US328350A

US328350A - Self-adjusting chain sling

Info

Publication number: US328350A
Authority: US
Publication date: 1885-10-13
Anticipated expiration: 1902-10-13

Description

(No Model.)

Patented Oct. 13, 1885.

INVBNTOR WITNESSES ATTORNEYS.

N. PETERS, Photvumngnphur, Waxhingtn. D. C.

Iberian Srarns PATENT Orrica,

VIIIIIIAM SlllllII, OF BROOKLYN, ASSIGNOR TO FREDERICK MASKIELII, OF ASTORIA, NEW YORK.

SELF=ADJUSTING CHAIN SLING.

SPECIFICATION forming part of Letters Patent No. 328,350, dated October 13, 1885.

(No inodeLl To aZZ whom, it may concern:

Be it known that I, XVILLLIM SMITH, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Self Adjusting Chain Sling, of which the following is a l'ull, clear, and exact description.

My invention relates to the construction of a chain sling designed more particularly l'or Io use in grappling submarine rocks, but being also applicable for slinging boxes or barrels that are to be moved i'roin story to story; and to these ends the inveuliou consists of a number ol chains, preferably liour, that are con I5 neeted at their upper emls with a ring and carry smaller rings at their lower ends, each chain being arranged to pass' through the lower ring ot' one ot' its neighb ring chains; but all the chains in the sling pass through 2o the rings of chains that are upon the same side.

Reference is to be had to the accompanying drawing, forming a part of this specilication, which isa perspective view ol'l my improved chain sling, representing the same as in position to elevate a rock.

Four chains. a, I), c, and d, that are equal in length, are fixed or secured to a heavy npper ring, A. The chains referred to carry links or rings d', b', c', and d', respectively, said rings or links being secured to the lower ends ofthe chains. Each of the chains passes through the lower link or ring of the chain lo its right or left-that is, the chain c passes through the link cl, the chain b through the link c', the. chain c through the link b', and the chain d through the link c'-or the chains could be passed through the links ol" t-he chains upon their opposite sides.

The ring A is hooked upon the hook B of the block O, which constitutes a portion of the ordinary forni ot' hoisting-tackle.

nWhen it is desired to remove submarine rocks or obstructions, a diver is employed to .45 adj ust the sling, which he does by pulling the chains through the rings or links through which they pass until hc has formed a loop large enough to encircle the rock or other obstruction, which loop he passes over the article to be removed, allowing the loop to 5o rest upon the bottoni at the sides of the article. rI he tackle is then started to slightly elevate the sling until all slack is drawn up, when it will be found that the lengths ot' chains projecting through the-links and forming the loop about the rock or other article to be Inoved will be drawn up tight against the un der sides ofthe rock, so that when the tacklt` is operated to raise the sling the rock will be iirnily held and may be raised to the surface co and deposited as the operator desires.

lf it is desired to secure the chains more closely about the rock, I provide'a ring, D, which, when not in use, is suspended -from a hook, E, that is carried by the ring A, as shown in dotted lines; but when it is necessary to tighten the chains about the sides of the rock the ring l) is forced down to the position shown in full lines, this being done before the slack is taken out of the chains.

Although I have illustrated and described the sling as being composed of four chains, it might be made with only three, or in some cases the number of chains might be increased to five or six or more, and it will readily be seen that the sling could be used for hoisting boxes and barrels, as well as rocks.

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

l. A chain sling consisting of a number of chains united to an upper link or ring, each chain carrying a link or ring at its lower end, and each chain passing through the link carried by the adjacent chain upon one side, substantially as described.

2. In a chain sling, the combination, with a number of chains united to an upper link or ring, each chain carrying a link or ring at 'its lower end, and each chain being passed through ooi the lower link of the chain to the right or left, all chains, however, passing through links in the saine direction, ol' a ring, 14),"su bstantiall y as described.

WILLIAIWI SMITH. Witnesses:

Ron H. SMITH, THOMAS R. SIMPSON,