US1660065A - Rope - Google Patents

Rope Download PDF

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Publication number
US1660065A
US1660065A US162898A US16289827A US1660065A US 1660065 A US1660065 A US 1660065A US 162898 A US162898 A US 162898A US 16289827 A US16289827 A US 16289827A US 1660065 A US1660065 A US 1660065A
Authority
US
United States
Prior art keywords
yarns
rope
core
cover
fibres
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
Application number
US162898A
Other languages
English (en)
Inventor
Ellis W Brewster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PLYMOUTH CORDAGE CO
Original Assignee
PLYMOUTH CORDAGE CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL22755D priority Critical patent/NL22755C/xx
Priority to BE348237D priority patent/BE348237A/xx
Application filed by PLYMOUTH CORDAGE CO filed Critical PLYMOUTH CORDAGE CO
Priority to US162898A priority patent/US1660065A/en
Priority to GB1440/28A priority patent/GB283956A/en
Priority to FR647489D priority patent/FR647489A/fr
Application granted granted Critical
Publication of US1660065A publication Critical patent/US1660065A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/02—Making ropes or cables from special materials or of particular form from straw or like vegetable material

Definitions

  • This invention relates to improvement in rope. More particularly it provides an improvement in ordinary rope; that is, in rope consisting wholly of long and strong vege- 6 table fibres such as hemp or sisal.
  • the invent-ion resides in the discovery of a articular arrangement of" elements by w 1i ch utility, strength, flexibility and durability are very considerably improved as compared 10 with rope made from the same material according to standards generally accepted as ood. It is one feature that the invention permits .of rope being made with a relatively softer and therefore with greater strength, than heretofore; while maintaining in the strand a sufficient stability of form and a sufficient resistance .to surface abrasion.
  • the invention 'both preventsba'clg'kinking, which is .particularly liable to o'ccur in aloosely laid rope, and provides greater strength per v rope. It has been. found in practice that such a rope has longer life, as compared with a 2 rope of equal diameter but of standard 'con- 'struction, and that'it retains greater strength than is customary with standard rope after any lmeasure of service which may have been adopted for comparison.
  • the rope .of the invention is easier to splice, iseasier to handle when in service, and is subject to less liability of being damaged by unskillful handling as by being drawn from a coil inthe wrong wa' By its superior stability it enables'the ubricant within it,
  • the pitch of yarns in core and in cover may be equal or diverse, but the difference in directionof lay prevents the outside yarns from ever being drawn into the valleys between yarns of the core when a finished rope is twisted reversely. As neither untwisting nor further twisting of. such a soft laid rope will seriously disturb the structure of any of the strands, the rope can easily resume its normal structural form after any such chance twisting.
  • the individual twist of the yarns at the surface can be as hard as desired.
  • the figure is a side elevation of a rope embodying the invention with one end unlaid to indicate construction, and the relations of fibres and yarns within.
  • each strand 10 is homogenous, in that it is is composed wholly of long vegetable fibres, such as hemp. These fibres are grouped in yarns 14 which are individually twisted. As illustrated in the figurethe yarns in each strand are arranged in two groups, one of which,;12,'includ1ng 12', is twisted as a group in one direction, herein being called a core," while the other, 16, herein.
  • a cover is laidin a sheath around the core 12 in a direction opposite to the twistof the core.
  • the relative-pitch of these two twisted groups may be such that when the rope is stretched the fibres in each group will reach their breaking-tension" at about the same distance of stretch of the rope; as a whole.
  • the -described construction provides a rope'which has in the interior of each strand a substantial body 12-of yarns with lay in the same direction as the lay of the strand in the rope; and has exteriorly in each strand av body of cover yarns whose lay everywhere.
  • the interior group of yarnsl2 in the core is preferably twlsted with the case illustrated all of them together do not make as many yarns as are. in the cover. This, however, is a matter to be given congroup of core yarns surrounding it, as in the sideration when anyparticular'rope is de signed, and-if the interior body 12' were so large that the dangers indicated above were liable to arise, the remedy indicated. herein should be applied by reversing their direction of lay with respect to the outer yarns 12 of the core.
  • the yarns 14 are made according to ordinary methods of suchmatei'ial or mixture and of such size and degree of twist as may be considered e; and then for-the making ofthe core 12 a bundle of such yarns is twisted, so that its'yarns are, for example,-laid to the right, using machinery of any suitable type operating upon principles already known. Over thiscore the cover yarns are laid in the opposite direction. For ordinary purposesthis would complete a strand, 10.
  • the threeestrands 10,- or whatever other number of strands is to beused, may then be twisted together to make a rope-in the usual manner, preferably (laid at a pitch which is longer than .what is considered safe and necessary inrope made for the same duty but of the type at present standard in the rope industry.
  • a rope composed of a plurality of strands twisted together, each of said strands having a core of yarns of long vegetable fibres, said yarns bein twisted together, and a cover of yarns of laid around the core in direction opposite to the twist of the core.
  • a rope composed of a strands twisted together, each of said strands having a core of yarns twisted together and a cover of yarns twisted around the core in direction opposite to the twist of the core the said yarns in core and cover being sevplurality of s is at the end of the period still in good condition.
  • long vegetable fibres erally coinposed of long vegetable fibres twisted together to make the several yarns; the twist of individual yarns in the core being opposite in direction to the twist of individual yarns in the cover.

Landscapes

  • Ropes Or Cables (AREA)
US162898A 1927-01-22 1927-01-22 Rope Expired - Lifetime US1660065A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL22755D NL22755C (en, 2012) 1927-01-22
BE348237D BE348237A (en, 2012) 1927-01-22
US162898A US1660065A (en) 1927-01-22 1927-01-22 Rope
GB1440/28A GB283956A (en) 1927-01-22 1928-01-16 Rope
FR647489D FR647489A (fr) 1927-01-22 1928-01-19 Perfectionnements aux cordes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US162898A US1660065A (en) 1927-01-22 1927-01-22 Rope

Publications (1)

Publication Number Publication Date
US1660065A true US1660065A (en) 1928-02-21

Family

ID=22587580

Family Applications (1)

Application Number Title Priority Date Filing Date
US162898A Expired - Lifetime US1660065A (en) 1927-01-22 1927-01-22 Rope

Country Status (5)

Country Link
US (1) US1660065A (en, 2012)
BE (1) BE348237A (en, 2012)
FR (1) FR647489A (en, 2012)
GB (1) GB283956A (en, 2012)
NL (1) NL22755C (en, 2012)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438864A (en) * 1945-01-10 1948-03-30 Plymouth Cordage Co Rope
US2477652A (en) * 1946-03-01 1949-08-02 Robbins Chandler Mixed yarn and fabric
US5333442A (en) * 1990-07-16 1994-08-02 American Manufacturing Company, Inc. Method for producing a rope having superior friction and wearing resistance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438864A (en) * 1945-01-10 1948-03-30 Plymouth Cordage Co Rope
US2477652A (en) * 1946-03-01 1949-08-02 Robbins Chandler Mixed yarn and fabric
US5333442A (en) * 1990-07-16 1994-08-02 American Manufacturing Company, Inc. Method for producing a rope having superior friction and wearing resistance

Also Published As

Publication number Publication date
BE348237A (en, 2012)
FR647489A (fr) 1928-11-24
NL22755C (en, 2012)
GB283956A (en) 1928-07-12

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