Anti-two block device

A device for preventing two blocking in a crane assembly having a boom with inner and outer ends, an upper load block attachment to said outer and, a cable extending vertically from the upper load block, a lower load block suspended by the cable and means for moving the lower load block relative the upper load block, said device comprising:

• a cable follower between the upper load block and having a switch actuator for controlling movement of components on the crane assembly;
• and
• a flexible rod having a lower and upper end, said lower end being attached to said cable follower and said upper end being a free end spaced from and unattached to said switch actuator when the lower load block is not in contact with said cable follower, and engageable with said switch actuator when said follower is in contact with the lower load block, said switch being adapted to control the means for moving the lower load block relative the upper load block so that engagement of the switch actuator by said rod ceases all movements of the lower block towards the upper load block.