US4060761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular magnetic field sensor with means to rectify the sensed signal
Assignee: Boeing North American Inc
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Filing: 1976-11-11
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Granted: 1977-11-29
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Expires: 1996-11-11
Abstract
Abstract A magnetic tube is periodically saturated in the circumferential direction such that voltages are induced, in circumferential windings, from flux along the length of the magnetic tube, produced by an external field, immediately before and immediately after each occurrence of saturation.
Inventors
- 👤 Melvin H. Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:43
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01R33/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
Magnetic sensing apparatus comprising, in combination: a tubular length of magnetic material; a first winding wound from inside to outside the tubular material; a second winding wound around the circumference of the tubular material; excitation means for applying an excitation signal to one of said windings; a volt second integrator means, connected to said excitation means; logic means, connected to the excitation means and to said volt second integrator means, for providing control signals, rectifier means, including control input means, connected to the other of said windings; and means connecting said control signals of said logic means to said control input means of said rectifier means for controlling the operation thereof to provide output sense signals indicative of magnetic field strength and direction in the vicinity of said magnetic material.
Claim 2
Dependent Claim
130 words
Magnetic sensing apparatus comprising, in combination: a tubular length of magnetic material; a first winding wound from inside to outside the tubular material; a second winding wound around the circumference of the tubular material; excitation means for applying an excitation signal to one of said windings; a volt second integrator means, connected to said excitation means; logic means, connected to the excitation means and to said volt second integrator means, for providing control signals, rectifier means, including control input means, connected to the other of said windings; and means connecting said control signals of said logic means to said control input means of said rectifier means for controlling the operation thereof to provide output sense signals indicative of magnetic field strength and direction in the vicinity of said magnetic material.
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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |