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 oversized tea bag he is fouling up industrial espionage