US3383522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Undervoltage sensing circuit
Assignee: Westinghouse Electric Corp
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Filing: 1965-08-30
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Granted: 1968-05-14
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Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 Otto L Apfelbeck
- 👤 Norman G Eversole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:30
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/32; H02H3/34; H02H3/353; H02H3/24; H02H3/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN UNDERVOLTAGE SENSING CIRCUIT FOR A THREE PHASE LINE COMPRISING THREE RESISTANCE VOLTAGE DIVIDERS Y CONNECTED TO THE THREE PHASE LINES WITH A FLOATING COMMON TERMINAL, AN AND CIRCUIT HAVING THREE DIODES CONNECTED IN RESPECTIVE PATHS BETWEEN A DC SOURCE AND A GROUND TERMINAL, MEANS CONNECTING AN INTERMEDIATE JUNCTION OF EACH OF SAID VOLTAGE DIVIDERS TO THE RESPECTIVE DIODE PATHS IN SAID AND CIRCUIT SO AS NORMALLY TO BIAS SAID DIODES TO
Claim 2
Dependent Claim
72 words
AN UNDERVOLTAGE SENSING CIRCUIT FOR A THREE PHASE LINE COMPRISING THREE RESISTANCE VOLTAGE DIVIDERS Y CONNECTED TO THE THREE PHASE LINES WITH A FLOATING COMMON TERMINAL, AN AND CIRCUIT HAVING THREE DIODES CONNECTED IN RESPECTIVE PATHS BETWEEN A DC SOURCE AND A GROUND TERMINAL, MEANS CONNECTING AN INTERMEDIATE JUNCTION OF EACH OF SAID VOLTAGE DIVIDERS TO THE RESPECTIVE DIODE PATHS IN SAID AND CIRCUIT SO AS NORMALLY TO BIAS SAID DIODES TO
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |