Abstract: A method for testing a treated metal substrate toward its propensity to receive and adherently retain a finish coat such as paint or the like; the test is made before the finish coat is applied by applying a strip of adhesive to a specimen treated substrate, stripping the tape, and then comparing the amount of "soil" pick-up versus an established standard; "soil" includes any of the treating material picked up by the tape from the treated substrate.

Abstract: An expansion stud for use in a blind bore hole or the like formed in a concrete anchorage or like support, wherein an expansion sleeve is caused to expand radially in perpendicular relation to the longitudinal axis of the expansion stud and to the bore hole wall. The stud is provided at its inner end with a conically tapered wedge tip formation whose smaller end is integral with the main body of the stud. The expansion sleeve is provided with an internal conically tapered bore which corresponds to the conical taper of the wedge tip, such that axial outward movement of the stud relative to the expansion sleeve causes radial expansion thereof perpendicular to the stud axis and the bore hole wall.

Abstract: A hollow, flexible, two-sided, substantially C-shaped open ring which, when deflated, can readily be distorted for easy application in surrounding relation with respect to a length of dredge pipe, including strap means for temporarily securing the ring in place, and which when subsequently inflated, assumes a substantially circular cross-sectional shape and constricts radially to securely embrace the peripheral wall of the pipe for use in the flotation thereof.