| 摘要 |
PCT No. PCT/GB91/00243 Sec. 371 Date Jul. 29, 1992 Sec. 102(e) Date Jul. 29, 1992 PCT Filed Jan. 30, 1991 PCT Pub. No. WO91/11637 PCT Pub. Date Aug. 8, 1991.A rotatable disc (1, 3) formed with a coaxial part-toroidal race (26, 27) for use as the input or output disc of the variator for a transmission-especially of the full toroidal kind-of the toroidal-race rolling-traction type, in which the torus radius (rd) of the race, that is to say the radius of curvature of the race measured at a chose point on the race and in a plane including the disc axis, decreases as the distance of that point from the disc axis (5) diminishes. Such decrease of the torus radius may be either continuous or discontinuous.
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