Patent US3790836A successfully refreshed from Google Patents.
US3790836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling means for electrodes
Assignee: Varian Medical Systems Inc
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Filing: 1972-10-02
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Granted: 1974-02-05
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Expires: 1992-10-02
Abstract
Abstract An electron discharge device having a movable electrode within an evacuated envelope, and means comprising retractable elements associated with the envelope and movable into engagement with the electrode for providing a thermally conductive path for dissipation of heat from the electrode outside the envelope.
Inventors
- 👤 M Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:12
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
56 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, and heat-conductive means between said electrode and envelope for conducting heat from the electrode to the exterior of the envelope, said heat-conductive means being movable into and out of interconnection between the envelope and electrode during cycling of the device.
Claim 2
Dependent Claim
56 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, and heat-conductive means between said electrode and envelope for conducting heat from the electrode to the exterior of the envelope, said heat-conductive means being movable into and out of interconnection between the envelope and electrode during cycling of the device.
Claim 3
Dependent Claim
21 words
An electron discharge device as set forth in claim 1 wherein said movable heat-conductive means comprises a portion of the envelope.
Claim 4
Dependent Claim
20 words
An electron discharge device as set forth in claim 1 wherein said movable heat-conductive means is fixed to the electrode.
Claim 5
Dependent Claim
25 words
An electron discHarge device as set forth in claim 1 further comprising magnet means carried by said envelope adjacent said heat-conductive means for moving same.
Claim 6
Dependent Claim
48 words
An electron discharge device comprising an envelope comprising a dielectric portion and a heat-conductive portion, an electrode within the envelope, means for heating said electrode, and means for moving said heat-conductive portion of the envelope into and out of engagement with the electrode during cycling of the device.
Claim 7
Dependent Claim
48 words
An electron discharge device comprising an envelope comprising a dielectric portion and a heat-conductive portion, an electrode within the envelope, means for heating said electrode, and means for moving said heat-conductive portion of the envelope into and out of engagement with the electrode during cycling of the device.
Claim 8
Dependent Claim
31 words
An electron discharge device as set forth in claim 5 wherein said means comprises at least one magnet adjacent said heat-conductive portion for moving same toward or away from the electrode.
Claim 9
Dependent Claim
39 words
An electron discharge device as set forth in claim 5 wherein said heat-conductive portion of the envelope comprises at least one metal member attached to said dielectric portion of the envelope for movement toward and away from said electrode.
Claim 10
Dependent Claim
27 words
An electron discharge device as set forth in claim 7 wherein said heat-conductive metal member is a ring flexibly attached to the dielectric portion of the envelope.
Claim 11
Dependent Claim
37 words
An electron discharge device as set forth in claim 7 wherein said heat-conductive metal member further comprises a rod, and wherein said electrode has a recess in a surface thereof adapted to be engaged by said rod.
Claim 12
Dependent Claim
54 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, said electrode having a surface located adjacent a wall of the envelope, said wall of the envelope including heat-conductive means movable toward and away from said electrode and shaped for broad area surface heat-conductive engagement with said electrode.
Claim 13
Dependent Claim
54 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, said electrode having a surface located adjacent a wall of the envelope, said wall of the envelope including heat-conductive means movable toward and away from said electrode and shaped for broad area surface heat-conductive engagement with said electrode.
Claim 14
Dependent Claim
49 words
An electron discharge device as set forth in claim 10 wherein said surface of the electrode is substantially planar, and said heat-conductive means comprises a plurality of rings flexibly mounted in said envelope wall and simultaneously movable into and out of heat-conductive contact with said surface of the electrode.
Claim 15
Dependent Claim
31 words
An electron discharge device as set forth in claim 11 wherein magnet means is attached to the envelope adjacent said rings for controlling movement of the rings relative to the electrode.
Claim 16
Dependent Claim
60 words
An electron discharge device as set forth in claim 10 wherein said surface of the electrode is provided with a plurality of recesses, and said heat-conductive means comprises a plate flexibly mounted in said envelope wall and carrying on its inner surface a plurality of pins movable upon movement of the plate into engagement with the walls of said recesses.
Claim 17
Dependent Claim
36 words
An electron discharge device as set forth in claim 13 wherein magnet means is attached to the envelope adjacent said plate for controlling movement of the plate and consequently of the pins relative to the electrode.
Claim 18
Dependent Claim
54 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, said electrode having a surface located adjacent a wall of the envelope, said wall including heat-conductive means, and heat-conductive members carried by said electrode movable into and out of heat-conductive relation with the heat-conductive means of the wall.
Claim 19
Dependent Claim
54 words
An electron discharge device comprising an envelope containing an electrode and means for heating said electrode, said electrode having a surface located adjacent a wall of the envelope, said wall including heat-conductive means, and heat-conductive members carried by said electrode movable into and out of heat-conductive relation with the heat-conductive means of the wall.
Claim 20
Dependent Claim
20 words
An electron discharge device as set forth in claim 15 wherein said heat-conductive members on the electrode are flexible wires.
Claim 21
Dependent Claim
38 words
An electron discharge device as set forth in claim 16 wherein said wires have a flexibility such that they will be displaced by centrifugal force from said heat-conductive means in the envelope wall when the electrode is rotated.
Claim 22
Dependent Claim
46 words
An electron discharge device as set forth in claim 15 wherein said heat-conductive means in the wall includes a plate flexibly mounted in the wall, and magnet means is carried by said wall adjacent the plate for moving said plate with respect to said heat-conductive members.
Claim 23
Dependent Claim
21 words
An electron discharge device as set forth in claim 18 wherein said heat-conductive means comprises a plurality of wirelike metal elements.
Claim 24
Dependent Claim
66 words
An X-ray tube comprising an envelope, a rotaTable target supported in the envelope, a cathode in the envelope adjacent the target for heating the target, said envelope including a heat-conductive portion located in spaced adjacent relation to said target when the target is rotating and movable into engagement with said target when the target is stationary for conducting heat from the target externally of the tube.
Claim 25
Dependent Claim
66 words
An X-ray tube comprising an envelope, a rotaTable target supported in the envelope, a cathode in the envelope adjacent the target for heating the target, said envelope including a heat-conductive portion located in spaced adjacent relation to said target when the target is rotating and movable into engagement with said target when the target is stationary for conducting heat from the target externally of the tube.
References Cited (Backward Citations)
US3644769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |