US179207A - Improvement in stirrups for oil-wells - Google Patents

Description

W. J. LEWIS.

STIR-RUPS FOR O-IL WELLS.

Patented June 27. 1876.

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UNITED STATES PATENT FFIGE.

WILLIAM J. LEWIS, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN STIRRUPS FOR OIL-WELLS.

Specification forming part of Letters Patent No. 179,207, dated J une 27, 1876; application filed June 10, 1876.

To all whom it may concern:

Be it known that I, WILLIAM J. LEWIS, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Stirrup for Oil- Wells and similar Machinery; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming part of this specification, in which Figure 1 is a perspective view of a stirrup. Fig. 2 is a transverse section on the line y 3 Fig. l; and Fig. 3 is a perspective view of a bar employed in making said stirrup.

Like letters refer to like parts wherever they occur.

My invention relates to stirrups used on walking-beams of oil-well and similar machincry; and consists in forming theside straps of ch annel-iron, or bar-iron has-'inglongitudinal ribs, which strengthen the stirrup, prevent the turning of the bolts when the nuts are screwed up, and give great strength and lightness in proportion to the contained metal.

I will now proceed to describe my invention with reference to the drawing, so that others skilled in the art to which it appertains may make and use the same.

The dotted line represents the end of the walking-beam upon which the'stirrup hangs. A is the stirrup, composed of the two side pieces-ct a and the cross-piece b. The side pieces a have two or more longitudinal ribs, a a forming a'depression or channel, a through which holes are punched for the passage of the bolts that secure the stirrup to the suckerrod, temper-screw, or drill-tool B. The heads 0 of the bolts rest within the channel a and are prevented from turning by ribs a In constructing stirrups of the form specified, I first roll, forge, or otherwise produce a channel-bar or ribbed bar, similarto that shown in Fig. 3, having a depressed center and reenforced edges. This bar is cut into suitable lengths, the bolt-holes punched, the blank bent to form shoulder 01 of the stirrup, and cross-piece b is welded to the two side pieces a, a. If it is desired to give the finished appearance to the side straps, as shown at e, the same can be done by notchiug the channelbar, as indicated by dotted line, Fig. 3, and then bending and welding in the well-known manner.

The advantages obtained by constructing a stirrup as specified are, that a stirrup lighter than, but of equal strength with, those now in use can he made from a less material, or a stirru p of greater strength from an equal amount of metal. The bolt-holes being punchedin the depression or channel, the strength of the stirrup at those points is not impaired, as the ribs act as re-euforces. The ribs also re-enforce the stirrup at the bends or shoulders 01, where the stirrup is liable to break when in use from change of structure incident to the constant jar; and, finally, the ribs or channel prevent the turning of the bolt when securing or tightening the nuts.

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

The stirrup herein described, having the channeled or ribbed side pieces, substantially as and for the purpose specified.

In testimony whereof I, the said VILLIAM J. LEWIS, have hereunto set my hand.

WILLIAM J. LEWIS.

Witnesses:

F. W. BITTER, Jr., JAMES I. KAY.

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