Patent US1452347A successfully refreshed from Google Patents.
Patent US3134057A successfully refreshed from Google Patents.
US3134057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic circuit for the deflection of flux leakage
Assignee: Nippon Steel Corp
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Filing: 1960-09-21
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Granted: 1964-05-19
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Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 Tsunoo Toshihiko
- 👤 Uruma Mitsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:47
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R2209/00; H04R2209/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A MAGNETIC CIRCUIT COMPRISING: AN AXIALLY POLARIZED CENTRAL MAGNET, INCLUDING FIRST AND SECOND END PORTIONS; A MAGNETIC POLE PIECE IN CONTACT WITH ONE END PORTION OF SAID CENTRAL MAGNET AND AXIALLY EXTENDING THEREFROM; A YOKE INCLUDING A CENTRAL PORTION IN CONTACT WITH THE SECOND END PORTION OF SAID CENTRAL MAGNET, A SIDE PORTION SPACED FROM AND EXTENDING PARALLEL TO SAID CENTRAL MAGNET AND SAID MAGNETIC POLE PIECE, AND A TOP PORTION EXTENDING LATERALLY TOWARD SAID MAGNETIC POLE PIECE TO PROVIDE AN ANNULAR GAP BETWEEN THE TOP PORTION OF SAID YOKE AND SAID MAGNETIC POLE PIECE; A SECOND MAGNET OF HIGH COERCIVITY AXIALLY DISPLACED FROM SAID MAGNETIC POLE PIECE TO PROVIDE A SECOND GAP BETWEEN SAID MAGNETIC POLE PIECE AND SAID SECOND MAGNET, SAID SECOND MAGNET BEING MAGNETICALLY POLARIZED WITH RESPECT TO THE POLARIZATION OF SAID FIRST MAGNET TO FORCE THE LEAKAGE FLUX IN SAID SECOND GAP FROM SAID CENTRAL MAGNET TO THE TOP PORTION OF SAID YOKE VIA SAID ANNULAR GAP.
Claim 2
Dependent Claim
161 words
A MAGNETIC CIRCUIT COMPRISING: AN AXIALLY POLARIZED CENTRAL MAGNET, INCLUDING FIRST AND SECOND END PORTIONS; A MAGNETIC POLE PIECE IN CONTACT WITH ONE END PORTION OF SAID CENTRAL MAGNET AND AXIALLY EXTENDING THEREFROM; A YOKE INCLUDING A CENTRAL PORTION IN CONTACT WITH THE SECOND END PORTION OF SAID CENTRAL MAGNET, A SIDE PORTION SPACED FROM AND EXTENDING PARALLEL TO SAID CENTRAL MAGNET AND SAID MAGNETIC POLE PIECE, AND A TOP PORTION EXTENDING LATERALLY TOWARD SAID MAGNETIC POLE PIECE TO PROVIDE AN ANNULAR GAP BETWEEN THE TOP PORTION OF SAID YOKE AND SAID MAGNETIC POLE PIECE; A SECOND MAGNET OF HIGH COERCIVITY AXIALLY DISPLACED FROM SAID MAGNETIC POLE PIECE TO PROVIDE A SECOND GAP BETWEEN SAID MAGNETIC POLE PIECE AND SAID SECOND MAGNET, SAID SECOND MAGNET BEING MAGNETICALLY POLARIZED WITH RESPECT TO THE POLARIZATION OF SAID FIRST MAGNET TO FORCE THE LEAKAGE FLUX IN SAID SECOND GAP FROM SAID CENTRAL MAGNET TO THE TOP PORTION OF SAID YOKE VIA SAID ANNULAR GAP.
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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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |