Abstract: A cooling and lubrication arrangement for a bearing supporting a rotatable shaft wherein the bearing housing includes, a self contained lubrication system for the bearing, and an operatively associated improved cooling fluid flow chamber therein. The bearing housing has supporting structure to minimize conductive heat flow to the bearing and the improved cooling fluid flow chamber has one relatively thin supporting wall adjacent the bearing and is provided with an internal geometry which forms a zone of high velocity cooling fluid closely adjacent the said thin supporting wall to achieve a high heat transfer rate from the bearing to the cooling fluid flowing through the improved cooling fluid flow chamber.

Abstract: A turbine diaphragm assembly comprising a hub and a spaced retaining ring with an arcuate array of investment cast nozzle blocks having interfitting shroud segments disposed therebetween with the exit edges of the nozzle blades being substantially radially disposed and the flow passages having constantly uniform throats throughout the full radial extents thereof to maximize turbine efficiency. Manufacture is effected by arcuately grooving the front side of a plate, disposing the arcuate nozzle block array in the groove and bonding the same therein, and removing the web from the other side of the plate to open the flow passages.