Patent US3238485A successfully refreshed from Google Patents.
US3238485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bobbin and core assembly
Assignee: Automatic Electric Laboratories Inc
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Filing: 1963-08-23
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Granted: 1966-03-01
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Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Litchfield
- 👤 James A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:28
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/02; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A QUICK RELEASE ELECTROMAGNETIC DEVICE, A BOBBIN AND CORE ASSEMBLY COMPRISING A CYLINDRICAL CORE OF MAGNETIC MATERIAL HAVING TWO ENDS AND AN EXTERNAL SURFACE SAID EXTERNAL SURFACE HAVING A PAIR OF GROOVES THEREIN, EACH OF SAID GROOVES SURROUNDING SAID CORE NEAR ONE END, A MOLDED COIL BOBBIN HAVING A HOLLOW TUBULAR PORTION WITH AN INTERNAL SURFACE, SAID INTERNAL SURFACE HAVING AT LEAST ONE RADIAL PROJECTION THEREON, SAID CORE RECEIVED BY SAID HOLLOW TUBULAR PORTION OF SAID BOBBIN, SAID PROJECTION ENGAGING SAID CORE IN ONE SAID GROOVES TO LOCK SAID CORE IN SAID BOBBIN, AND A RESIDUAL CAP OF NON-MAGNETIC MATERIAL HAVING A HOLLOW CYLINDRICAL CONFIGURATION WITH ONE OPEN END AND ONE CLOSED END, A CONSTRICTED PORTION ON SAID OPEN END, SAID CAP BEING MOUNTED OVER THE END OF SAID CORE WITH SAID CONSTRICTED PORTION ENGAGING SAID CORE IN THE OTHER OF SAID GROOVES TO LOCK CAP ON SAID CORE.
Claim 2
Dependent Claim
150 words
IN A QUICK RELEASE ELECTROMAGNETIC DEVICE, A BOBBIN AND CORE ASSEMBLY COMPRISING A CYLINDRICAL CORE OF MAGNETIC MATERIAL HAVING TWO ENDS AND AN EXTERNAL SURFACE SAID EXTERNAL SURFACE HAVING A PAIR OF GROOVES THEREIN, EACH OF SAID GROOVES SURROUNDING SAID CORE NEAR ONE END, A MOLDED COIL BOBBIN HAVING A HOLLOW TUBULAR PORTION WITH AN INTERNAL SURFACE, SAID INTERNAL SURFACE HAVING AT LEAST ONE RADIAL PROJECTION THEREON, SAID CORE RECEIVED BY SAID HOLLOW TUBULAR PORTION OF SAID BOBBIN, SAID PROJECTION ENGAGING SAID CORE IN ONE SAID GROOVES TO LOCK SAID CORE IN SAID BOBBIN, AND A RESIDUAL CAP OF NON-MAGNETIC MATERIAL HAVING A HOLLOW CYLINDRICAL CONFIGURATION WITH ONE OPEN END AND ONE CLOSED END, A CONSTRICTED PORTION ON SAID OPEN END, SAID CAP BEING MOUNTED OVER THE END OF SAID CORE WITH SAID CONSTRICTED PORTION ENGAGING SAID CORE IN THE OTHER OF SAID GROOVES TO LOCK CAP ON SAID CORE.
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |