US3337744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply with overload and under-voltage protection circuit
Assignee: HLF CORP
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Filing: 1964-06-01
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Granted: 1967-08-22
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Emery G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569; G05F1/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A POWER SUPPLY, A PLURALITY OF POWER SUPPLY UNITS, EACH UNIT HAVING AN INPUT CONNECTED WITH A SOURCE OF UNREGULATED VOLTAGE, A REGULATOR CIRCUIT HAVING AN OUTPUT CONNECTED WITH A LOAD, A CONTROL CIRCUIT FOR INTERRUPTING CURRENT THROUGH THE REGULATOR TO THE LOAD, MEANS FOR SENSING AN ELECTRICAL CONDITION OF THE LOAD, MEANS RESPONSIVE TO AN UNDESIRABLE ELECTRICAL CONDITION FOR ACTUATING SAID CONTROL CIRCUIT, SAID SENSING MEANS AND SAID ACTUATING MEANS FOR EACH UNIT BEING TRANSFORMER COUPLED, EACH TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, AND A COMMON CORE FOR SAID TRANSFORMER WINDINGS FOR INTERCONNECTING THE ACTUATING MEANS FOR EACH UNIT.
Claim 2
Dependent Claim
101 words
IN A POWER SUPPLY, A PLURALITY OF POWER SUPPLY UNITS, EACH UNIT HAVING AN INPUT CONNECTED WITH A SOURCE OF UNREGULATED VOLTAGE, A REGULATOR CIRCUIT HAVING AN OUTPUT CONNECTED WITH A LOAD, A CONTROL CIRCUIT FOR INTERRUPTING CURRENT THROUGH THE REGULATOR TO THE LOAD, MEANS FOR SENSING AN ELECTRICAL CONDITION OF THE LOAD, MEANS RESPONSIVE TO AN UNDESIRABLE ELECTRICAL CONDITION FOR ACTUATING SAID CONTROL CIRCUIT, SAID SENSING MEANS AND SAID ACTUATING MEANS FOR EACH UNIT BEING TRANSFORMER COUPLED, EACH TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, AND A COMMON CORE FOR SAID TRANSFORMER WINDINGS FOR INTERCONNECTING THE ACTUATING MEANS FOR EACH UNIT.
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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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |