Patent ID: 8732905

Claim:
A closing apparatus for a wing, comprising: a closer housing adapted to be mounted to a wing or structure adjacent to a wing and having a first end and a second end with a longitudinal axis extending therebetween; a piston disposed in the closer housing for reciprocal movement along the longitudinal axis; a compression spring disposed in the closer housing and having a first end abutting the piston and a second end disposed between the compression spring first end and the closer housing second end; an adjustment screw at least partially disposed in the closer housing along the longitudinal axis and proximate to the closer housing second end; a collar disposed in the closer housing and defining a threaded opening through which the adjustment screw passes, the threads of the adjustment screw engaging the threads of the opening, the collar adapted to travel along the adjustment screw as the screw is turned, the collar having a first face abutting the second end of the compression spring and having a circular periphery, a second face having a circular periphery, and a side extending between the circular periphery of the first face and the circular periphery of the second face, wherein the side defines a circumferential annular channel; a magnetic ball that is a permanent magnet disposed in the annular channel, the magnetic ball configured to move freely within the channel; and an indicator housing mounted to the closer housing external to the closer housing, wherein the indicator housing defines an elongated passage; and a magnetically permeable element disposed in the elongated passage of the indicator housing; wherein the magnetic ball moves the magnetically permeable element for indicating movement of the collar relative to the adjustment screw.