| 摘要 |
1,023,079. Vibratory elements. UNITED STATES TIME CORPORATION. March 6, 1964 [March 12, 1963], No. 9716/64. Heading G5J. [Also in Divisions G3 and H3] A resonator for timepieces comprises two vibratory rings 1, 2 of a material which expands with rises of temperature, a base 3 of the same material, and a number of " W "-shaped flat springs 4, 5, 6 of a material which is dimensionally stable with temperature changes. Each spring is fixed at its opposite ends to the respective rings and at its centre to the base, e.g. by posts 8, so that the fixing points are all at the same radial distance from the axis and the rings are supported for rotational vibration in parallel planes about this axis. As the springs are not stressed by temperature changes the frequency is unaffected and cheaper materials, e.g. brass, suffice for the rings and base. In a modification, Fig. 5 (not shown), the springs 4, 5, 6 are turned end-for-end and fixed to a central filler from the base. |
