US1560874A - Tank scaffold - Google Patents

Description

Patented Nov. 10, 1925.

Urrea J AY ALBERT STOUGH,

OF TEILSA, OKLAHOMA.

TANK SCAFFOLD.

Application led October 6, 1924. Serial No. 741,920.

To all whom t may concern:

Be it known that I, JAY ALBERT Scioperi, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of klahoma, have invented certain new and useful Improvements in Tank Scaffolds; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This Ainvention relates to tank scaffolds and it is particularly applicable for use in the erection of oil tanks of large capacity such as are used as storage tanks in the oil fields and the invention consists in certain novel parts and combinations of parts, 'all of which will be specifically described hereinafter, reference being had to the accompanyinfy drawings, in whichw Fig. 1 is a side elevational view of a portion of a tank to which my invention is applied.

Fig. 2 is a sectional view through the tank showing the end of the scaffold, and

Fig. 3 is a fragmentary top view showing the scaffold applied.

A tank is made up of a plurality of rings, each ring being a segment of a circle. The segments are fastened together, end to end to form the ring and the lower edges of the segments of one ring are fastened to the upper edges of the segments of the next lower ring as will be well understood. The rings are fastened by rivets and the joints between the rings are calked so I have provided a scaffold whereby operators may work from both sides of the tank, that is from the inside and outside and the construction of the scaffold will now be described.

1 is a top rail illustrated as an angle iron and connected to the pairs of end bars by suitable brackets 2 and The brackets support the vertical end bars 4, 5, 6 and 7, the bars 4 and 5 constituting one pair and the bars 6 and 'l constituting the other pair.

Suspended from the brackets by the hangers 8 and 9 are sheaves 10 and 11 which are adapted to ride on the upper edges of the plates 12 of the tank structure. The lengths of the end bars 4, 5, 6 and 7 are greater than the widths of the plates 12 so that they eX- tend below the lower ends of the plates and support outstanding platforms 13 and 14,

braced to the bars 4,l 5, 6: and 'l' by angle brackets 15 and 16.

The platforms 13 and 14 support the operators so it will be apparent that the operators can work from opposite sides of the wall of the tank and that the scaffold may be moved along the upper edge of the tank as work progresses. The length of the bar 1 which governs the length of the scaffold may vary but ordinarily it will be equal to about one-fourth to one-half the circumference of thetank, the length however is immaterial.

As the tank upon which the scaffold is employed is circulary in cross section, it is necessary, in order to provide a substantial mounting for the supporting pulleys and to prevent grinding of the pulleys on the rim of the tank, that the pulley axes extend radially of the tank. I therefore set the brack ets 2 and 3 on such radial lines that when the angle iron end bars are applied to the brackets, the free flanges of thebars will be perpendicular tov a radius running there through. Consequently the 'apertures in the arms of hangers 8 are likewise radial as are the axes of the sheaves 10. The angle brackets 15 and 16 being attached to the angle iron and bars, are also radial, thereby providing proper balance throughout the structure.

It will be apparent that the scaffold can be readily slipped over the edge of the tank and thatit will adequately support the operators in the erection of the tank.

vWhat I claim and desire to secure by Letters-Patent is A scaffold adapted to be supported on a tank of circular cross section, comprising paired end bars for straddling the wall of the tank, a radial bracket connecting the bars of each pair, a top rail connecting the brackets, a hanger in each pair of end bars, grooved wheels carried in said hangers on radial axes and adapted for movably supporting the scaffold from the rim of the tank, radial platform brackets on Vthe end bars, and platforms carried by the platform brackets.

In testimony whereof I affix my signature.

JAY ALBERT sToUeH.

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