US3340420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube control circuitry utilizing two accelerating windings
Assignee: Stromberg Carlson Corp
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Filing: 1964-07-14
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Granted: 1967-09-05
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Expires: 1984-07-14
Abstract
No abstract record available.
Inventors
- 👤 Robert H Compton
- 👤 Omer F Hamann
- 👤 Roger G Steadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A CATHODE RAY TUBE HAVING A LONGITUDINAL AXIS, A HELICAL RESISTIVE ACCELERATING ELECTRODE MOUNTED WITHIN SAID TUBE FOR PROVIDING AN ELECTROSTATIC FIELD GENERALLY ORIENTED ALONG THE LENGTH OF SAID TUBE, A DC VOLTAGE SOURCE HAVING A FIRST AND SECOND TERMINAL, MEANS FOR COUPLING SAID FIRST TERMINAL TO ONE END OF SAID HELICAL RESISTIVE ACCELERATING ELECTRODE, MEANS FOR COUPLING SAID SECOND TERMINAL TO THE OTHER END OF SAID HELICAL RESISTIVE ACCELERATING ELECTRODE SO THAT A POTENTIAL GRADIENT IS SET UP INSIDE OF SAID TUBE SUBSTANTIALLY PARALLEL WITH THE LONGITUDINAL AXIS OF SAID TUBE, A RESISTIVE STABILIZING ELECTRODE ADJACENT WITH THE OUTSIDE SURFACE OF SAID TUBE FOR ESTABLISHING A VOLTAGE GRADIENT ON THE OUTSIDE SURFACE OF SAID TUBE SUBSTANTIALLY EQUAL TO THE VOLTAGE GRADIENT SET UP ON THE INSIDE OF SAID TUBE BY SAID HELICAL RESISTIVE ACCELERATING ELECTRODE, AND MEANS FOR APPLYING SUBSTANTIALLY THE SAME POTENTIAL ACROSS SAID STABILIZING ELECTRODE AS IS APPLIED ACROSS SAID ACCELERATING ELECTRODE BY SAID DC VOLTAGE SOURCE.
Claim 2
Dependent Claim
161 words
IN A CATHODE RAY TUBE HAVING A LONGITUDINAL AXIS, A HELICAL RESISTIVE ACCELERATING ELECTRODE MOUNTED WITHIN SAID TUBE FOR PROVIDING AN ELECTROSTATIC FIELD GENERALLY ORIENTED ALONG THE LENGTH OF SAID TUBE, A DC VOLTAGE SOURCE HAVING A FIRST AND SECOND TERMINAL, MEANS FOR COUPLING SAID FIRST TERMINAL TO ONE END OF SAID HELICAL RESISTIVE ACCELERATING ELECTRODE, MEANS FOR COUPLING SAID SECOND TERMINAL TO THE OTHER END OF SAID HELICAL RESISTIVE ACCELERATING ELECTRODE SO THAT A POTENTIAL GRADIENT IS SET UP INSIDE OF SAID TUBE SUBSTANTIALLY PARALLEL WITH THE LONGITUDINAL AXIS OF SAID TUBE, A RESISTIVE STABILIZING ELECTRODE ADJACENT WITH THE OUTSIDE SURFACE OF SAID TUBE FOR ESTABLISHING A VOLTAGE GRADIENT ON THE OUTSIDE SURFACE OF SAID TUBE SUBSTANTIALLY EQUAL TO THE VOLTAGE GRADIENT SET UP ON THE INSIDE OF SAID TUBE BY SAID HELICAL RESISTIVE ACCELERATING ELECTRODE, AND MEANS FOR APPLYING SUBSTANTIALLY THE SAME POTENTIAL ACROSS SAID STABILIZING ELECTRODE AS IS APPLIED ACROSS SAID ACCELERATING ELECTRODE BY SAID DC VOLTAGE SOURCE.
References Cited (Backward Citations)
US3143681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |