Adventure Comics #53

The Hourman investigates the suspicious deaths of twelve children who work in a factory owned by a Mr. Tareff. After rounding up the villains, Hourman meets with the brother (Jimmy Martin) of one of the dead children from the factory, and discovers that he is a ham radio operator. The Man of the Hour suggests that Jimmy enlist the aid of hams all over the nation to assist in the fight against crime with Hourman, and that they call themselves The Minute-Men of America!