US4408443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunications cable and method of making same
Assignee: AT&T Inc
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Filing: 1981-11-05
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Granted: 1983-10-11
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Expires: 2001-11-05
Abstract
Abstract A telecommunication cable, and method of making same, is disclosed comprised of more than five S-Z twisted wire pairs having their twist reversals longitudinally staggered in a repetitive sequence of 1 to N longitudinally spaced positions. The wire pairs are bundled with any adjacent pairs having their twist reversals non-overlapped and staggered by no more than N/2 positions which limits S to Z coupling.
Inventors
- 👤 Robert J. Brown
- 👤 Clyde J. Lever, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:00
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/575; C07K14/62; A; A61; A61P; A61P3/00; A61P3/06; C07H; C07H15/00; C07H15/20; C07H15/203; H; H01; H01B; H01B11/00; H01B11/02; H01B11/04; H01B13/00; H01B13/02; H01B13/04; A61K; A61K38/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A telecommunications cable comprised of more than five S-Z twisted wire pairs having their twist reversals longitudinally staggered in a repetitive sequence of 1 to N, where N is an integer, longitudinally spaced positions, and with said wires bundled together with any adjacent wire pairs having their twist reversals non-overlapped and staggered by no more than N/2 positions to limit S to Z coupling.
Claim 2
Dependent Claim
64 words
A telecommunications cable comprised of more than five S-Z twisted wire pairs having their twist reversals longitudinally staggered in a repetitive sequence of 1 to N, where N is an integer, longitudinally spaced positions, and with said wires bundled together with any adjacent wire pairs having their twist reversals non-overlapped and staggered by no more than N/2 positions to limit S to Z coupling.
Claim 3
Dependent Claim
39 words
A telecommunications cable in accordance with claim 1 wherein the twist reversals of each wire pair are spaced apart longitudinally an equal fixed distance, whereby corresponding positions in the sequence are uniformly spaced throughout the length of the cable.
Claim 4
Dependent Claim
46 words
A telecommunications cable in accordance with claim 1 having said more than five twisted wire pairs bundled together in a plurality of layers, and wherein all adjacent wire pairs within each layer have their twist reversals staggered by one position in said sequence of staggered positions.
Claim 5
Independent Claim
74 words
A method of manufacturing a telecommunications cable comprising the steps of: forming more than five S-Z twisted wire pairs; grouping the wire pairs with their twist reversal sections longitudinally staggered in a repetitive sequence of 1 to N positions, where N is an integer; and stranding the wire pairs into a unit with the pairs organized such that adjacent wire pairs have their twist reversals non-overlapping and staggered by no more than N/2 positions.
Claim 6
Independent Claim
74 words
A method of manufacturing a telecommunications cable comprising the steps of: forming more than five S-Z twisted wire pairs; grouping the wire pairs with their twist reversal sections longitudinally staggered in a repetitive sequence of 1 to N positions, where N is an integer; and stranding the wire pairs into a unit with the pairs organized such that adjacent wire pairs have their twist reversals non-overlapping and staggered by no more than N/2 positions.
Claim 7
Dependent Claim
37 words
The method of claim 4 wherein the wire pairs are stranded into a multi-layered unit with all adjacent wire pairs within each layer having their twist reversals staggered by one position in the sequence of staggered positions.
Claim 8
Independent Claim
82 words
A method of stranding a group of more than five S-Z twisted wire pairs having their twist reversals longitudinally staggered in a repetitive sequence of 1 to N positions, where N is an integer, into a telecommunications cable characterized by low near end crosstalk, and with the method comprising the steps of advancing the more than five pairs through holes of a faceplate selected such that adjacent wire pairs have their twist reversals non-overlapped and staggered by no more than N/2 positions.
Claim 9
Independent Claim
82 words
A method of stranding a group of more than five S-Z twisted wire pairs having their twist reversals longitudinally staggered in a repetitive sequence of 1 to N positions, where N is an integer, into a telecommunications cable characterized by low near end crosstalk, and with the method comprising the steps of advancing the more than five pairs through holes of a faceplate selected such that adjacent wire pairs have their twist reversals non-overlapped and staggered by no more than N/2 positions.
Claim 10
Dependent Claim
45 words
The method of claim 6 wherein the faceplate holes are arranged in a plurality of layers and wherein the wire pairs having their twist reversals staggered by one position in the sequence of staggered positions are advanced through adjacent holes within common layers of holes.
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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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |