| 摘要 |
<p>The arrangement is for sensing the rotary movement of a rotary device. The arrangement comprises a sensing member which is arranged to be subjected to a predetermined actuation when the rotary device has rotated a predetermined number of revolutions, and two rotary members are arranged to rotate at mutually different speeds, directly proportional to the rotary speed of the rotary device. They are provided with actuating devices arranged to cooperate with each other so as to cause the predetermined actuation of the sensing member when the two rotary members reach a predetermined relative position.</p> |
