Installation for repelling birds

Installation for repelling birds comprising, in combination,

• a unilinear drive assembly incorporating
• a stretched drive guy rope provided at each end with
• a swivel joint;
• a driven rotating element and
• at least one driving pulley, the former and the latter being firmly secured to said stretched drive guy rope;
• at least one driven pulley, opposed to said at least one driving pulley and having a center line situated in a plan passing through the midsection of the latter;
• at least one endless cable, tensioned between said at least one driving pulley and said at least one driven pulley, said at least one endless cable having an upper path and a lower path;
• a pair of stretched guide ropes, essentially parallel to said at least one endless cable, each one of said pair of stretched guide ropes being in general perpendicularly disposed to said stretched drive guy rope and extending from the ends of the latter;
• at least one carrying line, perpendicularly disposed with respect to said pair of stretched guide ropes and attached to said at least one endless cable;
• and
• an actuating assembly including
• a reversible electric motor transmitting via
• a reduction gear drive, provided with
• an output drive shaft, on which
• a drive wheel is securely fastened, and via
• a mechanical transmission, a torsional moment from said drive wheel to said driven wheel;
• and
• a triggering element for changing direction of said reversible motor, said triggering element being attached to said at least one endless cable initiates a change of direction of said reversible motor when it reaches a position close to said one driving pulley.