Expanding anchor fixture

Abstract From the Canadian patent

An expanding fixture for securing an element in a bore in a wall or ceiling, has a hollow socket part to be driven into the bore into which, socket an expanding piece composed of flat material is inserted and adapted to widen and press said socket against the wall of the bore. The expanding piece has a transverse part with ends that project beyond the socket through longitudinal slots therein and supported on the edge of the bore to expand, the socket as the parts are relatively moved longitudinally upon insertion of the element in the bore.