US3286122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic degaussing circuit
Assignee: Admiral Corp
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Filing: 1964-08-31
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Granted: 1966-11-15
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Dietch Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:23
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/29
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
IN A COLOR TELEVISION RECEIVER HAVING A PICTURE TUBE INCLUDING A SHADOW MASK SUSCEPTIBLE TO EXTERNAL MAGNETIC FIELDS AND A PAIR OF DEMAGNETIZING COILS MOUNTED ADJACENT TO THE PICTURE TUBE, CIRCUIT MEANS FOR DEVELOPINNG A HIGH AMPLITUDE, DECAYING DEMAGNETIZING CURRENT IN SAID COILS COMPRISING; A POWER SUPPLY HAVING A HIGH INRUSH CURRENT CHARACTERISTIC; A THERMISTOR HAVING AN INVERSE-TEMPERATURE CHARACTERISTIC SERIALLY CONNECTED BETWEEN A SOURCE OF A.C. POTENTIAL AND SAID POWER SUPPLY; SWITCH MEANS FOR PLACING SAID COILS IN PARALLEL WITH SAID THERMISTOR WHEN SAID THERMISTOR IS BELOW A PREDETERMINED TEMPERATURE RANGE AND FOR DISCONNECTING SAID COILS WHEN SAID THERMISTOR IS ABOVE SAID PREDETERMINED TEMPERATURE RANGE; AND A CAPACITOR CONNECTED ACROSS SAID COILS FOR CYCLICALLY DISSIPATING ANY RESIDUAL ENERGY THEREIN UPON DISCONNECTION OF SAID COILS BY SAID SWITCH MEANS, SAID CIRCUIT MEANS COOPERATING TO PROVIDE A HIGH AMPLITUDE DEMAGNETIZING CURRENT FOR SAID COILS.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |