Wheaton, Graydon Maxwell, of Lexington, Aug. 28, 2016. Husband of the late Iris (Ellis) Wheaton. Father of Sandra E. Lechiaro and her husband Joseph of Framingham, and the late Patricia Heron. MIT Graduate, Class of 1956; Aeronautical Engineer at Draper Labs for 46 years. A Graveside Service will be held Friday Sept. 2 at Westview Cemetery, 520 Bedford St. Lexington at 11am. Relatives and friends are kindly invited to attend. In lieu of flowers, donations in Graydon's memory may be made to MSPCA – ANGELL, 350 South Huntington Ave. Boston, MA 02130.