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 {HEAD ~ the power shaft} to turn therewith, a power transmission ring having {TAIL ~ a circular internal bearing surface} contacting the arcuate ends of the eccentric, a plurality of cranks connected to 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 
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 { HEAD ~ the power shaft } to turn therewith , a power transmission ring having { TAIL ~ a circular internal bearing surface } contacting the arcuate ends of the eccentric , a plurality of cranks connected to 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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