Patent ID: 7128126

Claim:
A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate reversible rotation of said first motion transfer element into reversible rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; and wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to drivingly rotate in said first direction, and said pull force applied in a second pull direction imparted on said single operating element causes said head roller to drivingly rotate in said second direction.