US3567982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device anode fin having heat distortion preventive means incorporated therein
Assignee: GTE Sylvania Inc
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Filing: 1968-12-23
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Granted: 1971-03-02
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Expires: 1988-12-23
Abstract
Abstract Heat distortion preventive means in the form of expansion openings are provided in the leading edge of anode fins for increased stability during operation and longer life expectancy.
Inventors
- 👤 Cyril Droppa
- 👤 Charles C Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:15
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0013
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
In an electron discharge device having a cathode and at least one grid; an anode surrounding said cathode and said grid; and a fin formed to project inwardly of said anode to a point closer to said cathode than any part of said anode, the improvement comprising: heat distortion preventive means incorporated in said fin.
Claim 2
Dependent Claim
55 words
In an electron discharge device having a cathode and at least one grid; an anode surrounding said cathode and said grid; and a fin formed to project inwardly of said anode to a point closer to said cathode than any part of said anode, the improvement comprising: heat distortion preventive means incorporated in said fin.
Claim 3
Dependent Claim
27 words
The device of claim 1 wherein said heat distortion preventive means comprises a plurality of expansion openings formed in the edge of said fin facing said cathode.
Claim 4
Dependent Claim
15 words
The device of claim 2 wherein said openings are configured as substantially V-shaped cutout areas.
Claim 5
Dependent Claim
13 words
The device of claim 2 wherein said expansion openings are substantially rectangular slots.
Claim 6
Dependent Claim
23 words
The device of claim 4 wherein said slots are three in number and are substantially equidistantly spaced along said edge of said fin.
Claim 7
Dependent Claim
17 words
The device of claim 2 wherein said expansion openings extend less than the width of said fin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |