Selective positioning means for curtain assembly

Claim 1

In a curtain assembly for an opening, a one-piece flexible curtain element convolutely wound about a spring-biased shaft which is rotatably mounted adjacent one wall surface of the opening, a rigid bar associated with the free end of the curtain element, and means associated with the rigid bar for overcoming the spring-biased shaft of the curtain element in order to selectively position the free end of the curtain element at desired locations said means including hook-shaped guide means which cooperatively engages a complementary-shaped track member extending substantially normal to the spring-biased shaft of the curtain element, said hook-shaped guide means including means for developing oppositely reacting and adjustable force coupled relative to the track member in order to provide predetermined binding engagement of the hook-shaped guide means relative to corresponding sections of said complementary shaped track member for the clutching action that is desired, said means for developing oppositely reacting and adjustable force couples including means for longitudinally adjusting said hook-shaped guide means relative to said rigid bar in a direction substantially normal to said complementary shaped track member and means for adjusting said hook-shaped guide means about the end of said rigid bar in an arcuate path which is also substantially normal to said complementary shaped track member (the desired friction clutching action of the curtain element and its guide means relative to the track member).