Abstract: A bone lengthening mechanism is placed into a bone which is then lengthened by extending the mechanism. The mechanism is extended by effecting a rotational movement in a drive bolt which mates with a threaded portion in a section of the mechanism. The threads convert the rotational movement to a longitudinal force thereby lengthening the bone.

Abstract: A method of applying brazing filler metal to a surface to form a brazed joint by plasma spraying the brazing filler metal on the portions of the surface to be joined.

Abstract: A dual polarized cross notch array employing a positioner for locating and grounding metallized portions of unrestrained element ends with respect to metallized restrained element ends. The positioner is a planar member having spaced rows and slots in intersecting rows and columns. Conductive tabs are formed adjacent to the slots at the intersections of the rows and columns corresponding to intersections of the element ends. The conductive tabs receive corresponding portions of the intersecting element ends in secure mechanical engagement and electrical contact. The positioner maintains the polarized elements rigidly in orthogonal configuration. In alternative embodiment employs conductive members preferably formed of tape at the inside corners of the array. Improved radiator elements and a positioner for preconfiguring the array is also disclosed.