Patent US3277367A successfully refreshed from Google Patents.
US3277367A
Expired / Lapsed
US
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D.c. measuring circuit including electro-magnetic means for converting d.c. input toamplified a.c. signal
Assignee: INSTR FABRIEK EN HANDEL VOORHE
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Filing: 1962-05-18
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Granted: 1966-10-04
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 Petersen Berthus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:20
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/18; G01R17/00; G01R17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A DIRECT CURRENT MEASURING CIRCUIT WHICH IS FREE FROM ZERO SHIFT, A DEVICE FOR CONVERTING A DIRECT CURRENT INTO AN A.C. SIGNAL OF LARGER POWER COMPRISING, IN COMBINATION, A COIL WHICH IS MOVABLY MOUNTED AND WHICH CARRIES THE DIRECT CURRENT, AN A.C. SIGNAL GENERATOR WHICH IS ACTUATED BY MECHANICAL OSCILLATION OF THE COIL TO GENERATE AN A.C. SIGNAL WHOSE AMPITUDE IS PROPORTIONAL TO THE AMPLITUDE OF SUCH OSCILLATION, AND MEANS FOR PRODUCING A MAGNETIC FIELD INTERSECTION THE COIL OF CONSTANT AMPLITUDE AND PERIODICALLY RESERVING POLARITY, AT A CONSTANT FREQUENCY LOW ENOUGH TO CAUSE THE COIL TO OCILLATE WITH AN AMPLITUDE PROPORTIONAL TO THE DIRECT CURRENT IN THE COIL AND TO CAUSE THE SIGNAL GENERATOR TO GENERATE AN A.C. SIGNAL OF CONSTANT FREQUENCY WHOSE AMPLITUDE IS PROPORTIONAL TO THE DIRECT CURRENT IN THE COIL
Claim 2
Dependent Claim
134 words
IN A DIRECT CURRENT MEASURING CIRCUIT WHICH IS FREE FROM ZERO SHIFT, A DEVICE FOR CONVERTING A DIRECT CURRENT INTO AN A.C. SIGNAL OF LARGER POWER COMPRISING, IN COMBINATION, A COIL WHICH IS MOVABLY MOUNTED AND WHICH CARRIES THE DIRECT CURRENT, AN A.C. SIGNAL GENERATOR WHICH IS ACTUATED BY MECHANICAL OSCILLATION OF THE COIL TO GENERATE AN A.C. SIGNAL WHOSE AMPITUDE IS PROPORTIONAL TO THE AMPLITUDE OF SUCH OSCILLATION, AND MEANS FOR PRODUCING A MAGNETIC FIELD INTERSECTION THE COIL OF CONSTANT AMPLITUDE AND PERIODICALLY RESERVING POLARITY, AT A CONSTANT FREQUENCY LOW ENOUGH TO CAUSE THE COIL TO OCILLATE WITH AN AMPLITUDE PROPORTIONAL TO THE DIRECT CURRENT IN THE COIL AND TO CAUSE THE SIGNAL GENERATOR TO GENERATE AN A.C. SIGNAL OF CONSTANT FREQUENCY WHOSE AMPLITUDE IS PROPORTIONAL TO THE DIRECT CURRENT IN THE COIL
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |