Patent US3206655A successfully refreshed from Google Patents.
US3206655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet system comprising two structurally identical parts
Assignee: US Philips Corp
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Filing: 1957-03-13
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Granted: 1965-09-14
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Expires: 1977-03-13
Abstract
No abstract record available.
Inventors
- 👤 Reijnst Maximilien Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:14
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0226; F; F41; F41C; F41C27/00; F41C27/04; F41G; F41G1/00; F41G1/02; F41G1/04; F41G1/38; F41G1/383; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043; H02K49/046; H02K49/10; H02K49/104; H02K49/106; H02K49/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A MAGNETIC CIRCUIT PRODUCING A CONTROLLABLE EXTERNAL MAGNETIC FIELD, COMPRISING A PAIR OF ABUTTING, COOPERATING MEMBERS, EACH OF SAID MEMBERS COMPRISING A PLURALITY OF THIN PERMANENT MAGNETS AND A PLURALITY OF THINNER SOFT MAGNETIC BODIES CONSTITUTED OF HIGH PERMEABILITY MATERIAL, SAID MAGNETS BEING MAGNETIZED IN THE DIRECTION OF THINNESS PRODUCING POLES OF LIKE POLARITY ON ADJACENT FACING SURFACES OF EACH PAIR OF MAGNETS, SAID MAGNETS AND BODIES BEING ALTERNATELY ARRANGED IN ABUTTING RELATIONSHIP WHEREBY OPPOSED SURFACES OF EACH SOFT MAGNETIC BODY CONFRONT POLES OF THE SAME POLARITY ON THE PERMANENT MAGNETS, SAID MEMBERS BEING DISPLACEABLE RELATIVE TO ONE ANOTHER OVER A DISTANCE OF ABOUT THE SPACING BETWEEN ADJACENT SOFT MAGNETIC BODIES, WHEREBY IN ONE POSITION POLES OF LIKE POLARITY IN THE DIFFERENT MEMBERS FACE ONE ANOTHER PRODUCING A STRONG EXTERNAL MAGNETIC FIELD, AND WHEREBY IN ANOTHER POSITION POLES OF OPPOSITE POLARITY IN THE DIFFERENT MEMBERS FACE ONE ANOTHER.
Claim 2
Dependent Claim
148 words
A MAGNETIC CIRCUIT PRODUCING A CONTROLLABLE EXTERNAL MAGNETIC FIELD, COMPRISING A PAIR OF ABUTTING, COOPERATING MEMBERS, EACH OF SAID MEMBERS COMPRISING A PLURALITY OF THIN PERMANENT MAGNETS AND A PLURALITY OF THINNER SOFT MAGNETIC BODIES CONSTITUTED OF HIGH PERMEABILITY MATERIAL, SAID MAGNETS BEING MAGNETIZED IN THE DIRECTION OF THINNESS PRODUCING POLES OF LIKE POLARITY ON ADJACENT FACING SURFACES OF EACH PAIR OF MAGNETS, SAID MAGNETS AND BODIES BEING ALTERNATELY ARRANGED IN ABUTTING RELATIONSHIP WHEREBY OPPOSED SURFACES OF EACH SOFT MAGNETIC BODY CONFRONT POLES OF THE SAME POLARITY ON THE PERMANENT MAGNETS, SAID MEMBERS BEING DISPLACEABLE RELATIVE TO ONE ANOTHER OVER A DISTANCE OF ABOUT THE SPACING BETWEEN ADJACENT SOFT MAGNETIC BODIES, WHEREBY IN ONE POSITION POLES OF LIKE POLARITY IN THE DIFFERENT MEMBERS FACE ONE ANOTHER PRODUCING A STRONG EXTERNAL MAGNETIC FIELD, AND WHEREBY IN ANOTHER POSITION POLES OF OPPOSITE POLARITY IN THE DIFFERENT MEMBERS FACE ONE ANOTHER.
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) | 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 |