US3112425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective circuit for cathode ray tube
Assignee: Telefunken AG
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Filing: 1960-02-17
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Granted: 1963-11-26
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Expires: 1980-02-17
Abstract
No abstract record available.
Inventors
- 👤 Theisen Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:03
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A CONTROL CIRCUIT FOR A CATHODE RAY TUBE HAVING A SCREEN AND AT LEAST ONE CONTROL ELEMENT FOR CONTROLLING THE INTENSITY OF THE CATHODE RAY BEAM AND HAVING AN ACCELERATING ANODE CAPACITANCE CHARGED TO A HIGH VOLTAGE BY A POWER SOURCE DURING OPERATION, AN IMPROVED CIRCUIT FOR DISCHARGING SAID CAPACITANCE THROUGH THE BEAM WHEN THE SOURCE IS CUT OFF, SAID CIRCUIT COMPRISING: CONTROL MEANS CONNECTED TO SAID CONTROL ELEMENT FOR ADJUSTING THE OPERATING BIAS LEVEL THEREON, AND VOLTAGE TRANSLATING NETWORK MEANS CONNECTED BETWEEN SAID CONTROL ELEMENT AND SAID POWER SOURCE FOR PRODUCING A POSITIVE TRANSIENT
Claim 2
Dependent Claim
96 words
IN A CONTROL CIRCUIT FOR A CATHODE RAY TUBE HAVING A SCREEN AND AT LEAST ONE CONTROL ELEMENT FOR CONTROLLING THE INTENSITY OF THE CATHODE RAY BEAM AND HAVING AN ACCELERATING ANODE CAPACITANCE CHARGED TO A HIGH VOLTAGE BY A POWER SOURCE DURING OPERATION, AN IMPROVED CIRCUIT FOR DISCHARGING SAID CAPACITANCE THROUGH THE BEAM WHEN THE SOURCE IS CUT OFF, SAID CIRCUIT COMPRISING: CONTROL MEANS CONNECTED TO SAID CONTROL ELEMENT FOR ADJUSTING THE OPERATING BIAS LEVEL THEREON, AND VOLTAGE TRANSLATING NETWORK MEANS CONNECTED BETWEEN SAID CONTROL ELEMENT AND SAID POWER SOURCE FOR PRODUCING A POSITIVE TRANSIENT
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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |