US3825786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the power x-ray tubes and apparatus for carrying out the method
Assignee: Individual
•
Filing: 1973-01-17
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Granted: 1974-07-23
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Expires: 1993-01-17
Abstract
Abstract A method for increasing the electron beam density and power of X-ray tubes, and a novel X-ray tube construction, wherein the target is in the form of an elongated member of target material, such as a strip, tape or filament, which is mechanically moved across the path of the electron beam to continuously present cold target material to the beam and remove heated target material from the electron beam path for cooling at a location spaced therefrom.
Inventors
- 👤 H Einighammer
- 👤 R Hauke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:56
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/24; H01J35/28; H01J35/02; H01J35/04; H01J35/08; H01J35/112; H01J35/116
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A method of increasing the X-ray radiation density capacity of X-ray tubes having a moving anode, comprising passing an elongated target tape having a continuous metallic portion along its length through the X-ray focal zone of an X-ray tube to serve as a moving anode target for the bombarding beam of electrons or ions in the X-ray tube, and mechanically carrying away the heat generated at the X-ray focal zone by bombardment of the moving anode target tape by transferring the portions of the target tape being bombarded away from the region of the focal zone at such velocity that the heating of the bombarded target tape material remains below a temperature critical for the target material.
Claim 2
Independent Claim
117 words
A method of increasing the X-ray radiation density capacity of X-ray tubes having a moving anode, comprising passing an elongated target tape having a continuous metallic portion along its length through the X-ray focal zone of an X-ray tube to serve as a moving anode target for the bombarding beam of electrons or ions in the X-ray tube, and mechanically carrying away the heat generated at the X-ray focal zone by bombardment of the moving anode target tape by transferring the portions of the target tape being bombarded away from the region of the focal zone at such velocity that the heating of the bombarded target tape material remains below a temperature critical for the target material.
Claim 3
Dependent Claim
190 words
Apparatus for increasing the X-ray radiation density capacity of X-ray tubes comprising an X-ray tube envelope having a subatmospheric pressure therein and means for generating and directing a beam of electrons or ions to a target zone within the envelope, a moving anode target for the X-ray tube in the form of an elongated thin web of material having a large longitudinal dimension relative to its transverse dimension and including a metallic portion for producing X-rays responsive to bombardment by the beam, means for continuously feeding the elongated target web along a feed path located in part externally of the X-ray tube and passing through the target zone to continuously present cool target web portions in the path of the beam and withdraw beam-heated-portions of the web from the beam path during bombardment thereof, the X-ray tube enevelope having inlet and outlet openings therein for passage of the target web from externally of the envelope to the target zone and return to locations externally of the tube, and inlet and outlet pressure locks along the web feed path at said openings to preserve the subatmospheric pressure conditions within the envelope.
Claim 4
Dependent Claim
190 words
Apparatus for increasing the X-ray radiation density capacity of X-ray tubes comprising an X-ray tube envelope having a subatmospheric pressure therein and means for generating and directing a beam of electrons or ions to a target zone within the envelope, a moving anode target for the X-ray tube in the form of an elongated thin web of material having a large longitudinal dimension relative to its transverse dimension and including a metallic portion for producing X-rays responsive to bombardment by the beam, means for continuously feeding the elongated target web along a feed path located in part externally of the X-ray tube and passing through the target zone to continuously present cool target web portions in the path of the beam and withdraw beam-heated-portions of the web from the beam path during bombardment thereof, the X-ray tube enevelope having inlet and outlet openings therein for passage of the target web from externally of the envelope to the target zone and return to locations externally of the tube, and inlet and outlet pressure locks along the web feed path at said openings to preserve the subatmospheric pressure conditions within the envelope.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 2, wherein the target is constructed as tape or strip.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 2, wherein the target is constructed as filament.
Claim 7
Dependent Claim
12 words
Apparatus according to claim 2, wherein the target is a metal wire.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 2, including metallic guide pins in the tube over which the target web is trained to position the web in the target zone.
Claim 9
Dependent Claim
13 words
Apparatus according to claim 2, wherein the target is constructed as endless loop.
Claim 10
Dependent Claim
20 words
Apparatus according to claim 7, wherein the target forms an endless loop turned through 180* to define a Mobius strip.
Claim 11
Dependent Claim
53 words
Apparatus according to claim 2, including a supply reel and a take-up reel supported externally of the X-ray tube, the target web being trained about said reels, and means for driving at least one of the reels to withdraw web material from the supply reel and wind web material on the take-up reel.
Claim 12
Dependent Claim
29 words
Apparatus according to claim 9, including forced air propelling means for blowing cool air on the weB portions withdrawn along the feed path externally of said outlet pressure lock.
References Cited (Backward Citations)
US3721847A
Cited
US3731128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |