| 摘要 |
<p>The invention relates to a motor drive with a position indicator, for actuating a sequence shift, a change-over switch or a moving core coil. The invention provides for a first circular scale (2) provided with symbols allocated to each switching stage involved in changing from one motor drive working position to another. Said first scale (2) is swept by a pointer (3) which rotates with 360 each time a switching occurs. There is also provided a second circular scale (4) whereon other symbols allocated to each possible working position of the sequence shift or similar are provided. Said second scale (4) is also swept by a pointer (5) which rotates about an angle corresponding to the distance between two adjacent symbols on the second scale (4) each time a switching occurs. On both sides of the second pointer (5), some trailing pointers (6 and 7) are placed in such a way that, when a second pointer (5) moves, one of the trailer pointers (6 and 7) is driven, depending on the direction of rotation thereof. This way, the trailing pointers indicate the actual control range which is swithched.</p> |
