Tumbling rod - definition of Tumbling rod by The Free Dictionary
Instead of a belt, power was transmitted from Horse powers by a drive shaft, which ran close enough to the ground for the horses to step over it each time they came around. Once outside the horses’ path, the shaft could either be directly coupled or belted to the machine to be powered.
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References in periodicals archive
"There is no flywheel to allow you to connect to an outside load, although Jim Briden came up with a tumbling rod
assembly that allowed the roller to connect to the prony brake, where it produced 31 bhp (brake horsepower)."
As the animals were made to walk upward and forward, their weight forced the sloping "floor" to move to the rear, turning a belt pulley or a tumbling rod
, or moving a lever that drives the machine.