Abstract: A vehicle docking aid is disclosed in which a docking indicator is suspended by cord means attached to the door or wall of a garage. Intermediate hooking means are provided to raise the indicator out of the way when the garage is empty and the door is up. When hooked to the top of the garage door, the indicator is automatically disengaged when the door is lowered and the indicator thus returns to its normal position.

Abstract: A continuous cleaning and preheating system for steel strip to be annealed prior to being coated or otherwise treated wherein controlled reducing steps are employed to remove surface contaminants from the strip, which system uses direct flame heating whereby the combustion gases from open flame burners within a closed furnace flow into and along a restricted elongated tubular zone so that the gases are in direct contact with the strip as it enters and passes through the tubular zone and the furnace in a direction countercurrent to the flow of the said gases.