claim 7
Dependent Claim
14 words
An x-ray tube as claimed in claim 4 in which the window is beryllium.
Claim 8
Dependent Claim
17 words
An x-ray tube as claimed in claim 5 in which the window is beryllium coated with titanium.
References Cited (Backward Citations)
US2617953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |