US 2357182 A
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Description (OCR text may contain errors)
Aug. 29, 1944.
G. FARMER SLING Filed Jan. 13, 1944 Gidarm e7 Patented Aug. 29, 1944 UNITED STATES PATENT OFFICE SLING George G. Farmer, Washington, D'. C.
Application January 1?', 1944, Serial No. 518,147
This invention relates to slings engageable about an article for elevating or lowering the article.
An object of this invention is to provide a sling of this type which includes a pair of crossed cords or ropes provided with means whereby the ends may be detachably connected together, one cord having a short length cord spliced thereto adjacent the crossing of the two cords, the short length cord providing a means for engagement with a lifting hook whereby the sling will be tightened about the article as the latter is lifted.
Another object of this invention is to provide a sling forward of a pair of crossed cords connected together at their crossing point, and one cord including a short length cord connected at its ends to the said one cord and spanning the crossing between the two4 main cords, and the short length cord being of less length than the normal distance between its connection with the one main cord.
With the foregoing objects and others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be referred to and illustrated in the accompanying drawing wherein is shown an embodiment of this invention, but it is to be understood that changes, variations and modifications may be referred to which fall within the scope of the invention as claimed.
In the drawing:
Figure 1 is a perspective View of a sling constructed according to an embodiment of this invention showing the sling in applied position, and
Figure 2 is a plan View of the sling partly broken away.
Referring to the drawing, the numerals I and I I designate a pair of elongated flexible members, such as cords 0r ropes. The cords I0 and II are disposed in crossed relation and are connected together at their crossing point as indicated at I3.
There is a loop or eye I2 at one end of cord IIJ,
The lifting cord I1 extends right angularly across cord I I and when the sling is stretched out flat, as shown in Figure 2', cord I'I forms a triangle with cord I0. However, when a lifting hook I4, as shown in Figure l, is engaged with the center of cord II, this latter cord forms a substantial parallelogram with cord ID. The provision of the lifting cord or member I1 provides for tightening of cord I0 about the article B when the hook I4 is engaged with cord II, and the strain of the lift is borne almost entirely by cord I0.
In the use of this sling, cord I0 is extended about the article B and hook I4 engaged with loop I2. Cord II is extended about the article B at right angles to cord Ill and hook I6 engaged with loop I5. Lifting hook H may be engaged with lifting cord I1, and as this cord receives the weight of the article B, cord I1 will form a parallelogram with cord I0, and the latter will be pulled tightly about the article from the splice points I8 and I9.
What I claim is:
1. A sling comprising a pair of crossed cords spliced together at their crossing point,l coupling means at the ends of said cords, and a cross cord spanning said crossing point and spliced at its ends to one of said crossed cords whereby said cord will be tightened about an article as the latter is lifted.
2. A sling comprising a pair of elongated flexible members disposed in crossed relation and spliced together at their crossing point, coupling means at the ends of said members, and a' iiexible tightening member spliced to one of said members and extending over said crossing point, said tightening member forming a parallelogram with said one member upon engagement of a lifting element with said tightening member.
3. A sling comprising a pair of elongated ilexible members disposed in crossed relation and spliced together at their crossing point, a loop at one end of each member, a hook at the opposite end of each member engageable with said loop, and a flexible tightening member spliced to and forming part of one of said members and extending over said crossing point; said tightening member forming a parallelogram with said one member upon engagement of a lifting element with said tightening member.
GEORGE G. FARMER.