A 1950s father is a dad who is not involved with thier child or children, even though they all live under the same roof. A 1950s father does not play, spend time or is emotionally involved with thier child. A 1950s father is typically stoic and distant to ones child, and are typically work-a-holics. The phrase comes from a generation of males (pre 1960s) that were raised to hid thier emotions, because it would seem unmanlike. 1950s father reley on thier wife to do all the parenting.
My friend's dad is not really involved in his life. He is what you call a 1950s father.