Patent US4191973A successfully refreshed from Google Patents.
US4191973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielding means for television picture tube electrical _feed-through receptacles
Assignee: Zenith Electronics LLC
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Filing: 1978-07-24
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Granted: 1980-03-04
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Expires: 1998-07-24
Abstract
Abstract A television cathode ray picture tube having a glass envelope including a funnel and a faceplate generates X-radiation internally and incidental to its operation. The funnel has a wall in which is sealingly embedded open-side-out a cup-like high-voltage receptacle having an inwardly turning annular lip for detachably engaging a mating high voltage electrical connector. An improved means for enhancing the X-radiation-inhibiting characteristics of the receptacle is depicted. The improved means comprises a cover of radiation-resistant material retained against the annular lip effective to close the opening of said receptacle whereby the shielding characteristics of the receptacle are enhanced by the cover.
Inventors
- 👤 William J. Szydlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:38
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/92; H01J29/925
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
In a television cathode ray picture tube having a glass envelope including a funnel and a faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is sealingly embedded open-side-out a cup-like receptacle having an inwardly turning annular lip for detachably engaging a mating electrical connector, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacle comprising a cover of radiation-resistant material retained against said annular lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
Claim 2
Dependent Claim
101 words
In a television cathode ray picture tube having a glass envelope including a funnel and a faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is sealingly embedded open-side-out a cup-like receptacle having an inwardly turning annular lip for detachably engaging a mating electrical connector, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacle comprising a cover of radiation-resistant material retained against said annular lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
Claim 3
Dependent Claim
111 words
In a television cathode ray picture tube having a glass envelope including a funnel and faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is sealingly embedded open-side-out a cup-like receptacle having an inwardly turning annular lip for detachably engaging a mating high-voltage connector, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacle comprising a dish-like cover of radiation-resistant material of substantially the same diameter as said receptacle and retained open-side-out against said annular lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
Claim 4
Dependent Claim
111 words
In a television cathode ray picture tube having a glass envelope including a funnel and faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is sealingly embedded open-side-out a cup-like receptacle having an inwardly turning annular lip for detachably engaging a mating high-voltage connector, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacle comprising a dish-like cover of radiation-resistant material of substantially the same diameter as said receptacle and retained open-side-out against said annular lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
Claim 5
Dependent Claim
138 words
In a television cathode ray picture tube having a glass envelope including a funnel and a faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is embedded open-side-out a cup-like high-voltage anode receptacle having an inwardly turning annular lip for detachably engaging a mating high-voltage connector having metal legs spring-biased outwardly, said legs including feet for captivation beneath said lip, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacles comprising a dish-like cover suitably perforated for the passage of said legs, said cover being comprised of a radiation-resistant material of substantially the same diameter as said receptacle and retained against said lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
Claim 6
Dependent Claim
138 words
In a television cathode ray picture tube having a glass envelope including a funnel and a faceplate, said tube generating X-radiation internally and incidental to its operation, said envelope having a wall in which is embedded open-side-out a cup-like high-voltage anode receptacle having an inwardly turning annular lip for detachably engaging a mating high-voltage connector having metal legs spring-biased outwardly, said legs including feet for captivation beneath said lip, an improved shielding means for enhancing the X-radiation-inhibiting characteristics of said receptacles comprising a dish-like cover suitably perforated for the passage of said legs, said cover being comprised of a radiation-resistant material of substantially the same diameter as said receptacle and retained against said lip in a manner effective to close the opening of said cup-like receptacle whereby the shielding characteristics of said receptacle are enhanced by said cover.
References Cited (Backward Citations)
US2499834A
Cited
US3600620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |