Patent US2337253A successfully refreshed from Google Patents.
Patent US3267400A successfully refreshed from Google Patents.
US3267400A
Expired / Lapsed
US
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Variable inductance device
Assignee: United Transformer Corp
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Filing: 1963-09-19
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Granted: 1966-08-16
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Craige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A VARIABLE INDUCTIVE DEVICE COMPRISING A CORE HAVING PLURAL LAMINATIONS PROVIDING A MAGNETIC CIRCUIT, SAID LAMINATIONS BEING ARRANGED RELATIVE TO EACH OTHER TO DEFINE AN AIR GAP IN SAID MAGNETIC CIRCUIT, FIRST GROUPS OF LAMINATIONS BEING ARRANGED IN RELATION TO EACH OTHER TO PROVIDE A RELATIVELY FIXED LENGTH FOR A FIRST SEGMENT OF SAID AIR GAP AND A CORRESPONDING RELATIVELY FIXED VALUE OF INDUCTANCE, AND MEANS FOR MOUNTING A SECOND GROUP OF LAMINATIONS FOR MOVEMENT RELATIVE TO SAID AIR GAP AND IN PLANES PARALLEL TO THE LAMINATIONS OF SAID FIRST GROUP TO PROVIDE AN ADJUSTABLE LENGTH FOR A SECOND SEGMENT OF SAID AIR GAP AND A CORRESPONDING VARIABLE INDUCTANCE WHEREBY VERNIER ADJUSTMENT MAY BE MADE IN THE TOTAL INDUCTANCE OF SAID DEVICE.
Claim 2
Dependent Claim
122 words
A VARIABLE INDUCTIVE DEVICE COMPRISING A CORE HAVING PLURAL LAMINATIONS PROVIDING A MAGNETIC CIRCUIT, SAID LAMINATIONS BEING ARRANGED RELATIVE TO EACH OTHER TO DEFINE AN AIR GAP IN SAID MAGNETIC CIRCUIT, FIRST GROUPS OF LAMINATIONS BEING ARRANGED IN RELATION TO EACH OTHER TO PROVIDE A RELATIVELY FIXED LENGTH FOR A FIRST SEGMENT OF SAID AIR GAP AND A CORRESPONDING RELATIVELY FIXED VALUE OF INDUCTANCE, AND MEANS FOR MOUNTING A SECOND GROUP OF LAMINATIONS FOR MOVEMENT RELATIVE TO SAID AIR GAP AND IN PLANES PARALLEL TO THE LAMINATIONS OF SAID FIRST GROUP TO PROVIDE AN ADJUSTABLE LENGTH FOR A SECOND SEGMENT OF SAID AIR GAP AND A CORRESPONDING VARIABLE INDUCTANCE WHEREBY VERNIER ADJUSTMENT MAY BE MADE IN THE TOTAL INDUCTANCE OF SAID DEVICE.
References Cited (Backward Citations)
US2879489A
Cited
US3154756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |