US3283278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic lifting device having a multi-member core
Assignee: Buck Manufacturing Co
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Filing: 1964-05-11
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Granted: 1966-11-01
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Bernhard A Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:07
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN ELECTROMAGNET FOR LIFTING MAGNETIC ARTICLES OR FOR ATTRACTING TRAMP MAGNETIC MATERIAL COMPRISING A COIL HAVING CONNECTIONS THROUGH WHICH AN ELECTRIC CURRENT IS SUPPLIED THERETO, A CENTRAL CORE MEMBER POSITIONED IN SAID COIL AND ONE END OF SAID MEMBER HAVING A POLE FACEM SAID CORE MEMBER HAVING A DIAMETER SUCH THAT SAID COIL FITS CLOSELY THEREON, AN ELONGATED OUTER CORE MEMBER HAVING THE CENTRAL PART THEREOF ATTACHED TO ONE END OF SAID CENTRAL CORE MEMBER, SAID OUTER CORE MEMBER HAVING THE OPPOSITE ENDS THEREOF DISPOSED ON OPPOSITE SIDES OF SAID COIL AND SAID OPPOSITE ENDS BEING OF LIKE MAGNETIC POLARITY WHEN SAID COIL IS ENERGIZED, SAID OUTER CORE MEMBER HAVING AUXILIARY CORE MEMBERS ON SAID OPPOSITE ENDS EXTENDING OUTWARDLY AND INWARDLY THEREFROM SO THAT THE POLE FACES OF SAID OPPOSITE ENDS AND SAID AUXILIARY CORE MEMEBRS EXTEND PARTIALLY AROUND THE POLE FACE OF SAID CENTRAL CORE MEMBER TO FORM AN AIR GAP THEREBETWEEN, SAID AUXILIARY CORE MEMBERS BEING SHAPED TO MORE UNIFORMLY SPREAD THE WORK PRODUCING MAGNETIC FLUX IN SAID AIR GAP.
Claim 2
Dependent Claim
172 words
AN ELECTROMAGNET FOR LIFTING MAGNETIC ARTICLES OR FOR ATTRACTING TRAMP MAGNETIC MATERIAL COMPRISING A COIL HAVING CONNECTIONS THROUGH WHICH AN ELECTRIC CURRENT IS SUPPLIED THERETO, A CENTRAL CORE MEMBER POSITIONED IN SAID COIL AND ONE END OF SAID MEMBER HAVING A POLE FACEM SAID CORE MEMBER HAVING A DIAMETER SUCH THAT SAID COIL FITS CLOSELY THEREON, AN ELONGATED OUTER CORE MEMBER HAVING THE CENTRAL PART THEREOF ATTACHED TO ONE END OF SAID CENTRAL CORE MEMBER, SAID OUTER CORE MEMBER HAVING THE OPPOSITE ENDS THEREOF DISPOSED ON OPPOSITE SIDES OF SAID COIL AND SAID OPPOSITE ENDS BEING OF LIKE MAGNETIC POLARITY WHEN SAID COIL IS ENERGIZED, SAID OUTER CORE MEMBER HAVING AUXILIARY CORE MEMBERS ON SAID OPPOSITE ENDS EXTENDING OUTWARDLY AND INWARDLY THEREFROM SO THAT THE POLE FACES OF SAID OPPOSITE ENDS AND SAID AUXILIARY CORE MEMEBRS EXTEND PARTIALLY AROUND THE POLE FACE OF SAID CENTRAL CORE MEMBER TO FORM AN AIR GAP THEREBETWEEN, SAID AUXILIARY CORE MEMBERS BEING SHAPED TO MORE UNIFORMLY SPREAD THE WORK PRODUCING MAGNETIC FLUX IN SAID AIR GAP.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |