Last week U. S. inventors had perfected these things:
> A triple-acting Diesel engine with two pistons operating in the same cylinder won Patent No. 2,228,472, assigned to Sun Shipbuilding & Dry Dock Co. Claims: delivery, per pound of engine weight, of more than double the power of previous similar Diesels; cheap construction and operation. Two opposed pistons move synchronously together and apart in the cylinder. When closest together, they form between their inner heads a combustion chamber. Fuel is injected here and ignited by heat of compression (as in all Diesels), driving the pistons apart. Now two other combustion chambers...
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