Dual-motion apparatus

Apparatus for providing selectively from time to time in the same member either rotary motion about an axis or linear movement in an axial direction from one predetermined position to another predetermined position, comprising

• electric motor means including stator means comprising housing means and means for providing a first magnetic field within the housing means;
• rotor means comprising armature means for providing a second magnetic field within the housing means, on shaft means in the housing means;
• all of said means being coaxial;
• and
• commutating means and associated circuit means for conducting electrical energy to the motor means in such manner as to provide rotation of the shaft means in a predetermined direction and to provide axial movement of the shaft means in a predetermined direction;
• wherein the commutating means comprises electronic commutating means, or controlling the conduction of the electrical energy to the stator means, comprising electromagnetic means for providing the first magnetic field so as to be substantially perpendicular to the second magnetic field provided by the rotor means.

Apparatus for providing selectively from time to time in the same member either rotary motion about an axis or linear movement in an axial direction from one predetermined position to another predetermined position, comprising

• electric motor means including stator means comprising housing means and means for providing a first magnetic field within the housing means;
• rotor means comprising armature means, for providing a second magnetic field within the housing means, on shaft means in the housing means;
• all of said means being coaxial;
• and
• commutating means and associated circuit means for conducting electrical energy to the motor means in such manner as to provide rotation of the shaft means in a predetermined direction and to provide axial movement of the shaft means in a predetermined direction;
• wherein the commutating means comprises electronic commutating means, for controlling the conduction of the electrical energy to the stator means, comprising electromagnetic means for providing the first magnetic field so as to have a component substantially perpendicular to the second magnetic field provided by the rotor means and a component substantially parallel to the second magnetic field.