Hoisting apparatus, particularly for a cooling tower

A hoisting apparatus mounted on a cooling tower including a mast;

• a cable net framing supported by the mast;
• and a non-self-supporting casing attached to the framing;
• comprising in combination:
• a. an upper and a lower track of circular, horizontal course;
• said tracks being vertically spaced from one another and extending along said casing substantially concentrically with respect to said mast;
• b. an upper traveling block movably mounted on said upper track and a lower traveling block movably mounted on said lower track;
• c. two horizontally spaced, parallel guide cables attached to and linearly tensioned between said upper and lower traveling blocks;
• d. a hoisting cage situated between said upper and lower traveling blocks;
• e. hoisting means secured to at least one of said traveling blocks and said hoisting cage for raising and lowering said hoisting cage between said traveling blocks;
• f. an adjusting means connecting each guide cable to said hoisting cage for horizontally displacing said hoisting cage with respect to said guide cables in a direction substantially perpendicular to said casing;
• g. a guide sleeve surrounding each said guide cable and being longitudinally slidable thereon;
• h. coupling means pivotally attaching said adjusting means to the associated guide sleeve for providing for a pivotal movement of said adjusting means about a horizontal axis perpendicular to the two parallel guide cables;
• and
• i. propelling means for moving said upper and lower traveling blocks on and along the respective upper and lower tracks.