Mechanical rotating animal scarer - has jet rotor periodically set in motion and to which alarm devices are attached

摘要

The animal scarer comprises a jet rotor (2) mounted on a support and periodically set in motion by a medium supplied to it. Alarm devices (24-28) frightening the animals are mounted on the rotor and move with it. Movement can be effected by gas, water or electricity, and the optical effects can be initiated or accompanied by acoustic signals of a frequency between 15 and 21 KHz. Galton whistles (29) can be used as sound generators, or the signals can be electrically generated.