Screen for display of brochures or projected pictures has rod raised and lowered on rail hung on wires running over rollers and connected to motor drive

摘要

There is a carrier device (20) with a grating (24) and guide rollers (40) underneath it, running on parallel axes (41). A drive motor (11) at the end of the assembly turns a shaft (12) with bevel gears driving a set of wire (30) winding drums (14). The wires raise and lower a beam which may be attached to the projection screen.