US1756376A - Method of making weldless elevator links - Google Patents

Description

April 29, 1930. 5., w, MOORE 1,756,376

METHOD OF MAKING WE LDLESS ELEVATOR LINKS Filed Nov. 18, 1927 .271 VE/V 7' 0R GEORGE M fiomz.

Patented Apr. 29 1930' UNITED STATESPATENT OFFICE GEORGE "W. MOORE, OF LONG BEACH, CALIFORNIA, ASSIGNOR Tb R. E. MOORE, OF

PIEDMONT, CALIFORNIA METHOD or MAKING ,wELnLEss ELEVATOR LINKS App1ication filed November 18,

An object of my invention is to provide a novel method of forming'weldless elevator. links whereby a link is provided which will not readily break under severe strain, and

5 which is less expensive to manufacture. Another object of my invention is to provide a weldless link which is formed with a very few operations, such operations bjeing simple and quickly performed.

Other objects, advantagea'and features of invention may appear in the accompanying drawings, the-subjoined detailed descr1p-:

- :hood of a fracture occurring tions, and the appended claims. In the drawing-- Fig.1, is a side elevation of the bar from which the link is made.

Fig. 2, is a side elevation the next stage of manufacture.

Fig. 3, is a side elevation of the the third step of completion.

Fig. 4, is a planview of the completed'bar. Fig. 5, is a side elevation of the same; Fig. 6, is a side elevation of my links in position on an elevator.

Referring more particularly to the-drawing, my weldless link is formed in a series of steps starting with a bar 1, of substantially uniform diameter through its length.

This bar being then moved through the rollers formingthe structure as shown. in Fig.

2, consists of a central circular cross section 2, the ends 3, 4, being of substantially the same diameter as he bar 1, with which I start. During this rolling operation, the

bar is elongated to the required length, which length varies from 6 feet to 8 feet, more or less. The rolling operation is so controlled that each bar is made exactly the same length;

this insures a uniform strain on the two links which support the elevator.

The next step consists in flattening the ends 3, 4, as shown at 5, 6. The central section 2 remains undisturbed. The next operation consists in cutting the openings 7 8, to form the eyes 9, 10. The opening 7 which extends over the elevator lugs is smaller in size than the opening 8, which is engaged by the block hook, that is the openin 7 is smaller in dimension along the longitudinal axis of the link than the opening 8.

'ofthe bar form cross sectional Serial No. 234,228.

The upper end of the eye 10, is flattened as at 11, and is bent'upwardly at an angle. The purpose of-the. flattening is to provide more metal along the line-of greatest strain, and

the' bending is' to enable the twolinks to fit more closely-together, when in use on an elevatoras shown inFig. 65'

The central section 2, tapers radually outwardly into the eyes 9, 10, so t at no abrupt angles are formed, across which a break can occur. -The gradual tapering .distributes the strain more equally and there is less likeliat the point where the eyes andthe central section come to ether.

it is obvious that the above described method can be accomplished by forging the bar into shape'as well as by rolling the same,

and also it may be desirable to make the end 3, slightly smaller in diameter than the end 4, by'reason of the smaller than the eye 10.

When the links are in actual use, one of the operators stands a considerable distance above the floor of the derrick on a specially provided platform, and as the elevator passes him, hereaches. out and grasps the links to pull the pipe over into the rack. To provide a convenient hand grasp, a pair of loops 12,

12, are secured at either'end of the link by either welding or other suitable processes,

fact that the eye 9, is

and a cable is then secured in the loops and extends between them thus forming a hand grasp for the operator.

In the rolling operation, and in the cutting of the eyes 9,10, it is desirable that the cross sectional area of the central section 2, be about the same as the sum of the cross sectionalarea of both sides of the loop, thus making all parts of thelink substantially the a same in tensile strain.

Having described my invention, I claim:

1. A method of forming a weldless elevator link which consists in rolling {that of unidiameter into a section of reduced central diameter, both ends remaining the same dimension in cross sectionas the original bar, then flattening the ends and then cutting apertures in both ends to form eyes.

2. A method of forming a weldless elem-- tor link which consists in rolling a bar of uniform cross sectional diameter into a section of reduced central diameter, both ends remaining the'same dimension in cross section as the original rod, then flattening the ends and then cutting apertures in both ends to form eyes, the aperture in one eye being of greater longitudinal dimension than the opening in the other eye, then flattening the outer end of the longer eye and bending the flattened portion u wardly,at an angle.

3. A method of orming a weldless elevator link which consists in cutting a bar into 5 lengths less than the final length of the link,-

then rolling the bar to form a lesser diameter,

centralsection, said rolling extending the bar to the length of the completed link, the ends being the same diameter as the original bar, then flattening the ends and then cutting apertures in the'fiattened ends to form eyes.

- 4. A method of forming a weldless elevator linkwhich'consists in cutting a bar into lengths less than the final length of the link,

then rolling the bar to form a lesser diameter central section, said rolling extending the bar to the length of the completed link, the ends being the same diameter as the original bar, then flattening the ends and' then cutting apertures in the flattened ends to form eyes, the eye sections tapering gradually into the central section and one eye being'of greater longitudinal dimension than the other.

In testimony whereof, I aflix my signature.

GEORGE W. MOORE.

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