Abstract: In a rotating shaft machine having at least one shaft bearing, a lubricating system for circulating a liquid lubricant to and from the bearing. The lubricant, after engaging the bearing, flows to a reservoir containing a lubricant pool, which reservoir also embodies a heat pipe partially submerged in lubricant with at least one segment above the lubricant pool surface. A stream of air generated by a fan or other duct facility, is directed toward the exposed segment of the heat pipe whereby to cool the latter and consequently to effect heat exchange with the lubricant pool.

Abstract: A two part tool for aligning a pair of shafts. One tool part has two surfaces at 90 degrees from each other with each surface having a series of parallel lines, and an instrument for measuring distances parallel to an axis of a shaft from both a horizontal and a vertical direction. The second tool part provides for extending two clear parallel lined members to extend over and cover the cooperating lined surfaces on the first tool part and exhibit a Moire fringe pattern if the shafts are not angularly aligned, and an extendable target to cooperate with the instrument for measuring displacement parallel to the axis of the shaft.