Abstract: A resilient inspection brush used in electrically inspecting pipelines for abnormalities is described which employs highly conductive metals, such as nickel. Since bristles [330] made from these metals cannot be secured firmly by soldering or epoxy, they are folded over a retaining member [350], or wrapped around the retaining member [350]. The retaining member [350] is secured inside of a base housing [320]. The top [321] portion of the base housing [320] may be crimped or swedged to reduce the size of the opening, thereby physically holding the bristles [330]. This also insures that the retaining member [350] does not pass through the opening, securing the retaining member [350] inside of the base housing [320]. In another embodiment, an inner sleeve [810] is used to further secure the bristles [330] and simplify assembly.

Abstract: A resilient inspection brush used in electrically inspecting pipelines for abnormalities is described which employs highly conductive metals, such as nickel. Since bristles [330] made from these metals cannot be secured firmly by soldering or epoxy, they are folded over a retaining member [350], or wrapped around the retaining member [350]. The retaining member [350]is secured inside of a base housing [320]. The top [321] portion of the base housing [320] may be crimped or swedged to reduce the size of the opening, thereby physically holding the bristles [330]. This also insures that the retaining member [350] does not pass through the opening, securing the retaining member [350] inside of the base housing [320]. In another embodiment, an inner sleeve [810] is used to further secure the bristles [330] and simplify assembly.