Patent US3158795A successfully refreshed from Google Patents.
US3158795A
Expired / Lapsed
US
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Magnetic switch overload device
Assignee: Individual
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Filing: 1963-07-02
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Granted: 1964-11-24
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Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 William F Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:34
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/32; H01H71/321; H01H71/323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A CONTACTLESS MAGNETIC OVERLOAD DEVICE COMPRISING A DISCONTINUOUS CORE HAVING AN AIR GAP, A WINDING ON THE BODY OF SAID CORE, A MAGNETIZABLE MEMBER MOUNTED ROTATABLY IN THE AIR GAP FOR ROTATION BETWEEN FIRST AND SECOND POSITIONS CHARACTERIZED BY RELATIVELY HIGH AND GREATLY REDUCED MAGNETIC RELUCTANCES IN THE AIR GAP, RESPECTIVELY, KEEPER MEANS MAGNETICALLY COUPLED TO SAID MEMBER FOR BIASING IT OT ITS FIRST POSITION, AND MECHANICAL SPRING MEANS COUPLED TO SAID MEMBER FOR OPPOSING THE BIASING FORCE OF SAID KEEPER MEANS TO SUCH A DEGREE THAT WHEN THE FLUX DENSITY IN THE AIR GAP EXCEEDS A PREDETERMINED INTENSITY THE NET MAGNETIC AND MECHANICAL MOMENT WITH RESPECT TO THE AXIS OF ROTATION OF SAID MEMBER IS SUFFICIENT TO ANNUL THE BIASING FORCE OF SAID KEEPER MEANS AND THEREBY CAUSE SAID MEMBER TO BE ACTUATED TO ITS SECOND POSITION WITH A SNAP ACTION.
Claim 2
Dependent Claim
142 words
A CONTACTLESS MAGNETIC OVERLOAD DEVICE COMPRISING A DISCONTINUOUS CORE HAVING AN AIR GAP, A WINDING ON THE BODY OF SAID CORE, A MAGNETIZABLE MEMBER MOUNTED ROTATABLY IN THE AIR GAP FOR ROTATION BETWEEN FIRST AND SECOND POSITIONS CHARACTERIZED BY RELATIVELY HIGH AND GREATLY REDUCED MAGNETIC RELUCTANCES IN THE AIR GAP, RESPECTIVELY, KEEPER MEANS MAGNETICALLY COUPLED TO SAID MEMBER FOR BIASING IT OT ITS FIRST POSITION, AND MECHANICAL SPRING MEANS COUPLED TO SAID MEMBER FOR OPPOSING THE BIASING FORCE OF SAID KEEPER MEANS TO SUCH A DEGREE THAT WHEN THE FLUX DENSITY IN THE AIR GAP EXCEEDS A PREDETERMINED INTENSITY THE NET MAGNETIC AND MECHANICAL MOMENT WITH RESPECT TO THE AXIS OF ROTATION OF SAID MEMBER IS SUFFICIENT TO ANNUL THE BIASING FORCE OF SAID KEEPER MEANS AND THEREBY CAUSE SAID MEMBER TO BE ACTUATED TO ITS SECOND POSITION WITH A SNAP ACTION.
References Cited (Backward Citations)
US2296123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |