Patent US3559050A successfully refreshed from Google Patents.
US3559050A
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US
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Motion detector with two separate windings and circuit interconnecting the windings
Assignee: ExxonMobil Upstream Research Co
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Filing: 1968-09-09
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Granted: 1971-01-26
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Expires: 1988-09-09
Abstract
Abstract A VELOCITY-SENSITIVE GEOPHONE IS PROVIDED WITH TWO SEPARATE WINDINGS ON THE SAME COIL FORM. THE OUTPUT SIGNAL PRODUCED BY ONE WINDING IS COUPLED TO THE OTHER THROUGH AN ELECTRICAL CIRCUIT WHICH AMPLIFIES THE SIGNAL AND ADJUSTS THE PHASE THEREOF. WHEN THE SIGNAL APPLIED TO THE SECOND WINDING IS IN PHASE WITH THE OUTPUT SIGNAL OF THE FIRST WINDING, THE DEVICE BEHAVES AS AN ACCELEROMETER, BUT IT BEHAVES AS A VERY LOW-FREQUENCY-SENSITIVE GEOPHONE WHEN THE SIGNALS ARE 90* OUT OF PHASE.
Inventors
- 👤 Joseph F Mifsud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:58
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/11; Y; Y10; Y10S; Y10S367/00; Y10S367/905
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |