| 摘要 |
<p>A teaching device is provided for use in teaching a computer a program for moving a tool through a three dimensional space and along a predetermined path having a socket at one end for attachment to the tool and at its other end a cavity in which a ball is seated so that the ball may contact and be moved over means defining the predetermined path. Preferably, the teaching device forms a part of an electric circuit used in protecting the teaching device from destruction or other damage.</p> |
