Abstract: A window assembly comprises, a first base member and a second base member, both being of general T-shaped configuration, and having a middle portion and two transversely extending arms. The arms have a longitudinal channel and a plurality of longitudinal slots therein. The middle portion of the second base member is slidably insertable in the longitudinal channel of the first base member. A window assembly further comprises first and second window panes being removably inserted in the longitudinal slots formed in the arms of the first and second base members. A plurality of seals are positioned in the slots and serve to sealingly support the first and second window panes in the respective sots. A seal is also positioned between the second base member middle support and the first base member longitudinal channel and is in sealing engagement therewith. A plurality of plastic blocks are positioned between the first and second base members and are in sliding engagement therewith.

Abstract: An improved fan construction for use with engines utilizing circulating coolant and radiators, including a shaft adapted to be mounted on an engine or the like, a sheave journalled on the shaft, and fan blades carried by the sheave and rotatable therewith. An annular ring of resilient material is disposed about the fan blades and has an inner diameter spaced slightly radially outwardly of the tips of the fan blades and an outer periphery adapted to slidably, peripherally, sealingly engage a radiator shroud or the like about the periphery of an orifice therein and a perforate support for the ring secured to both the ring and the shaft.