The above are from David's great vintage car site Old Motor http://theoldmotor.com/?p=20051
below I've posted before, and show them here in context to demonstrate some other odd spring focused rims... to read about their history http://blog.hemmings.com/index.php/2010/10/19/earlier-and-resilienter/
The new system put the wheels on stub axles and linked them with a bar so that they turned in parallel. Ackermann was requested to take out an English patent for it, but, as he explains in his preface to Observations on Ackermann’s Patent Axle 1819, unless the inventor appeared at the Patent Ofﬁce in person then his agent was obliged to register the patent in his own name. Ironically it is still known as Ackermann’s Axle - poor old Georg Lankensperger is totally forgotten - and Ackermann’s Steering System is still used on the car you drive today.