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 Reply
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