Superman: The Mechanical Monsters (1941)

 

        

        
 

Great example of 40's animation. Color and movement and backgrounds are first rate for the day. Two things cracked me up. One, this guy can build flying robots, but he can't figure out how to keep the door latched on their backs, and two, as the villain is lowering Lois into the molten metal he insists that she tell him where the jewels are when he has tied a gag around her mouth. No wonder he was stupid enough to think his robots could destroy Superman.