US4945189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asymmetric audio cable for high fidelity signals
Assignee: Individual
•
Filing: 1989-08-09
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Granted: 1990-07-31
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Expires: 2009-08-09
Abstract
Abstract An interconnection cable for audio frequency high fidelity applications comprises a first and a second conductor which are disposed close to one another and connected at the ends, wherein the second conductor has an electrical length which is a least three times longer than the first conductor. The second conductor is helically wound about the first conductor. A third conductor may be included in the space within the helical winding, and in one embodiment may be connected at the ends of the first and second conductor. In another embodiment, the third conductor may be insulated from the first conductor and the second conductor for signal return.
Inventors
- 👤 Donald E. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:30
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/12; H01B11/125
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
An interconnection cable for audio frequency high fidelity applications for carrying a signal comprising: a first conductor; a second conductor disposed helically surrounding said first conductor and insulated from said first conductor; said first conductor and said second conductor each having first ends electrically connected one another at a signal source and second ends electrically connected to one another at a load; and said second conductor having a physical length substantially longer than said first conductor such that signal length of said second conductor is substantially greater than signal length of said first conductor in order to minimize lengthwise end to end resonance.
Claim 2
Dependent Claim
103 words
An interconnection cable for audio frequency high fidelity applications for carrying a signal comprising: a first conductor; a second conductor disposed helically surrounding said first conductor and insulated from said first conductor; said first conductor and said second conductor each having first ends electrically connected one another at a signal source and second ends electrically connected to one another at a load; and said second conductor having a physical length substantially longer than said first conductor such that signal length of said second conductor is substantially greater than signal length of said first conductor in order to minimize lengthwise end to end resonance.
Claim 3
Dependent Claim
31 words
The cable according to claim 1 wherein said second conductor has an electrical signal length which is at least 3 times longer than an electrical signal length of said first conductor.
Claim 4
Dependent Claim
20 words
The cable according to claim 1 wherein said second conductor is at least 7 times longer than said first conductor.
Claim 5
Dependent Claim
60 words
The cable according to claim 1 further including a third conductor, said third conductor being electrically connected at a first end to said first conductor and said second conductor and electrically connected at a second end to said first conductor and said second conductor and wherein said second conductor is coiled around said first conductor and around said third conductor.
Claim 6
Dependent Claim
26 words
The cable according to claim 4 wherein said second conductor has an electrical signal length which is at least 3 times longer than said first conductor.
Claim 7
Dependent Claim
20 words
The cable according to claim 4 wherein said second conductor is at least 7 times longer than said first conductor.
Claim 8
Dependent Claim
20 words
The cable according to claim 4 wherein said first conductor and said third conductor are helically twisted about one another.
Claim 9
Dependent Claim
76 words
The cable according to claim 1 further including a third conductor, said third conductor being electrically connected at a first end to a signal source and connected at a second end to a load, said third conductor being insulated from said second conductor and said first conductor and wherein said second conductor is coiled around said first conductor and around said third conductor, the third conductor constrained to carry all signal components of a return signal
Claim 10
Dependent Claim
25 words
The cable according to claim wherein said second conductor has an electrical signal length which is at least 3 times longer than said first conductor.
Claim 11
Dependent Claim
20 words
The cable according to claim 8 wherein said second conductor is at least 7 times longer than said first conductor.
Claim 12
Dependent Claim
20 words
The cable according to claim 8 wherein said first conductor and said third conductor are helically twisted about one another.
References Cited (Backward Citations)
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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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |