Patent ID: 6175694
Filing Date: 2001-01-16
Classification: G03B,Y10T

Abstract:
A power transmission apparatus, comprising:a first rotation portion which is rotatable and transmits a driving power by rotation thereof;a second rotation portion which is rotatable and revolves around said first rotation portion in association with rotation of said first rotation portion;a plurality of operation systems, each of which is selectively engagable with said second rotation portion by revolution of said second rotation portion around said first rotation portion, so as to receive the driving power from said first rotation portion;a restriction device which restricts revolution of said second rotation portion around said first rotation portion;a determination device which determines a revolution position of said second rotation portion relative to said first rotation portion; anda control device which rotates said first rotation portion so as to cause said second rotation portion to revolve around said first rotation portion to a position where said second rotation portion engages a predetermined operation system of said plurality of operation systems when said first rotation portion finishes a driving operation, and controls said restriction device so as to regulate revolution of said second rotation portion through to the position where said second rotation portion engages the predetermined operation system in accordance with a determination of said determination device.