Patent US3820094A successfully refreshed from Google Patents.
US3820094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement-electric signal converter
Assignee: Fuji Electric Co Ltd
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Filing: 1973-04-11
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Granted: 1974-06-25
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Expires: 1993-04-11
Abstract
Abstract A displacement-electric signal converter comprises two annular magnetic bodies disposed concentrically, a magnetizing coil placed in an air gap formed between the two annular magnetic bodies, a short-circuiting ring freely rotatably provided on one of the two annular magnetic bodies, and at least one detecting coil provided on one of the two annular magnetic bodies for detecting magnetic fluxes flowing the interior of the annular magnetic body, an a.c. voltage being supplied to the magnetizing coil, the short-circuiting ring being rotated corresponding to a displacement to be measured, whereby an electric signal corresponding to the displacement to be measured can be obtained from the detecting coil.
Inventors
- 👤 M Mouri
- 👤 K Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:01
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2053; G01D5/206
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A displacement-electric signal converter comprising two annular magnetic bodies disposed substantially coaxially around a rotatable shaft, a yoke having a shielding plate provided in an air gap formed between said two annular magnetic bodies, a magnetizing coil wound around said yoke to be connected with an a. c. power source, at least one detecting element for detecting magnetic fluxes passing through one of said two annular magnetic bodies, and a short-circuiting ring interlinked with one part of one of said two annular magnetic bodies and coupled through an arm to said rotataBle shaft, said short-circuiting ring being rotated in correspondence with a displacement to be measured, whereby an output electric signal is obtained from said detecting element.
Claim 2
Dependent Claim
117 words
A displacement-electric signal converter comprising two annular magnetic bodies disposed substantially coaxially around a rotatable shaft, a yoke having a shielding plate provided in an air gap formed between said two annular magnetic bodies, a magnetizing coil wound around said yoke to be connected with an a. c. power source, at least one detecting element for detecting magnetic fluxes passing through one of said two annular magnetic bodies, and a short-circuiting ring interlinked with one part of one of said two annular magnetic bodies and coupled through an arm to said rotataBle shaft, said short-circuiting ring being rotated in correspondence with a displacement to be measured, whereby an output electric signal is obtained from said detecting element.
Claim 3
Dependent Claim
35 words
A displacement-electric signal converter as set forth in claim 1 wherein said two annular magnetic bodies having different diameters, and are arranged substantially concentrically in a horizontal plane around said rotatable shaft centrally located thereto.
Claim 4
Dependent Claim
33 words
A displacement-electric signal converter as set forth in claim 1 wherein said two annular magnetic bodies having the same diameter, and are arranged substantially coaxially around said rotatable shaft in an overlying manner.
Claim 5
Dependent Claim
121 words
A displacement-electric signal converter comprising two annular magnetic bodies disposed substantially coaxially around a rotatable shaft, a yoke having a shielding plate provided in an air gap formed between said two annular magnetic bodies, a magnetizing coil wound around said yoke to be connected with an a. c. power source, at least one detecting element for detecting magnetic fluxes passing through one of said two annular magnetic bodies, and a short-circuiting ring interlinked with one part of one of said two annular magnetic bodies, said magnetizing coil and said detecting element being coupled to said rotatable shaft through an arm and rotated in correspondence with a displacement to be measured, whereby an output electric signal is obtained from said detecting element.
Claim 6
Dependent Claim
121 words
A displacement-electric signal converter comprising two annular magnetic bodies disposed substantially coaxially around a rotatable shaft, a yoke having a shielding plate provided in an air gap formed between said two annular magnetic bodies, a magnetizing coil wound around said yoke to be connected with an a. c. power source, at least one detecting element for detecting magnetic fluxes passing through one of said two annular magnetic bodies, and a short-circuiting ring interlinked with one part of one of said two annular magnetic bodies, said magnetizing coil and said detecting element being coupled to said rotatable shaft through an arm and rotated in correspondence with a displacement to be measured, whereby an output electric signal is obtained from said detecting element.
Claim 7
Dependent Claim
34 words
A displacement-electric signal converter as set forth in claim 4 wherein said two annular magnetic bodies having different diameters, and are arranged substantially concentrically in a horizontal plane around said rotatable shaft centrally located.
Claim 8
Dependent Claim
33 words
A displacement-electric signal converter as set forth in claim 4 wherein said two annular magnetic bodies having the same diameter, and are arranged substantially coaxially around said rotatable shaft in an overlying manner.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |