human dynamo

For more than twenty years Hermann Sielcken was the human dynamo that pushed the firm forward into a place of world prominence.

To see Hughes in action is to get the impression of a human dynamo suddenly let loose.

The "human dynamo" is a man who long ago learned the lesson of scientific management of his own mental forces.

Constance, you human dynamo, we'll go in by all means, and hold our breaths listening to your 'resting'!

Young Mr. Mayfair admired himself as being something of the human dynamo.