US3801844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor member for rotary magnetic position indicator
Assignee: Mercury Systems Inc
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Filing: 1972-12-01
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Granted: 1974-04-02
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Expires: 1992-12-01
Abstract
Abstract A rotor member for a rotary magnetic position indicator incorporating two abutting permanent magnets. The first permanent magnet is cylindrical and has oppositely polarized areas at the respective extremities of a diameter. The second permanent magnet has at least two polar projections joined by cylindrical surface portions, the projections being oppositely polarized. The magnets are oriented with the polarized areas and projections of the same polarity being generally axially aligned.
Inventors
- 👤 G Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; H02K37/14; G; G08; G08B; G08B5/00; G08B5/22; G08B5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A rotor member for a rotary magnetic position indicator, said rotor member having an axis and comprising a permanent magnet structure which includes a first permanent magnet section having a cylindrical outer surface coaxial with said axis, and a second permanent magnet section axially contiguous with said first section and having at least two polar projections joined by cylindrical suface portions coaxial with said axis, said first section having oppositely polarIzed areas at said outer surface thereof, said second section projections being oppositely polarized, said areas and projections of the same polarity being generally aaxially aligned, there being three of said polar projections, one of said projections having one polarity and having one extremity of said second section magnetic axis extending substantially through the center thereof, the other two of said projections having the opposite polarity and being spaced on opposite sides of the other extremity of said second section magnetic axis.
Claim 2
Dependent Claim
152 words
A rotor member for a rotary magnetic position indicator, said rotor member having an axis and comprising a permanent magnet structure which includes a first permanent magnet section having a cylindrical outer surface coaxial with said axis, and a second permanent magnet section axially contiguous with said first section and having at least two polar projections joined by cylindrical suface portions coaxial with said axis, said first section having oppositely polarIzed areas at said outer surface thereof, said second section projections being oppositely polarized, said areas and projections of the same polarity being generally aaxially aligned, there being three of said polar projections, one of said projections having one polarity and having one extremity of said second section magnetic axis extending substantially through the center thereof, the other two of said projections having the opposite polarity and being spaced on opposite sides of the other extremity of said second section magnetic axis.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |