Patent US3412309A successfully refreshed from Google Patents.
US3412309A
Expired / Lapsed
US
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Arrangement including a dc-ac converter with at least one controlled rectifier
Assignee: US Philips Corp
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Filing: 1966-12-28
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Granted: 1968-11-19
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Boonstra Lieuwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:59
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/516; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; H02M7/53; H02M7/537; H02M7/5383; H02M7/53846; H02M7/53854; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN ARRANGEMENT INCLUDING A DC-AC CONVERTER WITH AT LEAST ONE CONTROLLED RECTIFIER FOR CONVERTING THE VOLTAGE OF A DIRECT-CURRENT SOURCE INTO AN ALTERNATING VOLTAGE AND INCLUDING A GENERATOR FOR PRODUCING PULSES TO MAKE THE CONTROLLED RECTIFIER CONDUCTING AND INCLUDING AN INPUT FILTER WITH A SERIES-COMBINATION OF AN INDUCTOR AND A CAPACITOR, THE ENDS OF THIS SERIES COMBINATION BEING CONNECTED TO THE DIRECT CURRENT SOURCE, AND THE CONVERTER BEING CONNECTED IN SHUNT WITH THE CAPACITOR, THE SAID INDUCTOR HAVING A VALUE SUCH THAT, AS A RESULT OF AN INTERFERENCE WHICH KEEPS THE CONTROLLED RECITIFIER CONDUCTING, AN OSCILLATION IS PRODUCED SUCH THAT THE VOLTAGE ACROSS THE CAPACITOR PASSES THROUGH ZERO, THEREBY EXTINGUISHING THE CONTROLLED RECTIFIER DESPITE THE INTERFERENCE, A VOLTAGE BEING DERIVED FROM THE SAID OSCILLATOR AND PREVENTING THE PULSES OF THE GENERATOR CIRCUIT FROM REACHING THE RECTIFIER.
Claim 2
Dependent Claim
136 words
AN ARRANGEMENT INCLUDING A DC-AC CONVERTER WITH AT LEAST ONE CONTROLLED RECTIFIER FOR CONVERTING THE VOLTAGE OF A DIRECT-CURRENT SOURCE INTO AN ALTERNATING VOLTAGE AND INCLUDING A GENERATOR FOR PRODUCING PULSES TO MAKE THE CONTROLLED RECTIFIER CONDUCTING AND INCLUDING AN INPUT FILTER WITH A SERIES-COMBINATION OF AN INDUCTOR AND A CAPACITOR, THE ENDS OF THIS SERIES COMBINATION BEING CONNECTED TO THE DIRECT CURRENT SOURCE, AND THE CONVERTER BEING CONNECTED IN SHUNT WITH THE CAPACITOR, THE SAID INDUCTOR HAVING A VALUE SUCH THAT, AS A RESULT OF AN INTERFERENCE WHICH KEEPS THE CONTROLLED RECITIFIER CONDUCTING, AN OSCILLATION IS PRODUCED SUCH THAT THE VOLTAGE ACROSS THE CAPACITOR PASSES THROUGH ZERO, THEREBY EXTINGUISHING THE CONTROLLED RECTIFIER DESPITE THE INTERFERENCE, A VOLTAGE BEING DERIVED FROM THE SAID OSCILLATOR AND PREVENTING THE PULSES OF THE GENERATOR CIRCUIT FROM REACHING THE RECTIFIER.
References Cited (Backward Citations)
US3315146A
Cited
US3325716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |