JUMP MEASURED BY ELECTRIC EYE APPLICATION
Photo Electric Cells
June 10, 1941
Jump measured by electric eye application developed by General Electric engineers and tried out with great success at Schenectady track meet.
Four parallel beams of ligh[sic], an inch apart, are sent across from one upright to the other, and detected by photoelectric cells.
The photoelectric cells tell which, if any, beams are interrupted by the jumper's body.
Original Caption by Science Service