| 摘要 |
<p>A rotating display for advertising purposes uses flaps coupled to a common axis. The display flaps (21) are pinned to discs (23,24) on a common shaft (26). The shaft is rotated by a drive (30) with signals derived from a cam actuated sensor (312) used to command the control unit (11). The shaft also has a disc (313) with indent holes (317) to provide retention in a given position. The selector unit (31) in association with the control module determines the rate at which flaps are displayed in the window of a housing cabinet.</p> |
