US3344282A
Expired / Lapsed
US
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Voltage level sensing means for standby power supply systems
Assignee: Allis Chalmers Corp
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Filing: 1964-04-06
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Granted: 1967-09-26
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Baude John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/062; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y04; Y04S; Y04S20/00; Y04S20/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A STANDBY POWER SUPPLY SYSTEM FOR PRODUCING AC POWER FOR A LOAD UPON FAILURE OF A PRIMARY AC POWER SOURCE, MEANS FOR SENSING THE LEVEL OF SAID AC POWER SOURCE TO EFFECT DISCONNECTION OF THE PRIMARY AC SOURCE FROM THE LOAD AND ENERGIZATION OF THE LOAD FROM A STANDBY POWER SUPPLY, SAID MEANS COMPRISING: MEANS FOR PRODUCING AN ALTERNATING REFERENCE SIGNAL OF PRESELECTED AMPLITUDE AND WAVE SHAPE HAVING A PRESELECTED RELATIONSHIP TO THE AMPLITUDE AND WAVE SHAPE OF THE AC POWER SOURCE, MEANS CONNECTED TO THE PRIMARY AC SOURCE AND CONNECTED TO RECEIVE THE REFERENCE SIGNAL FOR PRODUCING A COMPARISON OUTPUT INDICATING THE INSTANTANEOUS RELATIVE AMPLITUDES OF THE PRIMARY AC SOURCE AND THE REFERENCE SIGNAL, AND MEANS RESPONSIVE TO THE COMPARISON OUTPUT FOR ENERGIZING THE LOAD FROM THE STANDBY POWER SOURCE WHEN THE COMPARISON OUTPUT DEVIATES FROM A PRESELECTED LEVEL.
Claim 2
Dependent Claim
141 words
IN A STANDBY POWER SUPPLY SYSTEM FOR PRODUCING AC POWER FOR A LOAD UPON FAILURE OF A PRIMARY AC POWER SOURCE, MEANS FOR SENSING THE LEVEL OF SAID AC POWER SOURCE TO EFFECT DISCONNECTION OF THE PRIMARY AC SOURCE FROM THE LOAD AND ENERGIZATION OF THE LOAD FROM A STANDBY POWER SUPPLY, SAID MEANS COMPRISING: MEANS FOR PRODUCING AN ALTERNATING REFERENCE SIGNAL OF PRESELECTED AMPLITUDE AND WAVE SHAPE HAVING A PRESELECTED RELATIONSHIP TO THE AMPLITUDE AND WAVE SHAPE OF THE AC POWER SOURCE, MEANS CONNECTED TO THE PRIMARY AC SOURCE AND CONNECTED TO RECEIVE THE REFERENCE SIGNAL FOR PRODUCING A COMPARISON OUTPUT INDICATING THE INSTANTANEOUS RELATIVE AMPLITUDES OF THE PRIMARY AC SOURCE AND THE REFERENCE SIGNAL, AND MEANS RESPONSIVE TO THE COMPARISON OUTPUT FOR ENERGIZING THE LOAD FROM THE STANDBY POWER SOURCE WHEN THE COMPARISON OUTPUT DEVIATES FROM A PRESELECTED LEVEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |