Patent US2193549A successfully refreshed from Google Patents.
Patent US3206656A successfully refreshed from Google Patents.
US3206656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety solenoid having a permanent magnet latching means
Assignee: Individual
•
Filing: 1963-09-24
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Granted: 1965-09-14
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Daniel D Musgrave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:49
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/121; H01F7/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SAFETY SOLENOID COMPRISING: AN ELECTROMAGNETIC HAVING A CORE AND METALLIC MAGNETIC FIELD RETURN MEANS; A PERMANENTLY MAGNETIZED PLUNGER SLIDEABLE RELATIVE TO SAID CORE AND NORMALLY RETAINED BY RELEASABLE DETENT MEANS AT A POSITION AWAY FROM SAID CORE; AND A PERMANENTLY MAGNETIZED LATCH HAVING A MAGNETIC AXIS SUBSTANTIALLY COINCIDENTAL WITH THE MAGNETIC AXIS OF SAID PLUNGER AND HAVING POLES ORIENTED OPPOSITELY TO THE POLES OF SAID PLUNGER, AND NORMALLY JUXTAPOSED AND ADHERING TO SAID FIELD RETURN MEANS AT A LATCHED POSITION WHEREAT SAID LATCH IS POSITIONALLY ADAPTED FOR PREVENTING RELEASE OF SAID DETENT
Claim 2
Dependent Claim
93 words
A SAFETY SOLENOID COMPRISING: AN ELECTROMAGNETIC HAVING A CORE AND METALLIC MAGNETIC FIELD RETURN MEANS; A PERMANENTLY MAGNETIZED PLUNGER SLIDEABLE RELATIVE TO SAID CORE AND NORMALLY RETAINED BY RELEASABLE DETENT MEANS AT A POSITION AWAY FROM SAID CORE; AND A PERMANENTLY MAGNETIZED LATCH HAVING A MAGNETIC AXIS SUBSTANTIALLY COINCIDENTAL WITH THE MAGNETIC AXIS OF SAID PLUNGER AND HAVING POLES ORIENTED OPPOSITELY TO THE POLES OF SAID PLUNGER, AND NORMALLY JUXTAPOSED AND ADHERING TO SAID FIELD RETURN MEANS AT A LATCHED POSITION WHEREAT SAID LATCH IS POSITIONALLY ADAPTED FOR PREVENTING RELEASE OF SAID DETENT
References Cited (Backward Citations)
US3126501A
Cited
US3040217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |