Retaining and braking apparatus for use with powered rotational force applicator tool

A powered tool for applying rotational force to a turnbuckle comprising:

• a power drive means;
• a tool head mounted to said power drive means, said tool head having a first slot formed therein adapted to permit passage of said turnbuckle therethrough;
• a force application disc mounted in said tool head for applying rotational force to said turnbuckle, said disc having a second slot formed therein adapted to receive said turnbuckle, said second slot being formed in the perimeter of said disc and extending radially past the center of said disc, said disc being mounted for rotational movement in said tool head;
• power transmission means associated with said power drive means and said tool head for transmitting power from said power drive means to said disc so as to tend to rotate said disc;
• retaining and braking means mounted on said tool head for selective movement between a first position adjacent said first slot and a second position spaced from said first slot, said retaining and braking means when in said first position cooperating with said tool head to prevent passage of said turnbuckle through said first slot and when in said second position cooperating with said power transmission means to oppose rotation of said disc.