No exhibitor or other person shall exhibit, operate or have in his possession a machine which is so constructed as to make possible, either directly, or by the use of an adjustment, the return of cash, tickets, discs or other tokens or certificates of any kind to a player operating the same, whether or not such tokens or certificates have a value of any kind or authorize further playing or other privileges. Only machines operated exclusively: for the amusement provided by the operation thereof shall be licensed. (Ord. 446-A. Passed 11-5-48.)