Electrical plug locking device

A locking device for use with an electrical plug having a pair of spaced, parallel tines each of which has an aperture located at a selected end and wherein the apertures are positioned in spaced axial alignment with each other and the locking device includes a housing having an opening which is adapted to receive and pass the ends of the tines, a releasable locking member located within the housing and adjacent to the opening and which includes an elongated member having a circumferentially extending continuous slot formed around the periphery thereof at a selected location and which has a geometrical dimension which is smaller than the geometrical dimension of the outer surface of the elongated member and wherein the elongated member is slideably mounted within the housing for linear movement relative to the ends of the tines between a first position where the slot is remote from the apertures in the tines and a second position where the slot is located between the ends of the tines containing the apertures and substantially in alignment with the apertures and a pair of spherical members each having a diameter which is substantially equal to the distance between the outer surface of the elongated member and the tines and wherein the spherical members are positioned and develop a locking force between the outer surface of the elongated member and the apertures to urge the spherical members into the apertures locking the tines in the opening when the elongated member is in the first position and wherein the spherical members are moved away from the apertures when the elongated member is in the second position enabling the tines to be free of the locking force enabling the tines to be removed from the housing opening is shown.