Patent US3935498A successfully refreshed from Google Patents.
US3935498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron gun assembly
Assignee: RCA Licensing Corp
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Filing: 1973-02-14
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Granted: 1976-01-27
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Expires: 1993-02-14
Abstract
Abstract An electron gun assembly of the three gun, in-line type. The three guns each including a plurality of electrode elements are rigidly attached to four support rods or glass beads by a mounting means comprising four metal straps which connect each of the outer gun elements to two support rods and the center gun elements to all four support rods. A first group of four L-shaped metal tabs are imbedded in the ends of the support rods, and two mounting bars are each connected at both ends to two of the tabs for the purpose of making electrical connections to the gun heater elements. A second group of "U"-shaped metal tabs are also imbedded in the ends of the support rods to permit a mechanical connection of a stem component whereby the gun electrode elements are isolated from forces applied to the stem. A convergence assembly is self-registering with respect to the gun assembly by the alignment of precision holes in the base of the convergence assembly with cut-outs provided in a flange on the center gun electrode. A plurality of slots are provided in the wall of the convergence assembly which permit self-registering of pole piece elements positioned inside the assembly.
Inventors
- 👤 Frederick F. Doggett
- 👤 Leonard W. Jenne, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/50; H01J29/503; H01J29/82
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
283 words
In combination with three electron guns disposed such that the axes of said guns lie in the same plane: I. four support rods positioned around said guns in a spaced relationship; Ii. mounting strap means for connecting the center one of said three guns to all four of said support rods, and each of the outer two of said three guns to only two of said four support rods, said mounting strap means comprising a. a first mounting strap arrangement rigidly attached to the center gun on one side of said plane and having corresponding ends secured to a first pair of said support rods located on the same side of said plane; b. a second mounting strap arrangement rigidly attached to the center gun on the opposite side of said plane from the first strap arrangement and having corresponding ends secured to a second pair of said support rods located on said opposite side of said plane; c. a third mounting strap arrangement rigidly attached to one of the two outer guns and having an end thereof located on the one side of said plane and secured to one of the rods from said first pair and another end thereof located on the other side of said plane and secured to one of the rods of said second pair; and d. a fourth mounting strap arrangement rigidly attached to the other one of the two outer guns and having an end thereof located on the one side of said plane and secured to the other rod of said first pair and another end thereof located on the other side of said plane and secured to the other rod of said second pair.
Claim 2
Dependent Claim
283 words
In combination with three electron guns disposed such that the axes of said guns lie in the same plane: I. four support rods positioned around said guns in a spaced relationship; Ii. mounting strap means for connecting the center one of said three guns to all four of said support rods, and each of the outer two of said three guns to only two of said four support rods, said mounting strap means comprising a. a first mounting strap arrangement rigidly attached to the center gun on one side of said plane and having corresponding ends secured to a first pair of said support rods located on the same side of said plane; b. a second mounting strap arrangement rigidly attached to the center gun on the opposite side of said plane from the first strap arrangement and having corresponding ends secured to a second pair of said support rods located on said opposite side of said plane; c. a third mounting strap arrangement rigidly attached to one of the two outer guns and having an end thereof located on the one side of said plane and secured to one of the rods from said first pair and another end thereof located on the other side of said plane and secured to one of the rods of said second pair; and d. a fourth mounting strap arrangement rigidly attached to the other one of the two outer guns and having an end thereof located on the one side of said plane and secured to the other rod of said first pair and another end thereof located on the other side of said plane and secured to the other rod of said second pair.
Claim 3
Dependent Claim
211 words
In combination with a central electron gun and two outer electron guns in the neck of a cathode ray tube, said guns being disposed such that their longitudinal axes lie in a common plane, support means for said guns contained within said neck, said support means comprising: four support rods positioned in a spaced relationship around said guns, first and second ones of said rods being spaced on one side of said plane and third and fourth ones of said rods being spaced on the other side of said plane; and mounting strap means joined to said central electron gun and forming a rigid truss type structure including first and second mounting straps such that said gun constitutes the intersection of first, second, third and fourth truss members extending from said first, second, third and fourth support rods, respectively, said first mounting strap extending between said first and third rods so as to constitute a fifth truss member and said second mounting strap extending between said second and fourth rods so as to constitute a sixth truss member, said first and second mounting straps each intersecting said plane, each of said outer electron guns being rigidly connected to said first and second mounting straps constituting said fifth and sixth members, respectively.
