Abstract: In a compressor assembly, the motor compressor unit is vertically supported by lower bearing head which receives the crankshaft of the compressor. The lower bearing head is vertically supported by a positioning plate which is in turn vertically supported by a spring which is received in a recess in the casing. The mounting structure comprising the head, the plate and the spring coact to provide the sole vertical support of the motor compressor unit. This single vertical support is stable because the center of gravity of the compressor is coaxial with the centerline of the spring. The position plate may be rotated to accommodate compressors having different centers of gravity.

Abstract: A device for permitting the simultaneous transfer of a plurality of silicon wafers from one wafer carrier to another, and particularly for permitting a mass transfer between carriers having different wafer spacings. The device comprises two rectangular frames with a portion of the upper frame extending into the lower frame. Both frames are provided with a plurality of wafer slots although in the lower frame there is a greater number of slots and they are more closely spaced than in the upper frame. Each frame is adapted to interface with and be releasably secured to a carrier having a like number of wafer slots. The upper frame is slidable within the lower frame and means are provided to register its slots with different groups of the slots in the lower frame.