Patent ID: 7699090

Claim:
A disengageable master carrier assembly for a motor driven drapery, comprising: a master carrier block section and a locking block section; the locking block section having a detent pocket sized to receive an engagement member mounted to the master carrier block section; the master carrier assembly having: a support arm for supporting a leading edge of drapery fabric, the support arm being supported by a first resilient member, the amount of resilient support for the support arm provided by the resilient member being changeable to adapt to drapery fabrics of different weights, such that the support arm will support a generally forward portion of drapery fabric and be held in an engaged operating position by the resilient support member when no manual force is applied to the leading edge of the fabric and will be displaced to a disengaged position when a manual force is applied to the leading edge of the fabric; an engagement member sized for fitting into the detent pocket of the locking block section, the engagement member being resiliently urged by a second resilient member disposed between a movable portion of the support arm and a part of said engagement member; the second resilient member having a resilience such that: the engagement member will be urged into its engaged position in the detent pocket of the locking block section, when the engagement member is aligned with the detent pocket and when the support arm is in its engaged position, displacement of the support arm to its disengaged position will cause the second resilient member to be sufficiently displaced to move the engagement member out of the detent pocket of the locking block section, to permit disengagement of locking block section from the master carrier block section, and with the support arm in its engaged position, direct force applied to the engagement member by the locking block section as the engagement member is moved onto the locking block section during a re-engagement process being sufficient to move the engagement member toward a disengaged position, against the urging force applied by the second resilient member, the resilience of the second resilient member being sufficient to re-engage the engagement member with the detent pocket when the engagement member is realigned with the detent pocket; and wherein the support arm is a first support arm and the master carrier block section further comprises a second support arm fixedly mounted to the master carrier block section for supporting at least a portion of the weight of a generally forward portion of the drapery fabric.