US3076376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric measuring circuits
Assignee: Individual
•
Filing: 1961-06-27
•
Granted: 1963-02-05
•
Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Henry P Kalmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ELECTRIC CIRCUIT FOR USE IN MEASURING AN ELECTRICAL SIGNAL, SAID CIRCUIT COMPRISING, IN COMBINATION, AN ESSENTIALLY UNIDIRECTIONAL CONDUCTING ELECTRIC VALVE HAVING A NON-LINEAR VOLTAGE-CURRENT CHARACTERISTIC IN THE CONDUCTION RANGE, SAID VALVE HAVING SPACED ELECTRODES, IMPEDANCE MEANS CONNECTED IN SERIES CIRCUIT RELATION WITH SAID VALVE, ALTERNATING CURRENT GENERATING MEANS CONNECTED ACROSS THE SERIES CONNECTED VALVE AND IMPEDANCE MEANS AND APPLYING THERETO A RELATIVELY HIGH CARRIER FREQUENCY SQUARE WAVE MODULATED BY A RELATIVELY LOW FREQUENCY, MEANS ACTIVE ON SAID VALVE TO AFFECT THE CURRENT ESTABLISHED THEREIN BY SAID GENERATING MEANS TO PRODUCE A MEASURABLE SIGNAL, AND AMPLIFICATION MEANS DERIVING ITS CONTROL SIGNAL FROM SAID IMPEDANCE MEANS AND TUNED TO THE FUNDAMENTAL COMPONENT OF THE LOW FREQUENCY SQUARE WAVE MODULATION SIGNAL.
Claim 2
Dependent Claim
119 words
AN ELECTRIC CIRCUIT FOR USE IN MEASURING AN ELECTRICAL SIGNAL, SAID CIRCUIT COMPRISING, IN COMBINATION, AN ESSENTIALLY UNIDIRECTIONAL CONDUCTING ELECTRIC VALVE HAVING A NON-LINEAR VOLTAGE-CURRENT CHARACTERISTIC IN THE CONDUCTION RANGE, SAID VALVE HAVING SPACED ELECTRODES, IMPEDANCE MEANS CONNECTED IN SERIES CIRCUIT RELATION WITH SAID VALVE, ALTERNATING CURRENT GENERATING MEANS CONNECTED ACROSS THE SERIES CONNECTED VALVE AND IMPEDANCE MEANS AND APPLYING THERETO A RELATIVELY HIGH CARRIER FREQUENCY SQUARE WAVE MODULATED BY A RELATIVELY LOW FREQUENCY, MEANS ACTIVE ON SAID VALVE TO AFFECT THE CURRENT ESTABLISHED THEREIN BY SAID GENERATING MEANS TO PRODUCE A MEASURABLE SIGNAL, AND AMPLIFICATION MEANS DERIVING ITS CONTROL SIGNAL FROM SAID IMPEDANCE MEANS AND TUNED TO THE FUNDAMENTAL COMPONENT OF THE LOW FREQUENCY SQUARE WAVE MODULATION SIGNAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |