Wide-area infrared signal emitter for target presentation - comprises rotary heated radiator with thermal image alterable from circle to star by redn. of speed

摘要

A rotary electric motor (2) at the top of a column (1) drives (2.1) the coupling (3.1) of a propeller with a counter wt. (4). The spring steel wire core (9) of the propeller is heated by a winding (10) within a shrunk sleeve (11), supplied with current through a slip ring (6) and contact (7). - The rotation produces, according to speed, a fully circular thermal image or an animated star-shaped image, with an annular gap due to a sliding sleeve (12).