Patent ID: 7525267

Claim:
A motorized operator for moving a door between first and second positions, comprising: a control unit including a movable member drivenly connected to a motor for movement in timed relation relative to the position of the door, the control unit operable to interrupt power to the motor when the door reaches the first and second positions, respectively; a control circuit associated with the control unit including an optical switch responsive to the position of the movable member to provide a signal to the control circuit for controlling operation of the motor to arrest movement of the door at one of the first and second positions, the movable member including a rotatable screw which is rotatable in response to movement of the door and a nut member movable along said screw, an optical shield member disposed on the nut member and operable to move along said screw to effect operation of the optical switch, the optical switch including a support member and an emitter and a sensor mounted spaced apart on the support member and disposed to allow movement of the optical shield member therebetween.