Abstract: Manufacture of a turbine diaphragm assembly is effected by forming an arcuate V-shaped nozzle block mounting groove on the front side of a generally cylindrical plate so that the respective side surfaces of the V-shaped nozzle block mounting groove has a predetermined slope with respect to the longitudinal axis of the cylindrical plate, investment casting a plurality of individual nozzle blocks each of which includes, a nozzle blade extending in curvilinear fashion between an inner and an outer shroud segment which shroud segment on each nozzle block interfits with the inner and outer shroud segment of each of the other nozzle blocks, the said inner and outer shroud segments being sloped on their outer surfaces to correspond with the slope of the respective inner and outer side surfaces of the V-shaped nozzle block mounting groove so that an arcuate array of said nozzle blocks can be mounted in said V-shaped nozzle block mounting groove in interfitted, side by side relationship in such a manner that the respe

Abstract: In an electrical power generating installation which includes a plurality of turbine-generator sets, a parking bus is disclosed, which is provided with a potential regulated at a relatively low and constant frequency of the order of 1-2 Hz. Switching and phase and frequency matching means are provided, which enable the same controlled variable frequency starting system used for start-up of the turbine-generator sets, to be used for gradually adjusting the rotational speed of a selected turbine-generator set to a point where phase and frequency may be matched with that of the parking bus, to then permit the generator member of such set to be electrically transferred to the bus. By means of such arrangement, any number of turbine-generator sets may be connected in parallel to the parking bus which thereupon effects a simultaneous, continued low speed rotation of the sets for cooling or other purposes.

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.

Abstract: A safety trip valve for interrupting the flow of working fluid to fluid operated machinery is actuated to closed position by unbalanced forces produced thereon by the pressure of the working fluid on occurrence of adverse operating conditions. After closure of the trip valve, pressure force unbalance is maintained by a pressure responsive transfer valve assembly in the trip valve which prevents sudden automatic opening of the trip valve when the adverse operation condition is corrected. A mechanical positioner in operative association with the transfer valve allows the working fluid to produce a net force in the opening direction, which causes the trip valve to follow the mechanical positioner as it is moved by the operator from closed to open position.

Abstract: An integral mechanical governor for controlling the speed of prime movers, such as steam turbines is disclosed as a separate structure that can be mounted on and coupled to the shaft of the associated prime mover. The device includes a housing having at least one end opening and closure means for the open end of the housing, the housing and closure defining a governor assembly chamber and a sump for lubricating fluid. The end wall remote from the open end has an inboard bearing means for rotatably mounting a driven shaft disposed to extend from the governor assembly chamber through the bearing to the exterior of the housing to permit said driven shaft to be coupled to the shaft of the prime mover when the integral mechanical governor is mounted thereon in assembled position.