Patent US3836804A successfully refreshed from Google Patents.
US3836804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slotted anode x-ray tube
Assignee: US Philips Corp
•
Filing: 1972-11-10
•
Granted: 1974-09-17
•
Expires: 1992-11-10
Abstract
Abstract The anode disc of an X-ray tube is provided with slots extending through anode material in the target area. Each slot has a width within the range of thermal expansion of the anode material so as to prevent thermal stresses in the anode body. In rotating anodes the slots extend from the circumference of the anode disc or the anode tyre well beyond the focal path. Radiation through the slots of the anode can be prevented by arranging the slots at an angle with respect to the direction of incidence of the electron.
Inventors
- 👤 G Frens
- 👤 Den Boomgaard J Van
- 👤 Suchtelen J Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:46
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A rotating anode X-ray tube comprising a compact anode body having a target area against which an electron beam emitted by a cathode is directed, a plurality of substantially radial slots extending through the anode body from the circumference across said target area to a distance from center of rotation, the width of each slot corresponding substantially to the maximum thermal expansion of the anode portion at said target area.
Claim 2
Dependent Claim
70 words
A rotating anode X-ray tube comprising a compact anode body having a target area against which an electron beam emitted by a cathode is directed, a plurality of substantially radial slots extending through the anode body from the circumference across said target area to a distance from center of rotation, the width of each slot corresponding substantially to the maximum thermal expansion of the anode portion at said target area.
Claim 3
Dependent Claim
24 words
An X-ray tube as claimed in claim 1, wherein said anode is formed by a body including a tyre portion at said target area.
Claim 4
Dependent Claim
27 words
An X-ray tube as claimed in claim 1, characterized in that the slots are situated in planes inclined to the direction of incidence of the electron beam.
Claim 5
Dependent Claim
43 words
A rotation symmetrical anode for an X-ray tube as claimed in claim 1, characterized in that it comprises a disc-like anode body having a diameter exceeding 100 mm and the width of the slots being in the range from 50 to 200 microns.
References Cited (Backward Citations)
DE618988C
Cited
US2430800A
Cited
US2935633A
Cited
US3149257A
Cited
US3751702A
Cited
US3763387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |