Patent US4201962A successfully refreshed from Google Patents.
US4201962A
Expired / Lapsed
US
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Input transformer arrangement for use in a television receiver
Assignee: Sanyo Electric Co Ltd
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Filing: 1978-10-20
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Granted: 1980-05-06
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Expires: 1998-10-20
Abstract
Abstract An input transformer arrangement includes an unbalanced signal suppress transformer for suppressing unbalanced signal carried in a feeder line extending between a television receiver and an antenna therefor, and an impedance transformer for dropping the impedance. These two transformers are arranged on one core for unifying and simplifying the arrangement.
Inventors
- 👤 Nobukazu Hosoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:01
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/42; H03H7/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
An input transformer arrangement for use in a television receiver, including an unbalanced signal suppress transformer for suppressing an unbalanced signal carried on at least one of a pair of lead wires constituting a feeder line extending between the television receiver and an antenna therefor, and an impedance transformer, said input transformer comprising: a first coil having input and output ends; a second coil having input and output ends, said first and second coils magnetically coupled to each other in such a manner as to match the phase sequence of the first coil with that of the second coil for forming a first transformer theretogether; and a third coil connected between the output end of the first coil and output end of the second coil, said third coil having a center portion thereof grounded for forming a second transformer, the first transformer adapted to suppress the unbalanced signal while the second transformer is adapted to reduce the impedance.
Claim 2
Dependent Claim
158 words
An input transformer arrangement for use in a television receiver, including an unbalanced signal suppress transformer for suppressing an unbalanced signal carried on at least one of a pair of lead wires constituting a feeder line extending between the television receiver and an antenna therefor, and an impedance transformer, said input transformer comprising: a first coil having input and output ends; a second coil having input and output ends, said first and second coils magnetically coupled to each other in such a manner as to match the phase sequence of the first coil with that of the second coil for forming a first transformer theretogether; and a third coil connected between the output end of the first coil and output end of the second coil, said third coil having a center portion thereof grounded for forming a second transformer, the first transformer adapted to suppress the unbalanced signal while the second transformer is adapted to reduce the impedance.
Claim 3
Dependent Claim
22 words
An input transformer arrangement as claimed in claim 1, wherein said first transformer has a coupling coefficient thereof substantially equal to 1.
Claim 4
Dependent Claim
91 words
An input transformer arrangement as claimed in claim 1 further comprises a core member having first and second openings formed in side-by-side relation to each other for forming a first rim portion next to the first opening and remote from the second opening, a second rim portion next to the second opening and remote from the first opening, and a central portion between the first and second openings, said first and second coils being wound on the first rim portion and said third coil being wound on the second rim portion.
Claim 5
Dependent Claim
23 words
An input transformer arrangement as claimed in claim 3, wherein said first and second coils are wound in side-by-side relation to each other.
Claim 6
Dependent Claim
19 words
An input transformer arrangement as claimed in claim 3, wherein said third coil is wound as a bifilar winding.
Claim 7
Dependent Claim
32 words
An input transformer arrangement as claimed in claim 3, wherein the width of the central portion is not smaller than twice the width of each of the first and second rim portions.
Claim 8
Dependent Claim
22 words
An input transformer arrangement as claimed in claim 3, wherein the first rim portion is thin gauged at the central region thereof.
Claim 9
Dependent Claim
22 words
An input transformer arrangement as claimed in claim 3, wherein the second rim portion is thin gauged at the central region thereof.
References Cited (Backward Citations)
US3223920A
Cited
US3631534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |