Signal and power communication system positioned on a rotatable shaft

A surgical instrument assembly, comprising:

• a shaft assembly comprising a drive member;
• an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position;
• a magnet configured to generate a magnetic field;
• a rotatable shaft operably coupled with said drive member, wherein said rotatable shaft is rotatable about a longitudinal axis to drive said drive member;
• a wire coil mounted to said rotatable shaft, wherein said wire coil is positionable in said magnetic field, and wherein said wire coil is rotated within said magnetic field when said rotatable shaft is rotated about said longitudinal axis which induces a current in said wire coil;
• and
• a circuit mounted to said rotatable shaft, wherein said wire coil is electrically coupled to said circuit, and wherein said circuit is powered by said current induced in said wire coil.

A surgical instrument assembly, comprising:

• a shaft assembly comprising a drive member;
• an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw;
• a rotatable shaft operably coupled with said drive member;
• a circuit mounted to said rotatable shaft;
• means for generating an electromagnetic field;
• and
• means mounted to said rotatable shaft for generating electrical power and for supplying electrical power to said circuit when said rotatable shaft is rotated within said electromagnetic field.