Carl Milton Knobel, a retired electrician and church Sunday school superintendent, died of heart failure Monday at Good Samaritan Hospital. The Fullerton resident was 91.

Born in Baltimore and raised in Fullerton, he attended Fullerton School on Belair Road.

He retired Dec. 29, 1981, as an investigator for Baltimore County's Electrical Administrative Board. The County Council declared it Carl M. Knobel Day in recognition of his 16 years of service.

He earlier had run an electrical contracting business based in Fullerton, and as a young man was an estimator at the Washington Navy Yard.

He had been a member of Kenwood Presbyterian Church since 1930, and had served as a deacon, elder and for 26 years as its Sunday school superintendent. In 1959, the congregation dedicated its then-new church school building in his name.

Mr. Knobel also had been a commissioner from the Potomac Presbytery, attending a general assembly of the Presbyterian Church.

In retirement he made dollhouses, donating them to church bazaars.

Services will be held at 11 a.m. today at his church, 4601 Fullerton Ave.

Mr. Knobel is survived by his wife of nearly 70 years, the former Thelma Julia Williams; two daughters, Janet Jones of Richmond, Va., and Peggy Rowe of Perry Hall; five grandsons; and four great-grandchildren.