US1027907A - Hoisting-sling. - Google Patents

Description

T. J. SAMMON.

HOISTING SLING.

APPLIUAQION FILED JAN. 20, 1912.

Patented May 28, 1912.

INVENTOR W/TNE88ES 2 COLUMBIA PLANOGRAPH CO-,WA5HINUTON. n. C.

TED STATES PATEN FTQ.

THOMAS JOHN SAMMON, OF NEW YORK, N. Y.

HOISTING-SLING.

gage and bind a load carried by the same,

to prevent any of the bundles or other articles which the sling is designed to lift, from slipping out of place and dropping therefrom.

For this purpose it comprises an arrangement of parts which are movable with re spect to one another, and the parts are operated by the weight of the load which is lifted, to cause them to engage the articles placed in the sling and hold them securelyl of the sling, the upper bar 1 is of course against displacement.

Reference is to be had to the accompanying drawings forming a part of this specification, in which the same characters of reference indicate the same parts in all the views.

Figure 1 is a side elevation, partly in section, taken on the line 11 of Fig. 3; showing my improved hoisting sling as a whole, with a composite load therein; Fig. 2 is a sectional View on the line 22 of Fig. 1;

and Fig. 8 is a top plan of one end thereof.

On the drawings, the numeral 1 repre sents a transverse bar or beam constituting the top of my sllng, and the numeral 2 represents a simllar transverse bar or beam its opposite ends, and these ends have trans- -versely-alined openings 4 therein which register with similar openings 5 in the sleeves 3. Each of the openings at carries a guide wheel 6, mounted upon a spindle 7 To the sides of the upper bar 1, adjacent the ends thereof, are secured plates 8, by means of bolts 9, these plates 8 having eyelets 10 projecting therefrom. One of the eyelets 10 is arranged above each of the openings t in the ends of the bar 2; and to each of the eyelets 10, at one end of the bar 1, is connected the end of a rope or cable 11, this rope or cable passing from the eyelets 10 down around the pulley wheels or guide wheels 6, and then upward through a-per tures 12 in the bar 1, and through a ring Specification of Letters Patent.

Application filed January 20, 1912.

Patented May 28,1912. Serial No. 672,275.

13, which is connected by means of a short length of rope 14, to a ring 15, to which the hoisting cable 16 is attached. There will be two of the cables 11, one at each end of the sling, as will be readily understood, and likewise two apertures 12 at each end of the bar 1, between the plates 8; and the rings 18 through which the cables 11 pass, will of course engage these cables at their mid portions. The cables 11 may be secured to the eyelets 10 by means of rings, or simply by knotting, and the upper ends of the short lengths of rope or cable 14 and the lower end of the hoisting cable 16 may also be secured by knotting, to the ring 15, instead of by rings, as shown. I prefer, however, the arrangement of rings illustrated.

The load is indicated at 17, and is shown as of a composite nature, comprising a barrel and a pair of boxes of unequal size. When the load is placed on the lower bar 2 raised high enough to permit the articles to be hoisted to be placed between the bars 1 and 2. The ropes or cables 15 are then drawn taut; rotating the pulleys or wheels 6 on their spindles 7, and pulling down upon the eyelets 10 to cause the upper bar to engage the top of the load. As traction is applied to the hoisting cable 16, the sling is lifted, and the traction on cable 16'at one end, together with the force exerted by the weight of the load of the other end, will exert a tension on the portions of the cables 11 between .the pulleys 6 and the rings 13. This tension will of course be transmitted to the portions of the cable 11 between the pulleys 6 and the eyelets 10, and the result will be that the upper bar 1 will be drawn down tightly upon the top of the load to bind the boxes, barrels and other articles or packages constituting the same, in place. The bars 1 and 2 thus constitute in effect a pair of jaws which are operated to grip the articles constituting the load, securely between the same by a force at least equal to the weight of the load that is being lifted.

The numeral 18 represents a hook carried by the upper bar 1, and this hook is for engagement with the ring 15 at the end of the hoisting cable 16, to enable the sling to be moved about empty and at the same time kept in readiness to receive its load. Unless some means are provided for keeping the upper and lower bars 1 and 2 separated, the bars 1 and 2 will come together whenever the sling is lifted, if there is no load between them. This is because the tension 011 the cables, owing to the weight of the sling itself, will be sufficient to draw the bars 1 and 2 together; and the jaws formed by these bars 1 and 2 would thus have to be separated when the sling reaches the point at which the freight is to be moved, at the expense of additional time and labor. The hook: 18 thus enables the operator to prevent the collapsing of the sling, and effects the saving of time and labor which would otherwise be lost.

My improved sling can be employed to lift almost anything, whether the same be packed in boxes or barrels, or simply in bags, as I may pad the adjacent surfaces if the bars 1 and 2 in case the nature of the articles to be lifted requires it.

The sling which I have shown and described herein can ofcourse be made with a single pulley at each end, and a single eyelet, if desired; and I wish to have it understood that the description and accompanying drawings disclose but one embodiment of my invention, and that I do not care to be limited to the details thereof, except in so far as is indicated in the accompanying claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a hoisting sling, the combination of an upper bar and a lower bar, the said lower bar carrying sleeves on its opposite ends and having an aperture at each end, said sleeves having apertures in their upper sides to register with the apertures in the lower bar, pulley wheels mounted in said apertures in the lower bar, a rope or cable secured to each end of the upper bar and passing down around the pulley wheel carried in the adjacent end of the lower bar sa1d upper bar having apertures 1n its op posite ends through which said ropes or cables move after passing around the pulley wheels, and means for connecting said ropes or cables to a hoisting cable, the said bars constltuting a pair of movable jaws to grip the load carried by the sling, between them and prevent displacement thereof.

2. A hoisting sling comprising an upper bar and a lower bar, guide pulleys carried in opposite ends of the lower bar, plates secured to the sides of the upper bar adjacent the opposite ends thereof and having eyelets projecting therefrom, a rope or cable secured to each of said eyelets and passing down around the pulley in the adjacent end of the lower bar, said upper bar having an aperture for each of said ropes or cables, through which the same moves after passing around the pulley in the lower bar, and means for connecting said ropes or cables to a hoisting cable, said upper and lower bars constituting a pair of movable jaws for gripping the load carried by the sling, between them and preventing the displacement of the same.

3. A hoisting sling comprising an upper bar and a lower bar forming a pair of gripping jaws, the said lower bar carrying sleeves on its opposite ends andl having apertures in its ends, said sleeves having apertures in their upper sides to register with the apertures in the lower bar, pulley wheels mounted in said apertures in the lower bar, plates secured to the sides of the upper bar adjacent the opposite ends thereof and having eyelets projecting therefrom,

a rope or cable secured to each of said eyelets and passing down around the pulley in the adjacent end of the lower bar, said upper bar also having an aperture for each of said ropes or cables through which the same passes after passing around its respective pulley in the lower bar, and means for connecting said ropes or cables to a hoisting cable, whereby, when the hoisting cable is pulled, the bars will be drawn together to secure the rope between them.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS JOHN SAMMON.

l/Vitnesses J OHN D. HARRIS, M. ANNIE McRAE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.

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