Do you know for sure that he died between 1950 and 1960 or are you estimating that from his year of birth, which I am seeing as 1882?
There is a claim date in 1947 on his Social Security record. that looks like when he retired. But there is a date of 8 October 1976 as well. That could be his year of death, age 94.
Was he born in Fayette City, PA ?
a probable son, same name and initial, was born 1911 and died July 30, 1996.