US3168679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intensity control compensation circuit for use in a cathode ray oscilloscope
Assignee: Tektronix Inc
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Filing: 1961-05-08
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Granted: 1965-02-02
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 John R Kobbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
AN ELECTRICAL CONTROL VOLTAGE HAVING INTERNAL REDISPLAY DEVICE A CATHODE AND A CONTROL GRID, SAID CIRCUIT COMPRISING: A SOURCE OF UNREGULATED VOLTAGE HAVING INTERNAL RESISTANCE, MEANS INCLUDING A SERIES RESISTANCE CIRCUIT HAVING A PLURALITY OF RESISTORS IN SERIES WITH EACH OTHER AND WITH SAID SOURCE FOR APPLYING DIFFERENT VOLTAGES FROM SAID SOURCE TO SAID CATHODE AND SAID GRID, AND MEANS FOR VARYING TH CONTROL GRID VOLTAGE AND FOR MAINTAINING THE CATHODE VOLTAGE SUBSTANTIALLY CONSTANT IN SPITE OF VARIATIONS OF THE VOLTAGE OF SAID VOLTAGE SOURCE DUE TO VARIATIONS OF THE VOLTAGE OF SAID THROUGH THE INTERNAL RESISTANCE OF SAID SOURCE TO THUS CHANGE THE INTENSITY OF THE LIGHT IMAGE FORMED BY THE ELECTRON BEAM EMITTED BY SAID CATHODE WITHOUT SUBSTANTIALLY AFFECTING OTHER OPERATING CHARACTERISTICS OF SAID DISPLAY DEVICE, THE LAST NAMED MEANS INCLUDING MEANS FOR VARYING THE VALUE OF RESISTANCE OF ONE OF SAID RESISTORS OF SAID
Claim 2
Dependent Claim
147 words
AN ELECTRICAL CONTROL VOLTAGE HAVING INTERNAL REDISPLAY DEVICE A CATHODE AND A CONTROL GRID, SAID CIRCUIT COMPRISING: A SOURCE OF UNREGULATED VOLTAGE HAVING INTERNAL RESISTANCE, MEANS INCLUDING A SERIES RESISTANCE CIRCUIT HAVING A PLURALITY OF RESISTORS IN SERIES WITH EACH OTHER AND WITH SAID SOURCE FOR APPLYING DIFFERENT VOLTAGES FROM SAID SOURCE TO SAID CATHODE AND SAID GRID, AND MEANS FOR VARYING TH CONTROL GRID VOLTAGE AND FOR MAINTAINING THE CATHODE VOLTAGE SUBSTANTIALLY CONSTANT IN SPITE OF VARIATIONS OF THE VOLTAGE OF SAID VOLTAGE SOURCE DUE TO VARIATIONS OF THE VOLTAGE OF SAID THROUGH THE INTERNAL RESISTANCE OF SAID SOURCE TO THUS CHANGE THE INTENSITY OF THE LIGHT IMAGE FORMED BY THE ELECTRON BEAM EMITTED BY SAID CATHODE WITHOUT SUBSTANTIALLY AFFECTING OTHER OPERATING CHARACTERISTICS OF SAID DISPLAY DEVICE, THE LAST NAMED MEANS INCLUDING MEANS FOR VARYING THE VALUE OF RESISTANCE OF ONE OF SAID RESISTORS OF SAID
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |