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US3600620A
Expired / Lapsed
US
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Anode button for preventing leakage of x-radiation
Assignee: GTE Sylvania Inc
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Filing: 1970-07-13
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Granted: 1971-08-17
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Expires: 1990-07-13
Abstract
Abstract A substantially hollow anode button formed for sealing in a glass wall of a cathode-ray tube envelope has a radiation shield positioned therein. The shield has a bottom and an upstanding circumferential wall which extends to a height just less than the interior height of the button. The shield is free to move within the cup to allow easy exit of cleaning or rinsing fluids used in tube processing.
Inventors
- 👤 Edward C Slick
- 👤 Floyd H West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:02
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/92; H01J29/925
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
An anode button for use as a sealed-in member in the wall of a cathode-ray tube capable of generating x-radiation comprising: a substantially frustoconical body having a circumferential sidewall and substantially parallel spaced-apart top and bottom portions contiguous with said sidewall to form a hollow unit; said button having a longitudinal axis passing substantially through the center of said top and bottom portions and said top portion having therein a geometrically configured aperture having a given area; said aperture being substantially symmetrically located with respect to said axis, and a radiation shield positioned within said body; said shield comprising a bottom having a circumferential sidewall therearound and an open top, the area of said top being greater than the area of said aperture.
Claim 2
Dependent Claim
123 words
An anode button for use as a sealed-in member in the wall of a cathode-ray tube capable of generating x-radiation comprising: a substantially frustoconical body having a circumferential sidewall and substantially parallel spaced-apart top and bottom portions contiguous with said sidewall to form a hollow unit; said button having a longitudinal axis passing substantially through the center of said top and bottom portions and said top portion having therein a geometrically configured aperture having a given area; said aperture being substantially symmetrically located with respect to said axis, and a radiation shield positioned within said body; said shield comprising a bottom having a circumferential sidewall therearound and an open top, the area of said top being greater than the area of said aperture.
Claim 3
Dependent Claim
21 words
The invention of claim 1 wherein said shield is loosely fitted within said body and is free to move small distances.
Claim 4
Dependent Claim
112 words
A cathode-ray tube envelope comprised of an electrically insulating material substantially impervious to the passage of x-radiation, said envelope having sealed in a wall thereof a hollow electrically conductive button having a bottom portion communicating with the interior of said envelope and a top portion communicating with the exterior of said envelope, said top and bottom portions being joined by a circumferential sidewall and said top portion having therein a geometrically configured aperture having a given area; and a radiation shield positioned within said body; said shield comprising a bottom having a circumferential sidewall therearound and an open top, the area of said top being greater than the area of said aperture.
Claim 5
Dependent Claim
112 words
A cathode-ray tube envelope comprised of an electrically insulating material substantially impervious to the passage of x-radiation, said envelope having sealed in a wall thereof a hollow electrically conductive button having a bottom portion communicating with the interior of said envelope and a top portion communicating with the exterior of said envelope, said top and bottom portions being joined by a circumferential sidewall and said top portion having therein a geometrically configured aperture having a given area; and a radiation shield positioned within said body; said shield comprising a bottom having a circumferential sidewall therearound and an open top, the area of said top being greater than the area of said aperture.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |