US3791131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a concentric wire rope on a double twist strander
Assignee: Individual
•
Filing: 1972-03-27
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Granted: 1974-02-12
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Expires: 1992-03-27
Abstract
Abstract The method of making a concentric wire rope on a double twist strander in which the rope is comprised of outer strands and a core strand and in which the lay of the wires of the outer strands is opposite the lay of the wires of the core strand and in the finished rope the length of the lay of the wires of the core strand has been shortened and the length of the lay of the wires of the outer strands has been increased.
Inventors
- 👤 R Scott
- 👤 M Wesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:03
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0673; D07B3/00; D07B3/02; D07B3/022; D07B2201/00; D07B2201/10; D07B2201/104; D07B2201/1048; D07B2201/1076; D07B2201/108; D07B2201/1084
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
235 words
The method of making a concentric regular lay wire rope comprised of a plurality of outer strands and a core strand in which the lay of the core strand is the same as the lay of the rope and is opposite that of the outer strands, said method comprising the steps of continuously supplying a plurality of outer strands of the same lay and a core strand of the opposite lay to the initial twisting position of a double twist stranding machine, twisting together said continuously advancing outer and core strands at said initial twisting position to start a concentric regular lay wire rope in which the wires of said core strand are twisted more tightly to shorten their lay and the wires of said outer strands are untwisted somewhat to lengthen their lay, passing the partially twisted rope under tension to the second twisting position of said double twist stranding machine to complete the twisting of all said strands in the same direction thereby to further shorten the lay of the wires of said core strand and to further lengthen the lay of the wires of said outer strands and to shorten the lay of the outer strands, the additional shortening in length of the core strand at the second twisting position being at least as great as the additional shortening in length, if any, of the outer strands at the second twisting position.
Claim 2
Independent Claim
235 words
The method of making a concentric regular lay wire rope comprised of a plurality of outer strands and a core strand in which the lay of the core strand is the same as the lay of the rope and is opposite that of the outer strands, said method comprising the steps of continuously supplying a plurality of outer strands of the same lay and a core strand of the opposite lay to the initial twisting position of a double twist stranding machine, twisting together said continuously advancing outer and core strands at said initial twisting position to start a concentric regular lay wire rope in which the wires of said core strand are twisted more tightly to shorten their lay and the wires of said outer strands are untwisted somewhat to lengthen their lay, passing the partially twisted rope under tension to the second twisting position of said double twist stranding machine to complete the twisting of all said strands in the same direction thereby to further shorten the lay of the wires of said core strand and to further lengthen the lay of the wires of said outer strands and to shorten the lay of the outer strands, the additional shortening in length of the core strand at the second twisting position being at least as great as the additional shortening in length, if any, of the outer strands at the second twisting position.
Claim 3
Dependent Claim
54 words
The method set forth in claim 1, all said strands being under substantially equal tension on leaving said first twisting position, the additional twisting at said second twisting position causing said outer strands to grip said core strand and to cause said core strand to be under tension with respect to said outer strands.
Claim 4
Dependent Claim
60 words
The method set forth in claim 1, the twisting of said strands at said first and second twisting positions resulting in a finished rope in which the length of the lay of the wires of said outer strands is increased to about the same extent as the length of the lay of said wires of the core strand is decreased.
Claim 5
Dependent Claim
32 words
The method set forth in claim 1, said method utilizing outer strands and a core strand the wires of which prior to the initial twisting were of the same length of lay.
Claim 6
Dependent Claim
31 words
The method set forth in claim 1, said method utilizing outer strands and a core strand the wires of which prior to the initial twisting were of unequal lengths of lay.
References Cited (Backward Citations)
US3044246A
Cited
US3585792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |