Abstract: A compact game playing apparatus that is easy to carry and use when traveling. The apparatus contains an elongate sheet coupled to two spindles. A plurality of game playing surfaces are printed on the elongate sheet, and rotation of the spindles operate to align a selected one of these game playing surfaces with a window in the apparatus housing. A magnet attracting metal surface is positioned below the exposed game playing surface so that game pieces, which include magnets, may be placed on the game playing surface without being inadvertently displaced. The housing further contains an integral die throwing apparatus, and an integral drawer for holding game pieces when not in use.

Abstract: In synchronous electric motors of the type having a movable multipolar permanent magnet member and a stator comprising magnetic circuits coupled to a control coil. The magnetic circuits form an air-gap of variable height in which the permanent magnet member is movably arranged.The improvement defines the height of the air-gap as a function of the position of the movable member, taking into account various design parameters of the motor, in order to obtain a purely sinusoidal variation of the torque produced in each phase of the motor by a constant control current.