US1537197A - Joint or coupling for posts - Google Patents

Description

May 12, 1925. 1,537,197

' O. SCHUBERT JOINT OR COUPLING FOR POSTS Filed Jan. 15 1925 lhucnfir.

AJTGYRCH.

latented May 12, 1925.

UNITED STATES PATENT orrics.

OSKAR SCHUBERT, 0E FBEIBURG, GERMANY, ASSIGNOR TO GEBR. HIMIVIELSBACH AK'IIENGESELLSCHAFT, OF FREIBU'RG, GERMANY.

JOINT OR COUPLING FOR POSTS.

Application filed January 13, 1925. Serial No. 2,240.

To all w/zom it may concern.

Be it known that I, OsKAn SoHUBnn'r, residing at Freiburg, Baden, Germany, a citizen of the German-Republic, have invented certain new and useful Improvements in Joints or Couplings for Posts, of which the following is a specification.

The object of my invention is to provide improved means for connecting poles or.

lengths of timber for making composite posts. For. this purpose substantial strength and rigidity are required, and it has been proposed to use corrugated metal coupling plates, screwed to the timber, and in some cases plates which are intended to touch the timber only at their ed,-? es,,so that there is a cavity between the metal and the timber. This cavity is in some respects use ful, and I aim at retaining the same, with my invention, but heretofore it has been found that by screwingup the plate the same is distorted and bent, so that more or less close contact occurs, where the cavity was desired. r

According; to my invention a curved metal plate is folded along two, parallel edges which are parallel with the axis of curvature, the parts folded over forming heads, at the bends, and then lying in part against the inside or concave face of the plate, their inner edges, however. being; bent away from the face of the plate to form flanges, whose depth is substantially equal to the depth of the beads. The radius of the plate curvaturesomewhat larger than the. radius of the post. I make holes for screws in the double thickness of the plate, where it has been folded.

The plate'being placed against the post, touches the same only with the beads and the flanges, if the portion between the flanges is left in the form of a segment of a cylinder, but I may'bend this part inwards, to form a channel or channels, so that a portion or portions thereof will abutagainst the post.

The screw inserted through the holes in the double thickness-of metal between the beads and flanges can be screwed in very tightly without substantially distorting the plate, because the beads and the flanges form strong and rigid abutments for taking the thrust. There is practically no risk of so distorting any part of the plate that it will make contact with the post, except with the beads and the edges of the fiancee, and with such other part as may have previously been bent inwards for the purpose of making contact. v 7

Two constructions according to the inven-' tion are shown in the accompanying: drawmg, in Figs. 1 and 2 and in Figs. 3 and 4 respectively. i

Fig. 1 is an elevation of a coupling plate, partly broken away, looking to 'ards the concave face thereof, and i Fig. 2 is a cross section of this plate. applied to a post.

Figs. 3 and 41 are similar views of the second construction.

Referring first to Figs. 1 and 2. a is the cylindrically curved part of the plate. I). 7) are the beads, c the flanges, and (Z. (Z holes for the insertion of screws, as shown at c in Fig. 2, f being the post.

In the construction shown in Figs. 3 and 4. the folding at the lateral edges is precisely similar to that shown in Figs. 1 and 2,

but the part it between the flanires has two sharp inward bends, as at 70, to form a channelled part g which abuts against the post I may provide holes for screws in the part 9.

lVhatl claim as my invention and desire 1. A metal coupling plate for the purpose set forth, curved and folded along two parallel edges parallel with the axis of curvature, the folded portions forming); heads at the bends and lying in part against the concave face of the plate, and the inner edges of said folded parts being bent away fromsaid concave face to form flanges.

2. A plate as claimed in claim 1. having holes for screws in the double thickness of metal formed by the folding thereof.

3. A plate as claimed in claim 1, having a portion thereof bent to form a ridge between the flanges.

In wltness whereofI have signed specification.

OSKAR SCHUBERT.

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