US1589917A - Reenforcing clamp for jointed iron poles - Google Patents

Description

Patented June 22, 1926.

PATENT OFFICE.

HOLLAND G. WILLIAMS, 0]? BRIDGEPOBT, CONNECTICUT.

REENFORCING CLAMP FOR JOIN'IED IRON POLES.

Application filed January This invention relates to rcenforcing clamps for iron poics, the latter being formed of sections ot decreasing diameters from bottom to top.

Iron poles or an approved form are formed 01 hollow sections, each successive section having a diameter less tl an that of the sec tion immediately preceding.

The pole is constructed by shrinking these sections within each other, and the resultant circumferential and substantially horizontal ledge at each joint has been covered with a cement that is suppose-ii to protect the joints against erosion.

But it has transpired that, while this cement is usually effective, there are certain localities where it is disintegrated by the chemical action of the elements, the result being the destruction of the pole joints, thereby causing great expense for replacement.

The object of this invention is to so repair a pole, injured as above noted, that its strength and utility will be fully preserved, at an expense that is a mere trifle as compared with the cost of a new pole and its mounting.

In the accompanying drawing Figure 1 is a side elevation showing scclion oi a pole with my improvement applied thereto,

Figure 2 is a cross section taken at the line 22 01": Figure 1, and

liigure 3 is an illustration similar to Figure 1 from another viewpoint, one of the clamp members being shown in section.

1, 2, denote pole sections, the smaller secion 1 being shrunk within the larger sec- ;ion 2, and leaving a circumferential ledge 3 at the joint, as shown at Figure 4t, 5, are the members of the improved clamp, each member having two diameters, one for the pole 1 and the other for the pole 2.

lVhere the different sized parts of each member adjoin, a jog 6 is "formed, which, when the members are in position around the pole sections, rests upon and closely conforms to the ledge 3.

The members 4-, 5, are formed with verti- A PF cal side ribs 7, 8, that are intersected by horizontally disposed ribs 9, 10, so that it will be clear that the members are well reenforced.

At the ends or" the ribs 9, 10, are diverging portions 11, 12, within which are formed recesses 13, 1%, and flanges 15, 16, and 17, 18, extend from the ends or the clamping members and form side walls of the recess. The members are secured in position by bolts 19 driven through the flanges and drawn tight by the usual nuts 20, the inner faces of these members being curved throughout their lengths to closely contact the pole sections, while the weight of the upper pole section, which might cause it to telescope within the lower section, is sustained not only by the clamping members but by the ledge 3, or, in other words, by the upper end of the lower pole section, and in this connection attention is called to the tact that the bolt heads and nuts are housed within the recesses so as not to present unsightly projections.

The flanges themselves contribute to the strength of the clamping members, and when the latter are clamped firmly ound a pole at the joint, the pole sections will be inclividually held and the pole itself will be better than new since erosion can never take place at the clamped joint.

What is claimed is A repair clamp for iron poles formed of sections of ditl'erent diameters with a resultant circumterential ledge formed at the junction of said sections, comprising two elongated clamping members curved to conform closely throughout their length to the pole and having two diameters corresponding to those of said sections whereby ashoulder is formed which rests upon said ledge, said members having vertical and horizontal ribs and provided with flanges at their ends, and bolts and nuts for drawing these flanges together and clamping the members to the pole.

In testimony whereof I affix my signature hereto.

ROLLAND G. WILLIAMS.

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