Claim 4
Dependent Claim
211 words
In combination with a central electron gun and two outer electron guns in the neck of a cathode ray tube, said guns being disposed such that their longitudinal axes lie in a common plane, support means for said guns contained within said neck, said support means comprising: four support rods positioned in a spaced relationship around said guns, first and second ones of said rods being spaced on one side of said plane and third and fourth ones of said rods being spaced on the other side of said plane; and mounting strap means joined to said central electron gun and forming a rigid truss type structure including first and second mounting straps such that said gun constitutes the intersection of first, second, third and fourth truss members extending from said first, second, third and fourth support rods, respectively, said first mounting strap extending between said first and third rods so as to constitute a fifth truss member and said second mounting strap extending between said second and fourth rods so as to constitute a sixth truss member, said first and second mounting straps each intersecting said plane, each of said outer electron guns being rigidly connected to said first and second mounting straps constituting said fifth and sixth members, respectively.
Claim 5
Dependent Claim
17 words
The apparatus of claim 2 wherein said support rods are mounted substantially equidistantly from said central gun.
Claim 6
Dependent Claim
17 words
The apparatus of claim 3 wherein said support rods are mounted substantially equidistantly from said common plane.
Claim 7
Dependent Claim
221 words
In combination with a central electron gun and two outer electron guns in the neck of a cathode ray tube, said guns being disposed such that their longitudinal axes lie in a common plane, support means for said guns occupying a minimum amount of cross sectional area within said neck, said support means comprising: four support rods positioned in a spaced relationship around said guns, first and second ones of said rods being spaced on one side of said plane and third and fourth ones of said rods being spaced on the other side of said plane, each of said rods being spaced substantially equidistantly from the longitudinal axis of said central electron gun at a distance no greater than substantially the distance from the axis of said central gun to the outermost surface of either of said outer electron guns; and mounting strap means rigidly connecting said central electron gun to all of said four support rods, one of said outer electron guns to said first and third support rods, and the other of said outer electron guns to said second and fourth support rods, said mounting strap means being affixed to said central gun along a pair of diametrically opposed surface portions thereof and being affixed to each of said outer guns along a single surface portion thereof, respectively.
Claim 8
Dependent Claim
221 words
In combination with a central electron gun and two outer electron guns in the neck of a cathode ray tube, said guns being disposed such that their longitudinal axes lie in a common plane, support means for said guns occupying a minimum amount of cross sectional area within said neck, said support means comprising: four support rods positioned in a spaced relationship around said guns, first and second ones of said rods being spaced on one side of said plane and third and fourth ones of said rods being spaced on the other side of said plane, each of said rods being spaced substantially equidistantly from the longitudinal axis of said central electron gun at a distance no greater than substantially the distance from the axis of said central gun to the outermost surface of either of said outer electron guns; and mounting strap means rigidly connecting said central electron gun to all of said four support rods, one of said outer electron guns to said first and third support rods, and the other of said outer electron guns to said second and fourth support rods, said mounting strap means being affixed to said central gun along a pair of diametrically opposed surface portions thereof and being affixed to each of said outer guns along a single surface portion thereof, respectively.
Claim 9
Dependent Claim
44 words
The apparatus of claim 5 wherein each one of said pair of diametrically opposed surface portions is situated on a separate side, respectively, of said common plane and wherein said single surface portion of each of said outer guns, respectively, intersects said common plane.
Claim 10
Dependent Claim
22 words
The apparatus of claim 5 wherein said single surface portion of each of said outer guns, respectively, faces toward said central gun.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |