Based on

Movies like Pluck and Plotters (1918)

He is the utterly inept janitor in an office building, where an inventor is busy cutting a deal for a new sort of -- well, it looks like it might be a racing car, but it might be a zeppelin. But when Larry is not wielding a broom and forcing everyone into either ducking or taking a pratfall, or dunking an ice cube into the water cooler like an over-sized tea bag, he is fouling up industrial espionage.