| 摘要 |
<p>The transducer is for providing a signal from which the axial position of a rotary shaft (10) can be determined and comprises a pair of sleeves (11,12) surrounding the shaft and mounted one within the other. The sleeves have flange portions defining surfaces (17,16) carrying a magnetic recording medium and mounted adjacent the surfaces is a recording/playback head (19) which can be used initially to record a signal on the surface and is used subsequently to provide a signal or signals when magnetised zones on the surfaces pass the head. The sleeves are provided with slots (14,13) which are engaged by a pin (15) on the shaft. The slot (13) is parallel to the axis of the shaft whilst the slot (14) is inclined so that the two members will move angularly relative to each other as the shaft moves axially, producing a related change in the interval between the signals from surfaces (16,17).</p> |
