US3242352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chopper circuits
Assignee: Siemens Mobility Ltd
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Filing: 1962-07-10
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Granted: 1966-03-22
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Long Brian Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02M; H02M1/00; H02M1/06; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A DIRECT CURRENT PULSE MODULATION SWITCHING CIRCUIT COMPRISING TWO DIRECT CURRENT INPUT TERMINALS AND A LOAD CONNECTED THERETO, A FIRST PATH FROM A SAID TERMINAL TO THE LOAD INCLUDING AN INDUCTANCE AND A CONTROLLED RECTIFIER, A SECOND PATH CONNECTED ACROSS SAID CONTROLLED RECTIFIER AND INCLUDING IN SERIES A COMMUTATING CAPACITOR AND A SECOND CONTROLLED RECTIFIER, A THIRD PATH CONNECTED ACROSS SAID SECOND MENTIONED CONTROLLED RECTIFIER AND INCLUDING RECTIFYING MEANS POLED IN THE REVERSE DIRECTION TO SAID FIRST AND SECOND CONTROLLED RECTIFIER OSCILLATORY CIRCUIT MEANS COMPRISING SAID COMMUTATING CAPACITOR, SAID SECOND CONTROLLED RECTIFIER AND SAID INDUCTANCE FOR PROVIDING A SUBSTANTIALLY UNDAMPED OSCILLATION HAVING A PEAK VOLTAGE VALUE AND OPERATIVE WHEN SAID SECOND CONTROLLED RECTIFIER IS TRIGGERED TO PLACE A CHARGE EQUAL TO SAID PEAK VOLTAGE VALUE ON SAID COMMUTATING CAPACITOR, AND BLOCKING CIRCUIT MEANS FOR HOLDING SAID CHARGE ON SAID CAPACITOR.
Claim 2
Dependent Claim
140 words
A DIRECT CURRENT PULSE MODULATION SWITCHING CIRCUIT COMPRISING TWO DIRECT CURRENT INPUT TERMINALS AND A LOAD CONNECTED THERETO, A FIRST PATH FROM A SAID TERMINAL TO THE LOAD INCLUDING AN INDUCTANCE AND A CONTROLLED RECTIFIER, A SECOND PATH CONNECTED ACROSS SAID CONTROLLED RECTIFIER AND INCLUDING IN SERIES A COMMUTATING CAPACITOR AND A SECOND CONTROLLED RECTIFIER, A THIRD PATH CONNECTED ACROSS SAID SECOND MENTIONED CONTROLLED RECTIFIER AND INCLUDING RECTIFYING MEANS POLED IN THE REVERSE DIRECTION TO SAID FIRST AND SECOND CONTROLLED RECTIFIER OSCILLATORY CIRCUIT MEANS COMPRISING SAID COMMUTATING CAPACITOR, SAID SECOND CONTROLLED RECTIFIER AND SAID INDUCTANCE FOR PROVIDING A SUBSTANTIALLY UNDAMPED OSCILLATION HAVING A PEAK VOLTAGE VALUE AND OPERATIVE WHEN SAID SECOND CONTROLLED RECTIFIER IS TRIGGERED TO PLACE A CHARGE EQUAL TO SAID PEAK VOLTAGE VALUE ON SAID COMMUTATING CAPACITOR, AND BLOCKING CIRCUIT MEANS FOR HOLDING SAID CHARGE ON SAID CAPACITOR.
References Cited (Backward Citations)
US3074008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |