Patent US4295077A successfully refreshed from Google Patents.
US4295077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circumferentially apertured cylindrical grid for electron tube
Assignee: Burle Technologies Inc
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Filing: 1980-02-14
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Granted: 1981-10-13
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Expires: 2000-02-14
Abstract
Abstract An improved high power electron tube has at least one grid electrode. The grid electrode is formed from a one piece cylindrical member, closed at one end, having an outside diameter, D. The cylindrical member has a plurality of arcuate, circumferentially elongated apertures extending therethrough. Each of the apertures has a length x and a width y wherein the length x is greater than width y, and wherein the length x is not greater than 0.55 times the diameter, D, of the electrode. The width y, of each of the apertures is not greater than 0.1 times the diameter D, of the electrode.
Inventors
- 👤 Don R. Carter
- 👤 Claude E. Doner
- 👤 Fred G. Hammersand
- 👤 Joseph R. Tomcavage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:19
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
In a high power electron tube having a cathode, a cylindrical anode circumscribing said cathode and at least one tubular electrode disposed between said cathode and said anode, said electrode being formed from a cylindrical member closed at one end, said member having an outside diameter D, said member further having a plurality of first apertures extending therethrough, each of said first apertures having a length x and a width y, the improvement wherein said electrode comprises: spurious oscillation control means including said first apertures, wherein said first apertures are circumferentially elongated, the length x, of said first apertures being greater than the width y, and wherein the length x of said first apertures is not greater than 0.55 times the diameter D, of said one electrode.
Claim 2
Dependent Claim
127 words
In a high power electron tube having a cathode, a cylindrical anode circumscribing said cathode and at least one tubular electrode disposed between said cathode and said anode, said electrode being formed from a cylindrical member closed at one end, said member having an outside diameter D, said member further having a plurality of first apertures extending therethrough, each of said first apertures having a length x and a width y, the improvement wherein said electrode comprises: spurious oscillation control means including said first apertures, wherein said first apertures are circumferentially elongated, the length x, of said first apertures being greater than the width y, and wherein the length x of said first apertures is not greater than 0.55 times the diameter D, of said one electrode.
Claim 3
Dependent Claim
22 words
The tube as in claim 1 wherein said first apertures are aligned to form a plurality of circumferential rows and longitudinal columns.
Claim 4
Dependent Claim
50 words
The tube as in claim 1 further including a second tubular electrode in spaced, coaxial, nested, nonabutting, insulated relationship with said one tubular electrode, said second electrode being formed from a cylindrical member having a plurality of arcuate, second apertures radially aligned with said first apertures of said one electrode.
Claim 5
Dependent Claim
19 words
The tube as in claim 3 wherein said second electrode is disposed between said one electrode and said anode.
Claim 6
Dependent Claim
27 words
The tube as in claim 1 wherein the width, y, of said first apertures is not greater than 0.1 times the diameter D, of said one electrode.
Claim 7
Dependent Claim
78 words
In a high power electron tube having a cathode, an anode and at least one tubular electrode disposed between said cathode and said anode, said tubular electrode being closed at one end and having a plurality of apertures extending through the tubular portion thereof, the improvement comprising the apertures in said tubular electrode being circumferentially elongated, the length of said apertures being not greater than 0.55 times the diameter of said tubular electrode whereby spurious oscillations are controlled.
Claim 8
Dependent Claim
78 words
In a high power electron tube having a cathode, an anode and at least one tubular electrode disposed between said cathode and said anode, said tubular electrode being closed at one end and having a plurality of apertures extending through the tubular portion thereof, the improvement comprising the apertures in said tubular electrode being circumferentially elongated, the length of said apertures being not greater than 0.55 times the diameter of said tubular electrode whereby spurious oscillations are controlled.
Claim 9
Dependent Claim
37 words
The tube as defined in claim 6 including a second tubular electrode nested in spaced relationship with said one tubular electrode, said second tubular electrode having elongated apertures aligned with the apertures in said one tubular electrode.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |