US4714A

US4714A - Robert s

Info

Publication number: US4714A
Authority: US
Publication date: 1846-08-26
Anticipated expiration: 1863-08-26

Description

UNITED STATES PATENT GEEIcE.

ROBERT S. NEWALL, OF GATESHEAD-UPON-TYNE, ENGLAND.

lMPROVEnMENT IN. METALLIC ROPES.

Specification forming'part of Letters Patent No. 4,714., dated August 2G, 1846.

To all whom, t may concern:

Be it known that I, ROBERT STIRLING NEW- ALL, of Gateshead, in the county of Durham,

England, have invented certain new and usegether to form a rope in such, a manner that' the individual wires were twiSted-that is, were subjected to torsion round their own axes rially impaired. The wires were also laid together in such a manner that they were not at equal distances from the center of the strand. They were therefore of unequal lengths and 'subjected to unequal strains.

The strands also'were at unequal distancesy from the center of the rope, and were therefore defective for the same reason.

The nature of my invention consists in manufacturing wire ropes in such a manner as to carry 'out the followingr two new principles, namely: the preventing the wires from being twisted ih themselves and the keeping them equidistant from the center ofthe strand and the strands equidistant from the center of the rope.

Myinvention also consists in a new method of inserting fresh wires or strands when laying the wires into a strand or th'e strands into a rope.

To enable others skilled in the art to make and use my invention, I will proceed to describe' an arrangement ot' machinery for carrying the above principles into effect, refer` ence being had to the annexed drawings, making part of this specification.

Figure l is a sectional side view of a machine for making a strand ot six wires or a' rope of six strands. Fig. 2 is an end view showing the arrangement of the Wheels m n orednced to a plane. Fig. Sis a plan.

NOTE: In the drawings some of the wheels are represented without teeth.

The machine consists of a shaft a, supported in bearings b b. It carries two sets of arms c c. The spindles d CZ are supported in bearings e e in the ends of the arms c c and carry the bobbins f, each of which contains and their strength was thereby mateone wire. The bobbins turn on center pins having a screw and nut at. one end. An equal tension, isgiven to each bobbin by means of a spring p with a regulating-screw.

For the purpose of preventing the wires from being twisted a motion must be given to each in the reverse direction of the lay of the strand. This is done by fixing a toothed wheel in onto the end of each spindle d. These wheels m and the center wheel o are all of the same size. The center wheel o is fixed to the bearing b, the shaft a passing through it. The intermediate wheels n, work into the wheels m and 0and as the machine revolves the spindles d will therefore revolve onc'e in the reverse direction for each revolution of the machine, and thus prevent the wires from being twisted in laying the Wires into a strand, which are afterward laid into a rope bya similar but larger machine. i

In order to keep thel wires equidistant from the center of the strand and the strands equi-I distant from the center of the rope when the number exceeds three, they are laid round a core (which maybe of hemp or other suitable material) of sufficient size to fill up the space formed by t-he wires and strands when arranged in a circle and touching one another. This is shown in Figs. 4 and 5, which are sec- -tions of a strand of six wires round a core and of a rope of six strands round a core. This number I prefer to any other, but do not confine myself to it. The wires pass from the bobbins f through holes in the end of the spindles d and in the end of the shaft ci, and meet beyond the laying-plate g, (hereinafter described) where they are laid into a strand round the core h, which is Wound on the bobbin h and passes through a hole in the shaft a and through the center of the laying-plate p g. The strand is drawn by the drum fr', round which it passes several times to obtain sutiicient friction to prevent its slipping. It is then Wound on the drum 7a, to Which motion is given by the pulleys and belt l Z.- The requisite motion is given to the drum t' by means of wheels and pinions, as shown by the drawings. An index being employed to count the number of revolutions ofv the drum t', the length of the strand or rope may be easily ascertained. l

I recommend that wire ropes should not be so hard laid as hemp ropes. I find that a very good proportion ls as follows: diameter of rope, one-hall", five-eighths, three-fourths, seven-eighths, one, and one and one-eighth inches one revolution in six, seven, eight, nine, ten, and eleven inches-that is, in making a half-inch rope the machine shall revolve once while' the rope is drawn a length of six inches, and so on; and I recommend that the strand should have double the lay of the rope-that is, in making a strand ofa size necessary to `make a six-strand rope of half an inch diameter the machine shall revolve once While the strand is drawn a length of three inches, and so on.

The laying-plate g, Fig. 6, is of use chiefly in inserting a fresh wire. The plate is fixed by means of rods at a distance (three feet for larger ropes) from the end of the shaft a, so that it revolves with the shaft, and is so made that the holes or slits through which the Wires pass are at equal distances from each other and from the center, which is essential to be attended to in laying the wires regularly. The fresh Wire or Strand is inserted in the following manner: Suppose the wires are laid till an end is Within three feet (for a rope of one inch diameter an-d less for smaller ropes) of the laying-plate. The empty bobbin is replaced by a full one. The core is cut close to the apex of the cone formed by the wires at g. The end of. the fresh wire is passed through the hole in the spindle d and shaft a, and passing through the center of the laying-plate g takes the place of the core. The machine revolves and lays half the length of the remaining end, which is then taken out of its place and put in the center, While the ner Wire is brought from the center and put in the place occupied by the old one,

which now forms the coro. The remaining halt is then laid and the core is again inserted and the laying of the strand continned. Thus the two ends of the Wires cross one another and are rmlyheldin their place by friction.' I prefer this mode 0E joining to brazing or twisting the ends together.

Having now described ameans of carrying my invention into effect,l wish it to be unders'tood that I do not claim vthe machinery above described as my invention, although it was invented by me, because many other methods of arranging machinery for making wire ropes on the principles I have discovered may be invented; but

Iclaim as myinveution and desire to secure by Letters Patent- 1. Forming each strand by Winding Wires spirally around a flexible core Without twisting the wires and forming the rope by the winding of such strands in the same manner around a similar core, the core of the strand being about equal in size to the Wires, so that every Wire in the spiral of each strand shall be laid equidistant from the center of such strand and every strand equidistant from the center of the rope.

2. A method of insert-inga fresh wire or wires or a fresh strand or strands in laying the wires into the strand or the strands into the rope made as above when six wires are used in making the strand or six strands used in making the rope.

R. S. NElVALL.

Witnesses:

HENRY INGLEDEW,

Public Notary, Newcasle-upon- Tyne. XVM. SWEET,

His Clerk