Patent US3218547A successfully refreshed from Google Patents.
US3218547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flux sensing device using a tubular core with toroidal gating coil and solenoidal output coil wound thereon
Assignee: Individual
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Filing: 1961-11-29
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Granted: 1965-11-16
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Ling Sung Ching
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01R33/05; G01R33/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A FLUX SENSING DEVICE COMPRISING: A TUBULAR CORE OF HIGH PERMEABILITY CONDUCTIVE METAL ALLOY HAVING A LONGITUDINAL AXIS AND UNIFORM DIMENSIONS IN THE AXIAL DIRECTION, SAID TUBULAR CORE HAVING A LONGITUDINAL GAP IN THE WALL THEREOF; AN INSULATING SPACER CLOSING SUCH GAP AND HAVING A FERRITE MATERIAL COATED THEREON FOR CONTACTING THE EDGES OF SAID GAP; A TOROIDAL GATING COIL SURROUNDING SAID CORE AND RESPONSIVE TO AN ALTERNATING CURRENT SIGNAL FOR GATING SAID TUBULAR CORE; AND A SOLENOIDAL SIGNAL OUTPUT COIL WOUND COAXILIALLY ABOUT SAID LONGITUDINAL AXIS FOR DETECTING ANY CHANGE IN MAGNETIC FLUX PASSING THROUGH SAID TUBULAR CORE.
Claim 2
Dependent Claim
99 words
A FLUX SENSING DEVICE COMPRISING: A TUBULAR CORE OF HIGH PERMEABILITY CONDUCTIVE METAL ALLOY HAVING A LONGITUDINAL AXIS AND UNIFORM DIMENSIONS IN THE AXIAL DIRECTION, SAID TUBULAR CORE HAVING A LONGITUDINAL GAP IN THE WALL THEREOF; AN INSULATING SPACER CLOSING SUCH GAP AND HAVING A FERRITE MATERIAL COATED THEREON FOR CONTACTING THE EDGES OF SAID GAP; A TOROIDAL GATING COIL SURROUNDING SAID CORE AND RESPONSIVE TO AN ALTERNATING CURRENT SIGNAL FOR GATING SAID TUBULAR CORE; AND A SOLENOIDAL SIGNAL OUTPUT COIL WOUND COAXILIALLY ABOUT SAID LONGITUDINAL AXIS FOR DETECTING ANY CHANGE IN MAGNETIC FLUX PASSING THROUGH SAID TUBULAR CORE.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |