US3961292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency transformer
Assignee: Individual
•
Filing: 1975-05-19
•
Granted: 1976-06-01
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Expires: 1995-05-19
Abstract
Abstract An improved radio-frequency transformer, particularly useful in conductive-body antenna systems, is provided in which telescoping of two or more portions of the primary of the transformer results in increased compactness, high effeciency and decreased cost.
Inventors
- 👤 Ross Alan Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A radio-frequency transformer system, including: a source of push-pull radio-frequency signals having first and second output terminals at respective ones of which radio-frequency signals of substantially equal amplitude but opposite phase appear; a transformer primary having first and second hollow tubular portions, said second portion being nested within but electrically insulated from said first portion; and, a secondary winding including multiple turns of an electrical conductor passing through the inner opening of said second portion of said primary; said first and second portions of said primary each having a first and a second end, said first end of said first portion being coupled to said first output terminal, said first end of said second portion being coupled to said second output terminal; said first end of said first portion being juxtaposed to said second end of said second portion and said first end of said second portion being juxtaposed to said second end of said first portion.
Claim 2
Dependent Claim
157 words
A radio-frequency transformer system, including: a source of push-pull radio-frequency signals having first and second output terminals at respective ones of which radio-frequency signals of substantially equal amplitude but opposite phase appear; a transformer primary having first and second hollow tubular portions, said second portion being nested within but electrically insulated from said first portion; and, a secondary winding including multiple turns of an electrical conductor passing through the inner opening of said second portion of said primary; said first and second portions of said primary each having a first and a second end, said first end of said first portion being coupled to said first output terminal, said first end of said second portion being coupled to said second output terminal; said first end of said first portion being juxtaposed to said second end of said second portion and said first end of said second portion being juxtaposed to said second end of said first portion.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 which includes, in addition, resonating means for resonating said secondary winding at a predetermined radio frequency.
Claim 4
Dependent Claim
14 words
Apparatus according to claim 2 in which said resonating means includes a variable condenser.
Claim 5
Dependent Claim
41 words
Apparatus according to claim 1 which includes, in addition, a third hollow tube of conductive material interposed between said second portion of said primary and said secondary winding, said third hollow tube being connected to ground potential substantially at its midpoint.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 4 which includes, in addition, capacitive means for resonating said secondary winding.
Claim 7
Dependent Claim
18 words
Apparatus according to claim 5 which includes, in addition, ferrite beads surrounding said first portion of said primary.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 1 in which said first and second portions of said primary have their ends substantially co-terminant.
References Cited (Backward Citations)
US1160960A
Cited
GB308406A
Cited
US2376101A
Cited
US3005965A
Cited
US3197723A
Cited
US3614694A
Cited
US3717876A
Cited
US3717808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |