Patent US3183446A successfully refreshed from Google Patents.
US3183446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signal comparator
Assignee: Weston Instruments Inc
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Filing: 1962-03-15
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Granted: 1965-05-11
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Expires: 1982-03-15
Abstract
No abstract record available.
Inventors
- 👤 Peter L Richman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A PRECISION COMPARISON DEVICE FOR COMPARING AN OSCILLATORY VOLTAGE WITH A DIRECT-CURRENT REFERENCE VOLTAGE, SAID DEVICE COMPRISING IN COMBINATION: MEANS FOR PROVIDING TO A SUMMING JUNCTION A FIRST WAVETRAIN, SAID FIRST WAVETRAIN HAVING AN AMPLITUDE WHICH IS AN ATTENUATED SUM OF SAID VOLTAGES AND BEING LIMITED WITHIN A PREDETERMINED VALUE AT LEAST ONE ONE SIDE OF A FIXED REFERENCE PLANE POTENTIAL COMMON TO BOTH OF SAID VOLTAGE, SAMPLING MEANS FOR ALTERNATELY SAMPLING SAID FIRST WAVETRAIN ONE SAID SUMMING JUNCTION AND SAID FIXED REFERENCE PLANE POTENTIAL SO AS TO PROVIDE A SECOND WAVETRAIN HAVING ALTERNATING PORTIONS THEREOF DERIVED RESPECTIVELY FROM SAID FIRST WAVETRAIN AND SAID FIXED REFERENCE PLANE POTENTIAL, AND SAID SAMPLING MEANS BEING DISCONNECTED FROM SAID SUMMING JUNCTION WHEN SAMPLING SAID PLANAR POTENTIAL, ANY DIFFERENCE BETWEEN THE PEAK VALUE OF A PORTION DERIVED FROM SAID FIRST WAVETRAIN AND THE VALUE OF AN ADJACENT PORTION DERIVED FROM SAID FIXED REFERENCE PLANE POTENTIAL BEING PROPORTIONAL TO A CORRESPONDING DIFFERENCE BETWEEN THE PEAK VALUE OF SAID OSCILLATORY VOLTAGE AND THE VALUE OF SAID REFERENCE VOLTAGE.
Claim 2
Dependent Claim
172 words
A PRECISION COMPARISON DEVICE FOR COMPARING AN OSCILLATORY VOLTAGE WITH A DIRECT-CURRENT REFERENCE VOLTAGE, SAID DEVICE COMPRISING IN COMBINATION: MEANS FOR PROVIDING TO A SUMMING JUNCTION A FIRST WAVETRAIN, SAID FIRST WAVETRAIN HAVING AN AMPLITUDE WHICH IS AN ATTENUATED SUM OF SAID VOLTAGES AND BEING LIMITED WITHIN A PREDETERMINED VALUE AT LEAST ONE ONE SIDE OF A FIXED REFERENCE PLANE POTENTIAL COMMON TO BOTH OF SAID VOLTAGE, SAMPLING MEANS FOR ALTERNATELY SAMPLING SAID FIRST WAVETRAIN ONE SAID SUMMING JUNCTION AND SAID FIXED REFERENCE PLANE POTENTIAL SO AS TO PROVIDE A SECOND WAVETRAIN HAVING ALTERNATING PORTIONS THEREOF DERIVED RESPECTIVELY FROM SAID FIRST WAVETRAIN AND SAID FIXED REFERENCE PLANE POTENTIAL, AND SAID SAMPLING MEANS BEING DISCONNECTED FROM SAID SUMMING JUNCTION WHEN SAMPLING SAID PLANAR POTENTIAL, ANY DIFFERENCE BETWEEN THE PEAK VALUE OF A PORTION DERIVED FROM SAID FIRST WAVETRAIN AND THE VALUE OF AN ADJACENT PORTION DERIVED FROM SAID FIXED REFERENCE PLANE POTENTIAL BEING PROPORTIONAL TO A CORRESPONDING DIFFERENCE BETWEEN THE PEAK VALUE OF SAID OSCILLATORY VOLTAGE AND THE VALUE OF SAID REFERENCE VOLTAGE.
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) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |