US3553350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-damping cable
Assignee: ACP Inc
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Filing: 1969-10-10
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Granted: 1971-01-05
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Expires: 1989-10-10
Abstract
Abstract A self-damping conductor structure in which vibration energy is dissipated by the impact of an inner core with an outer mantle, the core being loosely supported within the mantle. Means are provided within the conductor for varying the spacing between the core and mantle at recurring intervals along the length of the conductor. When the core and mantle are suspended with different tension-to-weight ratios, the relative positions of the lines of action of the tension in the core and mantle vary cyclically along the length of the conductor between the supports permitting the core and mantle to contact each other with cyclically varying pressure along the conductor.
Inventors
- 👤 Charles B Rawlins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:04
CPC Classifications
H; H02; H02G; H02G7/00; H02G7/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
A self-damping conductor for suspension from spaced supports, the conductor comprising: a hollow conductive mantle and a conductive core loosely disposed therein; means within said conductor varying the relative positions of the lines-of-action of the tension in said mantle and core at spaced intervals along the length of said conductor when said core and mantle are suspended under tension between supports; and said varying lines of action providing corresponding varying pressures of contact between said mantle and core in a lengthwise direction along said conductor.
Claim 2
Dependent Claim
85 words
A self-damping conductor for suspension from spaced supports, the conductor comprising: a hollow conductive mantle and a conductive core loosely disposed therein; means within said conductor varying the relative positions of the lines-of-action of the tension in said mantle and core at spaced intervals along the length of said conductor when said core and mantle are suspended under tension between supports; and said varying lines of action providing corresponding varying pressures of contact between said mantle and core in a lengthwise direction along said conductor.
Claim 3
Dependent Claim
42 words
The conductor described in claim 1 in which the means for varying the relative positions of the lines of action in the mantle and core includes reduced inner diameter portions of the mantle at locations spaced along the length of the conductor.
Claim 4
Dependent Claim
41 words
The conductor described in claim 1 in which the means for varying the relative positions of the lines of action in the mantle and core includes spacer means disposed around the core at locations spaced along the length of the conductor.
Claim 5
Dependent Claim
62 words
The conductor described in claim 1 in which the core comprises a plurality of helically wound strands of material extending generally in a direction lengthwise of the conductor, and the means in the conductor for varying the relative positions of the lines-of-action of the tensions in the mantle and core comprises an eccentric distribution of tension provided among the plurality of strands.
Claim 6
Dependent Claim
40 words
The conductor described in claim 4 in which the eccentric distribution of tension is provided by a group of adjacent strands of the plurality of strands having a stress-strain characteristic different from that of the remaining strands of the plurality.
Claim 7
Dependent Claim
52 words
The conductor described in claim 1 in which the core comprises at least two layers of helical wound strands of material with an unequal distribution of tension provided among the strands in both layers, the length of lay of the strands in one layer being different from that of the other layer.
Claim 8
Dependent Claim
90 words
A self-damping conductor adapted to be suspended on spaced supports, the conductor comprising: a hollow conductive mantle and a conductive core loosely disposed therein and having means within the conductor for varying the spacing between the core and the mantle along the length of the conductor at intervals spaced more closely than the supports on which the conductor is to be suspended so that when suspended under tEnsion, the relative lines of the tension in the mantle and core will vary cyclically along the length of the conductor between supports.
Claim 9
Dependent Claim
90 words
A self-damping conductor adapted to be suspended on spaced supports, the conductor comprising: a hollow conductive mantle and a conductive core loosely disposed therein and having means within the conductor for varying the spacing between the core and the mantle along the length of the conductor at intervals spaced more closely than the supports on which the conductor is to be suspended so that when suspended under tEnsion, the relative lines of the tension in the mantle and core will vary cyclically along the length of the conductor between supports.
Claim 10
Dependent Claim
60 words
The conductor described in claim 7 in which the means in the conductor for varying the spacing between the mantle and core comprises a spacer disposed between the mantle and core and extending in a lengthwise direction thereof, said spacer being eccentric in relation to the conductor, the eccentricity of spacer rotating about core with lengthwise position of the spacer.
Claim 11
Dependent Claim
50 words
The conductor described in claim 7 in which the means in the conductor for varying the spacing between the mantle and core comprises a sheath of material disposed about the core and between the mantle and core, said sheath having a cyclically varying thickness along the length of the core.
Claim 12
Dependent Claim
53 words
The conductor described in claim 7 in which the means in the conductor for varying the spacing between the mantle and core comprises a sheath of material disposed on the core, said sheath having an irregular cross section that rotates about the core with the lengthwise position of the sheath along the core.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |