US3278877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency transformer having an improved q
Assignee: Toko Inc
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Filing: 1965-05-17
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Granted: 1966-10-11
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Kameya Kazuo
- 👤 Takahashi Teruo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:40
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A HIGH FREQUENCY COIL COMPRISING A COIL BOBBIN INCLUDING A PLURALITY OF CLOSELY SPACED PARALLEL FLANGES, EACH OF SAID FLANGES BEING PROVIDED WITH A RADIAL SLOT FOR PASSING A COIL CONDUCTOR, AND THE GAP BETWEEN ADJACENT FLANGES HAVING A WIDTH S REPRESENTED BY A FORMULA D$S$2D, WHERE D REPRESENTS THE DIAMETER OF SAID COIL CONDUCTOR, A PRIMARY WINDING AND A SECONDARY WINDING SPIRALLY WOUND IN SAID GAPS, A CUP SHAPED CORE SURROUNDING SAID BOBBIN AND SAID WINDINGS, AN INDUCTANCE ADJUSTING CORE ADJUSTABLY RECEIVED IN A THREADED BORE IN SAID BOBBIN AND A SHIELD CASING SURROUNDING THE ABOVE-MENTIONED COMPONENTS.
Claim 2
Dependent Claim
98 words
A HIGH FREQUENCY COIL COMPRISING A COIL BOBBIN INCLUDING A PLURALITY OF CLOSELY SPACED PARALLEL FLANGES, EACH OF SAID FLANGES BEING PROVIDED WITH A RADIAL SLOT FOR PASSING A COIL CONDUCTOR, AND THE GAP BETWEEN ADJACENT FLANGES HAVING A WIDTH S REPRESENTED BY A FORMULA D$S$2D, WHERE D REPRESENTS THE DIAMETER OF SAID COIL CONDUCTOR, A PRIMARY WINDING AND A SECONDARY WINDING SPIRALLY WOUND IN SAID GAPS, A CUP SHAPED CORE SURROUNDING SAID BOBBIN AND SAID WINDINGS, AN INDUCTANCE ADJUSTING CORE ADJUSTABLY RECEIVED IN A THREADED BORE IN SAID BOBBIN AND A SHIELD CASING SURROUNDING THE ABOVE-MENTIONED COMPONENTS.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |