| 摘要 |
PCT No. PCT/FR88/00063 Sec. 371 Date Oct. 5, 1988 Sec. 102(e) Date Oct. 5, 1988 PCT Filed Feb. 5, 1988 PCT Pub. No. WO88/05916 PCT Pub. Date Aug. 11, 1988.A weathervane includes a pointer (8a, 8b) provided with a vane and mounted for rotation about a vertical shaft (1) by a magnetic bearing. The magnetic bearing is comprised of a lower block (2a) made integral with the shaft (1) and of an upper block (2b) capable of rotating freely about the shaft. An upper face of the lower block (2a) and a lower face of the upper block (2b) are each provided with a permanent magnet (10a, 10b), which face each other and are oriented so that they have the same polarity. The pointer (8a, 8b) is made integral with the upper block (2b).
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