A look back...
at upright vacs from the past show a similarity of design: a vertically mounted fan with a side discharge chute, and a nozzle tapering down from the fan opening to the floor on each side. GE made a few models that looked remarkably like the classic omega, except the nozzle was not removable. Even the color was similar.
Hoover Juniors and Larks used this format, but full size Hoovers, and then Eurekas flipped the design forward and put the taper flat on the floor with the motor resting on top. There are basically three configurations of the single motor, open fan upright, the two mentioned and the Singer (Sunbeam) style with the motor at the back of the square base with a fan at each end of the motor shaft. Anyone know of any other basic configurations without going to a two motor, or a clean fan design?