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Patent US3390329A successfully refreshed from Google Patents.
US3390329A
Expired / Lapsed
US
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Simplified apparatus for measuring primary electrical quantities
Assignee: Solid State Systems Inc
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Filing: 1964-04-30
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Granted: 1968-06-25
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Gewirtz Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:11
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A CIRCUIT FOR MEASURING SELECTIVELY A VARIETY OF PRIMARY ELECTRICAL QUANTITIES, COMPRISING A PLURALITY OF DIVIDER NETWORKS, A DC AMPLIFIER, A CURRENT MEASURING METER AND MEANS IN SERIES CIRCUIT WITH SAID METER AND SAID AMPLIFIER FOR NEUTRALIZING DRIFT IN THE SENSITIVITY OF SAID AMPLIFIER, TERMINAL MEANS FOR APPLYING DIFFERENT ELECTRICAL QUANTITIES TO SAID DIVIDER NETWORKS, A PLURALITY OF RATIO VOLTAGE DIVIDERS RESPECTIVELY CONNECTED TO THE OUTPUTS OF SAID DIVIDER NETWORKS, AND SWITCH MEANS BETWEEN THE RESPECTIVE RATIO VOLTAGE DIVIDERS AND SAID DC AMPLIFIER FOR SELECTIVELY CONNECTING EACH OF SAID DIVIDER NETWORKS TO SAID AMPLIFIER, SO THAT THE METER MEASURES AN ELECTRICAL QUANTITY APPLIED TO A SELECTED NETWORK.
Claim 2
Dependent Claim
107 words
A CIRCUIT FOR MEASURING SELECTIVELY A VARIETY OF PRIMARY ELECTRICAL QUANTITIES, COMPRISING A PLURALITY OF DIVIDER NETWORKS, A DC AMPLIFIER, A CURRENT MEASURING METER AND MEANS IN SERIES CIRCUIT WITH SAID METER AND SAID AMPLIFIER FOR NEUTRALIZING DRIFT IN THE SENSITIVITY OF SAID AMPLIFIER, TERMINAL MEANS FOR APPLYING DIFFERENT ELECTRICAL QUANTITIES TO SAID DIVIDER NETWORKS, A PLURALITY OF RATIO VOLTAGE DIVIDERS RESPECTIVELY CONNECTED TO THE OUTPUTS OF SAID DIVIDER NETWORKS, AND SWITCH MEANS BETWEEN THE RESPECTIVE RATIO VOLTAGE DIVIDERS AND SAID DC AMPLIFIER FOR SELECTIVELY CONNECTING EACH OF SAID DIVIDER NETWORKS TO SAID AMPLIFIER, SO THAT THE METER MEASURES AN ELECTRICAL QUANTITY APPLIED TO A SELECTED NETWORK.
References Cited (Backward Citations)
US2558282A
Cited
US2806208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |