Patent US3659133A successfully refreshed from Google Patents.
US3659133A
Expired / Lapsed
US
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In-line type triple electron gun assembly
Assignee: Toshiba Corp
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Filing: 1970-10-14
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Granted: 1972-04-25
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Expires: 1990-10-14
Abstract
Abstract An in-line type triple electron gun assembly wherein there is provided a central electron gun member; there are disposed on both sides of the central electron gun member in the same plane a pair of electron gun members whose axis defines a prescribed angle of inclination to that of the central electron gun member; the first and second grid electrodes of each of the paired electron gun members consist of a substantially triangular plate electrode; the plate electrodes of each of the three electron gun members have an effective surface intersecting the axis of said each member at right angles; and each plate electrode is perforated with an electron beam hole coaxial with the axis of the electron gun member.
Inventors
- 👤 Asahide Tsuneta
- 👤 Yasuo Ohta
- 👤 Makoto Ikegaki
- 👤 Shinichi Sawagata
- 👤 Fumiyuki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82; H01J29/48; H01J29/50; H01J29/503
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
An in-line type triple electron gun assembly comprising a first electron gun member consisting of a cathode electrode and at least first to fifth grid electrodes arranged in turn ahead of the cathode electrode in the axial direction of said gun member, at least said third to fifth grid electrodes being cylindrical electrodes; second and third electron gun members positioned on both sides of the first electron gun member in the same plane with their axes inclined to that of the latter at a prescribed angle, said second and third electron gun members each containing first and second grid electrodes having a substantially triangular effective surface and a first fixing part integrally formed therewith substantially at right angles and third to fifth cylindrical electrodes having a second fixing part; and a plurality of support rods made of insulating material which are arranged outside of the electrodes of the first to third electron gun members so as to fix said electron gun members in a prescribed positional relationship through said first and second fixing parts.
Claim 2
Dependent Claim
174 words
An in-line type triple electron gun assembly comprising a first electron gun member consisting of a cathode electrode and at least first to fifth grid electrodes arranged in turn ahead of the cathode electrode in the axial direction of said gun member, at least said third to fifth grid electrodes being cylindrical electrodes; second and third electron gun members positioned on both sides of the first electron gun member in the same plane with their axes inclined to that of the latter at a prescribed angle, said second and third electron gun members each containing first and second grid electrodes having a substantially triangular effective surface and a first fixing part integrally formed therewith substantially at right angles and third to fifth cylindrical electrodes having a second fixing part; and a plurality of support rods made of insulating material which are arranged outside of the electrodes of the first to third electron gun members so as to fix said electron gun members in a prescribed positional relationship through said first and second fixing parts.
Claim 3
Dependent Claim
40 words
The electron gun assembly according to claim 1 wherein the cathode electrode of the second and third gun members is supported by a funnel shaped support member fixed to a plate support member disposed opposite to the first grid electrode.
Claim 4
Dependent Claim
52 words
The electron gun assembly according to claim 1 wherein the first and second plate grid electrodes included in each of the second and third electron gun members have at least one bead formed on the triangular effective surface and a shielding plate fitted to both oblique sides of said triangular effective surface.
Claim 5
Dependent Claim
23 words
The electron gun assembly according to claim 3 wherein the the triangular effective surface has a curved shielding plate mounted over the apex.
Claim 6
Dependent Claim
35 words
The electron gun assembly according to claim 1 wherein the first and second grid electrodes of the first electron gun member are disc grid electrodes having a plurality of fixing parts projecting from the periphery.
Claim 7
Dependent Claim
30 words
The electron gun assembly according to claim 1 wherein the first and second grid electrodes each have a projection formed on the effective surface, said projections exactly facing each other.
Claim 8
Dependent Claim
38 words
The electron gun assembly according to claim 1 wherein the first electron gun member consists of cylindrical electrodes having a smaller diameter than the third to fifth cylindrical grid electrodes of the second and third electron gun members.
Claim 9
Dependent Claim
58 words
The electron gun assembly according to claim 7 wherein the first and second grid electrodes of the first electron gun member each have a square effective surface provided with a projection at the center and fixing parts integrally formed with said effective surface substantially at right angles, said projections being so disposed as exactly to face each other.
References Cited (Backward Citations)
US3396297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |