USRE29537E - Torque balanced rope - Google Patents
Torque balanced rope Download PDFInfo
- Publication number
- USRE29537E USRE29537E US05/717,310 US71731076A USRE29537E US RE29537 E USRE29537 E US RE29537E US 71731076 A US71731076 A US 71731076A US RE29537 E USRE29537 E US RE29537E
- Authority
- US
- United States
- Prior art keywords
- rope
- lay
- strands
- torque balanced
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
- D07B1/068—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the strand design
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/1064—Rope or cable structures twisted characterised by lay direction of the strand compared to the lay direction of the wires in the strand
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2015—Killing or avoiding twist
Definitions
- This invention relates to a torque balanced rope, and in particular to a regular lay rope comprising between three and six strands.
- torque balanced ropes There are various types of torque balanced ropes, but those of which we have knowledge are made up of a plurality of layers of strands with the strands in one layer being laid up in the opposite direction to the strands in the adjacent layer. Thus the types of rope are limited and the operation is relatively expensive because at least two laying operations are required.
- Another object is to provide such a rope which has non-rotating characteristics.
- FIG. 1 is a perspective view of a 3 ⁇ 19 seale regular lay rope of our invention.
- FIG. 2 is an end view of a 6 ⁇ 19 seale regular lay wire rope.
- reference numeral 1 indicates a wire rope consisting of three strands, each having a center core wire 4 surrounded by nine intermediate wires 6 and nine outer wires 8.
- the strands 2 are formed in the usual manner except that the lay is shorter than that normally used.
- the strands are formed, roll straightened and then stranded in a stranding machine where the strands are preferably partially preformed. We have found it advisable, and for most uses necessary, to stress relieve the formed rope. When the rope is made of steel, this is done at a temperature between 600° and 1150° F.
- the lay of the strand in the rope is longer than that normally used and it is necessary that the angle of lay of the outer wires in each strand be at least 13/4 times that of the angle of lay of the strands in the rope. This is necessary in order that the torque exerted by the rope will be approximately equal to the torque exerted by the strands.
- a rope so constructed is relatively non-rotating, with the amount of rotation being no greater than 3° per foot of length under loads of up to 75% of the breaking strength of the rope, and in many instances the amount of rotation is even as low as 1° per foot.
- the angle of lay of the outer wires 8 is 21.8° and the angle of lay of the strands 2 is 10°.
- the relationship between the angles of lay be at least 2 to 1 rather than 13/4 to 1.
- the rope of FIG. 2 includes a core member 10 surrounded by six strands 12, each having a center wire 14, nine intermediate wires 16, and nine outer wires 18. Except for the lay of the wires in the strand and the lay of the strands in the rope, this rope is made in the usual manner. In other words, the strands are first formed and the strands then closed around the core 10. The strands are roll straightened and the rope stress relieved as in the first embodiment.
- the relationship between the angle of lay of the outer wire in each strand and the angle of lay of the strand in the rope is preferably greater than in a three strand rope. In the six strand rope shown, the angle of lay of the outer wires 18 is 24.5° and the angle of lay of the strands in the rope is 7°.
- the strands may be of other constructions than those shown but will preferably be those constructions most commonly used.
- the core shown in FIG. 2 may be replaced by other types of cores, such as an independent wire rope core.
- the relationships set forth above are necessary in order to obtain the desired characteristics.
- the wires 6 and 8 are such that they tend to rotate in the direction of the arrows around the axis of wire 4, or in other words, under load they try to straighten out.
- the strands 2 under load tend to untwist from one another in the direction of the arrows and these two torques counterbalance one another so that the wires and strands will not move out of position.
- the wires 16 and 18 tend to rotate in the direction of the arrows and the strands 12 tend to untwist from one another in the direction of the arrows with the two torques counterbalancing each other.
Landscapes
- Ropes Or Cables (AREA)
- Wire Processing (AREA)
Abstract
.Iadd.A torque balanced regular lay wire rope having from three to six strands spiraled together such that the angle of lay of the outer wires in each strand is at least two times greater than the angle of lay of the strands in the rope and said rope is in a stress relieved condition..Iaddend.
Description
This invention relates to a torque balanced rope, and in particular to a regular lay rope comprising between three and six strands. There are various types of torque balanced ropes, but those of which we have knowledge are made up of a plurality of layers of strands with the strands in one layer being laid up in the opposite direction to the strands in the adjacent layer. Thus the types of rope are limited and the operation is relatively expensive because at least two laying operations are required.
It is therefore an object of our invention to provide a regular lay torque balanced wire rope in which the strands are laid up in a single laying operation.
Another object is to provide such a rope which has non-rotating characteristics.
This and other objects will be more apparent after referring to the following specification and attached drawings, in which:
FIG. 1 is a perspective view of a 3 × 19 seale regular lay rope of our invention; and
FIG. 2 is an end view of a 6 × 19 seale regular lay wire rope.
Referring more particularly to FIG. 1 of the drawings, reference numeral 1 indicates a wire rope consisting of three strands, each having a center core wire 4 surrounded by nine intermediate wires 6 and nine outer wires 8. According to our invention, the strands 2 are formed in the usual manner except that the lay is shorter than that normally used. The strands are formed, roll straightened and then stranded in a stranding machine where the strands are preferably partially preformed. We have found it advisable, and for most uses necessary, to stress relieve the formed rope. When the rope is made of steel, this is done at a temperature between 600° and 1150° F. The lay of the strand in the rope is longer than that normally used and it is necessary that the angle of lay of the outer wires in each strand be at least 13/4 times that of the angle of lay of the strands in the rope. This is necessary in order that the torque exerted by the rope will be approximately equal to the torque exerted by the strands. We have found further that a rope so constructed is relatively non-rotating, with the amount of rotation being no greater than 3° per foot of length under loads of up to 75% of the breaking strength of the rope, and in many instances the amount of rotation is even as low as 1° per foot. In the specific rope shown in FIG. 1, the angle of lay of the outer wires 8 is 21.8° and the angle of lay of the strands 2 is 10°. For best results it is desirable that the relationship between the angles of lay be at least 2 to 1 rather than 13/4 to 1.
The rope of FIG. 2 includes a core member 10 surrounded by six strands 12, each having a center wire 14, nine intermediate wires 16, and nine outer wires 18. Except for the lay of the wires in the strand and the lay of the strands in the rope, this rope is made in the usual manner. In other words, the strands are first formed and the strands then closed around the core 10. The strands are roll straightened and the rope stress relieved as in the first embodiment. The relationship between the angle of lay of the outer wire in each strand and the angle of lay of the strand in the rope is preferably greater than in a three strand rope. In the six strand rope shown, the angle of lay of the outer wires 18 is 24.5° and the angle of lay of the strands in the rope is 7°.
It will be understood that the strands may be of other constructions than those shown but will preferably be those constructions most commonly used. Also, the core shown in FIG. 2 may be replaced by other types of cores, such as an independent wire rope core. However, regardless of the construction of the strands, the relationships set forth above are necessary in order to obtain the desired characteristics.
The wires 6 and 8 are such that they tend to rotate in the direction of the arrows around the axis of wire 4, or in other words, under load they try to straighten out. On the other hand, the strands 2 under load tend to untwist from one another in the direction of the arrows and these two torques counterbalance one another so that the wires and strands will not move out of position. In like manner the wires 16 and 18 tend to rotate in the direction of the arrows and the strands 12 tend to untwist from one another in the direction of the arrows with the two torques counterbalancing each other.
While two embodiments of our invention have been shown and described it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.
Claims (9)
1. A torque balanced regular lay .Iadd.wire .Iaddend.rope comprising between three and six strands spiraled together, the angle of lay of the outer wires in each strand being at least . .13/4.!. .Iadd.2 .Iaddend.times that of the angle of lay of the strands in the rope, .Iadd.said rope being in the stress relieved condition, .Iaddend.the torque exerted by the rope being approximately equal to the torque exerted by the strands.
2. A torque balanced regular lay rope according to claim 1 in which the rope will rotate within 3° per ft. of length up to 75% of the breaking strength.
3. A torque balanced regular lay rope according to claim 1 in which the rope is stress relieved at a temperature of between 600° and 1150° F.
