Richard N. Weeks, president of Weeks Stevedoring Co., Inc., Cranford, N.J., has announced the purchase of the two floating cranes Luria Brothers & Co. Inc. used at Port Newark to load scrap iron. The cranes are Clyde Model 20-DE-65+32 equipped with 80-inch-deep magnets, clamshell buckets, and grapples. Weeks Stevedoring Co., Inc. is the largest bulk stevedore in the Port of New York, and now has 14 floating cranes in operation with capacities up to 14 cubic yards.