Locking security frame

A locking security frame comprising four frame sides defining an open center which will receive a four sided article to be secured against theft, each side frame including two parts which are adjustable lengthwise of each other to fit the size of the article, said parts being of channeled cross section with the opening facing inwardly of the frame, the two channel parts at one side frame being disposed to enclose and prevent access to the means used to attach the article to a fixed body, the two channel parts at each of the other three side frames having a sliding fit within each other so that they telescope relative to each other, and releasible securing means for retaining the two parts of each of said three side frames in a fixed lengthwise position, said channelled parts of said other three side frames serving to enclose said releasible securing means and thereby preventing access to said securing means to prevent their release.