4. A torque balanced regular lay rope according to claim 3 in which the rope will rotate within 3° per ft. of length up to 75% of the breaking strength.
5. A torque balanced regular lay rope according to claim 1 in which consists of three strands spiraled together.
6. A torque balanced regular lay rope according to claim 5 in which the rope will rotate within 3° per ft. of length up to 75% of the breaking strength.
7. A torque balanced regular lay rope according to claim 6 in which the rope is stress relieved at a temperature of between 600° and 1150° F.
8. A torque balanced regular lay rope according to claim 1 which consists of six strands spiraled together, the angle of lay of the outer wires in each strand being at least two times that of the angle of lay of the strands in the rope.
9. A torque balanced regular lay rope according to claim 8 in which the rope will rotate within 3° per ft. of length up to 75% of the breaking strength.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US545726A US3374619A (en) | 1966-04-27 | 1966-04-27 | Torque balanced rope |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US545726A Reissue US3374619A (en) | 1966-04-27 | 1966-04-27 | Torque balanced rope |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE29537E true USRE29537E (en) | 1978-02-14 |
Family
ID=24177329
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US545726A Expired - Lifetime US3374619A (en) | 1966-04-27 | 1966-04-27 | Torque balanced rope |
US05/717,310 Expired - Lifetime USRE29537E (en) | 1966-04-27 | 1976-08-24 | Torque balanced rope |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US545726A Expired - Lifetime US3374619A (en) | 1966-04-27 | 1966-04-27 | Torque balanced rope |
Country Status (4)
Country | Link |
---|---|
US (2) | US3374619A (en) |
BE (1) | BE697492A (en) |
ES (1) | ES339681A1 (en) |
GB (1) | GB1177015A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4176513A (en) | 1976-09-07 | 1979-12-04 | Dunlop Limited | Steel wire cord |
US4732831A (en) | 1986-05-01 | 1988-03-22 | E. I. Du Pont De Nemours And Company | Xeroprinting with photopolymer master |
US6260343B1 (en) * | 1998-05-01 | 2001-07-17 | Wire Rope Corporation Of America, Incorporated | High-strength, fatigue resistant strands and wire ropes |
US6619240B2 (en) * | 1998-04-20 | 2003-09-16 | Equibrand Corporation | Lariat, lariat rope body, method and apparatus |
US20130227926A1 (en) * | 2010-11-05 | 2013-09-05 | Nv Bekaert Sa | Compacted hybrid elevator rope |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3772454A (en) * | 1972-11-22 | 1973-11-13 | Steel Corp | Torque balanced cable |
DE3632298A1 (en) * | 1986-09-23 | 1988-04-07 | Saar Gmbh Drahtseilwerk | WIRE ROPE FOR A HANGING INSERT OVER A LARGE HEIGHT DIFFERENCE, IN PARTICULAR CONVEYOR BASKET ROPE, DEEP ROPE ROPE OR ROPEWAY ROPE |
JP5269838B2 (en) * | 2010-07-12 | 2013-08-21 | 株式会社日立製作所 | Elevator wire rope |
US8438826B2 (en) | 2010-10-11 | 2013-05-14 | Wireco Worldgroup Inc. | Four strand blackened wire rope |
CN102747625A (en) * | 2012-06-20 | 2012-10-24 | 贵州钢绳股份有限公司 | Steel wire rope for aviation |
PT2971331T (en) | 2013-03-14 | 2018-11-07 | Wireco Worldgroup Inc | Torque balanced hybrid rope |
CN115045129A (en) * | 2022-07-20 | 2022-09-13 | 济宁长龙钢丝绳有限公司 | Anti-torsion steel wire rope for climbing-free fan tower cylinder and manufacturing method thereof |
CN115679726B (en) * | 2023-01-05 | 2023-04-14 | 青岛鲁普耐特绳网研究院有限公司 | Anti-biological-adhesion plastic-coated steel cable for buoy, preparation method thereof and buoy anchoring system |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US952161A (en) * | 1906-11-01 | 1910-03-15 | George S Whyte | Non-rotating wire rope. |
US1429529A (en) * | 1920-10-11 | 1922-09-19 | Pyburn George | Compound wire rope |
US1885821A (en) * | 1931-10-03 | 1932-11-01 | Roeblings John A Sons Co | Wire rope and method of making the same |
CH170415A (en) | 1933-09-14 | 1934-07-15 | Salvisberg Theodor | Torsion-free stranded rope. |
US2147118A (en) * | 1938-01-15 | 1939-02-14 | American Steel & Wire Co | Wire rope center |
US2372142A (en) * | 1940-06-19 | 1945-03-20 | Jr Richard F Warren | Lubricated rope |
US3035403A (en) * | 1961-06-06 | 1962-05-22 | United States Steel Corp | Stranded wire structures |
US3092956A (en) * | 1960-09-08 | 1963-06-11 | Macwhyte Company | 7-strand wire rope |
US3201930A (en) * | 1963-05-13 | 1965-08-24 | Stirling James | Rope strand and method for making same |
-
1966
- 1966-04-27 US US545726A patent/US3374619A/en not_active Expired - Lifetime
-
1967
- 1967-04-21 GB GB08570/67A patent/GB1177015A/en not_active Expired
- 1967-04-24 BE BE697492D patent/BE697492A/xx unknown
- 1967-04-24 ES ES339681A patent/ES339681A1/en not_active Expired
-
1976
- 1976-08-24 US US05/717,310 patent/USRE29537E/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US952161A (en) * | 1906-11-01 | 1910-03-15 | George S Whyte | Non-rotating wire rope. |
US1429529A (en) * | 1920-10-11 | 1922-09-19 | Pyburn George | Compound wire rope |
US1885821A (en) * | 1931-10-03 | 1932-11-01 | Roeblings John A Sons Co | Wire rope and method of making the same |
CH170415A (en) | 1933-09-14 | 1934-07-15 | Salvisberg Theodor | Torsion-free stranded rope. |
US2147118A (en) * | 1938-01-15 | 1939-02-14 | American Steel & Wire Co | Wire rope center |
US2372142A (en) * | 1940-06-19 | 1945-03-20 | Jr Richard F Warren | Lubricated rope |
US2399157A (en) * | 1940-06-19 | 1946-04-23 | Jr Richard F Warren | Rope |
US3092956A (en) * | 1960-09-08 | 1963-06-11 | Macwhyte Company | 7-strand wire rope |
US3035403A (en) * | 1961-06-06 | 1962-05-22 | United States Steel Corp | Stranded wire structures |
US3201930A (en) * | 1963-05-13 | 1965-08-24 | Stirling James | Rope strand and method for making same |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4176513A (en) | 1976-09-07 | 1979-12-04 | Dunlop Limited | Steel wire cord |
US4732831A (en) | 1986-05-01 | 1988-03-22 | E. I. Du Pont De Nemours And Company | Xeroprinting with photopolymer master |
US6619240B2 (en) * | 1998-04-20 | 2003-09-16 | Equibrand Corporation | Lariat, lariat rope body, method and apparatus |
US6260343B1 (en) * | 1998-05-01 | 2001-07-17 | Wire Rope Corporation Of America, Incorporated | High-strength, fatigue resistant strands and wire ropes |
US20130227926A1 (en) * | 2010-11-05 | 2013-09-05 | Nv Bekaert Sa | Compacted hybrid elevator rope |
US9309620B2 (en) * | 2010-11-05 | 2016-04-12 | Nv Bekaert Sa | Compacted hybrid elevator rope |
Also Published As
Publication number | Publication date |
---|---|
ES339681A1 (en) | 1968-05-16 |
DE1685853B2 (en) | 1975-10-09 |
US3374619A (en) | 1968-03-26 |
GB1177015A (en) | 1970-01-07 |
BE697492A (en) | 1967-10-24 |
DE1685853A1 (en) | 1971-04-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AMSTED INDUSTRIES INC. A CORP OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNITED STATES STEEL CORPORATION A DE CORP.;REEL/FRAME:004322/0092 Effective date: 19840712 |
|
AS | Assignment |
Owner name: USX CORPORATION, A CORP. OF DE, STATELESS Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960 Effective date: 19880112 |