Abstract: A method for controlling frost on a heat transfer device includes the steps of providing an air flow device adapted to provide a stream of air at a high flow rate, and using the air flow device to subject a heat transfer device to the stream of air during frosting times. The stream of air interacts with the heat transfer device to remove water droplets disposed on the heat transfer device, thereby preventing frost from accumulating on the heat transfer device.

Abstract: An elastic drive coupling between an electrically powered hollow drive shaft and the drive wheel of a track operated vehicle such as for example an electric locomotive wherein an annular coupling plate is located adjacent to but spaced from the inner side of the drive wheel and the inner periphery of the coupling plate is secured to the hub of the drive wheel. The outermost of two concentric, radially spaced rings surrounding the hollow drive shaft and between which a rubber-containing elastic member is secured, is fixed to the outer periphery of the coupling plate and the innermost ring is fixed to the hollow drive shaft.