US1690846A - Rope or cord - Google Patents

Description

C. A. TURNER Nov. 6, 1928.

ROPE OR CORD Filed April 1926 HORNE) Patented Nov. 6, 1928.

UNITED STATES CLAUDE A. TURNER, OF SHERBROOKE, QUEBEC, CANADA.

ROPE OR CORD.

Application filed April 7, 1926. Serial No. 100,243.

My invention relates to rope or cord of the type having a core a comparatively cheap fibrous material such as manila, sisal, jute or the like and a cover enclosing the core and consisting of a more expenslve braided material such as cotton.

The object of the invention is to provide a new' and improved rope or cord of thi. type which possessesgreatertensile strength, has less tendency to shrink or kink and may be more economically manufactured than rope or cord of this type heretofore known.

To this end my invention consists broadly stated of a rope consisting of a plurality of Strands separate and distinct trom each other and disposed in relatively straight parallel arrangement and a braided cever, the strands being formed of long fibres twisted helically and the strands being grouped together with the twist of the fibres of each strand in the same direction as the fibres of the adjoining strands. V p

For full comprehension, however, of my invention, reference must be 'had to the accompanying drawings in which similar reference characters indicate the same parts, and wherein:

Figure 1 is a fragmentary perspective view of a rope or cord made according to my invention;

Figure 2 is 'a transverse sectional view taken on line 22 Figure 1; and

Figure 3 is a longitudinal sectional View of section of my improved rope and illustrating particularly the arrangement of the strands of the core.

The accompanying drawings illustrate the preterred embodiment of my invention. This embodiment consists of an axial core 2 enclosed within a braided cover 3 the latter snugly fitting around the core and coasting therewith in presenting a solid cross-section.

The core is preferably made of manila,

- sisal or jute and consists of a plurality of strands, four being illustrated, as at 4, disposed in straight parallel arrangement throughout the rope, the fibersrof the inclividual strands being twisted helically in the same direction. The arrangement of the fibers is believed to be the most practicable for the reason that the twist of the fibers of each strand being in the same clirection as the twist of the fibers of adjoining strands, any tendency to untwist is counteracted and consequently the core is maintained at its original strength. Y

The cover 3 comprises a plurality o braided cotton threads 6 all of which extend helically around the core .in snug engagement therewith and the direction of the helix is the reverse of the direction in which the strands of the core are twisted, and also counteracts any tendency to untwist.

The foregoing construction provides a rope which owing to the use of a core of a, cheap fibrous material it may be manufactured at a comparatively low cost, and, owing to their straight line arrangement, the strands of the core possess relatively great tensile strength and permit the use of a greater number ofstrands in a cord of a given diameter than would be possible ifthe strands of the core were twisted around one.

another.

Actual tests'of my improved rope have.

posed of a plurality of separate and distinct I strands individually twisted and disposed in straight parallel engagement and in close contact forming a unitary untwisted core, and a cover embracing the unitary core and consisting of braided strands in spiral arrangement around the core and extending in the same spiral direction as the twisted individual strands of the core, and at a wider angle to the said strands of the core.

In testimony whereof I have signed my name to this specification.

CLAUDE A. TURNER.

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