Patent US3243699A successfully refreshed from Google Patents.
US3243699A
Expired / Lapsed
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Measuring set with compensation for standard attenuator calibration errors
Assignee: AT&T Inc
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Filing: 1961-05-05
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Granted: 1966-03-29
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Kummer Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2608
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN AN ELECTRIC MEASURING CIRCUIT WHEREIN A FIRST IMPEDANCE ELEMENT IS ADJUSTED IN STEPS TO PRODUCE A PREDETERMINED METER INDICATION AND THE MEASUREMENT RESULT IS OBTAINED FROM CALIBRATED INDICATING MEANS COUPLED TO SAID ELEMENT AND HAVING CALIBRATION ERRORS OF KNOWN MAGNITUDES, THE IMPROVEMENT WHICH COMPRISES A SECOND IMPEDANCE ELEMENT ALSO ADJUSTABLE IN STEPS IN CO-OPERATION WITH SAID FIRST ELEMENT, MEANS CONNECTING SAID SECOND ELEMENT IN CIRCUIT WITH SAID METER, AND THE IMPEDANCE OF SAID SECOND ELEMENT IN EACH OF ITS STEPS PRODUCING A DEVIATION IN THE OPERATION OF SAID METER TO OFFSET THE EFFECT OF SAID CALIBRATION ERRORS.
Claim 2
Dependent Claim
98 words
IN AN ELECTRIC MEASURING CIRCUIT WHEREIN A FIRST IMPEDANCE ELEMENT IS ADJUSTED IN STEPS TO PRODUCE A PREDETERMINED METER INDICATION AND THE MEASUREMENT RESULT IS OBTAINED FROM CALIBRATED INDICATING MEANS COUPLED TO SAID ELEMENT AND HAVING CALIBRATION ERRORS OF KNOWN MAGNITUDES, THE IMPROVEMENT WHICH COMPRISES A SECOND IMPEDANCE ELEMENT ALSO ADJUSTABLE IN STEPS IN CO-OPERATION WITH SAID FIRST ELEMENT, MEANS CONNECTING SAID SECOND ELEMENT IN CIRCUIT WITH SAID METER, AND THE IMPEDANCE OF SAID SECOND ELEMENT IN EACH OF ITS STEPS PRODUCING A DEVIATION IN THE OPERATION OF SAID METER TO OFFSET THE EFFECT OF SAID CALIBRATION ERRORS.
References Cited (Backward Citations)
US2047782A
Cited
US2324215A
Cited
US2685063A
Cited
US2697203A
Cited
US2755436A
Cited
US2951200A
Cited
GB779046A
Cited
US3005156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |