How is it determined in a race who has finished first, is it reliant on the lane judge to click or is there some electronic monitoring somewhere?
Swimming
- Thread starter ricicle
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...Bill Parkinson, a physics professor at the University of Michigan
Had copper wire sewn in a zigzag pattern into a rubber mat,mounted on an aluminum plate. Such that when a swimmer pressed the mat, the wires would touch the aluminum plate, thereby completing a circuit and triggering an electrical timepiece and placing system. Parkinson attached a second sheet of rubber over the first to ensure insulation. Parky filled the pad with non-conductive, silicone oil. The oil neutralised the water pressure, keeping it from closing the circuit, but offered no resistance to a hand touch... In full use since the 70's.
The Not So Bad Ol' Days ???
Handling or trying to handle 'water turbulence' during racing was also a headache...
Had copper wire sewn in a zigzag pattern into a rubber mat,mounted on an aluminum plate. Such that when a swimmer pressed the mat, the wires would touch the aluminum plate, thereby completing a circuit and triggering an electrical timepiece and placing system. Parkinson attached a second sheet of rubber over the first to ensure insulation. Parky filled the pad with non-conductive, silicone oil. The oil neutralised the water pressure, keeping it from closing the circuit, but offered no resistance to a hand touch... In full use since the 70's.
The Not So Bad Ol' Days ???
Handling or trying to handle 'water turbulence' during racing was also a headache...
