US3229150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flyback driven deflection circuit
Assignee: US Philips Corp
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Filing: 1962-08-06
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Granted: 1966-01-11
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Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Greep Leonardus Maria
- 👤 Poorter Teunis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:23
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/83; H03K4/84; H03K4/48; H03K4/60; H03K4/62; H03K4/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A CIRCUIT FOR PRODUCING A SAWTOOTH CURRENT HAVING A SWEEP PERIOD AND A FLYBACK PERIOD IN A FIRST INDUCTANCE, COMPRISING A SOURCE OF DIRECT VOLTAGE, IMPEDANCE MEANS, A CAPACITOR, MEANS FOR CONNECTING SAID IMPEDANCE MEANS AND SAID CAPACITOR IN A SERIES CIRCUIT ACROSS SAID VOLTAGE SOURCE, SWITCH MEANS, A SECOND INDUCTANCE CONNECTED IN SERIES WITH SAID SWITCH MEANS, MEANS FOR CLOSING SAID SWITCH MEANS DURING SAID FLYBACK PERIOD THEREBY TO PERIODICALLY DISCHARGE SAID CAPACITOR INTO SAID FIRST INDUCTANCE THROUGH A CURRENT PATH COMPRISING THE SERIES COMBINATION OF SAID SWITCH MEANS AND SAID SECOND INDUCTANCE, AND MEANS FOR MAINTAINING THE VOLTAGE ACROSS SAID FIRST INDUCTANCE SUBSTANTIALLY CONSTANT DURING SAID SWEEP PERIOD COMPRISING A RECTIFIER ELEMENT CONNECTED TO SAID FIRST INDUCTANCE AND MEANS FOR APPLYING A BIAS VOLTAGE TO SAID RECTIFIER, SAID RECTIFIER BEING POLED TO CONDUCT DURING SAID SWEEP PERIOD.
Claim 2
Dependent Claim
139 words
A CIRCUIT FOR PRODUCING A SAWTOOTH CURRENT HAVING A SWEEP PERIOD AND A FLYBACK PERIOD IN A FIRST INDUCTANCE, COMPRISING A SOURCE OF DIRECT VOLTAGE, IMPEDANCE MEANS, A CAPACITOR, MEANS FOR CONNECTING SAID IMPEDANCE MEANS AND SAID CAPACITOR IN A SERIES CIRCUIT ACROSS SAID VOLTAGE SOURCE, SWITCH MEANS, A SECOND INDUCTANCE CONNECTED IN SERIES WITH SAID SWITCH MEANS, MEANS FOR CLOSING SAID SWITCH MEANS DURING SAID FLYBACK PERIOD THEREBY TO PERIODICALLY DISCHARGE SAID CAPACITOR INTO SAID FIRST INDUCTANCE THROUGH A CURRENT PATH COMPRISING THE SERIES COMBINATION OF SAID SWITCH MEANS AND SAID SECOND INDUCTANCE, AND MEANS FOR MAINTAINING THE VOLTAGE ACROSS SAID FIRST INDUCTANCE SUBSTANTIALLY CONSTANT DURING SAID SWEEP PERIOD COMPRISING A RECTIFIER ELEMENT CONNECTED TO SAID FIRST INDUCTANCE AND MEANS FOR APPLYING A BIAS VOLTAGE TO SAID RECTIFIER, SAID RECTIFIER BEING POLED TO CONDUCT DURING SAID SWEEP PERIOD.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |