Abstract: A clamp consists of a clamp bolt cooperating with an arcuate saddle which together encircle an article to be clamped, the clamp bolt constituting tightening means for tightening the clamp on the article. The saddle terminates in two tubular portions which receive the bolt and provide respective bearing surfaces for the head and the clamping nut, or the two clamping nuts, depending on the nature of the bolt. The saddle is formed by stamping from a rectangular blank of thin flat sheet metal, the blank being formed into a hollow tube with the longer edges in contact with one another and bent to the necessary arcuate shape, the joint between the longer edges being disposed in the radially inner concave face so that it contacts the article to be clamped.

Abstract: A corner construction comprises a pair of extruded frame elements with mitered ends connected at a joint plane. The frame elements include an H section part comprising web and parallel flange portions and the web of the H section part of one element is pressed to be sheared from its flanges and extend across the joint plane and engage snugly between the flanges of the other section to align the corner and make it rigid.