Patent US3218540A successfully refreshed from Google Patents.
US3218540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current supply apparatus
Assignee: North Electric Co
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Filing: 1960-11-01
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Granted: 1965-11-16
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Stuart P Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:01
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1552
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
APPARATUS FOR SUPPLYING RECTIFIED CURRENT FROM AN ALTERNATING CURRENT SUPPLY SOURCE TO A LOAD CIRCUIT COMPRISING A FIRST BRIDGE RECTIFIER CIRCUIT INCLUDING AT LEAST ONE SWITCHING MEMBER CONNECTED IN ONE ARM OF SAID BRIDGE CIRCUIT FOR EFFECTING CONDUCTIVITY AND NONCONDUCTIVITY OF CURRENT FROM SAID SOURCE OVER SAID RECTIFIER CIRCUIT TO SAID LOAD CIRCUIT, MEANS COMPRISING A SECOND RECTIFIER FOR INTERMITTENTLY SUPPLYING A FIRST CONTROL CURRENT FROM SAID SOURCE TO SAID SWITCHING MEMBER IN SAID FIRST BRIDGE RECTIFIER CIRCUIT INCLUDING A CONTROL MEMBER FOR VARYING THE CONDUCTIVITY OF SAID SECOND RECTIFIER, DIFFERENT VALUES OF SAID FIRST CONTROL CURRENT BEING EFFECTIVE TO VARY THE TIME OF CONDUC-
Claim 2
Dependent Claim
105 words
APPARATUS FOR SUPPLYING RECTIFIED CURRENT FROM AN ALTERNATING CURRENT SUPPLY SOURCE TO A LOAD CIRCUIT COMPRISING A FIRST BRIDGE RECTIFIER CIRCUIT INCLUDING AT LEAST ONE SWITCHING MEMBER CONNECTED IN ONE ARM OF SAID BRIDGE CIRCUIT FOR EFFECTING CONDUCTIVITY AND NONCONDUCTIVITY OF CURRENT FROM SAID SOURCE OVER SAID RECTIFIER CIRCUIT TO SAID LOAD CIRCUIT, MEANS COMPRISING A SECOND RECTIFIER FOR INTERMITTENTLY SUPPLYING A FIRST CONTROL CURRENT FROM SAID SOURCE TO SAID SWITCHING MEMBER IN SAID FIRST BRIDGE RECTIFIER CIRCUIT INCLUDING A CONTROL MEMBER FOR VARYING THE CONDUCTIVITY OF SAID SECOND RECTIFIER, DIFFERENT VALUES OF SAID FIRST CONTROL CURRENT BEING EFFECTIVE TO VARY THE TIME OF CONDUC-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |