Pedrail

A device intended to replace the wheel of a self propelled vehicle for use on rough roads and to approximate to the smoothness in running of a wheel on a metal track The tread consists of a number of rubber shod feet which are connected by ball and socket joints to the ends of sliding spokes Each spoke has attached to it a small roller which in its turn runs under a short pivoted rail controlled by a powerful set of springs This arrangement permits the feet to accomodate themselves to obstacles even such as steps or stairs The pedrail was invented by one B J Diplock of London Eng