US3136944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total field magnetometer having series connected inductance elements for substantial removal of even harmonics
Assignee: Individual
•
Filing: 1945-08-06
•
Granted: 1964-06-09
•
Expires: 1965-08-06
Abstract
No abstract record available.
Inventors
- 👤 Everett M Hafner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
IN COMBINATION IN A TOTAL FIELD MAGNETOMETER OF THE CHARACTER DESCRIBED, THREE PAIRS OF MUTUALLY PERPENDICULAR INDUCTANCE ELEMENTS DISPOSED WITH THE ELEMENTS OF EACH PAIR MUTUALLY SPACED AND CONNECTED IN SERIES OPPOSITION, MEANS PROVIDING SINUSOIDAL EXCITATIONS FOR SAID INDUCTANCES IN SERIES CONNECTED RELATIONSHIP THERETHROUGH, AND MEANS CONNECTED THEREWITH TO PROVIDE AN OUTPUT INDICATION CORRELATIVE WITH A REDUCTION IN THE APPARENT INDUCTANCE THERETHROUGH, THE ELECTRICAL CONNECTION OF SAID PAIR OF INDUCTANCES BEING OF A CHARACTER ADAPTED TO SUBSTANTIALLY REMOVE EVEN HARMONIC FREQUENCY COMPONENTS IN SAID OUTPUT AND TO PROVIDE A SERIES ADDITIVE OUTPUT VALUE SUBSTANTIALLY PROPORTIONAL TO THE SCALAR VALUE OF THE EXTERNAL FIELD WHEN THE ELEMENTS ARE EXCITED BY THE SINUSOIDAL EXCITATION MEANS THEREOF.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |