Hemisphere-Drive SpeedsterMechanics and Handicraft October 1938 https://pulpcovers.com/wp-content/uploads/2018/09/Mechanics-and-Handicraft-October-1938.jpgvia info headinginfo contentvia
This magazine scores a mention at Wikipedia!https://en.wikipedia.org/wiki/Hemispherical_omnidirectional_gimbaled_wheelYou can also read some of the articles from this magazine here:http://blog.modernmechanix.com/issue/?magname=MechanicsAndHandicraft&magdate=10-1938Reply
This magazine scores a mention at Wikipedia!
https://en.wikipedia.org/wiki/Hemispherical_omnidirectional_gimbaled_wheel
You can also read some of the articles from this magazine here:
http://blog.modernmechanix.com/issue/?magname=MechanicsAndHandicraft&magdate=10-1938