An operational mode control apparatus and method for a VCR utilizing a shuttle ring comprises a shuttle section having a shuttle ring and providing a digital signal corresponding to a rotational angle of the shuttle ring, and a microcomputer for determining a divided region of the rotational angle of...http://www.google.ca/patents/US5424848?utm_source=gb-gplus-sharePatent US5424848 - Operational control apparatus and method for a video cassette recorder utilizing a shuttle ring
