US3753020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-anode x-ray tube
Assignee: Philips North America LLC
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Filing: 1971-11-26
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Granted: 1973-08-14
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Expires: 1991-11-26
Abstract
Abstract A plurality of anodes in an X-ray tube are each disposed at the circumferential portion of adjacent sectors having a common center which is concentric with a gear nonmovable fitted to the sectors. The gear is in mating arrangement with a worm screw for permitting selection of one of the anodes to be in line with a stream of electrons from the cathode.
Inventors
- 👤 W Zingaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:40
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/12; H01J35/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
An X-ray tube having a cathode and a plurality of anodes, said plurality of anodes including mount means for supporting said plurality of anodes, follower means for pivoting said mount means about a pivot point and moving said plurality of anodes with respect to said cathode, drive means engaging said follower means for moving said follower means to position a selected one of said plurality of anodes diametrically opposite the filament of said cathode, means for moving said drive means, bearing means for supporting said mount means, said mount means including sector having said plurality of anodes mounted on the circumferential portion thereof and the narrow section of said sector forming an annulus which is fitted on said bearing means for rotatable motion thereabout, and follower means including a spur gear mounted on said bearing means and non-rotatably linked with said annulus, whereby said mount means are rotated with said spur gear upon said drive means moving said spur gear.
Claim 2
Dependent Claim
160 words
An X-ray tube having a cathode and a plurality of anodes, said plurality of anodes including mount means for supporting said plurality of anodes, follower means for pivoting said mount means about a pivot point and moving said plurality of anodes with respect to said cathode, drive means engaging said follower means for moving said follower means to position a selected one of said plurality of anodes diametrically opposite the filament of said cathode, means for moving said drive means, bearing means for supporting said mount means, said mount means including sector having said plurality of anodes mounted on the circumferential portion thereof and the narrow section of said sector forming an annulus which is fitted on said bearing means for rotatable motion thereabout, and follower means including a spur gear mounted on said bearing means and non-rotatably linked with said annulus, whereby said mount means are rotated with said spur gear upon said drive means moving said spur gear.
Claim 3
Dependent Claim
17 words
An X-ray tube as described in claim 1, wherein said spur gear and said annulus are integral.
Claim 4
Dependent Claim
31 words
An X-ray tube as described in claim 1, wherein a portion of said annulus forms said spur gear by a portion of said annulus having said spur gear teeth formed thereon.
Claim 5
Dependent Claim
23 words
An X-ray tube as described in claim 1, wherein said drive means is a worm gear in meshing engagement with said spur gear.
Claim 6
Dependent Claim
121 words
An X-ray tube as described in claim 4, wherein said X-ray tube includes a cap attached to the end of said X-ray tube adjacent said plurality of anodes and having at least one chamber formed therein to house said worm gear and a bellows sealed vacuum-tight to said sector at one end and sealed vacuum-tight to the inner face of said X-ray tube, said means for moving said drive means is a spindle non-rotatably connected to one end of said worm gear and extending from said worm gear through an extension of said chamber to the exterior of said cap, to provide means for rotating said worm gear from outside said X-ray tube and maintaining a vacuum within said X-ray tube.
Claim 7
Dependent Claim
148 words
An X-ray tube as described in claim 5, wherein said cap has provided therein additional chambers to form an inlet port and outlet port for cooling fluid therein, said inlet port and said outlet port being separate and each extending integrally from the outside of said cap to the interior of said X-ray tube, and a feed conduit is connected at one end to said inlet port at the end opening into the interior of said X-ray tube and said feed conduit extends to the back of said plurality of anodes, whereby cooling fluid is introduced through said inlet port and said feed conduit to the back of the spot on said plurality of anodes being bombarded by electrons from said cathode and said cooling fluid is carried away from said X-ray tube through said outlet port in said cap for localized cooling of said plurality of anodes.
References Cited (Backward Citations)
DE591005C
Cited
US3646380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |