US3389322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current chopper circuit
Assignee: Westinghouse Electric Corp
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Filing: 1965-07-28
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Granted: 1968-06-18
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 George S Smeltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H02M3/137
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
239 words
A DC CHOPPER CIRCUIT ARRANGEMENT HAVING INPUT TERMINALS CONNECTABLE TO A VARIABLE DC VOLTAGE SOURCE, SAID CHOPPER CIRCUIT ARRANGEMENT COMPRISING AN ENERGY STORAGE CIRCUIT AND AN ENERGY TRANSFER CIRCUIT, A STORAGE CAPACITOR CONNECTED IN SAID STORAGE CIRCUIT FOR ENERGIZATION FROM THE INPUT TERMINALS, A STORAGE SEMICONDUCTOR SWITCH CONNECTED IN SAID STORAGE CIRCUIT, AN INDUCTOR CONNECTED IN SAID STORAGE CIRCUIT FOR ENERGIZATION THROUGH SAID NECTED IN SAID STORAGE CIRCUIT, A CHARGING CAPACITOR CONINDUCTOR FROM SAID STORAGE CAPACITOR, SAID CHARGING CAPACITOR ALSO CONNECTED IN SAID TRANSFER CIRCUIT, ANOTHER INDUCTOR CONNECTED IN SAID TRANSFER CIRCUIT, AN OUTPUT CAPACITOR CONNECTED IN SAID TRANSFER CIRCUIT, A TRANSFER SEMICONDUCTOR SWITCH CONNECTED IN SAID TRANSFER CIRCUIT FOR TRANSMITTING DISCHARGE CURRENT FROM SAID CHARGING CAPACITOR THROUGH SAID OTHER INDUCTOR TO SAID OUTPUT CAPACITOR, MEANS FOR GENERATING GATING PULSES FOR SAID STORAGE SWITCH AT A CONSTANT FREQQUENCY, MEANS FOR APPLYING THE GATING PULSES TO SAID STORAGE SWITCH WHEN PREDETERMINED CIRCUIT CONDITIONS ARE MET SO AS REPEATEDLY TO CHARGE SAID CHARGING CAPACITOR, MEANS FOR GATING SAID TRANSFER SWITCH AT THE SAME CONSTANT FREQUENCY BUT IN PHASE DISPLACEMENT WITH THE FIRST MENTIONED PULSE GENERATING MEANS SO AS TO DISCHARGE SAID CHARGING CAPACITOR INTO SAID OUTPUT CAPACITOR AND TO REGULATE THE VOLTAGE ACROSS SAID OUTPUT CAPACITOR TO A SUBSTANTIALLY CONSTANT VALUE, SAID CHARGING CAPACITOR AND SAID INDUCTORS COOPERATING WITH SAID STORAGE AND OUTPUT CAPACITORS TO TURN OFF SAID STORAGE AND TRANSFER SWITCHES RESPECTIVELY AND REPEATEDLY BEFORE THE OTHER SWITCH IS GATED.
References Cited (Backward Citations)
US2719225A
Cited
US2730667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |