Portable safety anchor

A portable safety anchor for use in an aperture in a wall, said wall having first and second sides and said aperture having a header jamb and side jambs,

• said anchor comprising a horizontal bar having first and second ends and having a length adapted to be longer than the distance between the side jambs, said bar having a first clamp connected by a first resilient biasing means to the first end and a second clamp connected by a second resilient biasing means at the second end, said first and second clamps being of opposite hand and movable along the bar, each of said clamps being T-shaped with a first block forming a stem and a second block forming a cross arm, said first block having a face adapted for contact with the first side of the wall, said second block having a toe adapted for contact with the side jamb and a heel adapted to extend beyond the side jamb on the first side of the wall, said heel having an aperture through which the bar passes,
• a means for securing the clamps on the bar with the toe of the second block of each clamp in frictional contact with the side jamb and the face of the first block in frictional contact with the first side of the wall and
• a means for attaching a safety line to the toe of the first or second clamp or to the toes of both clamps, whereby a force applied to the safety line on the second side of the wall is adapted to be transferred to the first side of the wall by the first or second clamp or by both clamps.