Mast leg pulley

A drill rig, comprising:

• a back leg of a mast section pivotally connected to a pivot support at a pivot connector;
• a front leg of the mast section pivotally connected to a leg support;
• the leg support having a first support end with a surface connector to attach to a rig surface and a second support end with a leg connector to connect to the front leg to form a joint;
• a cable with a first cable end attached to the leg support;
• and
• a first pulley connected to the back leg, the first pulley positioned to angle a first portion of the cable with respect to another portion of the cable;
• wherein the back leg rotates about the pivot connector when the mast is raised to an upright position.

A drill rig, comprising:

• a back leg of a mast section pivotally connected to a pivot support;
• a front leg of the mast section pivotally connected to a leg support;
• the leg support having a first support end with a skid connector to attach to a mast transport skid and a second support end with a leg connector to connect to the front leg;
• a cable with a first cable end attached to the leg support;
• a first pulley connected to the back leg, the first pulley positioned to angle a first portion of the cable with respect to another portion of the cable;
• a second pulley is connected to the mast section, the first pulley being positioned at a higher elevation than the second pulley when the mast section is in an upright position;
• and
• a third pulley connected to the mast section that is positioned to direct the first cable end in an upward direction when the mast section is being lowered;
• wherein a distance between a fixed end of the cable and the first pulley increases as the mast section is lowered;
• wherein a force is exerted on the leg support through the cable that causes the leg support to rotate about the second support end into a transport position as the mast section is lowered;
• wherein the distance between the fixed end of the cable and the first pulley decreases as the mast section is raised wherein the decreased distance passively releases the force allowing the leg support to rotate downward;
• and
• wherein passively releasing the force allows the leg support to move into an operational position where the first support end aligns with a support connector incorporated into the mast transport skid.