Salvage. New York local story. Keys to Uncle Sam's arsenal for democracy. Ranging in size form a tiny jewelcase opener to a massive half-pound brass device used in a French chateau grilled door, a donor turns over to the salvage drive more than 200 keys weighing five pounds, one ounce to Mrs. Mortimer Hess, vice chairman of the Women's Division of the New York City Salvage Committee at its headquarters in the Channing Building. Soon these keys will be on their way to the smelters to refine into new steel and brass to make America's guns and cartridges