The image on the left is a motor steering wheel of a Hurtu cab. The image on the right is an example of a steering motor wheel arrangement. In this image, the worm gear and pinion device turns the stud axle around with an attached motor and gearing.
Homans, James E. A Practical Illustrated Treatise on Automobiles (New York, NY: Theo. Audel & Company, 1907) 64
Courtesy the private collection of Roy Winkelman