§ 80. Couplers. It shall be unlawful for any railroad or other company
to haul, or permit to be hauled or used, on its line or lines within the
state, any freight car not equipped with couplers of the master car
builders' type, and coupling automatically by impact, and which can be
uncoupled, except in cases of accident, without the necessity of men
going between the ends of the cars.