A power transmission for engines, motors, pumps and the like comprises a power shaft mounted to rotate about a fixed axis, an eccentric in the form of a tapered bar having arcuate ends secured on the power shaft to turn therewith, a power transmission ring having a circular internal bearing surface contacting the arcuate ends of the eccentric, a plurality of {HEAD ~ cranks} connected to {TAIL ~ the power transmission ring} by crankpins, each crank having a crankshaft journaled to turn about a fixed axis which is parallel to the power shaft 
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A power transmission for engines , motors , pumps and the like comprises a power shaft mounted to rotate about a fixed axis , an eccentric in the form of a tapered bar having arcuate ends secured on the power shaft to turn therewith , a power transmission ring having a circular internal bearing surface contacting the arcuate ends of the eccentric , a plurality of { HEAD ~ cranks } connected to { TAIL ~ the power transmission ring } by crankpins , each crank having a crankshaft journaled to turn about a fixed axis which is parallel to the power shaft
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