Patent US3153758A successfully refreshed from Google Patents.
US3153758A
Expired / Lapsed
US
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Current comparator device having plural magnetic cores and multiple windings
Assignee: National Research Council Canada
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Filing: 1961-12-26
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Granted: 1964-10-20
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Norbert L Kusters
- 👤 Petar N Miljanic
- 👤 William J M Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/18; G01R15/183; G01R15/185; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A CURRENT COMPARATOR DEVICE COMPRISING (A) AN INNER MAGNETIC CORE CLOSED ON ITSELF TO FORM A MAGNETIC CIRCUIT AND DEFINE A LONGITUDINAL AXIS EXTENDING ALONG AND AROUND SAID CORE, (B) A DETECTION WINDING AROUND SAID CORE, (C) AN INTERNAL PART OF AN EXCITATION WINDING AROUND SAID CORE, (D) A SECOND MAGNETIC CORE CLOSED ON ITSELF TO FORM A MAGNETIC CIRCUIT, SAID SECOND CORE EXTENDING COAXIALLY WITH SAID LONGITUDINAL AXIS OF THE INNER CORE AND BEING POSITIONED RADIALLY OUTWARDLY OF BOTH SAID DETEC-
Claim 2
Dependent Claim
82 words
A CURRENT COMPARATOR DEVICE COMPRISING (A) AN INNER MAGNETIC CORE CLOSED ON ITSELF TO FORM A MAGNETIC CIRCUIT AND DEFINE A LONGITUDINAL AXIS EXTENDING ALONG AND AROUND SAID CORE, (B) A DETECTION WINDING AROUND SAID CORE, (C) AN INTERNAL PART OF AN EXCITATION WINDING AROUND SAID CORE, (D) A SECOND MAGNETIC CORE CLOSED ON ITSELF TO FORM A MAGNETIC CIRCUIT, SAID SECOND CORE EXTENDING COAXIALLY WITH SAID LONGITUDINAL AXIS OF THE INNER CORE AND BEING POSITIONED RADIALLY OUTWARDLY OF BOTH SAID DETEC-
References Cited (Backward Citations)
US316817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |