US3074012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductance control apparatus
Assignee: TRAK ELECTRONICS CO Inc
•
Filing: 1958-05-23
•
Granted: 1963-01-15
•
Expires: 1978-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Smith-Vaniz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:18
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A CONTROLLABLE INDUCTOR COMPRISING A CORE OF FERROMAGNETIC MATERIAL HAVING A YOKE PORTION AND A SIGNAL PORTION, SAID SIGNAL PORTION BEING FORMED OF FERRITE HAVING A LOW VALUE OF RETENTIVITY, A SIGNAL WINDING CARRIED BY SAID SIGNAL PORTION, THE EFFECTIVE INDUCTANCE OF SAID SIGNAL WINDING BEING CONTROLLED BY THE PERMEABILITY OF SAID SIGNAL PORTION, A CONTROL WINDING POSITIONED TO INDUCE MAGNETIC FLUX IN SAID CORE, SAID YOKE PORTION INCLUDING MAGNETIC MATERIAL OF HIGHER RETENTIVITY THAN SAID SIGNAL PORTION AND HAVING SUFFICIENT MAGNETIC RETENTIVITY TO SUBSTANTIALLY SATURATE SAID SIGNAL PORTION AND COERCIVE FORCE SUFFICIENT TO MAINTAIN SUBSTANTIALLY SATURATING FLUX IN SAID SIGNAL PORTION IN THE ABSENCE OF ANY CONTROL CURRENT IN SAID CONTROL WINDING.
Claim 2
Dependent Claim
113 words
A CONTROLLABLE INDUCTOR COMPRISING A CORE OF FERROMAGNETIC MATERIAL HAVING A YOKE PORTION AND A SIGNAL PORTION, SAID SIGNAL PORTION BEING FORMED OF FERRITE HAVING A LOW VALUE OF RETENTIVITY, A SIGNAL WINDING CARRIED BY SAID SIGNAL PORTION, THE EFFECTIVE INDUCTANCE OF SAID SIGNAL WINDING BEING CONTROLLED BY THE PERMEABILITY OF SAID SIGNAL PORTION, A CONTROL WINDING POSITIONED TO INDUCE MAGNETIC FLUX IN SAID CORE, SAID YOKE PORTION INCLUDING MAGNETIC MATERIAL OF HIGHER RETENTIVITY THAN SAID SIGNAL PORTION AND HAVING SUFFICIENT MAGNETIC RETENTIVITY TO SUBSTANTIALLY SATURATE SAID SIGNAL PORTION AND COERCIVE FORCE SUFFICIENT TO MAINTAIN SUBSTANTIALLY SATURATING FLUX IN SAID SIGNAL PORTION IN THE ABSENCE OF ANY CONTROL CURRENT IN SAID CONTROL WINDING.
References Cited (Backward Citations)
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US2200263A
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US2059393A
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US2302893A
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US2462423A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |