Patent US7403470B2 successfully refreshed from Google Patents.
US3202871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state proportional power modulator
Assignee: Individual
•
Filing: 1960-07-22
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Granted: 1965-08-24
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Balakrishna R Shelar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:02
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/041; H05B39/042; Y; Y02; Y02B; Y02B20/00; Y10; Y10S; Y10S315/00; Y10S315/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
MEANS FOR CONTROLLING THE CURRENT FLOW FROM A SOURCE OF ALTERNATING CURRENT THROUGH A LOAD, SAID MEANS COM PRISING: A FIRST CONTROLLED RECTIFER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, SAID CATHODE BEING CONNECTED WITH ONE SAID OF SAID SOURCE AND SAID ANODE BEING CONNECTED TO SAID LOAD; A MAGNETIC AMPLIFIER INCLUDING A SATURDABLE MAGNETIC CORE, A GATE WINDING ONE SAID CORE CONNECTED BETWEEN SAID CORE, AND A TERITARY WINDING ON SAOD CORE WINDING ON SAID CORE, AND A TERTIARY WINDING ON SAID CORE HAVING A CLOSED, RELATIVELY LOW RESISTANCE PATH TO PROVIDE LINEAR RELATION BETWEEN CONTROL CURRENT AND LOAD VOLTAGE; A SECOND GATE WINDING ON SAID CORE; A SECOND CONTROLLED RECITFIER HAVING AN ANODE, CATHODE AND A GATE ELECTRODE; MEANS CONNECTING THE SECOND GATE WINDING BETWEEN THE ANODE AND GATE ELECTRODE OF SAID SECOND RECTIFIER; THE CATHODE OF THE FIRST RECTIFIER BEING CONNECTED TO THE ANODE OF THE SECOND FECTIFIER AND VICE VERSA; AND MEANS TO APPLY DIRECT CURRENT TO ONE OF SAID CONTROL WINDINGS.
Claim 2
Dependent Claim
168 words
MEANS FOR CONTROLLING THE CURRENT FLOW FROM A SOURCE OF ALTERNATING CURRENT THROUGH A LOAD, SAID MEANS COM PRISING: A FIRST CONTROLLED RECTIFER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, SAID CATHODE BEING CONNECTED WITH ONE SAID OF SAID SOURCE AND SAID ANODE BEING CONNECTED TO SAID LOAD; A MAGNETIC AMPLIFIER INCLUDING A SATURDABLE MAGNETIC CORE, A GATE WINDING ONE SAID CORE CONNECTED BETWEEN SAID CORE, AND A TERITARY WINDING ON SAOD CORE WINDING ON SAID CORE, AND A TERTIARY WINDING ON SAID CORE HAVING A CLOSED, RELATIVELY LOW RESISTANCE PATH TO PROVIDE LINEAR RELATION BETWEEN CONTROL CURRENT AND LOAD VOLTAGE; A SECOND GATE WINDING ON SAID CORE; A SECOND CONTROLLED RECITFIER HAVING AN ANODE, CATHODE AND A GATE ELECTRODE; MEANS CONNECTING THE SECOND GATE WINDING BETWEEN THE ANODE AND GATE ELECTRODE OF SAID SECOND RECTIFIER; THE CATHODE OF THE FIRST RECTIFIER BEING CONNECTED TO THE ANODE OF THE SECOND FECTIFIER AND VICE VERSA; AND MEANS TO APPLY DIRECT CURRENT TO ONE OF SAID CONTROL WINDINGS.
References Cited (Backward Citations)
US2151753A
Cited
US2552203A
Cited
US2779897A
Cited
US2807753A
Cited
GB792916A
Cited
US2880374A
Cited
US3102229A
Cited
US2966614A
Cited
US2920240A
Cited
US2987666A
Cited
US2998547A
Cited
US3129381A
Cited
US3137823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |