John H. Williams Sr., 72, a native Washingtonian who was a teacher and counselor in the D.C. school system for 46 years, died Monday at Georgetown University Hospital of cardiorespiratory arrest.

Mr. Williams, a graduate of D.C. Teachers College, taught at E. V. High and Bell Vocational High schools. In 1925, he was one of the organizers of the first D.C. school safety patrols. He also served for 20 years as assistant director and consultant for the D.C. school safety patrol officers' summer camp program.

Because he was co-organizer of the U.S. Navy model aircraft recognition program during World War II, he supervised a similar program for the D.C. public schools. He retired from the school system in 1970.

Under the name Mr. Fixit, he produced and performed on one of the first educational TV programs in the Washington area.

Mr. Williams also served on the original National Aeronautics Association Committee. He was a member of the D.C. Retired Teachers Association, National Retired Teachers Association, American Vocational Association and American Association of Retired Persons.

Survivors include his wife, Thelms M., of the home in Silver Spring; a son, John H. Jr., of Silver Spring; a daughter, Norma M. Smith, of Kensington; a sister, Irene V. Hendrickson, of Hollywood, Md., two brothers, Raymond, of Hyattsville, and Francis J., of Marietta, Ga., five grandchildren and one great-grandchild.

The family suggests that expressions of sympathy be in the form of contributions to the National Kidney Foundation's direct patient benefit fund.