US1168802A

US1168802A - Hoisting and similar sling.

Info

Publication number: US1168802A
Application number: US75259513A
Authority: US
Inventors: Noble C Harrison
Original assignee: ROEBLINGS JOHN A SONS CO
Current assignee: JOHN A ROEBLING'S SONS Co; ROEBLINGS JOHN A SONS CO
Priority date: 1913-03-07
Filing date: 1913-03-07
Publication date: 1916-01-18
Anticipated expiration: 1933-01-18

Description

N. C. HARRISON.' HOISTING AND SIMILAR SLING.-

APPLICATION man MAR. 7. 1913.

1 168,802, Patented Jan..18, 1916.Y

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L w Le Jef e Ison, or Enron, New JERSEY, AssIeNon ro Joan A. noEBLINGs BONS COMPANY, A GOB'PORATIDN OF NEW JERSEY.

Horsrrne AND SIMILAR suns.

' Speciicetion of Letters atent.

Application filed March 7, 1918. Serial No. 752,595.

T0 all whom 'it may concern.'

Be it known that l, NOBLE C. HARRISON, a citizen of the United States, residing at rlrenton, county of Mercer, and State of New Jersey, have invented certain new and useful Improvements in lloisting and Similar Slings, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of the present invention is to provide an improved sling, intended particularly for hoisting and handling girders, beams, and similar heavy building material in the erection of the modern high buildings and for anchor connections for derrick guys, but applicable generally for hoisting, anchoring and similar purposes.

The especial object is to provide a wire rope sling that shall be durable, not liable 'to wear or cutting by contact with the sharp edges of beams or other loads or anchorage, and which hat the same time shall be convenient of inspection for detection of wire weakness, so that the hoisting and handling of heavy loads may be rendered' safe and accidents due to parting of the sling be avoided.

rthere is shown in the accompanying.

drawings two forms of sling embodying the invention in preferred. forms, and these slings will now be described in detail, and the features forming the invention then speciiically .pointed out in the claims.

Figure 1 shows a column slingembodying the invention in one of ,its preferred forms, which also may be used as an anchor Iconnection sling. Fig. 2 is a side view of the same sling in position of use with the eye at the hoist end passed through the eye at the load end for holding the load. Fig. 3 iS a longitudinal central section of a portion of the slingof Figs. 1 and 2. Fig. 4 is a section on the line 4 of Fig.- 3. Fig. 5 shows a bridle` sling with another form of rope protecting sleeve. Fig. 6 is a longitudinal section showing part -of one rope of Fig. 5 and its protecting sleeve. Fig. 7 is a cross section of the same.

Referring now especially to Figs. 1 to 4,

the column or anchor connection sling shown consists of a single wire rope 10 formed or spliced endless so as to consist of a loop formed of double rope with its two holding a load-or the anchorage, as shown in Fig. 2. The eyes 11, 12 are preferably formed vby the thimbles shown, in which the wire rope passes around the grooved thimble pieces or thimbles proper 13, and is held at the inner eye end by a squeezer or clamping ring 14 inclosing the rope and secured by rivets l passing through the inner ends of the thimbles 13 and squeezer 14. The rope may be held in place in the thimbles by ears 2 formed on the thiinbles and bent over the rope, as shown in connection with eye 11, but at the load end the eye preferably has its rope held by a special thimble as shown, in which the thimbles 13 are formed with extended flanges 15 at the outer end of the thimble to which are secured by screws I3 a clamping piece 16 grooved to receive 'the rope.

The double rope 10 is liable to undue wear and cutting by the edges of girders, beams, orsirnilar building material or anchorage with which the hoist is used, and the especial object olf' the present invention is to provide suitable means for avoiding this, so as to realce the wire rope durable and safe, while at 'the same time permitting convenient inspection of all of the rope, so that wear or weakness may be detected at once, and the sling 'then repaired 0r replaced to avoid all danger of accident. This result is secured in the construction shown in Figs. 1 to l by a protecting covering of short separate sleeves 17, these sleeves sliding freely on the rope and being so short as t0 secure the desired flexibility. The sleeves 17 are preferably of different lengths so as to 'stagger the joints on the two parts of the loop, as shown, so that the edge of the material hoisted will not reach the rope between the sleeves. The pressing together of the sleeves onthe inner side of the loop, where the ropes are bent about the load aids in securing the same result. The sleeves 17 will preferably have rounded ends as shown, to reduce as far as possible wear on the rope. Obviously the entire rope may be inspected by moving all or a portion of the cylinders 5,

to one end of the rope in one direction or the other.

In some cases, two parts of the double rope-loop 10 `preferably. will be held together at intervals, so as to prevent the spreading `apart of the two parts, and this result is secured in the construction shown in Figs. 1 to 4 by providing sleeves 17 at suitable intervals with eyes 4 on their inner sides connectedV together by bolts or rivets 5 so as to; form hinges providing for free movement of the two parts sidewise while at the same time holding them against spreading-apart.

Referring nowto the bridle slin shown in Figs. 5 to 7, 18, 19 are the two lo the bridle sling, each formed in the same manner as the sling of Figs. 1 to 4, so far as the formation of the eyes and construction 0f the rope and thimbles are concerned,

the load eyesy in this case, however, being shown as. having the thimble' secured by ears 2 and not by the special thimble shown on eye 12. The eyes at the hoist end are connected by a wire gromet 20 passing through the loop eyes', and the eyes at the opposite 0r load end are formed to receive the hooks 2.1 by which the load ends of the L loops are held about the load, these hooks 21 being carried by wire remets 22 sliding on the loops 18, 19. he gromets 20, 22, are preferably endless wire rope rings such as described and claimed in the Carnagy g Patents No. 654,224 and No. 654,225, dated July 24th, 1900, but rings formed or spliced endless in other ways maybe used.

The gromet 20 at the hoisting end of the sling is preferably armored on the inner side as shown, by a curved steel plate 23, preferably formed in two or more parts as shown, so as t0 permit elongation of the gromet under' load strain, and the rope is held in place on this armor by ears 7 similar to the ears 2 on the rope eyes. The hook gromets 22, are ypreferably formed to-provide two eyes, one for receiving and sliding upon thev rope 18 or 19, and the other for receiving the hook 21, the construction shown for this purpose being as follows The gromets are armored 0n the inner side by steel plates 24 grooved to receive the rope, this armor being divided into two or more parts so as to permitelongation of the gromets under load strain,l and the ktv'vo eyes are formed by clamps; 8 lo n opposite sides of the gromet to receive the ropes, and a clampingring or strap k9 extending about the clamps 8 and preferably secured by being shrunk on around the clamps; It will be understood that in use theylseparated ends of the two loops 18, 19, 0f this bridle sling are brought around the' load for holding the load on the proper lines and the hooks 21 hooked into the eyes, the gromets 22 sliding on the load so as topull taut on the latter.

The rope yprotection shown in Figs. 5 to 7 consists of a wire 25, preferably rectanguops of s lar in cross section, as shown in Fig. 6, Wound hehcall secure the desired flexibllity of the sling. This covering 25 is made in two or more sections, two being shown, so that by moving one or both of the sections in opposite directions the entire rope of the loops 18,

19 may readily be ins ectedil as in the case tection may be held `against spreading, ifl

desired, by any suitable means, as. by the hinge eyes of the sleeves 17 applied to the to form a sleeve inclosing. 'i the rope and oose enough on the rope to wire at intervals, or by. using short sleeves with such hinge eyes between wire sections.-

It will be seen that the invention provides a wire rope sling in which rthe rope is well protected against injury by contact with the load or by .Wear from contact with the rope of the eye of the column or anchor connection sling or the sliding gromet of the bridle sling, or other parts which may be used for holding the sling around the load, while being loose and sliding freely upon the rope, so as to permitpthe ready inspection of all parts Yof the rope. tection, also permits the equalization of the tension upon the two parts of the loop in the double rope sling shown, which is im This loose prol portant, in providing a protected Wire rope sling in which the equalization of' tension on the two parts of the loop enables small rope to be used so as to secure great flexibility with the strength required, the protectionof the rope, of course, being more important as the size of the Wire rope is decreased. While the rope protection of the presentv invention is of especial importance in connection with such 4double Wire rope slings, however, and such constructions form specific features of the invention, this rope protection may be applied, also, to single rope slings, and such constructions are in\ eluded within the broader features of the invention. It will be understood, also, that freely on the rope for protecting the rope from wear and to permit inspection'of the entire length of the loop rope by sliding the sleeve on the rope.

e 2. A sling having a loop formed of wire rope and a flexible protecting sleeve sliding freely on the rope for protecting the rope from wear and formed in sections to permit inspection of the entire length of the loop rope by sliding the sections on the rope.

3. A sling having a loop formed of wire Licence rope and a flexible protecting sleeve for protecting the rope from wear and formed of short cylinders sliding freely on the loop inl hook carrying or receiving member lsliding on the sleeve.

5. A sling having a loop formed of double wire rope with its two parts side by side,l

each part being provided with a flexible pro- -tecting sleeve sliding freely on the rope and formed to permit inspection of the entire Y llength of the loop rope.

6. A sling having a loop formed of an endless Wire rope with eyes at opposite ends of the loop, each of the two parts of the loop being provided with a protecting sleeve sliding freely on the rope and formed to permit inspection of the entire length of the loop rope.

7. A sling having a loop formed of double wire rope with its two parts side by side,

. each part being provided with a iiexible protecting sleeve formed in sections to permit inspection of the entire length of the loop rope by sliding the sections on the rope.

8. A sling having a loop formed of double wire rope with its two parts side by side, each part being provided with a flexible protecting sleeve formed in sections to permit inspection of the entire length of the loop rope by sliding the sections on the rope, and

the sleeves on the two parts being connected i at intervals to hold the parts together.

9. A sling having a loop formed of double w1re rope With its twoparts side by side, each part being provided with a protecting sleeve, said sleeve being formed of short cylinders arranged to break joints on the two parts, and the tw-o parts being connected at intervals by hinged joints between the cylinders to hold the parts together.

l0. A sling having a loop formed of double Wire rope with its two partsside by side, and provided with eyes at each end of the loop, and metal thimbles inside the eyes, the

rope being connected so as to permit slip on the thimble at one or both ends of the loop to equalize the tension on the two parts of the loop, and each part being provided with a flexible protecting sleeve sliding freely on the rope for protecting the rope from wear and formed to permit inspection of the entire length of the loop rope.

11.` A sling having a, loop formed of double wire rope with its two parts side by side, and provided with eyes at each end, and each part being providedgwith a flexible protecting sleeve sliding freely on the rope for pro tecting the rope from wear and formed to permit inspection of the entire length of the loop rope, and a wire rope gromet sliding on the sleeves for carrying or receiving a hook to connect the eye at one end of the loop with the ygromet In testimony whereof, I have hereunto set my hand, in the presence of two subscribing witnesses.

NOBLE C. HARRISON. Witnesses:V HARVEY CooLEY,

SAML. E. WILSON.