| 摘要 |
In a rotary position sensor contact grease may be used without the risk of failure in contact making al very low temperatures. The rotary position sensor has a contact disk (16) driven in rotation about an axis (18). The sensor comprises a set of electrically conductive contact tracks (20, 22, 24) extending concentrically the axis on a face of the contact disk (16). A set of contact members (26, 28, 30) are held stationary opposite the contact disk (16) face in sliding engagement with the contact tracks. The contact tracks (20, 22, 24) are covered with a thin layer of contact grease, and a scraper member (32) is slidingly engaged with the contact tracks. Due to the action of the scraper member (32), the contact tracks are only covered with a thin film of contact grease that is safely penetrated by the contact members even in a state of high viscosity. <IMAGE>
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