15 U.S.C. § 1178

to any machine or mechanical device designed and manufactured primarily for use at a racetrack in connection with parimutuel betting,

to any machine or mechanical device, such as a coin-operated bowling alley, shuffleboard, marble machine (a so-called pinball machine), or mechanical gun, which is not designed and manufactured primarily for use in connection with gambling, and (A) which when operated does not deliver, as a result of the application of an element of chance, any money or property, or (B) by the operation of which a person may not become entitled to receive, as the result of the application of an element of chance, any money or property, or

to any so-called claw, crane, or digger machine and similar devices which are not operated by coin, are actuated by a crank, and are designed and manufactured primarily for use at carnivals or county or State fairs.