Lock box

A lock box connected to a lifting device having a plurality of claw-like appendages radially therealong that is suspended on the ends of chains of a chain lift extending from a crane, said lock box is for shortening and lengthening the chains of the chain lift as needed to maintain balance and tension, by locking into place and then unlocking in a cycle during the lifting and releasing process of the claw-like appendages of the lifting device with a large object, wherein said lock box includes:

• a) a casing connected vertically and centrally with the lifting device;
• b) an elongated shaft having an upper end with a shackle hole connected to one of the chains of the chain lift;
• c) means for guiding a lower end of said elongated shaft vertically within said casing, so that the upper end of said elongated shaft will extend out above said casing;
• and
• d) means for locking and unlocking said elongated shaft within said casing, so that when said shaft goes to the bottom of said casing it will be locked therein to create a downward tension on one of the chains of the chain lift to hold the claw-like appendages of the lifting device in a released open position, until said elongated shaft is unlocked at the bottom of said casing to release tension on the chain of the chain lift to allow the claw-like appendages of the lifting device to close around the large object when lifted.