US1314397A

US1314397A - Cabgo-slusfok

Info

Publication number: US1314397A
Authority: US
Publication date: 1919-08-26
Anticipated expiration: 1936-08-26

Description

l. HEFFRON.

CARGO SLING. APPLICATION FILED APR. 2. IsIa.

` PanIedAug. 26,1919.

ISAAC HEFFBON, OF GALVESTON, TEXAS.

oARGo-sLING.

' Specification of Letters Patent; Patented Aug, 26,o 1919.

Appncanbn mea April 2, 191s. semi No. 226.263.

To all whom it may concern l f l Be it known that I, ISAAC Harmon, a citizen of the United States, and a resident of Galveston, in the county ofGalveston and State of Texas, haveinyented certain new andV useful Improvements in Cargo-Slings, of whichthe following is a specification.

My invention relates to improvements in cargo slings, and it consists inthe constructions, combinations and arrangements herein described and claimed. y

An object of, my invention is tol provide an improved cargo sling to 'be used in loading and discharging the cargo of a ship, one of the important features of the sling being thel lflexible and slatted base which by reason of its peculiar construction readilyconforms itself to` variously shaped objects.

Another object of the invention is to provide a cargo slino' including a flexible support consistingl of longitudinally disposed cables, having a plurality of slats mounted thereon by slotting the Aendsof the slats to receive the cables, said slats being slidable on the cables and thereby readily conforming to variously shaped objects.

Another object of the invention is to provide a. cargo sling of such construction and consisting of parts of such a nature that they may be employed to make, cargo slings of various lengths should it become necessary to do so.

Another object of the invention is to provide a cargo sling comprising a flexible slat support formed with a loop in one end, and having a rope loop at the other end adapted to be threaded through the support loop, providing a' single suspension and at the same time, providing means for automatically tightening the sling on the load.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawing in which:

Figure 1 is a plan view of the cargo sling illustrating the use of a single wire cable,

Fig. Q is a plan View of the cargo sling illustrating the use of a pair of strands to form the flexible support,

Fig. 3 is a cross section on the line 3*-3 of Fig. 2, and

Fig. l is a. detail cross section on the line 1 -4 of Fig. 3.

In carrying out my invention I provide in one of the forms of the invention a flexible support consisting of a wire cable 1 which takes the shape of a loop substantially as shown in Fig. 1. A leather chafiug piece 2 is fitted on the bight of the wire cable 1 A and the free ends of the cable are formed into eyelets 3 `in which metallic thimbles el are fitted.

'.lhe ends of a rope .loop 5 are attached to the eyelets El, and the bight of the loop 5 is intemled to be threaded through the bight of the cable 1 and attached to the hook of the hoisting mechanism in lifting the load. The dual function of providing a single suspension and automatically tightening the cargo sling upon the load is thus performed.

h'louuted crosswise of `the wire cable or loop l is a plurality of slats 6 which are made of wood or any other suitable material and have slots 7 cut into the opposite ends to provide recesses which are occupied by the llexible supports. Bolts S or other readily removable means are ixed in place through the ends of the slats (i as shown in Fig. 3, and provide keepers for the flexible supports. It will be observed that the slats are freely slidable upon the flexible supports `and thus readily conform themselves to the object which is being conveyed.

To facilitate the relative movement of the slats G, the longitudinal edges are rounded as at 9. The advantage of rounding the edges of the slats will be readily appreciated when it is understood that in bending the cargo sling upwardly as in conforming it to the load7 the various slats rotate one upon the other and were it not for the rounded edges as just described, there would be a certain amount of binding of edge upon edge and this would have an undesirable effect in actual practice. It will be observed in Figs. 1 and Q that the end slats 6 gradually diminish in length so that the ends of the base taper slightly. The purpose of this tapered formation is, to gradually bend the parts of the cable 1 toward the bight in the cable 1 and in the rope loop 5. Obviously were it not for this tapered formation, the bend in the parts of the flexible support would be too sudden where it leaves the end slats, thus causing undue wear on the flexible support.

A slightly different form in the flexible support is shown in Fig. 2. Here the flexible support 1 consists of a pair of strands with eyelets 3 in each end. These eyelets have metallic thimbles and the ends of the rope loop areattachedinone pairy of thesel'eye lets as shown, while a short rope section 10 is secured between the other two eyelets. Both of the forms of the invention operate the saine, but it is conceivable that thefform of the invention shown in F ig. 2fmay have some advantages over. the form shown in Fig. 1.

The strands l in Fig. 2 may be made in various lengths, that is to say a sup-ply of strands ofv'arious lengths may be kept on hand. Similarly, a supply of the slats 6 may be kept on hand and should it be desired to make a longer cargo sling, a pair of strands of a suitable length are selected and then the slats are attached by' simply removing` and replacing the bolts 8 so that the slats are fitted in positionon the strands.

One of 4the important features of the invention resides in the arrangement of attaching the slats tothe flexible supports. It will be observed that the flexible supports are well housed within the ends of the slats and thus are thoroughly protected from damage as would ordinarily result by the rough usagey to which the cargo sling is put. In operation the load is simply placed on the base of the sling which consists of the slats 6, and the bight of the rope loop 5 is passed through the bight of the flexible support and then is attached to the hook of the hoisting apparatus. On pulling upwardly, thecargo sling tightens upon the load and the slatted base at once conforms vto the shape of the load. nal edges 9 illustrated more particularly in Fig. 4, make it possible to do this more rapidly than would yotherwise be the case. As was Aformerly explained, the absence of sharp edges Ion the slats 6 prevent wedging,^bind ing and breaking of the slatsand thus'the The rounded longitudi` eijiciency of the cargofsling is greatly enhanced.kr 'f While the construction and arrangement of thecargoslingas illustrated in the accompanying drawings, is that of a generally :preferred form, obviously modiiications and changes may be made without departing p fromthe spirit of the invention or the scope ble vload supporting"basel carried by said cable, comprising slats'flhaving rounded adjacent edges 'to facilitatetre'lative lmovement and' provided with1 slottedends to receive and housethe-'side membersr of the cable;

and means extending4 through said slotted nds forming keepers for said cable memers.

' 2'. A cargo sling, comprising longitudinal :HeXible supportsv consisting o'f `a looped cable with'a `bightia't oney end having protecting means atpne end and eyeletsat the other, av slatted base* spanning the flexible supports, the slatsfof said basev having'slotted ends with retaining melansfor receiving 'and keeping' fthe support in a protected position, the ends ofsaid slottedv base being tapered to gradually lead said" supports to the regions of ,the bightand1 eyelets; and a rope loop attached Ato saide'yelets, adapted to be drawn through the cable loop in lifting'aload.

ISAAC HEFFRON..`

Vitnesses: f` FRANK M. QUIN,

WV. LUBBN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D./C."