| 摘要 |
PCT No. PCT/GB89/00755 Sec. 371 Date Feb. 6, 1991 Sec. 102(e) Date Feb. 6, 1991 PCT Filed Jul. 4, 1989 PCT Pub. No. WO90/00717 PCT Pub. Date Jan. 25, 1990.A probe for position-determining apparatus and the like has a housing (10) and in the housing a sensing space (60) and an aperture (915) to the sensing space, a stylus (40) extending out of the sensing space through the aperture, a low-friction stylus support (50;17) around the aperture, a resilient element (20;120) for constraining the stylus on to the support and generally towards a neutral axis while permitting position-determining displacement on the support against the constraining element, which is outside the sensing space, while in the sensing space is a sensing arrangement (30, 42; 30, 42, 35, 37) separate from the constraining element to sense directly significant movement of the stylus from the neutral axis without contact with the stylus and to indicate such significant movement of the stylus as a position-determining displacement.
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