Closed Circuit Oxygen Rebreathers
- For more information see Porpoise (make of scuba gear)#A make of diving oxygen rebreather.
Eldred's initial efforts were to make an oxygen rebreather safe for sporting use. Pure oxygen used in early rebreathers causes CNS poisoning below 33 fsw. Eldred reasoned that the rebreather should be designed to stop flowing oxygen when the diver descended below that depth. At a demonstration by the Flinders pier, on Western Port Bay, south east of Melbourne, a diver passed out because he failed to purge the system of air. This failure to purge had resulted in a nitrogen build up. Eldred realized at this point that he needed to turn his efforts toward open circuit compressed air breathing apparatus. He was accompanied on this demonstration by Bob Wallace-Mitchell, who would become his distributor.
Read more about this topic: Ted Eldred
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