Abstract: A retractable lifeline safety device usable as heights above the ground. The safety device is attached to the structure on which the worker is performing the task, and a lifeline such as a cable is withdrawn from the housing thereof, the end of which is attached to a belt or harness worn by the worker. The cable may be easily drawn out of the housing in response to the worker moving about normally in the appropriate work space, and the cable is automatically drawn back into the housing of the safety device as the worker draws closer thereto. However, should the worker fall, a brake mechanism within the safety device is automatically engaged by a sprocket and pawl system, stopping the worker's descent.

Abstract: An expansible anchor is adapted for inserting into a hole formed with a structure. The anchor includes a load cable and a center chock attached to an end of the load cable. At least one side chock resides adjacent to the center chock, and is adapted for movement between an anchor-contracting position and an anchor-expanding position. In the anchor-contracting position, the anchor is readily inserted into and removed from the hole of the structure. In the anchor-expanding position, the anchor is locked inside the hole of the structure. A chock-release column bears against the center chock or may bear against the at least one side chock. The chock release column is in a fixed relation to the center chock via a fastener and has an enlarged head adapted for locating outside of the hole. The enlarged head defines a striking surface adapted for receiving a sudden force.