US4064412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube base
Assignee: GTE Sylvania Inc
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Filing: 1976-07-02
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Granted: 1977-12-20
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Expires: 1996-07-02
Abstract
Abstract A base for a cathode ray tube includes at least one tube pin isolating means associated therewith to provide arc prevention between adjacent tube pins which can have up to a 12 KV potential difference therebetween.
Inventors
- 👤 Alfred D. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:29
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A base for a cathode ray tube comprising: a substantially flat, circular rim having a given diameter; a plurality of tube pin receiving apertures extending through said rim, said apertures being spaced inwardly from the outer circumference of said rim and being annularly arrayed; a hollow, substantially centrally located crown positioned on said rim and projecting therefrom adapted to receive the terminus of an exhaust tubulation; and at least one tube pin isolating means associated with at least one of said tube pin receiving apertures; said isolating means comprising an elongated, circumferential wall extending outwardly from said rim and forming an integral extension with the wall of said crown and being substantially the same height as said crown, and further having a first diameter substantially larger than the diameter of said tube pin extending substantially the full height of said wall; and a second diameter and a third diameter concentric with said first diameter forming a circular slot about said first diameter, said slot having a height substantially less than the height of said wall.
Claim 2
Dependent Claim
175 words
A base for a cathode ray tube comprising: a substantially flat, circular rim having a given diameter; a plurality of tube pin receiving apertures extending through said rim, said apertures being spaced inwardly from the outer circumference of said rim and being annularly arrayed; a hollow, substantially centrally located crown positioned on said rim and projecting therefrom adapted to receive the terminus of an exhaust tubulation; and at least one tube pin isolating means associated with at least one of said tube pin receiving apertures; said isolating means comprising an elongated, circumferential wall extending outwardly from said rim and forming an integral extension with the wall of said crown and being substantially the same height as said crown, and further having a first diameter substantially larger than the diameter of said tube pin extending substantially the full height of said wall; and a second diameter and a third diameter concentric with said first diameter forming a circular slot about said first diameter, said slot having a height substantially less than the height of said wall.
Claim 3
Dependent Claim
23 words
The base of claim 1 wherein said tube pin isolating means is formed to associate with two of said tube pin receiving apertures.
Claim 4
Dependent Claim
75 words
The base of claim 1 wherein said base includes, in combination therewith, a connector having a female contacting portion for engaging a tube pin, said female portion being surrounded by an electrically insulating shaft having an outside diameter substantially matching said first diameter and having a length less than said height of said wall, the distal portion of said insulating shaft being provided with a protruding, circular lip formed for intimate engagement with said slot.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |