Abstract: A multiple phase inductor includes a magnetic core having two end pieces and a plurality of legs extending between the end pieces to form flux paths which pass through the end pieces and the legs. Each leg includes a stack of "I" shaped laminations which are positioned between the end pieces to form two gaps in at least one of the flux paths. A coil is wound around each of the legs and all of the coils present substantially the same inductance to an external power circuit. By providing two gaps in each of the legs, localized heating of the turns of the coils is reduced.

Abstract: A liquid cooled electric generating apparatus is provided with a liquid circulation system that is divided into two portions. One of the portions includes a rotor mounted in a rotor cavity such that rotation of the rotor expels liquid from that portion of the circulation system. A normally open valve connects the two portions of the liquid circulation system. This valve is automatically closed during filling of the portion of the liquid circulation system which does not contain the rotor cavity. Both the liquid circulation system of the generating apparatus and the method of filling the system are encompassed by this invention.

Abstract: An electric relay is provided with pairs of stationary electrical contacts for connection to an electric circuit, movable bus bars positioned at axially spaced locations along an actuating shaft, and a mechanism for moving the shaft in an axial direction between first and second positions. Compressible biasing assemblies are positioned along the shaft between the conductive members and stops are positioned at the axially spaced locations to limit movement of the compressible biasing assemblies. The conductive members have an opening for receiving the stops and are capable of axial displacement with respect to the stops. Movement of the actuating shaft compresses each of the biasing assemblies between one of the stops and one of the conductive members thereby providing an axial force to press the conductive members against a pair of stationary contacts.

Abstract: An inductor assembly is provided with turns of a coil conductor that encircle a leg of a magnetic core and are insulated from the core. Each of the turns includes a portion which extends through an aperture in the core and a second portion positioned outside the aperture. The surface area per unit length of the second portions of selected turns is greater than the surface area of the portions of the turns which extend through the aperture. These portions of increased surface area are spaced apart to permit the flow of cooling medium between the turns.

Abstract: A rectifier assembly for use in the rotor of an electrical generator is provided with a plurality of generally disc-shaped diode packages arranged in a stack along a common axis. Radial bus bars are positioned between the diode packages and extend radially beyond the diode stack. Electrically and thermally conductive through bolts extend between a pair of end members on opposite ends of the diode stack and are electrically connected to the radial bus bars. Each of the through bolts includes a longitudinal opening for receiving cooling fluid. Selected ones of the through bolts are held in tension between the end members, thereby axially compressing the diode and radial bus bar stack. Spring terminals are provided for electrically connecting the through bolts to an external circuit and the entire assembly is conveniently packaged as a plug in module.

Abstract: A disc-type semiconductor mounting arrangement is provided with force distribution spacers. One side of each spacer contains a counterbore which prevents contact between the center of the spacer and other elements of a stack of semiconductors and associated heat sinks and bus bars. Compressive force applied to the assembly is thereby distributed across the semiconductor pole area.

Abstract: An assembly of disc mounted, compression bonded-encapsulated, semiconductor devices is provided with positioning elements from the sheet metal serving as a heat sink and electrical bus adjacent the device contact face. A plurality of holding fingers stamped from the sheet metal grip the device side surface and permit placing the device in position accurately so the clamping elements apply proper force along the device axis.