The courts, he wrote, are the substations that transform the high-tension charge of the philosophers into the reduced voltage of a serviceable current.
Hamstrings are a relatively high-tension structure, which predisposes them to injury - they're actually one of the most common leg injuries in athletes.
His first successful patented inventions, patented in 1909, were an electrothermostatic heat regulator for more effective control of stove and toaster heating elements and a thermostat for high-tension power cables.