Abstract: A lubricant seal for an oil lubricated ball bearing journalling a shaft within the cavity of a stationary housing. The lubricant seal comprises an annular rigid oil sling affixed to the shaft within the cavity. The oil slinger is formed of an oil absorbing material adapted at low or nonrotational speed of the shaft to absorb excess oil within the housing cavity and at high speed to centrifuge oil into the bearing.

Abstract: An assembly for transferring heat at cryogenic temperatures across an interface space between a relatively fixed refrigerated cold finger and a relatively movable Dewar vacuum flask having an infrared detector array mounted therein. The interface assembly is formed of two opposing thermal conducting plates which are spring loaded so as to be in intimate contact with both the end face of the cold finger and a face of the opposite side of the mounting element for the detector array in the Dewar vacuum flask. A flexible thermal conductor element surrounds the spring and is securely connected to the opposing plates to complete the thermal conduction path between the flask and the cold finger. A first preferred embodiment of the assembly utilizes a bellows shaped flexible thermal conductor which allows the plates to make intimate contact with their corresponding faces even though the faces may be oriented in non-parallel configurations.