Reduced Motor Drive Shaft For Retractable Curtain Assembly

A curtain assembly, comprising:

• a curtain moveable about an opening in a structure, wherein the opening is defined by sides;
• a pair of supports brackets;
• a curtain deployable about the opening in a direction of travel, said curtain having lateral side edges;
• a locking member arranged at each lateral side edge of the curtain transverse to the direction of travel;
• a respective guide at each side of the opening for receiving a corresponding side edge of the curtain, each respective guide having a narrower portion that allows the curtain to pass therethrough but restricts the lateral side edge portions of the curtain from disengaging from the guides;
• a roller barrel assembly positioned between the support brackets, said roller barrel assembly having a first diameter and configured as a take up roller that stores the curtain in an un-deployed or partially deployed condition, said roller barrel assembly having regions of a second diameter, less than the first diameter, in alignment with the locking members to provide a volume of space for the lateral side edge portions of the curtain having the locking member when the curtain is in the un-deployed or partially deployed condition.