Patent US3453399A successfully refreshed from Google Patents.
US3453399A
Expired / Lapsed
US
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Magnetic flux measuring device
Assignee: US Philips Corp
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Filing: 1966-09-02
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Granted: 1969-07-01
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Expires: 1986-09-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph Lodenwijk Mar Reijnders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:33
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/335
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A MAGNETIC FLUX MEASURING DEVICE COMPRISING: A MAGNETIC HEAD INCLUDING A FIRST AND SECOND MAGNETIC CIRCUIT PORTION JOINED BY A COMMON PORTION, SAID FIRST AND SECOND CIRCUIT PORTIONS EACH HAVING FORMED THEREIN AN APERTURE, EACH SAID APERTURE HAVING AN AXIS ORTHOGONALLY PLACED WITH RESPECT TO THE OTHER, SAID FIRST CIRCUIT PORTION HAVING INDUCED THEREIN A MAGNETIC FLUX TO BE MEASURED, SAID SECOND CIRCUIT PORTION HAVING INDUCED THEREIN A MODULATING FLUX FOR CAUSING SAID FIRST CIRCUIT MAGNETIC FLUX TO BE MODULATED, AND AN AIR GAP, DISPOSED IN SAID COMMON PORTION, SAID AIR GAP POSITIONED ALONG A PLANE EXTENDING SUBSTANTIALLY ORTHOGONALLY TO THE LINES OF FORCE
Claim 2
Dependent Claim
104 words
A MAGNETIC FLUX MEASURING DEVICE COMPRISING: A MAGNETIC HEAD INCLUDING A FIRST AND SECOND MAGNETIC CIRCUIT PORTION JOINED BY A COMMON PORTION, SAID FIRST AND SECOND CIRCUIT PORTIONS EACH HAVING FORMED THEREIN AN APERTURE, EACH SAID APERTURE HAVING AN AXIS ORTHOGONALLY PLACED WITH RESPECT TO THE OTHER, SAID FIRST CIRCUIT PORTION HAVING INDUCED THEREIN A MAGNETIC FLUX TO BE MEASURED, SAID SECOND CIRCUIT PORTION HAVING INDUCED THEREIN A MODULATING FLUX FOR CAUSING SAID FIRST CIRCUIT MAGNETIC FLUX TO BE MODULATED, AND AN AIR GAP, DISPOSED IN SAID COMMON PORTION, SAID AIR GAP POSITIONED ALONG A PLANE EXTENDING SUBSTANTIALLY ORTHOGONALLY TO THE LINES OF FORCE
References Cited (Backward Citations)
US2608621A
Cited
US2700703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |