 Calvin D. MacCracken

Calvin Dodd MacCracken, also known as Cal (1919-1999) was an American inventor who made important contributions to energy storage technology and the construction of ice rinks.Calvin D. MacCracken, nicknamed Cal, was born in Poughkeepsie, New York to Henry Noble MacCracken, a president of Vassar College  and Marjorie Dodd MacCracken.