Changes of the Week

P: Ralph H. Demmler, 48, of Pittsburgh, was finally cleared by Pennsylvania's Senator Ed Martin as a member of the Securities & Exchange Commission. He will take over the chairmanship. Son of a well-to-do family (Demmler Brothers Co., distributors of sheet-metal products), Ralph Demmler attended Allegheny College and the University of Pittsburgh, was admitted to the Pennsylvania bar in 1928, and became a specialist in corporate and banking law. No stranger to SEC procedure, Demmler worked with the commission on cases involving Pittsburgh's Mellon National Bank and Trust Co. and the Duquesne Light Co., handled all the legal matters for the Equitable Life Assurance Society's development of Pittsburgh's 23-acre Golden Triangle Gateway Center development.

P: H. (for Henry) Earle Muzzy, 62, executive vice president .since 1947 of The Quaker Oats Co., one of the nation's largest cereal-makers (1952 net sales: $263,700,000), moved up to the presidency after 40 years with the company. He succeeds R. (for Robert) Douglas Stuart, 67, newly named U.S. Ambassador to Canada.

P: John T. (for Terry) Brown, 50, executive vice president of the J. I. Case Co., farm-equipment manufacturer of Racine, Wis., became president, succeeding Theodore Johnson. Brown, who was a vice president of Milwaukee's Chain Belt Co., joined Case in 1948 as vice president in charge of manufacturing plants.

P: Joseph Paul DiMaggio Jr., 38, onetime vice president in charge of batting, fielding and gate receipts for the New York Yankees, was appointed vice president in charge of public relations on the West Coast for Buitoni Foods Corp., makers of spaghetti and other pasta products.

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