A pole piece assembly for an electric motor formed of stacked interlocked lamina that define a first set of stacked lamina and a second set of stacked lamina. s1, to encourage gas transfer into the liquid phase and avoid too much attrition of the catalyst grains. If the player chooses to purchase a different paytable, the gaming device determines a game outcome for a plurality of plays of the game and provides any awards based on the different paytable. The base section and a plastic cover are configured to provide a cavity when the cover and the base section are affixed with the integrated circuit chip being disposed with such provided cavity. The engine controlling signals are responsive to rotational speed and direction of rotation of a manual control knob and the frequency of light pulses of an optical encoder. Auxiliary gripping members are provided in opposed relation on each of the gripper arms for adjusting the effective gripping action afforded by the gripping arms to accommodate multiple size pipes.