An electrically-driven moving apparatus for a microscope includes a control device for rotating and stopping an electric motor on the basis of outputs of a detector for detecting a rotational quantity of an operation handle and of a detector for detecting a position changing quantity of a stage. ...http://www.google.com.tw/patents/US5825531?utm_source=gb-gplus-share專利 US5825531 - Electrical moving apparatus for microscope
