Abstract: A computer interface system that is worn on the middle fingers of both hands of the computer operator for controlling cursor movement is disclosed. The system includes a left and right hand fixed inner ring, the inner rings being of a dimension suitable to be worn on a portion of the middle fingers of the computer operator, and a left and a right rotatable outer ring. The system includes sensing elements disposed between each of the corresponding inner and outer rings for producing horizontal movement signals in response to the rotation of the left outer ring in relation to the left inner ring, and for producing vertical movement signals in response to the rotation of the right outer ring in relation to the right inner ring. The system also includes a pressure sensitive element disposed between corresponding inner and outer rings that produces an entry signal in response to the application of pressure on the outer ring toward the inner ring.

Abstract: A mechanical manipulator which includes fingers under the control of a computer, antenna sensing means mounted on such fingers and extended and retracted from the fingers under the control of the computer, means for detecting the contact or proximity of the extended antenna sensing means with a workpiece, means responsive to the antenna sensing means for retracting the sensing means from interference with the workpiece and for adjusting the control of the fingers. The fingers are adapted for X, Y and Z linear motions and provides pitch, yaw and roll angular motion. The retractable antenna sensing means resembles a whisker which extends from the finger and makes contact with or approaches the workpiece. The antenna sensing means may include a retractable pneumatic back pressure sensor via the back pressure of a fluid in the supply, created when the fluid impinges on the workpiece. The retractable antenna whisker bends more readily than the rigid finger.