US3882348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube with internal cylindrical resistor between high voltage connection and electron gun
Assignee: US Philips Corp
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Filing: 1974-01-16
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Granted: 1975-05-06
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Expires: 1994-01-16
Abstract
Abstract Cathode-ray tube comprising an electric resistor between high voltage connection and electron gun so as to attenuate current peaks in the case of high voltage breakdowns. The resistor includes resistance wire wound around a ceramic cylinder coaxially mounted on the electron gun.
Inventors
- 👤 Cornelis Johannes He Paridaens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/96
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A cathode-ray tube comprising an evacuated envelope, means disposed within said envelope and including a final anode to produce at least one electron beam, an electrically conductive layer on an innEr surface of the envelope, an electric resistor which connects the conductive layer to the final anode, said electric resistor being a mono-layer winding of resistance wire on the outside of on a mainly cylindrical hollow body spaced apart from said envelope and having an axis which is coaxial with the main axis of the tube, said cylindrical body being a material of a sufficiently low resistance to prevent surface charging.
Claim 2
Dependent Claim
101 words
A cathode-ray tube comprising an evacuated envelope, means disposed within said envelope and including a final anode to produce at least one electron beam, an electrically conductive layer on an innEr surface of the envelope, an electric resistor which connects the conductive layer to the final anode, said electric resistor being a mono-layer winding of resistance wire on the outside of on a mainly cylindrical hollow body spaced apart from said envelope and having an axis which is coaxial with the main axis of the tube, said cylindrical body being a material of a sufficiently low resistance to prevent surface charging.
Claim 3
Dependent Claim
17 words
A cathode-ray tube as claimed in claim 1 wherein said body is supported on said final anode.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |